远程数据库访问系统客户／服务器体系结构模型的设计与实现

远程数据库访问（ＲＤＡ）是ＯＳＩ应用层一个特别应用服务元素（ＳＡＳＥ），是数据库基础标准，是构造分布数据库开放式体系结构的基础．本文遵照国际标准ＲＤＡ模型、服务、协议，研究并给出实现ＲＤＡ客户／服务器体系结构模型、方法与系统原型。

基于OS／2的客户／服务器体系结构

本文阐述了客户／服务器计算的特点，介绍了ＯＳ／２２·１操作系统为客户／服务器计算模式所提供的各类支持。最后，就以ＯＳ／２为操作系统构建客户／服务器结构的可能模式进行了分析与讨论。

客户／服务器环境下的OS／22·1操作系统

ＯＳ／２２·１是当今客户／服务器计算模式的首选操作系统之一。本文对ＩＢＭＯＳ／２２·１操作系统所具备的，对客户／服务器计算模式的各种支持功能作了详细的介绍。

CIMS环境下的使能器技术及其应用

本文阐述了ＣＩＭＳ中异构分布式数据库环境下基于并行客户／服务器结构的使能器技术、功能及其结构。并讨论了使能器技术在ＣＩＭＳ环境下的应用研究。

120通信指挥系统的呼救处理子系统程序设计

随着计算机技术的发展与国民生活水平的提高，计算机管理与通信技术已被广泛应用于国民生活的各个角落。社会公共服务部门原有的管理体制与运作手段已不再适应社会发展的需要，如何改造旧体制及将新的技术应用到了人民群众的日常生活中成为计算机应用研究员的一个主要课题。120急救部门是社会基础设施的重要组成部分，直接关系到人民的健康与生命，所以实现急救部门的灵活与高效具有重要的现实意义。“120通信指挥系统”的总体目标就是实施急救工作的全程实时控制和信息处理，为指挥与抢救工作提供服务。本文以“120通信指挥系统”为背景，探讨并运用了科学的软件工程技术，力求以最优方法实现呼救处理子系统，辅助急救调度工作的有效实施。呼救处理子系统的主要用途是完成接警、调度以及用急救任务的下达。在整个处理过程中应用地理信息系统提供数字地图，并与后台数据库进行数据交互。论文中采用了第四代编程语言VB能及Client/Server技术实现接警高度过程的计算机化，并在接警过程中应用专家系统技术提供简单的病情诊断为急救工作人员的指挥调度提供依据。系统的开发为计算机技术在社会公共服务部门的应用提供了一条新思路。

地震反射系数成像方法研究

Reflectivity sequences extraction is a key part of impedance inversion in seismic exploration. Although many valid inversion methods exist, with crosswell seismic data, the frequency brand of seismic data can not be broadened to satisfy the practical need. It is an urgent problem to be solved. Pre-stack depth migration which developed in these years becomes more and more robust in the exploration. It is a powerful technology of imaging to the geological object with complex structure and its final result is reflectivity imaging. Based on the reflectivity imaging of crosswell seismic data and wave equation, this paper completed such works as follows: Completes the workflow of blind deconvolution, Cauchy criteria is used to regulate the inversion(sparse inversion). Also the precondition conjugate gradient(PCG) based on Krylov subspace is combined with to decrease the computation, improves the speed, and the transition matrix is not necessary anymore be positive and symmetric. This method is used to the high frequency recovery of crosswell seismic section and the result is satisfactory. Application of rotation transform and viterbi algorithm in the preprocess of equation prestack depth migration. In equation prestack depth migration, the grid of seismic dataset is required to be regular. Due to the influence of complex terrain and fold, the acquisition geometry sometimes becomes irregular. At the same time, to avoid the aliasing produced by the sparse sample along the on-line, interpolation should be done between tracks. In this paper, I use the rotation transform to make on-line run parallel with the coordinate, and also use the viterbi algorithm to complete the automatic picking of events, the result is satisfactory. 1. Imaging is a key part of pre-stack depth migration besides extrapolation. Imaging condition can influence the final result of reflectivity sequences imaging greatly however accurate the extrapolation operator is. The author does migration of Marmousi under different imaging conditions. And analyzes these methods according to the results. The results of computation show that imaging condition which stabilize source wave field and the least-squares estimation imaging condition in this paper are better than the conventional correlation imaging condition. The traditional pattern of "distributed computing and mass decision" is wisely adopted in the field of seismic data processing and becoming an obstacle of the promoting of the enterprise management level. Thus at the end of this paper, a systemic solution scheme, which employs the mode of "distributed computing - centralized storage - instant release", is brought forward, based on the combination of C/S and B/S release models. The architecture of the solution, the corresponding web technology and the client software are introduced. The application shows that the validity of this scheme.