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    Wyświetlanie 1-10 z 10
    Tytuł:
    P1-TS fuzzy scheduling control system design using local pole placement and interval analysis
    Autorzy:
    Smoczek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/199816.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    P1-TS fuzzy system
    scheduling control
    LPV discrete-time system
    local pole placement
    interval analysis
    Opis:
    The linear parameter-varying (LPV) discrete-time model based design of a fuzzy scheduling control scheme is developed through incorporating the advantages of P1-TS theory, and applying the local pole placement method and interval analysis of closed-loop system polynomial coefficients. The synthesis of fuzzy scheduling control scheme is proposed in the form of iterative procedure, which enables to find the appropriate number of intervals of a fuzzy interpolator ensuring that a family of local linear controllers places closed-loop polynomial coefficients within a desired range. The computational complexity of multidimensional fuzzy scheduling control scheme synthesis is reduced using a fundamental matrix method and recursive procedure for fuzzy rule-based interpretation. The usability of the proposed method is illustrated by an implementation example and experimental results obtained on a laboratory scaled overhead crane.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 3; 455-464
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Local immunity of the respiratory mucosal system in chickens and turkeys
    Autorzy:
    Smialek, M.
    Tykalowski, B.
    Stenzel, T.
    Koncicki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/31146.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    local immunity
    respiratory system
    mucosal immunity
    chicken
    turkey
    bird
    pathological condition
    Opis:
    This review article presents fundamental mechanisms of the local mucosal immunity in selected regions of the respiratory tract in healthy birds and in some pathological conditions. The respiratory system, whose mucosa come into direct contact with microorganisms contaminating inhaled air, has some associated structures, such as Harderian gland (HG), conjunctive-associated lymphoid tissue (CALT) and paranasal glands (PG), whose participation in local mechanisms of the mucosal immunity has been corroborated by numerous scientific studies. The nasal mucosa, with structured clusters of lymphoid tissue (NALT – nasal-associated lymphoid tissue) is the first to come into contact with microorganisms which contaminate inhaled air. Lymphoid nodules, made up of B cells with frequently developed germinal centres (GC), surrounded by a coat of CD4+ cells, are the major NALT structures in chickens, whereas CD8+ cells are situated in the epithelium and in the lamina propria of the nasal cavity mucosa. Studies into respiratory system infections (e.g. Mycoplasma gallisepticum) have shown the reactivity of the tracheal mucosa to infection, despite a lack of essential lymphoid tissue. Bronchus-associated lymphoid tissue (BALT) takes part in bronchial immune processes and its structure, topography and ability to perform defensive function in birds is largely age-dependent. Mature BALT is covered by a delicate layer of epithelial cells, called follicle-associated epithelium (FAE). Germinal centres (GC), surrounded by CD4+ cells are developed in most mature BALT nodules, while CD8+ lymphocytes are dispersed among lymphoid nodules and in the epithelium, and they are rarely present in GC. Macrophages make up the first line of defence mechanisms through which the host rapidly responds to microorganisms and their products in the respiratory mucosal system. Another very important element are polymorphonuclear cells, with heterophils being the most important of them. Phagocytic cells obtained from lung lavages in birds are referred to as FARM (free avian respiratory macrophages). Their number in chickens and turkeys is estimated to be 20 times lower than that in mice and rats, which indicates a deficit in the first-line of defence in the birds’ respiratory system. There are numerous B cells and antibody secreting cells (ASC) present throughout the respiratory system in birds. Their role comes down to perform antigen-specific protection by producing antibodies (IgM, IgY or IgA class) as a result of contact with pathogenic factors.
    Źródło:
    Polish Journal of Veterinary Sciences; 2011, 14, 2
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Small time local controllability of driftless nonholonomic systems in a task-space
    Autorzy:
    Duleba, Ignacy
    Mielczarek, Arkadiusz
    Powiązania:
    https://bibliotekanauki.pl/articles/229672.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nonholonomic system
    small time local controllability
    configuration space
    task-space
    Opis:
    In this paper a small time local controllability, naturally defined in a configuration space, is transferred into a task-space. It was given its analytical characterization and practical implcations. A special attention was put on singular configurations. Theoretical considerations were illustrated with two calculation examples. An extensive comparison of the proposed construction with the controllability defined in an endogenous configuration space approach was presented pointing out to their advantages and disadvantages.
    Źródło:
    Archives of Control Sciences; 2019, 29, 3; 423-436
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Local Fault Assessment in a Helical Geared System via Sound and Vibration Parameters Using Multiclass SVM Classifiers
    Autorzy:
    Amarnath, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/178153.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gear
    ANN
    SVM
    vibration
    sound
    Opis:
    A gear system transmits power by means of meshing gear teeth and is conceptually simple and effective in power transmission. Thus typical applications include electric utilities, ships, helicopters, and many other industrial applications. Monitoring the condition of large gearboxes in industries has attracted increasing interest in the recent years owing to the need for decreasing the downtime on production machinery and for reducing the extent of secondary damage caused by failures. This paper addresses the development of a condition monitoring procedure for a gear transmission system using artificial neural networks (ANNs) and support vector machines (SVMs). Seven conditions of the gear were investigated: healthy gear and gear with six stages of depthwise wear simulated on the gear tooth. The features extracted from the measured vibration and sound signals were mean, root mean square (rms), variance, skewness, and kurtosis, which are known to be sensitive to different degrees of faults in rotating machine elements. These characteristics were used as an input features to ANN and SVM. The results show that the multilayer feed forward neural network and multiclass support vector machines can be effectively used in the diagnosis of various gear faults.
    Źródło:
    Archives of Acoustics; 2016, 41, 3; 559-571
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Koncepcja systemu zintegrowanego planowania rozwoju w Polsce (założenia i zasady kierunkowe budowania systemu)
    The Concept of Integrated Planning System in Poland. (Assumptions and Principlesfor Development of Planning System)
    Autorzy:
    Markowski, Tadeusz
    Drzazga, Dominik
    Powiązania:
    https://bibliotekanauki.pl/articles/2028733.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Land use management
    local planning
    national planning
    planning hierarchy
    regional
    planning
    spatial planning system
    strategic planning
    Opis:
    The purpose of this article is to present the author’s concept of the integrated planning system. I the fi rst part the axiological aspects of spatial planning as well as the public interest in land use are discussed. Also, the theoretical evidence for integrated planning in market economy is described and the specifi city of integrated planning approach. In the next part of this paper general assumptions of the changes recommended for the implementation in the spatial planning system are described. In the main part of the article’s text characteristics of the proposed innovations related to the sphere of strategic and spatial planning system and land use management at the local, regional and national are described. In the final part of the article comments on the spatial plans hierarchy (public interest hierarchy) are made.
    Źródło:
    Studia komitetu przestrzennego zagospodarowania kraju PAN; 2015, 164; 10-42
    0079-3507
    Pojawia się w:
    Studia komitetu przestrzennego zagospodarowania kraju PAN
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inter-harmonic parameter identification method based on transform with local maximum spectrum
    Autorzy:
    Sun, Lin
    Song, Jing
    Jin, Yan
    Powiązania:
    https://bibliotekanauki.pl/articles/2042793.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    inter-harmonic
    parameter identification
    power system
    synchrosqueezed transform
    time-frequency analysis
    Opis:
    In order to improve the detection accuracy of harmonics/inter-harmonics in power systems, a new method of harmonic/inter-harmonic detection based on synchrosqueezed transform and the Hilbert operator based on local spectrum maximum is proposed. Firstly, the spectrum of inter-harmonic signals is obtained through short-time Fourier transform, and the local maximum value of the spectrum in the frequency direction is detected. Then, based on the maximum frequency of the spectrum, a new frequency redistribution operator and synchronous extraction operator are constructed. It combines the operators with ridge detection for the decomposition of harmonic/inter-harmonic signals, so as to obtain a series of intrinsic mode function (IMF) components. Finally, the instantaneous amplitude and frequency of the IMF components is obtained by using the Hilbert operator. Meanwhile, according to the instantaneous frequency mutation point in the spectrum, the starting and ending time of transient harmonics/inter-harmonics is located accurately. Based on a low signal-to-noise ratio (SNR), the wavelet packet method (WP), Hilbert Marginal Spectrum method (HMS), synchrosqueezing wavelet transform method (SST), the Hybrid SST method (HSST), enhanced empirical wavelet transform (EEWT) and the proposed method are used to identify the harmonic/inter-harmonic parameters, respectively. The experimental results show that the proposed LMSST method can effectively separate the steady-state and transient harmonic/inter-harmonic signals, and has higher detection accuracy and better noise robustness.
    Źródło:
    Archives of Electrical Engineering; 2022, 71, 1; 189-209
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Local controllability of nonlinear discrete-time fractional order systems
    Autorzy:
    Mozyrska, D.
    Pawłuszewicz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/201944.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fractional difference operator
    fractional difference initial value problem
    nonlinear fractional order system
    linear approximation
    controllability problem
    Opis:
    The Riemann-Liouville, Caputo and Gr¨unwald-Letnikov fractional order difference operators are discussed and used to state and solve the controllability problem of a nonlinear fractional order discrete-time system. It is shown that independently of the type of fractional order difference, such a system is locally controllable in q steps if its linear approximation is globally controllable in q steps.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 1; 251-256
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Distributed generation as efficient measure to improve power generation adequacy
    Autorzy:
    Andruszkiewicz, Jerzy
    Lorenc, Józef
    Weychan, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/140385.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    distributed generation
    distribution system reliability
    generation adequacy
    local energy cluster
    power supply safety
    Opis:
    The article concerns safety of power supply for the final consumers, especially its two comprising elements, which are generation adequacy and distribution system re- liability. Generation adequacy has been defined with Loss of Load Probability (LOLP), Loss of Load Expectation (LOLE) and Energy Not Supplied (ENS) indices. Conclusions from generation adequacy forecast prepared by ENSTO-E for Poland compared with other European countries for the years 2020 and 2025 have been discussed along with the resulting threats. Interruptions in energy supply have been characterised by power discontinuity indicator SAIDI. Finally, a reliability and adequacy analysis have been performed for different scenarios of the Polish power system operation in order to assess possibilities of using distributed generation as a backup power source. Based on a simulation model created using the DIgSILENT Power Factory software, the reliability and adequacy calculations have been performed with the probabilistic non-sequential Monte Carlo method and they are followed by a discussion of the obtained results.
    Źródło:
    Archives of Electrical Engineering; 2019, 68, 2; 373-385
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New approach to isometric transformations in oblique local coordinate systems of reference
    Autorzy:
    Stępień, G.
    Zalas, E.
    Ziębka, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/145567.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    transformacja izometryczna
    fotogrametria
    układ odniesienia
    oblique orthogonal system
    isometric transformation
    big rotation angles
    Total Free Station
    Opis:
    The research article describes a method of isometric transformation and determining an exterior orientation of a measurement instrument. The method is based on a designation of a “virtual” translation of two relative oblique orthogonal systems to a common, known in the both systems, point. The relative angle orientation of the systems does not change as each of the systems is moved along its axis. The next step is the designation of the three rotation angles (e.g. Tait-Bryan or Euler angles), transformation of the system convoluted at the calculated angles and moving the system to the initial position where the primary coordinate system was. This way eliminates movements of the systems from the calculations and makes it possible to calculate angles of mutual rotation angles of two orthogonal systems primarily involved in the movement. The research article covers laboratory calculations for simulated data. The accuracy of the results is 10-6 m (10-3 regarding the accuracy of the input data). This confi rmed the correctness of the assumed calculation method. In the following step the method was verifi ed under fi eld conditions, where the accuracy of the method raised to 0.003 m. The proposed method enabled to make the measurements with the oblique and uncentered instrument, e.g. total station instrument set over an unknown point. This is the reason why the method was named by the authors as Total Free Station - TFS. The method may be also used for isometric transformations for photogrammetric purposes.
    Źródło:
    Geodesy and Cartography; 2017, 66, 2; 291-303
    2080-6736
    2300-2581
    Pojawia się w:
    Geodesy and Cartography
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Organized leisure in the 1960s: Holiday homes for residents of Nowa Huta as reported by the weekly 'Głos Nowej Huty'
    Zorganizowany wypoczynek mieszkańców Nowej Huty w latach 60. w świetle „Głosu Nowej Huty”
    Autorzy:
    Chłosta-Sikorska, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/2058315.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Poland in the 1960s
    organized leisure
    workers’ holidays in the socialist system
    state-company owned holiday homes
    Cracow-Nowa Huta
    local press
    PRL
    wczasy
    „Głos Nowej Huty”
    Nowa Huta
    prasa
    Fundusz Wczasów Pracowniczych
    zakładowe ośrodki wczasowe
    Opis:
    The Vladimir Lenin Steelworks and other state-owned enterprises in Nowa Huta, the eastern district of Cracow, ran a number of holiday centres all over Poland and encouraged their staff to spend their leave in those places with their family members and colleagues. This form of organized leisure was also promoted by the press. So for example Głos Nowej Huty, a weekly issued by the Workers’ Council of the VL Steelworks, published articles showing the attractions and, occasionally, problems of individual holiday homes. At the same time readers were encouraged to file in their application in good time. The publicity contributed to the success of this type of organized leisure — the number of people who took up this offer increased year on year throughout that period.
    Huta im. Lenina i inne zakłady zlokalizowane w dzielnicy oferowały wypoczynek w licznych zakładowych ośrodkach wczasowych całego kraju. Można tam było spędzać czas w gronie rodziny i znajomych. Pracownicy byli zachęcani do korzystania z oferty wypoczynku także za pomocą prasy. „Głos Nowej Huty” — Tygodnik Samorządu Pracowniczego HiL, przypominał o konieczności złożenia stosownych dokumentów, prezentował reportaże z pobytu w tych ośrodkach — opisując atrakcje czekające na wypoczywających, ale także wskazując na zanied-bania. Nowohucianie dość szybko przekonali się do tego sposobu spędzania urlopu i liczba wczasowiczów z roku na rok rosła.
    Źródło:
    Rocznik Historii Prasy Polskiej; 2020, 23, 4; 159-169
    1509-1074
    Pojawia się w:
    Rocznik Historii Prasy Polskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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