市政道路工程软土地基施工技术探析

市政道路工程中经常会遇到软土地基处理,处理方式有表层处理法、置换法、加载法、竖向排水法等多种方法。掌握各种方法的技术特点才能因地制宜的应用到实际中去,防止发生路基沉降等质量问题的出现。

谈谈市政工程道路的施工技术与质量管理

市政工程道路的施工技术与质量管理是道路建设当中主要组成部分,对于符合道路施工设计标准和满足日后的使用要求具有极其重要的作用。因此,本文主要分析市政工程道路的施工技术与质量管理。

In-situ strain measurement and error analysis of arc welding with 2D digital image correlation

The deformation and residual stress generated by the welding process can seriously affect the use of components.As a result,it is very important to understand the evolution of stress and strain during the welding process.The strain measurement method based on digital image correlation(DIC)is an excellent method to detect welding strain and residual stress.The out-of-plane translation and out-of-plane rotation introduce errors to the two-dimensional DIC.In this paper,the causes of errors are analyzed theoretically,and the formulas of errors caused by the out-of-plane displacement and the out-of-plane rotation are derived.The out-of-plane translation experiment and the out-of-plane rotation experiment were carried out to verify the theory,and the experimental results are consistent with the theoretical analysis results.The error caused by the out-of-plane translation can be reduced by increasing the object distance;the error caused by the out-of-plane rotation is greatly affected by the rotation angle.

超微红茶粉的理化性质和抗氧化活性的研究

本文采用超微粉碎技术制备超微红茶粉,研究超微粉碎时间对红茶粉末的显微结构、功能特性、流动性及抗氧化活性的影响。结果表明,超微粉碎改善了红茶的理化性质,增加了功效成分溶出率,提高了其抗氧化活性,其中20 min粉碎时间制得的超微红茶粉理化性质变化显著,30 min粉碎时间制得的超微红茶粉抗氧化活性较强。

如何培养学生的记忆能力

教师的课堂教学是对学生各方面能力的综合培养。培养学生的记忆能力只是其中的一个方面．它与观察问题、分析问题和解决问题等能力是相辅相成的。它本身又有一定的规律。我在几年的教学工作中在这方面做了一点探索。现总结如下：