Optimal design of optical performance of reflective ferroelectric‐ and anti‐ferroelectric liquid‐crystal displays

Abstract— In an in‐plane optical geometry, such that the average optic axis lies on the plane parallel to both substrates, the optical properties of a reflective ferroelectric liquid‐crystal (FLC) or antiferroelectric liquid‐crystal (AFLC) cell were studied within the framework of the 2 × 2 Jones matrix formalism. To obtain good achromaticity and high brightness, the cell parameters such as the molecular rotation angle and the effective phase retardation of the AFLC layer were optimized. The device performances of the AFLC cell were experimentally demonstrated in this geometry.     

嵌入式系统中CPLD器件的在系统编程

介绍了JTAG，即IEEE 1149．1标准和用来描述JTAG总线标准的SVF语法规范，以及在嵌入式系统申如何利用SVF语法规范实现对CPLD器件的在系统编程。     

稀土化合物RE2Ge2In(RE=Ce,Pr,Nd)的磁性和晶场效应

基于晶场理论和分子场理论,采用点电荷晶场模型,通过模拟Zaremba小组的磁化率实验结果,得到了稀土化合物RE2Ge2In(RE=Ce,Pr,Nd)的晶场分裂能和相应波函数。计算表明,Kramer离子Ce3 和Nd3 在晶场效应的作用下简并部分消除得到了双基态,而非Kramer离子Pr3 分裂后得到了单基态。计算得到的Ce2Ge2In的第一激发能和总分裂能与Adroja小组中子散射实验结果吻合较好。     

对远程设备在线重新编程的一种方法

论述了对远方终端的在线重新编程的一种实观方法，包括远方终端的硬件、软件设计方案，主站的通信软件设计。该文的远程设备为80C196系统，该方法在不中断系统运行的情况下，通过任何一种通信方式，远程更新设备功能。     

EDA技术在现代电路与系统设计中的应用

本文介绍了ISP硬件电路设计技术，借助模拟信号检测仪的研制过程，说明用ISP技术设计现代电路与系统的方法及具有的优点。     

铜铟镓硒薄膜太阳能电池的发展现状以及应用前景

首先介绍了铜铟镓硒薄膜太阳能电池结构、性能特点以及目前在研究和生产过程中电池的制备方法和工艺;着重阐述了工业发达国家以及相应大公司在铜铟镓硒薄膜太阳能电池方面最新进展以及发展趋势,特别介绍了一些太阳能电池的实验室样品和组件的最高光电转化效率.也对国内在此方面的研究做了简要介绍.文中最后探讨了我国发展铜铟镓硒太阳能电池的可行性和产业化前景.     

长玻纤增强ABS复合材料的性能研究

采用原位聚合方法制备长玻纤增强ABS复合材料 ,并将其与传统工艺的短玻纤增强ABS作了比较。结果表明 ,采用新工艺 ,可以达到比传统工艺更好的增强效果。并研究了玻璃纤维含量对复合材料性能的影响     

固相合成In2O3纳米晶及动力学的研究

以InCl3·4H2 O和NaOH为原料 ,利用固相反应合成前驱体 ,再经焙烧合成In2 O3纳米晶。用X射线衍射 (XRD)分析了不同焙烧温度对合成In2 O3晶粒尺寸的影响。研究结果表明 :按Scherrer公式估算合成In2 O3纳米晶的晶粒尺寸在 2 0～ 3 0nm ,焙烧温度越高 ,晶粒尺寸越大 ;根据前驱体不同升温速率下的差热 (DTA)曲线 ,用Kissinger和Ozawa法计算了合成In2 O3纳米晶的活化能分别为 167.0 3和 176.0 6kJ·mol- 1 ,差别不大 ;根据晶粒生长动力学理论计算In2 O3晶粒长大的活化能为 2 .82kJ·mol- 1 ,表明热处理过程In2 O3纳米晶粒的长大主要以界面扩散为主。     

社会保障应突出以人为本的文化价值

社会保障制度作为社会文明和社会进步的成果,作为现代市场经济时代一个国家基本经济社会制度的组成部分,必须体现以人为本的价值、体现一种现代文明社会的公平性原则,起到社会安全网的作用。中国在市场经济转型过程中,应加快建立健全与经济发展相适应的社会保障制度的建设,把以人为本作为改革发展战略中基本性的问题,以解决贫困问题为重点,从惠及部分社会成员转到覆盖全体社会成员。     

In situ Sea Ice Experiments in McMurdo Sound: Cyclic Loading, Fracture, and Acoustic Emissions

The breakup of first-year sea ice plays an important role in the dynamics and thermodynamics of polar ice covers. A recent research program has studied the in situ mechanical properties of the annual ice in Antarctica to support the development of physically based models of the breakup process. As part of this effort, two field trips were conducted to McMurdo Sound, and the present paper describes the experimental work and presents selected results. The in situ experiments investigated the constitutive and fracture behavior of edge-notched, square plate specimens of first-year ice and involved a detailed characterization of the physical properties and thermal state of the ice. Acoustic emissions, which are generated by microcracking, were monitored in the crack tip vicinity and provide insight regarding the size of the process zone. The paper describes the physical properties and microstructure of the sheet, the cyclic-loading response, and the acoustic emissions activity from an extensive series of experiments conducted on one of the in situ specimens. Varying the cyclic-loading frequency and amplitude provided a means to examine rate effects on the anelastic and viscous components of strain and the extent of microcracking near the crack tip. The viscous deformation rate estimated from the experiments exhibited an increasing power-law exponent with values between one and three. Acoustic emissions monitoring indicated that microcracking occurred in a process zone near the crack tip, and the size of the process zone increased with decreasing cyclic loading frequency. Practical aspects of the experiments are considered, and the results are put into context with the overall modeling goals of the project.