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Seismic velocity structure and tectonic evolution of the Continent-ocean transition in the mid-northern South China Sea 期刊论文  OAI收割
TECTONOPHYSICS, 2023, 卷号: 862, 页码: 1
作者:  
Yuan, Y;  He, EY;  Zhao, MH;  Zhang, CM;  Gao, JW
  |  收藏  |  浏览/下载:36/0  |  提交时间:2024/02/19
Deep seismic structure of the continent-ocean transition in the northern margin of the South China Sea revealed by jointly reflective and refractive data along OBS2018-H2 profile 期刊论文  OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2022, 卷号: 65, 期号: 6, 页码: 2210-2225
作者:  
Zhao MingHui;  Yuan Ye;  Zhang CuiMei;  Gao JinWei;  Su XiaoKang
  |  收藏  |  浏览/下载:25/0  |  提交时间:2022/07/25
Crustal structure of shear waves and its tectonic significance in the mid-northern continental margin of the South China Sea 期刊论文  OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2011, 卷号: 54, 期号: 12, 页码: 3150-3160
作者:  
Wei Xiao-Dong;  Zhao Ming-Hui;  Ruan Ai-Guo;  Qiu Xue-Lin;  Hao Tian-Yao
  |  收藏  |  浏览/下载:26/0  |  提交时间:2018/09/26
Crustal structure of shear waves and its tectonic significance in the mid-northern continental margin of the South China Sea 期刊论文  OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2011, 卷号: 54, 期号: 12, 页码: 3150-3160
作者:  
Wei Xiao-Dong;  Zhao Ming-Hui;  Ruan Ai-Guo;  Qiu Xue-Lin;  Hao Tian-Yao
  |  收藏  |  浏览/下载:24/0  |  提交时间:2018/09/26
Research on model reference sliding mode control in roll stabilization of aerocraft (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
Chu H.-R.
收藏  |  浏览/下载:44/0  |  提交时间:2013/03/25
Aimed at aerospace roll stabilization  control arithmetic based on model reference sliding mode variable structure theory and chattering reduction arithmetic are formulated. Correctness and validity of arithmetic are analyzed. With flight dynamics  the roll-loop mathematic model and reference model are established. Sliding hyperplane is deduced based on model reference sliding mode variable structure theory. Combing with reaching law  control law is derived  and stability of roll-loop is analyzed. Chattering of aileron instructions is alleviate by using boundary layer approach. Digital flying simulation result shows that variable structure control arithmetic realized roll stabilization control  the roll angle is less than 5.3 under powered flight  and that of unpowered flight is less than 0.5  respectively. The command fin angle is less than 1.5. High frequency chattering of fin command nearby the minimum velocity was trailed off by chattering reduction arithmetic. The sliding mode control arithmetic show good performance when aerodynamic coefficients varies 20%. The control arithmetic is easy to be implemented for its simplicity. 2011 IEEE.  
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:27/0  |  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  
Intrusion and its implication for subsidence: A case from the Baiyun Sag, on the northern margin of the South China Sea 期刊论文  OAI收割
TECTONOPHYSICS, 2005, 卷号: 407, 期号: 40545, 页码: 117-134
Shi, XB; Burov, E; Leroy, S; Qiu, XL; Xia, B
收藏  |  浏览/下载:19/0  |  提交时间:2011/07/03
A crustal structure profile across the northern continental margin of the South China Sea 期刊论文  OAI收割
TECTONOPHYSICS, 2001, 卷号: 338, 期号: 1, 页码: 40564
Yan, P; Zhou, D; Liu, ZS
收藏  |  浏览/下载:51/0  |  提交时间:2011/07/03