基于Web的XML Web Service的研究

Web服务基于XML的数据交换标准，提供企业将软件作为应用进行发布的网络计算体系，其他客户或用户都可通过Internet访问该在线服务，真正的使企业只面向核心的商务逻辑。本文重点研究了Web服务的核心思想及应用，体系结构，工作流程，从Web服务的创建、发布、到客户端的应用；还讨论了Web服务的安全机制、异步调用。随着微软的．net战略的实施，Web服务将带来第三代网络应用和服务软件的革命。     

Book reviews

Books reviewed in this article:
Eric C. F. Bird, Coastal geomorphology: an introduction
Rex Walford, Geography in British schools 1850–2000
Carolyn Cartier, Globalizing South China
G. P. Chapman, The geopolitics of South Asia: from early empires to India, Pakistan and Bangladesh
N. Blomley, D. Delaney and R. Ford (eds.), The legal geographies reader     

(Un)consensual conversations: betweenness, 'material access', laughter and reflexivity in research

This article addresses the conversational (re)production of research relations, focusing on gender and sexuality in relation to responses, laughter and consensus in interviews. It discusses links to access as an on-going issue, and to wider issues connected to the production of knowledge.     

高速无线网络通信中的ARQ方案综述

自动重发清求（ARQ）是高速无线网络最常用的有效差错控制方法。SR-ARQ和GBN-ARO传统差错控制方案已不适应高速无线需要，PRIME ARQ和SRPB ARQ改进方案优化了确认开销和延迟，数据吞吐量等同于SR-ARQ，但算法简单容易实现。SRPB ARQ更因为精密的没计使其能在多种无线信道中达到最大数据吞吐量，被应用到HiperLAN／2系统中。描述、分析和比较了以上差错控制方案的特征和性能。     

基于角色和任务的访问控制在工作流管理系统中的应用

工作流管理系统（WfMS）是一个应用于企业的业务自动化管理系统,需要一个很好的访问控制机制来进行管理控制。基于工作流管理系统中复杂的权限管理这一安全需求,将基于角色和任务的访问控制机制应用于工作流管理中,使WfMS中的访问控制以任务为中心,达到动态管理的目的,同时由于角色的存在而简化了授权操作的复杂性。最后,给出了实现系统访问控制模块的主要功能类。     

DWDM与光接入技术

介绍了一个利用DWDM技术的高速接入网方案，使终端用户对因特网的访问速率可达到1－10Gb/s。     

乌鲁木齐市建设用地预审审批系统设计与实现

本文在乌鲁木齐市金土工程项目建设的背景下,通过对乌鲁木齐市建设用地预审、审批业务的分析和梳理,建立了建设用地预审、审批业务模型和工作流程,完成了乌鲁木齐市建设用地预审、审批系统的设计与开发,并对系统的架构和应用情况做了简要的介绍。文章在重点介绍了外部交换平台的逻辑架构基础上,详细阐述了一个适应土地垂直管理体制的审批系统中系统的设计与实现。     

电动查阅的系列地图挂图产品的开发与初步设计

文章在电动地图挂图的基础上,寻求探索开发能够逐幅精确定位显示多幅系列的地图挂图,并且能够局部放大比例尺显示和任意选取所要查阅图幅内容的电动系列地图挂图的新产品。     

Elastic lateral-torsional buckling analysis of permanent means of access structure

International Maritime Organization (IMO) adopted a new regulation to request permanent means of access (PMA) for a regular inspection of ship structure. Horizontal platforms for an inspector to walk on should be provided at specified locations. The platform is attached perpendicular to longitudinal bulkheads or side shell like a common longitudinal stiffener. Since the platform is much wider than ordinary stiffeners, a mid-flat-bar is welded in the middle of the platform. The wide platform (i.e. the tall web plate) makes PMA structure prone to lateral torsional buckling prior to overall flexural Euler buckling subjected to axial compression. This study employs the Rayleigh-Ritz method to treat the elastic lateral-torsional buckling of the PMA structure. The deformation of the cross-section can be expressed using six independant parameters. Compared to the previous research for an ordinary stiffened plate (Hughes and Ma, 1996a), two additional parameters are employed to model the deformation of the mid flat bar. This study also proposes a new strain distribution of lateral bending introducing two respective neutral axes for the flange and the mid-flat-bar. Two mathematical models are developed for two cases; one without associated plating, and the other with both the plating and its rotational restraint. In the former, the coupling between the lateral torsional buckling (“tripping”) and the Euler buckling is investigated. In the latter, a plate rotational spring constant is suggested based on extended deformed shape of the plating. For each model, the validity of the proposed method is verified by a comparison with a number of linear buckling analyses carried out using the NASTRAN finite-element program.     

主机网络安全防护技术的研究与应用

采用CONSOLE-MANAGER-AGENT的分布式体系结构，综合入侵检测与访问控制等安全技术，基于网络安全模型P2DR，提出了一个动态和静态相结合，集防护、检测和响应为一体的主机系统可适应综合安全模型；并在此基础上设计和实现了USAMS(UNIX Security Audit Management System)，对涉密网内的主机系统实施综合安全防护。