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, the microwave reflectivity shifts from high frequency to low frequency. However, the thickness of the coatings should be less than 1 mm restricting with the tensile strength of the coatings. When the mass..., the reflectivity coefficients are all less than -10 dB. The simulated result shows that the microwave absorbing performance of the coatings is the best when the mass fraction of β-SiC is 46%. Key......
Frequency-dependent dynamic effective properties of porous materialsPeijun Wei and Zhuping Huang Applied Science School, University of Sciences and Technology Beijing, Beijing 100083, China Department of Mechanics and Engineering Sciences, Peking University, Beijing 100080, China摘 要:<正>The frequency-dependent dynamic effective properties (phase......
are consistent with that from other methods. It is shown that the model here is feasible and effective in evaluating rock mass quality. Moreover, particular score of each sample can be computed...于同一级的样本也可以排出它们的优劣顺序,因而具有较高的分类精度,为岩体质量评价提供了一种较好的新方法.关键词:分形插值模型；分维数；岩体质量；评价Evaluation of rock mass quality based on fractal interpolation modelWANG Wei1, 2, SU Jing-yu1, MA Dong-hui1, TIAN Jie2(1......
. Furthermore, dislocation glide and twinning are dominant deformation mechanisms at higher strain-rate. The processing map, the effective diffusion coefficient and activation energy map of the alloy were... rate range from 7×10-3 to 2×10-3 s-1. Key words: magnesium; AZ31B alloy; twin-roll cast; processing map; dislocation creep; effective diffusion coefficient ......
J. Cent. South Univ. Technol. (2011) 18: 108-115 DOI: 10.1007/s11771-011-0667-9 Modal analysis on transverse vibration of axially moving roller chain coupled with lumped mass XU Li-xin(许立新)1... with lumped mass were analyzed. The chain system was modeled by using the multi-body dynamics theory and the governing equations were derived by means of Lagrange’s equations. The effects......
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ARTICLE J. Cent. South Univ. (2019) 26: 1271-1282 DOI: https://doi.org/10.1007/s11771-019-4086-7 Variable mass and thermal properties in three-dimensional viscous flow: Application of Darcy law.... Features of heat transport are characterized with Newtonian heating and variable thermal conductivity. Mass transport is carried out with first order chemical reaction and variable mass diffusivity......
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Ultrahigh performance of Ti-based glassy alloy tube sensor for Coriolis mass flowmeter MA Chao-li(马朝利)1, A. INOUE2, ZHANG Tao (张 涛)1 1.School of Materials Science and Engineering, Beijing... that the Coriolis mass flowmeters using the Ti-based glassy alloy sensor tube exhibit excellent measurement sensitivity, viz. 28.5 times higher than that of the conventional flowmeter manufactured using......
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