Showing 201 - 220 results of 486 for search '"fractal"', query time: 0.07s Refine Results
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    Study on Energy Density Distribution and Mass Fractal of Deep Saturated Coal Samples under Uniaxial Stepwise High Stressed Loading and Unloading Path by Xiaoyu Chen, Qiangling Yao, Changhao Shan, Liqiang Yu, Liang Chen, Qiang Xu, Ze Xia, Liu Zhu

    Published 2022-01-01
    “…The instability of deep coal samples is mainly caused by the gradual dissipation of plastic energy to generate cracks and divided into fragments with large and long edge, resulting in low mass fractal dimension. In engineering practice, the loading times should be reduced and the suitable pressure grouting should be conducted timely to delay the deterioration process of crack development in deep water-bearing coal under high stress disturbance.…”
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    Dual-Frequency Miniaturized Substrate Integrated Waveguide Quarter-Mode Cavity-Backed Antenna Based on Minkowski Fractal Gap with Orthogonal Polarization Radiation Characteristics by Zihao Fu, Tianliang Zhang, You Lan, Tianhai Wu, Wenxing Huang, Leilei He

    Published 2019-01-01
    “…A novel quarter-mode substrate integrated waveguide miniaturized cavity-backed antenna loading Minkowski fractal gap is presented in this paper. Firstly, the resonant frequency of the rectangular substrate integrated waveguide resonator is reduced by etching the fractal gap in the resonator to achieve miniaturization. …”
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    Pore Structure, Fractal Features, and Oil Content Evaluation of Lacustrine Shale: A Case Study of First Member of Paleogene Shahejie Formation, NE China by Enze Wang, Gang Chen, Hanqi Li, Yanchen Song, Jianwei Wang, Zhuoya Wu, Yue Feng

    Published 2021-01-01
    “…Moreover, the mesopores contribute the most specific surface area (SA) and pore volume (PV) to the samples (average contribution rates of 74.7 and 75.0%, respectively). The fractal dimensions have relatively strong positive correlations with PV and SA, which means more heterogeneous and complex pore structures provide more storage space and adsorption sites for shale oil accumulation. …”
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    Miniaturization of a Microstrip Patch Antenna with a Koch Fractal Contour Using a Social Spider Algorithm to Optimize Shorting Post Position and Inset Feeding by Eduardo A. M. Souza, Phelipe S. Oliveira, Adaildo G. D’Assunção, Laércio M. Mendonça, Custódio Peixeiro

    Published 2019-01-01
    “…Two antenna miniaturization techniques, based on the use of a Koch fractal contour and a shorting post (connecting the patch to the ground plane), are combined to enable a major size reduction. …”
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