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    Wyświetlanie 1-7 z 7
    Tytuł:
    A New Fuzzy Iterative Learning Control Algorithm for Single Joint Manipulator
    Autorzy:
    Wang, M.
    Bian, G.
    Li, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/229401.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    iterative learning control
    fuzzy control
    fuzzy gain adjustment
    single joint manipulator
    Opis:
    This paper present a new fuzzy iterative learning control design to solve the trajectory tracking problem and performing repetitive tasks for rigid robot manipulators. Several times’ iterations are needed to make the system tracking error converge, especially in the first iteration without experience. In order to solve that problem, fuzzy control and iterative learning control are combined, where fuzzy control is used to tracking trajectory at the first learning period, and the output of fuzzy control is recorded as the initial control inputs of ILC. The new algorithm also adopts gain self-tuning by fuzzy control, in order to improve the convergence rate. Simulations illustrate the effectiveness and convergence of the new algorithm and advantages compared to traditional method.
    Źródło:
    Archives of Control Sciences; 2016, 26, 3; 297-310
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cloning and characterization of a pathogenesis-related gene (ThPR10) from Tamarix hispida
    Autorzy:
    Zhang, R.
    Wang, Y.
    Liu, G.
    Li, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/19850.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    A PR10 gene (ThPR10) was cloned from Tamarix hispida and characterized. Real-time RT-PCR was employed to evaluate gene expression levels. ThPR10 was expressed in both leaves and roots of T. hispida under normal growth conditions, and can be highly induced in both leaf and root tissues by abiotic stresses including NaCl, PEG, cold, CdCl2, and ABA (abscisic acid) treatments. Our results indicated that ThPR10 is involved in the abiotic stress response, and regulated by an ABA-dependent signaling pathway. Subsequently, ThPR10 was localized at the subcellular level. The gene was fused with the GFP N-terminal driven by CaMV35S promoter and transiently expressed in onion epidermal cells. This strategy localized the ThPR10 protein to the nucleus of onion epidermal cells, suggesting that the pathogenesis-related proteins play a functional role in the cell nucleus.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2010, 52, 2
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Fast Method of Feature Extraction for Lowering Vehicle Pass-By Noise Based on Nonnegative Tucker3 Decomposition
    Autorzy:
    Wang, H.
    Cheng, G.
    Deng, G.
    Li, X.
    Li, H.
    Huang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/177883.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    vehicle pass-by noise
    NTD
    feature extraction
    sound pressure level
    Opis:
    Usually, the judgement of one type fault of vehicle pass-by noise is difficult for engineers, especially when some significant features are disturbed by other interference noise, such as the squealing noise is almost simultaneous with the whistle in the exhaust system. In order to cope with this problem, a new method, with the antinoise ability of the algorithm on the condition by which the features are entangled, is developed to extract clear features for the fault analysis. In the proposed method, the nonnegative Tucker3 decomposition (NTD) with fast updating algorithm, signed as NTD_FUP, can find out the natural frequency of the parts/components from the exhaust system. Not only does the NTD_FUP extract clear features from the confused noise, but also it is superior to the traditional methods in practice. Then, an aluminium-foil alloy material, which is used for the heat shield for its lower noise radiation, replaces the aluminium alloy alone. Extensive experiments show that the sound pressure level of the vehicle pass-by noise is reduced 0.9 dB(A) by the improved heat shield, which is also considered as a more lightweight design for the exhaust system of an automobile.
    Źródło:
    Archives of Acoustics; 2017, 42, 4; 619-629
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preliminary results of spatial distribution of uranium and thorium in soil profi les near a uranium industrial site, Guangdong province, China
    Autorzy:
    Wang, J.
    Liu, J.
    Chen, Y.
    Song, G.
    Chen, D.
    Xiao, T.
    Li, H.
    Wang, C.
    Jiang, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/146530.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    spatial distribution
    thorium
    uranium
    U/Th ratio
    Opis:
    Four soil profiles were collected from locations with different distances (5, 50, 250 and 1000 m) from a uranium mill tailings dam, Guangdong province, China, to investigate the pollution status of the soil in mining/ milling-related areas based on the contents of uranium (U) and thorium (Th), thus to understand the impacts of uranium industrial activities to the surroundings. The U and Th concentrations were determined by inductively coupled plasma mass spectrometry (ICP-MS) after conventional HF-HNO3-HClO4 digestion procedures. The results indicate that the soils within 50 m from uranium tailing were severely contaminated; those in 250 and 1000 m soil samples were observed to be with local background level even though these in 250 m had slightly higher U/Th ratios. Uranium concentrations varied from 5.50 ± 0.27 to 160.55 ± 8.03 mg/kg, with maximum values recorded in an intermediate layer of the 5-m distance soil profile. In comparison, the concentration of Th ranged from 6.02 ± 0.30 to 84.71 ± 4.24 mg/kg, with maximum values observed in the top layer of the 1000-m distance soil profile. The U/Th ratio varied from 0.15 to 11.99 compared with 0.20, 0.22 and 0.26 of the average for Guangdong province, national China and the world, respectively. The mean U/Th of four soil profiles showed a reduction with distance from the uranium mill tailing dam, suggesting the relatively large magnitude of uranium elevation in soils within limited distances.
    Źródło:
    Nukleonika; 2016, 61, 3; 367-371
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improved method for phase wraps reduction in profilometry
    Autorzy:
    Du, G.
    Wang, M.
    Zhou, C.
    Si, S.
    Li, H.
    Lei, Z.
    Li, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/173793.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    phase unwrapping
    zero-padding
    Fourier transform
    carrier-frequency
    profilometry
    Opis:
    In order to completely eliminate, or greatly reduce the number of phase wraps in 2D wrapped phase map, Gdeisat and co-workers proposed an algorithm, which uses shifting the spectrum towards the origin. But the spectrum can be shifted only by an integer number, meaning that the phase wraps reduction is often not optimal. In addition, Gdeisat’s method will take much time to make the Fourier transform, inverse Fourier transform, select and shift the spectral components. In view of the above problems, we proposed an improved method for phase wraps elimination or reduction. First, the wrapped phase map is padded with zeros, the carrier frequency of the projected fringe is determined by high resolution, which can be used as the moving distance of the spectrum. And then realize frequency shift in spatial domain. So it not only can enable the spectrum to be shifted by a rational number when the carrier frequency is not an integer number, but also reduce the execution time. Finally, the experimental results demonstrated that the proposed method is feasible.
    Źródło:
    Optica Applicata; 2017, 47, 2; 295-306
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    One shot profilometry using iterative two-step temporal phase-unwrapping
    Autorzy:
    Du, G.
    Wang, M.
    Zhou, C.
    Si, S.
    Li, H.
    Lei, Z.
    Li, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/173912.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    phase unwrapping
    composite fringe pattern
    Fourier transform
    two-step temporal phase-unwrapping
    Opis:
    This paper reviews two techniques that have been recently published for three-dimensional profilometry and proposes one shot profilometry using iterative two-step temporal phase-unwrapping by combining the composite fringe projection and the iterative two-step temporal phase unwrapping algorithm. In temporal phase unwrapping, many images with different frequency fringe pattern are needed to project, which would take much time. In order to solve this problem, Ochoa proposed a phase unwrapping algorithm based on phase partitions using a composite fringe. However, we found that the fringe order determined through the construction of phase partitions tended to be imprecise. Recently, we proposed an iterative two-step temporal phase unwrapping algorithm, which can achieve high sensitivity and high precision shape measurement. But it needs multiple frames of fringe images which would take much time. In order to take into account both the speed and accuracy of three-dimensional shape measurement, we get a new, and more accurate unwrapping method based on a composite fringe pattern by combining these two techniques. This method not only retains the speed advantage of Ochoa’s algorithm, but also greatly improves its measurement accuracy. Finally, the experimental evaluation is conducted to prove the validity of the proposed method.
    Źródło:
    Optica Applicata; 2017, 47, 1; 97-110
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermally induced damage in hexanitrohexaazaisowurtzitane
    Autorzy:
    Tian, Q.
    Yan, G.
    Sun, G.
    Huang, C.
    Xie, L.
    Chen, B.
    Huang, M.
    Li, H.
    Liu, X.
    Wang, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/358735.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    CL-20
    SAXS
    AFM
    thermal effects
    voids
    Opis:
    The evolution of the microstructure of hexanitrohexaazaisowurtzitane (CL-20) after a thermal stimulus plays a key role in the performance of CL-20. In the current work, microstructural variations of CL-20 caused by thermal treatment were investigated by X-ray diffraction, in situ variable-temperature optical microscopy, atom force microscopy, and small-angle X-ray scattering. A wave-like process, an abrupt volume expansion, movement, and fragmentation of CL-20 particles during phase transition were observed. After the phase transition (160 °C) the CL-20 sample acquired a very rough surface with numerous dimple depressions, and during the thermal decomposition stage (200 °C) a large number of voids were produced in both the bulk and the surface of the CL-20.
    Źródło:
    Central European Journal of Energetic Materials; 2013, 10, 3; 359-369
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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