WINDOWS 95/NT下加密和数字签名的开发与应用

首先介绍了WINDOWS的对称加密、非对称加密、数字签名及验证功能,然后给出了几个应用实例。     

协同设计中基于SP95标准的产品信息模型研究

为了弥补协同设计中产品信息建模对企业内管控集成研究的不足,提出了使用管控系统间集成通用标准SP95进行产品建模.通过分析协同设计环境对产品信息模型的要求,比较了SP95与产品模型数据交换标准在产品信息建模的利弊,探讨了基于SP95的产品模型在协同设计中应用的可行性和必要性,同时阐明了SP95的广阔应用前景和局限性.最后,结合线束行业协同设计的需求,在详细分析线束数据的基础上,建立了基于SP95标准的产品信息模型,并对提出的理论进行了实证.     

惯性/卫星导航系统实际导航性能评估算法

针对惯性/卫星组合导航进行实际导航性能(Actual Navigation Performance,ANP)评估,是保证飞机所需导航性能(Required Navigation Performance,RNP)及航空运行安全的关键。提出了惯性/卫星组合导航系统实际导航性能评估算法,从卡尔曼滤波器位置协方差矩阵开展分析,结合导航数据二维高斯分布特性,求解出标准误差椭圆。根据概率分布特性,将误差椭圆转换为95%概率误差圆,进而计算出ANP值。最后惯性/卫星组合导航数据进行仿真验证。结果表明,方法切实可行,且便于工程实践。     

多线程技术在自动控制系统中的应用

首先简要介绍了操作系统中多线程的概念,然后以混凝土搅拌站为实例,讲述了应用Ｗｉｎｄｏｗｓ９５下多线程技术实现自动控制中的并行控制及应注意的问题。     

钼粉处理新工艺对95%氧化铝陶瓷金属化质量的影响

分别采用传统工艺和新工艺处理了陶瓷金属化用钼粉,并利用激光粒度分析、FESEM、X射线射、金相、扫描电镜、拉伸试验、氦质谱检漏等方法研究了处理前后钼粉的粒度及其分布、颗粒形貌、松装密度、氧含量、相组成,金属化膏层的表面状态,金属化层及界面组织,金属化层的封接强度和气密性。物理性能测试结果表明,新工艺处理钼粉的松装密度明显提高,氧含量增幅明显减小,且无杂相污染。配浆及丝网印刷试验显示,含新工艺处理钼粉的金属化料浆流动性好、固液比高,金属化膏层表面光亮细腻,金属化层致密度高。装管成品拉伸试验表明,含新工艺处理钼粉的金属化层的封接强度提高35%,拉伸后出现断瓷现象;这缘于钼粉容易烧结致密化并形成均匀连通的钼骨架。     

Drivers of non-revenue water: A cross-national analysis

Reducing water losses is seen as key to sustainable water management, but turns out to be challenging. This paper applies a panel data analysis with fixed effects to assess the major drivers of non-revenue water, some of which are under the control of utilities and some of which are not. The analysis finds that the most important drivers are population density per kilometer of network and type of distribution network, which are mostly resulting from urbanization patterns which are factors mostly out of the control of the utility. Yet, low opportunity costs of water losses and high repair costs of water losses have an important adverse effect on water loss reduction. We also found that the country environment in which the utility operates has an important impact on non-revenue water levels.     

ZGM-95型磨煤机的运行特性浅析

对大坝发电有限责任公司厂ZGM-95型磨煤机的原理及其特性、磨煤机运行中的维护及影响磨煤机出力的因素进行归纳分析,提出相关措施,为机组安全经济运行提供有利的依据.     

基于WINDOWS 2000的WEB SERVER的安全设置研究

本文探讨了WINDOWS2000服务器的设置以及检测入侵的方法.     

用WINDOWS 2000构建远程访问服务

远程访问是指客户端利用WAN技术，通过某种远程连接方式登录到本地网络中，微软的WINDOWS2000SERVER提供了比以往更可靠的安全控制，更方便的管理手段和更多种的远程服务协议，采用WIDOWS2000SERVER可以在局域网上实现一个安全，方便，低成本的远程访问服务。     

A phenomenological constitutive equation for Rene 95 PM alloy and its application to isothermal forging process of turbine disk

The flow behavior of Rene 95 PM alloy was studied from 1050 to 1150℃ with strain rate of 1x10-3, 1x102,1x101and 1 s-2. At a given temperature and strain rate, flow curves exhibit a peak followed by flow softening up to a steady state. Moreover, at constant strain, flow stress increases with increasing strain rate and decreasing temperature. An equation relating hyperbolic sine of flow stress to hot working parameters, such as strain, strain rate and temperature, was established by using multiple nonlinear regression method. A very good agreement was found between predicted and experimental flow stress in all the strain range investigated. Application of the constitutive equation in predicting forming loads and flow behavior and temperature distribution in both upper and lower dies in an isothermal forging process of turbine disk of large dimension (about 630 mm) by means of a finite element code was systematically analyzed.