Hydrogenation properties of mechanically milled Mg2Nio.8Cr0.2-CoO/Al2O3 composites

Mg2Ni0.8Cr0.2-x wt.% CoO/Al2O3 (x=0.5, 1, 2 and 3) composites were prepared by mechanically milling sintered Mg2Ni0.8Cr0.2 alloy and CoO/Al2O3 compound for 45 h. The addition of CoO/Al2O3 compound resulted in the good kinetics properties of hydriding/dehydriding reaction of the composites. The composite with 1.0 wt.% CoO/Al2O3 catalyst could reach the maximum hydrogen absorption capacity (2.9 wt.%) within 5 min at 393 K under H2 pressure of 4 MPa, and can desorb rapidly at 493 K. The decomposition and synthesis of hydrogen molecule on Mg2Ni0.8Cr0.2 alloy surface was promoted by addition of CoO/Al2O3 catalyst. In addition, the formation of metallic Ni particles, strain and defects during the ball milling process also resulted in the improved hydrogenation performance of Mg2Ni-based alloys.     

从汉德民族社交语用看东西方思维方式的差异

汉民族和德意志民族由于不同的文化传统、不同的哲学宗教以及不同的社会发展经历．在思维方式上存在着较大的差异。这种差异从某种意义上来说也代表了东西方文化和思维方式的差异。从两个民族的社交语用上探讨和研究这种差异，对提高跨文化交际能力，避免因不同的文化背景和相异的思维方式而产生的不必要误解具有较大的现实意义。     

结合专业特色应用现代教育技术服务于中小学教学

现代教育技术的应用,深刻影响高中小学各科教学.传统的教学模式必须与现代教育技术进行整合,才能适应新课程教学改革的需要.充分发挥教育技术专业人才的主导作用,担当教育技术现代化的排头兵.     

8253定时/计数器方式3计数过程的实验研究

对于我系选用教材和部分参考资料关于8253定时/计数器在方式3的计数过程中表述中所存在的矛盾之处,基于武汉众友电子科技有限公司的接口实验台,提出了一个探究8253计数过程的实验方案。通过分析实验结果,指出了正确的计数过程。     

国有企业公司化治理模式选择

通过对公司治理结构及国际上常见的几种公司治理模式的分析研究,对我国国有企业改革中关于公司治理结构的现状和问题进行了研究,并结合国有企业改革的实践,对市场型治理模式和组织型治理模式进行了对比分析。     

Three dimensional couette flow and heat transfer through a porous medium with variable permeability

This paper reports research on the effects of variations in injection velocity and permeability on the heat transfer and flow through a highly porous medium between two horizontal parallel plates situated at constant distance with constant suction by the upper plate. Due to this type of variation in injection velocity and in permeability the flow becomes three dimensional. The governing equations are solved by adopting complex variable notations to obtain the expressions for the velocity and temperature field. The skin-friction along the main flow direction and rate of heat transfer are discussed with the help of graphs.     

Consolidation behavior of cement- and lime/cement-mixed column foundations

The consolidation behavior of mixed in place cement- and lime/cement-mixed column was studied. Consolidation of the composite foundation was modeled as a three-dimensional axi-symmetric problem. The authors used the finite difference method to obtain the pore pressure variation with time at any location below the surface. A computer program developed by the authors was used to draw some interesting conclusions about the consolidation behaviors of cement- and lime/cement-mixed pile foundation. Finally, a combined model including the permeability coefficients of cement-mixed piles and soil, was studied and its feasibility was evaluated. Project supported by National Natural Science Foundation of China (No. 59908012) and Education Ministry of China     

中国体育的现代化与思维方式的科学化

中国体育观念的争议及术语滥用现象引发对于中国体育现代化的思考.通过查阅大量文献资料表明,中国体育的现代化与中国体育工作者思维方式的科学化密不可分,改善中国体育工作者简单僵化的思维方式是亟需解决的问题.开放式、多维度的思维方式是完全可以借鉴的.     

高校大学生公寓管理现状分析与管理模式构想

文章针对当前高校大学生公寓管理中存在的问题,结合实际工作经验,提出了加强高校大学生公寓管理模式构想。     

论高校思想政治教育网络平台的建设

随着信息技术的高速发展特别是互联网的日益普及,网络已经成为大学生求知、社交、娱乐的重要途径。高校的思想政治教育要根据这些新的变化,加强在方法、手段等方面的改革与创新,不断拓展思想政治教育的新领域,打造高校思想政治教育的网络平台,整合校内网络资源,使之形成合力,充分发挥高校思想政治教育网络平台的功能和作用,抢占思想政治教育的新阵地。