快速拉格朗日差分法在巷道锚杆支护计算中的应用

快速拉格朗日法是一种新型的数值计算方法。本文介绍了快速拉格朗日法的基本原理和分析过程；并将这种方法应用于巷道锚杆支护的计算中，对锚杆支护前后围岩的变形进行了对比。结果表明锚杆在控制围岩垂直方向的变形有明显的作用。     

基于CS8900A的工业级嵌入式网络接口实现

介绍了工业级以太网络控制芯片CS8900A—IQ3在嵌入式Internet中的应用，以实例详细对比说明了其在8位和16位两种运行模式下的硬件和软件实现。     

Mathematical modeling of heat transfer process in a variable domain

In this paper, a brief review and generalization of studies on the heat transfer and heat conduction problem in a variable domain are presented. The equations of the process, where the boundary displacement velocity is the control, are obtained taking into account heat inflow. This article was submitted by the authors in English.     

基于大规模定制的产品建模技术及配置过程研究

分析了三种主要的生产模式及其演变,在分析产品族结构形成过程的基础上提出基于配置单元的产品族结构模型,并对配置单元进行了论述。给出实现配置过程的算法并用实例进行验证。     

语言测试及设计

在外语教学中，语言测试是不可缺少的环节之一。本文主要论述语言测试理论，如语言测试的目的、语言测试的类型、语言测试的标准；分析并总结了常见的语言测试项目的设计方法，如：多项选择题的设计、词汇测试的设计、完形测试的设计、阅读理解的设计、听力测试的设计、写作测试的设计；并对测试后得分的计算和分析进行解释。最后提出语言教师了解一点语言测试的知识是很有必要的。     

模糊理论在平显故障诊断中的应用研究

给出了平显信号在线采集、转换的硬件电路。鉴于平显输出信号不确定的特点 ,提出了应用模糊理论进行故障诊断的新方法 ,此法具有一定的参考价值。     

单输入系统的最优闭环极点区域探讨

本文基于无限时域二次型性能指标的最优控制,讨论单输入线性定常系统闭环极点的分布区域问题。文中引入最优闭环极点区的概念,提出不等式寻优法和加权阵寻优法,并举例说明了两种方法在研究最优闭环极点区问题上的应用。     

单次特快波形信号的实时传输技术

论述一种单次特快波形信号的实时传输技术，介绍弹载遥测发射设备的工作概况，该设备从射频频率的角度看，它是一种调频体制的，从射频功率的角度看，它是一种脉冲体制的。该设备不但能传输特快波形信号，而且能传输缓变的常规遥测信号，设计方案新颖，是一种多用途的弹上遥测发射设备。     

计算中心微机系统的安全运行

计算机病毒和各种人为因素的破坏，严重地影响着计算机系统的正常运行，本文提出并讨论了一些微机安全运行的技术方法，特别是硬盘“只读不写”技术的应用。这些方法能较有效地防止病毒的感染和各种人为因素的破坏，保证了微机系统的安全运行，具有一定的推广价值和实用意义。     

Heavy-ion induced genetic changes and evolution processes.

On Moon and Mars, there will be more galactic cosmic rays and higher radiation doses than on earth. Our experimental studies showed that heavy ion radiation can effectively cause mutation and chromosome aberrations and that high-LET heavy-ion induced mutants can be irreversible. Chromosome translocations and deletions are common in cells irradiated by heavy particles, and ionizing radiations are effective in causing hyperploidy. The importance of the genetic changes in the evolution of life is an interesting question. Through evolution, there is an increase of DNA content in cells from lower forms of life to higher organisms. The DNA content, however, reached a plateau in vertebrates. By increasing DNA content, there can be an increase of information in the cell. For a given DNA content, the quality of information can be changed by rearranging the DNA. Because radiation can cause hyperploidy, an increase of DNA content in cells, and can induce DNA rearrangement, it is likely that the evolution of life on Mars will be effected by its radiation environment. A simple analysis shows that the radiation level on Mars may cause a mutation frequency comparable to that of the spontaneous mutation rate on Earth. To the extent that mutation plays a role in adaptation, radiation alone on Mars may thus provide sufficient mutation for the evolution of life.