共搜索到17135条信息,每页显示10条信息,共1714页。用时:0小时0分0秒833毫秒
resistivity at next moment, and then got the all-time apparent resistivity of all moments. As the formulation of electromagnetic field stimulated by the rectangular loop is complicated, it is hard to utilize... resistivity of the measuring points in the rectangular loop. Based on the formulation of EMF excited by rectangular loop in any point of the earth surface, it is able to obtain all-time apparent......
; 文献标志码:A 文章编号:1672-7207(2012)03-1171-08 Optimization of rectangular pin fin heat sinks during air jet impingement TU Fu-bing... was done in the process of optimization of rectangular pin fin heat sink. The thermal resistance of a series of rectangular pin fin heat sinks with different fin height and width was experimented......
number in rectangular channels DONG Zhenying, ZHOU Benzhao, SUN Zhiqiang, JIANG Yun, ZHOU Tian (School of Energy Science and Engineering, Central South University, Changsha 410083, China) Abstract... of circular cylinder wakes at Reynolds number 100 in rectangular channels were computed and analyzed. The influence of blockage and aspect ratios on the pressure distribution of the cylinder surface......
用内膛表面温度评估缓蚀添加剂的作用效果 梁西瑶1,曹连忠1,葛朝晖1,余永刚2,袁威1 (1.中国兵器科学研究院,宁波分院,山东,烟台,264003;2.南京理工大学,江苏,南京,290014) 摘要:提出一种利用火炮内膛表面温度评估缓蚀添加剂作用效果的研究方法.首先设计专用测温传感器,测量距身管内膛表面一定厚度处的温度变化,再通过身管内膛传热规律外推得到内表面温度.利用本方法,在14.5 mm弹道枪上进行了一种新型缓蚀添加剂材料的筛选和配方试验研究,采用膛壁峰值温度评估缓蚀添加剂的作用效果.最终确定的新型缓蚀添加剂被用于采用高能,高爆温硝胺发射药的105mm穿甲弹中,降烧蚀效果良好. 关键词:火炮身管; 烧蚀; 膛壁温度; 缓蚀添加剂; gun barrel; erosion; bore surface temperature; erosion-wear reducing......
of rectangular H96 tube ZHU Ying-xia, LIU Yu-li, YANG He, LI Hai-ping (State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China) Abstract: In order to control springback and section deformation of rotary-draw bending of rectangular tube, the finite element model for springback and sectional deformation......
Trans. Nonferrous Met. Soc. China 22(2012) s350-s356 Plastic deformation on hydroforming of aluminum alloy tube with rectangular sections WANG Xiao-song1, YUAN Shi-jian1, SONG Peng2, XIE Wen-cai3 1.... FAW Car Co., Ltd., Changchun 130011, China Received 28 August 2012; accepted 25 October 2012 Abstract: The plastic deformation process on hydroforming of aluminum alloy tube with rectangular sections......
. ......
一种矩形件分层排样算法 郑盈盈1,张伟1,邵晓明1,安鲁陵1 (1.南京航空航天大学机电学院,南京,210016) 摘要:针对在具有宽度一定,长度不限的板材上进行矩形件排样的问题,结合模拟退火算法,设计了一种矩形件分层优化排样算法.该算法以板材宽来分层,层数依据待排零件而定,灵活性强,并且通过算例验证了该算法的有效性和合理性. 关键词:矩形件分层排样; 一刀切; 模拟退火算法; 复合材料; Rectangular layer packing; Guillotine; Simulated annealing algorithm; Composite; [全文内容正在添加中] ......
Wind tunnel investigation on interference effect of eight grouped super large cooling towers with rectangular arrangement CHENG Xiaoxiang, ZHAO Lin, GE Yaojun (State Key Laboratory for Disaster Reduction... (the prototype column-supported hyperboloidal shell is of 183.89 m in height) in TJ-3 wind tunnel of Tongji University, interference effect of eight grouped cooling towers with a close rectangular......
时域门技术在传输/反射法介质电磁参数测量中的应用 葛鹰1,陈天立1,曾国勋2,张海燕2,贺春华1 (1.广东工业大学,广州,510006;2.广东工业大学,广州510006;3.毫米波国家重点实验室,南京210096) 摘要:在传输/反射法测量电磁参数的基础上,分析了传统的传输/反射法在电介质微波电磁参数计算中的局限性,采用时域门技术,测试了空气,聚乙烯石蜡和BaM型铁氧体等材料的电磁参数.结果显示时域门技术可显著提高材料的测量精度和稳定性. 关键词:矩形波导; 传输/反射法; 电磁参数; 时域门; Rectangular waveguide; Transmission/reflection method; Electromagnetic parameters; Time domaingating; [全文内容正在添加中] ......