为提高编制工艺规划的柔性跨出一步─—借助基于知识的方法,编制跨零件类别的工艺规划

开发一种模块式的跨零件类别的工艺规划模型是一项课题的目的，它包括各种不同的方法。自1991年5月起，德意志研究联合会开始资助该课题，课题实施单位是斯图加特的弗朗霍夫生产技术与自动化研究所（IPA）和Chemnitz－Zwickau工业大学的制造与生产信息科学研究所（IFP）。具体描述了如何能利用相融合的传统算法和基于知识的方法兼村回转体和棱柱体工件编制工艺规划。     

一阶与二阶泛函微分方程的边值问题

本文考虑以下泛函微分方程的边值问题：“ｘ＇（ｔ）＝ｆ（ｔ，ｘｔ）（０≤ｔ≤ｂ），ｘ０＝ｘｂ″及“ｘ“（ｔ）＝ｆ（ｔ，ｘｔ，ｘ＇（ｔ）（０≤ｔ≤ｂ＿，ｘ０－ψ，ｘ（ｂ）＝Ｂ”。利用基于度理论的不动定理，给上述边值问题有解的某些充分条件。     

网络管理的进展

网络管理的进展理查德·温德克尔博士ＡＴ＆Ｔ贝尔实验室网络管理研究部技术经理一、网络管理美国电报电话公司的系统是非常好、非常可靠、非常灵活的。网络话务量管理（ＮＴＭ—ＮｅｔｗｏｒｋＴｒａｆｆｉｃＭａｎａｇｅｍｅｎｔ）是当话务量过负荷（或故障）而使网络处...     

THE INFLUENCE OF SCREEN PARAMETERS ON PERFORMANCE CHARACTERISTICS

A series of laboratory screening tests have been performed with the objective of evaluating the effect of feed rate, screen length and screen motion on the quality of separation. The separation performance has been evaluated by the use of proposed ISO Standard measures which are based on the partition curve. The laboratory rig, the test programme and results derived from it are discussed. The effect of screen length, feed rate and screen motion on the levels of screen performance as indicated by these measures and a normalised separation size parameter are discussed in relation to the assumed screening conditions for the tests reported and conclusions are summarised.