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章编号:1672-7207(2014)01-0071-06 Comparative investigation of spherical lensed fiber and cylindrical lensed fiber for coupling to laser diode LU Shengqiang, ZHENG Yu, DENG Guiling, DUAN Jian (State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China) Abstract: The technology of the spherical lensed fiber and the cylindrical lensed fiber......
Preparation of Spherical Microfine Silicon PowderSHENG Yong, ZOU Jun, LI Bing, TU Mingjing (College of Material Science and Engineering, Sichuan University, Chengdu 610065, China)摘 要:Under certain conditions of proper temperature and pH value, sodium silicate was hydrolyzed in liquid ammonia chloride, and spherical microfine SiO2 powder in micrometer......
of spherical gas bottle is ensured effectively. Key words: spherical gas bottle; TC4 alloy; extruded pipe; superplasticity TC4合金由于具有比强度高,耐高温,耐腐蚀,低温性能好,综合机械性能优异而被国内外学者不断开发研究,并广泛应用于航空航天结构件及相关零部件中.其中为某工程研制的... Schematic plot of spherical gas-bottle by superplastic formation 图8 超塑性气瓶不同位置的微观组织 Fig.8 Microstructures of superplastic cylinder at different positions: (a) Equator position; (b......
固态扩散连接空洞闭合模型的研究进展 陈梦薇1,李淼泉1 (1.西北工业大学材料科学与工程学院,西安,710072) 摘要:扩散连接是一种在固态下将2个同种或异种的材料连接在一起的先进连接方法.这种方法既可以连接低碳钢,也可以连接陶瓷,甚至还可以连接传统焊接方法所不能连接的材料.在很多材料没有实验数据的条件下,预测扩散连接所需时间是非常重要也是非常困难的,因此利用空洞闭合模型对扩散连接过程进行研究是当前固态扩散连接研究的重要方面.介绍了扩散连接空洞闭合的几个典型模型,对几何模型的选择进行了阐述,并对扩散连接的机制进行了解释和说明,同时比较了这几个模型的优缺点,并预测了扩散连接空洞闭合模型的发展方向. 关键词:扩散连接; 空洞闭合; 模型; 连接机制; diffusion bonding; void shrinkage; model; bonding mechanism; [全文......
; 文章编号:1672-7207(2015)08-2850-07 Lateral carrying characteristics of new externally pressurized spherical air bearings WANG Fusheng1, BAO Gang2, ZHANG Lin1 (1. School of Mechatronics Engineering... pressurized spherical air bearing is affected by the axial force and lateral force at the same time. It is necessary to study the lateral carrying characteristics of bearings. A CFD-based analysis was performed......
a large thick plate with a spherical shape for the manufacture of a large spherical LNG tank. Cell-typed upper and lower dies made of a framework of steel plates fitted to make a grid pattern are used... agrees well with that of the designed experiment within a maximum relative error of 0.03% at the corner of the plate. Key words: cell-typed die; hot plate forming; spherical LNG tank; heat transfer......
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with spherical cavity, ECAE-SC).采用DEFORM-3D有限元软件对工业纯铝室温ECAE-SC变形过程进行模拟,深入研究了材料内部金属流动,挤压载荷,等效应变以及平均应力的分布及变化规律.在此基础上,开展了单道次ECAE-SC工艺实验研究,对变形组织进行EBSD分析和显微硬度测试,旨在为超细晶材料制备技术的开发与应用提供一种新思路. 1 ECAE-SC工艺变... with spherical cavity WANG Xiao-xi1, ZHANG Xiang2, 3, ZHANG Lei1, JIN Xu-chen1, HAN Hao-yuan1 (1. School of Mechanical and Electrical Engineering, Xuzhou University of Technology, Xuzhou 221018, China; 2......
interpolation has the advantage of natural (specifically smooth) orientation interpolation without Gimbal Lock. This work presents the application of quaternion interpolation, specifically Spherical... in terms of smooth joint motion and torque when compared to a conventional (linear) Euler interpolation.Key words:quaternion; spherical linear interpolation (SLERP); euler angle; linear euler interpolation......
)09-3317-08 Direction finding error of spatial baseline algorithm based on spherical array SI Weijian, ZHAO Pinjiao, LIU Lutao (College of Information and Communication Engineering, Harbin Engineering... baseline algorithm, a novel algorithm based on spherical array was proposed. Firstly, the phase difference expressions of incident signal impinging on the different antennas were deduced on the basis......