测量角速度和角加速度的新型敏感器件

本文叙述了利用压电材料的正、逆压电效应,研制成功的敏感器件的工作原理、结构和性能。并介绍了用敏感器件装调的部分压电角速度陀螺和压电角加速度陀螺的性能及应用。     

托卡马克中撕裂模的抑制

本文分析与计算了共振螺旋场对自发撕裂模的抑制作用。通过解电阻MHD方程证实了螺旋场能使m=2的撕裂模增长速度减慢一倍左右。同时也讨论和计算了边界控制场对撕裂模的抑制作用。 关键词：     

依靠读者再创新绩

经过一年的艰苦创业,本刊已打开局面,站稳脚跟。上月在“梅地亚中心”举办了一次成功的周年联谊会。得到了与会各界朋友的热情鼓励,IDG董事长麦戈文先生、中信所所长刘昭东分别致词,中国电子学会通信学分会秘书长来国柱教授作了关于“中国通讯市场与产业状况”的精     

X63集成脉冲宽度调制器

本文介绍的X63集成脉冲宽度调制器,是我所于81年4月定型的研制产品。它主要是作为脉冲宽度调制开关稳压器的控制电路,为单端型、双端型的开关稳压电源提供可控的开关信号。 开关稳压器是一种新型的稳压电源。较之串联稳压器,它具有效率高,可实现高压输入低压稳压输出,低压输入高压稳压输出以及一组电源输入多组多极性电源输出等功能,可以大大提高电子设备的安装密度和可靠性,降低成本,实现电子设备的小型化,轻量化。特别是对各类携带电源的电子设备,需要变换多种电源时,优越性更为突出。     

关于任意体上全方阵集合的两个定理

在下面的讨论中,K 表示任意体,M_n(K)表示由系数属于 K 的全部 n 阶方阵所组成的集合(n≥2).E 和 O 分别表示 n 阶单位方阵和零方阵;E_(ij)(1≤i,j≤n)表示除第 i 行第 j 列位置上的系数为1外,其余一切系数均为0的那个 n 阶方阵.     

IP智能与WDM技术的融合

讨论了在IP over WDM directly分层结构下,IP层网络与光层网络的三种基本融合方式—静态重叠模型、动态重叠模型和动态对等模型,这三种融合方式体现了IP over WDM directly的演变过程。同时还对各种融合方式中网络的组成结构及相应的控制平面技术作了详尽的阐述。     

氧化钨pH电化学传感器的H+响应行为研究

采用WO3作为H＋响应敏感材料，制备了WO3pH电化学传感器，对传感器的H^＋响应行为，如响应范围、响应灵敏度、响应时间等影响因素进行了分析。制备WO3工作电极的热处理温度对传感器的H^＋响应灵敏度与速度有影响，H＋响应速度与溶液pH和温度有关，溶液中Na^＋，K^＋，F^-对H＋响应行为没有影响，但是受到I^-，NO3^-的干扰。     

基于RSVP-TE的组播信令协议在ASON中的实现

讨论了自动交换光网络中实现组播的意义,介绍了GMPLS框架下基于RSVP-TE信令协议做出的组播扩展.在实验网络环境里完成了组播信令协议的实现并成功进行了组播树的建立、嫁接、剪枝和删除等操作.     

Effect of Temperature on the Void Growth in Pure Aluminium at High Strain-Rate Loading

With the environment temperature varying from 273 K to 773 K, the dynamic process of void growth in pure aluminium at high strain-rate loading is calculated based on the dynamic growth equation of a void with internal pressure. The result shows that the effect of temperature on the growth of void should be emphasized. Because the initial pressure of void with gas will increase and the viscosity of materials will decrease with the rising of temperature, the growth of void is accelerated. Furthermore, material inertia restrains the growth of void evidently when the diameter exceeds 10 μm. The effect of surface tension is very weak in the whole process of void growth.     

Measurement and Analysis of Spall Characteristics of High-Pure Aluminium at One-Dimensional Strain Loading

With an impact velocity varying from 196.9m/s to 317.9m/s and ratios of flyer/sample thickness of 2：4 and 3：6, the free-surface velocity profiles of the shock compressed high purity aluminium （HPA 99.999%） samples are measured with a velocity interferometer system for any reflector. Based on the vibrating features of the velocity profiles, the damage behaviour of HPA is analysed. The results indicate that the vibrating amplitude increases with increasing shock stress, and the subsequent reverberations describing the spall become more obvious. When the shock stress in the material is below a critical or smaller than the threshold level, the free-surface velocity profile replicates virtually the form of the compression pulse inside the sample. When the impact stress exceeds a critical value （1.4 GPa）, the micro damage would appear, and the free-surface velocity profile changes significantly, showing a series of short-duration reverberations in the profile. When the impact stress exceeds the threshold of damage, a compressive disturbance called the ＂spall pulse＂ appears in the free-surface velocity profile, and the subsequent reverberation becomes regular again. The measured spall strength of HPA is much higher than those of commercially pure aluminium reported in many references. In addition, the strength of HPA is similar to that of single-crystal aluminium.