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    Wyświetlanie 1-3 z 3
    Tytuł:
    Canonical Correlation Analysis in Panel Vector Error Correction Model. Performance Comparison
    Autorzy:
    Kębłowski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2076457.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    canonical correlation analysis
    cointegration
    panel VEC model
    LCCA
    Box-Tiao approach
    Opis:
    Small sample properties of unrestricted and restricted canonical correlation estimators of cointegrating vectors for panel vector autoregressive process are considered when the cross-sectional dependencies occur in the process generating nonstationary panel data. It is shown that the unrestricted Box-Tiao estimator is slightly outperformed by the unrestricted Johansen estimator if the dynamic properties of the underlying process are correctly specified. The comparison of performance of the restricted canonical correlation estimator of cointegrating vectors for the panel VAR and for the classical VAR applied independently for each cross-section reveals that the latter performs better in small samples when the cross-sectional dependence is limited to the error terms correlations, even though it is inefficient in the limit, but it falls short in comparison to the former when there are cross-sectional dependencies in the short-run dynamics and/or in the long-run adjustments
    Źródło:
    Central European Journal of Economic Modelling and Econometrics; 2016, 4; 203-217
    2080-0886
    2080-119X
    Pojawia się w:
    Central European Journal of Economic Modelling and Econometrics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diagnosis of incipient faults in nonlinear analog circuits
    Autorzy:
    Deng, Y.
    Shi, Y.
    Zhang, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/220611.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nonlinear circuits
    fault diagnosis
    Volterra series
    fractional correlation
    hidden Markov model (HMM)
    Opis:
    Considering the problem to diagnose incipient faults in nonlinear analog circuits, a novel approach based on fractional correlation is proposed and the application of the subband Volterra series is used in this paper. Firstly, the subband Volterra series is calculated from the input and output sequences of the circuit under test (CUT). Then the fractional correlation functions between the fault-free case and the incipient faulty cases of the CUT are derived. Using the feature vectors extracted from the fractional correlation functions, the hidden Markov model (HMM) is trained. Finally, the well-trained HMM is used to accomplish the incipient fault diagnosis. The simulations illustrate the proposed method and show its effectiveness in the incipient fault recognition capability.
    Źródło:
    Metrology and Measurement Systems; 2012, 19, 2; 203-218
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stability and bearing capacity of arch-shaped corrugated shell elements: experimental and numerical study
    Autorzy:
    Piekarczuk, A.
    Malowany, K.
    Więch, P.
    Kujawińska, M.
    Sulik, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/201517.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ABM technology
    arch-shaped corrugated steel structure
    FEM model
    digital image correlation
    data processing
    technologia ABM
    łukowato-falista konstrukcja stalowa
    model FEM
    cyfrowa korelacja obrazu
    przetwarzanie danych
    Opis:
    The paper presents problems related to the numerical modeling of profiled steel sheets used as self-supporting arch structures for roof covering. The rules of preparing and full analysis of a set of numerical models of these elements with a different level of complexity are given. The models are evaluated by comparing numerical results with the results of extended experimental tests performed by 3D Digital Image Correlation (DIC) method. For each model the comparison of numerical and experimental results has been made for samples of a single-wave trapezoidal profile with corrugated web and lower flanges subjected to compression and bending. The full-field analysis allows to determine the allowed simplification of numerical models which do not affect in significant way the reliability of the results. The proposed methodology is the first step in the development of full assessment methodology for different types of self-supporting arch structures produced by ABM technology.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 1; 113--123
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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