基于Pro/E的直齿锥齿轮Program参数化造型

介绍Pro/Engineer的Program参数化造型方法及其程序结构,并且以直齿锥齿轮为实例,详细地介绍Program参数化造型的实现过程。为同类产品实现参数化造型,减少重复劳动,提高设计效率提供一种适用、有效的方法。     

Visual Basic中的菜单设计原则和编程技巧

论述标准Windows应用程序界面设计的基本原则,主要是菜单的设计原则。以及在VB环境中菜单制作的方法和动态菜单实现。     

谈游记的特点与写作要求

游记这种文体随着旅游业的发展而更加成熟、更显重要 ,它是作者在旅游中所见所闻所感的记述 ,是作者思想感情与自然人文画面融为一体的美文。篇中有“我” ,情景融合 ;捕捉特点 ,寻找角度 ;移步换形 ,注意穿插 ;勾勒风俗画等 ,是写作游记的基本方法。     

电大校园网的发展方向

计算机技术和通信技术已成为信息技术的主体，校园网的建设势在必行，校园网有特定的需求对象，在设计网络性能方面应注意总体规划和分步实施相结合，注重应用系统的建设和网络的若干选择。     

小学生共处状况调查报告

江苏省无锡五爱小学提出建构“学会共处”德育模式。为准确把握本校学生共处现状及影响因素,课题组在全校范围开展问卷调查。通过对调查结果的分析,有针对性地提出教育建议,为共处模式的建构提供依据。     

情境教学在《秘书实务》课中的运用

情境教学利于培养大学生的创新意识与实践能力.在大学<秘书实务>课教学中,恰当设置教学情境,引导学生在情境中探究学习、"亲身"体验、多角度思考,可加深学生对知识的理解与把握,从而培养学生提出问题与解决问题的能力.     

脱铝超稳Y沸石对α—蒎烯异构化反应的催化动力学研究

脱铝超稳Y沸石催化α—蒎烯异构化反应结果表明,此反应属一级反应,溶剂和反应温度对反应速度的影响十分显著,以1,4—二氧六环为溶剂时,表观活化能为7.53×10~3KJ/mol。     

坚定课程改革坚持办出特色--南京市财经学校课程改革的思考与探索

南京市财经学校是一所财经类中等职业学校,创办二十余年,毕业生六千余名,其中80%在金融、税务部门工作.一所中等职校能创造如此之好的社会效益,其中不乏可资借鉴之经验.本文拟从学校如何适应市场需要坚持课程改革总结若干经验,说明职业学校发展必须遵循的规律.     

Visualization of structured packing with laser induced fluorescence technique: Two-dimensional measurement of liquid concentration distribution

A method of using laser induced fluorescence(LIF)technique was applied to two-dimensional measurement of the liquid concentration distribution in the 250Y structured packing sheet. The experimental structured packing sheet was made of perspex so that the laser could pass through it. The visualization of the distribution of the liquid concentration in the structured packing sheet was realized. The calibration of the thickness and liquid concentration was carried out firstly and the regression formula I=kcd was acquired, in which concentration c and the liquid film thickness d were both considered. Then the liquid feed of uniform tracer(rhodamine)concentration entered the perspex structured packing from the top under different spraying densities. The corresponding thickness of liquid film on the packing was calculated. Finally, tracer(rhodamine)with a high concentration was injected only at one fixed point of the structured packing under different spraying densities of the liquid. With the known liquid film thickness, the concentration distribution of the tracer can be calculated inside the structured packing sheet.     

Isolation and characterization of a novel strain (YH01) of Micropterus salmoides rhabdovirus and expression of its glycoprotein by the baculovirus expression system

Journal of Zhejiang University-SCIENCE B - As one of the most important aquatic fish, Micropterus salmoides suffers lethal and epidemic disease caused by rhabdovirus at the juvenile stage. In this...