装配式防撞墙生产运输工艺的研究及应用

装配式防撞墙预制不以特定边梁为基础,可灵活应用于新建、改建、大修工程中,具有“工厂化、标准化、绿色化”等优点。为提升装配式防撞墙施工质量,推进其定型化生产进程,对预埋件、模板、钢筋、混凝土等分项工程和防撞墙存放、翻身、运输等关键工艺进行了系统介绍及优化;并以上海市S32公路昆阳路立交匝道新建工程为背景,对优化后的工艺进行了验证。文章还对节段防撞墙的发展方向进行了展望。

The quantified analysis of China's GM cotton yield capacity by C-D function and stochastic frontier model

Using a modified C D function and stochastic frontier model, the paper analyzed China's cotton yield capacity and found that the yield and technical efficiency of China's cotton planting system can be increased by the use of genetically modified (GM) varieties.