建筑卷扬机卷筒端侧板强度的理论分析与试验研究

本文依据理论分析、光弹性试验、电测试验并经数学拟合,建立了卷扬机卷筒端侧板强度计算公式.     

组合逻辑电路的无反变量输入设计

本文阐述了组合逻辑电路无反变量输入的设计思想，并通过设计实例给出了具体的设计方法与步骤．     

独立数≤5的3-边连通简单图的上可嵌入性

结合边连通度，本文探讨了3-边连通简单网的独立数与上可嵌人性的关系，我们得到了下列结果：设G是一个3-边连通简单图，α（G）是G的独立数，若α／（G）≤5，则G是上可嵌入的，同时我们又得到了两个在3-边连通意义下最小的非上可嵌入图例．     

碳酸钕对AZ91合金组织的细化和腐蚀性能的影响

通过介绍实验条件实验方法及结果,并对其进行讨论,研究碳酸钕对A291合金组织的细化和腐蚀性能的影响。     

PRELIMINARY STUDY ON RETRO-REFLECTIVE COATED PAPER BASED ON MICROGLASS BEADS

INTRODUCTIONThe micro-glass bead[1-2] is a new kind of silicate material, with good properties of chemical stability, mechanical strength as well as electro-resistance. When its diameter is below 0.08mm and the reflective index is in the range of 1.9~2.1, retro-reflective characteristics can be achieved. When a beam of ray from any direction irradiates the surface of the micro-glass beads, it can be converged at the special reflective layer consisted of focuses of micro-glass beads, owing …     

Study on the Elasticity-Plasticity-Stickiness of the Railway Crushed Stone Ballast

This paper is mainly aimed at the mechanics characteristic elas of ticity-plasticitystickiness existed in the CWR (continuously welded rails) track plane of the railway crushed stone ballast. As an important mechanics parameter of the CWR track plane, the ballast resistance is mainly influenced by this mechanics characteristic. Through the systematic experimental research and the theoretical analysis, this mechanics characteristic of the ballast resistance is revealed and a reasonable theoretical model is built for it. This study set a sound foundation for further studying the CWR track deformation property. It will be beneficial to the development of high-speed railway in China.     

美国五次并购浪潮及其历史背景

美国历史上曾发生过五次大的并购浪潮，对这段历史进行研究，对于进一步加强对我国并购活动管理工作具有重要的指导意义。     

探索学生学习效能的提高--兼数学教学活动

学生学习效能差异很大，这和内外因的各种因素有关，文章着重激发学生学习中的内驱力和教师教学方法等外驱力的作用展开探讨．     

磁放大器原理及执行器故障分析

论述了磁放大器的工作原理和特点 ,介绍了磁放大器在执行器中的应用 ,对执行器的两种常见故障作了分析