一类二维Landau-Lifshitz方程的差分格式

研究了一类unj的模等于1保持不变的Landau-Lifshitz方程的差分格式(简称LL).运用迭代格式t/2h2,通过模拟几个初始条件得到数值解,并在一定条件下给出了数值算例和解的误差比较.     

Experimental measurements of flow and flame spread in the development of a fire testing facility

A fire testing facility named the “MSU Fire Tunnel” has been developed. The intent was to devise a testing apparatus that controlled the flow of oxidizing gas in the tunnel to an extent not heretofore accomplished. A novel approach was developed for mounting the flame-spread samples flush with the surface of an “airfoil”. This method avoids previous complications of determining the exact position of the leading edge of the velocity boundary layer. Data were gathered for the flow field using hot-wire anemometry. These data indicated that a zero-pressure gradient Blasius boundary layer flow was established along the airfoil and fuel sample surfaces. Opposed-flow flame-spread tests were conducted and correlations were produced that support the predictive capacity of this apparatus. It was shown that the opposed flow flame-spread data allowed distinctions to be made between correlations of previous researchers. No such comparisons were formerly possible. A finite-chemistry correlation was shown to be consistent with, and similar to, correlations derived in the previous work.     

The changing role of physical testing in vehicle development programmes

The role of physical testing in product development is changing due to the requirements for faster new product development, reduced tolerance of failures in the field and the emergence of computer aided engineering (CAE) technologies. To be used most effectively, testing must be seen as an integral part of the process for reducing risks associated with new product introductions. Quality function deployment (QFD) and failure modes and effects analysis (FMEA) can be used to establish effective test and development plans that integrate the use of virtual and physical testing. By effectively integrating virtual and physical test technologies significant improvements in product performance can be achieved within shorter times and with reduced development and manufacturing costs. The approach was illustrated by a process of reducing in-cab noise during the design of a new truck.     

如何用统计软件SPSS进行英语测试分析

语言测试是外语教学中校其重要的组成部分，是检查、促进教学的重要手段。测试的结果可以为教学提供反馈，帮助教师了解学生的学习情况，改进教学方法。而对测试结果的分析，需要科学的工具方法。本文以一组测试成绩数据为例，探讨了如何用统计软件SPSS对测试成绩原始数据进行科学的统计分析，从而为教学提供指导性的反馈意见。     

论儒家“道之以德”教育方法的现实意义

儒家认为道德教育首先是对教育者的要求，在道德问题面前，教育者必须首先反思自己，而不是只对受教育者的指责。这种在问题面前要求教育者首先有道德“道之以德”的方法是一种真正具有“德性”的教育方法，对于改善当前因方法造成的德育困境具有重要的现实意义。     

Sixty years of engineering blasting in China： Review and prospect

Based on representative blasting engineering examples, the development history of engineering blas- ting in China since 1950s was reviewed, three development phases were summarized, and the main achieve- ments of fundamental theory, engineering practice, scientific study and industry organization of engineering blasting in each phase were introduced briefly. Finally, some suggestions about the development direction of en- gineering blasting in China were given.     

热释电系数测试系统的研究

介绍了热释电系数的测量原理,建立了一套热释电系数的测量系统,并就热动态电流法中恒定温度变化率的温控系统进行了深入的讨论。     

试桩未达破坏时单桩极限承载力的估算方法

对常用几种估算未达破坏试桩的单桩极限承载力方法进行了总结、讨论,从理论上证明了麦随基威克司法（作图法）的合理性,在此基础上,编制了程序。计算结果表明,该方法具有较高的精度。     

基于多元分类树示例学习算法的改进

以往基于多元分类树示例学习算法的适用范围，只限于每优选一个属性结点都至少能导致一个树叶结点的情况。本文给出的改进算法无此限制，从而拓宽了基于多元分类树示例学习方法的应用范围。     

求解线性系统的并行算法研究

研究了求解线性系统的神经网络算法,提出并证明了神经网络算法的收敛性定理,该算法不涉及矩阵的逆运算和除法运算,不受条件αii≠0的限制,对于严重病态的线性系统也能得到高精度解．给出的应用实例验证了算法的有效性．