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Hydrogenolysis of biomass-derived sorbitol to glycols and glycerol over Ni-MgO catalysts 期刊论文  OAI收割
CATALYSIS COMMUNICATIONS, 2013, 卷号: 39, 期号: 1, 页码: 86-89
作者:  
Chen, Xinguo;  Wang, Xicheng;  Yao, Shengxi;  Mu, Xindong
收藏  |  浏览/下载:29/0  |  提交时间:2015/11/02
Hydrogenolysis of biomass-derived sorbitol to glycols and glycerol over Ni-MgO catalysts. 期刊论文  OAI收割
Catalysis Communications, 2013, 期号: 39, 页码: 86-89
Chen, X.; Wang, X.; Yao, S.; & Mu, X.
收藏  |  浏览/下载:25/0  |  提交时间:2014/03/21
Efficient synthesis and identification of novel propane-1,3-diamino bridged CCR5 antagonists with variation on the basic center carrier 期刊论文  OAI收割
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY, 2010, 卷号: 45, 期号: 7, 页码: 2827-2840
作者:  
Fan, Xing;  Zhang, Hu-Shan;  Chen, Li;  Long, Ya-Qiu
  |  收藏  |  浏览/下载:20/0  |  提交时间:2019/01/08
Optimal design of strap-down inertial navigation support under random loads (EI CONFERENCE) 会议论文  OAI收割
2010 IEEE International Conference on Information and Automation, ICIA 2010, June 20, 2010 - June 23, 2010, Harbin, Heilongjiang, China
作者:  
Li M.
收藏  |  浏览/下载:33/0  |  提交时间:2013/03/25
In order to realize miniaturization and light weight of the strap-down inertial navigation system  and then to make sure that it works well under random loads  optimal design is applied to the strap-down inertial navigation support with the methods of topology optimization and size optimization. Firstly  based on the installation requirement of devices and connection requirement of the support and the carrier  the initial structure of the support is designed. Topology optimization with FEA software ANSYS is adopted on the initial structure to get the basic one. Then 5 critical sizes are chosen as design variables  and the support structure is optimized by means of size optimization to reach light weight with satisfying the requirement of dynamic stiffness. Finally  random vibration analysis is applied to the initial structure. In the mean time  random vibration test is carried out to qualify the analysis method. After the qualification  a random vibration analysis is applied to the optimized support structure to get the rms of displacement response and acceleration response of the support to validate whether the optimized structure is appropriate. The results indicate that the dynamic stiffness of the optimized support structure satisfies the design requirements  and its weight is lighter 49.38% than that of the initial one. This research can be a reference to the structure design of supports under random loads  and the result has been applied to the development and manufacture of a prototype aerocraft. 2010 IEEE.  
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.