CORC

在结果中检索

CORC

浏览/检索结果: 共32条，第1-10条 帮助

限定条件    
已选(0)清除 条数/页：   排序方式：
Chemical composition of dust storms in Beijing and implications for the mixing of mineral aerosol with pollution aerosol on the pathway 期刊论文
Journal of Geophysical Research-Atmospheres, 2005, 卷号: 110, 期号: D24209, 页码: doi:10.1029/2005JD006054
Y. L. Sun; G. S. Zhuang; Y. Wang; X. J. Zhao; J. Li; Z. F. Wang; Z. S. An
收藏  |  浏览/下载：10/0  |  提交时间：2010/04/21
Analysis of 40 years of solar radiation data from China, 1961-2000 期刊论文
Geophysical Research Letters, 2005, 卷号: 32, 期号: L06803, 页码: doi:10.1029/2004GL022322
H. Z. Che; G. Y. Shi; X. Y. Zhang; R. Arimoto; J. Q. Zhao; L. Xu; B. Wang; Z. H. Chen
收藏  |  浏览/下载：20/0  |  提交时间：2010/04/21
Modified spontaneous emission of europium complex nanoclusters embedded in colloidal silica spheres 期刊论文
Chemical Physics Letters, 2005, 卷号: 403, 期号: 1—3, 页码: 129-134
Zhao D.; Qin W. P.; Zhang J. S.; Wu C. F.; Qin G. S.; De G. J. H.; Lu S. Z.
收藏  |  浏览/下载：7/0  |  提交时间：2012/10/21
Bright-green upconversion emission of hexagonal LaF3 : Yb3+,Er3+ nanocrystals 期刊论文
Chemistry Letters, 2005, 卷号: 34, 期号: 7, 页码: 914-915
De G. J. H.; Qin W. P.; Zhang J. S.; Zhao D.
收藏  |  浏览/下载：21/0  |  提交时间：2012/10/21
Improved thermal stability of europium complex nanoclusters embedded in silica colloidal spheres 期刊论文
Chemistry Letters, 2005, 卷号: 34, 期号: 3, 页码: 366-367
Zhao D.; Qin W. P.; Zhang J. S.; De G. H.
收藏  |  浏览/下载：7/0  |  提交时间：2013/03/27
High energy long duration frequency-doubled Nd:YAG laser and application to veins occlusion (EI CONFERENCE) 会议论文
High-Power Lasers and Applications III, November 8, 2004 - November 11, 2004, Beijing, China
Zhang L.; Yang G.; Li D.; Lu Q.; Gu H.; Zhu L.; Zhao Z.; Li X.; Tang Y.; Guo J.
收藏  |  浏览/下载：20/0  |  提交时间：2013/03/25
Laser treatment represents an attractive option to other methods of vessel diseases especially varicose veins. A long pulse (30-50ms) 532nm laser (Fig.1) is used in our experiments with the pulse duration matching the thermal relaxation time of the vessels and the green laser matching the absorption spectrum peak of the blood. Laser irradiates nude vein vessels directly or exterior skin to finish operation faster and to acquire the practical data for upper enteron varicose vein treatment in several animal experiments performed in vivo. The 5J-energy pulse allows us to finely occlude rabbit or dog's vein vessels up to 2 mm in diameter when irradiating them off external skin (Fig.2). Blood vessels are occluded at once and later biopsy specimens show the immediate and long-term lasting occlusion effect. While irradiating vessels directly (Fig.3)  the vessels are usually irradiated to perforate  detailed causes are still under investigation. Animal experiments show long pulse green laser therapy is a safe and effective solution to the vein's occlusion  which promises such laser with high energy of each pulse and 30-50 ms duration is an ideal candidate for vessel diseases treatment.  
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
Buffer layer effect on ZnO nanorods growth alignment 期刊论文
Chemical Physics Letters, 2005, 卷号: 408, 期号: 4—6, 页码: 335-338
Zhao D. X.; Andreazza C.; Andreazza P.; Ma J. G.; Liu Y. C.; Shen D. Z.
收藏  |  浏览/下载：4/0  |  提交时间：2012/10/21
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  

©版权所有 ©2017 CSpace - Powered by CSpace