CAD教学与研究——如何快速掌握AUTOCAD绘图系统

本文从AUTOCAD教学和应用出发,重点论述了使用AUTOCAD进行机械产品图绘制时的基本思想,主要绘图方法和绘图技巧,使学生尽快地掌握使用计算机绘图系统,绘制出机械工程图纸。

Permanent deformation and deformation compliance of guss-asphalt for orthotropic steel deck plate surfacing

Indentation test and bending test were adopted to investigate permanent deformation and deformation compliance of guss-asphalt for orthotropic steel deck plate. Factors of mastic Epure content, fine to coarse aggregate proportion, temperature and loading pressure were investigated. It is pointed out that mastic Epure content, temperature and loading pressure are the main factors influencing permanent deformation of guss-asphalt; fine to coarse aggregate proportion influences its maximum bending strain and crack energy at low temperature. The results indicate that there exists an optimum mastic Epure content, and a critical operation temperature as well as a critical loading pressure for guss-asphalt in operation.

关于十九世纪英国浪漫主义诗歌的几个问题

最近看到了一些关于十九世纪英国浪漫主义诗歌的书籍或文章,觉得似乎有必要对当时的几个主要诗人的哲学思想和文艺思想作些探讨,以便对英国诗歌中这一重要发展阶段的某些名作的内容和写生有较深刻一点的理解。 问题之一是华兹华斯、柯勒律治和雪莱的大自然的观点的最主要的内容究竟是什么。有的书说,华兹华斯规避积极的生活斗争,寄情山水;又说华兹华斯在政治上失意以后,大自然便成为他不可或缺的托身之地。