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Wyszukujesz frazę "Sikora, B." wg kryterium: Autor


Tytuł:
Controllability criteria for time-delay fractional systems with a retarded state
Autorzy:
Sikora, B.
Powiązania:
https://bibliotekanauki.pl/articles/330421.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fractional dynamical systems
controllability criteria
delays in the state
constraints
pseudotransition matrix
Caputo derivative
układ dynamiczny ułamkowy
sterowalność
pochodna ułamkowego rzędu Caputo
Opis:
The paper is concerned with time-delay linear fractional systems with multiple delays in the state. A formula for the solution of the discussed systems is presented and derived using the Laplace transform. Definitions of relative controllability with and without constraints for linear fractional systems with delays in the state are formulated. Relative controllability, both with and without constraints imposed on control values, is discussed. Various types of necessary and sufficient conditions for relative controllability and relative U-controllability are established and proved. Numerical examples illustrate the obtained theoretical results.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2016, 26, 3; 521-531
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Constrained Controllability of Dynamical Systems With Multiple Delays in the State
Autorzy:
Sikora, B.
Powiązania:
https://bibliotekanauki.pl/articles/908099.pdf
Data publikacji:
2003
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
matematyka
delay systems
constrained controllability
control
constraints
asymptotic stability
Opis:
Linear stationary dynamical systems with multiple constant delays in the state are studied. Their relative and approximate controllability properties with constrained controls are discussed. Definitions of various types of controllability with constrained controls for systems with delays in the state are introduced. Some theorems concerning the relative and the approximate relative controllability with constrained controls for dynamical systems with delays in the state are established. Various types of constraints are considered. Numerical examples illustrate the theoretical analysis. An example of a real technical dynamical system is given to indicate one of possible practical applications of the theoretical results.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2003, 13, 4; 469-479
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sprawozdanie z konferencji naukowej na temat wieku rębności drzewostanów sosnowych na Pojezierzu Mazurskim, zorganizowanej w ramach 60 Zjazdu Polskiego Towarzystwa Leśnego. Olsztym 24-25 września 1960 r.
Report on the scientific conference, held in Olsztyn september 24 - 25, 1960, organized at the 60-th Congress of the Polish Forest Society, to discuss the topic of the Cutting age of pine stands in Mazurian Lake District
Autorzy:
Sikora, B.
Powiązania:
https://bibliotekanauki.pl/articles/820896.pdf
Data publikacji:
1961
Wydawca:
Polskie Towarzystwo Leśne
Źródło:
Sylwan; 1961, 105, 05
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metodyka badań nad produkcyjnością drzewostanów na różnych siedliskach leśnych
Metodika issledovanijj produktivnosti drevostoev v raznykh lesnykh uslovijakh mestoproizrastanija
Procedure of studies on the productivity of stands on various forest sites
Autorzy:
Sikora, B.
Powiązania:
https://bibliotekanauki.pl/articles/814285.pdf
Data publikacji:
1973
Wydawca:
Polskie Towarzystwo Leśne
Źródło:
Sylwan; 1973, 117, 08
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena istotności wpływu transferu naprężeń statycznych wywołanych przemieszczeniem kosejsmicznym wstrząsów górniczych na proces sejsmogeniczny w kopalniach
Significance of static stress transfer caused by coseismic slip of mining-induced seismic events in seismicity generation process in mines
Autorzy:
Orlecka-Sikora, B.
Powiązania:
https://bibliotekanauki.pl/articles/183695.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
sejsmiczność indukowana
kopalnia Rudna
transfer naprężeń statycznych
zmiany naprężenia Coulomba
induced seismicity
Rudna mine
static stress transfer
Coulomb stress changes
Opis:
We investigated an effect of static stress transfer for the mining-induced seismicity from Rudna Mine. We consider events of energy over 10/5J, which occurred in Rudna Mine from 1993-2006. We examine the possible triggering checking correlation between event locations and the stress-increased zones. We find that more than 50% of the analyzed seismic events occurred in areas where stress was enhanced due to the occurrence of previous events. Statistical test proved that for stress changes from 0.02 bar static stress triggering in Rudna Mine exists and this effect is statistically significant at the 95% confidence level.
Źródło:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2009, 35, 2/1; 507-514
0138-0974
Pojawia się w:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of RAPD technique for identification of interspecific hybrids from genus Capsicum
Wykorzystanie techniki RAPD w identyfikacji mieszańców międzygatunkowych w obrębie rodzaju Capsicum
Autorzy:
Sikora, B/
Nowaczyk, P.
Powiązania:
https://bibliotekanauki.pl/articles/11542751.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
Molecular biology techniques based on DNA analysis are being increasingly used in modern plant breeding. In most cases DNA amplification methods using the PCR are being applied. The aim of this study was to assess the applicability of RAPD tech-nique in identification of interspecific hybrids from genus Capsicum. The material consisted of selected interspecific hybrids (C. frutescens × C. annuum), (C. frutescens × C. chinense) and (C. frutescens × C. baccatum) and their respective parental breeding lines. The research was conducted with fifteen decamer primers. The size of amplified products ranged from 122–2127 bp, and their number from 3 to 17 per primer. All 15 primers made it possible to analyze 143 loci, of which 111 were polymorphic. The analysis of electrophoretograms allowed the identification of all studied genotypes and confirmation of hybrid origin of all tested hybrids. Two RAPD markers were obtained for the C. frutescens × C. annuum hybrid, two markers for C. frutescens × C. baccatum hybrid and five markers for C. frutescens × C. chinense. The data obtained were used to calculate the genetic distance between the investigated genotypes and construction of dendrograms.
We współczesnej hodowli roślin co raz częściej stosowane są techniki biologii molekularnej. W większości wypadków stosuje się metody wykorzystujące amplifikację DNA w łańcuchowej reakcji polimerazy. Celem niniejszej pracy była ocena przydatności markerów RAPD w identyfikacji mieszańców międzygatunkowych w obrębie rodzaju Capsicum. Materiał do badań stanowiły wybrane mieszańce międzygatunkowe (C. frutescens × C. annuum), (C. frutescens × C. chinense) (C. frutescens × C. baccatum) i odpowiednie linie rodzicielskie. Badania prowadzono z udziałem piętnastu 10-nukleotydowych primerów. Wielko amplifikowanych produktów wahała się w granicach 122–2127 pz, a ich liczba od 3 do 17 w zależnościoą primera. Wszystkie 15 primerów pozwoliło na analizĘ 143 loci, z których 111 było polimorficznych. Analiza elektroforo-gramóm umoŻliwiła identyfikację wszystkich analizowanych genotypów oraz potwierdzenie mieszańcowego pochodzenia wszystkich badanych mieszańców. Otrzymano dwa markery RAPD dla mieszańca C. frutescens × C. annuum, dwa dla mieszańca C. frutescens × C. baccatum i pięć markerów dla mieszańca C. frutescens × C. chinense. Otrzymane dane posłużyły do obliczenia dystansu genetycznego między genotypami i konstrukcję dendrogramów.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2014, 13, 1; 155-166
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving prediction models applied in systems monitoring natural hazards and machinery
Autorzy:
Sikora, M.
Sikora, B.
Powiązania:
https://bibliotekanauki.pl/articles/331302.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
zagrożenie naturalne
szereg czasowy
k-najbliższy sąsiad
natural hazards monitoring
regression rules
time series forecasting
k-nearest neighbors
Opis:
A method of combining three analytic techniques including regression rule induction, the k-nearest neighbors method and time series forecasting by means of the ARIMA methodology is presented. A decrease in the forecasting error while solving problems that concern natural hazards and machinery monitoring in coal mines was the main objective of the combined application of these techniques. The M5 algorithm was applied as a basic method of developing prediction models. In spite of an intensive development of regression rule induction algorithms and fuzzy-neural systems, the M5 algorithm is still characterized by the generalization ability and unbeatable time of data model creation competitive with other systems. In the paper, two solutions designed to decrease the mean square error of the obtained rules are presented. One consists in introducing into a set of conditional variables the so-called meta-variable (an analogy to constructive induction) whose values are determined by an autoregressive or the ARIMA model. The other shows that limitation of a data set on which the M5 algorithm operates by the k-nearest neighbor method can also lead to error decreasing. Moreover, three application examples of the presented solutions for data collected by systems of natural hazards and machinery monitoring in coal mines are described. In Appendix, results of several benchmark data sets analyses are given as a supplement of the presented results.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2012, 22, 2; 477-491
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On constrained stochastic controllability of dynamical systems with multiple delays in control
Autorzy:
Sikora, B.
Klamka, J.
Powiązania:
https://bibliotekanauki.pl/articles/201346.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
controllability
multiple delays in control
constrained stochastic controllability
supporting function
Opis:
Linear, continuous stochastic dynamical systems with multiple delays in control are studied in the paper. Their relative stochastic controllability with constrained control is discussed. The definitions of various type of constrained relative and absolute stochastic controllability for linear systems with delays in control are introduced. Criteria of relative and absolute stochastic controllability with constrained control are established. Constraints on control values are considered. Mutual implications between constrained relative stochastic controllability of systems with and without delays are studied as well as implications between constrained relative and absolute stochastic controllability of systems with delay in control.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 2; 301-305
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wystepowanie pasozytniczych Metazoa leszcza [Abramis brama] w zbiornikach naturalnych i sztucznych w Polsce
Autorzy:
Kedra, A H
Sikora, B.
Powiązania:
https://bibliotekanauki.pl/articles/841473.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Abramis brama
pasozyty zwierzat
Polska
parazytologia
leszcz
sztuczne zbiorniki wodne
Metazoa
naturalne zbiorniki wodne
Opis:
Occurrence of parasitic Metazoa of bream (Abramis brama) in the natural and artificial reservoirs in Poland. The occurrence of parasitic Metazoa of bream in Poland was analyzed. Three types of reservoirs were studied - lakes, lakes heated with thermal effluents and artificial reservoirs. The estimated model S = 3.367 * ln(N) - 1.192 described relationship between sample size and richness of the component community of bream parasites in lakes. On the basis of this model the confidence intervals for each artificial reservoir and thermally affected lake were computed. The richness of the component communitites of bream did not depend on the type of reservoir (natural vs. Artificial). It was affected by the thermal eftluents (richer communities in heated lakes), geographical isolation of the reservoir, and young age of the reservoir. Most spectacular influence of the artificial origin of the reservoir was found in Monogenea (group missing in 5-year old reservoir) and Acanthocephalus anguillae (present in 1 out of 4 artificial reservoirs).
Źródło:
Annals of Parasitology; 2003, 49, 1; 21-29
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Występowanie pasożytniczych Metazoa leszcza [Abramis brama] w zbiornikach naturalnych i sztucznych w Polsce
Autorzy:
Kędra, A. H.
Sikora, B.
Powiązania:
https://bibliotekanauki.pl/articles/2147610.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Abramis brama
pasozyty zwierzat
Polska
parazytologia
leszcz
sztuczne zbiorniki wodne
Metazoa
naturalne zbiorniki wodne
Opis:
Occurrence of parasitic Metazoa of bream (Abramis brama) in the natural and artificial reservoirs in Poland. The occurrence of parasitic Metazoa of bream in Poland was analyzed. Three types of reservoirs were studied - lakes, lakes heated with thermal effluents and artificial reservoirs. The estimated model S = 3.367 * ln(N) - 1.192 described relationship between sample size and richness of the component community of bream parasites in lakes. On the basis of this model the confidence intervals for each artificial reservoir and thermally affected lake were computed. The richness of the component communitites of bream did not depend on the type of reservoir (natural vs. Artificial). It was affected by the thermal eftluents (richer communities in heated lakes), geographical isolation of the reservoir, and young age of the reservoir. Most spectacular influence of the artificial origin of the reservoir was found in Monogenea (group missing in 5-year old reservoir) and Acanthocephalus anguillae (present in 1 out of 4 artificial reservoirs).
Źródło:
Wiadomości Parazytologiczne; 2003, 49, 1; 21-29
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production of co-immobilized dextransucrase and dextranase preparations and their application in isomalto-oligosaccharides synthesis
Autorzy:
Sikora, B.
Kubik, C.
Bielecki, S.
Powiązania:
https://bibliotekanauki.pl/articles/410401.pdf
Data publikacji:
2017
Wydawca:
Politechnika Łódzka. Wydawnictwo Politechniki Łódzkiej
Tematy:
dextranase
dextransucrase
co-immobilization
hydroxyapatite
sodium alginate
dekstranaza
dekstranosacharaza
hydroksyapatyt
alginian sodowy
Opis:
Dextransucrase (DS) from Leuconostoc mesenteroides and dextranase (DN) from Penicillium funiculosum were co-immobilized by entrapment in calcium alginate and used to produce isomaltooligosaccharides (IMOs) from sucrose. DS convert sucrose into dextran, which is thesubstrate for DN, so that IMOs are products of dextran hydrolysis. Before the co-immobilization DS was cross-linked with glutardialdehyde (GA), while DN was adsorbed on hydroxyapatite (HAp). Cross-linking was essential for the stability of DS and pre-immobilization of DN to prevent enzyme from leaking out of the alginate beads. Operational stability of co-immobilized preparations of DS and DN was estimated based on amounts of isomaltose and isomaltotriose formed during successive 24h processes of IMOs synthesis, carried out at 30oC, pH 5.4 and 200 rpm in 10% (w/v) sucrose solutions. Preparation characterized by the initial DS/DN activities ratio of 1/14 was found to maintain these activities at least 100 h of IMOs synthesis (5 repeated batch reaction).
Źródło:
Biotechnology and Food Science; 2017, 81, 2; 137-147
2084-0136
2299-6818
Pojawia się w:
Biotechnology and Food Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of two enzymatic methods of clinical dextran production
Autorzy:
Sikora, B.
Kubik, C.
Bielecki, S.
Powiązania:
https://bibliotekanauki.pl/articles/410412.pdf
Data publikacji:
2017
Wydawca:
Politechnika Łódzka. Wydawnictwo Politechniki Łódzkiej
Tematy:
dextransucrase
dextranase
acceptor dextrans
clinical dextran
dekstranosacharaza
dekstranaza
dekstran kliniczny
Opis:
The aim of this study was to evaluate and compare of the two enzymatic methods of clinical dextran production were compared. The reactions were performed at 30°C and pH 5.4 in solutions containing different amounts of sucrose, using dextransucrase (DS, in the presence of dextranase (D) (method 1) or acceptor dextrans (method 2). The activity of Leuconostoc mesenteroides L dextransucrase (DS), which converts sucrose to dextran, was 0.4 U ml-1 in both the methods. As much as 53-56% of clinical dextran fractions were obtained for 28 h from 10% sucrose solutions, which contained 1.5% or 2.5% acceptor dextrans with molecular mass of 10 and 15 kDa, respectively. Approximately 50% of these fractions was obtained (also in 28 h) from 10% sucrose solutions by using 0.004 U ml-1 of DN, added to reaction mixtures 5 h later than our experiments indicate that the clinical dextran can be efficiently produced by using both the compared methods, which employ either acceptor dextrans with definite molecular mass, or the dextranase. Because consumption of the latter enzyme is rather small, and it is easily available, thus this method should be attractive for clinical dextran manufacturers.
Źródło:
Biotechnology and Food Science; 2017, 81, 2; 125-136
2084-0136
2299-6818
Pojawia się w:
Biotechnology and Food Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The morphology of juvenile stages of Bubophilus aluconis Nattress and Skoracki, 2009 (Acari: Syringophilidae) with a description of a male
Autorzy:
Skoracki, M.
Kavetska, K.
Ozminski, M.
Sikora, B.
Powiązania:
https://bibliotekanauki.pl/articles/6139.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
morphology
juvenile stage
Bubophilus aluconis
Acari
Syringophilidae
description
male
ectoparasite
Asio otus
Źródło:
Annals of Parasitology; 2012, 58, 1
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
European hedgehogs, Erinaceus europaeus, support the circulation of Rickettsia helvetica in sylvatic environment
Autorzy:
Stanczak, J.
Celmer, P.
Michalik, J.
Sikora, B.
Powiązania:
https://bibliotekanauki.pl/articles/6328.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
European hedgehog
Erinaceus europaeus
support
circulation
Rickettsia helvetica
Borrelia burgdorferi
Anaplasma phagocytophilum
sylvatic environment
Źródło:
Annals of Parasitology; 2016, 62, Suppl.
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł

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