消息
×
loading..
中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
机构
采集方式
内容类型
发表日期
学科主题
筛选

浏览/检索结果: 共8条,第1-8条 帮助

条数/页: 排序方式:
Cooling effects study on ventilated embankments under the influence of the temperature differences between the sunny slopes and the shady slopes 期刊论文  iSwitch采集
COLD REGIONS SCIENCE AND TECHNOLOGY, 2011, 卷号: 65, 期号: 2, 页码: 226-233
作者:  
Kun, Zhang;  Li, Dongqing;  Niu Fujun;  Mu Yanhu
收藏  |  浏览/下载:31/0  |  提交时间:2019/10/08
Distribution characteristics and influence factors of present geo-temperature field in su-lin mine area, huaibei coalfield 期刊论文  iSwitch采集
Chinese journal of geophysics-chinese edition, 2009, 卷号: 52, 期号: 3, 页码: 732-739
作者:  
Tan Jing-Qiang;  Ju Yi-Wen;  Hou Quan-Lin;  Zhang Wen-Yong;  Tan Yong-Jie
收藏  |  浏览/下载:51/0  |  提交时间:2019/05/10
Dome design and coupled thermal-mechanical analysis of supersonic missile (EI CONFERENCE) 会议论文  OAI收割
2009 International Conference on Optical Instruments and Technology, OIT 2009, October 19, 2009 - October 22, 2009, Shanghai, China
Xing-qiao A.; Qun W.; Hong-guang J.
收藏  |  浏览/下载:64/0  |  提交时间:2013/03/25
A review of high-speed flow pressure and aerodynamic heating effect on Supersonic missile's dome is given. The dome should have excellent properties in optical  mechanical and chemical characteristics. A design of dome on supersonic mode is described according to tactical guide line of a missile. The dome made of quartz which is about 8mm thick and 141mm in window diameter. To check up the reliability of the dome  a reasonable finite element model (FEM) of dome is established  and a thermal-mechanical Analysis to the dome by finite element software NASTRAN has carried on  through these can obtained the distribution of temperature field and stress field when the speed is 2.3Ma. The results indicated that the stress was concentrated in the joint of the dome end and the Missile Section  and the maximum stress was 16.4Mpa. The stress of other nodes was smaller than the allowable stress of quartz glass. Reference to the results of the analysis  a lightweight revision to the dome structural dimension and a new method of dome fixing have put forward  which can reduce the stress concentration. 2009 SPIE.  
A method of outdoor simulation of infrared radiance of targets (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, June 17, 2009 - June 19, 2009, Beijing, China
Song J.-T.; Shen X.-H.; Zhao Y.-J.
收藏  |  浏览/下载:37/0  |  提交时间:2013/03/25
Current research on infrared simulation often focuses mainly on infrared imaging simulation by computer and pays little attention to outdoor simulation of infrared radiation characteristics of targets. In order to simulate infrared radiance of targets outdoors  in this paper we propose a new outdoor simulation method on the basis of heating the cloth by electricity. There are two major contributions in the paper. Firstly  uneven distributing of temperature field of the cloth surface is considered and the long-wave thermal imager is used as a link of the temperature control system. On the basis of many experiments  the expression is concluded about the relation of the temperature obtained by the lone-wave thermal imager and the temperature obtained by the temperature control system and the environmental temperature at the experimental scene. Secondly  the influence of the environment at the experimental scene on the infrared radiance of the cloth surface is thought over. Thanks to two measures above  simulation precision of infrared radiance is made much better. The results of many outdoor experiments demonstrate the performance of the proposed approach. 2009 SPIE.  
Photoconducting response on bending of individual ZnO nanowires 期刊论文  OAI收割
JOURNAL OF MATERIALS CHEMISTRY, 2009, 卷号: 19, 期号: 7, 页码: 1002
Gao, P; Wang, ZZ; Liu, KH; Xu, Z; Wang, WL; Bai, XD; Wang, EG
收藏  |  浏览/下载:31/0  |  提交时间:2013/09/24
High-power InGaAs/GaAs VCSEL's two-dimension arrays (EI CONFERENCE) 会议论文  OAI收割
ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
Liu Y.;  Wang L.-J.;  Wang L.-J.;  Liu Y.;  Liu Y.
收藏  |  浏览/下载:28/0  |  提交时间:2013/03/25
Selectively oxidized InGaAs/GaAs vertical -cavity surface-emitting lasers (VCSEL) array at an emission wavelength of 980nm was reported. A 16 elements array with 200m aperture size (250m center spacing) of individual elements shows a CW output power of 1.21 W at room temperature  resulting in 1 KW/cm2 average optical power density. The device threshold current is 1.32A The lasing peak wavelength is 981.9 nm  the full width at half-maximum is 0.7 nm  and the far-field divergence angle is about 17.The characteristics of a single device with a active region diameter of 800m is compared with that of a 2-D array with active region diameter of individual clement of 200m. These two kinds of devices have the same total lasing area. At the same current injection  the single device has a higher threshold and a higher output power than the array. The red shift of single device is more obvious than that of the array's.  
High-power VCSELs single devices aid 2-D arrays (EI CONFERENCE) 会议论文  OAI收割
ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
Liu Y.;  Wang L.;  Wang L.;  Wang L.;  Liu Y.
收藏  |  浏览/下载:17/0  |  提交时间:2013/03/25
INTERVALLEY GAMMA-X DEFORMATION POTENTIALS FOR TOP VALENCE BANDS IN III-V ZINCBLENDE SEMICONDUCTORS BY ABINITIO PSEUDOPOTENTIAL CALCULATIONS 期刊论文  OAI收割
JOURNAL OF PHYSICS-CONDENSED MATTER, 1993, 卷号: 5, 期号: 6, 页码: 647
WANG, JQ; GU, BY
收藏  |  浏览/下载:24/0  |  提交时间:2013/09/18
  • 首页
  • 上一页
  • 1
  • 下一页
  • 末页