复杂信息系统数据库设计

本文结合天津港管理信息系统数据库设计的过程,提出了对复杂信息系统数据库设计的方法和步骤,该方法综合了现有的数据库设计方法,突出了数据库设计过程的工程化、规范化和文档化的特点。     

传感器网络数据库并行计算设计与应用

根据传感器网络数据库技术自身的特点以及应用情况,结合传感器网络数据库技术实际的设计过程,对传感器网络数据库查询处理功能进行优化处理,对传感器网络数据库并行计算设计与应用进行探讨。通过系统设计之后,使用的成效得到了很大的提升。经过调整可以改进系统性能,但是还需要对其开展更加深入的研究。     

VLSI数据库系统的物理设计和实现技术

在VLSI芯片的设计过程中,所牵涉到的设计数据的数量是巨大的,数据库管理系统则起着十分重要和不可替代的作用。本文依据VLSI设计过程的特点和要求以及设计数据的类型与特征,研讨适用于VLSI CAD系统中的数据库管理系统的物理设计和实现问题,同时给出一个实际设计的VLSI数据库系统的数据模型和组织方式以及物理结构。     

高校科研信息管理系统数据库设计

在信息系统设计过程中数据库设计有着很重要的地位。数据库设计的好与坏,直接影响到系统的开发周期、运行效率,以及系统的维护。从便于应用程序实现的角度出发,探讨了高校科研信息管理系统数据库设计的实现过程。     

PHP技术支持的基因数据库Web平台构建

PHP技术是计算机网页设计的重要应用技术,使用PHP技术进行计算机网页平台的设计开发应用,不仅具有较快的开发设计与构建速度,并且在进行计算机网页设计构建的过程中操作也比较简单,具有较大的应用优势。本文主要结合生物基因数据库的特点,以及PHP技术进行计算机网页平台构建设计的应用优势等,从PHP技术支持的计算机生物基因数据库网页平台的软件配置、系统流程设计、基因数据库网络实用技术等方面,对于PHP技术支持的基因数据库Web平台构建过程进行分析论述。     

探讨计算机软件数据库设计原则

随着社会的不断发展,计算机软件也在不断的开发及进步,在计算机软件开发的过程中,当然也离不开数据库的设计.数据库设计是计算机软件开发中最重要的核心部位,可以使整个计算机软件系统在运行的过程中具有稳定性.数据库设计的水平及指令,影响着计算机软件系统在之后工作的过程中是否能够高效且平稳的运行,所以数据库设计在计算机软件中有着至关重要的作用.基于此,本文就进一步探讨计算机软件数据库设计的原则.     

实用内存数据库核心及其在VLR系统中的应用

从实际应用的角度出发,引出内存数据库的定义及其系统特点,采用面向对象的软件设计方法设计内存数据库的内存组织结构,介绍内存数据库的核心对象并简单说明表对象操作方法的实现过程。结合移动网络中的VLR实体,简单阐述实用内存数据库在通讯领域的应用。     

计算机软件数据库设计的重要性以及原则研究

数据库设计在计算机软件开发的过程总占据非常重要的地位,本文研究的重点便是计算机软件设计过程中数据库设计的重要性以及一些原则,良好的数据库设计规范不仅能够简化计算机软件的开发难度,还能够提升系统的运行效果。     

一种面向对象的数据库设计方法

数据库设计在管理信息系统(MIS)的分析、设计和开发中占据非常重要的地位。本文通过分析大型MIS环境下数据的特点,深入研究国内外有关数据库设计方法,结合铁道部昆明机械厂初步设计和详细设计的工作,提出一种基于面向对象的数据库设计方法。     

数据库设计的工程化方法及应用

本文结合四川石油管理局管理信息系统开发分系统的数据库设计过程,介绍数据库设计的一种工程化方法。该方法综合了现有的设计方法,突出了设计过程的工程化、规范化和文档化。     

工程数据库系统的设计事务模型

本文提出了工程数据库系统ＯＳＣＡＲ的设计事务模型，该模型既体现了工程设计过程的全局试探特征，也体现了其局部试探特征，本文同时给出该模型的一种基于影子页面和日志技术的实现方法。     

Development of a simple model for batch and boundary information updation for a similar ship’s block model

In early 2000,large domestic shipyards introduced shipbuilding 3D computer-aided design (CAD) to the hull production design process to define manufacturing and assembly information.The production design process accounts for most of the man-hours (M/H) of the entire design process and is closely connected to yard production because designs must take into account the production schedule of the shipyard,the current state of the dock needed to mount the ship’s block,and supply information.Therefore,many shipyards are investigating the complete automation of the production design process to reduce the M/H for designers.However,these problems are still currently unresolved,and a clear direction is needed for research on the automatic design base of manufacturing rules,batches reflecting changed building specifications,batch updates of boundary information for hull members,and management of the hull model change history to automate the production design process.In this study,a process was developed to aid production design engineers in designing a new ship’s hull block model from that of a similar ship previously built,based on AVEVA Marine.An automation system that uses the similar ship’s hull block model is proposed to reduce M/H and human errors by the production design engineer.First,scheme files holding important information were constructed in a database to automatically update hull block model modifications.Second,for batch updates,the database’s table,including building specifications and the referential integrity of a relational database were compared.In particular,this study focused on reflecting the frequent modification of building specifications and regeneration of boundary information of the adjacent panel due to changes in a specific panel.Third,the rollback function is proposed in which the database (DB) is used to return to the previously designed panels.     

数据库逻辑设计中消除规范化处理问题

关系数据库设计要求规范化处理的过程以消除数据冗余和更新异常问题. 范式化理论的算法与数据依赖有着直接的联系, 数据依赖中最重要的是函数依赖, 识别该依赖既耗时又复杂. 讨论如何在采用ER模型的数据库逻辑设计步骤中消除规范化处理过程, 在概念结构设计过程中遵循一组规则将产生满足3NF范式的初始关系模式集, 以节省数据库设计者在导出初始关系模式集后的规范化处理步骤.     

基于实例设计中的产品数据模型及实例库设计

在基于实例的产品设计中,产品数据模型的建立和产品数据结构的设计对于产品相似实例的检索与撮有着至关重要的影响。该文分析了递阶结构表达方式的不足,利用扩展的实体关联（ＥＥＲ）表达方式建立了产品的数据模型,并以油泵产品为例建立了产品数据模型的展开结构。在ＥＥＲ模型向关系模型的转化中,提出了４条转化规则,同时以油泵产品为例,设计了产品主关联数据库和子实例库,实现了实例按属性空间和功能空间进行检索的功能。     

An object-oriented database management system for computer-aided design of tall buildings

An effective database and database management system is the key to the success of an integrated approach to software engineering applications in general, and Computer-Aided Design (CAD) for structural applications in particular. Due to the inherent nature of CAD data such as dynamic modeling, a wide range of data types, large data volume, etc., the traditional database models, such as hierarchical, network and relational models, are unable to handle the aforementioned applications satisfactorily. An object-oriented data modeling is known to be the most effective approach. However, many of the commercial object-oriented databases are designed for information management, and they are inadequate for CAD application due to the different features of the object-hierarchy and varying data management objectives during the design cycles. This paper presents a hierarchical index-based object-oriented database management model for CAD applications. To deal with the object hierarchy encountered in CAD for the design of tall buildings, the proposed database consists of several salient features: a hierarchical object model, its related storage structure, a data dictionary, a class factory and an index system. The proposed database management model has been implemented into an integrated CAD system for design application of tall buildings.     

Using an entity model to drive physical database design

Logical relational database design, because of its implementation-independent nature, has been successfully formalized. Physical relational database design, because of its implementation-dependent nature, has remained largely unformalized and disconnected, not only from logical design but also from conceptual database design. The paper suggests a model for the physical design process that has proven useful in a number of practical development projects. The model demonstrates that a seamless join between conceptual, logical and physical design work is feasible. It illustrates how the process of annotating a conceptual model with physical detail provides a useful framework for driving the process of physical relational database design.     

设计管理理念下的设计沟通模式探讨

在以团队合作为主要形式的现代设计活动中,设计沟通对于设计目标的达成意义重大。不同的设计组织和设计程序在沟通的层次上效果是不同的,也带来各式的问题。文章结合设计圈的组织形式和重叠设计的特点提出立体设计模式,这种模式在组织上和程序上有利于高效高质的设计沟通,从而提高设计活动的效率及质量。     

数据库系统设计中的面向对象技术研究

基于面向对象技术的基本思想和开发过程,介绍了面向对象技术的实现方法.结合具体实例对面向对象技术在数据库系统结构设计和详细设计中的应用进行了详细的探讨,利用面向对象的数据库系统分析和设计方法,使用UML工具建立了具体的对象模型,给出了一种比较通用的数据库系统开发模式.使用该模式设计的系统重用性好,且易于维护,从而有效提高了数据库系统的开发质量.     

A methodology for brand feature establishment based on the decomposition and reconstruction of a feature curve

For creative products, maintaining original brand elements and features in a new product is an important issue in the design process as brand features are conceived and generated for longevity. However, current methods rely on designers’ abilities, and the size of forms is easily affected when shape morphing is applied, causing limitations in computer-aided design. In order to focus on design while preserving key features, a systematic method for presenting brand features is proposed in this article. In this method, the feature curves of the brand features of a company are decomposed with defined feature parameters, which were then used to reconstruct the feature curve of the designed product in the design stage by using a residual modified gray prediction model. A classic vehicle configuration design is taken as an example to show the implementation procedure of the proposed method. With residual modification, this method can also assimilate other forms from the original form database, and generate new forms based on gray prediction. The results show that brand features can be retained in the newly designed product based on the proposed method. Though vehicle design is taken as the example, this method can also be used to develop designs for many other the brand features. For classic products with historical value, this method can generate new forms that maintain original brand features, thereby satisfying customers’ needs for brand authenticity.     

银行数据仓库的系统设计与实现

企业中的数据存在于各个异构的传统数据库系统中,数据仓库是企业整合数据的一种有效途径。数据仓库使得企业的信息变得易于获取并且为企业决策提供可靠依据。然而建设一个企业级数据仓库是一项巨大的工程。根据数据仓库的特点和功能以及软件设计的模块化思想,提出一种三层数据模型结构,即面向企业全局视图的逻辑层数据模型(LDM)、面向数据处理的ETL数据模型和面向前台展示的分析层数据模型(ADM)并在银行系统中予以实现。