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Shi L.-J.,Zhengzhou Institute of Light Industry
Communications in Computer and Information Science | Year: 2012

Cultural study on curriculum, an important subject in the modern course study, is a way of thinking and research method in the curriculum study from the viewpoint of culture. The cultural connotations of sports curriculum can be understood by the interpretation of the concept and cultural identity of sports curriculum. The paper holds that the cultural research on sports course is the needs of curriculum reform and construction, and deals with its framework and content from the macro, meso-level and micro-level. © 2012 Springer-Verlag Berlin Heidelberg.

Ding H.-Q.,Xidian University | Ding H.-Q.,Zhengzhou Institute of Light Industry | Yang J.-W.,Xidian University | Zhao Z.-Y.,Xidian University
Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University | Year: 2010

Based on equal gain combination cooperative spectrum sensing, an adaptive step by step combination cooperative spectrum sensing in cognitive radio (CR) network is proposed. With the change of the Signal-to-Noise Ratio received by CR users, this algorithm can adjust automatically the number of CR users which participate in cooperative spectrum sensing in order to decrease the data overhead produced by spectrum sensing in the cognitive radio network. The formula for computing the average data magnitude from the CR users to the central controller over Rayleigh channels is acquired. Theoretical analysis and simulation results show that the method reduces the average data overhead from the CR users to the central controller under the same detection performance compared with the conventional equal gain combination cooperative spectrum sensing.

Zhang L.,Xian Jiaotong University | Shao J.,Zhengzhou Institute of Light Industry | Han Y.,Xian Jiaotong University
Surface and Coatings Technology | Year: 2011

To understand the effect of substrate microstructure on formation of ZrO2 nanotubes, anodic oxidizations of commercially pure zirconium subjected to surface mechanical attrition treatment (SMATed-Zr), SMATed-Zr annealed at 550°C for 10h and unSMATed-Zr in an aqueous solution containing (NH4)2SO4 and NH4F were investigated. The SMATed-Zr and annealed SMATed-Zr exhibit nanocrystallized surface layers containing high density of grain boundaries compared with unSMATed-Zr. The anodization results show that the formed ZrO2 nanotube layer on the SMATed-Zr is slightly thicker than that on the annealed SMATed-Zr, but thicker than that on the unSMATed-Zr. It is indicated that nanocrystallized Zr is propitious to the growth of ZrO2 nanotubes; and grain boundaries, compared with dislocations, play the leading role in accelerating the reaction rate during anodization, in turn enhancing the crystallinity of ZrO2 nanotubes at top-end. © 2010 Elsevier B.V.

Su E.,Zhengzhou Institute of Light Industry
Advanced Materials Research | Year: 2012

This essay introduces the PHC pile of vertical bearing capacity, level of capacity, capacity and final pressure values, tensile properties, pile the stress mechanism, and the factors that influence bearing capacity, then the useful suggestions of how to design and construct are given. It has vital significance to direct engineer practice, optimize static-pressed pipe-pile foundation design. © (2012) Trans Tech Publications.

Zhang W.,Xian Jiaotong University | Shao J.,Zhengzhou Institute of Light Industry
Journal of Biomedical Materials Research - Part A | Year: 2010

The biomedical properties of novel biodegradable copoly(amino acid)s based on 6-aminocaproic acid and L-proline were analyzed in this article. The cytotoxicity of the copolymer films was tested in vitro using human embryonic kidney (HEK) 293 cells. The cell proliferation, cell cycle, cell apoptosis, and hemolysis of the polymers were also investigated. No significant cytotoxic response was detected statistically by cytotoxicity assay, and the results of cell apoptosis and cell cycle showed that there were no statistically significant differences in them. Generally, the cells spread and grew well on polymer film. Meanwhile, the extent of hemolysis on the polymers was acceptable. Evaluation of cytotoxicity by cell cycle and apoptosis as a supplementary assay is correspondingly discussed in this article. © 2010 Wiley Periodicals, Inc.

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