This article appreciates and expounds the story in the red chamber according to the seasonal change order,aiming at probing into another new perspective in interpreting the red chamber.It also tries to explain and modify some secrets in the red chamber,aiming at reflecting the natural soul of Cao Xue-qin and the actual behaviours.

Based on the location error of V-block,dimensional chain theory and methods are applied to achieve the technological sign of the equal and unequal cross-section shafts in this paper,meanwhile,the paper describes the solution of calculating the error of every ring in the dimensional chain.

As one of the technologic dimensional chains,the fiat dimensional chain is more complicated which need to be calculated in the assemble technology as well as the machining of box holes and oblique holes.in this paper,differentiation principle is principle to handle fist dimensional tolerance,not only simplifying the process of analysis,but also improving the accuracy and rationality of calculation because of considering the angular deviation.that Is usually ignored by the engineer.in the other hand,the two formulas of holes coordinate are firstly deduced in this paper.The author think that will further perfect the theory of dimensional chains.

This paper advanced two plans of direction and technology to atfempt sowe the spacecraft's hear insulating corers cut off of U.S.A.

本文主要介绍并联机床的结构特点和设计理论,并对关键技术和发展趋势作了分析.

In the course of designing the jig and fixture, designing and calculating technologic hole is a difficulty to the designer,and there are few data dealing with this subject. In this paper,the author put forwards the plane dimensional chain and differentiation to solve this problem. It can not only facilitate the process of calculation, but also improve the accuracy of result. The method of designing and calculating the technology holes is illustrated in detail by two representative examples.

A Dream of Red Mansions” is a canon in Chinese culture,in which and out of wh ich,whatever is being discussed.This paper deals with the problem in what season “ Baoyu dreamed wandering in the Tai Xu”.The author disputes against two popul ar views in this field,i.e.the summer and the winter,then raises five arguments at the first time to show that it happened in the spring.

"试论"一文在本刊发表后,(1995.第1期)受到经济界和出版界人士的重视.本文在"试论"的基础上,再进一步探讨和补充关于管理职能实施的有效性和由此引起的企业经济损失,并对所界定的"管理"定义,重新作了说明.