或固有缺陷构成的[5]。对管道的外层装涂以及电化学保护是提升埋地管道抗腐蚀性的主要方法。但是，这个方法通常存在一个缺陷一如果涂层装涂不当或与管道不适配，那么电化学保护层的防护能力就会...

AbstractLightning disaster seriously affects people's normal life,from the damage offacilities to the occurrence of large-scale blackout accidents,so the prevention oflightning dis...

Research On The Efficiency Improvement Method Of30KW Wind Turbine[Abstract]Wind power has gradually become an important component inthe current power generation system.Through more...

The design of a 65 ton cold storageAbstractThe location of this design is Zhuhai City,the design of a 65-ton small coldstorage It is for the storage of fresh fruit and vegetable pr...

目录第1章绪论21.1课题研究的背景和意义…21.23D打印机的分类与基本原理分析31.2.13D打印机的分类..31.2.2基于FDM技术的3D打印机的工作原理.71.3基于FDM技术的3D打印机国内外研究现状.91.3.1国...

Abstract3D printing technology is a rapid prototyping technology.which has entered astage of rapid development during the past few years.The world has made a greatprogress and has ...

本科论文摘要CA6140型车床是车床中使用最广泛的一种四，它具有以下特点：机床刚性好，抗振性能好，可进行高速强力切削和重载荷切削：机床操纵手柄集中，安排合理，是工人操作最频繁的部件；机床...

ABSTRACTBinary differential phase shift keying modulation is relatively short two-phase,denoted by 2DPSK.It is one of the most commonly used modulation in datacommunications,this a...

本科论文4.4驴头…304.5横梁.…304.6抽油机装配体31结论32参考文献33致谢.35

AbstractIn the electromechanical drive control system,there are many motor control algorithms and means,the earliest developed simulation PID control has already formed a typical s...