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    Wyświetlanie 1-9 z 9
    Tytuł:
    Charakterystyka termofilnych drobnoustrojów z rodzaju Campylobacter izolowanych z różnych źródeł. IV. Przeżywalność C.jejuni na powierzchni peklowanego mięsa
    KHARAKTERISTIKA TERMOFIL’NYKH MIKROBOW IZ RODA CAMPYLOBACTER, IZOLIROWANNYKH IZ RAZNYKH ISTOCHNOKOW. IV. Perezhiwanie C. jejuni na powerkhnosti zasolennogo mjasa
    CHARACTERISTICS OF THERMOFILIC MICROORGANISMS FROM THE GENUS CAMPYLOBACTER ISOLATED FROM VARIOUS SOURCES. Part IV. Survival of C. jejuni on the surface of pickled meat
    Autorzy:
    Dabrowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/873429.pdf
    Data publikacji:
    1988
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    drobnoustroje
    mikroorganizmy
    miso
    peklowanie
    Campylobacter jejuni
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 1988, 39, 3
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy Consumption Models For MISO-UWB and TR-MISO-UWB Systems
    Autorzy:
    El Abboubi, A.
    Elbahhar, F.
    Heddebaut, M.
    Elhillali, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/226206.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    energy efficiency
    time reversal
    MISO systems
    UWB
    Opis:
    This paper, an energy consumption model is developed and exploited to evaluate the electrical energy consumption of ultra-wideband impulse radio (UWB-IR) systems. We develop the energy consumption models and our comparative study, on the one hand, for a system based single-input singleoutput (SISO) configuration and a multiple-input single-output (MISO) and, on the other hand, for a time reversal TR-MISO configuration and for MISO alone configuration. We consider an indoor propagation environment based on the 802.15.4a channel model. The results show very different behaviors depending on the propagation conditions, the number of antennas used, or on the number of transmitted symbols. Using such a model, a radiofrequency designer can obtain significant inputs to optimally select an adequate configuration to design an adaptive energyaware UWB-IR system.
    Źródło:
    International Journal of Electronics and Telecommunications; 2017, 63, 3; 285-291
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Występowanie histaminy w konserwach rybnych
    GISTAMIN W RYBNYKH KONSERWAKH
    HISTAMINE PRESENCE IN CANNED FISH
    Autorzy:
    Windyga, B.
    Sciezynska, H.
    Gorecka, K.
    Balcerzak, G.
    Grochowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/876381.pdf
    Data publikacji:
    1988
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    konserwy rybne
    histamina
    bakterie
    zatrucia pokarmowe
    miso
    ryby
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 1988, 39, 6
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hardware Implementation of MISO on Orthogonal Frequency Division Multiplexing Platform with the Help of Alamouti Algorithm
    Autorzy:
    Kilaru, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/226220.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    MISO
    SISO
    FPGA
    Xilinx
    BER
    SNR
    Alamouti
    LTE
    Opis:
    Many software based OFDM techniques were proposed from last half decade to improve the performance of the system. This paper tried to implement the same with Hardwar implementation. We created Hardware based MISO platform with OFDM. We implemented Alamouti algorithm on this test bed. The test bed is implemented with the help of Field Programmable Gate Array (FPGA). The test bed is functionalized with the help of FPGA through Xilinx based system generator for DSP. In this paper we considered the 2×1 MISO implementation with Alamouti algorithm. The simulation results showed that BER and SNR are considerably high for MISO than SISO. The results also proved that proposed OFDM based Alamouti implementation for MISO is excellent in all performance criterions.
    Źródło:
    International Journal of Electronics and Telecommunications; 2017, 63, 2; 137-143
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Voiceless Stop Consonant Modelling and Synthesis Framework Based on MISO Dynamic System
    Autorzy:
    Korvel, G.
    Kostek, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/177173.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    speech synthesis
    consonant phonemes
    phoneme modelling framework
    MISO system
    Opis:
    A voiceless stop consonant phoneme modelling and synthesis framework based on a phoneme modeling in low-frequency range and high-frequency range separately is proposed. The phoneme signal is decomposed into the sums of simpler basic components and described as the output of a linear multiple-input and single-output (MISO) system. The impulse response of each channel is a third order quasi-polynomial. Using this framework, the limit between the frequency ranges is determined. A new limit point searching three-step algorithm is given in this paper. Within this framework, the input of the low-frequency component is equal to one, and the impulse response generates the whole component. The high-frequency component appears when the system is excited by semi-periodic impulses. The filter impulse response of this component model is single period and decays after three periods. Application of the proposed modelling framework for the voiceless stop consonant phoneme has shown that the quality of the model is sufficiently good.
    Źródło:
    Archives of Acoustics; 2017, 42, 3; 375-383
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance Improvement for Vehicular Communications Using Alamouti Scheme with High Mobility
    Autorzy:
    Youssefi, My Abdelkader
    Mouhsen, Ahmed
    Powiązania:
    https://bibliotekanauki.pl/articles/308551.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    IEEE 802.11p
    MIMO
    MISO
    OFDM
    SFBC
    STBC
    vehicular channel
    Opis:
    The IEEE 802.11p standard is the basic protocol for wireless access in a vehicular environment (WAVE), providing high throughput for multimedia and high quality for vehicular transmissions. However, IEEE 802.11p fails to offer any multi-antenna approaches. In this paper, a multipleinput single-output (MISO) implementation with orthogonal frequency division multiplexing (OFDM), aiming to improve the performance of IEEE 802.11p, is proposed. The authors investigate the impact of time-varying channel on the performance of Alamouti space-time block codes (STBC) in OFDM systems. The Alamouti STBC approach shows good performance in slow time-varying environments, while its Alamouti space frequency block codes (SFBC) counterpart performs better over fast time-varying environments. An adaptive switching scheme is proposed to select appropriate spaceblock coding (STBC or SFBC) in vehicular channels with high mobility levels. It is shown that the proposed adaptive scheme provides better performance compared with traditional spaceblock codes.
    Źródło:
    Journal of Telecommunications and Information Technology; 2020, 3; 47-56
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of parametric models with a priori knowledge of process properties
    Autorzy:
    Janiszowski, K. B.
    Wnuk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/330128.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    absolute error measure
    constrained parameters estimation
    parametric MISO models
    błąd bezwzględny
    estymacja parametrów
    model parametryczny
    Opis:
    An approach to estimation of a parametric discrete-time model of a process in the case of some a priori knowledge of the investigated process properties is presented. The knowledge of plant properties is introduced in the form of linear bounds, which can be determined for the coefficient vector of the parametric model studied. The approach yields special biased estimation of model coefficients that preserves demanded properties. A formula for estimation of the model coefficients is derived and combined with a recursive scheme determined for minimization of the sum of absolute model errors. The estimation problem of a model with known static gains of inputs is discussed and proper formulas are derived. This approach can overcome the non-identifiability problem which has been observed during estimation based on measurements recorded in industrial closed-loop control systems. The application of the proposed approach to estimation of a model for an industrial plant (a water injector into the steam flow in a power plant) is presented and discussed.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2016, 26, 4; 767-776
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fuzzy adaptive control of a class of MISO nonlinear systems
    Autorzy:
    Lagrat, I.
    Ouakka, H.
    Boutnhidi, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/971004.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    identyfikacja
    sterowanie adaptacyjne
    układ nieliniowy
    MISO systems
    identification
    fuzzy clustering
    Takagi-Sugeno fuzzy model
    adaptive control
    nonlinear system
    Opis:
    This paper presents a fuzzy adaptive control of a class of MISO nonlinear systems. The dynamic behaviour of each MISO systems is composed of a nonlinear term, interactions effect between the inputs, and disturbances. In these circumstances, adaptive control becomes very difficult to implement and not always an evident task. Thus, the MISO system is approximated by the Takagi-Sugeno fuzzy model. The advantage of this approximation is beneficial in the sense that it allows for converting the nonlinear problem into a linear one. In this respect, the coupling, nonlinearity and unmodeled dynamics are easily compensated. The identification and the control are conducted at the level of each local linear model based on fuzzy approach. The computational load and the complexity of nonlinear approach are reduced and permit wide applicability. The validity and the performance are tested numerically.
    Źródło:
    Control and Cybernetics; 2008, 37, 1; 177-190
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative Analysis of Channel Estimation Techniques in SISO, MISO and MIMO Systems
    Autorzy:
    Obinna, O.
    Kennedy, O.
    Osemwegie, O.
    Nsikan, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/226922.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    multiple-input multiple-output (MIMO)
    multiple-input single output (MISO)
    single input single output (SISO)
    least square estimation (L.S)
    minimum mean squared error (MMSE) estimators
    mean squared error (MSE)
    bit error rate (BER)
    Opis:
    The ever-growing need for high data rate, bandwidth efficiency, reliability, less complexity and less power consumption in our communication systems is on the increase. Modern techniques have to be developed and put in place to meet these requirements. Research has shown, that compared to conventional Single Input Single Output (SISO) systems, Multiple-Input Single Output (MISO), and Multiple-Input Multiple-Output (MIMO) can actually increase the data rate of a communication system, without actually requiring more transmit power or bandwidth. This paper aims at the investigation of the existing channel estimation techniques. Based on the pilot arrangement, the block type and comb type are compared, employing the Least Square estimation (L.S) and Minimum Mean Squared Error (MMSE) estimators. Pilots occupy bandwidth, minimizing the number of pilots used to estimate the channel, in order to allow for more bandwidth utilization for data transmission, without compromising the accuracy of the estimates is taken into consideration. Various channel interpolation techniques and pilot-data insertion ratio are investigated, simulated and compared, to determine the best performance technique with less complexity and minimum power consumption. As performance measures, the Mean Squared Error (MSE) and Bit Error Rate (BER) as a function of Signal to Noise power Ratio (SNR) of the different channel estimation techniques are plotted, in order to identify the technique with the most optimal performance. The complexity and energy efficiency of the techniques are also investigated. The system modelling and simulations are carried out using Matlab simulation package. The MIMO gives the optimum performance, followed by the MISO and SISO. This is as a result of the diversity and multiplexing gain experienced in the multiple antenna techniques using the STBC.
    Źródło:
    International Journal of Electronics and Telecommunications; 2017, 63, 3; 299-304
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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