浅析中职体育教师应具备的基本素质

为了深化素质教育改革,贯彻教育部有关指示精神,加强体育师资队伍的建设,本文通过分析当今学生现状、社会、企业及教学改革等方面的需求,分析中职学校体育教师在学校教学改革过程中除应具备教师的基本素质外,还应具备不断更新观念、提高业务能力、教学改革与创新能力、“市场化”理念方面的素质,进一步运用到体育教学当中,以便更好的服务于中职体育教学,为建设高素质的体育师资队伍提供客观的依据。     

Virtual Prototype Simulation and Reliability Analysis for Drive System of Armored Chassis

Drive system is the key device of armored chassis. Its working state and reliability influence the maneuver performance of armored chassis directly. In order to simulate the failure process and evaluate the service reliability of drive system in training or battle missions,a new kind of dynamic simulation model and driving simulation platform of the complete drive system were established based on virtual prototype and finite element technology in this paper. Using the platform, the kinematics and dynamic characteristics of drive system were studied and analyzed in detail,the dynamic load spectrum of key components was obtained,the service life was predicted, and the service reliability evaluation results were provided. A simulation example of transmission gear was shown to illustrate the simulation and evaluation process. The result proves that the simulation method not only can be used to compute and evaluate the service reliability of complex mechanical mechanism, but also has high precision and reasonable computational cost. Therefore,simulation and reliability analysis based on virtual prototype of the armored chassis drive system will provide scientific reference for the formulation of armored chassis reasonable repair cycle.     

Matlab编程快速实现振幅型菲涅尔波带片的设计

利用Matlab编程实现对菲涅尔波带片狭缝方程的可视化,为照相法制作振幅型波带片提供图样。结果表明：该方法生成图样时间短、效率高。最后分析了影响图样设计精度的因素,并得出结论：波带片焦距越短或者波带片半径越大,精度越低;计算点数越少,精度越低。     

水利水电建设项目管理实施方法探讨

在20多年的水利水电工程建设发展中,越来越多的项目管理工作成功运用于大型、巨型水利水电工程项目建设,并收到一定功效。通过10年的项目管理工作体会,对水利水电工程建设项目管理"四控制、一协调"的实施进行深入探讨。