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Energy-Efficient Design for a NOMA Assisted STAR-RIS Network With Deep Reinforcement Learning 期刊论文  OAI收割
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 2023, 卷号: 72, 期号: 4, 页码: 5424-5428
作者:  Guo, Yi;  Fang, Fang;  Cai, Donghong;  Ding, Zhiguo
  |  收藏  |  浏览/下载：16/0  |  提交时间：2023/07/13
The Realization of Non-reflecting Boundaries for Compressible Rayleigh-Taylor Flows with Variable Acceleration Histories 期刊论文  OAI收割
Procedia Engineering, 2015, 卷号: 126, 页码: 118-122
作者:  Zhang YS(张又升)
收藏  |  浏览/下载：22/0  |  提交时间：2016/08/25
The spectral feature analysis of semiconductor thin disk laser (EI CONFERENCE) 会议论文  OAI收割
Optoelectronic Materials and Devices II, November 2, 2007 - November 5, 2007, Wuhan, China
作者:  Li J.;  Wang L.-J.;  Wang L.-J.;  Ning Y.-Q.;  Li J.
收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25
The semiconductor thin disk laser is a new type of semiconductor laser. This work gives the basic operation function of semiconductor disk laser  and analyses the heat effect by the experimentally measured photoluminescence spectrum of the laser chip at different pump power and different temperature. We can see that: with increasing pump power  the thermal effects of the gain material becomes seriously and causes the saturation of carrier lifetime  so the electron-hole pair created in the absorbtion layer have no enough time to rate to one of the wells  and the non-radiative recombination happens in the barrier. When the thermal effects becomes stronger  the chip will not lasing. This phenomenon is from the smaller energy offset between barrier and quantum well. We optimize the original structure design and experimental technology. A non-absorbing AlGaAs layer who is transparent to the pumping and laser wavelength is added to confine the carriers in the quantum wells. At the same time a DBR with double reflecting band is induced to improve the absorbing efficiency of the pumping light. The single QW is replaced by the three narrow QWs  This three QWs structure can add the quantum state of QW  increase the recombination probability of carriers in the QWs and reduce the heat effect. The chemical etch equipment is also improved to control the surface unevenness to be within 50 nm.  
Method for computer-aided alignment of complex optical system (EI CONFERENCE) 会议论文  OAI收割
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 2, 2005 - November 5, 2005, Zian, China
作者:  Yu J.
收藏  |  浏览/下载：33/0  |  提交时间：2013/03/25
For making complex optical system meet the design requirement  such as the space camera used in remote sensing and UVX lithophotography  especially for off-axis all-reflecting optical system  alignment technology is so necessary. In this paper  a method is presented. Based on the ideas of linearity instead of non-linearity and difference quotient instead of differential quotient  a mathematical model for computer-aided alignment is proposed. This model included the characteristics of the optical system  wavefront difference of its exit pupil and its misalignment of the misaligned optical system. Then comparing self-compiled software with alignment package of CODE V  as a result  this self-compiled software is much more valid than alignment package of CODE V. For a large aperture  long focal length and off-axis three-mirror optical system  computer-aided alignment is successful. Finally  the wavefront error of the middle field is 0.094 waves RMS and the wavefront error of +0.7 field is 0.106 waves RMS and the wavefront error of -0.7 field is 0.125 waves RMS at =632.8nm are obtained.  
Finite element methods for the equations of waves in fluid-saturated porous media 期刊论文  OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2000, 卷号: 43, 期号: 2, 页码: 264-278
作者:  Shao, XM;  Lan, ZL
  |  收藏  |  浏览/下载：15/0  |  提交时间：2018/07/30