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Wyświetlanie 1-15 z 22
Tytuł:
Interakcje między grzybami (Mycota) a mszakami (Bryophyta) w zbiorowiskach leśnych
Interactions between fungi (Mycota) and bryophytes (Bryophyta) in forest communities
Autorzy:
Grzesiak, B.
Lawrynowicz, M.
Stebel, A.
Powiązania:
https://bibliotekanauki.pl/articles/989948.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
siedliska lesne
torfowiska
mszaki
Bryophyta
interakcje grzyby-rosliny
grzyby briofilne
pasozytnictwo
mikoryza
saprotrofizm
komensalizm
bryophilous fungi
parasitism
saprotrophism
commensalism
symbiosis
forest
peat−bogs
poland
Opis:
Fungi growing on bryophytes or in their close vicinity are called bryophilous. They can create facultative or obligate associations. The paper presents fungi occurring in various relations with bryophytes, such as parasites, saprotrophs and endophytes. In Poland, majority of information about bryophilous fungi origin from papers concerned with the occurrence of these organisms within plant communities. The authors enumerate mainly facultative bryophilous macromycetes such as: Russula emetica (Schaeff.) Pers.: Fr., Lactarius thejogalus (Bull.: Fr.) Gray ss. Neuhoff, Cortinarius semisanguineus (Fr.) Gillet, and Leccinum niveum (Fr.) Rauschert. Data related to micromycetes occurring on bryophytes in Poland are scanty, and only few species were reported, e.g. Hymenoscyphus subcarneus (Schumach.) J. Schröt. and Epibryon plagiochilae). Preliminary list of obligate bryophilous fungi of Poland is provided and includes 9 Ascomycota (e.g.: Bryonectria phyllogena Döbbeler, Geoglossum sphagnophilum Ehrenb., Hymenoscyphus subcarneus (Schumach.) J. Schröt. and Sarcoleotia turficola (Boud.) Dennis) and Basidiomycota (e.g.: Armillaria ectypa (Fr.) Lamoure, Galerina calyptrata P. D. Orton, Gerronema marchantiae Singer & Clémençon, G. postii (Fr.) Singer, Hygrocybe coccineocrenata (P. D. Orton) M. M. Moser, Lyophyllum palustre (Peck) Singer, Omphalina sphagnicola (Berk.) M. M. Moser, O. umbellifera (L.) Quel., Psilocybe polytrichi (Fr.) Sacc., Rimbachia bryophila (Pers.) Redhead and Suillus flavidus (Fr.) J. Presl.). Nowadays, interactions between fungi and bryophytes become the subject of the increasing interest of mycologist and bryologists.
Źródło:
Sylwan; 2015, 159, 11; 912-920
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary investigations into the slime moulds (Myxogastria) in the “Bory Tucholskie” National Park
Autorzy:
Salamaga, A.
Grzesiak, B.
Wolski, G.J.
Kochanowska, M.
Kochanowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/67688.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Botaniczne
Opis:
Field investigations into slime moulds were conducted in the “Bory Tucholskie” National Park in 2014. These were preliminary inventory studies, as research into myxogastria had not been conducted previously in this area. A total of 34 taxa (32 species, 2 varieties) belonging to 16 genera were identified. Of them, Stemonitopsis amoena (Nann.-Bremek.) Nann.-Bremek. is a species new to the biota of Poland. The taxon Symphytocarpus flaccidus is on the red list of slime mould rare in Poland. Localities of two species – Cribraria languescens Rex and C. pertenuis Flatau & Schirmer, were recorded in Poland for the second time.
Źródło:
Acta Mycologica; 2016, 51, 1
0001-625X
2353-074X
Pojawia się w:
Acta Mycologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of dietary antioxidant supplement to blue fox diet [Alopes lagopus] on chosen blood hematological parameters
Wpływ dodatku przeciwutleniacza do karmy lisów polarnych [Alopex lagopus] na wybrane wskaźniki hematologiczne krwi
Autorzy:
Likos-Grzesiak, B.
Wnuk, W.
Martyna, J.
Nowakowicz-Dębek, B.
Saba, L.
Ondrašovičowa, O.
Powiązania:
https://bibliotekanauki.pl/articles/2197557.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
diet supplementation
antioxidant
animal nutrition
blue fox
fox
diet
Alopes lagopus
blood parameter
hematological parameter
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica; 2008, 26, 2; 19-27
0239-4243
2083-7399
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of antioxidant supplemented-diet for blue fox on chosen reproductive and performance parameters
Wpływ dodatku przeciwutleniacza do karmy lisów polarnych na parametry rozrodu i produkcyjności
Autorzy:
Likos-Grzesiak, B.
Martyna, J.
Wnuk, W.
Saba, L.
Nowakowicz-Dębek, B.
Ondrašovič, M.
Powiązania:
https://bibliotekanauki.pl/articles/2197576.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
antioxidant effect
diet supplementation
animal feeding
blue fox
fox
reproductive parameter
performance parameter
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica; 2008, 26, 3; 1-8
0239-4243
2083-7399
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of synthetic antioxidant on biochemical indices in blood of Arctic fox [Alopex lagopus]
Wpływ syntetycznego przeciwutleniacza na wskaźniki biochemiczne krwi lisów polarnych [Alopex lagopus]
Autorzy:
Saba, L.
Likos-Grzesiak, B.
Nowakowicz-Dębek, B.
Bis-Wencel, H.
Martyna, J.
Wnuk, W.
Powiązania:
https://bibliotekanauki.pl/articles/2197575.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
synthetic antioxidant
antioxidant
biochemical index
blood
Arctic fox
fox
Alopex lagopus
biochemical parameter
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica; 2008, 26, 3; 9-18
0239-4243
2083-7399
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Particle swarm optimization of artificial-neural-network-based on-line trained speed controller for battery electric vehicle
Autorzy:
Ufnalski, B.
Grzesiak, L.
Powiązania:
https://bibliotekanauki.pl/articles/201631.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electric vehicle
speed control
adaptive ANN controller
particle swarm optimization (PSO)
Opis:
The paper presents implementation of PSO (Particle Swarm Optimization) to ANN-based speed controller tuning. Selected learning parameters are optimized according to the control objective function. A battery electric vehicle is considered as a potential plant for an adaptive speed controller. The need for adaptivity in the control algorithm is justified by variations of a total weight of the vehicle. A sizable section of the paper deals with selection of a combined objective function able to effectively evaluate the quality of a solution.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 3; 661-667
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Performance Study on Synchronous and Asynchronous Update Rules for A Plug-In Direct Particle Swarm Repetitive Controller
Autorzy:
Ufnalski, B.
Grzesiak, L. M.
Powiązania:
https://bibliotekanauki.pl/articles/141272.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
repetitive process control
particle swarm optimization (PSO)
synchronous and asynchronous update rules
dynamic optimization problem
repetitive disturbance rejection
optimal control
Opis:
In this paper two different update schemes for the recently developed plug-in direct particle swarm repetitive controller (PDPSRC) are investigated and compared. The proposed approach employs the particle swarm optimizer (PSO) to solve in on-line mode a dynamic optimization problem (DOP) related to the control task in the constant-amplitude constant-frequency voltage-source inverter (CACF VSI) with an LC output filter. The effectiveness of synchronous and asynchronous update rules, both commonly used in static optimization problems (SOPs), is assessed and compared in the case of PDPSRC. The performance of the controller, when synthesized using each of the update schemes, is studied numerically.
Źródło:
Archives of Electrical Engineering; 2014, 63, 4; 635-646
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Repetitive neurocontroller with disturbance feedforward path active in the pass-to-pass direction for a VSI inverter with an output LC filter
Autorzy:
Ufnalski, B.
Grzesiak, L. M.
Powiązania:
https://bibliotekanauki.pl/articles/200017.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
repetitive control
feedforward neural network
dynamic optimization problem
repetitive disturbance rejection
voltage source inverter
disturbance dual feedforward path
sterowanie powtarzalne
sieci neuronowe
problem optymalizacji dynamicznej
przetwornica napięcia
odrzucanie zakłóceń
Opis:
An enhancement to the previously developed repetitive neurocontroller (RNC) is discussed and investigated in the paper. Originally, the time-base generator (TBG) has been used to produce the only input signal for the neural approximator. The resulting search space makes the dynamic optimization problem (DOP) of shaping the control signal solvable with the help of a function approximator such as the feed-forward neural network (FFNN). The plant under consideration, i.e. a constant-amplitude constant-frequency voltage-source inverter (CACF VSI) with an output LC filter, is assumed to be equipped with the disturbance load current sensor to enable implementation of the disturbance feed-forward (pDFF) path as a part of the non-repetitive subsystem acting in the along the pass p-direction. An investigation has been undertaken to explore potential benefits of using this signal also as an additional input for the RNC to augment the approximation space and potentially enhance the convergence rate of the real-time search process. It is numerically demonstrated in the paper that the disturbance feed-forward path active in the pass-to-pass k-direction (kDFF) improves the dynamics of the repetitive part as well indeed.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 1; 115-125
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plug-in direct particle swarm repetitive controller with a reduced dimensionality of a fitness landscape – a multi-swarm approach
Autorzy:
Ufnalski, B.
Grzesiak, L. M.
Powiązania:
https://bibliotekanauki.pl/articles/202046.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
repetitive process control
dynamic optimization problem
particle swarm optimizer
repetitive disturbance rejection
noninteracting subswarms
dimension-reduced fitness functional
powtarzalne sterowanie procesem
problem optymalizacji dynamicznej
optymalizator rojem cząstek
odrzucanie zakłóceń
sprawność funkcjonalna
Opis:
The paper describes a modification to the recently developed plug-in direct particle swarm repetitive controller (PDPSRC) for the sine-wave constant-amplitude constant-frequency (CACF) voltage-source inverter (VSI). The original PDPSRC algorithm assumes that the particle swarm optimizer (PSO) takes into account a performance index defined over the whole reference signal period. Each particle stores all the samples of the control signal, e.g. α = 200 samples for a controller working at 10 kHz and the reference frequency equal to 50 Hz. Therefore, the fitness landscape (i.e. the performance index) is -dimensional ( D), which makes optimization challenging. That solution can be categorized as the single-swarm one. It has been previously shown that the swarm controller does not suffer from long-term stability issues encountered in the classic iterative learning controllers (ILC). However, the convergence of the swarm has to be kept at a relatively low rate to enable successful exploitation in the D search space, which in turn results in slow responsiveness of the PDPSRC. Here a multi-swarm approach is proposed in which we divide a dynamic optimization problem (DOP) among less dimensional swarms. The reference signal period is segmented into shorter intervals and the control signal is optimized in each interval independently by separate swarms. The effectiveness of the proposed approach is illustrated with the help of numerical experiments on the CACF VSI with an output LC filter operating under nonlinear loads.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 4; 857-866
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybridization of the lithium energy storage for an urban electric vehicle
Autorzy:
Michalczuk, M.
Grzesiak, L. M.
Ufnalski, B.
Powiązania:
https://bibliotekanauki.pl/articles/202131.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
lithium energy storage
ultracapacitors
hybrid energy storage
battery electric vehicle
Opis:
This paper discusses benefits of introducing an ultracapacitor (UC) bank into a battery electric vehicle (BEV) powertrain. The case of 12kWh LiFePO4 battery pack is studied quantitatively. Simulation results refer, inter alia, to three main scenarios: fresh cells, half-used battery cells, and half-used ultracapacitors and batteries. Thermal modeling is incorporated into the simulation. Data from real world are considered: various driving cycles recorded using GPS receiver (incl. elevation), discharge curves from battery manufacturer, and UC equivalent series resistance (ESR) variations due to cycling according to real data reported in papers. Cost, as well as gravimetric and volumetric issues are presented. The key decisions referring to an energy storage for BEV being currently designed within the frame of ECO-Mobility Project are highlighted.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 2; 325-333
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid MPPT algorithm for PV systems under partially shaded conditions using a stochastic evolutionary search and a deterministic hill climbing
Autorzy:
Basiński, K.
Ufnalski, B.
Grzesiak, L. M.
Powiązania:
https://bibliotekanauki.pl/articles/1193446.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
maximum power point tracking
photovoltaic system
hybrid part-stochastic part-deterministic search rule
particle swarm optimization (PSO)
partial shading
hill climbing
Opis:
A hybrid maximum power point tracking method has been proposed for the photovoltaic system using a stochastic evolutionary search and a deterministic hill climbing algorithm. The proposed approach employs the particle swarm optimizer (PSO) to solve a dynamic optimization problem related to the control task in a PV system. The position of the best particle is updated by the hill climbing algorithm, and the position of the rest of the particles by the classic PSO rule. The presented method uses the re-randomization mechanism, which places five consecutive particles randomly, but in specified intervals. This mechanism helps track the maximum power point under partially shaded conditions.
Źródło:
Power Electronics and Drives; 2017, 2, 37/2; 49-59
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Particle swarm optimization of an iterative learning controller for the single-phase inverter with sinusoidal output voltage waveform
Autorzy:
Ufnalski, B.
Grzesiak, L. M.
Gałkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/200271.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
iterative learning control
sine wave inverter
particle swarm optimization (PSO)
Opis:
This paper presents the application of a particle swarm optimization (PSO) to determine iterative learning control (ILC) law gains for an inverter with an LC output filter. Available analytical tuning methods derived for a given type of ILC law are not very straightforward if additional performance requirements of the closed-loop system have to be met. These requirements usually concern the dynamics of a response to a reference signal, the dynamics of a disturbance rejection, the immunity against expected level of system and measurement noise, the robustness to anticipated variations of parameters, etc. An evolutionary optimization approach based on the swarm intelligence is proposed here. It is shown that in the case of the ILC applied to the LC filter, a cost function based on mean squares can produce satisfactory tuning effects. The efficacy of the procedure is illustrated by performing the optimization for various noise levels and various requested dynamics.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 3; 649-660
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anti-windup strategy for an LQ current controller with oscillatory terms for three-phase grid-tie VSCs in SMES systems
Autorzy:
Gałecki, A.
Grzesiak, L.
Ufnalski, B.
Kaszewski, A.
Michalczuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/1193252.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
grid-connected converter
linear quadratic control
resonant control
current control
anti-windup
Opis:
The paper presents a linear-quadratic current controller with damped oscillatory terms designed for three-phase grid-tie voltage source converters used in SMES systems and operated under distorted grid voltage conditions. Special emphasis is placed on a synthesis of an anti-windup mechanism to prevent wind-up derived from the oscillatory terms by the use of a new active damping loop based on a simple moving average method. As a consequence, the current feedback gain may be increased without unwanted overshoot and overruns, and performance of the system can be improved.
Źródło:
Power Electronics and Drives; 2016, 1, 36/2; 65-81
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grid-tied converter operated under unbalanced and distorted grid voltage conditions
Autorzy:
Gałecki, A.
Michalczuk, M.
Kaszewski, A.
Ufnalski, B.
Grzesiak, L. M.
Powiązania:
https://bibliotekanauki.pl/articles/200867.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
grid tied converter
AC/DC converter
current controller
resonant controller
particle swarm optimization (PSO)
Opis:
The paper presents a three-phase grid-tied converter operated under unbalanced and distorted grid voltage conditions, using a multi-oscillatory current controller to provide high quality phase currents. The aim of this study is to introduce a systematic design of the current control loop. A distinctive feature of the proposed method is that the designer needs to define the required response and the disturbance characteristic, rather than usually unintuitive coefficients of controllers. Most common approach to tuning a state-feedback controller use linear-quadratic regulator (LQR) technique or pole-placement method. The tuning process for those methods usually comes down to guessing several parameters. For more complex systems including multi-oscillatory terms, control system tuning is unintuitive and cannot be effectively done by trial and error method. This paper proposes particle swarm optimization to find the optimal weights in a cost function for the LQR procedure. Complete settings for optimization procedure and numerical model are presented. Our goal here is to demonstrate an original design workflow. The proposed method has been verified in experimental study at a 10 kW laboratory setup.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 2; 389-398
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Powertrain system with the ultracapacitor-based auxiliary energy storage for an urban battery electric vehicle
System napędowy z magazynowaniem energii pomocniczej oparty na ultrakondensatorze dla miejskiego akumulatorowego pojazdu elektrycznego
Autorzy:
Biernat, P.
Rumniak, P.
Michalczuk, M.
Gałecki, A.
Grzesiak, L.
Ufnalski, B.
Kaszewski, A.
Powiązania:
https://bibliotekanauki.pl/articles/224027.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
urban electric vehicle
hybrid energy source
ultracapacitor
battery
miejski pojazd elektryczny
układ napędowy
źródła energii hybrydowej
ultrakondensator
akumulator
Opis:
This paper presents a powertrain system for an urban electric vehicle. The powertrain system consists of a hybrid energy source (battery storage and ultracapacitors) and drivetrain system (two in-wheel outer-rotor PMSM motors). Battery performance improvement, has been achieved by supporting it with ultracapacitor energy storage. Power flow control using fuzzy logic controller is presented in detail. An electronic differential algorithms have been implemented and tested.
W artykule przedstawiono układ napędowy dla miejskiego pojazdu elektrycznego. Układ napędowy składa się z hybrydowego źródła energii (akumulatory i ultrakondensatory) i systemu napędowego (dwa silniki w-kołach o zewnętrznym wirniku PMSM). Osiągnięto poprawę wydajności akumulatora poprzez wspieranie go magazynowaniem energii przez ultrakondensator. Przedstawiono w szczegółach sterowanie przepływem mocy z wykorzystaniem regulatora logiki rozmytej. Elektroniczne algorytmy różnicowe zostały wdrożone i przetestowane.
Źródło:
Archives of Transport; 2013, 27-28, 3-4; 45-64
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 22

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