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Tytuł:
Design of a Dual-Polarization Dual-Wideband Planar Antenna
Autorzy:
A'isya Nur Aulia Yusuf
Fitri Yuli Zulkifli
Powiązania:
https://bibliotekanauki.pl/articles/2055241.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
planar antenna
dual wideband
dual polarization
Opis:
Wireless communication is a fundamental requirement because of its low cost, high flexibility and convenience, continuing improvements in speed and connectivity, and accessibility in remote areas. One example is very small aperture terminal (VSAT) communication. A VSAT is a two-way satellite ground station operating at C-band and Ku-band frequencies, with linear and circular polarization in the C band and linear polarization in the Ku band. For the data transmitted by a satellite to be utilized by a user, the antenna on the user side must have dual-wideband and dual-polarization characteristics. In this study, a dual-polarization planar dual-wideband antenna with dimensions of 30 x 39 x 1.52 mm3 was designed using a dual-port approach. The introduction of a slot and perturbation on the patch side results in the dual-wideband characteristics of the antenna. The introduction of slots into the antenna ground results in circular polarization. The proposed antenna has resonant frequencies of 3 - 15 GHz on port 1 and 3.31 – 7.79 GHz and 9.05 – 15 GHz on port 2, with circular polarization characteristics on port 1 and linear polarization characteristics on port 2. On port 1, the gains at frequencies of 4.2 GHz is 3.93 dB, while on port 2, the gains at frequencies of 3.9 GHz is 0.51 dB.
Źródło:
International Journal of Electronics and Telecommunications; 2022, 68, 1; 41--46
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and evaluation of performance of dual field-of-view common-aperture dual-band imaging system
Autorzy:
Wang, Qingsong
Gao, Ming
Powiązania:
https://bibliotekanauki.pl/articles/2172850.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
common aperture
dual-band
dual FOV
performance modeling
Opis:
For the modeling and evaluation of dual field-of-view (FOV) common-aperture dual-band imaging system performance, two factors must be considered at the same time. One is that the system must have a larger target acquisition range, and the other is that the detection range and recognition range of the system must be the same. In this paper, taking the dual FOV common-aperture visible/long-wave infrared (LWIR) imaging system as an example, the performance of the dual FOV common-aperture dual-band imaging system is modeled and evaluated using an imaging system performance model based on comprehensive resolution. Firstly, the target acquisition range of the dual FOV visible imaging system is analyzed, and the condition that the detection range is equal to the recognition range is obtained. Then, under the condition of common aperture, the target acquisition range and the relationship between detection range and recognition range of dual FOV LWIR imaging system are analyzed. The analysis results show that, under the condition of dual FOV and common aperture, when the detection and recognition ranges of the visible imaging system are equal, the detection and recognition ranges of the LWIR imaging system are not equal. When the detection and recognition ranges are close by reducing the comprehensive resolution, the target acquisition range of the dual FOV common-aperture dual-band imaging system will decrease.
Źródło:
Optica Applicata; 2022, 52, 4; 535--550
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pomiary dwuenergetycznej tomografii (Dual Energy CT) w celu badania skał
Calibration of dual energy CT scans for rock core examination
Autorzy:
Dohnalik, Marek
Kaczmarczyk, Jan
Powiązania:
https://bibliotekanauki.pl/articles/1834984.pdf
Data publikacji:
2019
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
tomografia komputerowa
Dual Energy CT
DECT
dwuenergetyczna tomografia
computed tomography
dual energy CT
dual energy computed tomography
Opis:
: Jedno z pierwszych zastosowań rentgenowskiej tomografii komputerowej w geologii miało miejsce w 1974 roku. Tomografia rentgenowska (CT) umożliwia nieinwazyjne obrazowanie badanych przedmiotów. Wynikiem pomiaru tomograficznego jest przestrzenny obraz, przedstawiający zmiany absorpcji promieniowania rentgenowskiego. Powstaje on poprzez wyliczenie, podczas procesu rekonstrukcji, wartości absorpcji dla każdego punktu badanego przedmiotu. Istotną zaletą tomografów komputerowych jest możliwość przebadania dużych obiektów (metrowych odcinków rdzenia) w bardzo krótkim czasie. Ich wadą jest natomiast względnie niska rozdzielczość pomiaru. Każdy woksel na obrazie tomograficznym ma przypisaną konkretną wartość zaczernienia proporcjonalną do liniowego współczynnika tłumienia, zależną od gęstości elektronowej i efektywnej liczby atomowej, uśrednionych w obrazowanej przestrzeni (zakres uśredniania określa rozdzielczość obrazu tomograficznego). Dysponując dwoma obrazami, zarejestrowanymi przy dwóch różnych energiach pomiaru, można podjąć próbę rozdziału obrazu na dwie składowe: pierwszą – zależną od gęstości elektronowej i drugą – zależną od efektywnej liczby atomowej. Celem opisanych prac jest pokazanie możliwości wykorzystania dwuenergetycznej tomografii komputerowej (DECT) do charakterystyki litologiczno-gęstościowej rdzeni wiertniczych. Aby wykorzystać obrazy tomograficzne do otrzymania wymienionych wielkości fizykochemicznych konieczna jest standaryzacja obrazów. W pracy przedstawiono proces wyznaczania współczynników kalibracyjnych, które są niezbędne do przeliczania wartości współczynników absorpcji, będących bezpośrednim wynikiem rekonstrukcji pomiaru tomograficznego na wartości gęstości elektronowej oraz efektywnej liczby atomowej Z. W artykule zaprezentowano proces kalibracji z wykorzystaniem wzorcowych minerałów. Wyliczone z analizy obrazów wartości próbek wzorcowych, porównano z wartościami wyznaczonymi metodami laboratoryjnymi. Przykład zastosowania wyników przedstawiono na przebadanym fragmencie obrazu rdzenia piaskowca, zawierającego szczelinę wypełniona kalcytem.
One of the first applications of X-ray computed tomography in geology took place in 1974. X-ray tomography (CT) allows non-invasive imaging of the examined objects. The result of a tomographic measurement is a spatial image, showing the changes in X-ray absorption value for each point of the examined object, which are a result of calculations during the reconstruction process. An important advantage of computer tomographs is the ability to test large objects (meter sections of the core) in a very short time, while the disadvantage is the relatively low resolution of the measurement. Each voxel in the tomographic image has a specific grey value, proportional to the linear attenuation coefficient, depending on the electron density and the effective atomic number averaged in the imaged space (the averaging range is determined by the resolution of the tomographic image). Two tomographic images registered at two different energies, allows the deconvolution of the images into two components: the first – dependent on the electron density and the second – dependent on the effective atomic number. The aim of this study is to show the possibility of using dual energy computed tomography (DECT) to litho-density characterization of rock cores. In order to use tomographic images to obtain the above-mentioned physicochemical values, it is necessary to standardize CT images. The paper presents the process of determining calibration coefficients, which are necessary to convert the values of absorption coefficients, which are a direct result of CT reconstruction, into density values and effective Z atomic number. The article presents the calibration process with the use of reference rock fragments. The values of the standard samples computed from the analysis of images were compared with the values determined by laboratory methods. An example of the application of results is presented on the examined part of the image of the sandstone core, containing a calcite-filled fracture.
Źródło:
Nafta-Gaz; 2019, 75, 2; 83-88
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pozostałości liczby podwójnej w języku łacińskim epoki archaicznej
Remains of Dual Number Forms in Archaic Latin
Autorzy:
Witczak, Krzysztof Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1878366.pdf
Data publikacji:
2019-10-23
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
liczba podwójna
eliptyczny dual
łacińska morfologia
piąta deklinacja łacińska
dual number
elliptic dual
Latin morphology
Latin fifth declension
Opis:
Artykuł przedstawia prawdopodobne ślady liczby podwójnej występujące w języku łacińskim epoki przedklasycznej. Do nich zaliczamy archaiczne formy genetiwu zakończone na -ūs lub rzadziej (po spółgłoskach labialnych) na -ō̩s (< gen. du. *-ous), pojawiające się 23 razy na inskrypcjach łacińskich z II w. p.n.e. (np. Castorus, Cererus, Diovos, hominus, nominus, partus, regus, Salutus, Venerus), a także formy dopełniacza liczby mnogiej rzeczowników trzeciej deklinacji na -ērum (np. bovērum, Iovērum, lapidērum, nāvērum, nucērum, rēgērum), oparte na nom.-acc. du. na -ē, występujące w tekstach literackich epoki archaicznej, np. bovērum ‘wołów’ (pierwotnie ‘dwóch wołów’) ← nom.-acc. du. *bovē ‘dwa woły’ ← nom. sg. bōs m. f. ‘wół, krowa’. W trakcie procesu zanikania liczby podwójnej pojawiły się gruntowne zmiany w obrębie deklinacji łacińskiej, na skutek których ukształtowała się w obrębie 3 deklinacji specyficzna odmiana dualno-pluralna z charakterystyczną cechą -ē-. Zanik liczby podwójnej odbywał się albo poprzez pluralizację form dualnych, albo poprzez ich kolektywizację i syngularyzację. Ostatecznym rezultatem tych złożonych procesów morfologicznych było uformowanie się osobnej piątej deklinacji łacińskiej.      
The paper describes the possible traces of dual number forms preserved in the Latin language of the archaic period. Certain epigraphic sources of the 2nd century BC contain a total of 23 examples of third declension genitive forms ending in -us or rarely (after labial consonants) -ō̩s (e.g. Castorus, Cererus, Diovos, hominus, nominus, partus, regus, Salutus, Venerus). We can also distinguish genitive plural forms in -ērum (e.g. bovērum, Iovērum, lapidērum, nāvērum, nucērum, rēgērum), which seem to derive from the nominative-accusative du. in *-ē, e.g. bovērum ‘of oxen’ (originally ‘of two oxen’) ← nom.-acc. du. *bovē ‘two oxen’ ← nom. sg. bōs m. f. ‘ox, cow’. The loss of the dual number in the early phase of the development of the Latin language caused massive changes in the Latin declension. Highly specific dual-plural forms of consonant stems characterised by the feature -ē- (cf. *bovē ‘two oxen’, gen. bovērum ‘of oxen’) must have existed within the third Latin declension. Old “petrified” dual forms were generally reinterpreted as plurals (i.e. nom. du. *-ē → nom. pl. -ēs) and sometimes as collectives or singulars. The latter morphological processes led to the formation of the Latin fifth declension.
Źródło:
Roczniki Humanistyczne; 2017, 65, 3; 37-58
0035-7707
Pojawia się w:
Roczniki Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Complexities of Dual Citizenship Analysis
Autorzy:
Pudzianowska, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/498585.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dual citizenship
migration
Polska
Opis:
The prevalent conceptual approach used to assess multiple citizenship legislation is based on analysing a set of selected elements of the relevant legal framework. This paper argues that the evolution of legal rules on dual citizenship cannot be comprehensively analysed using methods created for comparative analyses and based on a narrow selection of legal rules that reflect either a restrictive or an open approach to dual citizenship. The simplified approach that focuses on the analysis of selected fragments of explicit legislation generates results that may be misleading. Therefore, the terms of reference for comparative study of multiple citizenship should be elaborated and extended. A comprehensive comparative method also has to take into account the migration context as well as relevant aspects of the legal and political context. This article explores these issues through an analysis of Polish legal rules in the field of dual citizenship.
Źródło:
Central and Eastern European Migration Review; 2017, 6, 1; 15-30
2300-1682
Pojawia się w:
Central and Eastern European Migration Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Perturbation Element Effect on Frequency Stability in Dual Mode Reconfigurable Filters Based on Circular Microstrip Ring Resonators
Autorzy:
Albahnassi, Muhammad Haitham
Malki, Adnan
Almekdad, Shokri
Powiązania:
https://bibliotekanauki.pl/articles/227210.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dual mode ring resonators
dual-mode filters
perturbation element arrangement
BW reconfigurability
Opis:
A detailed study about the suitable perturbation element shape and location for tunable BW dual mode microstrip filter which has circular ring resonator is presented. BW tuning is achieved by resonator geometry modification. The study explains the effect of a perturbation element on the stability of the center frequency during BW tuning. Different cases have been studied for two shapes of perturbation element; which one is a rectangular and the other is a radial. The treated cases discuss whether the perturbation element is located in the inner or in the outer circumference of the ring, and whether it is a patch or a notch. BW tuning simulation treated the case of FBW3dB increase for two and three times. The best case of perturbation element which has the best center frequency stability has been modeled, simulated, and fabricated at 2.4 GHz. Geometry modification of the filter took into account the RF MEMS modeling. The filter has an elliptic frequency response, and its FBW has been increased in five steps from 1.7% to 5%. The designed filters were evaluated experimentally and by simulation with very good agreement.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 4; 731-737
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-attribute decision-making based on q-rung dual hesitant power dual Maclaurin symmetric mean operator and a new ranking method
Autorzy:
Li, Li
Wang, Jun
Ji, Chunliang
Powiązania:
https://bibliotekanauki.pl/articles/2175106.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
q-rung dual hesitant fuzzy sets
power geometric
dual Maclaurin symmetric mean
power dual Maclaurin symmetric mean
multi-attribute decision-making
Opis:
The ability of q-rung dual hesitant fuzzy sets (q-RDHFSs) in dealing with decision makers’ fuzzy evaluation information has received much attention. This main aim of this paper is to propose new aggregation operators of q-rung dual hesitant fuzzy elements and employ them in multi-attribute decision making (MADM). In order to do this, we first propose the power dual Maclaurin symmetric mean (PDMSM) operator by integrating the power geometric (PG) operator and the dual Maclaurin symmetric mean (DMSM). The PG operator can reduce or eliminate the negative influence of decision makers’ extreme evaluation values, making the final decision results more reasonable. The DMSM captures the interrelationship among multiple attributes. The PDMSM takes the advantages of both PG and DMSM and hence it is suitable and powerful to fuse decision information. Further, we extend the PDMSM operator to q-RDHFSs and propose q-rung dual hesitant fuzzy PDMSM operator and its weighted form. Properties of these operators are investigated. Afterwards, a new MADM method under q-RDHFSs is proposed on the basis on the new operators. Finally, the effectiveness of the new method is testified through numerical examples.
Źródło:
Archives of Control Sciences; 2022, 32, 3; 627--658
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Amenability and the second dual of a Banach algebra
Autorzy:
Gourdeau, Frédéric
Powiązania:
https://bibliotekanauki.pl/articles/1219583.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
amenability
Arens regularity
second dual
Opis:
Amenability and the Arens product are studied. Using the Arens product, derivations from A are extended to derivations from A**. This is used to show directly that A** amenable implies A amenable.
Źródło:
Studia Mathematica; 1997, 125, 1; 75-81
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Novel robust control design for unstable systems with dual pole and dual zero
Autorzy:
Zhang, X.
Zhang, G.
Powiązania:
https://bibliotekanauki.pl/articles/205848.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
unstable process
robust control
improvement
closed-loop gain shaping
dual pole
dual zero
Opis:
In this note, a novel robust control design for a class of unstable systems with dual pole and dual zero is addressed. In the algorithm, αfeedback node was moved from the interior of the controlled plant to its right-hand side. Then, the closed-loop gain shaping algorithm was used to design the feedback transfer function. Consequently, controller and the controlled plant have clear physical meaning and are easily tuned. Simulation results show that the control effects are better than for the previous modification, the system can have rapid settling time with no overshoot, zero steadystate error and satisfactory robust stability to model perturbation and disturbance. The method has the advantages of simple and efficient design, and it was also successfully applied to control static unstable missile.
Źródło:
Control and Cybernetics; 2013, 42, 3; 613-625
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proposal of ecological propulsion for seagoing ships
Autorzy:
Górski, Z.
Ćwilewicz, R.
Powiązania:
https://bibliotekanauki.pl/articles/245781.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
natural gas in marine propulsion
dual fuel marine engines
dual fuel marine boilers
Opis:
Exhaust gases from engines of seagoing ships are the serious problem for environment. That is why the discussion in the matter is very important. One of means to minimise harmful substances emission to earth atmosphere is application of „ecological fuel" — natural gas or nuclear energy for ship propulsion. Natural gas is commonly used in onshore applications but is rarely applied in marine propulsion. Heavy Fuel Oil is the basic brand of fuel used onboard ofseagoing ships. Other kinds of fuel e.g. Diesel Oil or gas Oil are used on smaller ships with limited sailing range. The nuclear energy, due to high costs is used only on few types of warships and some icebreakers. A real means for minimising harmful substances in exhaust gases from ships engines is replacement of Heavy Fuel Oil by Natural gas. Nowadays, heavy oil is commonly used due to technical and logistic abilities and conservative attitude of ship owners. The necessity of improvement in the field of environment protection inclines towards wide application of Natural gas as marine fuel. Application power-plant novel type would break the traditionalism in the shipbuilding and the introduction novel generation ofshipping drives.
Źródło:
Journal of KONES; 2009, 16, 3; 121-128
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A programmable delay line
Autorzy:
Perko, K.
Szplet, R.
Powiązania:
https://bibliotekanauki.pl/articles/114438.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
delay line
dual interpolation method
Opis:
The paper describes the design and test results of a programmable digital delay line implemented in an FPGA device (Kintex-7, Xilinx). The operation of the delay line is based on the modified dual interpolation Nutt method that combines two actions, i.e.: (1) counting the periods of a reference clock and (2) time interpolating within a single clock period. The first action provides an extremely wide range of the introduced delays (> 9 minutes), while the second one allows reaching relatively high delay resolution (2 ns) with a timing jitter as low as 35 ps (until delay of 1 μs). The high metrological parameters of the designed delay line are achieved at the expense of increased difficulty in implementation of the method in an integrated circuit. The major problems to be solved were the synchronizations of input signals as well as synchronous and asynchronous parts of the system, which were effectively provided with the use of two dual-edge synchronizers, a clock signal logic level detection system and associated synchronizers.
Źródło:
Measurement Automation Monitoring; 2015, 61, 7; 311-313
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Role of Family Policy Regimes in Work–Family Adaptations: Polish Parents in Norway and Poland
Autorzy:
Bjørnholt, Margunn
Stefansen, Kari
Wężyk, Agata
Merecz-Kot, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/498735.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dual-earner/dual-carer model
family practices
work–family adaptations
gender equality
family policy
Opis:
The aim of this article is to examine how family policies contribute to changes in family practices and towards gender equality in families. Empirically we draw on interviews with two groups of Polish-born parents: Polish parents who have migrated to Norway and Polish parents living in Poland. Norway and Poland are relevant cases for our exploration because they represent different types of welfare states, which have followed different paths towards their current family policy package. In our analysis of actual work–family adaptations we found a convergence towards gender-equal dual-earner/dual-carer arrangements in both groups, although there were differences in the level of agency. Polish parents in Poland felt less entitled to use the measures available to them, and sometimes refrained from using them, compared to Polish parents in Norway who expressed a strong sense of agency in using family policy measures to create a good life in Norway and as part of a project of change towards more gender-equal sharing of work and care responsibilities. The analysis confirms the strong link between family practices and family policies, but also illustrates how the effect of policies on practices may be hampered or boosted by the wider historical-cultural context of the society in question. In conclusion, in analyses of the link between policy and practice it may be fruitful to distinguish between family policy packages – the concrete set of entitlements for working parents – and family policy regimes, meaning policies in their wider context, including migrancy as a mediating factor.
Źródło:
Central and Eastern European Migration Review; 2017, 6, 2; 31-50
2300-1682
Pojawia się w:
Central and Eastern European Migration Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Closure Operators on Complete Almost Distributive Lattices-III
Autorzy:
Rao, Calyampudi Radhakrishna
Undurthi, Venugopalam
Powiązania:
https://bibliotekanauki.pl/articles/749960.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Complete Almost Distributive Lattice
Closure operator
Dual atom
Dual atomistic
Completely meet-irreducible element
Opis:
In this paper, we prove that the lattice of all closure operators of a complete Almost Distributive Lattice L with fixed maximal element m is dual atomistic. We define the concept of a completely meet-irreducible element in a complete ADL and derive a necessary and sufficient condition for a dual atom of Φ(L) to be complemented.
Źródło:
Bulletin of the Section of Logic; 2015, 44, 1-2
0138-0680
2449-836X
Pojawia się w:
Bulletin of the Section of Logic
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of dual specificity protein kinase from maize seedlings.
Autorzy:
Trojanek, Joanna
Klimecka, Maria
Fraser, Anna
Dobrowolska, Grażyna
Muszyńska, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/1041540.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
dual specificity kinase
tyrosine phosphorylation
maize
Opis:
A protein kinase of 57 kDa, able to phosphorylate tyrosine in synthetic substrates pol(Glu4,Tyr1) and a fragment of Src tyrosine kinase, was isolated and partly purified from maize seedlings (Zea mays). The protein kinase was able to phosphorylate exogenous proteins: enolase, caseins, histones and myelin basic protein. Amino acid analysis of phosphorylated casein and enolase, as well as of phosphorylated endogenous proteins, showed that both Tyr and Ser residues were phosphorylated. Phosphotyrosine was also immunodetected in the 57 kDa protein fraction. In the protein fraction there are present 57 kDa protein kinase and enolase. This co-purification suggests that enolase can be an endogenous substrate of the kinase. The two proteins could be resolved by two-dimensional electrophoresis. Specific inhibitors of typical protein-tyrosine kinases had essentially no effect on the activity of the maize enzyme. Staurosporine, a nonspecific inhibitor of protein kinases, effectively inhibited the 57 kDa protein kinase. Also, poly L-lysine and heparin inhibited tyrosine phosphorylation by 57 kDa maize protein kinase. The substrate and inhibitor specificities of the 57 kDa maize protein kinase phosphorylating tyrosine indicate that it is a novel plant dual-specificity protein kinase.
Źródło:
Acta Biochimica Polonica; 2004, 51, 3; 635-647
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of combustion process in a dual-fuel compression ignition engine fuelled with LPG in the liquid phase
Autorzy:
Luft, S.
Powiązania:
https://bibliotekanauki.pl/articles/246428.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
dual-fuel compression ignition engine
LPG
Opis:
Investigation on fuelling a dual-fuel compression ignition engine with various fuels, that are unconventional for this type of engine, was carried out for many years in the Department of Internal Combustion Engines and Automobiles in Technical University of Radom. Such fuels as methanol, ethanol and natural gas were applied in the investigation. Recently, the investigation regards application of LPG - a fuel that is very popular in Poland. Within the project No. 4T12D02226 of the Committee of Scientific Research, it was tested, among others, an engine equipped with injection system for diesel fuel pilot dose - a common rail type. As a result of the former investigation, load characteristics of specific energy consumption as well as CO, CO2, nox, HC and smoke emissions data were obtained [1]. In order to analyze variability of fundamental combustion process parameters, histories of the pressure inside combustion chamber have been registered during investigation. Investigation on changes of these parameters in the described engine version is particularly important due to possibility of knocking combustion occurrence that leads to the failure of such engine parts as piston or valves. Changes of these parameters versus engine load for various injection timing of diesel fuel pilot dose were analysed.
Źródło:
Journal of KONES; 2007, 14, 3; 355-362
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
DUALIZM EGZEKUTYWY JAKO ZAGROŻENIE DLA PROCESU DEMOKRATYZACJI – RZECZYWISTOŚĆ CZY IMAGINACJA?
DUAL EXEUCTIVE AS A THREAT TO THE PROCESS OF DEMOCRATIZATION – REALITY OR IMAGINATION?
Autorzy:
Banaś, Michał
Powiązania:
https://bibliotekanauki.pl/articles/512898.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
dual executive
threat, transformation
transition
democratization
Opis:
The aim of this article is to analyse the impact of dual executive with the president elected by popular vote on the democratic transformation of post-communist countries of Europe and Eurasia. For this purpose following hypothesis was investigated: the system of government based on dual executive is a threat to democratization. Accepting that this process consists of three parallel transitions (political, economic and social), the author examined the impact of dual executive on the results of post-communist countries of Europe and Eurasia in two indexes: Revised Polity Score and Economic Freedom of the World. Thanks to this study some conclusions could be drawn pertaining to the impact of the system based on dual executive on the effects of the democratization of selected countries in political and economic areas. This allowed following question to be an-swered: is it a fact that a system of government based on dual executive with a president elected by popular vote is a threat to democratization?
Źródło:
Polityka i Społeczeństwo; 2014, 12, 2; 25-36 (12)
1732-9639
Pojawia się w:
Polityka i Społeczeństwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Approaches for Project Costs Minimization with Use of Dual Problems
Autorzy:
Chernov, S.
Titov, S.
Chernova, L.
Kunanets, N.
Powiązania:
https://bibliotekanauki.pl/articles/410624.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
linear optimization
primal problem
dual problem
duality
objective function
constraint system
pairs of dual problems
Opis:
For determining ways of company development, ensuring the growth of profit in manufacture and sales of certain products, it has been proposed to use an algorithm of constructing a problem being inverse to primal-dual one, for minimization of the project costs. The primal and the inverse problems contribute to improving the efficiency of calculation when determining approaches for minimization of costs. This pair of problems is mutually conjugate. The proposed rigorous approach to obtaining the algorithm of constructing a dual problem is based on the following statement: a problem being inverse to a dual one is a primal (original) problem. The authors have proposed and rigorously proven the algorithm of a general approach to the construction of conjugate problem pairs. Formalization of the algorithm developed allows obtaining easily correct pairs of known dual problems. This permitted proposing and proving the truth of the algorithm of constructing a dual problem for the arbitrary form of a primal problem representation.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2019, 8, 2; 61-68
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Moral Competence and Moral Orientation in Robots
Autorzy:
Schmiljun, André
Powiązania:
https://bibliotekanauki.pl/articles/781331.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
moral competence
moral orientation
Georg Lind
robot ethics
Dual Aspect
Dual Layer Theory of Moral Self
Opis:
Two major strategies (the top-down and bottom-up strategies) are currently discussed in robot ethics for moral integration. I will argue that both strategies are not sufficient. Instead, I agree with Bertram F. Malle and Matthias Scheutz that robots need to be equipped with moral competence if we don’t want them to be a potential risk in society, causing harm, social problems or conflicts. However, I claim that we should not define moral competence merely as a result of different “elements” or “components” we can randomly change. My suggestion is to follow Georg Lind’s dual aspect dual layer theory of moral self that provides a broader perspective and another vocabulary for the discussion in robot ethics. According to Lind, moral competence is only one aspect of moral behavior that we cannot separate from its second aspect: moral orientation. As a result, the thesis of this paper is that integrating morality into robots has to include moral orientation and moral competence.
Źródło:
Ethics in Progress; 2019, 10, 2; 98-111
2084-9257
Pojawia się w:
Ethics in Progress
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some dual logic without tautologies
Autorzy:
Górnicka, A.
Bryll, A.
Powiązania:
https://bibliotekanauki.pl/articles/951850.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
podwójna logika
tautologia
dual logic
tautology
Opis:
On this paper we consider a logic dual to the logic CRA and prove that it does not contain tautologies.
Źródło:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics; 2015, 20; 39-47
2450-9302
Pojawia się w:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual completion petroleum production engineering for several oil formations
Autorzy:
Ivanova, T. N.
Korshunov, A. I.
Koretckiy, V. P.
Powiązania:
https://bibliotekanauki.pl/articles/409668.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
dual completion
wells
deposits
layouts
hydrocarbons
Opis:
Cost-efficient, enabling technologies for keeping and increasing the reservoir recovery rate of oil-formations with high water cut of produced fluids and exhausted resource are really essential. One of the easiest but short-term ways to increase oil production and incomes at development of oil deposits is cost of development and capital cost reduction. Therefore, optimal choice and proper feasibility study on the facilities for multilayer oil fields development, especially at the late stage of reservoir working, is a crucial issue for now-day oil industry. Currently, the main oil pools do not reach the design point of coefficient of oil recovery. The basic feature of the late stage of reservoir working is the progressing man-made impact on productive reservoir because of water injection increasing for maintaining reservoir pressure. Hence cost-efficient, enabling technologies for keeping and increasing the reservoir recovery rate of oil-formations with high water cut of produced fluids and exhausted resource are really essential. To address the above concerns the dual completion petroleum production engineering was proposed. The intensity of dual completion of formation with of different permeability is determined by rational choice of each of them. The neglect of this principle results a disproportionately rate of highly permeable formations development for the time. In effect the permeability of the formations or their flow rate is decreasing. The problem is aggravated by lack of awareness of mechanics of layers' mutual interference in producers and injectors. Dual completion experience in Russian has shown, that success and efficiency of the technology in many respects depend on engineering support. One of the sufficient criteria for the choice of operational objects should be maximal involvement of oil-saturated layers by oil displacement from seams over the economic life of well producing oil. If it is about getting high rate of oil recovery for irregular formations there is no alternative to dual completion and production. The recommended dual completion petroleum production technology enables development several formations by single well at the time. The dual completion petroleum production technology has been more important than ever because it is right not only for formations but for thin layers with undeveloped remaining reserves.
Źródło:
Management Systems in Production Engineering; 2018, 4 (26); 217-221
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extension of several sufficient conditions for Hamiltonian graphs
Autorzy:
Ainouche, Ahmed
Powiązania:
https://bibliotekanauki.pl/articles/744192.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
hamiltonian graph
dual closure
neighborhood closure
Opis:
Let G be a 2-connected graph of order n. Suppose that for all 3-independent sets X in G, there exists a vertex u in X such that |N(X∖{u})|+d(u) ≥ n-1. Using the concept of dual closure, we prove that
1. G is hamiltonian if and only if its 0-dual closure is either complete or the cycle C₇
2. G is nonhamiltonian if and only if its 0-dual closure is either the graph $(K_r ∪ Kₛ ∪ Kₜ) ∨ K₂$, 1 ≤ r ≤ s ≤ t or the graph $((n+1)/2)K₁ ∨ K_{(n-1)/2}$.
It follows that it takes a polynomial time to check the hamiltonicity or the nonhamiltonicity of a graph satisfying the above condition. From this main result we derive a large number of extensions of previous sufficient conditions for hamiltonian graphs. All these results are sharp.
Źródło:
Discussiones Mathematicae Graph Theory; 2006, 26, 1; 23-39
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling hybrid powertrain operation of a wheeled vehicle including dual power source
Autorzy:
Banaś, W.
Kost, G.
Nierychlok, A.
Powiązania:
https://bibliotekanauki.pl/articles/99448.pdf
Data publikacji:
2011
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
hybrid powertrain
dual source
wheeled vehicle
Opis:
The paper presents a way of modeling hybrid drive system with a dual source of electricity. The use of such solution is to use better used and flow of energy in hybrid vehicle. Describes the sizing of electrochemical batteries per unit weight of a wheeled vehicle and the system was adopted to supporting the super-capacitor batteries. Presents a concept of switching multiple units in a hybrid system, which adopted the criterion of engine rotational speed and linear speed of the vehicle.
Źródło:
Journal of Machine Engineering; 2011, 11, No. 1-2; 152-161
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie lokomotywy dwunapędowej typu 111DE w transporcie intermodalnym
Application of locomotive dual mode type 111de for intermodal transport
Autorzy:
Pietrzkiewicz, Hubert
Domagała, Radomir
Michalak, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2081119.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Tematy:
lokomotywa
dwunapędowa
intermodalny
locomotive
dual mode
intermodal
Opis:
W ramach artykułu przedstawiono główne założenia Krajowego Programu Kolejowego i stan taborowy lokomotyw spalinowych i elektrycznych w Polsce. Artykuł zawiera opis rozwoju transportu intermodalnego w kraju oraz lokalizację największych terminali intermodalnych na terenie Polski. Zaprezentowany został również rozkład linii kolejowych w Polsce z podziałem na zelektryfikowane i niezelektryfikowane. Przedstawiono dwunapędową lokomotywę typu 111DE zaprojektowaną na potrzeby przewozów intermodalnych i pasażerskich wraz z jej podstawowymi danymi technicznymi i charakterystykami trakcyjnymi. Opisana lokomotywa dwunapędowa zbudowana została podczas realizacji projektu w ramach Programu Operacyjnego Inteligentny Rozwój nr POIR. 01.02.00-00-0191/16-00 pt. „Platforma lokomotyw z zaawansowanymi spalinowo-elektrycznymi (wielosystemowymi) układami napędowymi”, dofinansowywanego przez Narodowe Centrum Badań i Rozwoju. Wykonawcą powyższego projektu są Pojazdy Szynowe PESA Bydgoszcz S.A. i Sieć Badawcza Łukasiewicz – Instytut Pojazdów Szynowych „TABOR” w Poznaniu.
The article presents the main assumptions of the National Railway Program and the rolling stock status of diesel and electric locomotives in Poland. The article describes the development of intermodal transport in the country and the location of the largest intermodal terminals in Poland. The dual-drive locomotive type 111DE designed for intermodal and passenger transport, along with its basic technical data and traction characteristics was presented as a part of the article. The described dual mode locomotive was realized within the Operational Program Intelligent Development No. POIR. 01.02.00-00-0191/16-00 entitled “Locomotive platform with advanced diesel-electric (multi-system) driving systems”, co-funded by the National Center for Research and Development. The contractor of the project is PESA Bydgoszcz S.A. Railroad Vehicles. and the Łukasiewicz Research Network - Institute of Rail Vehicles „TABOR” in Poznań.
Źródło:
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne; 2021, 2 (123); 305--314
1231-9171
Pojawia się w:
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Operation of a drive system using two independent PMSM motors in passenger lift door drives
Autorzy:
Kolano, Krzysztof Jakub
Powiązania:
https://bibliotekanauki.pl/articles/140945.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
door drive
dual drive system
PMSM motor
Opis:
A brushless direct-current (BLDC) and permanent-magnet synchronous motors (PMSMs) with permanent magnets are characterised by the highest operating parameters among all electric motors. High dynamics and the possibility of controlling their work improves the operating parameters of the drive system and reduces the operating costs of such a device. The high cost of these machines associated with the complexity of their construction is a serious barrier to increasing their range in small propulsion systems, where lower energy consumption does not give such spectacular financial profits. To reduce costs, manufacturers often limit the variety of manufactured engines so that by increasing the volume, the unit cost of the device can be minimised. This is often hindered by the implementation of projects deviating from standards where it is necessary to use drive systems of different power. The solution to this problem could be the use of two independent drive systems working in strict correlation to ensure sufficient operating parameters of the device. The article presents a method of controlling a drive system in which two propulsion systems with PMSM engines were used. These devices are communicated with each other by a serial bus, by means of which data necessary for the correct operation of motors connected by a drive belt are transmitted. Since these machines affect both the working machine and each other, it is necessary to optimise such a system so as to avoid excessive oscillation of the drive torque in the system.
Źródło:
Archives of Electrical Engineering; 2019, 68, 1; 47-62
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual dynamic approach to shape optimization
Autorzy:
Fulmański, P.
Nowakowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/969944.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
control
deformation
dual dynamic programming
shape functional
Opis:
We consider the control problem with multidimensional integral functional where state and control satisfy a system of the first order hyperbolic PDE. Next, a type of deformation with control of the domain is described and then we define suitable shape functional. Having defined trajectory and control of deformation the dual dynamic programming tools are applied to derive optimality condition for the shape functional with respect to such a deformation.
Źródło:
Control and Cybernetics; 2006, 35, 2; 205-218
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adherence of minimizers for dual convergences
Autorzy:
Dolecki, S.
Powiązania:
https://bibliotekanauki.pl/articles/970255.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
stability of minimizers
continuous convergence
dual topologies
Opis:
It is proved that many known convergences (e.g., continuous convergence, Isbell topology, compact-open topology, point-wise convergence) on the space of continuous maps (valued in a topological space) can be represented as the dual convergences with respect to collections of families of sets, and that they can be characterized in terms of the corresponding hyperspace convergences of the inverse images of closed sets. As a result, the convergence of real-valued functions for a dual convergence implies the convergence of their sets of minima on the corresponding hyperspace.
Źródło:
Control and Cybernetics; 2007, 36, 3; 647-658
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concept of a multi-fuel, low-power generator with a self-ignition, common rail gas engine
Autorzy:
Piętak, A.
Imiołek, M.
Imiołek, A.
Powiązania:
https://bibliotekanauki.pl/articles/247142.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
dual-fuel feeding
CNG
steering
renewable fuel
Opis:
An idea of using biomass for generating electricity and heat leads to new solutions for power generators, adapted to be supplied with gaseous and liquid biofuels. At present, there is a growing interest in low-power generators. This type of energy production is termed 'scattered energy generation'. It is expected that generating energy in small units situated close to energy consumers may bring about substantial benefits. It is assumed that in a scattered energy generation system, energy will be produced from local fuels, such as broadly understood biomass as a primary component for production of gaseous and liquid biofuels to power low-power energy generators. An adequate amount of biomass must be secured to ensure that biogas can be produced all year round. The easiest way to store highly efficient biomass is to ensile maize and rye as well as grass. The amounts of biogas obtained from these two types of silage are comparable. Using rye as a renewable energy source for production of either bioethanol or biogas is economically viable for at least two reasons: rye grows on poor class soils and rye cultivation technology can be reduced to just nitrogen fertilization. In conclusion, it seems reasonable to generate energy in Poland in scattered energy generation systems from crops grown for this purpose. Currently, gas-powered engines are being in several ways.
Źródło:
Journal of KONES; 2011, 18, 4; 349-356
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of methanol-diesel combustion on performance and emissions of a direct injection diesel engine
Autorzy:
Tutak, W.
Szwaja, S.
Powiązania:
https://bibliotekanauki.pl/articles/241919.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
dual-fuel engine
exhaust emission
modelling
diesel
Opis:
The results of CFD modelling a dual fuel diesel engine powered with both methanol and diesel fuel is presented in the paper. Modelling was performed with 20 and a 50% energetic share of methanol in the entire dose. The analysis was conducted on both the thermodynamic parameters and exhaust toxicity of dual fuel engine. It was found that the various share of methanol influences the ignition delay of the combustion process and after start of main phase of combustion, the process occurs faster than in case of the diesel engine. It was found that the time of 10-90% burn of the fuel is much shorter than it is in the diesel engine. The dual fuel engine was characterized by higher indicated mean pressure in the whole range of diesel fuel injection timings. While analysing toxic exhaust emission from the dual fuel engine powered with methanol, it was found that the rate of NO formation was significantly higher than from the diesel engine. The combustion process in the dual fuel engine occurs more rapidly than in the conventional diesel engine, which contributes to form areas with high temperature, and in combination with presence of oxygen from the air and oxygen bonded in the methanol, promotes the NO formation. In the case of the dual fuel engine, it was found that soot emission was reduced. The engine running with diesel injection start at 8.5 deg before TDC, the soot emissions were more than twice lower in the dual fuel engine, while the emission of NO was much higher.
Źródło:
Journal of KONES; 2015, 22, 2; 259-266
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual fuelling CI engine with methanol and diesel oil
Autorzy:
Stelmasiak, Z.
Powiązania:
https://bibliotekanauki.pl/articles/242614.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
dual fuel
alcohol
methanol
thermal efficiency
toxity
Opis:
Dual fuel compression ignition engine can be run on diverse fuels, both gaseous and liquid ones. Alternative fuels to the Diesel oil feature, as a rule, low cetane number and high temperature of self-ignition. Due to this, such fuels can not be ignited spontaneously and require ignition from small dose of the Diesel oil. In the dual fuel system, as the main fuel can be considered a liquid fuels, which can be supplied to the cylinder in form of vapours, or injected be to the suction manifold. Methyl and ethyl alcohols, or their esters, can be counted among future fuels. Such alcohols can be either the main fuels or small additions improving combustion of the Diesel oil. In the paper are presented test results of the SW 680 engine run on methanol and Diesel oil. Methanol was supplied to the suction manifold in form of methanol-air aerosol. Energetic fraction of the methanol amounted to 12-50%, depending on engine load. Performed tests have shown advantageous effect of the methanol on performance of the engine. One confirmed considerable growth of overall efficiency of the engine in area of higher loads (3-6%), reduction of smokiness of exhaust gases achieved as early as with small additives of the methanol (2-3 times), reduction of CO and CO2 emissions, reduction of exhaust gases temperature. Small addition of the methanol affects advantageously on combustion of the Diesel oil, shortening time if its combustion. Addition of the methanol enables maintaining effective power of the engine fuelled traditionally, and even its slight growth. Cost of adaptation to dual fuel supply with alcohol are low, and such type of fuelling can be easy implemented in already operated compression ignition engines.
Źródło:
Journal of KONES; 2013, 20, 3; 387-393
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jaki w polskich warunkach powinien być tramwaj dwusystemowy?
What tram-train should be in Polish conditions?
Autorzy:
Dąbrowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/251420.pdf
Data publikacji:
2014
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
tramwaj dwusystemowy
Polska
dual-system tram
Polska
Opis:
Niebawem minie już ćwierć wieku od wprowadzenia do eksploatacji w niemieckim mieście Karlsruhe tramwaju poruszającego się po znajdujących się w tym mieście torach tramwajowych oraz kolejowych, dzięki czemu uzyskano bezprzesiadkowe połączenie z miastem Bretten.
Źródło:
TTS Technika Transportu Szynowego; 2014, 1-2; 57-64
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy Analysis of Cavitation Bubbles Under Dual-Frequency Acoustic Excitation
Autorzy:
Lv, Liang
Hu, Kai
Liu, Fei
Li, Yawei
Cui, Bing
Powiązania:
https://bibliotekanauki.pl/articles/31339947.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
dual-frequency acoustic excitation
power
sonoluminescence
sonochemistry
Opis:
Cavitation has been widely used in wastewater degradation, material synthesis and biomedical field under dual-frequency acoustic excitation. The applications of cavitation are closely related to the power (i.e. the rate of internal energy accumulation) during bubble collapse. The Keller–Miksis equation considering liquid viscosity, surface tension and liquid compressibility is used to describe the radial motion of the bubble. The model is built in predicting the power during bubble collapse under dual-frequency acoustic excitation. The influences of parameters (i.e. phase difference, frequency difference, and amplitude ratio) on the power are investigated numerically. With the increase of phase difference, the power can be fluctuated in a wide range at all conditions. Three typical characteristics of the power appear under the effects of frequency difference and amplitude ratio. With the increase of amplitude ratio, if the frequency difference is small, the power has two maximum values; and if the frequency difference is medium, there is a maximum value. Otherwise, the power monotonously decreases. The results can provide theoretical references for the selections of experimental parameters of sonoluminescence and sonochemistry in the dual-frequency acoustic field.
Źródło:
Archives of Acoustics; 2022, 47, 4; 513-518
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rola studiów dualnych w kształtowaniu zasobów rynku pracy na przykładzie modelu niemieckiego
Autorzy:
Piwowarczyk, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2108261.pdf
Data publikacji:
2022-06-30
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
modele kształcenia dualnego
studia dualne w Niemczech
studia ekonomiczne
dual education models
economic studies
dual studies in Germany
Opis:
Głównym celem artykułu jest przedstawienie niemieckiego modelu kształcenia dualnego na studiach wyższych ekonomicznych oraz odpowiedź na pytanie o to, czy studia dualne rozwijają postawy przedsiębiorcze studentów. Na podstawie sformułowanego celu przyjęto hipotezę, że studia dualne rozwijają postawy przedsiębiorcze studentów. Badania oparte zostały na analizie danych wtórnych: informacjach udostępnianych przez niemieckie Ministerstwo Nauki i Edukacji, raportach Komisji Europejskiej, literaturze naukowej oraz treściach udostępnianych na stronach internetowych przedsiębiorstw i uniwersytetów oferujących omawiany model kształcenia. W artykule skoncentrowano się na wybranych przykładach realizacji akademickiego szkolnictwa zawodowego. Na podstawie analizy wyników badań można stwierdzić, że studia dualne rozwijają postawę przedsiębiorczości wśród studentów uczelni ekonomicznych. Artykuł stanowi pokłosie badań, które zostały zrealizowane w ramach w projektu DIALOG 0054/2019, pt.: „Uniwersytet przyszłości - Innowacyjny model dualnego kształcenia na studiach ekonomicznych wspomagany infrastrukturą badawczą” finansowanego przez Ministra Nauki i Szkolnictwa Wyższego.
The main objective of the article is to present the German model of dual education in higher economic studies and to answer the question whether dual studies develop students’ entrepreneurial attitudes. Based on the formulated aim, the hypothesis that dual studies develop students’ entrepreneurial attitudes was accepted. The research is based on the analysis of secondary data: information provided by the german Ministry of Science and Education, reports of the European Commission, scientific literature and content provided on the websites of companies and universities offering this model of education. The article focuses on selected examples of the implementation of academic vocational training. Based on the analysis of research results, it can be concluded that dual studies develop an entrepreneurial attitude among students of economic universities. The article is the result of research, which was carried out within the project DIALOG 0054/2019, entitled: “University of the future - Innovative model of dual education in economic studies supported by research infrastructure” funded by the Minister of Science and Higher Education.
Źródło:
Przedsiębiorczość - Edukacja; 2022, 18, 1; 146-158
2083-3296
2449-9048
Pojawia się w:
Przedsiębiorczość - Edukacja
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual-control missile guidance: a simulation study
Autorzy:
Bużantowicz, W.
Pietrasieński, J.
Powiązania:
https://bibliotekanauki.pl/articles/281826.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
dual-control missile
autopilot
guidance
miss distance
Opis:
Theoretical considerations and a simulation study concerning description and analysis of new autopilot structures and issues relating to conversion of guidance commands into deflections of a complex system of control surfaces aimed at minimizing the miss distance value are presented in this paper. Due to nonlinear and nonstationary nature of the phenomena associated with the guidance process, a significant role is assigned to simulation studies. A comparative analysis has been made of the guidance processes of three models of a dual-control missile, which differ in terms of formulae implemented in the control command converters.
Źródło:
Journal of Theoretical and Applied Mechanics; 2018, 56, 3; 727-739
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Innowacyjna uniwersalna lokomotywa dwunapędowa
Innovative universal dual - drive locomotive
Autorzy:
Michalak, Piotr
Jakuszko, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/249155.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Tematy:
lokomotywa
dwunapędowa
intermodalny
locomotive
dual-drive
intermodal
Opis:
W ramach artykułu przedstawiono główne założenia projektu lokomotywy dwunapędowej przeznaczonej do ruchu pasażerskiego i transportu intermodalnego, której konstrukcja, parametry techniczne oraz eksploatacyjne spełniać będą wymagania obowiązujących norm i przepisów. Przedstawiono także schemat blokowy układu napędowego oraz opisano analizy symulacyjne wykonane w czasie realizacji prac. Artykuł zawiera również opisy rozmieszczenia głównych zespołów i urządzeń w przedziale maszynowym oraz w kabinach maszynisty. Ponadto opisano charakterystyki trakcyjne lokomotywy i przedstawia podstawowe dane techniczne. W podsumowaniu artykułu nakreślono zalety stosowania lokomotywy dwunapędowej w ruchu kolejowym i potencjalne zadania przewozowe do realizacji. Opisany projekt realizowany jest w ramach Programu Operacyjnego Inteligentny Rozwój nr POIR. 01.02.00-00-0191/16-00 pt. „Platforma lokomotyw z zaawansowanymi spalinowo-elektrycznymi (wielosystemowymi) układami napędowymi”, dofinansowywanego przez Narodowe Centrum Badań i Rozwoju. Wykonawcą projektu są Pojazdy Szynowe PESA Bydgoszcz S.A. i Sieć Badawcza Łukasiewicz – Instytut Pojazdów Szynowych „TABOR” w Poznaniu.
As a part of the article the main assumptions of the project of dual-drive locomotive intended for the passenger traffic and intermodal transport, whose construction, technical and operational parameters will meet the requirements of applicable standards and regulations, are presented. The block diagram of driving system is presented and simulation analyses carrying out during realization of works is also described. The article also contains the descriptions of arrangement of main assemblies and devices in the machine room and in the driver’s cabs. Moreover, it describes the traction characteristics of locomotive and it presents the basic technical data. The advantages of using the dual-drive locomotive in the railway traffic and the potential transport tasks to be realized are outlined in the summary of this article. The described project is realized within the Operational Program Intelligent Development No. POIR. 01.02.00-00-0191/16-00 entitled „Locomotive platform with advanced diesel-electric (multi-system) driving systems”, co-funded by the National Centre for Research and Development. The contractor of the project is Pojazdy Szynowe PESA Bydgoszcz S.A. and ŁUKASIEWICZ – IPS „TABOR” in Poznań.
Źródło:
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne; 2019, 2(119); 149-158
1231-9171
Pojawia się w:
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and analysis of spoofing detection algorithms for GNSS signals
Autorzy:
Dobryakova, L.
Lemieszewski, Ł.
Ochin, E.
Powiązania:
https://bibliotekanauki.pl/articles/359990.pdf
Data publikacji:
2014
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
GNSS
GPS
NAVSTAR
GLONASS
Spoofing
Dual-Receiver
Opis:
Many civil GNSS (Global Navigation Satellite System) applications need secure, assured information for asset tracking, fleet management and the like. But there is also a growing demand for geosecurity locationbased services. Unfortunately, GNSS is vulnerable to malicious intrusion and spoofing. How can users be sure the information they receive is authentic? Spoofing is the transmission of matched-GNSS-signalstructure interference in an attempt to commandeer the tracking loops of a victim receiver and thereby manipulate the receiver’s timing or navigation solution. A spoofer can transmit its counterfeit signals from a stand-off distance of several hundred meters or it can be co-located with its victim. Spoofing attacks can be classified as simple, intermediate, or sophisticated in terms of their effectiveness and subtlety. In an intermediate spoofing attack, a spoofer synchronizes its counterfeit signals with the authentic GNSS signals so they are code-phase-aligned at the target receiver. In this paper we consider the anti-spoofing algorithms based on spoofing detection via Dual-Receiver.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 40 (112); 47-52
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finegrained 3D differential operators hint at the inevitability of their dual reciprocal portrayals
Autorzy:
Czajko, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/1065412.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Finegrained differential operators
paired dual reciprocal spaces
Opis:
Extending differential operators during transition from 3D operations to prospective 4D operations imply the need to expand their 4D range far beyond the usual set-theoretical universe from which subsets of the domain are composed. The prospective infrastructural expansion related to the attempted extending of operations virtually requires an extra dual reciprocal space and thus implies presence of a certain multispatial structure of both the mathematical- and the corresponding to it physical reality. At this point the implication is only operational for it is deduced from the attempted extension of operational domain/scope of geometric differential operator, which, in turn, demands an expansion of their range. The necessary presence of an extra space is not being postulated but emerges from comparative evaluations of differential operators. The operational necessity of presence of paired dual reciprocal spaces or quasispatial structures also generalizes contravariance for multispatiality.
Źródło:
World Scientific News; 2019, 132; 98-120
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual pronouns in Genesis A and B
Autorzy:
Krygier, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2054301.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Old English
dual number
personal pronouns
Genesis
Opis:
In Old English dual personal pronouns constituted a small but significant pocket of its inflectional morphology. Their disappearance in Middle English is usually taken as evidence for their marginal and tenuous status already in the preceding centuries. They are seen as optional, poetic, and unpredictable. It is the argument of this paper on the basis of the evidence of the Old English Genesis that these claims warrant a careful revision as – at least in this one poem – there is nothing random or irregular about their use.
Źródło:
Linguistica Silesiana; 2021, 42; 7-19
0208-4228
Pojawia się w:
Linguistica Silesiana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The feminisation of precarity Poland compared to other countries
Autorzy:
Polkowska, Dominika
Powiązania:
https://bibliotekanauki.pl/articles/652589.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
precarity
feminisation
dual-market theory
Post-Fordism
Opis:
Precarity applies to people who, in order to survive, need to work in a low-quality job, which is uncertain, temporary, low-paid, with no prospect of promotion, no security and no contract. In this sense, the precariat is a category related mostly to the secondary segments of the labour market according to the concept of the dual labour market. It is also the universal feature of Post-Fordism and the modern working conditions in which women, more often than men are located in the “worst” segment of the labour market. In this context, it is worth noting that since the beginning of the era of globalisation, women have mostly worked in the sectors more uncertain and unstable e.g., in the service industries and trade. It has been feminisation in a double sense of the word: there have been more and more working women, on the one hand, and on the other hand, women have usually taken the flexible jobs. Most of these jobs are precarious work. Precarity combined with job insecurity and low wages leaves the workforce in this group unable to plan for their future or afford a decent life. This article attempts to prove that the threat of precarity is more probable for women than men. This claim is supported by the OECD and Eurostat data on precarity for Poland and other European countries.
Źródło:
Annales. Etyka w Życiu Gospodarczym; 2017, 20, 8; 119-135
1899-2226
2353-4869
Pojawia się w:
Annales. Etyka w Życiu Gospodarczym
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A review of technical solutions for RCCI engines
Autorzy:
Szamrej, Grzegorz
Karczewski, Mirosław
Chojnowski, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/2097649.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
HCCI
RCCI
dual-fuel
DDFS
silnik dwupaliwowy
Opis:
Engines working in dual-fuel mode need special conditions to ignite air-fuel mixture without spark plug in a good moment with high combustion efficiency. To create homogenous air-fuel mixture the conditions in the cylinder are even more demanding. Many concepts of ignition was developed, but the most effective needs perfect mixing of fuel and air, which is a serious technical challenge. Technical solutions for dual-fuel engines cover the complexity of these problems thus leading to the further development of ignition systems in internal combustion engines. Fuel supply systems, the operation strategy of them, the shape of the combustion chamber are the most important elements to change and develop for correct operation of dual-fuel engines. The literature analysis showed a small amount of research carried out to optimize the operation of dual-fuel engines The variety of engines in which a dual-fuel system can be used requires much more research about them, and solutions necessary for their correctly operation.
Źródło:
Combustion Engines; 2022, 61, 2; 36--46
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dualizing Distance-Hereditary Graphs
Autorzy:
McKee, Terry A.
Powiązania:
https://bibliotekanauki.pl/articles/32083836.pdf
Data publikacji:
2021-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
distance-hereditary graph
dual graph
graph duality
Opis:
Distance-hereditary graphs can be characterized by every cycle of length at least 5 having crossing chords. This makes distance-hereditary graphs susceptible to dualizing, using the common extension of geometric face/vertex planar graph duality to cycle/cutset duality as in abstract matroidal duality. The resulting “DH* graphs” are characterized and then analyzed in terms of connectivity. These results are used in a special case of plane-embedded graphs to justify viewing DH* graphs as the duals of distance-hereditary graphs.
Źródło:
Discussiones Mathematicae Graph Theory; 2021, 41, 1; 285-296
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some results on pseudo-Q algebras
Autorzy:
Rezaei, Akbar
Saeid, Arsham Borumand
Walendziak, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/744634.pdf
Data publikacji:
2017-12-01
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
Pseudo-BCI/BCK algebra
(dual) pseudo-BCH algebra
dual pseudo-Q/QC algebra
(commutative) pseudo-CI/BE algebra
Opis:
The notions of a dual pseudo-Q algebra and a dual pseudo-QC algebra are introduced. The properties and characterizations of them are investigated. Conditions for a dual pseudo-Q algebra to be a dual pseudo-QC algebra are given. Commutative dual pseudo-QC algebras are considered. The interrelationships between dual pseudo-Q/QC algebras and other pseudo algebras are visualized in a diagram.
Źródło:
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica; 2017, 16
2300-133X
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual hesitant pythagorean fuzzy Hamacher aggregation operators in multiple attribute decision making
Autorzy:
Wei, G.
Lu, M.
Powiązania:
https://bibliotekanauki.pl/articles/229895.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multiple attribute decision making (MADM)
dual Pythagorean hesitant fuzzy values
dual hesitant Pythagorean fuzzy Hamacher hybrid average (DHPFHHA) operator
dual hesitant Pythagorean fuzzy Hamacher hybrid geometric (DHPFHHG) operator
power aggregation operators
Opis:
In this paper, we investigate the multiple attribute decision making (MADM) problem based on the Hamacher aggregation operators with dual Pythagorean hesitant fuzzy information. Then, motivated by the ideal of Hamacher operation, we have developed some Hamacher aggregation operators for aggregating dual hesitant Pythagorean fuzzy information. The prominent characteristic of these proposed operators are studied. Then, we have utilized these operators to develop some approaches to solve the dual hesitant Pythagorean fuzzy multiple attribute decision making problems. Finally, a practical example for supplier selection in supply chain management is given to verify the developed approach and to demonstrate its practicality and effectiveness.
Źródło:
Archives of Control Sciences; 2017, 27, 3; 365-395
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Duality and some topological properties of vector-valued function spaces
Autorzy:
Feledziak, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/746589.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
vector-valued function spaces
locally solid topologies
KB-spaces
Levy topologies
Lebesgue topologies
order dual
order continuous dual
perfectness
Opis:
Let \(E\) be an ideal of \(L^0\) over \(\sigma\)-finite measure space \((\Omega, \Sigma, \mu)\) and let \((X, \| \cdot \|_X)\) be a real Banach space. Let \(E(X)\) be a subspace of the space \(L^0(X)\) of \(\mu\)-equivalence classes of all strongly \(\Sigma\)-measurable functions \(f\colon \Omega \to X\) and consisting of all those \(f\in L^0(X)\), for which the scalar function \(\tilde{f} = \|f (\cdot)\|_X\) belongs to \(E\). Let \(E\) be equipped with a Hausdorff locally convex-solid topology \(\xi\) and let \(\xi\) stand for the topology on \(E(X)\) associated with \(\xi\). We examine the relationship between the properties of the space \((E(X), \xi)\) and the properties of both the spaces \((E, \xi)\) and \((X, \|· \|_X)\). In particular, it is proved that \(E(X)\) (embedded in a natural way) is an order closed ideal of its bidual iff \(E\) is an order closed ideal of its bidual and \(X\) is reflexive. As an application, we obtain that \(E(X)\) is perfect iff \(E\) is perfect and \(X\) is reflexive.
Źródło:
Commentationes Mathematicae; 2008, 48, 1
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Abandoning the EPP-feature in Polish dual copula clauses by redefining the predication relation
Autorzy:
Jurczyk, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/1945102.pdf
Data publikacji:
2021-12-30
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
EPP
predication
proposition
dual copula clauses (DCCs)
Agree
Opis:
This paper questions the logic behind the presence and the working of the EPP-feature in Polish dual copula clauses (henceforth, DCCs) with the pronominal copula to, the verbal copula być ‘to be’, and two nominative 3rd person DPs, as represented in Bondaruk (2019). The criticism follows from: (i) – Chomsky’s (2000, 2001) downward Agree operation; (ii) – the view that the predicator encodes the predication relation between the pre-copular subject and the post-copular predicate; (iii) – selective multiple Agree, whereby the satisfaction of the EPP- and uφ-features is divorced. Adopting (i)–(iii), Bondaruk’s scrutiny allows either the pre- or the post-copular DP to occupy SpecTP, thereby accounting for DCCs’ agreement and configurational patterns, but, simultaneously, suffering from theoretical shortcomings it creates. We argue for a simpler satisfaction of the subject requirement which does not rely on the troublesome EPP-feature, but is motivated formally by the relation between T and the higher DP. We derive this requirement by following Zeiljstra’s (2012) upward Agree which only takes place once interpretable features c-command uninterpretable features, and Rothstein’s (2004) approach which is based on a neo-Davidsonian event semantics and which argues that be and its complement form a complex predicate, separated from the pre-copular DP both semantically and syntactically.
Źródło:
Linguistics Beyond and Within; 2021, 7; 33-57
2450-5188
Pojawia się w:
Linguistics Beyond and Within
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel type of wearable dual-band antenna based on coplanar waveguide feeding for wearable wireless communications
Autorzy:
He, Zhengrui
Jin, Jie
Powiązania:
https://bibliotekanauki.pl/articles/1835773.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
wearable antenna
dual-band antenna
CPW-feed
metasurface
Opis:
A flexible and compact coplanar waveguide feed (CPW-fed) wearable antenna is introduced for wireless wearable communications applications at the industrial scientific medical (ISM) band. The proposed antenna consists of copper, which is used as the radiation patch and ground planes printed on the same side of polyimide flexible substrate. The overall size of the antenna is 30 mm × 28 mm × 0.08 mm, the results show that the antenna can transmit and receive signals in two frequency bands of 1.89–2.67 GHz and 3.02–3.23 GHz, in which radiating properties are characterized and agree well with the simulation results. The antenna is bent in different directions to further investigate the reflection coefficient and corresponding effect on the antenna under bending. The center frequency of the antenna is slightly shifted towards higher and lower frequencies when antenna is bent in X-axis and Y-axis, respectively. Furthermore, the wearability of the antenna is verified when the antenna is placed on different parts of the human body such as wrist and chest. Hence, the proposed flexible antenna is a suitable candidate for wearable wireless communication applications.
Źródło:
Optica Applicata; 2021, 51, 2; 159-170
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual-band Bisected Psi Antenna for 3G, Wi-Fi, WLAN and Wi-MAX Applications
Autorzy:
Sura, Penchala Reddy
Reddy, S. Narayana
Powiązania:
https://bibliotekanauki.pl/articles/308721.pdf
Data publikacji:
2020
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
3G
bisected psi
dual-band
stub
WLAN
Opis:
This paper presents an inexpensive and simple dual-band bisected psi antenna for 3G, Wi-Fi, WLAN, and WiMAX applications is presented. The antenna comprises a bisected psi-shaped patch on a low-price FR4 substrate with a cropped ground plane on the other side, and is fed by a 50 Ω microstrip line. It operates at two distinct frequency bands of 1.87–2.76 GHz and 5.16–5.75 GHz with |S11|≤ -10 dB.
Źródło:
Journal of Telecommunications and Information Technology; 2020, 1; 56-61
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual - fuel low power generator with diesel engine using alternative fuels
Autorzy:
Imiołek, M.
Piętak, A.
Imiołek, A.
Powiązania:
https://bibliotekanauki.pl/articles/246549.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
alternative fuels
diesel engine
dual-fuel engine
biofuels
Opis:
At the moment, there is a growing interest in low-power generating units in dispersed system. The production of energy in small units located in the vicinity of the energy recipients offers considerable benefits. First and foremost, it lowers the cost of energy production and the cost of its transfer and also makes the recipient independent from the domestic supplier. Small cogeneration aggregates will facilitate the use of energy from dispersed renewable resources. Gas self-ignition engines in cogeneration system powered with biofuels can be used in construction industry as ecological sources of heat and electrical energy, limiting the need for fossil fuels. This paper presents the possibility of using alternative fuels for internal combustion engines. It describes the possibility of using liquid biofuels separately or natural gas fuel to power diesel engines in dual fuel system. The conception of supplying low-power generator with diesel engine with natural gas to a dose of liquid biofuels test case. Pointed to the factors determining the desirability of a particular concept. Indicated the modification of the engine power to supply the natural gas generator with a dose of liquid biofuels. New technologies of extracting and using biofuels and alternative fuels are being introduced and developed for generating heat and electric energy. Studies on the use of gas and liquid alternative fuels are directly linked to research on the production of renewable and alternative energy as well as environment protection by minimizing emissions of toxic substances into the atmosphere.
Źródło:
Journal of KONES; 2012, 19, 3; 171-176
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biogas as a fuel for diesel engines
Autorzy:
Wierzbicki, S.
Powiązania:
https://bibliotekanauki.pl/articles/246845.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
biogas
methane
diesel engine
dual-fuel supply system
Opis:
The pursuit of reduced greenhouse gas emissions, as well as the increased share of renewable fuels in the overall energy balance has led to a search for alternative energy sources. One of the fuels on which great hopes are set as fuel for engines is biomethane or biogas, whose main component is methane. Biogas can be obtained from different products by using different technologies, so that it has potential as a widelyavailable fuel, which is quite easy to produce. The percentage of methane in biogas depends on the technology for obtaining biogas and ranges from 35% to around 75%. The largest biogas sources can be animal farms, where it is obtained from animal excrement. Another source is sewage treatment plants and rubbish dumps, where substantial quantities of biogas are obtained as a result of natural processes occurring in waste dumping sites or sewage. Biogas can also be acquired from waste obtained from fruit and vegetable processing as well as waste from meat plants. This paper examines the possibility of using biogas as a fuel for diesel engines. In these engines, the combustion of biogas (methane) requires the application of a dual-fuel supply system in which liquid fuel initiating gas fuel selfignition will be injected into the combustion chamber along with methane. The paper also contains example results showing the effect of the methane dose on the course of the combustion process in diesel engines.
Źródło:
Journal of KONES; 2012, 19, 3; 477-482
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Choice of a pilot dose in dual fuel self-ignition engine of a generator, depending on its load
Autorzy:
Imiołek, M.
Piętak, A.
Śmieja, M.
Wierzbicki, S.
Powiązania:
https://bibliotekanauki.pl/articles/247241.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engine
gas engine
dual fuel powering
CNG
Opis:
One of the basic problems concerning dual fuel powering of self-ignition engines is to determine the minimal dose of diesel oil injected into the combustion chamber in order to trigger self-ignition. Most research conducted to date on double-fuel powering self-ignition has been carried out on engines with mechanical injection systems, which does not ensure the possibility of obtaining very small diesel oil doses initiating self-ignition. The original system of fuelling the engine with diesel oil was replaced with a laboratory Common Rail system. The basic parameters of injector operation were controlled by a specially-developed system ensuring continuous choice of parameters of injector operation. The examined engine was fitted with a prototypical system of methane-air fuelling and a system for controlling and adjusting the supplied dose of methane This study presents the results of research aiming at determining the pilot dose injected into the combustion chamber of the engine to ensure the course of combustion in the engine operating under various loads. The results presented in the paper concern tests of a single-cylinder self-ignition engine, HATZ 1B40, operating in a generator adopted for CNG fuelling.
Źródło:
Journal of KONES; 2011, 18, 4; 129-136
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
You are so kind – and I am kind and smart: Actor – Observer Differences in the Interpretation of On-going Behavior
Autorzy:
Abele, Andrea E.
Bruckmüller, Susanne
Wojciszke, Bogdan
Powiązania:
https://bibliotekanauki.pl/articles/430804.pdf
Data publikacji:
2014-12-01
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
actor-observer differences
agency
communion
dual perspective model
Opis:
: The dual perspective model of agency and communion predicts that observers tend to interpret a target’s behavior more in terms of communion than agency, whereas actors interpret their behavior more in terms of agency. The present research for the first time tests this model in real interactions. Previously unacquainted participants had a short conversation and afterwards rated their own behavior (actor perspective) and their interaction partner’s behavior (observer perspective) in terms of agency(self-confident, assertive) and communion(trustworthy, empathic). Supporting the dual perspective model, observers rated the actor’s behavior higher on communion than on agency, and higher on communion than actors themselves did. Findings for actors were more complex: Actors rated their own behavior as more agentic than observers did. However, they also rated their behavior high on communion. We discuss implications for the dual perspective model as well as for (mis)understandings in social interactions.
Źródło:
Polish Psychological Bulletin; 2014, 45, 4; 394-401
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of selected operating parameters of the diesel engine fuelled with mixtures of diesel oil or liquid bio - fuel and natural gas for low - power generators
Autorzy:
Boruta, G.
Imiołek, M.
Powiązania:
https://bibliotekanauki.pl/articles/241789.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
diesel engine
dual-fuel engine
biofuels
alternative fuels
Opis:
Following the modern fuel market, one can notice that prices of liquid petroleum derivatives - petrol and diesel oil - which most often fuel piston internal combustion engines are increasingly higher. Similarly, the price of petroleum-derivative gas (LPG - the liquefied petroleum gas - simply speaking, a mixture of propane and butane) is also growing. Many academic and industrial institutions of science conduct research to determine whether it is possible to replace liquid petroleum-derivative fuels with some other potentially cheaper ones. It would also be beneficial if these new fuels were more "ecological" - so that their combustion products would not be harmful for the environment and if they were produced with the use of plants. Fuel stations commonly offer a fuel for diesel engines which is a mixture of fatty acids methyl esters (FAMEs) from vegetable oils, in Poland for instance from rape seeds. The paper presents a comparison of selected operating parameters of the Hatz 1B40 engine fuelled with mixtures of diesel oil or liquid bio-fuel and natural gas. Indicator diagrams, exhaust gases composition and vibration signals recorded on the engine body were analyzed. The study was conducted on the Hatz 1B40 diesel engine which is used among others in FOGO power generator sets, after replacing the original feeding system by common rail system for liquid fuels and after adding natural gas feeding system.
Źródło:
Journal of KONES; 2012, 19, 4; 111-116
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implementation of Printed Small Size Dual Frequency Antenna in MHz Range
Autorzy:
Eldamak, Angie R.
Ibrahim, Khalid M.
Elkattan, Mohamed
Powiązania:
https://bibliotekanauki.pl/articles/225998.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dual frequency
meander line
MHz range
monopole antenna
Opis:
This paper presents a printed dual band monopole antenna working below 250 MHz using meander line and an added stub. Meander line approach is used to reduce the size of the low frequency monopole. The proposed antenna is fed by microstrip line and printed on FR-4 substrate with an overall size of 290 x 83 mm2. The added stub tuned dual band operation at 114 MHz and 221 MHz with measured reflection coefficient of -19 dB at both bands. The antenna has omni-directional characteristics with efficiency greater than 90% and gain of 1.87, 1.7 dBi at both bands respectively. The antenna design is optimized through a detailed parametric study. This study includes varying stub, Meander, feed and ground dimensions. The antenna has been fabricated and measured where dual band operation in the MHz range is verified.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 4; 565-570
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical study on in-cylinder blending by means of a simultaneous direct injection of two liquid fuels in a heavy duty compression ignition engine
Autorzy:
Kapusta, Ł. J.
Teodorczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/175277.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dual fuel
injection
n-hexane
heavy duty engine
Opis:
Dual fuel combustion has been recently of high interest, mainly in terms of utilization of fuels different than diesel fuel in compression ignition engines. Depending on the properties of a fuel which is additional to diesel fuel, and the type of the additional fuel supply method the combustion process may be strongly modified comparing to single fuel combustion. Nowadays the modification of the combustion process becomes the reason for implementing the dual fuelling process. However, still the main reason for its implementation remains the utilization of nonconventional fuels in compression ignition engines. Among different types of dual fuel systems the one based on simultaneous direct injection of two fuels seems to be most flexible one. It allows to stratify the charge in the cylinder, blend two different fuels at any ratio and does not decrease volumetric efficiency. Therefore, this study aims at mixture formation in a heavy duty engine employing simultaneous direct injection of two different liquid fuels. Special attention was paid to spray breakup and simultaneous evaporation of two fuels which are the key processes in mixture formation.
Źródło:
Transactions of the Institute of Fluid-Flow Machinery; 2015, 128; 5-18
0079-3205
Pojawia się w:
Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphographies en français contemporain. Place du duel en langue écrite dans Le nombre en français de Jean Dubois et Françoise Dubois-Charlier
Morphographies in contemporary French. The place of the duel in written language in Le nombre en français by Jean Dubois and Françoise Dubois-Charlier
Autorzy:
Balibar-Mrabti, Antoinette
Powiązania:
https://bibliotekanauki.pl/articles/31341164.pdf
Data publikacji:
2021-11-10
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Tematy:
Morphology
morphography
morphosyntax
flexion
dual and plural
number
Opis:
With the analysis of a textbook case, the inflectional category of dual in contemporary French, this article presents the hypothesis of a rise in morphology among the founding disciplines of grammar in written languages. Through a study of morphographies, this trend is considered here as a result of the emergence and development of so-called electronic dictionaries, with their lexicographical words as entries to access form / meaning associations. We know that these dictionaries, piloted by mixed teams of computer scientists and linguists, impose themselves step by step as major classificatory tools for the most general treatments, in theoretical and applied linguistics, now related in our modernity to the exploitation of large corpora that have become digitised.
Źródło:
Neophilologica; 2021, 33; 1-19
0208-5550
2353-088X
Pojawia się w:
Neophilologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual hesitant Pythagorean fuzzy Bonferroni mean operators in multi-attribute decision making
Autorzy:
Tang, Xiyue
Wei, Guiwu
Powiązania:
https://bibliotekanauki.pl/articles/229277.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multiple attribute decision making
MADM
dual hesitant Pythagorean fuzzy sets
dual hesitant Pythagorean fuzzy Bonferroni mean operator
DHPFBM
dual hesitant Pythagorean fuzzy geometric Bonferroni mean operator
DHPFGBM
supplier selection
supply chain management
Opis:
In this paper, we investigate the multiple attribute decision making problems based on the Bonferroni mean operators with dual Pythagorean hesitant fuzzy information. Firstly, we introduce the concept and basic operations of the dual hesitant Pythagorean fuzzy sets, which is a new extension of Pythagorean fuzzy sets. Then, motivated by the idea of Bonferroni mean operators, we have developed some Bonferroni mean aggregation operators for aggregating dual hesitant Pythagorean fuzzy information. The prominent characteristic of these proposed operators are studied. Then, we have utilized these operators to develop some approaches to solve the dual hesitant Pythagorean fuzzy multiple attribute decision making problems. Finally, a practical example for supplier selection in supply chain management is given to verify the developed approach and to demonstrate its practicality and effectiveness.
Źródło:
Archives of Control Sciences; 2019, 29, 2; 339-386
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the maritime logistics pricing model of risk-averse retailer-dominated dual-channel supply chain
Autorzy:
Fang, Q.
Tong, Z.
Ren, L.
Liu, A.
Powiązania:
https://bibliotekanauki.pl/articles/258648.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
dual channel
risk-averse
retailer-dominated
supply chain
Opis:
Price decision is studied in a risk-averse retailer-dominated dual-channel supply chain, which consisting of one manufacturers and one retailer with both off-line and on-line channels. Firstly, two mean-variance models in centralized and decentralized supply chain are established. Secondly, the optimal solutions under the two decision modes are compared and analyzed. The results shows that the price of dual-channel of retailer decreased with the increase of retailers’ risk- aversion coefficient and the standard deviation of the fluctuation of market demand, while the wholesale price changes is on the contrary; in addition, when the market demand is greater than a certain value, the prices of dual channel are correspondingly higher in decentralized supply chain than in centralized supply chain, and vice versa. In addition, when the retailer’s risk aversion is in a certain interval, the expected utility of the whole supply chain is greater in centralized supply chain than in decentralized decision, and vice versa. Finally, a numerical example is given to verify the above conclusions.
Źródło:
Polish Maritime Research; 2018, S 2; 107-116
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiplicative inversions involving real zero and neverending ascending infinity in the multispatial framework of paired dual reciprocal spaces
Autorzy:
Czajko, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/1031265.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Multiplicative inversions
dual reciprocal spaces
multispatial algebraic structures
Opis:
Inverses of complex numbers and of analytic functions are composites of mixed type for they are multiplicative inverses (i.e. reciprocals) of the modulus/magnitude combined with additive reverses of the argument/angle. Hence, the mixed inverses in the complex domain ℂ are not really reciprocals and therefore their lack of truly multiplicative reciprocity was a contributing reason that spurred the – unnecessary though still ongoing – prohibition of division by zero which is the natural reciprocal of the neverending ascending real infinity. Truly reciprocal algebraic operations are presented (via multiplicative algebraic inversions) by few examples within the new multispatial framework in terms of their abstract algebraic representations subscripted by the native algebraic bases of the mutually paired dual reciprocal (even though algebraic) spaces in which the inversive operations are performed.
Źródło:
World Scientific News; 2021, 151; 1-15
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New Approach for Solving Intuitionistic Dual Fuzzy Nonlinear Fractional Transportation Problem
Autorzy:
Anju, A.
Anukokila, P.
Powiązania:
https://bibliotekanauki.pl/articles/1068615.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Dual
Intuitionistic Fuzzy
Newton Raphson Method
Nonlinear Equations
Opis:
In this paper a new approach is explained for solving intuitionistic dual fuzzy fractional nonlinear equations. Here we have suggested a numerical method for solving a dual fuzzy nonlinear fractional equations instead of standard analytical techniques which are not suitable everywhere. Initially we wrote a dual fuzzy non-linear fractional equations in parametric form and then solve it by iterative method. An illustrative example is given to show the efficiency of our approach.
Źródło:
World Scientific News; 2019, 132; 220-232
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spaces defined by the level function and their duals
Autorzy:
Sinnamon, Gord
Powiązania:
https://bibliotekanauki.pl/articles/1290183.pdf
Data publikacji:
1994
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
function spaces
Hölder's inequality
Hardy's inequality
dual spaces
Opis:
The classical level function construction of Halperin and Lorentz is extended to Lebesgue spaces with general measures. The construction is also carried farther. In particular, the level function is considered as a monotone map on its natural domain, a superspace of $L^p$. These domains are shown to be Banach spaces which, although closely tied to $L^p$ spaces, are not reflexive. A related construction is given which characterizes their dual spaces.
Źródło:
Studia Mathematica; 1994, 111, 1; 19-52
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiobjective global optimization of mechanical systems with cracks
Autorzy:
Beluch, Witold
Dlugosz, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1839645.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
multiobjective optimization
crack
dual BEM
NURBS
Pareto front
Opis:
The paper is devoted to the multiobjective shape optimization of cracked structures. The two main goals are: reduction of the negative crack influence of identified cracks and optimal design of structural elements to reduce the risk of crack occurrence and growth. NURBS (Non-Uniform Rational B-Splines) curves are used to model the structure boundaries. Global optimization methods in the form of evolutionary algorithms are employed. As different optimization criteria are considered simultaneously, the efficient multiobjective optimization method are applied. An in-house multiobjective evolutionary algorithm is proposed as an efficient optimization tool. The dual boundary element method is used to solve the boundaryvalue problem.
Źródło:
Journal of Theoretical and Applied Mechanics; 2020, 58, 2; 553-564
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and Development of Miniature Dual Antenna GPS-GLONASS Receiver for Uninterrupted and Accurate Navigation
Autorzy:
Sudhir, N. S.
Manvi, S. S.
Powiązania:
https://bibliotekanauki.pl/articles/307676.pdf
Data publikacji:
2014
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
dual-antenna receiver
embedded system
GLONASS
GPS
miniaturization
Opis:
Global Positioning System (GPS), Global Navigation Satellite System (GLONASS), and GPS-GLONASS receivers are commonly used for navigation. However, there are some applications where a single antenna interface to a GPS or GPS-GLONASS receiver will not suffice. For example, an airborne platform such as an Unmanned Aerial Vehicles (UAV) will need multiple antennae during maneuvering. Also, some applications will need redundancy of antenna connectivity to prevent loss of positioning if a link to satellite fails. The scope of this work is to design a dual antenna GPS-GLONASS navigation receiver and implement it in a very small form-factor to serve multiple needs such as: provide redundancy when a link fails, and provide uninterrupted navigation even under maneuvering, also provide improved performance by combining data from both signal paths. Both hardware and software architectures are analyzed before implementation. A set of objectives are identified for the receiver which will serve as the benchmarks against which the receiver will be validated. Both analysis and objectives are highlighted in this paper. The results from the tests conducted on such a dual antenna GPS-GLONASS receiver have given positive results on several counts that promise a wider target audience for such a solution.
Źródło:
Journal of Telecommunications and Information Technology; 2014, 4; 108-115
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Designing a Compact Microstrip Antenna Using the Machine Learning Approach
Autorzy:
Sharma, Kanhaiya
Pandey, Ganga Prasad
Powiązania:
https://bibliotekanauki.pl/articles/1839319.pdf
Data publikacji:
2020
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
artificial neural network
dual band
microstrip antenna
notch
Opis:
This paper presents how machine learning techniques may be applied in the process of designing a compact dual-band H-shaped rectangular microstrip antenna (RMSA) operating in 0.75–2.20 GHz and 3.0–3.44 GHz frequency ranges. In the design process, the same dimensions of upper and lower notches are incorporated, with the centered position right in the middle. Notch length and width are verified for investigating the antenna. An artificial neural network (ANN) model is developed from the simulated dataset, and is used for shape prediction. The same dataset is used to create a mathematical model as well. The predicted outcome is compared and it is determined that the model relying on ANN offers better results.
Źródło:
Journal of Telecommunications and Information Technology; 2020, 4; 44-52
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laboratory Device Detecting the Magnitude of the Static Friction Coefficient of Brake Lining
Autorzy:
Hrabovský, Leopold
Hrbáč, Roman
Powiązania:
https://bibliotekanauki.pl/articles/2023972.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
friction coefficient
brake lining
dual-caliper drum brake
Opis:
The paper describes the design of laboratory equipment, which was created for verification and determination of the value of the static coefficient of friction in the contact surfaces of the brake lining and the brake drum of the drum brake with external shoes by experimental procedure. Suppliers of brake linings state values of the friction coefficients which correspond to different operating temperatures, but do not state the values of the friction coefficient of the respective brake lining with regard to the state of contamination of the contact surfaces. In practice, brake contact surfaces are exposed to moisture, dust, lubricants and oils, and these weather and operational influences significantly affect the value of the coefficient of friction. The results of laboratory tests performed with two types of brake linings (commonly used in practice) (fabric, hardened rubber) show that the coefficient of friction of a given brake lining is strongly influenced by the state of contamination of the contact surfaces.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 2; 191-197
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CNG injector research for dual fuel engine
Autorzy:
Majczak, A.
Barański, G.
Siadkowska, K.
Sochaczewski, R.
Powiązania:
https://bibliotekanauki.pl/articles/102178.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
CNG
diesel
gas flow
gas injector
dual fuel
Opis:
The article presents the tests results of the prototype design of hydraulically assisted injector that is designed for gas supply into diesel engines. The construction of the injector allows for its positioning in the glow plug socket, so that the gas is injected directly into the combustion chamber. The cycle analysis of the four-cylinder Andoria ADCR engine with a capacity of 2.6 dm3 for different crankshaft rotational speeds allowed to determine the necessary time for fuel injection. Because of that, it was possible to determine the required mass flow rate of the injector, for replacing as much of the original fuel by gaseous fuel. To ensure a high value of flow inside the injector, supply pressure equal to 1 MPa was applied. High gas supply pressure requires high value of valve opening forces. For this purpose a injector with hydraulic control system, using a liquid under pressure for the opening process was designed. On the basis of air pressure measurements in the flow line after the injector, the analysis of opening and closing of the valve was made. Measurements of outflow mass of the injector were also carried out. The results showed that the designed injector meets the requirements necessary to supply ADCR engine with CNG fuel.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 1; 212-219
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Observation of intrapulse energy switching in standing-wave electron linac
Autorzy:
Matusiak, Michał
Kosiński, Tymoteusz
Wronka, Sławomir
Zakrzewski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2173383.pdf
Data publikacji:
2022
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
cargo scanning
dual-energy imaging
X-ray imaging
Opis:
For the development of an effective cargo-scanning system, an intrapulse energy switching has been tested at the National Centre for Nuclear Research (NCBJ) with the possibility to change the beam energy within a 4 μs pulse of the linear electron accelerator (linac). Modifi cation of the electron energy is achieved through the beam-loading effect in a standing-wave accelerating structure equipped with a triode gun. Construction of the machine and the achieved results are presented in this article.
Źródło:
Nukleonika; 2022, 67, 3; 43--47
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The aircraft engines in the land vehicles
Autorzy:
Walentynowicz, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/2097583.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
aircraft engines
land vehicle
propulsion systems
dual application
dual use
silniki lotnicze
pojazd lądowy
układy napędowe
podwójne zastosowanie
podwójne użycie
Opis:
The examples of the applications of the aircraft engines to propulsion of the heavy armored land vehicles are presented in this paper. They provide the power necessary for high mobility of these land vehicles, which have a weight much greater than trucks. These engines were mass produced and thus were readily available. It was easier to repair damaged engines, too. Both spark-ignition and compression-ignition piston engines as well as turbocharged engines were used to propulsion of the armored vehicles. General solutions of the dual-purpose engines for the vehicles during the First and Second World War as well as the engines used nowadays are presented. Attention is also given to the specific solutions of these engine assemblies. Their basic technical and operational parameters are described. The implications of adapting aircraft engines to land vehicles were analyzed.
Źródło:
Combustion Engines; 2021, 60, 4; 52--59
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laboratoryjna metoda identyfikacji podwójnej przepuszczalności hydraulicznej na podstawie testu PARAMEX
Laboratory method for determining the parameters of a dual permeability geological formation based on a PARAMEX test
Autorzy:
Wolny, F.
Kaczmarek, M.
Marciniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/2062627.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
podwójna porowatość
podwójna przepuszczalność hydrauliczna
identyfikacja parametrów
metoda PARAMEX
metody optymalizacyjne
dual porosity
dual permeability
PARAMEX
determining hydrogeological parameters
optimization methods
Opis:
Podczas badań terenowych, w trakcie wykonywania testu PARAMEX, odnotowano przypadki odstępstwa krzywych ruchu zwierciadła wody od wykładniczego charakteru. Zaobserwowany przypadek ruchu zwierciadła wody określono jako dwuwykładniczy i postawiono hipotezę, że za dwuwykładniczy charakter ruchu zwierciadła wody może odpowiadać podwójna przepuszczalność hydrauliczna zafiltrowanych utworów. W referacie przeanalizowano możliwości identyfikacji parametrów podwójnej przepuszczalności hydraulicznej utworów wodonośnych na podstawie testu PARAMEX. Zaprojektowano i uruchomiono model laboratoryjny, składający się z trzech pionowych kolumn połączonych poziomą rurą. Model ten, ze względu na kształt i układ połączeń kolumn, nazwano W-rurką. Po zamknięciu jednego z zaworów odcinających, kolumna zewnętrzna i środkowa tworzyły U-rurkę, w której można było oznaczyć współczynnik filtracji jednej próbki gruntu metodą stałogradientową. Opracowano model matematyczny ruchu zwierciadła wody do laboratoryjnej symulacji testu PARAMEX. Model wyprowadzono z równań zachowania masy i rozwiązano metodami optymalizacyjnymi w środowisku obliczeniowym MATLAB. Wykorzystując model matematyczny rozwiązano zagadnienie odwrotne, poprzez wyznaczenie obu wartości współczynników filtracji na podstawie zarejestrowanej doświadczalnie dwuwykładniczej krzywej ruchu zwierciadła wody w kolumnie środkowej. Uzyskane wartości współczynników filtracji porównano ze współczynnikami uzyskanymi metodą stałogradientową. Przeprowadzone eksperymenty i obliczenia pozwoliły pozytywie ocenić przydatność modelu matematycznego do identyfikacji parametrów podwójnej przepuszczalności hydraulicznej na podstawie testu PARAMEX.
During some PARAMEX field tests an unusual rate-of-rise curve was observed. This curve clearly differed from the exponential curve normally registered during such tests. The atypical curve indicates a faster than usual water level rise during the first stage of the test and a slower rise during the last stage. This type of rise is bi-exponential. Based on the documentation of the analysed piezometers, it should be assumed that this type of water level movement is caused by the dual-permeability of the geological formations surrounding the screened zone. In this paper, the possibility to identify the parameters of such formations using a PARAMEX test is analysed. A model capable of simulating PARAMEX tests in a dual-permeability formation was constructed. Because of the model’s shape, the conducted tests were called “W-tube” tests. Water valves at the bottom of the outward columns allowed cutting water flow and therefore registering “U-tube” tests. During these tests, the hydraulic conductivity of a single groundwater formation sample was determined using constant head permeability measurements. A mathematical model of water flow during the laboratory simulation of the PARAMEX test was created. This model allowed interpreting the results laboratory tests: a pair of hydraulic conductivity values was calculated based on the experimentally registered bi-exponential curve. The obtained values of hydraulic conductivity were compared to the values determined during the constant head permeability tests. The mathematical model proved to be adequate for identifying the parameters of dual-permeability based on a PARAMEX test.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2012, 451 Hydrogeologia z. 13; 235--245
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jan Stochel, a stellar mathematician
Autorzy:
Chavan, Sameer
Curto, Raúl
Jabłoński, Zenon Jan
Jung, Il Bong
Putinar, Mihai
Powiązania:
https://bibliotekanauki.pl/articles/29519747.pdf
Data publikacji:
2024
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
unbounded subnormal operator
moment problem
composition operator
Cauchy dual
Opis:
The occasion for this survey article was the 70th birthday of Jan Stochel, professor at Jagiellonian University, former head of the Chair of Functional Analysis and a prominent member of the Kraków school of operator theory. In the course of his mathematical career, he has dealt, among other things, with various aspects of functional analysis, single and multivariable operator theory, the theory of moments, the theory of orthogonal polynomials, the theory of reproducing kernel Hilbert spaces, and mathematical aspects of quantum mechanics.
Źródło:
Opuscula Mathematica; 2024, 44, 3; 303-321
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling and performance analysis of dual-channel switched reluctance motor
Autorzy:
Bogusz, P.
Korkosz, M.
Prokop, J.
Powiązania:
https://bibliotekanauki.pl/articles/950653.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Dual Channel Switched Reluctance Motors
DCSRM
mathematical model
SRM
Opis:
The paper is a presentation of an analysis concerning performance of a 12/8 dual-channel switched reluctance motor (DCSRM). Formulas constituting a base for a non-linear mathematical model of DCSRM are presented. Simulation and laboratory tests were carried out for the motor operating in the dual-channel and single-channel mode. The results of the field theory-based calculations are presented in the form of fluxes in individual phases expressed as functions of currents and a rotor position angle. The results of the computer simulations are shown as the static characteristics of fluxes and the torque as well as voltage, current, and torque waveforms. The results of the laboratory tests are also presented.
Źródło:
Archives of Electrical Engineering; 2015, 64, 1; 89-105
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applying shallow nitrogen implantation from rf plasma for dual gate oxide technology
Autorzy:
Bieniek, T.
Beck, R. B.
Jakubowski, A.
Głuszko, G.
Konarski, P.
Ćwil, M.
Powiązania:
https://bibliotekanauki.pl/articles/308685.pdf
Data publikacji:
2007
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
CMOS
dual gate oxide
gate stack
oxynitride
plasma implantation
Opis:
The goal of this work was to study nitrogen implantation from plasma with the aim of applying it in dual gate oxide technology and to examine the influence of the rf power of plasma and that of oxidation type. The obtained structures were examined by means of ellipsometry, SIMS and electrical characterization methods.
Źródło:
Journal of Telecommunications and Information Technology; 2007, 3; 3-8
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An FPGA-oriented fully parallel algorithm for multiplying dual quaternions
Autorzy:
Cariow, A.
Cariowa, G.
Witczak, M.
Powiązania:
https://bibliotekanauki.pl/articles/114212.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
dual quaternion product
fast algorithms
hardware complexity reduction
FPGA
Opis:
This paper presents a low multiplicative complexity fully parallel algorithm for multiplying two dual quaternions. The “pen-and-paper” multiplication of two dual quaternions requires 64 real multiplications and 56 real additions. More effective solutions still do not exist. We show how to compute a product of two dual quaternions with 24 real multiplications and 64 real additions. During synthesis of the discussed algorithm we use the fact that the product of two dual quaternions can be represented as a matrix–vector product. The matrix multiplicand that participates in the product calculating has unique structural properties that allow performing its advantageous factorization. Namely this factorization leads to significant reducing of the multiplicative complexity of dual quaternion multiplication. We show that by using this approach, the computational process of calculating dual quaternion product can be structured so that eventually requires only half the number of multipliers compared to the direct implementation of matrix-vector multiplication.
Źródło:
Measurement Automation Monitoring; 2015, 61, 7; 370-372
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exhaust emissions of dual fuel spark ignition engine fuelled gasoline and methanol
Autorzy:
Stelmasiak, Z.
Semikow, J.
Powiązania:
https://bibliotekanauki.pl/articles/247184.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
methanol
gasoline
spark ignition engine
dual fuel
exhaust emissions
Opis:
Today, more and more attention is paid to search for alternative fuels, which would be not only environmentally friendly, but also cost-competitive to petroleum fuels. In the recent years much attention is paid to investigations at adaptation of combustion engine to run on bio-fuels. Results of the investigations show, that methyl and ethyl alcohols could belong to one from the most promising and future bio-fuels, being a serious alternative to petroleum fuels. Interest in these fuels comprises such areas as exploration of raw materials to production of the alcohols, development of technology of their production, especially 2nd generation of ethyl alcohol, special fuelling and control systems, design changes of the engines fuelled with alcohols. In the present paper are shown test results of Fiat 1.3 Multipoint engine fuelled in dual fuel system with methanol and gasoline. In this engine one assembled prototype fuel supply system with duplex injectors on each cylinder, to injection of methanol and gasoline. Implemented system enables fuelling with gasoline only, with methanol only, or simultaneously with gasoline and methanol with any fraction of the methanol. Change of fuelling system and change of methanol fraction can be accomplished in course of engine operation. Performed investigations showed advantageous effect of the methanol on toxicity of exhaust gases. One confirmed reduction of emissions of hydrocarbons, nitrogen oxide and carbon dioxide. The biggest changes in the concentration occurred in case of fuelling with the methanol only, and amounted to: 2-3 times reduction of the THC, reduction of NOx with 40-60%. Differences in concentration of NOx increased together with growth of engine load, and hence, they concern such areas of engine operation, where the biggest quantities of the NOx are emitted. In case of dual fuel feeding, effect of reduction of concentration of the components discussed here decreases according to reduced fraction of the methanol. Changes in the emissions discussed here are obtained with maintained engine performance and growth of overall efficiency of the engine. Implemented system eliminates problems of stratification of methanol-gasoline mixture in low temperatures and in presence of water. The system can be adapted to any liquid fuels.
Źródło:
Journal of KONES; 2013, 20, 2; 363-370
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The concept of the tractor powered by biodiesel and biogas
Autorzy:
Kruczyński, S. W.
Pawlak, G.
Wołoszyn, R.
Powiązania:
https://bibliotekanauki.pl/articles/241857.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
biogas
dual fuel CI engine
agriculture tractor
sustainable energy
Opis:
Agriculture farms, especially animal farms consume a lot of energy. They also have big potential to produce energy by themselves. The production of biogas and its efficient utilisation could meet the need for fuel and energy. The production of biogas on a farm and its utilisation as a fuel could improve its energetic balance and safe some money. The paper describes the possible way of utilisation of upgraded manure biogas as a fuel for compression ignition engine, which is adopted for dual fuelling. The engine is going to be fuelled with vegetable oil ester and biogas produced directly on animal farm. Some calculation of fuel consumption of both fuels and analysis of possible changes of combustion process for dual fuelling mode are presented. There is also described the concept of adaptation of CI engine for agriculture tractor to dual fuelling with vegetable oil ester and biogas. In Poland, there are about 1300 caw farms, 3000 pig farms and about 3500 chicken farms. Taking into account that the production of biogas is efficient and give some profit for minimum 100 caws, 500 pigs or 5000 chickens in the farm, there is together about 7800 farms where production of biogas could be profitable [2]. At the end of 2009 there were only 126 installation for biogas production and they produce 70.88 MW of energy. Biogas is one of the most promising sources of renewable energy because the efficiency of conversion of biomass into fuel is relatively high.
Źródło:
Journal of KONES; 2012, 19, 4; 339-346
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual education as a tool for assurance the education of sustainable development
Autorzy:
Natalia, Kulalaieva,
Snizhana, Leu,
Powiązania:
https://bibliotekanauki.pl/articles/890521.pdf
Data publikacji:
2019-12-30
Wydawca:
Akademia Pedagogiki Specjalnej im. Marii Grzegorzewskiej. Wydawnictwo APS
Tematy:
dual education
sustainable development
VET
vocational educational training
education
Opis:
The article substantiates the necessity of introducing the dual education elements into professional training of future specialists. They are listed. As a result of the SWOT analysis for the following process it was defined its strengths (VET regulation by principles of a market economy, increased demand in the labour market for dual education graduates, VET quality corresponded to employers’ requirements; close cooperation between government and business-sector for VET issues; mutually beneficial VET for the state, enterprises and VET institutions; increasing students’ motivation to learning; increasing the prestige of VET) and weak (lack of legal support for dual form of education; imperfection and obsolescence of the material and technical base of P(V)E institutions; insufficient readiness of teachers to introduce dual form of education; the difficulty of finding appropriate enterprises and setting agreements with employers; employers’ reluctance to enter into agreements with students at the beginning of their training; significant time and financial costs for updating the technological park of P(V)E institution ; the need for special psychological and pedagogical training of mentors, instructors – production workers; imperfection of mechanisms for implementing multichannel financing of VET). The questions concerning the dual education system in Ukraine were studied by scientists: N. Abashkina, V. Anischenko, I. Boychevska, T. Kozak, N. Nychkalo, V. Radkevych and others. It is shown that the dual form of education can be a tool for providing education for the sustainable development of society. The features of the dual form of education in Ukraine are analyzed: strengthening the practical component of VET; intellectualization and individualization of VET; the implementation of VET in a real production environment; development of social partnership in VET institution; conformity of VET in VET institution with the regional infrastructure; mentor system introduction; creating innovative educational and production environment for VET. The organizational basis for VET education introduction in P(V)E institutions is given to ensure sustainable the development of society.
Źródło:
International Journal of Pedagogy, Innovation and New Technologies; 2019, 6(2); 104-115
2392-0092
Pojawia się w:
International Journal of Pedagogy, Innovation and New Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A generalized thermoelastic dual-phase-lagging response of thick beams subjected to harmonically varying heat and pressure
Autorzy:
Zenkour, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/949122.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
thermoelasticity
dual-phase-lag model
two-dimensional elasticity solution
Opis:
The generalized thermoelastic problem of a thermo-mechanically loaded beam is studied. The upper surface of the beam is thermally isolated and subjected to a mechanical load while the bottom surface is traction free and subjected to a heating source. Based on the heat conduction equation containing the thermoelastic coupling term and the two-dimensional elasticity theory, thermoelastic coupling differential equations of motion are established. The generalized thermoelasticity theory with the dual-phase-laggings (DPLs) model is used to solve this problem. A closed-form analytical technique is used to calculate vibration of displacements and temperature. The effects of the phase-laggings (PLs), the intensity of the applied load and heat parameters on the field quantities of the beam are discussed. The variation along the axial direction and through-the-thickness distributions of all fields are investigated. Some comparisons have been also shown graphically to estimate the effects of the time on all the studied fields.
Źródło:
Journal of Theoretical and Applied Mechanics; 2018, 56, 1; 15-30
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Impact of Implicit and Explicit Training Methods on the Acquisition of Perceptual Expertise in Young Athletes
Autorzy:
Lola, Afroditi
Votsis, Evandros
Tzetzis, George
Chatzopoulos, Dimitris
Powiązania:
https://bibliotekanauki.pl/articles/1832379.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
attention demands
decision-making
complexity
speed
accuracy
dual sports
Opis:
This study examined the effectiveness of implicit and explicit learning methods on the acquisition and retention of the decision-making skill in low and high complexity situations. 60 novice students were divided into explicit, implicit, and control group. Experimental groups followed 12 training courses. A pre-test, a post-test, and a retention test were used to evaluate the effectiveness of the instructional methods. All participants were evaluated in decision-making speed and accuracy in laboratory tests under simulated conditions. A three-way factorial ANOVA was conducted (3 Group X 2 Complexity X 3 Measurement periods) with repeated measurements on the last factor for the accuracy and reaction time. The analysis showed a significant improvement in decision-making accuracy, in low complexity for both experimental groups. In high complexity situations, the explicit method improved over time and was better than the implicit for decision accuracy. No differences were found among groups or measurements for the decision speed in either low or high complexity situations. It seems that in complex sport conditions, the use of explicit learning helps novices to develop decision-making accuracy more than the implicit learning method, since guided discovery may guide the participants to process contextual information from the sports environment more effectively.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2021, 35, 3; 87-98
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania wpływu parametrów użytkowych dwupaliwowego silnika o zapłonie samoczynnym na jego aktywność wibroakustyczną
The effect of performance parameters of dual fuel CI engine on its vibroacoustical activity
Autorzy:
Zieliński, Ł.
Walczak, D.
Radkowski, S.
Szczurowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/133823.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
silnik dwupaliwowy
diesel
LPG
drgania
dual fuel engine
vibrations
Opis:
Ze względów ekonomicznych i ekologicznych poszukiwane są alternatywne sposoby zasilania silników spalinowych. W silnikach o zapłonie samoczynnym, obserwuje się wzrost zainteresowania instalacjami paliwowymi pozwalającymi na domieszkę propan-butanu. Wynika to z ceny tego paliwa, szerokiej sieci dystrybucji, jak również z poprawy efektywności spalania. Wraz z rozwojem zasilania dwupaliwowego rozsądnym wydaje się być badanie wpływu dodatku LPG na emisję hałasu oraz generowanie drgań. W artykule opisano badania dotyczące zjawisk drganiowych na przykładzie silnika Volkswagena 1.4 TDI ze zmodyfikowanym układem zasilania, pozwalającym na dodawanie LPG w fazie gazowej, jak również w fazie ciekłej. Przedstawiono wyniki badań wibroakustycznych pracy silnika pod obciążeniem na hamowni podwoziowej dla różnych udziałów dawki LPG oraz dla różnych parametrów sterowania, w szczególności zmiany kąta wyprzedzenia wtrysku. Badania były próbą weryfikacji parametrów sterowania w celu uzyskania jak najniższych wartości emitowanego hałasu i drgań, przy jednoczesnym zachowaniu dużej efektywności procesu spalania. Rejestrując drgania na korpusie silnika, jak również na karoserii, oraz hałas, możliwe było wyznaczenia widma amplitudowego, na podstawie którego opracowano wnioski. Stwierdzono, jaki jest optymalny kąt wyprzedzenia wtrysku dla minimalizacji drgań oraz dla uzyskania maksymalnego momentu obrotowego.
Due to economic and ecological reasons alternative ways of supply of combustion engines are looked for. In diesel engines, a growing interest in systems allowing the admixture of propane-butane has been observed. This is due to several reasons: the price of fuel, a wide distribution network, as well as improving combustion efficiency. With the development of dual fuel engine supply, a study of the effects of LPG on noise generation and vibration seems to be reasonable, as well as an attempt to evaluate the combustion process. This paper describes the study of these phenomena on the example of the 1.4 TDI Volkswagen engine with a modified power supply allowing for the addition of LPG in the gas phase and liquid phase. The results of research on engine noise and vibration during operation under load on a chassis dynamometer for different shares of LPG and for different control parameters, in particular the injection timing,. have been presented. The study was an attempt to verify the control parameters in order to obtain the lowest possible value of noise and vibration, while maintaining the high efficiency of the combustion process. By recording vibrations off the motor housing as well as the body, it was possible to determine the noise amplitude spectrum, on the basis of which the conclusions have been formulated.
Źródło:
Combustion Engines; 2015, 54, 3; 271-277
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Joint Calibration Estimator for dual frame surveys
Autorzy:
Elkasabi, Mahmoud A.
Heeringa, Steven G.
Lepkowski, James M.
Powiązania:
https://bibliotekanauki.pl/articles/465638.pdf
Data publikacji:
2015
Wydawca:
Główny Urząd Statystyczny
Tematy:
dual-frame estimation
calibration weighting
auxiliary variables
domain misclassification
Opis:
Many dual frame estimators have been proposed in the statistics literature. Some of these estimators are theoretically optimal but hard to apply in practice, whereas others are applicable but have larger variances than the first group. In this paper, a Joint Calibration Estimator (JCE) is proposed that is simple to apply in practice and meets many desirable properties for dual frame estimators. The JCE is asymptotically design unbiased conditional on the strong relationship between the estimation variable and the auxiliary variables employed in the calibration. The JCE achieves better performance when the auxiliary variables can fully explain the variability in the study variables or at least when the auxiliary variables are strong correlates of the estimation variables. As opposed to the standard dual frame estimators, the JCE does not require domain membership information. Even if included in the JCE auxiliary variables, the effect of the randomly misclassified domains does not exceed the random measurement error effect. Therefore, the JCE tends to be robust for the misclassified domains if included in the auxiliary variables. Meanwhile, the misclassified domains can significantly affect the unbiasedness of the standard dual frame estimators as proved theoretically and empirically in this paper.
Źródło:
Statistics in Transition new series; 2015, 16, 1; 7-36
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wars in the later 21st century: Forecast developments in the methods of warfare
Autorzy:
Górnikiewicz, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/576523.pdf
Data publikacji:
2019-12-24
Wydawca:
Akademia Sztuki Wojennej
Tematy:
forecasting
future warfare
military technologies
dual-use technologies
hostilities
Opis:
This paper attempts to forecast the future of warfare methods in the forthcoming decades of the 21st century. The predictions reflect on the current trends observed in the development of military and civil (dual-use) technologies and changes in thought constructs developed for hostilities. The methods of warfare at the turn of the 21st century are likely to reflect the technological evolution of the modern age. Considering the present-day trends, there is a good probability that our technology-driven lives will transform people into hybrids of biological organisms merged with the technological environment, integrated with the body. Therefore, hostile action against human soldiers could be taken on three major levels: the biological organism, the mass communication technology integrated into the body, and the mental level – both in the conscious and the subconscious sphere. The study into how the soldier’s mental sphere can be influenced to anticipate and shape behaviours may contribute to further research on the third level impact on enemy soldiers. The conclusions formulated in this analysis may carry significant implications for the works on an innovative methodology of the future warfare, accounting for the technological progress in the next decades of the 21st century, and a methodology for countering future military threats.
Źródło:
Security and Defence Quarterly; 2019, 27, 5; 21-31
2300-8741
2544-994X
Pojawia się w:
Security and Defence Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Narcyzm i patologia narcystyczna w ujęciu psychologii self Heinza Kohuta
Narcissim and narcissistic pathology in Heinz Kohut’s self psychology
Autorzy:
Gościniak, Jerzy
Mocek, Michał
Powiązania:
https://bibliotekanauki.pl/articles/2128653.pdf
Data publikacji:
2019-03-28
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
bipolar self
dual-axis theory
narcissism
narcissistic personality disorders
Opis:
W artykule przedstawiono podstawowe pojęcia i założenia psychologii self Heinza Kohuta. Scharakteryzowano dwubiegunowe self oraz warunki i procesy, w jakich zachodzi jego dwutorowy rozwój. Na ich podstawie wyjaśniono zagadnienie i rolę narcyzmu, analizując jego transformację w dojrzałe i patologiczne formy.
This article presents basic concepts and assumptions of self psychology developed by Heinz Kohut. The authors show major shifts in the evolving theories of narcissism and narcissistic pathology, according to Kohut’s bipolar self structure and dual-axis theory of its development.
Źródło:
Roczniki Psychologiczne; 2008, 11, 2; 7-26
1507-7888
Pojawia się w:
Roczniki Psychologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lasers in the dual use technologies
Autorzy:
Mierczyk, Z.
Powiązania:
https://bibliotekanauki.pl/articles/201649.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
lasers
sensors
multispectral imaging
environment monitoring
Dual Use Technology
Opis:
In the more developed countries the use of modern technologies in the national economy is a general process allowing joint funding of a security research and development by both sources, state and private. The last one is especially involved in applications of modern technologies. One of the examples of important modern technologies being under development in many countries are dual-use technologies, which include IT technologies, sensors, effective energy sources, material science, nanotechnology, micro- and nano-electronics, photonics, biotechnology and quantum medicine. In this paper chosen technologies fulfilling the needs of the military technique and security monitoring systems, which have found their applications in the different branches of industry like power engineering, transportation, construction industry, metrology, protection of environment and the medicine, are discussed. The examples include the devices and lasers systems for different threats monitoring, which have been developed at the Military University of Technology. The research studies carried out on the analysis of various materials based on their spectroscopic characteristics: absorption, emission, dispersion, polarization and fluorescence in different mediums have led to the development of laser telemetry devices, environment monitoring devices and spatial imagery, as well as devices for medical diagnostics and therapy. Mentioned systems are composed of functional modules, which were developed to meet the real needs. These systems can be expanded further by addition of extra detectors of chemical materials and physical properties, and improving measuring functions and data transmission and processing.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 4; 691-696
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stereotypes inhibition in syllogistic reasoning. Changes related to age and time measurement repetition during study
Autorzy:
Zając-Lamparska, Ludmiła
Trempała, Janusz
Mrówka, Aleksandra
Powiązania:
https://bibliotekanauki.pl/articles/1178413.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Kazimierza Wielkiego w Bydgoszczy
Tematy:
age stereotypes
cognitive ageing
dual-reasoning theory
syllogistic reasoning
Opis:
The aim of this study was to verify the hypothesis saying that older people on average achieve a lower level of performance than younger at solving syllogisms which contain stereotypical knowledge about aging, and to decide whether the nature of the changes taking place during the test (under the influence of exercise) corresponds to a greater extent to the assumptions of the disuse hypothesis (greater gradient of improvement in elderly subjects), or to the assumptions about age-related decline of developmental plasticity (gradient greater of improvement in the young). Generalizing the empirical findings, we can say that, compared with younger people a slowdown in the syllogistic reasoning does not characterize cognitive functioning of people in late adulthood. They can solve syllogisms just as quickly as younger subjects. However, they respond more slowly when the tasks are subject to stereotypical content and less accurately when the conclusions of syllogisms are false. The analysis of differences and patterns of changes in the speed and correctness of responses during the test of syllogistic reasoning in the age groups leads to ambiguous statements about the expected influence of the age of life in the improvement of performance of tasks under the influence of measurement repetition (practice). We came to the conclusion that in the search for a model of study, which separates from each other the effects of age (macro-developmental changes) and repetition of measurements during the test (micro-developmental changes) probably more useful is a flowchart of tasks’ exposure and comparison of the changes/differences related to age and measurement time. Thus, such studies require an increase of the number of measurements/tasks during the test.
Źródło:
Polskie Forum Psychologiczne; 2013, XVIII, 4; 469-485
1642-1043
Pojawia się w:
Polskie Forum Psychologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual Citizenship in Poland and in Israel: Selected Legal Aspects in a Comparative Perspective
Autorzy:
Zawada, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/594610.pdf
Data publikacji:
2018
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
International relations
legal analysis
dual citizenship
passport
Polska
Israel
Opis:
The tragic years of World War II, followed by the unfriendly communist policy in Poland towards the Jewish community, changed the country from a multicultural into the most homogeneous state in the European Union nowadays. At the same time, Israel, as a meeting place for various cultures, enjoys the influence of inhabitants from nearly all over the world. The dissimilar experiences and problems faced by the governing bodies should influence different approaches to dual citizenship in Poland and Israel. In view of the above, in the presented work the author would like to analyze the issue of the legal approach to dual citizenship both in Poland and in Israel. The main goal of the paper, beyond comparison of the effectiveness of the legislation, is finding the answer to the question: what is the state’s attitude towards the issue of the dual citizenship of their citizens? The hypothesis that the article will verify states, that due to the small number of people with dual citizenship in Poland, Polish legislation devoted to this topic is not extensive and has dissimilarities to the law in Israel, which, in contrast, is more complex and better response to the needs of society. The reason for comparing Poland and Israel is the fact that Polish citizenship has been very popular among the citizens of the Jewish state, especially since 2004 when Poland became a member of the European Union. This issue, in the long run, may be one of the key determinants of Polish-Israeli and Polish-Jewish relations.
Źródło:
Polish Political Science Yearbook; 2018, 2 (47); 302-318
0208-7375
Pojawia się w:
Polish Political Science Yearbook
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of reduction systems of harmful substances into the atmosphere in accordance to requirements of IMO Tier III
Autorzy:
Czmyr, Stanisław
Kaminski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/247763.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
NOx
SOx
MARPOL
atmosphere pollution
marine transportation
dual fuel
Opis:
Degradation of the environment is nowadays believed to be the most alarming problem that needs to be solved. Global warming and environmental pollution are predicted to cause a catastrophic chain reaction leading to species extinction, mass emigration due to rising sea levels and global crisis. The only solution suggested by international organizations is the immediate reduction of greenhouse gases and other harmful substances. Marine transportation harmful substances into the atmosphere are recognized to be a significant source of global atmospheric pollution. Despite the high efficiency of marine diesel engines, their impact on the environment is considerable. Due to environmentally friendly policies, modern engines concerns about not only efficiency but also mainly about s aspects. This article analyses and compares marine s exhaust gases reduction methods. Especially the most harmful substances emitted by ships were taken into consideration. The article presents the most crucial law regulations of harmful substances to the atmosphere, pointing at actual and possible future implementations. The most complex methods allowing meeting the latest limits were presented. Pros and cons of available control methods were thoroughly described and methods were compared. The most adequate methods form the effectiveness and economical point of view was pointed out.
Źródło:
Journal of KONES; 2019, 26, 3; 7-14
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alternative fuels and technologies for compression ignition internal combustion engines
Autorzy:
Bereczky, A.
Powiązania:
https://bibliotekanauki.pl/articles/241749.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
alternative fuels
air pollution
environmental protection
dual fuel technology
Opis:
The traditional use of fossil-based fuels is now widely considered unsustainable because of depleting their natural resources. Potential substitutes of fossil fuels are oils of renewable origin such as various vegetable and non-edible oils. The aim of using these oils or their methyl esters (biodiesel) is to establish and maintain a balance between agriculture, economy and environment protection. However, realizing the increasing demand of raw materials currently used can be achieved not only by increasing the production area but also by introducing new materials or technologies. The article presents and evaluates modern raw fuel components that are currently being investigated. Furthermore, the article deals with the dual fuel combustion technology in detail, with which the processed fuels are becoming available for use in Compression Ignition (CI) engines, where conventional blending is difficult or their use exclusively in diesel engines is economically unjustified. In case of dual fuel engine systems, the primary fuel, such as (wet)ethanol, methanol, LPG, H2 etc. is injected into the intake manifold of the engine and the premixed mixture simultaneously produced is ignited by the pilot diesel fuel as secondary fuel injected directly into the engine cylinder. This technology can significantly reduce exhaust emissions and can slightly increase engine efficiency. The achievements in this field and recently obtained results by the author and his research group are also presented. Exhaust emissions, performance and combustion characteristics were measured and analyzed with respect to several operating parameters as follows: premixed ratio (rp), pilot timing and engine load.
Źródło:
Journal of KONES; 2012, 19, 4; 43-51
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the effect of diesel fuel injection parameters on the combustion process in the turbocharged CI engine operating on propane
Autorzy:
Skrzek, T.
Powiązania:
https://bibliotekanauki.pl/articles/243309.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engines
dual fuel
propane
control of injection parameters
Opis:
Results presented in the article regard the research on a turbocharged dual-fuel CI engine operating on propane. The research indicated that such engine might operate even if 70% of the standard fuel energy is replaced by propane. The research indicated that at such high share of the gaseous fuel, there is necessary to adjust diesel fuel injection parameters but it is important that there is no need to change the engine structure. Injection parameters may be adjusted in a wide range due to the modern fuelling system of the common rail type. The investigated engine was equipped with such system. Adjustments regarding the fuel charge division, fuel charge quantities, and injection timing enabled to influence combustion in such way to obtain its specific parameters, i.e. maximum combustion pressure, rate of pressure rise, maximum pressure, and the burn out ratio similar to those obtained for diesel fuel operation. The obtained results were presented in form of adjustment characteristics of the injection timing of diesel fuel pilot dose for a few chosen values of the boost pressure as well as injection timing of the main dose. The investigations were carried out for three values of the boost pressure, i.e. 200; 400 and 600 [mbar] but also for the naturally aspirated version. Injection timing of the first dose varied in a broad range and depended on the boost pressure. Injection timing of the second dose varied in a narrower range, mainly due to considerable changes in the combustion process. The obtained results answered a number of questions regarding the strategy of selection of diesel fuel injection parameters taking into consideration engine performances as well as combustion at a high share of the gaseous fuel.
Źródło:
Journal of KONES; 2018, 25, 3; 419-429
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiplicative counterpart of the essentially additive Borsuk-Ulam theorem as the pivoting gateway to equidimensional paired dual reciprocal spaces
Autorzy:
Czajko, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/1031786.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Borsuk-Ulam theorem
dual multispatial structures
multispatial mathematical reality
Opis:
Multiplicative counterpart of the essentially additive Borsuk-Ulam theorem is proposed as abstract guiding principle suitable for explanation of intricate mathematical – that is both operational/algebraic and structural/geometric – relationships existing between spaces of equal dimensionality forming dual multispatial structures, which comprise twin equidimensional dual reciprocal spaces. Under auspices of the multispatial reality paradigm, the multiplicatively inversive type of the Borsuk-Ulam theorem can thus be also interpreted as an interspatial pivoting gateway between paired dual reciprocal spaces.
Źródło:
World Scientific News; 2020, 150; 118-131
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Solving dual integral equations on Lebesgue spaces
Autorzy:
Ciaurri, Óscar
Guadalupe, José
Pérez, Mario
Varona, Juan
Powiązania:
https://bibliotekanauki.pl/articles/1205966.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Fourier series
Hankel transform
Bessel functions
dual integral equations
Opis:
We study dual integral equations associated with Hankel transforms, that is, dual integral equations of Titchmarsh's type. We reformulate these equations giving a better description in terms of continuous operators on $L^p$ spaces, and we solve them in these spaces. The solution is given both as an operator described in terms of integrals and as a series $∑_{n=0}^{∞} c_n J_{μ+2n+1}$ which converges in the $L^p$-norm and almost everywhere, where $J_ν$ denotes the Bessel function of order ν. Finally, we study the uniqueness of the solution.
Źródło:
Studia Mathematica; 2000, 142, 3; 253-267
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Investigation on Indicated Pressure and Heat Release for Direct Hydrogen Injection in a Dual Fuel Diesel Engine
Autorzy:
Siadkowska, Ksenia
Barański, Grzegorz
Sochaczewski, Rafał
Wendeker, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/2201773.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
diesel engine
direct hydrogen injection
dual fuel
combustion engine
Opis:
This paper presents the research results for a diesel and hydrogen fueled engine. The research object is a four-cylinder, four-stroke ADCR engine with a displacement of 2,636 cm3. In the experiments, glow plugs were replaced with compressed hydrogen injectors and a special adapter. Hydrogen was supplied directly into a combustion chamber using a test injector. A hydrogen dose in the tests was changed at selected test points and ranged from 0 to 160 dm3/min. The research were conducted at 1,500 rpm. A hydrogen injection start angle and maximum hydrogen dose were specified from the preliminary experiments. The following parameters were analyzed: indicated mean effective pressure, maximum pressure, crank angle of maximum cylinder pressure occurrence and heat release. The obtained results were statistically analyzed. The conducted analysis focused on determining whether there are significant differences between early and late injection and how these changes affect the measured parameters.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 3; 54--66
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aktywność słowotwórcza a zjawisko zapożyczeń na przykładzie czasowników dwuaspektowych (w ujęciu polsko-słowackim)
Autorzy:
Mieczkowska, Halina
Powiązania:
https://bibliotekanauki.pl/articles/678825.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Slawistyki PAN
Tematy:
dual aspect verbs
aspect value
word formation activity
loanwords
Opis:
Word formation activity and the phenomenon of loanwords as exemplified by dual aspect verbs (in Polish-Slovakian interlinguality)The conducted analysis of dual aspect verbs (based on selected linguistic material) and contrasting them with the state observed a quarter or half century ago do not show interdependencies between the existence of the group of genetically foreign dual aspect verbs – which are very limited and virtually relic in Polish but definitely more frequent in Slovakian – and a strong trend for word borrowing. On the contrary, the observed linguistic increase in prefixed oppositional units of perfective aspect indicates that more significant impact on their development and functioning is exerted by the established word formation technique as well as the lexical and grammatical structure of the native language. Aktywność słowotwórcza a zjawisko zapożyczeń na przykładzie czasowników dwuaspektowych (w ujęciu polsko-słowackim)Przeprowadzona analiza czasowników dwuaspektowych (w oparciu o wybrany materiał językowy) i ich konfrontacja ze stanem sprzed ćwierć-, a nawet półwiecza nie wykazują wzajemnych zależności pomiędzy funkcjonowaniem w języku – nielicznej, prawie reliktowej w polszczyźnie i zdecydowanie liczniejszej w języku słowackim – grupy genetycznie obcych czasowników dwuaspektowych a silnym nurtem zapożyczeń. Wręcz przeciwnie – obserwowany przyrost językowy prefiksalnych członów opozycyjnych o wartości aspektu dokonanego wskazuje, że większy wpływ na ich rozwój i funkcjonowanie wywierają utarta technika słowotwórcza i struktura leksykalno-gramatyczna języka rodzimego.
Źródło:
Studia z Filologii Polskiej i Słowiańskiej; 2015, 50
2392-2435
0081-7090
Pojawia się w:
Studia z Filologii Polskiej i Słowiańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vertex coloring the square of outerplanar graphs of low degree
Autorzy:
Agnarsson, Geir
Halldórsson, Magnús
Powiązania:
https://bibliotekanauki.pl/articles/744076.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
outerplanar
chromatic number
power of a graph
weak dual
Opis:
Vertex colorings of the square of an outerplanar graph have received a lot of attention recently. In this article we prove that the chromatic number of the square of an outerplanar graph of maximum degree Δ = 6 is 7. The optimal upper bound for the chromatic number of the square of an outerplanar graph of maximum degree Δ ≠ 6 is known. Hence, this mentioned chromatic number of 7 is the last and only unknown upper bound of the chromatic number in terms of Δ.
Źródło:
Discussiones Mathematicae Graph Theory; 2010, 30, 4; 619-636
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena możliwości i zasadności uruchomienia tramwaju dwusystemowego we Wrocławiu
Assessment of possibility and relevancy of launch double system tram in Wrocław
Autorzy:
Gisterek, I.
Krużyński, M.
Powiązania:
https://bibliotekanauki.pl/articles/193312.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Tematy:
komunikacja tramwajowa
tramwaj dwusystemowy
tram transport
dual-system tramway
Opis:
Modele tramwaju dwusystemowego – Karlsruhe, Kassel, Chemnitz, Zwickau. Opis kompatybilności systemów i stosowanych rozwiązań technicznych.
Models of double system tram - Karlsruhe, Kassel, Chemnitz, Zwickau. Characteristics of systems and applied technical solutions compatibility.
Źródło:
Transport Miejski i Regionalny; 2010, 11; 11-16
1732-5153
Pojawia się w:
Transport Miejski i Regionalny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual sufficient optimality conditions for optimal control
Autorzy:
Młynarska, E.
Powiązania:
https://bibliotekanauki.pl/articles/205961.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
minimum względne
nierówność podwójna Hamiltona-Jacobiego
zagadnienie sterowania optymalnego
dual Hamilton-Jacobi inequality
dual sufficient optimality conditions
optimal control problem
relative minimum
Opis:
In this paper we develop the first and second order dual sufficient optimality conditions for a nonlinear optimal control problem. Our conditions are derived from the dual Hamilton-Jacobi approach applied to the generalized problem of Bolza. We do not require neither any convexity on the data, nor that the control set U be polyhedral, nor that the control function be in the interior of U. Instead, we assume the existence of a function which satisfies a certain inequality.
Źródło:
Control and Cybernetics; 2001, 30, 1; 45-54
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Liczba podwójna w archaicznej poezji rzymskiej
Dual Number in the Archaic Latin Poetry
Autorzy:
Witczak, Krzysztof Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1798771.pdf
Data publikacji:
2019-10-24
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
archaiczna poezja rzymska; liczba podwójna; eliptyczny dualis; łacińska morfologia; wiersz saturnijski
archaic Roman poetry; dual number; elliptic dual; Latin morphology; Saturnian verse
Opis:
Epitafium Lucjusza Korneliusza Scypiona (syna Barbatusa), konsula z 259 roku p.n.e., zawiera starołacińską formę liczby podwójnej Tempestātēbus (dat. du.), odnoszącą się do dwóch bóstw pogody (CIL I2 9). Nazwa ta dowodzi istnienia w języku starołacińskim formacji dualnej *Tempestātē ‘dwa bóstwa pogody’. Wyraz aide, poświadczony w epitafium Scypiona, syna Barbatusa, może być zinterpretowany jako potencjalna forma liczby podwójnej: *aideē (nom.-acc. du. f.) ‘dwudzielna świątynia; budynek sakralny z dwoma sanktuariami’. Liwiusz Andronik używał kilku form liczby podwójnej w łacińskim przekładzie Odysei Homera, między innymi genū (nom.-acc. du. n.) ‘dwa kolana’ (fr. 14), inque manū (acc. du. f.) ‘i do obu rąk’ (fr. 5). Nie wiadomo jednak, czy w przekładzie Andronika użycie liczby podwójnej było konsekwentne, czy opcjonalne. Newiusz wprowadzał do epickiego dzieła Bellum Punicum formy dualne, np. hōc Samnītē ‘ci dwaj Samnici’ (fr. 36). Wydaje się jednak, że poeta nie czynił tego konsekwentnie. Analiza metryczna i rzeczowa niektórych zachowanych fragmentów nie daje jednoznacznej odpowiedzi, czy u Newiusza użycie form liczby dualnej było obligatoryjne, czy wynikało ze swobodnego wyboru rzymskiego poety. W niektórych fragmentach, przekazanych przez tradycję pośrednią, łatwo mogło dojść do sekundarnej pluralizacji dawnych form dualnych.
The archaic epitaph of Lucius Cornelius Scipio (son of Barbatus), consul of 259 BC, contains the Old Latin form Tempestātēbus (in the dative), referring probably to two goddesses of weather (CIL I2 9). This theonym proves the existence in the Old Latin language of the dual formation *Tempestātē ‘two deities of weather’. The word aide, attested in the epitaph of Scipio, son of Barbatus, can be easily interpreted as a possible form of the dual number, namely *aideē (nom.-acc. du. f.) ‘a bipartite (two-sided) temple; a sacral building with two sanctuaries’. Livius Andronicus used some forms of the dual number in his Latin translation of Homer’s Odyssey, among others genū (nom.-acc. du. n.) ‘two knees’ (fr. 14), inque manū (acc. du. f.) ‘and to both hands’ (fr. 5). It is not known, however, whether the use of the dual number in Andronicus’ Odussia was consistent or optional. Naevius introduced some dual forms into the epic work of Bellum Punicum, e.g. hōc Samnītē ‘these two Samnites’ (fr. 36). It seems, however, that the poet did not do it consistently. The metrical and linguistic analysis of the preserved fragments does not give a definite answer as to whether the use of forms of the dual number was obligatory in Naevius’ work, or was the result of the free choice of the Roman poet. In some passages passed down through indirect tradition, it was easy to arrive at the secondary plurality of the old dual forms.
Źródło:
Roczniki Humanistyczne; 2019, 67, 3; 107-123
0035-7707
Pojawia się w:
Roczniki Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laboratory of industrial robotics as source for obtaining of practice knowledges from controlling and programming of robots
Autorzy:
Vagaš, M.
Baláž, V.
Powiązania:
https://bibliotekanauki.pl/articles/101788.pdf
Data publikacji:
2017
Wydawca:
Politechnika Lubelska. Polskie Towarzystwo Promocji Wiedzy
Tematy:
industrial robot
parallel robot
robot SCARA
dual arm robot MOTOMAN
Opis:
The laboratory of industrial robotics aspires to deliver learning opportunities in Science, Technology, Engineering and Mathematics to communities where exposure is limited. The laboratory provides students with the resources to explore the fields of robotics in conjunction with high quality instruction and guidance from industry mentors. This laboratory is characterized by the need of robotics knowledges into traditional secondary vocational schools, which should provide the basic as well as advanced experiences, to address the needs of students, teachers and employees at different education levels. In this paper, we present the development of main workplaces for support virtual Moodle courses, as well as the training and relevant research.
Źródło:
Journal of Technology and Exploitation in Mechanical Engineering; 2017, 3, 2; 1-6
2451-148X
Pojawia się w:
Journal of Technology and Exploitation in Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimisation of decision-making process in industrial robot selection
Autorzy:
Kangru, Tavo
Riives, Jüri
Otto, Tauno
Kuts, Vladimir
Moor, Madis
Powiązania:
https://bibliotekanauki.pl/articles/99703.pdf
Data publikacji:
2020
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
Industry 4.0
industrial robot
performance evaluation
dual optimisation principle
Opis:
The successful selection process of industrial robots (IRs) for today’s Cyber-Physical Systems is an important topic and there are different possibilities to solve the task. The primary task is to estimate the existing IR selection systems according to the suitability analysis and to highlight the main positive features and problematic areas. The objective of the reverse task is to carry out the sensitivity analysis of the existing robot-based manufacturing systems. The matching of these two approaches helps decision makers to develop the main principles of IR selection in today’s multidimensional and fast-changing economic world.
Źródło:
Journal of Machine Engineering; 2020, 20, 1; 70-81
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unrestricted division by zero as multiplication by the – reciprocal to zero – infinity
Autorzy:
Czajko, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/1030823.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Division by zero
multiplication by infinity
paired dual reciprocal spaces
Opis:
It is demonstrated that quite unrestricted operation of conventional division by the real number zero can be implemented via multiplication by the – reciprocal to zero – ascending infinity in paired dual reciprocal spaces, provided that the “real” zero and the infinity are mutually reciprocal (i.e. multiplicatively inverse). Since the infinity is not an absolute concept independent of the particular circumstances in which it is being determined, the value of the setvalued infinity is not fixed but depends on an influence function that is usually applied for evaluation of integral kernels, the operations proposed here are always defined relative to a certain abstract influence function. The conceptual and operational validity of the proposed unrestricted division and multiplication by zero, is authenticated operationally by fairly simple example, using an evaluation of Frullani’s integral.
Źródło:
World Scientific News; 2020, 145; 180-197
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The neurobiology of language: Relevance to linguistics
Autorzy:
Duncan, E. Susan
Tune, Sarah
Small, Steven L.
Powiązania:
https://bibliotekanauki.pl/articles/1152400.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
psychology
information processing
dual stream model
human neuroscience
brain connectivity
Opis:
The study of language is shared by a number of fields, including linguistics, psychology, and neurobiology. While the methods employed by these domains may overlap, they differ in the focus of their scientific inquiry, and the unique perspective of each may inform investigation within the others. We conceptualize this relationship in the context of David Marr’s information processing theory, with neurobiology as the implementational level of language, and discuss the history of the neurobiology of language from early localizationist models to the present day. Decades of electrophysiological and anatomical studies of the macaque monkey support the existence of dual streams for the processing of auditory information. More recent neuroimaging studies suggest that these streams are also present in humans, subserving speech perception and language comprehension. The development of high resolution brain imaging methods and brain stimulation has advanced our ability to study, in vivo, the structures and processes underlying the language network. For those linguists interested in studying language with consideration of the system that implements it, theories and concepts may now be meaningfully informed by neurobiology.
Źródło:
Yearbook of the Poznań Linguistic Meeting; 2016, 2, 1
2449-7525
Pojawia się w:
Yearbook of the Poznań Linguistic Meeting
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On Pell and Pell−Lucas Hybrid Numbers
Autorzy:
Szynal-Liana, Anetta
Włoch, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/962854.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Pell numbers
recurrence relations
complex numbers
hyperbolic numbers
dual numbers
Opis:
In this paper we introduce the Pell and Pell−Lucas hybrid numbers as special kinds of hybrid numbers. We describe some properties of Pell hybrid numbers and Pell−Lucas hybrid numbers among other we give the Binet formula, the character and the generating function for these numbers.
Źródło:
Commentationes Mathematicae; 2018, 58, 1-2; 11-17
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Dual-band Circularly-polarized Printed Monopole Antenna for Wi-Fi and WiMAX Applications
Autorzy:
Lwin, Zaw Myo
Aye, Thae Su
Powiązania:
https://bibliotekanauki.pl/articles/307652.pdf
Data publikacji:
2019
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
circular polarization
dual-band antenna
printed monopole antenna
rectangular slit
Opis:
This paper presents a rectangular-shaped printed monopole antenna with circular polarization for Wi-Fi (2.4–2.484 GHz) and WiMAX (3.3-3.7 GHz) bands. The antenna relies on asymmetric arrangement of the patch with respect to the microstrip feed, in order to generate circular polarization. Dual-band (Wi-Fi and WiMAX) operation is enabled by inserting a slit in the corner of the ground plane. Simulation results show a bandwidth increase of 15.9% (2.2–2.58 GHz) for Wi-Fi, and of 24.16% (3.13–3.99 GHz) for WiMAX applications. Furthermore, beamwidths at the axial ratio of 3 dB equal 48˚ and 51˚ for the x-z plane and y-z planes, respectively.
Źródło:
Journal of Telecommunications and Information Technology; 2019, 4; 50-54
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
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