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路易士酸协助的C-H活化／烯烃偶联反应 会议论文
甘肃省化学会第二十四届年会
作者:  史雷;  涂永强;  王民;  张辅民;  樊春安
收藏  |  浏览/下载：4/0  |  提交时间：2015/06/25
负载铂颗粒聚苯胺碳纳米管复合膜对于甲醛的电催化氧化(英文) 会议论文
第十三次全国电化学会议
作者:  王喆;  施锦;  力虎林
收藏  |  浏览/下载：1/0  |  提交时间：2015/06/25
壳聚糖与聚甲基丙烯酸之间复合行为的研究 会议论文
2005年全国高分子
作者:  柳明珠;  陈世兰
收藏  |  浏览/下载：2/0  |  提交时间：2015/06/25
LaFeO_3纳米材料电四极超精细相互作用TDPAC测量(2005) 会议论文
第九届全国正电子谱学会议
作者:  杜恩鹏;  郑永男;  周冬梅;  左翼;  袁大庆
收藏  |  浏览/下载：3/0  |  提交时间：2015/06/25
Study on LD-pumped Nd : YAG laser cutter - art. no. 60282F 会议论文
2005
Cui J. F.; Zhao J.; Fan Z. W.; Zhao C. H.; Bi Y.; Zhang J.; Niu G.; Shi Z. H.; Pei B.; Zhang G. X.; Xue Y.; Qi Y.
收藏  |  浏览/下载：4/0  |  提交时间：2013/03/28
Research on LD-pumped dual wavelength Nd : YAG laser with high beam quality for machining - art. no. 60282G 会议论文
2005
Cui J. F.; Fan Z. W.; Zhao C. H.; Zhang J.; Niu G.; Shi Z. H.; Pei B.; Zhang G. X.; Xue Y.
收藏  |  浏览/下载：6/0  |  提交时间：2013/03/28
Study on LD-pumped Nd:YAG laser cutter (EI CONFERENCE) 会议论文
ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China
Cui J.; Zhao J.; Fan Z.; Zhao C.; Bi Y.; Zhang J.; Niu G.; Shi Z.; Pei B.; Zhang G.; Xue Y.; Qi Y.
收藏  |  浏览/下载：14/0  |  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  
Research on LD-Pumped dual wavelength Nd:YAG Laser with high beam quality for machining (EI CONFERENCE) 会议论文
ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China
Cui J.; Fan Z.; Zhao C.; Zhang J.; Niu G.; Shi Z.; Pei B.; Zhang G.; Xue Y.
收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25
Considering laser medium thermal lens effect and thermal focal length changes with pumping power  conventionally  lasers are designed to operate in the middle of thermal stable zones  where the fundamental mode size is insensitive to thermal perturbation  while this method seems impossible when large fundamental mode size is required. Through self-select mode cavity  lasers are designed to work at the border of stable zone instead  where large fundamental mode size in gain media can be reached. With increase of pumping power and self-aperture mode-selective effect  mode size would grow up automatically to a certain value suitable for monomode resonance. With double 180 W pump modules  acoustic Q-switch and LBO external frequency-doubled  over 28 W which M2 equals 4.5 quasi-CW output green laser and 52W 1.064 um IR output is obtained simultaneity. With the insertion or not of the harmonic separator by footswitch  high beam quality green  IR  and green IR lasers are obtained conveniently.  
Reverse transition of a turbulent boundary layer 会议论文
Yan, DC; Zhang, Z; Shi, HM; Sun, ZL
收藏  |  浏览/下载：1/0  |  提交时间：2015/11/13
an algebraic framework for schema matching 会议论文
6th International Conference on Web -Age Informational Management, Hangzhou, PEOPLES R CHINA, OCT 11-13,
Zhang Z; Che HY; Shi PF; Sun Y; Gu J
收藏  |  浏览/下载：5/0  |  提交时间：2011/07/28

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