利用象增强器构成光电相关鉴相器面阵的研究

本文介绍了利用阴极可控的微通道板象增强器构成面阵型光电相关鉴相器的原理,采用了方波与正弦波相关的方案,在微通道板象增强器的光电阴极加上方波门控电压,把它作为参考信号,测量具有相位差的同频正弦波光信号,研究了它的一些基本特性,给出了这种面型鉴相器的潜在应用.     

象增强器用微型高压电源

本文叙述了象增强器的应用及其电气特性,并介绍了如何制作象增强器用微型高压电源,最后给出了实际范例.     

超高真空中银表面垂直谐波电流的实验测量

在超高真空的条件下,测量了清洁、自由银表面产生的光学二次谐波随基波电矢量与入射面之间夹角(?)的变化,从而通过理论公式,求得由Rudnick和Stern引入的,用于衡量垂直面电流密度的唯象参数a的值,在入射基频光波长为1.064μm时,被测定为-4.0±0.8.     

用等效替代法培养学生创新思维

创新在物理教育中的表现,最显著的方面就是实验.物理是一门以实验为基础的科学,高中物理所讨论解决的问题,虽然多数来源于实际生活,但是学生缺少实际生活经验和感性认识,对解决一些实际物理问题感到很困难.教师利用设计的简易实验来再现物理过程和物理情景,为学生提供广阔的想象空间,给学生足够的思考余地,激发学生的兴趣和求知欲,在观察中主动探索规律,寻找解决问题的物理方法,培养创新思维能力.     

一体式中医舌象采集分析系统设计

舌象采集是中医舌象分析中非常重要的一环,一套稳定、可靠、高精度的舌象采集系统直接影响到舌象分析和病情诊断的准确性。针对上述要求,设计了一种一体式的中医舌象采集分析系统,具有结构简单,功能全面,体积小等特点。通过积分球搭建的光照环境保证了舌体的受光均匀。使用MFC编写采集处理程序,便于升级维护。研究了一种手动调节相机白平衡参数的方法,保证采集过程中舌象颜色的准确性。     

对偶空间在理论力学中的应用

非线性科学时代和不确定性科学时代同步的,是在其刺激之下的继续发展,主要表现在对混沌动力系统的机理探讨上,此时期对混沌的研究成果似乎不如20世纪六七十年代那样多,那样具有刺激性、突破性,但易看出此时期的研究的确是更深入、更广泛了,本文主要结合数学中的对偶空间分析理论力学的相关理论.     

广义正交表交互作用自由度分布的判定

正交相遇平衡区组设计(或者广义正交表)是一种类似于正交拉丁方(或者正交表)的新设计,但试验次数大幅减少.与交互作用有关的混杂现象是正交设计也是正交相遇平衡区组设计的难点,利用矩阵象技术,给出了广义正交表交互作用自由度分布的判定方法,借助于SAS软件可以方便快速的进行判定.     

A moving screw dislocation near interfacial rigid lines in two dissimilar anisotropic media

This paper attempts to investigate the problem for the interaction between a uniformly moving screw dislocation and interface rigid lines in two dissimilar.anisotropic. materials. Integrating Riemann-Schwarz＇s symmetry principle with the analysis singularity of complex functions, we present the general elastic solutions of this problem and the closed form solutions for interfaces containing one and two rigid lines. The expressions of stress intensity factors, at the rigid line tips and image force acting on moving dislocation are derived explicitly. The results show that dislocation velocity has an antishielding effect on the rigid line tip and a larger dislocation velocity leads to the equilibrium position of dislocation closing with the rigid line. The presented solutions contain previously known results as the special cases.     

消除外界振动影响的象面全息干涉计量

本文提出了参考光和物光采用公共路径进行象面全息干涉计量的一种新方法,消除了外界振动的影响,并且利用象面全息图可以用白光再现,也减少了相干噪声     

ELASTIC INTERACTION BETWEEN WEDGE DISCLINATION DIPOLE AND INTERNAL CRACK

The system of a wedge disclination dipole interacting with an internal crack was investigated. By using the complex variable method, the closed form solutions of complex potentials to this problem were presented. The analytic formulae of the physics variables, such as stress intensity factors at the tips of the crack produced by the wedge disclination dipole and the image force acting on disclination dipole center were obtained. The influence of the orientation, the dipole arm and the location of the disclination dipole on the stress intensity factors was discussed in detail. Furthermore, the equilibrium position of the wedge disclination dipole was also examined. It is shown that the shielding or antishielding effect of the wedge disclination to the stress intensity factors is significant when the disclination dipole moves to the crack tips.