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Wyświetlanie 1-15 z 138
Tytuł:
Strongly rectifiable and S-homogeneous modules
Autorzy:
Tesková, Libuše
Powiązania:
https://bibliotekanauki.pl/articles/728890.pdf
Data publikacji:
2000
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
strongly rectifiable module
S-homogeneous module
pure submodule
refined submodule
pure composite series
Hill's module
Opis:
In this paper we introduce the class of strongly rectifiable and S-homogeneous modules. We study basic properties of these modules, of their pure and refined submodules, of Hill's modules and we also prove an extension of the second Prüfer's theorem.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2000, 20, 1; 5-20
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy balance of a prosument microinverter on-grid photovoltaic system
Bilans energetyczny prosumenckiego mikroinwerterowego systemu fotowoltaicznego dołączonego do sieci
Autorzy:
Sarniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/792265.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
photovoltaic module
energy balance
monitoring system
software
test stand
solar energy
monocrystalline module
polycrystalline module
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2014, 14, 3
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On Injective MV-Modules
Autorzy:
Borzooei, Rajabali A.
Goraghani, S. Saidi
Powiązania:
https://bibliotekanauki.pl/articles/749942.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
(MV, PMV)-algebra
MV-module
injective MV-module
essential extension
Opis:
In this paper, by considering the notion of MV-module, which is the structure that naturally correspond to lu-modules over lu-rings, we study injective MV-modules and we investigate some conditions for constructing injective MV-modules. Then we define the notions of essential A-homomorphisms and essential extension of A-homomorphisms, where A is a product MV-algebra, and we get some of there properties. Finally, we prove that a maximal essential extension of any A-ideal of an injective MV-module is an injective A-module, too.
Źródło:
Bulletin of the Section of Logic; 2018, 47, 4
0138-0680
2449-836X
Pojawia się w:
Bulletin of the Section of Logic
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New cases of equality between p-module and p-capacity
Autorzy:
Caraman, Petru
Powiązania:
https://bibliotekanauki.pl/articles/1312444.pdf
Data publikacji:
1991
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
p-capacity
p-module
Opis:
Let E₀, E₁ be two subsets of the closure D̅ of a domain D of the Euclidean n-space $ℝ^n$ and Γ(E₀,E₁,D) the family of arcs joining E₀ to E₁ in D. We establish new cases of equality $M_pΓ(E₀,E₁,D) = cap_p(E₀,E₁,D)$, where $M_pΓ(E₀,E₁,D)$ is the p-module of the arc family Γ(E₀,E₁,D), while $cap_p(E₀,E₁,D)$ is the p-capacity of E₀,E₁ relative to D and p > 1. One of these cases is when p = n, E̅₀ ∩ E̅₁ = ∅, $E_i = E'_i ∪ E''_i ∪ E'''_i ∪ F_i$, $E'_i$ is inaccessible from D by rectifiable arcs, $E''_i$ is open relative to D̅ or to the boundary ∂D of D, $E'''_i$ is at most countable, $F_i$ is closed (i = 0,1) and D is bounded and m-smooth on (F₀ ∪ F₁) ∩ ∂D.
Źródło:
Annales Polonici Mathematici; 1991, 55, 1; 37-56
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Operation of a system with thermoelectric module applied to cooling an experimental room
Działanie układu z ogniwem termoelektrycznym zastosowanym do chłodzenia komory badawczej
Autorzy:
Gołębiowska, Justyna
Żelazna, Agnieszka
Widomski, Marcin K.
Powiązania:
https://bibliotekanauki.pl/articles/126918.pdf
Data publikacji:
2019
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
thermoelectric module
Peltier module
cooling effect
ogniwo termoelektryczne
moduły Peltiera
efekt chłodzenia
Opis:
Thermoelectric modules (TE), also called Peltier modules, can be used for the cooling processes in various system configurations. The thermoelectric modules act as a heat pump - supplying electrical energy to the TE module causes energy transport from its one side, called the cold side, to the other one, called the hot side. The effects of the Peltier module operation depend on the applied heat exchangers type and the intensity of the current supplied to the module. In this paper, the operation of a selected thermoelectric module used for cooling experimental room of a 0.125 m3 is presented. The heat exchangers, consisting of aluminum radiators integrated with fans, were used to improve the heat exchange process on both sides of the applied TE module. During the tests, the temperature changes inside the experimental room and on the heat sinks on the cold and the hot sides of the TE module at variable current supply from 4 to 6 A were followed. The best results of cooling performance were obtained with 4 and 5 A currents. In these cases, the temperature inside the experimental room was reduced by approx. 9 °C.
Ogniwa termoelektryczne, zwane również ogniwami Peltiera, mogą być wykorzystywane do procesu chłodzenia w różnych rozwiązaniach konfiguracyjnych. Ogniwa termoelektryczne działają jak pompa ciepła dostarczenie energii do ogniwa powoduje, że energią z jego jeden strony, zwanej stroną zimną, jest pobierana i transportowana na drugą, zwaną stroną gorącą. Efekty działania ogniwa Peltiera zależą od zastosowanych wymienników ciepła oraz od natężenia prądu zasilającego ogniowo. W pracy przedstawiono działanie wybranego ogniwa termoelektrycznego wykorzystanego do chłodzenia komory badawczej o kubaturze 0,125 m3. Po obu stronach ogniwa zastosowano wymienniki składające się z radiatorów aluminiowych i wentylatorów w celu usprawnienia procesu wymiany ciepła. Podczas trwania badań śledzono zmianę temperatury wewnątrz komory badawczej, na radiatorze po stronie zimnej oraz na radiatorze po stronie gorącej ogniwa termoelektrycznego przy zmiennym natężeniu prądu zasilającego wynoszącym od 4 do 8 A. Najlepsze efekty chłodzenia otrzymano przy natężeniach prądu 4 i 5 A. W tych przypadkach udało się obniżyć temperaturę wewnątrz komory badawczej o ok. 8 °C. W przypadku zasilenia ogniwa prądem o natężeniu 8 A doszło do ogrzania komory badawczej o ponad 5 °C.
Źródło:
Proceedings of ECOpole; 2019, 13, 1-2; 27-35
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of a thermoelectric generator with radioisotope heat source as a long-lived energy source
Autorzy:
Nosek, M.
Domański, R.
Powiązania:
https://bibliotekanauki.pl/articles/243564.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
radioisotope thermoelectric generator
thermoelectric module
Opis:
Long-lived and sustainable energy sources that are able to supply power in an uninterrupted way without need of maintenance for many years are a topic of interest for many researchers. Thermoelectric generators using radioisotope heat source are currently the longest-lived sources of energy that require no refuelling or other maintenance. Such energy system is also safe and clean. In this article, a mathematical model developed for simulation of a radioisotope thermoelectric generator is presented. The model was prepared using MATLAB/SIMULINK software. It allows performing dynamic simulations of radioisotope thermoelectric generator behaviour with varying load conditions as well as in-time simulations to investigate the effect of aging. A brief theoretical introduction to the topic of thermoelectric generators with radioisotope heat source is presented. Other energy sources typically used in space and remote applications such as fuel cells and photovoltaic systems with auxiliary battery storage are also mentioned and briefly compared. Two cases of radioisotope thermoelectric generator behaviours were simulated. In the first case, the effect of radioisotope decay was investigated, while in the second case the simulations were done at various time instances with varying load conditions. Data received from the simulations was organized and presented. The developed model allows investigating the impact of several thermoelectric generator-working parameters and it is easily modifiable, what could allow performing simulations that are more detailed.
Źródło:
Journal of KONES; 2016, 23, 3; 373-379
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effectiveness of a Learning Module for Statistical Literacy
Autorzy:
Wahab, Abdul
Arif Tiro, Muhammad
Mahmud, Alimuddin
Powiązania:
https://bibliotekanauki.pl/articles/1969315.pdf
Data publikacji:
2018-09-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
statistical literacy
achievement
learning module
Opis:
Statistical literacy is the ability to master statistical concepts, applications, calculations and interpretations. This research is an experiment that aimed to investigate the effectiveness of a learning module for statistical literacy. The presented research focused on discussing and describing the effectiveness of a learning module for statistical literacy. The selected sample involved the public health students of STIKES BBM Majene; 20 students in class A as the sample for try-out I and 25 students in class B as the sample of try-out II by using One Group Pre-test and Post-test Design. The data was collected with the use of an achievement test of statistical literacy, and data was analyzed with the use of Descriptive Statistical Analysis, N-Gain Calculations, and Paired Sample t Test. Research results revealed that the average N-Gain in try-out I was 0.59, and the average N-Gain in try-out II was 0.61, each of which was in the moderate category. Moreover, in try-out I, the mean score of the post-test was 22.15, which was higher than and significantly different from the mean score of the pre-test, which was 10.66. Meanwhile, in try-out II, the mean score of the post-test was 22.68, which was higher than and significantly different from the mean score of the pre-test, which was 10.96. Therefore, the learning module for statistical literacy was effective.
Źródło:
The New Educational Review; 2018, 53; 187-199
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Development of a Thematic Module Based on Numbered Heads Together (NHT) Cooperative Learning Model for Elementary Students in Ambon, Moluccas-Indonesia
Autorzy:
Leasa, Marleny
Talakua, Melvie
Batlolona, John Rafafy
Powiązania:
https://bibliotekanauki.pl/articles/2004843.pdf
Data publikacji:
2016-12-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
module
thematic
NHT
4D
Opis:
This study aimed to examine the effectiveness and practicality of modules used to teach the elementary students in Ambon, Moluccas, Indonesia and as a result generate a thematic module based on Numbered Heads Together (NHT) cooperative learning model. We adopted a 4D development model, which comprises four stages: define, design, develop, and disseminate to produce the module. A survey and interviews were conducted at the define stage and the results proved that the students used modules which only accommodate the traditional learning model. These modules did not provide the students with activities which could help improve their thinking skills. At the define stage, a thematic module was created and at the develop stage, it was revised based on suggestions from experts and the results of the field try-outs. The use of the module showed a significant improvement in student achievement. The final step of the development of the module was performed by providing teachers with a training program on teaching resources and lesson study. Future research is expected to be empirical so that it can investigate the effect of the thematic module on students’ higher order thinking skills.
Źródło:
The New Educational Review; 2016, 46; 174-185
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low voltage PV array model verification on computer aided test setup
Autorzy:
Tomaszuk, A.
Powiązania:
https://bibliotekanauki.pl/articles/376132.pdf
Data publikacji:
2015
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
PV module model
Photovoltaic Systems
Opis:
Low voltage photovoltaic (PV) array delivers electric power to the renewable energy systems which utilize step-up DC-DC converters. The performance of PV array is strictly dependent on environmental conditions such as solar radiation and ambient temperature. In this paper presented is MATLAB model of low voltage 3.2 kWp PV array composed of ten PV panels connected in parallel. The model itself is based on photodiode model and is supported by datasheet parameters of examined PV panels. Presented P-V curves show an influence of solar radiation and temperature on electric power produced by the array. The model simulation results were verified on computer aided laboratory test setup built upon LabVIEW environment. The test setup comprised PV array connected to 6 kW electronic DC load which was controlled by LabVIEW application. Since test conditions should be steady during test time each measurement of real PV array full P-V curve has to be done as quick as possible. This can be assured by computer aided measurement approach where time consumming tests can be easily automated and shortened. This paper presents PV array model, describes test setup and discusses laboratory test results.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2015, 84; 183-189
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power and decorative solar façades
Autorzy:
Frydrychowicz-Jastrzębska, G.
Bugała, A.
Powiązania:
https://bibliotekanauki.pl/articles/376781.pdf
Data publikacji:
2013
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
PV
solar façades
photovoltaic module
Opis:
The work presents an analysis of the possibility of obtaining electric energy from a PV façade, both in the case of standard fitting - tilted at the angle of 90° and directed towards the south, and for a wall fitted at the angle of 75° also directed towards the south. In order to determine the energy gains expected in the second case, a computer simulation confirming the assumptions was executed.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2013, 74; 261-268
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of modular programming to characterize of functional features of the limited mechanisms of coupling
Zastosowanie programu symulacji modułowej w procesie analizy charakterystyki sprzęgieł przeciążeniowych uwzględniającej ich właściwości funkcjonalne
Autorzy:
Broshchak, I.
Lutsiv, I.
Hurey, I.
Powiązania:
https://bibliotekanauki.pl/articles/175825.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
limited mechanism
modular design
distributing module
transmission module
accumulation module
energy flow
mechanizm ograniczający
konstrukcja modułowa
moduł dystrybucji
moduł transmisji
moduł akumulacji
przepływ energii
Opis:
The paper deals with the analysis of limited mechanisms construction designs exemplifying modern restricted couplings of world leading manufacturers. The description of limited mechanism structure as a technical system is given on the base of functional approach. The possibility of limited mechanisms separation into individual modules on the functional principle is proved. Main internal and external links between the elements of the technical system of limited mechanism are analyzed. These elements are proposed to be regarded as individual modules with the certain functions, characteristics and criteria.
W pracy przedstawiono modele nowoczesnych ograniczających mechanizmów konstrukcyjnych na przykładzie sprzęgieł przeciążeniowych dostarczonych od wytwórców. Wykonano analizę charakterystyki badanych sprzęgieł uwzględniającą ich właściwości funkcjonalne. Stwierdzono możliwość zastosowania metody prowadzenia procesu projektowania poszczególnych mechanizmów konstrukcji sprzęgieł na podstawie analizy dostępnych modułów opracowanego programu. Stwierdzono przydatność wszystkich składowych programu symulacji numerycznej na podstawie zdefiniowanych przez użytkownika kryteriów funkcjonalnych, parametrów oraz wymagań konstrukcyjnych.
Źródło:
Advances in Manufacturing Science and Technology; 2014, 38, 3; 33-43
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Projectivity and lifting of Hilbert module maps
Autorzy:
Clark, Douglas
Powiązania:
https://bibliotekanauki.pl/articles/1294735.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Hilbert module
lifting theorem
polynomially bounded
Opis:
In a recent paper, Carlson, Foiaş, Williams and the author proved that isometric Hilbert modules are projective in the category of Hilbert modules similar to contractive ones. In this paper, a simple proof, based on a strengthened lifting theorem, is given. The proof also applies to an equivalent theorem of Foiaş and Williams on similarity to a contraction of a certain 2 × 2 operator matrix.
Źródło:
Annales Polonici Mathematici; 1997, 66, 1; 43-48
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alternative method of making electrical connections in the 1st and 3rd generation modules as an effective way to improve module efficiency and reduce production costs
Autorzy:
Kwaśnicki, Paweł
Gronba-Chyła, Anna
Generowicz, Agnieszka
Ciuła, Józef
Wiewiórska, Iwona
Gaska, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/27312219.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
photovoltaics
busbars
DSSC
BIPV
solar module
Opis:
In this work, we propose a new method for manufacturing busbars in photovoltaic modules for different solar cell generations, focusing on 1st and 3rd generations. The method is based on high-pressure spray coating using nanometric metallic powder. Our focus is primarily on optimizing conductive paths for applications involving conductive layers used in 3rd generation solar cells, such as quantum dot solar cell, dye-sensitized solar cell, and silicon-based solar cells on glass-glass architecture for buildingintegrated photovoltaic. The advantages of the proposed method include the possibility of reducing the material quantity in the conductive paths and creating various shapes on the surface, including bent substrates. This paper examines the influence of the proposed high-pressure spraying technique using metallic particles on the morphology of the resulting conductive paths, interface characteristics, and electrical parameters. Conductive paths were created on four different layers commonly used in photovoltaic systems, including transparent conductive oxide, Cu, Ti, and atomic layer deposition processed Al2O3. The use of high-pressure technology enables the production of conductive layers with strong adhesion to the substrate and precise control of the spatial parameters of conductive paths. Furthermore, the temperature recorded during the deposition process does not exceed 385 K, making this technique suitable for various types of substrates, including glass and silicon. Additionally, the produced layers exhibit low resistance, measuring less than 0.3 Ω. Finally, the mechanical resistance, as determined through tearing tests, as well as environmental and time stability, have been confirmed for the produced paths.
Źródło:
Archives of Thermodynamics; 2023, 44, 3; 179--200
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of optical uniformity factors of backlight module using robust design method
Autorzy:
Wang, Ju-Chi
Fan, Yu-Cheng
Fang, Te-Hua
Tran, Anh-Son
Cheng, Yu-Ting
Powiązania:
https://bibliotekanauki.pl/articles/2060680.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
backlight module
uniformity
Taguchi method
LightTools
Opis:
In order to meet the advent of the high-definition liquid crystal display (LCD) era, in addition to the high-quality panel manufacturing technology, how the backlight module can provide a uniform backlight with higher uniformity for a better experience in viewing, is a very important and urgent issue. In this study, the 15.6-inch side-in backlight module was used as the benchmark, and the Taguchi method was applied to find the high uniformity. The matching of the fishbone diagram affects the optical uniformity factor of the backlight module, such as the size of the light guide plate dot, the color of the plastic frame, the color of the fixed gel of the light guide plate, and the difference of the reflection surface. The optical analog software LightTools is used according to the orthogonal table. The signal-to-noise (S/N) ratio of the average uniformity characteristics is obtained, then it is converted into the best response factor of the factor response table and the factor reaction diagram. The homogeneity at 13 points is as high as 90.12%, which is 4.72% higher than the original design factor. The contribution of the four factors to the uniformity can be obtained by using the variance analysis. Finally, the influence of each factor level on the uniformity is discussed.
Źródło:
Optica Applicata; 2022, 52, 1; 5--20
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical modelling of water-based Fe3O4 nanofluid due to rotating disc and comparison with similarity solution
Autorzy:
Bhandari, Anupam
Powiązania:
https://bibliotekanauki.pl/articles/2037806.pdf
Data publikacji:
2021
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
nanofluid
velocity
CFD Module
dimensionless analysis
Opis:
The current research demonstrates the revolving flow of water-based Fe3O4 nanofluid due to the uniform rotation of the disc. This flow of nanofluid is investigated using CFD Module in COMSOL Multiphysics. However, the similarity solution for this flow is also ob-tained after transforming the given equation into a non-dimensional form. In the CFD Module, streamlines and surface plots are compared with the similarity solution for the magnitude of the velocity, radial velocity, tangential velocity, and axial velocity. The results from the direct simulation in the CFD Module and the solution of dimensionless equations represent a similar solution of velocity distribution. The derived results show that increasing the volume concentration of nanoparticles and effective magnetic parameters decrease the velocity distribu-tion in the flow. Results in the CFD Module are important for monitoring the real-time particle tracing in the flow and, on the other hand, the dimensionless solution is also significant for the physical interpretation of the problem. Both methods of solution empower each other and present the physical model without sacrificing the relevant physical phenomena.
Źródło:
Acta Mechanica et Automatica; 2021, 15, 3; 113--121
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
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