Windows2000系统服务器的安全配置方法

针对微软Win2000 Server的网络特性和存在问题，就如何对网络服务器进行安全配置进行了描述，以便最大限度地保证服务器的安全。     

基于GPS和GIS的列车定位系统研究

为了克服单独使用GPS的缺点，设计研究了一种基于GPS和GIS（地理信息系统）结合方式的列车定位系统，阐述了系统结构中二者的集成方式，介绍了其关键环节线路GIS地理数据库的建立方法，并讨论了GPS数据与电子地图匹配算法及GPS信息丢失时的数据融合的位置推算法。     

Towards a practical method to establish comparable values of travel time savings from stated choice experiments with differing design dimensions

Individual’s process the information in stated choice (SC) experiments in many different ways. In order to accommodate decisions rules that are used in processing information, there is good sense in conditioning the parameterisation of stated choice design attributes on these rules. In particular, rules might be invoked to cope with the dimensionality of the SC design. In this paper, we investigate the impact of rules such as attribute aggregation and reference dependency on preference profiles for specific design attributes, as well as the design specification, as we vary the dimensionality of an SC design. The heteroscedastic extreme value logit model is estimated to identify the role of design dimensionality and attribute processing rules, after accounting for scale differences across sixteen pooled data designs The empirical evidence, drawn from a study in Sydney of car commuter route choice, suggests that accounting for the way that stated choice designs are processed, given their dimensionality, does make a statistically significant difference on measures of willingness to pay, as does accounting for scale differences between pooled data designs. This evidence has practical value in guiding the design of SC experiments and in adjusting results from different SC designs when comparing the evidence. We propose a simple adjustment formula to use in adjusting VTTS from different studies so that they are comparable. From a practical policy perspective, the evidence sends a warning about the risk of undervaluing mean VTTS if the attribute processing rules are not accounted for.     

浅析高校信息素养教育

21世纪将是知识创新和应用的可持续发展的新世纪.也是以数字技术为支撑的信息时代,它将改变我们的学习方式、工作方式、娱乐方式.为了适应数字化、信息化时代的要求,以培养新世纪人才为己任的高校必须进行一场信息素养教育革命.本文试从四个方面来浅析高校信息素养教育这个问题.     

青藏铁路形象化施工调度管理信息系统的研究与开发

在研究开发青藏铁路形象化施工调度管理信息系统的基础上,讨论了利用地理信息系统(GIS)技术开发系统的主要技术,并介绍了系统的主要功能。     

通信及其信息处理技术的发展与认识

文简要论述了通信技术、信息传输及其处理技术的发展过程,简要论述了模拟通信与数字通信技术的差异,并围绕数字通信的可靠性和信息编译码技术等内容进行了综述和探讨。     

Virtual mobility and organizational reality – a note on the mobility needs in knowledge organisations

This article addresses the potential for reducing international work-related air travelling through the use of information and communication technologies such as videoconferences and e-learning in knowledge companies. It looks at the potential for reducing travel related to such things as meetings and teaching. In the absence of regulations, however, we do not find potential for reducing the number of trips of this type because they do not facilitate face-to-face contacts. Therefore the conclusion is, that policy and planning have to look for other options for pursuing ‘sustainable mobility’ policies in the future.     

计算机联锁输入接口的安全性分析

计算机联锁输入信息的安全性定义,是正确设计输入接口电路的基础。合理选择输入信息采集接点,是实现输入接口安全性和可靠性的重要保证。对于单点采集和双点采集两种方案进行了分析、比较。     

模糊结构弹塑性有限元分析的随机化方法

利用信息熵等效转换原则,将模糊变量转变为随机变量,并给出了模糊结构弹塑性分析的一阶摄动有限元递归列式,推导了含不确定性材料参数的结构刚度矩阵对随机变量的偏导表达式以及对位移向量求导的近似计算式。采用增量理论结合弹塑性分析的摄动递归列式编制了有限元计算程序,并对具有模糊材料参数的板壳结构进行分析。     

信息系统安全风险评估模型及其在铁路客票系统中的应用

提出一种基于模糊综合评判理论的信息系统安全风险综合评估模型与方法,实现量化信息系统安全风险的目标。通过确定信息系统的安全风险因素集、指标集以及因素的权重系数集,建立安全风险模糊综合评估矩阵,并应用于铁路客票预定与发售系统的安全风险评估。铁路客票预定与发售系统包括信息资产和物理资产,受到来自系统本身、外部环境以及人为和自然界的安全威胁。应用建立的信息系统安全风险评估模型,定量计算铁路客票预定与发售系统Web组件的安全风险值。根据计算值确定信息系统中的高风险组件,为系统管理与使用部门采取相应的防护技术和管理措施提供理论依据,增强系统安全性。