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浏览/检索结果: 共5条，第1-5条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择发表日期升序发表日期降序作者升序作者降序提交时间升序提交时间降序题名升序题名降序 微细电火花热作用机理及工件表面形貌研究 学位论文 2016, 2015 王春梅 收藏  |  浏览/下载：3/0  |  提交时间：2017/06/20 微细电火花  热源模型  热作用机理  重铸层  表面形貌。  micro-EDM, Heat source model, the thermal effect mechanism, recast layer, Surface morphology   Finite element analysis of thermal effect on large thick titanium alloy electron beam welding with different focus 会议论文 Melbourne, VIC, Australia, January 15, 2012 - January 16, 2012 作者:  Zhang, Binggang;  Chen, Guoqing;  Guo, Wei;  Shi, Mingxiao 收藏  |  浏览/下载：0/0  |  提交时间：2020/11/15 Computer simulation  Electron beam welding  Finite element method  Mechanical engineering  Morphology  Thermal gradients  Thermocouples  Titanium alloys  Cross-section morphology  Finite element models  Gaussian surface  Heat source models  Heat sources  Molten pool  Peak temperatures  Simulated results  Surface temperatures  TA15 titanium alloy  Temperature field  Temperature gradient  Thermal cycle curve  Weld morphology   Thermal model for laser-induced discharge surface strengthening 期刊论文 Surface Review and Letters, 2011, 卷号: 18, 期号: 6, 页码: 289-296 作者:  Zhou ZQ(周终强);  Wang ZT(王之桐) 收藏  |  浏览/下载：26/0  |  提交时间：2013/02/28 Laser-induced discharge  surface strengthening  thermal model  heat source   Developing of in-suit long trance profiler for testing slope error of aspherical optical Elements (EI CONFERENCE) 会议论文 ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China Zhou C.; Li H.; Chen C.; Zhou C.; Qian S. 收藏  |  浏览/下载：25/0  |  提交时间：2013/03/25 Profile error of super smooth surface of optical elements at X-ray/EUV in synchrotron radiation (SR) light beam line is described as slope error of them generally. The Long Trace Profiler (LPT) is used for testing surface slope error of SR optical elements in world generally. It is requisite to use In-suit LTP measuring surface thermal distortion of SR optical elements with high heat under high bright SR source. Authors design an In-suit LTP by means of co-path interferometer with pencil light beam. The instrument not only can be used for testing slope error of mirrors in Lab. also in situation test the distortion of mirror with high heat load at synchrotron light beam line. The device can be used to test various absolute surface figures of optical elements such as aspherieal  spherical and plane. It is needless standard reference surface. It is named by LTP-III. This paper describes its basic operating principle  optical system  mechanical constructions  DC serve motor control system  array detector  data acquisition system and computer system for controlling and data analysis of LTP-III. The Instrument has advantages of high accuracy  low cost  multifunction and wide application. Length of surface measured of optical element accuracy is 0.04 arcsec.   STUDY ON CLIMATIC FEATURES OF SURFACE TURBULENT HEAT EXCHANGE COEFFICIENTS AND SURFACE THERMAL SOURCES OVER THE QINGHAI-XIZANG PLATEAU 期刊论文 Acta Meteorologica Sinica, 2000 赵平; 陈隆勋 收藏  |  浏览/下载：2/0  |  提交时间：2017/12/03 Qinghai-Xizang(Tibetan)Plateau  surface turbulent heat exchange coefficient  surface thermal source  climatic feature