方法采用文献检索方法，在近10年内检出相关论文40余篇，进行阅读和整理。
Methods Using literature retrieval in last 10 years, we found more than 40 papers and read and organized.
本论文的研究背景是从笔者的工作经历出发，阅读了国内外大量相关文献。在此基础上，笔者直接或间接调查了一些企业单位。
The second is that i read a large number of the related literatures which were published at home and oversea ; the third is that i investigated some companies.
论文在收集并阅读大量相关文献和资料的基础上，对盾构隧道施工地表沉降进行了较为深入的研究。
On the base of a large number of relevant papers and literature, the paper studied more in-depth on the ground settlement caused by shield tunneling.
论文在大量阅读相关文献的基础之上，针对DSU子系统进行了全方面的研究和设计。
After consulting many correlative materials information, this paper generally researches and designs the DSU subsystem of CBTC system.
论文在大量阅读相关文献的基础之上，针对DSU子系统进行了全方面的研究和设计。
After consulting many correlative materials information, this paper generally researches and designs the DSU subsystem of CBTC system.
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