Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "fast" wg kryterium: Temat

  Lista filtrów

Dostawca treści

Podbaza

Wyrównaj
Wyświetlanie 1-50 z 294
Tytuł:
Szybkie zaworowanie turbin parowych dużych bloków jako środek zwiększenia stabilności krajowego systemu Elektroenergetycznego
Fast-valving of large steam turbine units as means of power system security enhancement logic
Autorzy:
Sobczak, B.
Rink, R.
Kuczyński, R.
Trębski, R.
Powiązania:
https://bibliotekanauki.pl/articles/267671.pdf
Data publikacji:
2013
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
szybkie zaworowanie
fast-valving
fast valving
power system stability
Opis:
W referacie przedstawiono zasady działania szybkiego zaworowania (fast-valving) i korzyści stosowania tej techniki we współczesnych systemach elektroenergetycznych. Omówione zostały modelowe badania skuteczności FV w warunkach KSE oraz analiza możliwości wprowadzenia FV na bloku 560 MW El. Kozienice, wykonane w ramach I etapu pracy IASE Wrocław i Instytutu energetyki Oddział Gdańsk dla PSE SA, której przedmiotem jest analiza możliwości zastosowania FV w pracujących w KSE i planowanych do przyłączenia dużych blokach konwencjonalnych.
Fast-valving assists in maintaining system stability following a severe transmission system fault by reducing the turbine mechanical power. Fast-valving consists in rapid closing and opening of steam valves in adequate manner to reduce the generator accelerating power following the recognition of a severe fault. FV can be an effective and economical method of meeting the performance requirements of power system in the presence of the increase of wind and solar generation in power system and newly connected large thermal units and delaying of building new transmission lines. The principle of fast-valving and advantages of application this technique in large steam turbine units were presented in the paper. Effectiveness of fast-valving in enhancing the stability of Polish Power Grid was analyzed. Feasibility study of fast-valving application in the 560 MW unit in Kozienice Power Station (EW SA) was discussed.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2013, 32; 115-118
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie ultrasonograficzne według protokołów FAST i eFAST
Ultrasound examination according to protocols FAST and eFAST
Autorzy:
Fedak, Andrzej
Świętoń, Faustyna
Powiązania:
https://bibliotekanauki.pl/articles/985964.pdf
Data publikacji:
2019
Wydawca:
Indygo Zahir Media
Tematy:
protokół FAST
protokół eFAST
ultrasonografia
FAST protocol
eFAST protocol
ultrasound
Opis:
W artykule przedstawiono procedurę badania ultrasonografi cznego FAST oraz eFAST.
The ultrasound examination procedure FAST and eFAST is presented in the article.
Źródło:
Inżynier i Fizyk Medyczny; 2019, 8, 3; 163-165
2300-1410
Pojawia się w:
Inżynier i Fizyk Medyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Konkurencyjność obiektów typu fast food w ocenie studentów SGGW
Autorzy:
Balińska, Agata
Powiązania:
https://bibliotekanauki.pl/articles/582655.pdf
Data publikacji:
2017
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
konkurencyjność
fast food
studenci
Opis:
Obiekty typu fast food są ważnym elementem rynku usług gastronomicznych. Odbiorcami ich ofert jest przede wszystkim młodzież. W artykule zaprezentowano wyniki badań ankietowych przeprowadzonych na próbie 273 studentów studiów stacjonarnych SGGW w 2016 r. Celem analiz było określenie podstaw konkurencyjności obiektów typu fast food. Z przeprowadzonych badań wynika, że respondenci korzystali z takich usług najczęściej do dwóch razy w miesiącu, przy czym w przypadku mężczyzn częstotliwość ta jest większa niż w przypadku kobiet. Największy wpływ na wybór obiektu gastronomicznego miał typ żywności oraz cena, najmniejszy – w ocenie respondentów − reklama. Równocześnie co czwarty respondent przyznał, że bardzo często korzysta z kuponów rabatowych. O konkurencyjności obiektów fast food, zdaniem respondentów, decydują czystość i dostępność miejsc siedzących, a na poprawę konkurencyjności może wpłynąć rozszerzenie oferty o owoce i śniadaniowe menu. Respondenci jakość obsługi ocenili nieco wyżej niż jakość oferowanych produktów. Odnotowano też różnicę w ocenie w zależności od częstotliwości korzystania z usług tych obiektów.
Źródło:
Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu; 2017, 475; 23-32
1899-3192
Pojawia się w:
Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Minor actinides impact on basic safety parameters of medium-sized sodium-cooled fast reactor
Autorzy:
Darnowski, P.
Uzunow, N.
Powiązania:
https://bibliotekanauki.pl/articles/147617.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
fast reactor safety
MCNP5
sodium-cooled fast reactor
nuclear waste transmutation
Opis:
An analysis of the infl uence of addition of minor actinides (MA) to the fast reactor fuel on the most important safety characteristics was performed. A special emphasis was given to the total control rods worth in order to describe qualitatively and quantitatively its change with MA content. All computations were performed with a homogeneous assembly model of modifi ed BN-600 sodium-cooled fast reactor core with 0, 3 and 6% of MA. A model was prepared for the Monte Carlo neutron transport code MCNP5 for fresh fuel in the beginning-oflife (BOL) state. Additionally, some other parameters, such as Doppler constant, sodium void reactivity, delayed neutron fraction, neutron fl uxes and neutron spectra distribution, were computed and their change with MA content was investigated. Study indicates that the total control rods worth (CRW) decreases with increasing MA inventory in the fuel and confi rms that the addition of MA has a negative effect on the delayed neutron fraction.
Źródło:
Nukleonika; 2015, 60, 1; 171-179
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena stabilności mikrobiologicznej żywności typu Fast food
Assessment of microbiological stability of fast food
Autorzy:
Steinka, I.
Powiązania:
https://bibliotekanauki.pl/articles/342363.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Wydawnictwo Uniwersytetu Morskiego w Gdyni
Tematy:
żywność Fast food
mikroorganizmy
przechowywanie
stabilność mikrobiologiczna
fast food
microorganisms
storage
microbiological stability
Opis:
Celem badań była ocena stabilności mikrobiologicznej wybranych produktów żywności typu Fast food. Badaniom poddano cztery wybrane produkty należących do zestawu dań dwóch sieci z terenu Trójmiasta. Oceniono liczbę Staphylococcus aureus, Enterococcus faecalis, drożdżaków oraz grzybów strzępkowych. Liczba i rodzaj identyfikowanych mikroorganizmów po przechowywaniu produktów potwierdziły brak prawidłowego nadzoru nad działaniami osób zatrudnionych w procesie przygotowywania żywności w analizowanych placówkach. Jeden z czterech badanych rodzajów produktów cechował się brakiem stabilności mikrobiologicznej, co wskazywało na niewłaściwe funkcjonowanie procedur higienicznych.
The aim of the study was to evaluate the microbiological stability of selected fast food products. Four products from two fast-food restaurant chains in the Tri-City area were selected for the analyses. The count of Staphylococcus aureus, Enterococcus faecalis, yeasts and filamentous fungi was assessed. After storage of the products, the count and type of identified microorganisms pointed to inadequate supervision of the activities of the staff responsible for food processing in the selected facilities. One of the four types of tested products was characterized by microbiological instability, indicating inadequate hygienic procedures.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Gdyni; 2017, 99; 48-55
1644-1818
2451-2486
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Gdyni
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance comparison of varistor models under high current derivative impulses
Autorzy:
Edirisinghe, M.
Montańo, R.
Cooray, V.
Roman, F.
Powiązania:
https://bibliotekanauki.pl/articles/412116.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
varistors
fast front current impulses
Opis:
Surge protective devices (SPD) testing procedures are mainly performed with standard current pulse types. However, none of these standard current waveforms reproduce the very fast rise time and the large peak current derivatives observed in subsequent return strokes. In the literature there are several mathematical models to represent metal oxide varistor that have been developed based on standard impulse conditions. These models are being used routinely in the analysis of the various electronic circuits under transient conditions. In this paper, a study was conducted to have a performance comparison between the two varistor models, simplified varistor model and Durbak's model, available in the literature under high current derivative impulses. The experiments and simulations were performed on disk type varistors with different diameter sizes, i.e., 20mm, 10mm, and 05mm with nominal operating voltage of 230 V. The Roman Generator developed at Uppsala University was used as the high current derivative impulse generator which can produce a peak current up to 1500 A with 10 ns rise time and its rate-of-rise is in the order of 1011 A/s. The results showed that for standard 8/20 ěs lightning impulses, simulation results of these models had a good agreement with the experimental data. However, these two models need to be improving in order to improve their performance under high current derivative impulses into the sub-microsecond range.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 6; 40-53
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Post − sprawiedliwość społeczna − zbawienie (Za 1−8)
Autorzy:
Witaszek, Gabriel
Powiązania:
https://bibliotekanauki.pl/articles/1177941.pdf
Data publikacji:
1997
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
post
zbawienie
sprawiedliwość
fast
salvation
fairness
Opis:
Il profeta Zaccaria che profetizza dopo il ritorno degli esiliati dalla Babilonia (538 a. C.) è aperto alla sintesi dei diversi pensieri religiosi, ciò fa sì che, il suo messaggio, faccia da modello all’odierna interpretazione della vita religiosa e sociale. L’autentica vita religiosa si esprime soprattutto nel rispettare le norme morali e non soltanto nell’osservare il digiuno senza la pratica della giustizia sociale. Il digiuno è il modo di entrare in relazione con Dio, però non serve a niente, se l’uomo rimane nei propri peccati. Il digiuno accompagnato da atteggiamenti ostili verso i membri piú deboli della società, è inutile. Perciò, il profeta invita il popolo eletto, alla pratica della giustizia sociale perchè da essa dipende il possesso della terra (la salvezza).
Źródło:
The Biblical Annals; 1997, 44, 1; 69-78
2083-2222
2451-2168
Pojawia się w:
The Biblical Annals
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A fast speech data files transmission by ASCII characters in-coding
Autorzy:
Pawełczyk, P.
Kostorz, I.
Powiązania:
https://bibliotekanauki.pl/articles/333067.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
szybka transmisja danych
data fast transmission
Opis:
This note shortly describes the system of a fast transmission of oral data files that are converted into ASCII characters. These files are using lower capacity the transmission capacity of the communication virtual data links.
Źródło:
Journal of Medical Informatics & Technologies; 2004, 8; II21-24
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neutron emission parameters from the collapse of the condensed Z-pinch
Autorzy:
Anan'ev, S. S.
Bakshaev, Y. L.
Bryzgunov, V. A.
Chernenko, A. S.
Dan'ko, S. A.
Kazakov, E. D.
Klír, D.
Korolev, V. D.
Smirnova, E. A.
Ustroev, G. I.
Vikhrev, V. V.
Powiązania:
https://bibliotekanauki.pl/articles/146662.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
neutrons
energy distribution
fast Z-pinch
Opis:
The parameters of neutron emission from the neck of the condensed Z-pinch, were measured at an S-300 installation (2 MA, 100 ns). Profiled loads with central parts made from microporous deuterated polyethylene (with a density of 100 mg/cm3) were used in the experiments. Neutron emission parameters were measured by the time-of-flight (TOF) method. Neutrons were registered using four flight bases with 10 scintillation detectors which were placed at two axial and two radial directions. It was found that the mean neutron energy, determined by the TOF method, turned out to be anisotropic. The average energy of neutrons emitted along the axis towards the cathode, was shifted to higher energy (2.6-2.8 MeV) and the average energy of neutrons emitted towards the anode, was shifted to lower energy (2.1-2.3 MeV) compared to the d-d reaction neutron energy 2.45 MeV. The average energy of neutrons, emitted in two opposite radial directions, was close to 2.45 MeV. The half-width of the energy distributions reconstructed for all directions was 400-500 keV. The analysis of the experimental results demonstrated that the found phenomena could be explained by a slowly decaying high energy tail in the energy distribution of colliding deuterons. The maximal neutron yield was of 6 x 109.
Źródło:
Nukleonika; 2012, 57, 3; 333-336
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deblurring approach for motion camera combining FFT with α-confidence goal optimization
Autorzy:
Huang, Lve
Wu, Lushen
Xiao, Wenyan
Peng, Qingjin
Powiązania:
https://bibliotekanauki.pl/articles/174045.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
image deblurring
fast motion camera
confidence goal optimization
fast Fourier transform
high-railway defect detection
Opis:
Sharp images ensure success in the object detection and recognition from state-of-art deep learning methods. When there is a fast relative motion between the camera and the object being imaged during exposure, it will necessarily result in blurred images. To deblur the images acquired under the camera motion for high-quality images, a deblurring approach with relatively simple calculation is proposed. An accurate estimation method of point spread function is firstly developed by performing the Fourier transform twice. Artifacts caused by image direct deconvolution are then reduced by predicting the image boundary region, and the deconvolution model is optimized by an α-confidence statistics algorithm based on the greyscale consistency of the image adjacent columns. The proposed deblurring approach is finally carried out on both the synthetic-blurred images and the real-scene images. The experiment results demonstrate that the proposed image deblurring approach outperforms the existing methods for the images that are seriously blurred in direction motion.
Źródło:
Optica Applicata; 2020, 50, 2; 185-198
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A portable fast neutron radiography system for non-destructive analysis of composite materials
Autorzy:
Kam, Erol
Reyhancan, Iskender A.
Biyik, Recep
Powiązania:
https://bibliotekanauki.pl/articles/148503.pdf
Data publikacji:
2019
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
fast neutron
radiography
scintillator
recoil protons
Opis:
Depending on the neutron energy used, neutron radiography can be generally categorized as fast and thermal neutron radiography. Fast neutron radiography (FNR) with neutron energy more than 1 MeV opens up a new range of possibilities for a non-destructive examination when the inspected object is thick or dense. Other traditional techniques, such as X-ray, gamma ray and thermal neutron radiography, do not meet penetration capabilities of FNR in this area. Because of these distinctive features, this technique is used in different industrial applications such as security (cargo investigation for contraband such as narcotics, explosives and illicit drugs), gas/liquid fl ow and mixing and radiography and tomography of encapsulated heavy shielded low Z compound materials. The FNR images are produced directly during exposure as neutrons create recoil protons, which activate a scintillator screen, allowing images to be collected with a computer-controlled charge-coupled device camera. Finally, the picture can be saved on a computer for image processing. The aim of this research was to set up a portable FN R system and to test it for use in non-destructive testing of different composite materials. Experiments were carried out by using a fast portative neutron generator Thermo Scientific MP 320.
Źródło:
Nukleonika; 2019, 64, 3; 97-101
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fast FCM with spatial neighborhood information for brain MR image segmentation
Autorzy:
Biniaz, A.
Abbasi, A.
Powiązania:
https://bibliotekanauki.pl/articles/91616.pdf
Data publikacji:
2013
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
Fuzzy c-Means clustering
FCM
Fast FCM
FFCM
spatial Fast FCM
sFFCM
MR image
noise interference
Opis:
Among different segmentation approaches Fuzzy c-Means clustering (FCM) is a welldeveloped algorithm for medical image segmentation. In emergency medical applications quick convergence of FCM is necessary. On the other hand spatial information is seldom exploited in standard FCM; therefore nuisance factors can simply affect it and cause misclassification. This paper aims to introduce a Fast FCM (FFCM) technique by incorporation of spatial neighborhood information which is exploited by a linear function on fuzzy membership. Applying proposed spatial Fast FCM (sFFCM), elapsed time is decreased and neighborhood spatial information is exploited in FFCM. Moreover, iteration numbers by proposed FFCM/sFFCM techniques are decreased efficiently. The FCM/FFCM techniques are examined on both simulated and real MR images. Furthermore, to considerably decrease of convergence time and iterations number, cluster centroids are initialized by an algorithm. Accuracy of the new approach is same as standard FCM. The quantitative assessments of presented FCM/FFCM techniques are evaluated by conventional validity functions. Experimental results demonstrate that sFFCM techniques efficiently handle noise interference and significantly decrease elapsed time.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2013, 3, 1; 15-25
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High Performance DIF-FFT Using Dissimilar Partitioned LUT Based Distributed Arithmetic
Autorzy:
Cheepurupalli, Kusma Kumari
Charan, Muntha
Rao, Jammu Bhaskara
Noor, Mahammad S.
Powiązania:
https://bibliotekanauki.pl/articles/2055270.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fast Fourier transform
adders
distributed arithmetic
DSP
Opis:
Real-time data processing systems utilize Digital Signal Processing (DSP) functions as the base modules. Most of the DSP functions involve the implementation of Fast Fourier Transform (FFT) to convert the signals from one domain to another domain. The major bottleneck of Decimation in frequency - Fast Fourier Transform (DIF-FFT) implementation lies in using a number of Multipliers. Distributed arithmetic (DA) is considered as one of the efficient techniques to implement DIF-FFT. In this approach, the multipliers are not used. The proposed technique exploits the very advantage of the look-up table by storing the Twiddle factors, thereby avoiding the multipliers required in the butterfly structure. DIF-FFT using Distributed Arithmetic (DIF-FFT DA) models, with different adders such as Ripple carry adder (RCA), Carry-lookahead adder (CLA), and Sklansky prefix graph adder, are proposed in this paper. The three proposed models are synthesized using Cadence 6.1 EDA tools with a 45nm CMOS technology. Compared to the traditional method, it is observed that the area is improved by 53.11%, 53.35%, and 50.15%, power is improved by 42.31%, 42.52%, and 40.39%, and delay is improved by 45.26%, 45.42%, 41.80%, respectively.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 4; 631--637
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ szybkozmiennego przepływu cieczy przez złoże na hydrodynamikę reaktora trójfazowego
Impact of the fast changing liquid flow through a bed on the trickle bed reactor hydrodynamics
Autorzy:
Gancarczyk, A.
Bartelmus, G.
Powiązania:
https://bibliotekanauki.pl/articles/306173.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Inżynierii Chemicznej PAN
Tematy:
proces przemysłowy
reżim hydrodynamiczny
reżim LIPF FAST
Opis:
Przedmiotem Pracy Było Określenie Wpływu Periodycznie Zmienianego Przepływu Cieczy Przez Złoże Na Parametry Hydrodynamiczne Reaktora Trójfazowego Ze Stałym Złożem. Badania Wykonano W Kolumnie Pracującej W Reżimie Lipf Fast. Przeanalizowano Wpływ Takiego Sposobu Pracy Aparatu Na Wartości Zawieszenia Cieczowego, Spadku Ciśnienia Gazu W Złożu Oraz Położenie Linii Zmiany Reżimów Hydrodynamicznych Csw/Lipf Fast.
The aim of the present study was to determine the effect of the periodic liquid feeding of the bed of a trickle bed reactor on the values of its hydrodynamic parameters . The measurements were performed for the LIPF FAST regime. The effect of the tested reactor operation manner on the liquid holdup, pressure drop and position of the CSW/LIPF FAST transition line was analyzed.
Źródło:
Prace Naukowe Instytutu Inżynierii Chemicznej Polskiej Akademii Nauk; 2011, 15; 73-92
1509-0760
Pojawia się w:
Prace Naukowe Instytutu Inżynierii Chemicznej Polskiej Akademii Nauk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the nature of changes in the optical characterization produced in sapphire on its irradiation with a pulsed powerful stream of hydrogen ions
Autorzy:
Gribkov, V.
Ivanov, L.
Maslyaev, S.
Pimenov, V.
Sadowski, M.
Skladnik-Sadowska, E.
Banaszak, A.
Kopeć, G.
Cheblukov, Y.
Kozodaev, M. A.
Suvorov, A. L.
Smirnov, I. S.
Powiązania:
https://bibliotekanauki.pl/articles/147991.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
optical characteristics
irradiation
fast ion stream
morphology
Opis:
Changes in the optical characteristics in synthetic sapphire specimens produced by microsecond pulse irradiation with a stream of hydrogen ions of energies ranging up to tens keV have been observed. Data on decrease in the optical reflection, measured within the wavelength range of 200 900 nm, are presented. This characterization is compared with the data received by optical and atomic force microscopy as well as by lattice structure analysis performed with X-rays. The measurements indicate that the changes of optical parameters are not a consequence of absorption increase and/or sapphire decomposition. They result from modifications of the morphology and structure of surface layer of the sapphire samples, induced by irradiation.
Źródło:
Nukleonika; 2004, 49, 2; 43-49
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Refined design of a new driver for fast capillary discharge
Autorzy:
Koláček, K.
Boháček, V.
Šunka, P.
Řípa, M.
Kravárik, J.
Powiązania:
https://bibliotekanauki.pl/articles/148339.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
fast capillary discharge
soft X-ray laser
Opis:
A new driver of the fast capillary discharge has been designed. It consists of the Marx generator and radial Blumline pulse forming line. Such a geometry enables axial access to both capillary ends (”transparent capillary”). This arrangement substantially simplifies the experiments (adjustment, monitoring, applications). The designed apparatus is capable of reaching the discharge current of the order of 120 kA and the discharge current rise time 2.9×1012 A/s, which is sufficient for the investigation of amplification in non-traditional electronic transitions.
Źródło:
Nukleonika; 2001, 46, suppl. 1; 45-47
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Refined design of a new driver for fast capillary discharge
Autorzy:
Kolácek, K.
Bohacek, V.
Schmidt, J.
Sunka, P.
Ripa, M.
Kravárik, J.
Powiązania:
https://bibliotekanauki.pl/articles/147571.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
fast capillary discharge
soft X-ray laser
Opis:
A new driver of the fast capillary discharge has been designed. It consists of the Marx generator and radial Blumline pulse forming line. Such a geometry enables axial access to both capillary ends ("transparent capillary"). This arrangement substantially simplifies the experiments (adjustment, monitoring, applications). The designed apparatus is capable of reaching the discharge current of the order of 120 kA and the discharge current rise time 2.9×1012 A/s, which is sufficient for the investigation of amplification in non-traditional electronic transitions.
Źródło:
Nukleonika; 2001, 46, 3; 117-120
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie sprzętowych implementacji dwóch popularnych detektorów cech punktowych
Comparison of hardware implementations of two popular corner detectors
Autorzy:
Kraft, M.
Fularz, M.
Powiązania:
https://bibliotekanauki.pl/articles/153965.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
FPGA
detektor narożników
Harris
FAST
corner detector
Opis:
W artykule zaprezentowano sprzętowe implementacje dwóch detektorów narożników - detektora Harrisa i detektora FAST - w strukturach FPGA. Prędkość przetwarzania nie ustępuje prędkości uzyskiwanej na współczesnych komputerach osobistych, jednakże zastosowanie niedrogich układów FPGA umożliwia ograniczenie poboru mocy, a także kosztu oraz wymiarów kompletnego systemu. W artykule zawarto opis obu algorytmów, schematy blokowe ich sprzętowych implementacji, a także podsumowanie i porównanie ilości zasobów układu FPGA wykorzystywanych przez obie implementacje. Wykonano również wstępną analizę wyników uzyskanych przez zastosowanie zaimplementowanych detektorów na sekwencji obrazów.
Many contemporary computer and machine vision applications require finding corresponding points in image sequences. For that purpose many point feature detectors have been developed. Most of them detect corners, i.e. points that mark object boundaries, or boundaries of significant object parts as features. In this paper there are presented the implementations of two popular corner detectors - the Harris [2] and FAST [3] corner detector - in FPGA structure. The proposed solutions enable processing of 512x512 pixel, 8-bit grayscale image data with the speed of over 400 frames per second (FAST), and over 350 frames per second (Harris). The processing speeds are the same or even better than those that can be achieved using modern high-performance PCs. FPGA implementations, however, are less power-hungry, relatively inexpensive and more compact, which is critical in many applications. Our implementations are targeted at applications in mobile robotics. The paper contains a short description of the implemented algorithms, block diagrams of the implemented architectures, as well as the summary of the FPGA resources required by both implementations. A preliminary analysis of performance of the implemented algorithms with regards to feature repeatability is also carried out. The results show that the implementation of the FAST algorithm has better performance in terms of speed. Also, the FAST algorithm performs better on image sequences with strong structure - urban, interiors etc. The Harris detector implementation, although in general slower and a little more resource-hungry than the FAST implementation (requires hardware multipliers), demonstrates better performance on poorly structured scene sequences - grass, dirt roads etc. These conclusions are consistent with the results of research carried out before [3, 4].
Źródło:
Pomiary Automatyka Kontrola; 2009, R. 55, nr 8, 8; 618-620
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adaptive synthesis of a wavelet transform using fast neural network
Autorzy:
Stolarek, J.
Powiązania:
https://bibliotekanauki.pl/articles/202390.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wavelets
neural networks
filter parametrization
fast algorithms
Opis:
This paper introduces a new method for an adaptive synthesis of a wavelet transform using a fast neural network with a topology based on the lattice structure. The lattice structure and the orthogonal lattice structure are presented and their properties are discussed. A novel method for unsupervised training of the neural network is introduced. The proposed approach is tested by synthesizing new wavelets with an expected energy distribution between low- and high-pass filters. Energy compaction of the proposed method and Daubechies wavelets is compared. Tests are performed using sound and image signals.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 1; 9-13
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication and geometric characterization of highly-ordered hexagonally arranged arrays of nanoporous anodic alumina
Autorzy:
Stępniowski, W. J.
Nowak-Stępniowska, A.
Michalska-Domańska, M.
Norek, M.
Czujko, T.
Bojar, Z.
Powiązania:
https://bibliotekanauki.pl/articles/779908.pdf
Data publikacji:
2014
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
nanopores
anodization
self-organization
fast Fourier transform
Opis:
Anodic aluminum oxide (AAO) has been fabricated in the 0.3 M oxalic acid at voltage range 20-60 V and temperature range of 35-50oC. The resulting nanoporous alumina surfaces were characterized by high resolution scanning electron microscopy, and the images were quantitatively analysed by means of an innovative approach based on fast Fourier transform. The influence of operating anodization voltage and electrolyte temperature on nanopores geometry (pore diameter, interpore distance, porosity, pores density) and arrangement has been studied in details and compared to literature data and theoretical calculations. It was found that independently from the temperature, the best arrangement of the nanopores is for anodic aluminum oxide formed at voltages ranging from 40 to 50 V. Moreover, it was found that pore diameter and interpore distance increase linearly with voltage, what is in line with the literature data.
Źródło:
Polish Journal of Chemical Technology; 2014, 16, 1; 63-69
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Copyright – an Ally for Fashion in the Intellectual Property Rights System?
Autorzy:
Jankowska, Marlena
Powiązania:
https://bibliotekanauki.pl/articles/2172252.pdf
Data publikacji:
2020-12-16
Wydawca:
Polska Akademia Nauk. Instytut Nauk Prawnych PAN
Tematy:
fashion law
copyrightability
fast fashion
fashion design
Opis:
In the Internet society, we are accustomed to the originators of creative works asserting strong protection of their output. Similarly, we witness extremely casual appropriation of works that is easier than ever to discover. Fashion products are an interesting case in this regard – through the relatively short history of the industry, protection of works has tended to be quite loose. Until recently, the consequences of copying in the fashion sector were not particularly serious, but the emergence of the connected society and the increased speed and scale of this copying threaten to cause more noticeable damage. The awareness that new threats call for a more serious approach to protection of creations requires examination of how and whether the familiar principles of copyright law can be applied to fashion designs and products, and to what extent. This paper outlines the background to such protections in the fashion industry, including examples of both strong and relaxed approaches by industry players. There is a brief presentation of case law that demonstrates how copyright principles can be applied to fashion, while also noting the role of society in applying the norms that determine the extent to which laws, once written, can actually be applied.
Źródło:
Contemporary Central and East European Law; 2019, 1 (133); 64-74
0070-7325
Pojawia się w:
Contemporary Central and East European Law
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on fast electron transport in the context of fast ignition
Autorzy:
Batani, D.
Powiązania:
https://bibliotekanauki.pl/articles/146597.pdf
Data publikacji:
2011
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
inertial confinement fusion (ICF)
fast ignition (FI)
fast electrons
ultra-high-intensity lasers
relativistic laser-plasma interaction
Opis:
This paper deals with the problem of fast electron propagation in plasmas, in the context of the fast ignition (FI) approach to inertial confinement fusion (ICF). In FI, a short-pulse high-intensity laser beam should generate a beam of relativistic electrons, which propagate into the compressed pellet, depositing energy and igniting the fuel. The study of electron propagation in dense matter is hence essential to the success of this scheme. The propagation of relativistic electrons in dense matter is determined by collisions of fast electrons with ions and electrons in the material, which can be described in terms of stopping power, but it also depends on self-generated magnetic and electric fields, which play a major, or even dominant role. In this paper we will show the importance of such collective effects by discussing several experimental examples.
Źródło:
Nukleonika; 2011, 56, 2; 99-106
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and implementation of programmable ultrafast circuit breaker with solid state relay
Autorzy:
Omotayo, Mayowa Emmanuel
Olawuni, Adeolu
Powiązania:
https://bibliotekanauki.pl/articles/1192022.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Ultra Fast
MCB
8051 Microcontroller
Overload
Mosfet
Opis:
The concept of electronic circuit breaker came into focus realizing that conventional circuit breakers such as MCBs take longer time to trip. Therefore, for sensitive loads it is very important to activate the tripping mechanism at the shortest possible time, preferably instantaneously. This project is demonstrates fast tripping mechanism as against the slow one like MCB. Electronic circuit breaker is based on the voltage drop across a series element proportional to the load current, typically a low value resistor. This voltage is sensed and rectified to DC which is and then compared with a preset voltage by a level comparator to generate an output that drives a relay through a MOSFET to trip the load. The unit is extremely fast and overcomes the drawback of the thermal type. It uses a microcontroller from 8051 family. The project was designed to shut down the power supply when it is overloaded. Conventional circuit breaker like MCB based is on thermal bimetal lever trip mechanism. It is very slow and the trip time is dependent upon the percentage of overload. This project senses the current passing through a series element and the corresponding voltage drop is compared against the preset voltage proportional to the current by a level comparator to generate an output for the load to trip.
Źródło:
World Scientific News; 2016, 50; 148-159
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Classification of Seizure Types Using Random Forest Classifier
Autorzy:
Basri, Ashjan
Arif, Muhammad
Powiązania:
https://bibliotekanauki.pl/articles/2123290.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
EEG
fast fourier transform
seizure
random forest
Opis:
Epilepsy is one of the most common mental disorders in the world, affecting 65 million people. The prevalence in Arab countries of Epilepsy is estimated at 174 per 100,000 individuals, and in Saudi Arabia is 6.54 per 1,000 individuals. Epilepsy seizures have different types, and each patient needs to have a treatment plan according to the seizure type. Hence, accurate classification of seizure type is an essential part of diagnosing and treating epileptic patients. In this paper, features based on fast Fourier transform from EEG montages are used to classify different types of seizures. Since the distribution of classes is not uniform and the dataset suffers from severe imbalance. Various algorithms are used to under-sample the majority class and over-sample the minority classes. Random forest classifier produced classification accuracy of 96% to differentiate three types of seizures from the healthy EEG reading.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 3; 167--178
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Programowanie sanacji przestrzeni wiejskiej. Autorskie mechanizmy planistyczne na rzecz zrównoważonego kształtowania obszarów wiejskich
Programming of rural space sanation. Author planning mechanisms for sustainable shaping of rural areas
Autorzy:
Barełkowski, Robert
Wojtyra, Bartosz
Powiązania:
https://bibliotekanauki.pl/articles/650949.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
planowanie przestrzenne
obszary wiejskie
strategiczne rezerwy inwestycyjne
metoda FAST
spatial planning
rural areas
strategic investment resources
FAST method
Opis:
In the first part of the paper, the authors diagnose problems of spatial planning process in Poland being the result of the implementation of effective law. They identify how practice affected by this law generates land use conditions in the rural space. Common situation is that there is apparent lack of integration of planning and strategic documents affecting spatial policies within one territorial unit (commune) and their execution. This deficiency along with inefficient regulations are exploited and in conjunction with other phenomena like increased and uncontrolled development pressure (e.g. by property owners), particularization of prioritization in issuing administrative decisions related to land use, predatory economy of agricultural land, produce unsatisfactory qualities of the built environment. Also, social participation in spatial planning system is often limited and doesn’t meet specific objectives. In the second part, the authors use case studies in order to propose the method applied, as a part of research and related experiment, to the planning process. This study is immersed in particular, practical experience. The method encompasses: scenario-based approach (as part of the P.R.S. method), monitoring and evaluation of spatial policy in communes, introduction of multi-criteria analyses. These mechanisms allow for allowing to identify and understand the conditions and background of activities for spatial policy and aim to improve planning documents. In the summary, the authors construct a list of recommendations regarding programming of rural development planning. They emphasize the need for a stronger integration of spatial regulation on different levels of management of planning process. They postulate to amplify the integration of planning documents even if it means some degree of reorientation of initially stipulated hierarchy. One of key issues is the introduction of constant and continuous monitoring of spatial policy, preceding decision-making. The solution could be seen as a multi-criteria assessment of spatial conditions and directions, development studies should be based on. Public participation is depicted also as integrated and permeate community share in decision-making focused on clearly defined objectives, countering the conflicts arising from particularism of inhabitants. Authors attempt to define their interpretation of holistic approach to planning studies and documents using broad perspective, with recognition of necessity to acknowledge the uniqueness of every area or site, resulting in respecting different characteristics by relevant establishing of different planning objectives.
W pierwszej części artykułu autorzy diagnozują problemy procesu planowania przestrzennego w Polsce wynikające z obowiązującego systemu prawnego oraz identyfikują ich efekty w przestrzeni wiejskiej. W drugiej części skupiają się na prezentacji trzech wątków badawczych, stanowiących propozycję aplikacyjnych metod wdrażanych eksperymentalnie do procesu planistycznego, bazując na doświadczeniach praktycznych. W podsumowaniu konstruują listę rekomendacji dotyczących programowania sanacji zagospodarowania obszarów wiejskich.
Źródło:
Acta Universitatis Lodziensis. Folia Geographica Socio-Oeconomica; 2018, 32
1508-1117
2353-4826
Pojawia się w:
Acta Universitatis Lodziensis. Folia Geographica Socio-Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Key-point Detection based Fast CU Decision for HEVC Intra Encoding
Autorzy:
Xu, Z.
Min, B.
Cheung, R. C. C.
Powiązania:
https://bibliotekanauki.pl/articles/226128.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
HEVC
video coding
fast CU decision
corner detection
Opis:
As the most recent video coding standard, High Efficiency Video Coding (HEVC) adopts various novel techniques, including a quad-tree based coding unit (CU) structure and additional angular modes used for intra encoding. These new techniques achieve a notable improvement in coding efficiency at the penalty of significant computational complexity increase. Thus, a fast HEVC coding algorithm is highly desirable. In this paper, we propose a fast intra CU decision algorithm for HEVC to reduce the coding complexity, mainly based on a key-point detection. A CU block is considered to have multiple gradients and is early split if corner points are detected inside the block. On the other hand, a CU block without corner points is treated to be terminated when its RD cost is also small according to statistics of the previous frames. The proposed fast algorithm achieves over 62% encoding time reduction with 3.66%, 2.82%, and 2.53% BD-Rate loss for Y, U, and V components, averagely. The experimental results show that the proposed method is efficient to fast decide CU size in HEVC intra coding, even though only static parameters are applied to all test sequences.
Źródło:
International Journal of Electronics and Telecommunications; 2018, 64, 3; 321-327
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kulinarny trend slow food fast a nazwy własne stacjonarnych i mobilnych barów szybkiej obsługi (tzw. food trucków)
The culinary trend of slow food fast and the proper names of stationary and mobile fast food bars
Autorzy:
Szkudlarek-Śmiechowicz, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/594104.pdf
Data publikacji:
2016
Wydawca:
Łódzkie Towarzystwo Naukowe
Tematy:
onomastyka
nazwy własne
nazwy marketingowe
trend slow food fast
onomastics
proper names
marketing names
trend of slow food fast
Opis:
Food trucki są niezwykle popularnymi wśród młodych ludzi miejscami, gdzie nie tylko się je, ale także kształtuje i podtrzymuje z jednej strony poczucie indywidualizmu, z drugiej – przynależności do określonej grupy. Moda na food trucki łączy się bowiem z kulturowym trendem slow. W polskim, przede wszystkim internetowym dyskursie kulinarnym wyrażenie food truck ma szereg bliskoznacznych określeń: jadłowóz, jadłodajnia, bar/knajpka na (czterech) kółkach, samochód/ciężarówka z jedzeniem, uliczne żywienie, mobilna gastronomia, gastronomiczny punkt obsługi, ruchomy punkt gastronomiczny. Niezwykle interesująco kształtują się nazwy własne barów, będące pierwszym i zarazem najważniejszym komunikatem wysyłanym przez nadawcę (właściciela baru) do potencjalnych klientów poszukujących nie tylko niedrogiego i zdrowego jedzenia, ale także kierujących się szczególnymi potrzebami intelektualno-estetycznymi. Nazwy modnych mobilnych i stacjonarnych barów nie pełnią jedynie funkcji identyfikującej, ale także autoprezentacyjną, informacyjną, perswazyjną, ludyczną, kreatywną, wskazują na pewne wartości i styl życia.
Food trucks are very popular among young people. Those are places not only to eat, but also to create and maintain both, a sense of individualism, and a sense of belonging to a particular group. The fashion for food trucks, in fact, converges with the cultural trend of slow. In the Polish culinary discourse, primarily online discourse, the expression food truck has a number of synonymous terms: jadłowóz, jadłodajnia, bar/knajpkana (czterech) kółkach, samochód/ ciężarówka z jedzeniem, uliczne żywienie, mobilna gastronomia, gastronomiczny punkt obsługi, ruchomy punkt gastronomiczny. Extremely interesting, however, is the creation of bar names, which are the first and also the most important messages sent by the sender (the bar owner) to prospective customers who are looking not only for inexpensive and healthy food, but who are also driven by particular intellectual and aesthetic needs. The names of trendy mobile and stationary bars serve not only identifying function, but also self-presentational, informative, persuasive, ludic, or creative functions, indicating certain values and lifestyles at the same time.
Źródło:
Rozprawy Komisji Językowej ŁTN; 2016, 62; 167-181
0076-0390
Pojawia się w:
Rozprawy Komisji Językowej ŁTN
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On implementation of FFT processor in XILINX FPGA using high-level synthesis
Autorzy:
Smyk, Robert
Czyżak, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/377926.pdf
Data publikacji:
2020
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
Fast Fourier Transform Processor
FPGA
high-level synthesis
Opis:
The paper presents results of the high level synthesis of an 1024-point radix-2 FFT processors in Xilinx Vivado FPGA environment. The use of various directives controlling the synthesis process is examined. The results indicate that using the proper set of directives the latency of the processor can be reduced by 95% from about 35k for the default parameters to 1.5k cycles after optimizations.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2020, 104; 17-33
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Created customer value by different trade formats of fast-moving consumer goods in Poland and Ukraine
Autorzy:
Sobczyk, Genowefa
Krykavskyy, Yevhen
Hlynskyy, Nazar
Powiązania:
https://bibliotekanauki.pl/articles/957565.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
customer value
retail formats
fast-moving consumer goods
Opis:
Theoretical background: The main components of costumer value are the product, brand and image, personnel relationships and service activities, and offer availability. In retail, the important attributes of the products on sale are their range, price and terms of sale, relevant proximity and the benefit of obtaining, which includes spatial accessibility, emotional offer and time value. Modern trade solutions have created a wide range of opportunities for the client to facilitate access to the product offer through the introduction of various trading formats. The trade format should be understood as various concepts of retail outlet activity, which includes the formation of their infrastructure, immediate environment and the organisation of the sale of goods.Purpose of the article: The goal of the article is to classify the factors that create customer value using various formats of retail trade in consumer goods in the Ukrainian and Polish markets.Research methods: The following methods were used in this research: the abstract and logical method was used for generalising the theory and formulating conclusions; secondary research and survey were used for identifying the trends and patterns of efficiency in the studied factors; and the graphical method was used for visualising the results of the research.Main findings: In certain formats of sales points, the value for the customers is the breadth of the choice of goods and their quality, location and speed of purchase, the benefits arising from the level of prices and promotions, the service level and the general climate of the time offered by a store. The availability and possibility of goods choice has formed certain trends and customer habits among the buyers of consumer goods who are showing a preference for large purchases in hypermarkets and discount stores, supplementing purchases in specialised stores and only infrequently (in the Polish version) in markets/bazaars.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio H – Oeconomia; 2019, 53, 2; 79-88
0459-9586
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio H – Oeconomia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tramwaj szybki - modernizacja tramwaju tradycyjnego
Fast tramwaj - modernisation of tradional tramwaj
Autorzy:
Gocek, A.
Powiązania:
https://bibliotekanauki.pl/articles/252006.pdf
Data publikacji:
2011
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
szybki tramwaj
transport szynowy
fast tramway
rail transport
Opis:
W ostatnich dziesięcioleciach nastąpił znaczący rozwój transportu samochodowego, samochód stał się ogólnodostępnym i wygodnym środkiem transportu. Jednak zwiększenie liczby samochodów powoduje duże utrudnienia w poruszaniu się po centrach miast, a problemy w podróżowaniu można zaobserwować w zdecydowanej większości miast Europy. Powstające w ten sposób zaburzenia ruchu dotykają także komunikację miejską. W takich sytuacjach dostępnym środkiem transportu staje się komunikacja zbiorowa, która zapewnia: stosunkowo szybką podróż, jest łatwo dostępna dla pasażerów oraz umożliwia zadowalającą wygodę podróżowania.
Źródło:
TTS Technika Transportu Szynowego; 2011, 1-2; 45-48
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Approximation of random sums of random variables in insurance
Autorzy:
Wlaź, P.
Powiązania:
https://bibliotekanauki.pl/articles/102826.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
random sum
fast Fourier transform
shifted gamma distribution
Opis:
The paper deals with approximations of random sums. By random sum we mean a sum of random number of independent and identically distributed random variables. Distribution of this sum is called a compound distribution. The model is especially important in non-life insurance. There are many methods for approximating compound distributions, one of the most popular one is approximation with shifted gamma distribution. In this work we show an alternative way – using kernel density, Fast Fourier Transform and numerical optimization methods – for finding shifted gamma approximations and show results suggesting its superiority over classical method.
Źródło:
Advances in Science and Technology. Research Journal; 2014, 8, 23; 88-93
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing of Technical Fabrics under Fast Camera Control
Autorzy:
Kłosowski, Paweł
Michałowska, Krystyna
Przyborski, Marek
Jurczak, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/2201881.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
textile fabric
strength tests
rapid phenomenon
fast camera
Opis:
The dynamic development of measurement and recording techniques has been changing the way one conceives material strength. In this study, two different methods of evaluating the strength of fabrics are compared. The first is the typical and commonly used technique based on the use of a testing machine. The second method uses the so-called “fast camera” to monitor the entire process of the destruction of a fabric sample and analyse the behaviour of the fabric during the experiment. Both methods provide interesting data and present a very specific way of experimentally evaluating the strength of fabrics.
Źródło:
Advances in Science and Technology. Research Journal; 2023, 17, 1; 332--334
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hold-Fast Organs of Piscean and Avian Cestode Parasites with Special Emphasis on Histopathology
Autorzy:
Bhure, Dhanraj Balbhim
Nanware, Sanjay Shamrao
Powiązania:
https://bibliotekanauki.pl/articles/1191364.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Histopathology
Hold-fast organs
Maharashtra
Piscean and Avian Cestodes
Opis:
Present study deals with hold-fast organs and pathological changes induced by certain Piscean and avian Cestode parasites collected from Maharashtra State India. Hold-fast organs of tapeworms are important for attachment and adhesion. These organs of attachment are in the form of muscular suckers, rostellum, spines, hooks, tentacles etc. The work on hold-fast organs of Piscean and avian cestode parasites is essential for research in taxonomy and histopathology. Hence, the present study was undertaken on the role and status of diversity of holdfast organs with special reference to histopathology of Piscean and avian cestodes collected from Maharashtra State, India. Cestode parasites were collected and studied from certain fishes and birds from different localities of Maharashtra.
Źródło:
World Scientific News; 2016, 34; 109-120
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Investigations of Motion of Slide of Selected Pistol Types
Autorzy:
Fikus, B.
Koperski, W.
Płatek, P.
Surma, Z.
Trębiński, J.
Powiązania:
https://bibliotekanauki.pl/articles/403494.pdf
Data publikacji:
2016
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
mechanics
pistol slide motion
fast camera measurements
experimental investigations
Opis:
In the presented paper, kinematic characteristics of movable parts of investigated pistols have been experimentally determined with application of high speed camera and appropriate software TEMA motion. Results of measurements can be useful in validation of various theoretical models and can reveal the influence of some technical solutions on parameters of motion of selected parts. Obtained curves presenting dependence of slide velocity versus time, allowed for rough estimation of average value of interaction force between slide and frame of the investigated construction. The results of study highlights advantage of HK USP pistol design. The achieved results are from reduction of the value of the mentioned interaction force (approximately 50%) due to elongation of the most intensive phase of slide motion damping process.
Źródło:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2016, 7, 4 (26); 23-32
2081-5891
Pojawia się w:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of Neurotransmitter Transport in a Presynaptic Bouton of a Neuron
Autorzy:
Siwek, Bartlomiej
Powiązania:
https://bibliotekanauki.pl/articles/1373424.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
numeric simulation
Galerkin method
fast transport
neurotransmitter
presynaptic button
Opis:
In this paper the results of numerical simulation of neurotransmitter fast transport in a presynaptic bouton of a biological neuron are presented. A mathematical model governing the transport that is fully described in [2] is recalled. A numerical simulation scheme, used parameters and their origins are described. Finally, the results of the simulation are presented.
Źródło:
Schedae Informaticae; 2010, 19; 9-22
0860-0295
2083-8476
Pojawia się w:
Schedae Informaticae
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:
The possibility of diagnosis EGR systems defects by vibration analysis
Autorzy:
Kaźmierczak, A.
Wróbel, R.
Powiązania:
https://bibliotekanauki.pl/articles/244781.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
EGR system
fast Fourier transform
automotive diagnosis
vibroacustic analysis
Opis:
The Exhaust Gas Recirculation is a popular system of recirculation of the automotive vehicle emission. The principle of working depends on the forcing in the part of outlet gas to the combustion chamber. Majority of the users of automotive vehicles with EGR systems claim that system has negative effect on the performance of the car. Nonetheless, that opinion is subjective, because the generally available research on the subject does not exist. However, EGR system, as the most of automotive vehicle is being subjected to physic's rules - it uses up. The polluted flowing valve of circuit has an influence on stability of engine's work, and what follows on a performance of a car. The authors present a new in - vitro way of diagnosis in automotive vehicle, which depend on detection and measure of vibroacustic vibrations of the diesel engine. It seems that EGR circuit that does not work properly should not have an influence on vibrations generated by an engine. However, authors indicate that this statement is wrong. EGR system has an influence on engine's vibration, what was described in the article. On that way, detection of vibrations must be accomplished with high quality diagnostic systems. Therefore, vibrometric laser scanner Polytec had been used. To achieve full diagnostic results multidimensional vibration's function has been researched, where the torque moment has been used as an extra parameter. Measured vibrations were subjected to digital signal processing like windowing, fast Fourier transform, filtration by finite impulse response. The results of measure and processing perform in form of 3D plots, which indulge in speed estimate of the usefulness of presented method. Moreover authors presents principle of working EGRs' systems of different generations and its evolution.
Źródło:
Journal of KONES; 2008, 15, 4; 217-225
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On and Off Chip Capacitor Free, Fast Response, Low Drop-out Voltage Regulator
Autorzy:
Prasad, Guru
Shama, Kumara
Powiązania:
https://bibliotekanauki.pl/articles/955942.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
voltage regulator
capacitor free LDO
fast response
area efficient
Opis:
A low drop-out [LDO] voltage regulator with fast transient response which does not require capacitor for proper operation is proposed in this paper. Recent cap-less LDOs do not use off chip capacitor but instead they use on chip capacitor which occupy large area on chip. In the proposed LDO this on chip capacitor is also avoided. A novel secondary local feed-back technique is introduced which helps to achieve a good transient response even in the absence of output capacitor. Further a self compensating error amplifier is selected to eliminate the need of compensating capacitor. Stability analysis shows that the proposed LDO is stable with a phase margin of 78 0. The proposed LDO is laid out using Cadence spectre in 180 nm standard CMOS technology. Post layout simulation is carried out and LDO gives 6mV/V and 360μV /mA line and load regulation respectively. An undershoot of 120 mV is observed during the load transition from 0 mA to 50 mA with 1 μs transition time, however LDO is able to recover within 1.4μs. Since capacitor is not required in any part of design, it occupies only 0.010824 mmXmm area on chip.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 2; 159-165
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultra-Fast Current Aided Sintering of High Coercive Magnetic Powders and Composites
Autorzy:
Granek, K.
Ziółkowski, G.
Chrobak, A.
Klimontko, J.
Rak, J.
Zivotsky, O.
Gembalova, L.
Powiązania:
https://bibliotekanauki.pl/articles/351210.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnetic composites
ultra-fast current sintering
high coercive alloys
Opis:
The paper refers to pulverization and sintering of the (Fe80 Nb6 B14 )0.88 Tb0.12 high coercive alloy. The powder was sintered using the ultra-fast current aided method. It turned out that too long discharge time leads to appearing of a soft magnetic phase and simultaneously, decrease in coercivity of the compacted powder. Nevertheless, it was possible to establish preference technology parameters, preserving magnetic hardness of the alloy. As a final test, an impact of Co-powder addition on magnetic properties was studied. The introduced soft magnetic phase (about 20 wt. %) caused about 30% increase of magnetic remanence, which is a resultof direct exchange interactions between the two phases.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 2; 791-796
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hardware-efficient algorithms for implementation of the GHM discrete multiwavelet transform kernels
Autorzy:
Cariow, A.
Cariowa, G.
Powiązania:
https://bibliotekanauki.pl/articles/114256.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
multiwavelets
GHM
fast algorithms
implementation complexity reduction
FPGA implementation
Opis:
In this correspondence, we discuss two efficient algorithms for the execution of forward (FDMWT) and inverse (IDMWT) discrete multiwavelet transform basic operations with reduced computational complexities. We used multiwavelet basis proposed by Geronimo, Hadrin, and Massopust (GHM). The direct implementation of GHM-FDMWT basic operation requires 23 multiplications and 19 additions. The direct implementation of GHM-IDMWT basic operation requires 23 multiplication and 16 additions. At the same time, our solutions allow designing the computation procedures, which take only 10 multiplications plus 15 additions for GHM-FDMWT basic operation and 10 multiplications plus 10 additions for GHM-IDMWT basic operation
Źródło:
Measurement Automation Monitoring; 2016, 62, 6; 190-192
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical investigation of airfoil in ground proximity
Numeryczne badanie efektu przypowierzchniowego profilu aerodynamicznego
Autorzy:
Abramowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/281576.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
wing-in-ground effect
ekranoplan
numerical computations
fast transport
Opis:
The paper presents numerical investigation of the ground effect which affects an air flow when a craft's wing approaches the ground or sea surface. The effect has crucial significance for the wing-in-ground craft operation and decides about the purpose of building one at alI. The two-dimensional viscous flow problem is solved and the results of calculations are presented. Furthermore, some most important issues related to the basics of an ekranoplan application are very briefly discussed. On the basis of numerical calculations, an empirical formula has been proposed for quantitative assessment of the chord dominated ground effect.
Artykuł prezentuje wyniki badań numerycznych jednego z dwóch zjawisk zmieniających opływ skrzydła zbliżającego się do powierzchni gruntu lub morza. Efekt ten ma podstawowe znaczenie dla eksploatacji obiektu typu WIG, a przede wszystkim stanowi o sensie budowania takiej jednostki w ogóle. Uzyskano rozwiązanie dla przepływu dwuwymiarowego i zaprezentowano wyniki. Bardzo ogólnie zaprezentowano również podstawowe problemy związane z zastosowaniem ekranoplanu jako środka transportu. W oparciu o wyniki badań numerycznych zaproponowano wzór empiryczny do oceny ilościowej efektu przypowierzchniowego związanego ze zbliżaniem się profilu aerodynamicznego do powierzchni gruntu lub morza. Zależność tą można wykorzystać w praktyce, jeżeli tylko efekt związany z wirem wierzchołkowym skrzydła będzie miał pomijalny wpływ na cały efekt przypowierzchniowy.
Źródło:
Journal of Theoretical and Applied Mechanics; 2007, 45, 2; 425-436
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The problem of not driven propellers in Multi - screw ships propulsion arrangements
Autorzy:
Charchalis, A.
Powiązania:
https://bibliotekanauki.pl/articles/247889.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
fast ships
ships screw propeller
multi-screw propulsion arrangements
Opis:
Power requirement for ship's movement depends on their size (water displacement) and sailing speed. The problem is especially important for fast ships, because the speed of movement is generating significant high power requirement, while limited displacement, diminishing a drag quantity from one hand, is a reason of limited draft and consequently limited capacity of a hull from the other. Above facts have strong influence at a number, type, power and size of main engines and propellers. Fast ships are designed for reaching maximum speed, but majority of exploitation time, are cruising at lower speed, called partial speed. That exploitation profile requires stopping of some engines or braking of propellers. Not driven propellers are dragged behind the hull, and work at a turbine mode, giving a torque at a propulsion shaft and creates a negative thrust what means the additional drag. The additional drag of not driven propellers must be calculated during the propulsion design stage, and analysis of speed value during different variants of the ship's movement . Torque values and thrusts can be evaluated basing on the universal hydrodynamic characteristics of propellers. the method and example of calculation of the drag created by free-rotating and stopped propellers of the exemplary propulsion set are presented in the paper.
Źródło:
Journal of KONES; 2012, 19, 2; 83-86
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model tests of fast units on the open waters of Jeziorak Lake
Autorzy:
Brzoska, E.
Grygorowicz, M.
Krężelewski, M.
Rogalski, A.
Powiązania:
https://bibliotekanauki.pl/articles/258512.pdf
Data publikacji:
2007
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
fast units
single hull
twin hull
model tests
speedboats
Opis:
Paper presents model tests of fast units carried out in the years 1956-2000 in the Experimental Centre of the Gdansk University of Technology Shipbuilding Institute on Jeziorak Lake. The experimental tests included single- and twin-hull hydrofoils, amphibian hovercraft, side-wall hovercraft and also speedboats and SWATH type catamarans. The aim of those tests was to acquire data for developing the design and safety criteria as well as computer programs for predicting the hydrodynamic properties of fast units. The gathered experimental material was used in the theoretical studies, publications and conference papers.
Źródło:
Polish Maritime Research; 2007, S 2; 3-7
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mapping spatial and temporal changes of global corporate research and development activities by conducting a bibliometric analysis
Autorzy:
Csomós, György
Powiązania:
https://bibliotekanauki.pl/articles/1052497.pdf
Data publikacji:
2017-03-15
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
scientific article
corporate research and development
fast-growing industries
Opis:
Corporate research and development (R&D) activities have long been highly concentrated in a handful of world cities. This is due to the fact that these cities (e.g., Tokyo, New York, London, and Paris) are home to the largest and most powerful transnational corporations and are globally important sites for innovative start-up firms that operate in the fastest growing industries. However, in tandem with the rapid technological changes of our age, corporate R&D activities have shifted towards newly emerging and now globally significant R&D centres, like San Jose, San Francisco, and Boston in the United States, and Beijing, Seoul, and Shenzhen in East Asia. In this paper, I will conduct a bibliometric analysis to define which cities are centres of corporate R&D activities, how different industries influence their performance, and what spatial tendencies characterise the period from 1980 to 2014. The bibliometric analysis is based upon an assumption that implies there is a close connection between the number of scientific articles published by a given firm and the volume of its R&D activity.Results show that firms headquartered in Tokyo, New York, London, and Paris published the largest combined number of scientific articles in the period from 1980 to 2014, but that the growth rate of the annual output of scientific articles was much greater in Boston, San Jose, Beijing, and Seoul, as well as some Taiwanese cities. Furthermore, it can also be seen that those cities that have the largest number of articles; i.e., that can be considered as the most significant sites of corporate R&D in which firms operate in fast-growing industries, are primarily in the pharmaceutical and information technology industries. For these reasons, some mid-sized cities that are home to globally significant pharmaceutical or information technology firms are also top corporate R&D hubs.
Źródło:
Quaestiones Geographicae; 2017, 36, 1; 65-77
0137-477X
2081-6383
Pojawia się w:
Quaestiones Geographicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Autofocusing with the help of orthogonal series transforms
Autorzy:
Śliwiński, P.
Powiązania:
https://bibliotekanauki.pl/articles/226176.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
autofocusing
discrete orthogonal systems
fast orthogonal transform
transform coding
Opis:
An autofocus algorithm employing orthogonal series expansions is proposed. Several instances of the generic algorithm, based on discrete trigonometric, polynomial and wavelet series, are reviewed. The algorithms are easy to implement in the transform coders used in digital cameras. Formal analysis of the algorithm properties is illustrated in experiments. Some practical issues are also discussed.
Źródło:
International Journal of Electronics and Telecommunications; 2010, 56, 1; 33-39
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the core saturation on the dynamic performance of the magnetostrictive actuator
Autorzy:
Kowalski, K.
Nowak, L.
Knypiński, Ł.
Idziak, P.
Powiązania:
https://bibliotekanauki.pl/articles/141353.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnetostriction
fast-acting actuator
finite element analysis
transient analysis
Opis:
The paper considers the influence of core saturation on the dynamics of magnetostrictive fast-acting actuator. The field-circuit mathematical model of the dynamic operation of the capacitor-actuator system is applied. Two kinds of magnetostrictive core nonlinearity are taken into account. It has been proved that the saturation of the B-H curve practically does not affect the current, and capacitor voltage waveforms, but significantly affects a core elongation waveform. The computed results are compared with experimental ones.
Źródło:
Archives of Electrical Engineering; 2017, 66, 3; 523-531
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Issues of Fashion Brand Equity in a Circular Economy
Autorzy:
Bieńkowska, Jolanta
Powiązania:
https://bibliotekanauki.pl/articles/16728998.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
luxury fashion
fast fashion
sustainable fashion
ecology
circular economy
Opis:
Theoretical background: The worldwide fashion business has confronted the demand to transit from a linear to a circular business model that involves a series of fundamental alterations to the hitherto highly efficient strategies. As a consequence, a conceptual issue concerning fashion brand value creation has emerged. This applies notably to luxury, premium and fast fashion brands. Satisfying the expectations of customers and stakeholders should cease to be simply a matter of manufacturing a varied and impressive product line, since it has to be both sustainable and sensitive to the emergent requirements of the natural and social environment. Along with the aforementioned challenges, the key messages conveyed by brands through the marketing communication are also undergoing a transformation. Purpose of the article: To present the perspectives on building fashion brand equity in a circular economy, including risks and opportunities. Research methods: A review of scientific and specialised studies, selected using specific keywords, was undertaken. Data sources included academic resources: books, articles, market data (e.g. McKinsey & Company) and statistics published on the Statista platform, as well as specialised resources: expert articles, reports from organisations approaching the issue under research (e.g. EU, UN, Fashion Revolution, the Ellen MacArthur Foundation, etc.). The search area was composed of electronic resources: licensed, open access websites and topic-related websites. The aim of the data analysis was to systematise background knowledge through an inductive method. Main findings: 1. The fashion business needs a change of mission, vision and strategy along with cooperation and coopetition among brands of the luxury goods, mass goods and organic MSMEs markets within its ecosystems in order to achieve the expected brand value. 2. The implementation of circular economy model in the fashion business implies the necessity to restrict overproduction and overconsumption of clothes and accessories at the same time as utilising sustainable raw materials and production technologies. Furthermore, it requires the dissemination of the slow fashion model, which incorporates the reuse of clothes by other users (rental of clothes, second hand, upcycling). 3. Change of consumer behaviour, popularisation of research findings and expertise from independent organizations is a factor stimulating fashion brands to act towards a circular economy in order to maintain high brand value.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio H – Oeconomia; 2023, 57, 1; 41-59
0459-9586
2449-8513
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio H – Oeconomia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Firefly algorithm optimization of manipulator robotic control based on fast terminal sliding mode
Autorzy:
Mallem, Ali
Douak, Fouzi
Benaziza, Walid
Bounouara, Asma
Powiązania:
https://bibliotekanauki.pl/articles/27314236.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
manipulator robotic
fast terminal sliding mode
firefly algorithm
Lyapunov stability
Opis:
In this paper a new algorithm of optimization in the field of manipulator robotic control is presented. The proposed control approach is based on fast terminal sliding mode control (FTSMC), in order to guarantee the convergence of the position articulations errors to zero in finite time without chattering phenomena, and the Firefly algorithm in order to generate the optimal parameters that ensure minimum reaching time and mean square error and achieve better performances. This ensures the asymptotic stability of the system using a Lyapunov candidate in the presence of disturbances. The simulations are applied on a two-link robotic manipulator with different tracking references by using Matlab/ Simulink. Results show the efficiency and confirm the robustness of the proposed control strategy.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2022, 16, 4; 44--52
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of signal disruptions from an optical triangulation measurement sensor
Autorzy:
Stryczek, R.
Dutka, P.
Powiązania:
https://bibliotekanauki.pl/articles/114091.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
laser measurements
fast Fourier transformation
low-pass filtering
measurement capability
Opis:
The paper presents the analysis of a measurement signal from a measurement triangulation sensor (laser) obtained during the positioning of an industrial robot. The signal is characterised by the range of disruptions. Their character is complex, because it involves the influence of robot position correction signals generated by the drive, free vibrations of the mechanical system caused by its movement and instability of reading the optical measurement sensor. There are presented the components of a test stand as well as the interactions between the robot control system, PLC, the laser controller and the user's HMI. The results of the analysis of the obtained data indicate that the reliable reading in the time shorter than the time of the system relaxation is possible. The presented issue is an element of a wider research program, the aim of which is to determine the correlations between the measurement capability of the method realised with the active use of an industrial robot and the measurement realisation time.
Źródło:
Measurement Automation Monitoring; 2016, 62, 2; 62-65
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multimodalne pomiary drgań struny
Multimodal string vibration measurements
Autorzy:
Stefaniak, Marta
Nosorowski, Witold
Powiązania:
https://bibliotekanauki.pl/articles/269141.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
szybka kamera
gitara
struna
drgania
fast camera
guitar
string
vibrations
Opis:
W artykule zostały przedstawione badania drgań struny zrealizowane przy użyciu szybkich kamer wizyjnych, mikrofonu oraz akcelerometru. Obiektem badań były instrumenty muzyczne. Opisano zjawiska zachodzące w instrumencie podczas tworzenia się i wydobywania z niego dźwięku. Celem pracy było zbadanie różnic w wynikach otrzymanych poprzez pomiary wykonane z użyciem zróżnicowanych reprezentacji obrazowych i sygnałowych. Zaproponowano sposób pobudzania instrumentu, który pozwolił na wykonywane badań w sposób powtarzalny. Opisano metodologię wykonanych pomiarów oraz algorytm do analizy pomiarów wykonanych metodą optyczną, który umożliwił przetworzenie zarejestrowanego obrazu na sygnał foniczny. Na koniec zaprezentowano otrzymane wyniki z wszystkich modalności oraz wnioski z analiz.
The article presents string vibration measurements carried out using fast vision cameras, a microphone and an accelerometer. Various types of acoustic guitars were selected for testing. The phenomena occurring in the instrument during the creation and extraction of sound from it were described. The aim of the study was to examine the differences in the results obtained through measurements made with different modalities and to determine which method gives the most accurate results. The measurements were carried out in an anechoic chamber, due to the need to maintain the closest possible ambient conditions during all measurements. A method of stimulating the instrument was proposed, which allowed for repeated tests. High-speed industrial cameras have enabled the recording of vibrations of selected points of the measured object. The work describes the methodology of measurements taken and the algorithm for analyzing measurements made using the optical method, which enabled the recorded image to be converted into an audio signal. The process of developing measurement data was discussed. Finally, the results obtained from all modalities and conclusions from the analyses were presented, and the possibilities of further experiments were proposed.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2019, 68; 53-56
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 294

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies