中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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Dynamic charge state distributions of 5 MeV Xe20+ ions penetrating through gaseous argon target 期刊论文  OAI收割
Physica Scripta, 2020, 卷号: 95, 期号: 10, 页码: 7
作者:  
Wang,Z;  Cheng,R;  Xue,F B;  Chen,Y H;  Lei,Y
  |  收藏  |  浏览/下载:69/0  |  提交时间:2021/12/09
Overland-Flow Resistance Characteristics of Nonsubmerged Vegetation 期刊论文  OAI收割
JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING, 2017, 卷号: 143, 期号: 8
作者:  
Cui, Ningbo;  Zhang, Kuandi;  Wang, Zhigang;  Wang, Guangqian;  Sun, Xiaomin
  |  收藏  |  浏览/下载:35/0  |  提交时间:2018/04/12
Plasma-arc technology for the thermal treatment of chemical wastes 会议论文  OAI收割
26th Annual International Conference on Incineration and Thermal Treatment Technologies, IT3, Phoenix, AZ, United states, May 14, 2007 - May 18, 2007
作者:  
Sheng HZ(盛宏至);  Huang ZQ;  Li YJ(李要建);  Xu YX(徐永香)
收藏  |  浏览/下载:29/0  |  提交时间:2017/06/01
Study on LD-pumped Nd:YAG laser cutter (EI CONFERENCE) 会议论文  OAI收割
ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
Zhang G.;  Zhang G.;  Zhang G.;  Zhang J.;  Zhang J.
收藏  |  浏览/下载:29/0  |  提交时间:2013/03/25
The theory of laser cutter and the technology neck is analyzed. We can conclude that it is almost impossible to deal with the waste thick silicon wafers which are yielded in producing silicon wafers by conventional eroding or diamond cutting  when the cutting velocity equals 100mm/min  while it is also unperfected with ecumenical laser cutter without good beam quality or precise laseroptics system. It is represented that high average power and high repetition rate laser with good beam quality and precise laseroptics system are pivotal to obtain excellent cutting effect such as thick groove depth  double-layer 0.75mm thick silicon wafer can be penetrated.. The cross section is fine and the groove is narrow  rapid cutting speed  the cutting quality meets the expecting demand.  fine kerf section without considering the effect of technique. Considering laser medium thermal lens effect and thermal focal length changing with pumping power  using plano-convex high reflectivity mirror as the back cavity mirror to compensate the heat lens influence  a /4 waveplate to compensate heat -induced birefraction  utilize the Nd:YAG self- aperture effect  more than 50 W average power 1.064 um IR output is obtained with beam quality factor (M2) equals 3.19. Through the LD-Pumped Nd:YAG laser cutter we developed with short focus length negative spherical aberration focusing lens  double axis linear step motor positioning system  suitable beam expander multiplying factor  appropriate diameter of exit beam aperture  proper repetition rate  when the cutting velocity equals 400mm/min  0.75mm thick silicon wafer can be penetrated  
an orientation update message filtering algorithm in collaborative virtual environments 期刊论文  OAI收割
JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY, 2004, 卷号: 19, 期号: 3, 页码: 423-429
Zhang MJ; Georganas ND
  |  收藏  |  浏览/下载:21/0  |  提交时间:2011/07/29