西安市部分高校中年男教师健康与体育健身状况的调查分析

通过调查与分析表明。西安市部分高校中年男教师的健康状况和体育健身的现状令人忧虑．提出了如何唤起中年男教师对自身健康的重视以及自觉投入到体育健身队伍中的方法和手段．使他们以良好的精神面貌和健康的体魄为国家的教育事业做出更大的贡献。     

市场驱动--我国高等教育改革发展的鲜明特征

10多年的高等教育改革贯穿了一条清晰的主线 :以市场为导向 ,以市场为标准来发展和检验我国的高等教育。本文分析了促使高等教育面向市场的客观环境 ,探讨了市场经济基本原则在高教中的广泛运用和市场驱动的两层含义     

俄罗斯中等职业教育的现状及发展趋势

俄罗斯中等职业教育是国家教育体系中一个重要的组成部分。中等专业学校是国家经济发展中普通技术人才的主要培养基地，20世纪90年代，中等职业教育经历了重大变革，近些年来有了稳步的发展。分析、研究俄罗斯中等职业教育的现状，并在此基础上预测俄罗斯中等职业教育的发展趋势，对我国中等职业教育的发展将有一定的启示和借鉴。     

Numerical investigation of cavitating flow behind the cone of a poppet valve in water hydraulic system

Computational Fluid Dynamics (CFD) simulations of cavitating flow through water hydraulic poppet valves were performed using advanced RNGk-epsilon turbulence model. The flow was turbulent, incompressible and unsteady, for Reynolds numbers greater than 43000. The working fluid was water, and the structure of the valve was simplified as a two dimensional axisymmetric geometrical model. Flow field visualization was numerically achieved. The effects of inlet velocity, outlet pressure, opening size as well as poppet angle on cavitation intensity in the poppet valve were numerically investigated. Experimental flow visualization was conducted to capture cavitation images near the orifice in the poppet valve with 30° poppet angle using high speed video camera. The binary cavitating flow field distribution obtained from digital processing of the original cavitation image showed a good agreement with the numerical result. Project supported by the National Natural Science Foundation of China (No. 59835160) and Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry of China (No. 50175097)     

论影视艺术中声音的美学特性

声音的出现是电影发展史上的一次革命，本文从人声、音乐、音响三个方面述了影视艺术中声音的美学特性。     

计算机的网络安全

计算机网络是一个分层的体系结构，对每一层都有其有代表的物理设备，每一层都有其相应的服务与协议，而网络安全就渗入到每一层中，采取相应的网络设备和安全策略，从传输技术上分类的两种网络：局域网和广域网采取了不同的安全方法。     

Phase Transformations of Graphite and Carbon Black by Laser with Low Power Density

The structure phase transformations of graphite and carbon black induced by pulsed laser were studied in this paper.Under irradiation with laser beam of 1.06 μm wavelength and power density of 106 W·cm-2,both graphite structure and carbon black structure were changed obviously.The results of Raman analyses and Transmission Electron Microscopy(TEM)observations show that graphite transforms into nanodiamond about 5 nm and carbon black is graphitized.It is demonstrated that graphite is the intermediate phase in the transformation from carbon black to diamond,and graphite is easier to transform into diamond by laser irradiation than carbon black.     

基于供需平衡理论对辽宁本科英语翻译专业发展问题的必要性研究

本论文围绕基于供需平衡视角下的辽宁高校英语翻译专业发展现状和提升路径两部分展开。本论文拟从教育学、社会学和管理学的视角审视目前辽宁高校英语翻译专业存在的问题。本研究主要是在借鉴教育经济学中人才供需理论的基础上,深入挖掘辽宁高校英语翻译专业自身的特点与性质以及市场供需之间的关系,以供需平衡的视角应对目前英语翻译专业发展的困境,进而找到优化学科发展,提升学生就业能力的路径。     

西北民族地区高等理科教育改革初探

本文首先从历史的角度,分析了西北民族地区高等理科教育发展状况,并深入探讨了西北民族地区高等理科教育存在的主要问题,然后结合民族地区社会经济发展特点和民族学生学习特征,有针对性地提出了西北民族地区高等理科教育改革思路.