稳定和扩大退耕还林的几点建议

党的十八届三中全会提出,要稳定和扩大退耕还林、退牧还草范围。当前,我国涉及25个省份、实施已有15年的退耕还林政策规定的资金补贴期限已陆续到期,下一步该如何巩固和扩大退耕还林成果,推进新一轮退耕还林工程,引起了社会的广泛关注。经过对一些重要的退耕还林省份进行实地调研,课题组提出了尽快重启和扩大退耕还林工程、抓紧制定新一轮退耕还林政策和规划、探索建立多途径的退耕还林工程资金保障机制等建议。

Study on Feasibility of Reusable Rocket Launching Technology by Use of Scramjet and Maglev Technologies

The scramjet and maglev engineering technology development and trends at home and abroad are firstly presented in this paper. A new launch mode of space transportation system is proposed based on scramjet and magnetic suspension technologies, and its key technologies required are given. This paper also makes analysis on using scramjet and magnetic suspension technologies to launch a reusable rocket, and the results show that a normal temperature conductor maglev launch system is feasible.