基于智能代理的CSCW环境工程数据库设计

传统的工程数据库设计方法很难直接用于CSCW环境下工程数据库的设计，本文把智能代理引入到CSCW环境下工程数据库的设计中，对商品化的分布式数据库系统进行了一定的更改，设计了基于智能代理的CSCW环境工程数据库的模型和系统代理的类结构，对智能代理进行了比较深入的讨论，最后给出一个应用实例。     

基于特征智能参数化的设计模型及实例

本文介绍了一个基于特征智能参数化ＣＡＤ系统的设计模型有运行实例。该系统依据形状特征建立包括拓扑关系数据和几何数据在内的工程图样数据库，从而实现产品的智能参数化设计，该系统以机床主轴组件设计作为实例运行，使其智能参数化的设计思想得以具体实现     

泉州市水资源综合调度平台设计与应用

基于泉州市水资源条件、水治理体系与治理能力的现状，针对水资源调配工程体系缺乏开展科学调度的非工程配套措施等实际问题，为有效保障新时期发展阶段全市居民与工农业的用水供水安全，泉州深度融合水资源智能预测与调配模型，基于多源异构、纵横联动、共享服务的水利大数据与智慧水利基座提供的底层支撑能力，通过多业务联动的大数据分析与计算，构建综合决策智能应用，建立以水资源调配业务为核心的综合平台。最大程度赋能水资源优化配置与供给保障，为泉州现代水网工程体系实现“多源互补、丰枯调剂、环境优美”的目标提供有力支撑与强力驱动，助力破解新时期泉州市发展面临的水资源制约问题，为省市一级智慧水利体系的规划建设提供参考，助力国家新阶段水利高质量发展。     

RSVIEW32和VB数据访问技术在选煤生产系统的应用

针对大型选煤厂现况,煤种来源多样化,产品种类繁多,利用Rockwell技术提出了一种新型的基于RSVIEW32实时数据和VB技术结合的选煤配方参数动态加载,利用了最新ADO数据库访问技术,对整个生产系统调配方法进行设计,实现对产能合理分配及调度管理,生产灵活性提高,具有广泛的应用前景和价值。     

基于特征智能参数化的设计模型及实例

本文介绍了一个基于特征管能参数化CAIJ系统的设计模型及运行实例。该系统依据形状特征建立包括拓扑关系数据和几何数据在内的工程图样数据库，从而实现产品的智能参数化设计。该系统以机床主轴组件设计作为实例运行，使其智能参数化的设计思想得以具体实现。     

大型网架结构智能监测系统的工程数据库设计

随着大型工程建设项目的快速发展，对网络和计算机的依赖程度不断提高，对工程建设项目系统的要求也不断提高。为了更好地开发大型工程建设项目系统软件，设计出良好的工程数据库系统，文中以大型网架结构智能监测系统为例，探讨了在复杂的大型工程建设项目中，面向实时的海量的数据进行工程数据库设计的技术和方法。在大型工程建设项目中，必须考虑多方面因素，采用面向对象技术、实时数据库技术、分布式处理技术等多种技术，取长补短，才能设计出良好的工程数据库系统。     

约束TIN在土石方工程三维辅助设计中的应用

为适应水利水电领域土石方工程设计高效、直观的需求,提出基于约束不规则三角形网格(TIN)的土石方工程计算机三维辅助设计的集成建模方法.通过开发具有输入输出、图形预处理、约束TIN建模、挖填方量计算等功能的土石方工程三维辅助设计程序,能够方便快捷地实现土石方工程设计成果三维可视化建模和工程完建形象的直观显示,为设计和决策者进行工程土石方量计算、土石方调配平衡分析提供依据,三维辅助设计成果也可作为组织开挖施工的可视化决策信息.     

FT＆MEDB系统总体结构设计

用计算机网络应用技术和层次式关系数据库的理论，收集、管理试飞过程中所产生的数据和技术资料，建立相应试验对象的数据库系统。加强试飞及测试工程等数据信息资料在航空科研工程中的实际应用。根据当前大型工程数据库的构架方案，结合当前技术和飞行试验与测试工程数据库（FT＆MEDB）的特点，给出系统的总体结构，根据总体结构，选择了合适的开发平台，并在此基础上，给出系统的整体工作流程及网络监测设计。     

不正常航班恢复的飞机和乘客优化调配模型

现实生活中有很多因素影响航空公司的正常运营,比如飞机故障、极端天气、航空管制等,这些问题的产生不仅增加了航空公司的运营成本,而且还给乘客带来许多损失。为了降低航空公司的运营成本和乘客的损失,从飞机调配和受干扰乘客的重新调配出发构建模型,通过IBM ILOG CPLEX软件对两个模型进行求解,并获得了备用恢复行程的飞机调配方案和受干扰乘客的重新调配方案。通过实际算例验证了该模型的有效性和实用性。     

智能配电网技术方案的应用设计

分析了能量流、信息流及业务流在传统配电网、数字配电网及智能配电网中的不同特征,提出了智能配电网的技术方案,给出了完善电网基础设施(即能量传输系统-配电网网架)、通信传输系统平台以及相关的智能配电终端的设计方法;构建了智能配电网调度系统、配电自动化系统、用电管理系统及其构成的调配一体化系统、配用一体化系统、调配用一体化系统的基本功能、基础应用和高级应用架构,并对各个环节的关键技术组成进行了探讨。     

Five Steps to Construct a Model of Data Allocation for Distributed Database Systems

The allocation of data to nodes in a computer communications network is a critical issue in distributed database design, specially in wide area network where optimizing the distributed queries is the main objective. Numerous models of data allocation have been presented so far (Ceri and Pelagatti, 1986; Lee et al., 1994; Apers, 1988; Mahmood et al., 1994; Theel, 1994; Saha and Mukherjee, 1994; Walfson and Jajodia, 1995), but no optimal or universally accepted algorithm exists yet, and very few algorithms have been implemented to date (Rob and Cornonel, 1993). In this paper a method to construct a model of data allocation for distributed database system has been proposed. The adopted method for the construction of the data allocation model leads to an efficient model of its kind. The proposed model not only solves distributed database design problem, but also solves distributed database maintenance problem by covering initial allocation and post allocation of the data. The efficiency of proposed model has been proved by comparing proposed model with other relevant models.     

Evolutionary Algorithms for Allocating Data in Distributed Database Systems

A major cost in executing queries in a distributed database system is the data transfer cost incurred in transferring relations (fragments) accessed by a query from different sites to the site where the query is initiated. The objective of a data allocation algorithm is to determine an assignment of fragments at different sites so as to minimize the total data transfer cost incurred in executing a set of queries. This is equivalent to minimizing the average query execution time, which is of primary importance in a wide class of distributed conventional as well as multimedia database systems. The data allocation problem, however, is NP-complete, and thus requires fast heuristics to generate efficient solutions. Furthermore, the optimal allocation of database objects highly depends on the query execution strategy employed by a distributed database system, and the given query execution strategy usually assumes an allocation of the fragments. We develop a site-independent fragment dependency graph representation to model the dependencies among the fragments accessed by a query, and use it to formulate and tackle data allocation problems for distributed database systems based on query-site and move-small query execution strategies. We have designed and evaluated evolutionary algorithms for data allocation for distributed database systems.     

基于本体模式的分布式数据最优分配方法

随着网络技术的发展,分布式数据库应用越来越广泛。将数据存储在合适的位置不但能够提高数据处理的效率,而且能够减少数据处理的成本。近来的大多数研究都侧重于已存在的数据库,通过分析系统操作历史来研究数据分配问题。论文提出一种基于本体模式的分布式数据库系统构造及需求分析方法,用于解决分布式数据库的数据分配问题。     

Adaptive channel and power allocation of downlink multi-user MC-CDMA systems

The Multi-Carrier Code Division Multiple Access (MC-CDMA) is becoming a very attractive multiple access technique for high-rate data transmission in the future wireless communication systems. This paper is focused on the joint channel and power allocation in the downlink transmission of multi-user MC-CDMA systems and considers the throughput maximization problem as a mixed integer optimization problem. For simple analysis, the problem is divided into two less complex sub-problems: power allocation and channel allocation, which can be solved by a suboptimal Adaptive Power Allocation (APA) algorithm and an optimal Adaptive Channel Allocation (ACA) algorithm, respectively. By combining APA and ACA algorithms, an adaptive channel and power allocation scheme is proposed. The numerical results show that the proposed APA algorithm is more suitable for MC-CDMA systems than the conventional equal power allocation algorithm, and the proposed channel and power allocation scheme can significantly improve the system throughput performance.     

双机同步热备方法研究

随着对系统工作可靠性的要求越来越高,双机在线热备在多个工程项目中广泛采用,继而对双机数据同步和在线数据备份也提出了相关需求,根据工程中的实际需求,针对双机数据同步和数据在线备份的解决方法做了深入的研究。通过对Oracle数据库的深入学习,利用Oracle数据库的数据能够根据约束条件实现分区存储的特点,提出了一种双机数据同步,数据库存储数据在线备份的解决方案,为相关人员提供了极有价值的参考信息和有效方法。     

元数据标准化在教育资源库共享中的应用

目前我国各院校的教育资源库的建设缺乏统一规划,存在重复建设、数量庞杂、形式不规范等问题,使得网络远程教育系统中资源信息不能有效共享传播。为提高网络教育资源的利用率,共享不同结构的资源库的数据,设计一个教育资源元数据管理平台模型,并提出了基于XML的教育资源库元数据标准化的方案,研究了基于模板的XML数据转换方法,通过指令的执行,并应用教育资源元数据标准,将其他格式的数据通过模板转化成XML文档,从而实现不同教育资源库之间数据的互换和共享。     

A fuzzy membership filtering aided neural network based transmission loss allocation scheme using game theory

The present paper proposes development of a transmission loss allocation scheme in a deregulated environment using fuzzy memberships and supervised neural networks. This method can be effectively utilized in online applications where game theory based solutions, which otherwise produce acceptable results, cannot be utilized for prohibitive computation load. We propose a fuzzy membership based approach to filter data from a global database and create a local relevant database, for each transaction detail online, each time. A neural network is trained for each such local database formed and utilized for estimating loss allocations among players, for the transaction detail under consideration. The proposed method has been employed for an IEEE 14 bus system and the results of our proposed method have been shown to be sufficiently accurate, when compared to results obtained by using game theoretic approach.     

HDTV视频编码器系统子图分割并行处理单元的设计与实现

设计了遵循MPEG-2MP@HL压缩标准的HDTV视频编码器基于水平条状分割系统方案的协议结构、实现模型和控制流程，同时也提供了后端并行编码的各子编码器压缩子码流合成的实现机理。分割并行处理方案必须处理两个关键问题：子图序列编码及拼接的同步、子图压缩码率的分配。本文着重就前者的设计实现进行了详细分析,根据设计的分割方案定义了特定的图像数据接口协议，确保从基本物理层结构到应用层规范都符合HDTV视频编码器的性能。同时在尽可能满足图像质量一致性的基础上，基于几种码率分配策略提供了系统测试结果。     

Development and evaluation of an integral sliding mode fault‐tolerant control scheme on the RECONFIGURE benchmark

This paper describes the development, application, and evaluation of a linear parameter‐varying integral sliding mode control allocation scheme to the Reconfiguration of Control in Flight for Integral Global Upset Recovery benchmark model to deal with an actuator failure/fault scenario. The proposed scheme has the capability to maintain close to nominal (fault free) load factor control performance in the face of elevator failures/faults by including a retrofitted integral sliding mode term and then rerouting (via control allocation) the augmented control signal to healthy elevators without reconfiguring the baseline controller. In order to mitigate any chattering appearing in the elevator demands, the retrofitted signal is based on a super‐twisting sliding mode structure. This produces a control signal that is continuous and does not have the discontinuous switching nature of traditional sliding mode schemes. The scheme is evaluated using an industrial Functional Engineering Simulator developed as part of the Reconfiguration of Control in Flight for Integral Global Upset Recovery project. Monte Carlo campaign results are shown to demonstrate the performance of the proposed scheme.     

基于Oracle9i的复制技术及应用

复制作为一个重要的技术,为分布式数据的存储和处理提供了有力支持。在实际应用中,数据复制已经成为各数据库保障数据安全一致、均衡数据库负载的重要手段之一。在介绍数据库复制技术的基础上,讨论了ORACLE9i的多种复制机制。结合一卡通工程项目开发,系统采用Client／Server结构,在WindowsNT环境下,讨论了基于ORACLE9i的复制技术的具体应用,描述了一个数据库复制技术的实现方案。