燕归梁

双燕归飞绕画堂。似留恋虹梁。清风明月好时光。更何况、绮筵张。 云衫侍女,频倾寿酒,加意动笙簧。人人心在玉炉香。庆佳会,祝筵长。 ①虹梁:华美的房梁, ③笙簧:泛指簧管一类的乐器。 此词为一般的祝寿之作,思想价值不大。与晏殊其它同类词相比。

Determining of Optimal Dimensions of Compliant Spring Guiding Systems

Compliant mechanisms transfer an input force or displacement to another point through elastic body deformation. The field of compliant mechanisms is expected to continue to grow as materials with superior properties are developed. The paper takes into consideration some typical spring guiding systems, being able to realize translating planar displacement of the link. Some types of compound spring guiding systems, such as S-shaped guiding spring system, U-shaped guiding spring system and four spring guiding system with additional rigid-body link have been considered and analyzed as compliant structures. The mobility as well as guiding accuracy of the developed compliant mechanisms, that is, their capability to realize translating planar displacement of the link, have been researched, and the optimal dimensions of the mechanism have been determined in order to provide minimal guiding inaccuracy.

100门纵横制交换机

一、概述七月一日人民日报曾刊载有邮电部邮电科学研究院研制成功我国第一部100门纵横制交换机的消息。现在,这部交换机已经在全国工业交通展览会的预展中展出。这种新式交换机的研制成功,标志着我国已经开始了电话技术的一个新阶段,它引起了我国通信工作者广泛的注意与重视。这部100门纵横制交换机是在没有样机、缺乏资料、设备材料不全。