作者: 魏学业 (北京理工大学)
出处: 光学技术 1994 第6期 P29-32
关键词: 探测器;条件数;模式系数传感器;优化设计;ZERNIKE
摘要: 优化设计的目的是用最少的通道数(探测器的像元数)探测最高阶的波前畸变。由此使探测器的探测精度高,系统简单,在极弱光探测条件下可探测光强低。由响应矩阵元的定义式可知,影响Zernike模式系数传感器可探测和重构波前Zernike多项式项数的主要因素是探测器的形状,即探测器的内部像元数和边缘像元数及它们 ...
作者: Wang, Naixing1;Chen, Boren1;Ou, Yuxiang1; (1College of Chemical Engineering and Materials Science, Beijing Institute of Technology, Beijing 100081, China)
出处: Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology 1994 Vol.14 No.1 P33-36
摘要: In order to explore new energetic materials having a thermal stability comparable to that of PYX yet with a higher crystal density than PYX as synthes ...
作者: Le, Xiuwei1;Wei, Jihua2;Wang, Daoyin1;Ding, Yuwen2; (1Department of Machanical Engineering, Beijing Institute of Technology, Beijing 100081, China;2State Jiangbin Machine Factory, Hunan Xiangtan 411102, China)
出处: Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology 1994 Vol.14 No.2 P126-131
摘要: Squeeze casting has been used for the shaping of comparatively large sized pistons made of hypereutectic aluminum-silicon alloys (silicon content betw ...
作者: Huang, Fenglei1;Ding, Jing1;Huan, Shi2; (1Mechanics and Engineering Department, Beijing Institute of Technology, Beijing 100081, China;2Research Department, National University of Defence Technology, Changsha 410073, China)
出处: Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology 1994 Vol.14 No.4 P443-448
摘要: The influence of pressure gauges to the reaction flow field is studied experimentally. Pressure histories during the shock initiation process for a mo ...
作者: Sun, Jianguang1;Yu, Yongzhong1; (1College of Chemical Engineering and Materials Science, Beijing Institute of Technology, Beijing 100081, China)
出处: Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology 1994 Vol.14 No.3 P245-250
摘要: The oxidation of pentacyclo [5. 4. 0. 02,6. 03,10. 05,9] undecane-8, 11-dioxime 2 and pentacyclo [6. 3. 0. 0 2,6 03,1005,9] undecane -4, 7-dioxime 8 i ...
作者: Weidong, Yang1;Yongyuan, Yang1;Junshen, Wang1;Cunlin, Zhang2;Meiwen, Yu2; (1Institute of Photographic Chemistry, Academia Sinica, Beijing, China;2Optical Engineering Department, Beijing Institute of Technology, Beijing, China)
出处: Journal of Photopolymer Science and Technology 1994 Vol.7 No.1 P187-192
摘要: The visible sensitive photoinitiating system composed of 2, 5-bis(4'-diethylaminobenzylidene) cyclopentanone(DEAP) and 2-chlorohexaarylbiimidazole (o- ...
作者: Zhou, Wei1;Fu, Ruonong1;Dai, Rongji1;Huang, Zaifu2;Chen, Yanfei2; (1Department of Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, China;2Department of Environmental Science, Wuhan University, Wuhan, China)
出处: Journal of High Resolution Chromatography 1994 Vol.17 No.10 P719-722
摘要: A new kind of side chain liquid crystalline polysiloxane containing a crown ether with a longer spacer (PSC‐11) has been prepared and coated on a fuse ...
作者: 张志伟,李荣志,朱鹤孙 (北京理工大学)
出处: 材料研究学报 1994 第4期 P330-336
关键词: 金刚石薄膜;声学、钛;高音扬声器;振动膜
摘要: 综述了扬声器高音振膜材料的研究工作及其进展,特别介绍了金刚石薄膜(DF)制备扬声器振动膜和用类金刚石薄膜(DLC)涂层制备扬声器振动膜方面的进展.探讨了用DF及其钛复合材料制备扬声器振动膜的技术方法并采用直流电弧等离子体喷射法制备了多晶金刚石涂覆的球顶形钛扬声器高频振膜,测试证明声学效果优于涂覆前.
作者: 辛建国,魏光辉 (北京理工大学工程光学系)
出处: 激光与红外 1994 第1期 P18-18
关键词: 射频激励;阵列波导;CO_2激光器
摘要: 本文介绍了目前国内外研究者们提出的各种射频激励相干阵列波导CO2激光器技术,讨论了射频激励相干阵列波导CO2激光器技术的一个研究方向。
作者: 张莉,李世智 (北京理工大学电子工程系)
出处: 电子学报 1994 第9期 P100-103
关键词: 散射;共形阵;自适应阵
摘要: 本文应用几何绕射理论对载体散射波进行了分析,考察了在散射波影响下Applebum自适应共形阵干扰和调节S/N的能力,结果表明,在绝大多数情况下,无线阵具有较好的性能,但是,当天线阵主瓣受载体散射的影响较大时,无线阵调节S/N的能力要受到限制,自适应天线的性能变坏.
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