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In order to solve the support problem of a fully mechanized coal face under rock burst and with the goal of safe and efficient coal mining, the present study hasenvisaged a hexagon periodic arrangement energy absorption structure. Based on the shell theory, the mechanical model of the impact resistant structure and hydraulic support was constructed using the finite element method. The mechanical properties...
Fullerenes (C60 and C70) films have been fabricated by a thermal evaporation method. Raman spectra for C60 and C70 films were utilized to evaluate the film quality, and atomic force microscopy technique showed the roughness of both films was within the molecular scale of fullerenes. Moreover, these fullerenes (C60 and C70) films were successfully used to fabricate spin-valve devices with an Fe3O4/AlO/fullerenes...
Poly(vinylidene fluoride) (PVDF) was used as an organic spacer to fabricate spin-valve devices for the first time. Their magnetoresistance (MR) effects with different layer numbers of PVDF were investigated at both room and low temperatures. The device resistances and MR ratios increase with decreasing measurement temperature. It is noted that the MR ratios at room temperature are over 2% and 0.5%...
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