But, presently the research on damage detection and diagnosis of structure focus on bridge and tier building, and the research on large space structures are few.
但是，目前结构的损伤检测与诊断研究多集中在桥梁、高层等结构上，针对大跨度空间结构损伤检测与诊断的研究很少。
It is more importance to research on the developing technology of the multi-tier system for improving the level of the applied software oriented enterprise.
因此对多层体系结构系统开发技术的研究对提高我国企业级应用软件开发水平具有重要意义。
It is more importance to research on the developing technology of the multi-tier system for improving the level of the applied software oriented enterprise.
因此对多层体系结构系统开发技术的研究对提高我国企业级应用软件开发水平具有重要意义。
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