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 "Janowski, T." wg kryterium: Autor

  Lista filtrów

Dostawca treści

Podbaza

Wyrównaj
Wyświetlanie 1-15 z 82
Tytuł:
Stan badań i perspektywy zastosowania nadprzewodnikowych ograniczników prądu w systemach energetycznych
State-of-art and application prospects for superconducting fault current limiters in electric power systems
Autorzy:
Janowski, T.
Surdacki, P.
Powiązania:
https://bibliotekanauki.pl/articles/158616.pdf
Data publikacji:
2002
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Elektrotechniki
Tematy:
nadprzewodnikowe ograniczniki prądu
ograniczniki prądu
urządzenia energetyczne
urządzenia nadprzewodnikowe
nadprzewodniki wysokotemperaturowe
Opis:
W pracy dokonano przeglądu aktualnego stanu badań, projektowania i technologii nadprzewodnikowych ograniczników prądu (NOP). Scharakteryzowano zasadę działania oraz porównano właściwości podstawowych typów ograniczników. Wskazano najistotniejsze zagadnienia badawcze i projektowe układów NOP, które należy rozwiązać w najbliższej przyszłości. Przedstawiono możliwości zastosowań NOP w sieciach elektroenergetycznych oraz obecnie realizowane projekty tych układów.
This paper presents the review of the contemporary concept, design and technology approaches to the superconducting fault current limiters (SFCL). The essential features of each type of the SFCL have been highlighted and the research problems to solve in the near future have been suggested. The SFCL device application advantages and the ongoing and accomplished projects have been summarized.
Źródło:
Prace Instytutu Elektrotechniki; 2002, 211; 55-70
0032-6216
Pojawia się w:
Prace Instytutu Elektrotechniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie silnika Stirlinga w mikrokogeneracji domowej
The microcogeneration system on Stirling engine
Autorzy:
Janowski, T.
Holuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/159610.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Elektrotechniki
Tematy:
mikrokogeneracja
energetyka skojarzona
silnik Stirlinga
odnawialne źródła energii
Opis:
W artykule opisano zagadnienia związane z układami skojarzonego wytwarzania ciepła i energii elektrycznej. Przedstawiono układy mikrokogeneracyjne wykorzystujące silnik Stirlinga. Omówiono przesłanki rozwoju mikrokogeneracji domowej w Polsce w tematyki w najbliższych latach.
In the article the issues connected with micro combined heat and power systems. The special attention was focused in micro-cogeneration systems on: Stirling engine. The premise of development were discussed of microchip in Poland in the following years.
Źródło:
Prace Instytutu Elektrotechniki; 2011, 249; 117-128
0032-6216
Pojawia się w:
Prace Instytutu Elektrotechniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Target tracking using multiple passive sonars
Autorzy:
Janowski, T.
Porosińska, E.
Powiązania:
https://bibliotekanauki.pl/articles/331700.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The DOA estimation methods based on the analysis of the noise subspace enable high resolution bearing determination of naval objects emitting hydrouacoustic noise. The knowledge of the objects number is the essential parameter for DOA algorithms. Practically, the number of the objects is unknown. In case of high sea ambient noise to object signal ratio the detection with desired probability is significantly hindered. In the event of system based on the console the detection decision belongs to the operator. The visual analysis of the reception beamformer changes conducts to the intruder detection. Whereas in case of the standalone systems the decision making process is performed by the detection and tracking algorithm. This article describes such algorithm based on the analysis of the machine states.
Źródło:
Hydroacoustics; 2011, 14; 69-74
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetyczne mnożniki częstotliwości – badania naukowe w Politechnice Lubelskiej w latach 1968-2014
Magnetic frequency multipliers – scientific research at the Lublin University of Technology in 1968-2014
Autorzy:
Janowski, T.
Jaroszyński, L.
Powiązania:
https://bibliotekanauki.pl/articles/267121.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
magnetyczne mnożniki częstotliwości
potrajacz
pięciokrotnik
dziewięciokrotnik
magnetic frequency multipliers
tripler
quintupler
nontupler
Opis:
W artykule omówiono badania naukowe w dziedzinie magnetycznych i hybrydowych mnożników częstotliwości prowadzone w latach 1968-2014 w Politechnice Lubelskiej. Przedstawiono osiągnięcia w dorobku naukowym pracowników oraz wybrane wdrożenia przemysłowe zaprojektowanych rozwiązań.
In most cases, magnetic frequency multiplier structure does not differ much from a plain transformer. However, there are many differences in their operation and the problem of optimization of these devices is very extensive. Despite the relatively long history of the idea of magnetic frequency multipliers, their intense development as the high-power devices fell on the period of the second half of the twentieth century. The article describes scientific research in the field of the magnetic and hybrid frequency multipliers carried out in the years 1968-2014 at the Lublin University of Technology. The team of scientists led by Professor Tadeusz Janowski built and tested several magnetic frequency convertors. The large number of them has been successfully applied in industry. Eight PhD dissertations have been prepared, five postdoctoral dissertations (habilitation theses) and over hundred scientific papers in the subject of frequency multipliers have been published. Advances in the field of high power semiconductor converters has led to the marginalization of purely magnetic solutions.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2015, 43; 163-166
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Location of the hydroacoustic noise sources performed by distributed passive sonar
Autorzy:
Janowski, T.
Porosińska, E.
Powiązania:
https://bibliotekanauki.pl/articles/331864.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
Hydroacoustic location of underwater sound sources is commonly used to protect naval bases or military sea areas from various threats. Sonar technology applies hydrophones to detect sources of underwater noises. DOA estimation method based on the high angular resolution MUSIC algorithms are commonly used for small size antennas composed of hydrophones. The article proposes another approach to this problem. Additional equipage of the hydrophone with the GPS receiver and radio transreceiver enables construction of the distributed antenna. The size of such antenna can be significantly higher in comparison to the classical passive antenna. The article describes the algorithms of the sound sources location, results of the computer simulation and possibilities of hydrophone manufacturing as well its practical usage.
Źródło:
Hydroacoustics; 2012, 15; 75-82
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation algorithms for DOA estimation with UCA
Autorzy:
Janowski, T.
Porosińska, E.
Powiązania:
https://bibliotekanauki.pl/articles/332431.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
Multi-sensors passive arrays are used to detect different objects emitting wideband acoustic signal to aquatic medium. The most important design problem is to proper match the size of the antenna and number of sensors to the wideband frequency range. Especially the multimode operation significantly increases the detection efficiency. In case of cylindrical antennas interesting is object detection at two frequencies. The first frequency results directly from the antenna radius, whereas the second one is doubled. The article presents detection capabilities of antennas composed of several hydrophones.
Źródło:
Hydroacoustics; 2012, 15; 65-74
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Data processing of broad-band signals received by multi-element cylindrical transducer
Autorzy:
Janowski, T.
Elminowicz, A.
Szworski, K.
Powiązania:
https://bibliotekanauki.pl/articles/331559.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
data processing
multi-element cylindrical transducer
hydroacoustic
Opis:
The sonar based on cylindrical transducer compared with linear transducer has few advantages. Particularly its omni-directional central symmetry enables simplification of the echo signal Direction of Arrival (DOA) estimation. When the number of transducer staves is the power of two the efficient Fast Fourier Transformation can be used to calculate spatial convolution. The article presents theoretical and technological principles of the real time digital data processing of the wideband echo signals received by cylindrical hydroacoustic transducer. Described procedures enable high resolution underwater target location and precise data display. The implementation of effective broadband pulse compression technique with high range resolution will be presented. The results of signal processing modeling and examples of application will be also discussed.
Źródło:
Hydroacoustics; 2008, 11; 113-120
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical problems of the wideband sonar time-spatial filtration
Autorzy:
Janowski, T.
Kotłowski, A.
Porosińska, E.
Powiązania:
https://bibliotekanauki.pl/articles/331819.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
wideband sonar
hydroacoustics
Opis:
The paper presents the synthesis of the time-spatial matched filtration algorithm. First part specifies base for the algorithm-input data. Successively, the matched filtration for continuous junction is depicted. This leads to the canonical form of the time-spatial filter. Consecutively, the decomposition into series connection of the matched and spatial filtration is realized. The next step is the signals approximation by Fourier series due to equivalence between approximation and interpolation on uniformly distributed discrete sampIes. The equation of the spatial filtration - in frequency domain - results from this mathematical operations. Application of the Bluestein's method to solve this equation provides to the final algorithm version. Advantages of the developed algorithm are presented in conclusions.
Źródło:
Hydroacoustics; 2003, 6; 221-228
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sonar with electronically steered transmitted beam
Autorzy:
Elminowicz, A.
Janowski, T.
Męciński, W.
Powiązania:
https://bibliotekanauki.pl/articles/332272.pdf
Data publikacji:
1997
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The ahead looking sonar with 60° sector profected by multielement cylindrical array and analog beamforming technique used multielement linear array for selecting 4° x 15 beams is presented. The aim of this paper is to study the pattern directivity of the linear multielement receiving transducer of the sonar SHL-1OOM for application to electronically steered beam profector. This paper presents the result of the computer aided calculations of the beam patterns as the function of the weighting excitation parameters and damaged elements for steered linear array.
Źródło:
Hydroacoustics; 1997, 1; 227-230
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effectiveness of determining the parturition date in bitches using the ultrasonographic fetometry as compared to hormonal and cytological methods
Autorzy:
Socha, P.
Rudowska, M.
Janowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/31979.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
effectiveness
determination
parturition
bitch
ultrasonographic fetometry
hormonal method
cytological method
fetometry
pregnancy
Opis:
In clinical practice, the parturition date in bitches is calculated on the basis of the established ovulation date, using determination of the level of LH and P4. Additionally cytological examination of vaginal smears makes it possible to establish the onset of diestrus, from which the delivery occurs after about 57 days. The latest method used in bitches for this purpose is foetal biometry. Measurements of the inner chorionic cavity diameter (ICC) and biparietal diameter (BP) with formulas published by Luvoni and Grioni have been popularized and the most practically useful. In a group of six bitches the effectiveness obtained with the use of ICC was 66.67% with an accuracy of 1 day and 100% with an accuracy of 2 days. BP measurements gave better results, as the accuracy was respectively 83.33% and 100%. The effectiveness of predicting the delivery date on the base of method consisting in determining the LH surge was 66.67% with an accuracy of 1 day and 100% with an accuracy of 2 days. The best effectiveness was obtained while using the method based on P4 level determination (100% both with an accuracy of 1 day, as well as of 2 days). The lowest accuracy was obtained while using the cytological method. Generally, a comparison of the methods used for predicting the date of delivery in bitches confirms practical usefulness of fetometry. Its effectiveness was not lower than traditional methods used so far, while its advantage lies in the ease of performance and the long term of application during gestation. However, full confirmation of the practical usefulness of this method requires further research on a larger number of animals.
Źródło:
Polish Journal of Veterinary Sciences; 2012, 15, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Endometrial histopathology, bacteriology and cytology outcomes in mares with early embryonic death (EED): a field study
Autorzy:
Długołęcka, E.
Tobolski, D.
Janowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/2087526.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
equine
uterine biopsy
early embryonic loss
pregnancy
sampling methods
Źródło:
Polish Journal of Veterinary Sciences; 2019, 2; 377-384
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Progesterone level does not distinguish the different course of canine ovulation determined by ultrasonography
Autorzy:
Domoslawska, A.
Jurczak, A.
Janowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/2087953.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The aim of this study was to compare progesterone concentrations in bitches during ovulation with a different course of follicular collapse as determined by ultrasonography. The study was conducted on 36 animals of different breeds, from 2 to 7 years old, and from 2 to 44 kg of body weight. Ultrasound examinations of ovaries were conducted in the peri-ovulatory period until ovulation was detected. Based on USG scans the animals were divided into two groups: group A with fast follicular collapse within 1 day, and group B with gradual follicular collapse within 2-3 days. Progesterone measurements were performed in both groups on the day when the beginning of ovulation was diagnosed by USG. Follicular collapse in group A was observed in 27.8% of animals (n=10) and in group B in 72.2% (n=26). There were no statistical differences (p<0.05) in progesterone concentrations between groups A and B (6.68 ± 0.92 ng/ml and 6.81 ± 0.57 ng/ml respectively). From 31 bred bitches (natural mating or insemination) pregnancy was confirmed in 29 females (93.5%). These results provide information about the sufficient stability of progesterone concentration during ovulation regardless of the follicular collapse speed. Ultrasonography during the peri-ovulatory period combined with progesterone measurements allows progress in ovulation management.
Źródło:
Polish Journal of Veterinary Sciences; 2014, 17, 2; 293-297
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Late embryonic and foetal losses in eight dairy herds in north-east Poland
Autorzy:
Baranski, W.
Zdunczyk, S.
Janowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/30348.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The information about the occurrence of embryonic and fetal losses in dairy herds in Poland is limited. Thus, the objective of this study was to assess the pregnancy loss between days 30 and 45 (late embryonic mortality) and between days 45 and 260 after artificial insemination (AI) (foetal loss). The study was carried out in 8 dairy herds in north-east Poland. In total 954 cows were examined for pregnancy on day 30 after AI using an ultrasound scanner. Cows diagnosed pregnant were re-examined on day 45 and 260 after AI using transrectal palpation. The pregnancy rate on day 30 after AI was 62.0%, after re-examination on day 45 after AI the pregnancy rate was 56.4%. The late embryonic loss rate was on an average 9.1%. The occurrence of late embryonic mortality differed not significantly (p > 0.05) among herds and ranged from 13.1% to 19.3%. The pregnancy rate on day 260 after AI was 53.5%. The average foetal loss after day 45 of pregnancy was 5.0%, ranged between herds from 0 to 9.2% (p > 0.05) and was significantly lower than embryonic loss rate (p < 0.05). The study revealed that in 8 dairy herds in north-east Poland the overall pregnancy loss between days 30 and 260 averaged 13.7% and therefore it is an important factor affecting economic efficiency of dairy production. The foetal loss was less prevalent than the late embryonic loss. Future strategies to minimizing late embryonic loss are needed.
Źródło:
Polish Journal of Veterinary Sciences; 2012, 15, 4
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oral folic acid supplementation decreases palate and/or lip cleft occurrence in Pug and Chihuahua puppies and elevates folic acid blood levels in pregnant bitches
Autorzy:
Domoslawska, A.
Jurczak, A.
Janowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/31468.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The aim of this study was to compare the frequency of the occurrence of lip and/or palate cleft (CL/CP) in new-borns of two breeds, Pugs and Chihuahuas, and to measure the folic acid blood levels in bitches during gestations both with and without folic acid oral supplementation. Bitches of 13 Pugs and 17 Chihuahuas with CL/CP cases were used in the study. In trial 1, the animals of the experimental group (n=25) were given additional folic acid from the onset of heat till the 40th day of gestation. The females of the control group (n=12) were fed a traditional diet. From all the animals blood was collected at the onset of heat, 14 days later and on the 30th day of the gestation to estimate folic acid concentration. In trial 2, the prevalence of CP/CL cases in litters from pregnancies before and after supplementation was compared. The percentage of puppies with CL/CP after supplementation decreased in both Pugs and Chihuahua puppies (10.86% and 15.78% vs. 4.76% and 4.8% respectively). On Day 0, the concentrations of folic acid were at a low physiological level (around 8 ng/ml) in all the animals. In bitches of the experimental group the blood level of folic acid on day 14th and 30th of the treatment showed an increase in both breeds (13.65 ± 4.27 ng/ml in Pugs, 10.79 ± 2.84 ng/ml in Chihuahuas, and 14.94 ± 3.22 ng/ml in Pugs, 12.95 ± 3.58 in Chihuahuas, respectively) while in the control group, this level decreased with time of gestation both in Pugs and in Chihuahuas (around 6 ng/ml). Folic acid supplementation seems to be a simple, effective preventive method to reduce the risk of CL/CP, especially in the predisposed breeds.
Źródło:
Polish Journal of Veterinary Sciences; 2013, 16, 1
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modified music algorithm for DOA estimation using the a-priori defined unitary matrix
Autorzy:
Janowski, T.
Porosińska, E.
Zając, R.
Powiązania:
https://bibliotekanauki.pl/articles/332526.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
DOA
unitary matrix
music algorithm
Opis:
The determination of the number of the simultaneously observed objects is an important problem of the MUSIC algorithm. As the result of the covariance matrix eigendecomposition the eingevector and unitary matrix are obtained. The unitary matrix defines the transformation of the measurement vector. Consequently the obtained vector is orthogonal to the noise subspace. The solution of the eigendecomposition problem can be avoided assuming a-priori knowledge of the unitary matrix. Practically, the passive sonar detects the first appeared noisy object. This enable to beforehand define the set of the unitary matrixes exactly matched to the previously determined directions of the signal arrival. The article presents the form of the matrix and features of the measurement vector transformation. The results of the DOA algorithm computer simulation for passive sonar composed of four hydrophones developed in the OBR CTM S.A. are also presented.
Źródło:
Hydroacoustics; 2009, 12; 77-82
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 82

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