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Wyszukujesz frazę "Dong, Z." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Model of line-of-sight ultraviolet propagation
    Autorzy:
    Li, B.
    Wang, Hongbo
    Mao, Z.
    Dong, Z.
    Zhang, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/174219.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ultraviolet communication
    bipyramid model
    scattering characteristic
    line-of-sight (LOS) communication mode
    Opis:
    The traditional line-of-sight ultraviolet model cannot serve better for link performance study for the reason that the scattering characteristic is often ignored in the modelling process. Therefore, a line-of-sight ultraviolet bipyramid model in combination with transceiver full beam angles and geometrical relationship of the transceiver field of view intersection is established. The theoretical rationality of the bipyramid model in comparison with a traditional line-of-sight model is demonstrated by the classically analytical model for line-of-sight scenario. Based on a bit error rate requirement of voice communication, the effects of transmitting power versus range for three line-of-sight ultraviolet communication modes are further analyzed.
    Źródło:
    Optica Applicata; 2014, 44, 4; 601-610
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quantum-inspired particle swarm optimization algorithm with performance evaluation of fused images
    Autorzy:
    Le, Z
    Xinman, Z.
    Xuebin, X
    Dong, W.
    Jie, L.
    Yang, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/174501.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    multifocus image fusion
    quantum particle swarm optimization
    perfect reconstruction
    superior speed
    Opis:
    In order to improve and accelerate the speed of image integration, an optimal and intelligent method for multi-focus image fusion is presented in this paper. Based on particle swarm optimization and quantum theory, quantum particle swarm optimization (QPSO) intelligent search strategy is introduced in salience analysis of a contrast visual masking system, combined with the segmentation technique. The superiority of QPSO is quantum parallelism. It has stronger search ability and quicker convergence speed. When compared with other classical or novel fusion methods, several metrics for image definition are exploited to evaluate the performance of all the adopted methods objectively. Experiments are performed on both artificial multi-focus images and digital camera multi-focus images. The results show that QPSO algorithm is more efficient than non-subsampled contourlet transform, genetic algorithm, binary particle swarm optimization, etc. The simulation results demonstrate that QPSO is a satisfying image fusion method with high accuracy and high speed.
    Źródło:
    Optica Applicata; 2013, 43, 4; 679-691
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Depth-resolved measurement of the compression displacement fields on the front and rear surfaces of an epoxy sample
    Autorzy:
    Zhang, W.
    Dong, B.
    He, Z.
    Xie, S.
    Zhou, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/174399.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    depth-resolved measurement
    compression displacement field
    wavenumber-scanning interferometry
    epoxy
    Opis:
    Compression is one of the typical parameters measured in material mechanics. In this research, the compression displacement fields on the front and rear surfaces of an epoxy sample are measured by using a tilt depth-resolved wavenumber-scanning Michelson interferometer. The light source is a distributed feedback laser diode, the wavenumber of which can be modulated to about 1.017 × 104 m–1 by the temperature without mode hopping. A random-sampling Fourier transform is designed to evaluate the phase differences before and after the applied loads. Experimental results show that the depth-resolved measurement of the compression displacement field is of high accuracy. It can be used to analyze force propagation inside resin-based composites.
    Źródło:
    Optica Applicata; 2018, 48, 2; 311-323
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Regional features analysis of plugged holes of dense phase gas-solid separation fluidized bed
    Autorzy:
    Zhang, B.
    Zhao, Y.
    Luo, Z.
    Song, S.
    Duan, C.
    Dong, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/109699.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    gas-solid fluidized bed for separation
    pressure fluctuation
    plugged holes regions
    features analysis
    plugged holes sensitivity
    Opis:
    In contrast to traditional coal separation, dry separation does not require water and does not cause water pollution. Dense phase gas–solid fluidized beds are used for dry separation. The plugged holes in the air distributor should be tested to ensure the stability of these beds for particle separation. The pressure fluctuation is sensitive to these plugged holes. This sensitivity can be tested and diagnosed by determining the standard deviation of the pressure fluctuation. In areas with partial blockage, that is the areas with weak fluidization, a decrease in the volume fraction of the particles and in the pressure differences in the transverse of the bed results in an increase of the standard deviation of the pressure fluctuation, thereby stimulating the lateral mixing of medium-sized particles. The standard deviation and the mixing intensity decrease axially. The value of sensitivity of the plugged holes in the air distributor decreases as the height of the bed increases. The features of air distributors affect the surrounding areas. The distribution law determining the influence of plugged holes on the beds is symmetrical. As the blockage of the fluidized bed distributor region increases, the mean square error of the pressure fluctuation in the related regions increases. The intensity of the effect is proportional to the distance to the plugged holes.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2014, 50, 2; 667-679
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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