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SiO2f/SiO2 composites were fabricated by sol-gel method, and then the effects of high-temperature (1000–1400 °C) annealing on the microstructure and mechanical property were discussed and compared. The results showed that the composites underwent obvious structural changes after high-temperature annealing. High-temperature annealing markedly affected the mechanical property that decreased with increasing...
Non-tradable share reform has become one of important factors which affected capital market to sustain develop in China. Nowadays, non-tradable share reform is being comprehensively carried on to realize share all-circulation of the capital market in China. This paper established a bargainer strategy model considering share all-circulation of Chinese security market firstly, then got several hypotheses...
Bundles of pure carbon nanofibers were prepared by catalytic decomposition of acetylene on foam Ni. The morphological and structural characteristics of the carbon nanostructures, in the as-prepared state, were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HTEM). A special conformation of carbon nanofibers...
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