软交换技术发展现状

介绍了国际软交换技术的现状，采用软交换技术的下一代网络提供的业务，从事软交换研究的国际组织及软交换技术发展中存在的问题。     

金属基复合材料连接方法研究综述

拥有良好综合性能的金属基复合材料的应用往往受到没有成熟连接方法的限制。为解决这个问题, 本文对各种连接金属基复合材料的方法进行了系统阐述,并分析其各自的应用场合和限制条件,以便读者进行复合材料连接工艺选择时参考。     

Interfacial structure and joint strengthening in arc brazed galvanized steels with copper based filler

1 Introduction Arc brazing is a brazing method that the specimens are heated by arc[1]. It is the generic terms of GMA brazing and GTA brazing[2], and has both the characteristics of brazing and welding. Compared with traditional arc fusion welding, the s…     

Bonding of Al2O3 ceramic and Nb using transient liquid phase brazing

The brazing of Al2O3 to Nb was achieved by the method of transient liquid phase (TLP) bonding. Ti foil and Ni-5V alloy foil were used as interlayers for the bonding. The base materials were brazed at 1423-1573 K for 1-120 min. The results show that the shear strength of the joint first increases and then decreases with increasing holding time and brazing temperature. The joint interface microstructure and elements distribution were investigated. It can be concluded that a composite structure, in which the base metals are solid solution Nb(V) and Nb(Ti) reinforced by Ni3Ti, is formed when the brazing temperature is 1473 K and holding time 15 min, and a satisfactory joint strength can be achieved. The interaction of Ti foil and Ni-5V foil leads to the formation of liquid eutectic phase with low melting point, at the same time the combination of Ti come from the interlayer with O atoms from Al2O3 results in the bonding of Al2O3 and Nb.     

BS-PT基高温压电超声换能器研究

针对高温超声检测技术的应用需求,该文研究了基于钪酸铋-钛酸铅(BS-PT)基高温压电陶瓷材料的高温超声换能器。利用PiezoCAD器件仿真软件设计并制作了一款1 MHz的高温压电超声换能器,且在200 ℃下对该器件的电学和声学性能进行了测试和分析。结果表明,随着测试温度的升高,换能器的脉冲回波幅值虽略有降低,但其中心频率、带宽变化不明显,带宽仍保持在20%左右。该文设计并制备的BS-PT基高温压电超声换能器可以在200 ℃环境中正常稳定工作。     

基于深度图像技术的手势识别方法

针对复杂环境下的手势识别问题,提出一种基于深度图像技术的手势识别方法。利用深度图像信息从复杂环境中提取手势区域,综合手势的表观特征,建立决策树实现手势的识别。对常见的9种手势在复杂背景条件下进行测试,实验结果表明,手势的平均识别率可达到98.4%,速度达到每秒25帧。     

仿人手臂动力学控制实验平台的设计与实现

研制了一种新型的可编程运动控制器.在实现多轴协调运动控制的同时,该控制器还具有控制结构可重定义及支持仿真软件MATLAB的特点.在此基础上,设计了仿人手臂动力学控制实验平台,并通过实验验证了其实现高级控制算法的能力.􀁱     

HHRB100搬运机器人码垛程序的离线编程

首先介绍了四自由度搬运机器人的结构特点，然后针对普通示教再现作业方式，提出了码垛机器人离线编程方法。重点对搬运机器人离线码垛过程进行了研究，通过码垛关键参数的输入和码垛空间判断，建立离线编程的基础，给出了机器人码垛的路径规划，最后进行了计算机图形仿真。验证了码垛机器人离线编程方法。