Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "mismatch" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-9 z 9
    Tytuł:
    Methods of Achieving Good GPR Image Resolution Using Focused SAR Processing
    Autorzy:
    Zych, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/226575.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    GRP
    LFM
    multilook
    mismatch shift
    Opis:
    The paper describes the simulation and measurement results for a ground penetrating SAR radar. The main purpose of this paper is to present the complexity of the issues relating to GPR. Permittivity of the ground determination error causes the resolution deterioration of the resulting image therefore an important task of the digital signal processing is the correct estimation of the permittivity. The article presents several methods devoted to this subject. As a simulation model of SAR system the pulse radar with LFM (Linear Frequency Modulation) signal has been applied. The aim of the experiment is to test ability of the SAR system to obtain fully focused image of the underground targets. The real data measurements took place on the 6th floor at the Faculty of Electronics and Information – Warsaw University of Technology. During measurement campaign the GPR SAR demonstrator mounted on the rails wagon has been used to generate radar motion.
    Źródło:
    International Journal of Electronics and Telecommunications; 2011, 57, 1; 49-54
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wage Effects of Overeducation: Evidence from Poland
    Autorzy:
    Broniatowska, Paulina
    Powiązania:
    https://bibliotekanauki.pl/articles/2075443.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    educational mismatch
    overeducation
    tertiary education
    wage premium
    Opis:
    The educational expansion in many advanced economies in the past few decades has triggered a debate on overeducation. The aim of the study is to provide an empirical evaluation of the wage effects of overeducation in different occupational groups. We also analyse whether these effects differ between genders. In order to achieve this, we use individual data from the Structure of Wages and Salaries by Occupations database of firms with 10 or more employees in Poland. We use data from the 2006-2014 waves of the survey. We calculate the impact of overeducation on wages using a Mincer-type wage regression model. We show that on average workers are rewarded for being overeducated, but the size of wage effects of overeducation differs among particular occupational groups. We show also that the choice of the method of measurement of overeducation affects the results
    Źródło:
    Central European Journal of Economic Modelling and Econometrics; 2021, 1; 25-53
    2080-0886
    2080-119X
    Pojawia się w:
    Central European Journal of Economic Modelling and Econometrics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Habitus Mismatch and Suffering Experienced by Polish Migrants Working below their Qualification Level in Norway
    Autorzy:
    Przybyszewska, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/972681.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    habitus mismatch
    stigmatised identity
    downward professional mobility
    class mobility
    suffering
    Opis:
    Recent research has reported that an increasing number of migrants in Norway are concentrated in the low-skilled sectors of the labour market, irrespective of their educational background, thus facilitating the formation of migrant niches in the long term. Despite the growing body of literature that raises the problem of downward professional mobility and deskilling among migrant populations, little scholarly attention has been paid to migrants’ struggles and vulnerabilities as a result of underemployment. Drawing on 30 in-depth interviews, this article explores the common experience of habitus mismatch and suffering among Poles who have worked below their level of competence or professional experience since migrating to Norway. By analysing subjective experiences of downward professional and social mobility and the conflict between valued and stigmatised identities, the article examines the various habitus mismatches that contribute to suffering in downwardly mobile Polish migrants.
    Źródło:
    Central and Eastern European Migration Review; 2020, 9, 2; 71-88
    2300-1682
    Pojawia się w:
    Central and Eastern European Migration Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pitch Processing of Speech : Comparison of Psychoacoustic and Electrophysiological Data
    Autorzy:
    Wrzosek, M.
    Maculewicz, J.
    Hafke-Dys, H.
    Nowik, A.
    Preis, A.
    Kroliczak, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/177776.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pitch processing of speech
    auditory perception-motor dissociation
    mismatch negativity
    Opis:
    The present study consisted of two experiments. The goal of the first experiment was to establish the just noticeable differences for the fundamental frequency of the vowel /u/ by using the 2AFC method. We obtained the threshold value for 27 cents. This value is larger than the motor reaction values which had been observed in previous experiments (e.g. 9 or 19 cents). The second experiment was intended to provide neurophysiological confirmation of the detection of shifts in a frequency, using event-related potentials (ERPs). We concentrated on the mismatch negativity (MMN) - the component elicited by the change in the pattern of stimuli. Its occurrence is correlated with the discrimination threshold. In our study, MMN was observed for changes greater than 27 cents - shifts of ±50 and 100 cents (effect size - Cohen’s d = 2.259). MMN did not appear for changes of ±10 and 20 cents. The results showed that the values for which motor responses can be observed are indeed lower than those for perceptual thresholds.
    Źródło:
    Archives of Acoustics; 2013, 38, 3; 375-381
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Disturbance-Kalman state for linear offset free MPC
    Autorzy:
    Tuan, Truong Thanh
    Zabiri, Haslinda
    Mutalib, Mohammad Ibrahim Abdul
    Vo, Dai-Viet N.
    Powiązania:
    https://bibliotekanauki.pl/articles/2106504.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Kalman filter
    plant-model mismatch
    offset free MPC
    disturbance model
    Opis:
    In model predictive control (MPC), methods of linear offset free MPC are well established such as the disturbance model, the observer method and the state disturbance observer method. However, the observer gain in those methods is difficult to define. Based on the drawbacks observed in those methods, a novel algorithm is proposed to guarantee offset-free MPC under model-plant mismatches and disturbances by combining the two proposed methods which are the proposed Recursive Kalman estimated state method and the proposed Disturbance-Kalman state method. A comparison is made from existing methods to assess the ability of providing offset-free MPC on Wood-Berry distillation column. Results shows that the proposed offset free MPC algorithm has better disturbance rejection performance than the existing algorithms.
    Źródło:
    Archives of Control Sciences; 2022, 32, 1; 153--173
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation and correction of gain mismatch and timing error in time-interleaved ADCs based on DFT
    Autorzy:
    Guo, L.
    Tian, S.
    Wang, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/221135.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    correction
    estimation
    gain mismatch
    time-interleaved analog-to-digital converter
    timing error
    Opis:
    Time-interleaved analog-to-digital converter (ADC) architecture is crucial to increase the maximum sample rate. However, offset mismatch, gain mismatch, and timing error between time-interleaved channels degrade the performance of time-interleaved ADCs. This paper focuses on the gain mismatch and timing error. Techniques based on Discrete Fourier Transform (DFT) for estimating and correcting gain mismatch and timing error in an M-channel ADC are depicted. Numerical simulations are used to verify the proposed estimation and correction algorithm.
    Źródło:
    Metrology and Measurement Systems; 2014, 21, 3; 535-544
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Education–Employment Mismatch among Ukrainian Migrants in the Czech Republic
    Autorzy:
    Leontiyeva, Yana
    Powiązania:
    https://bibliotekanauki.pl/articles/498785.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Ukrainian migration
    Czech Republic
    utilisation of skills
    education–occupation mismatch
    waste of human capital
    Opis:
    The aim of the article is to provide a brief overview of current labour migration from Ukraine to the Czech Republic and to explore the degree to which Ukrainian labour migrants utilise their skills on the Czech labour market. The analysis, using internal statistical data from the Czech Ministry of Labour and Social Affairs and evidence from specific migrant surveys, is focused on the relationship between the formal education of economically active Ukrainian migrants and their position on the Czech labour market, and the extent to which there is an educational–occupational mismatch. The article analyses the factors that might influence the match between jobs and formal education and the position of Ukrainian migrants in the labour market. Analysis of the educational background of Ukrainian respondents does not seem to support the popular stereotype of the average Ukrainian as a university-educated construction-site worker or a cleaner, primarily due to the fact that the Czech Republic does not only attract well-educated Ukrainian migrants. Nevertheless, a comparison of the educational and occupational structures of Ukrainian migration does provide evidence of a significant waste of human capital.
    Źródło:
    Central and Eastern European Migration Review; 2014, 3, 1; 63-84
    2300-1682
    Pojawia się w:
    Central and Eastern European Migration Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technique to improve CMRR at high frequencies in CMOS OTA-C filters
    Autorzy:
    Blakiewicz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/200504.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    common-mode rejection ratio
    CMRR
    CMOS
    OTA
    differential pair
    OTA-C filters
    component mismatch
    Opis:
    In this paper a technique to improve the common-mode rejection ratio (CMRR) at high frequencies in the OTA-C filters is proposed. The technique is applicable to most OTA-C filters using CMOS operational transconductance amplifiers (OTA) based on differential pairs. The presented analysis shows that a significant broadening of CMRR bandwidth can be achieved by using a differential pair with the bodies of transistors connected to AC ground, instead of using a pair with the bodies connected to the sources. The key advantages of the technique are: no increase in power consumption (except for an optional tuning circuit), a small increase of a chip area, a slight modification of the original filter. The simulation results for exemplary OTAs and a low-pass filter, designed in a 0.35 μm CMOS process, show the possibility of broadening the CMRR bandwidth several times.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 3; 697-703
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A model-free direct predictive grid-current control strategy for grid-connected converter with an inductance-capacitance-inductance filter
    Autorzy:
    Guo, Leilei
    Zheng, Mingzhe
    Yu, Changzhou
    Xu, Haizhen
    Li, Yanyan
    Powiązania:
    https://bibliotekanauki.pl/articles/2202543.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    grid-connected converter
    GCC
    model-free predictive current control
    MFPCC
    parameter mismatch
    robustness
    Opis:
    The disadvantages of the conventional model predictive current control method for the grid-connected converter (GCC) with an inductance-capacitance-inductance (LCL) filter are a large amount of calculation and poor parameter robustness. Once parameters of the model are mismatched, the control accuracy of model predictive control (MPC) will be reduced, which will seriously affect the power quality of the GCC. The article intuitively analyzes the sensitivity of parameter mismatch on the current predictive control of the conventional LCL-filtered GCC. In order to solve these issues, a model-free predictive current control (MFPCC) method for the LCL-filtered GCC is proposed in this paper. The contribution of this work is that a novel current predictive robust controller for the LCL-filtered GCC is designed based on the principle of the ultra-local model of a single input single output system. The proposed control method does not require using any model parameters in the controller, which can effectively suppress the disturbances of the uncertain parameter variations. Compared with conventional MPC, the proposed MFPCC has smaller current total harmonic distortion (THD). When the filter parameters are mismatched, the control error of the proposed method is smaller. Finally, a comparative experimental study is carried out on the platform of Typhoon and PE-Expert4 to verify the superiority and effectiveness of the proposed MFPCC method for the LCL-filtered GCC.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 1; 23--42
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies