关系数据系统

The cost of this accident will be reduced to the lowest if we reduce the repair time and lessen the water cut range. As a result, analysis of pipe burst is one of the most important spatial analysis functions. Its effective realization consists of three aspects: the high quality data, the topological relation of data and the algorithm.

因此爆管关阀分析是供水管网地理信息系统中重要的空间分析功能之一，它的有效实现是由三个方面组成的：首先是数据录入时要生成高质量的数据，它是前提；其次是数据拓扑关系的建立，它是核心；最后是爆管分析的算法，它是关键。

In this way, the data can be kept the properties as sharing independency security and integrity.

提出了采用关系数据库和文件管理系统及内存数据库实现对不同访问要求的数据的存储和管理，既保证了数据的共享性、独立性、安全性、完整性，又节约了内存，保证系统的响应速度；3。

Methodology of implementing the technique of PDM and Method of applying and developing PDM system in furniture enterprises are studied. Moreover, making an example as typical board structure products, the research analyses E-R diagram of furniture PDM and optimizes its data models. Furthermore, it dedicates to study logic organization mode of furniture product data management with the center of product structure, and provides theoretical basis of relational algebra for the design and development of the database of furniture PDM system.

探讨了PDM技术在家具企业中应用实施以及系统开发的方法学；并且，采用E-R图分析和优化了家具PDM的数据模型，以办公家具中的典型板式结构产品为实例，针对性地探讨了以产品结构为中心的家具产品数据管理的逻辑组织模式，为家具PDM系统数据库的设计开发提供了关系代数理论依据。

This paper brings in three variates including energy consumption, energy price and economic growth on the basis of previous double variate system. Using the data from 1978 to 2004, we do Cointegration Test to see the long relationship among them. Then we build an Error Correcting Model. Moreover, we use Granger Causality Test to re-examine the relationship of the three.

本文在前人简单双变量系统的基础上构建了能源消费，能源价格与经济增长三变量系统，利用1978-2004年的数据，通过协整分析，检验了能源消费，能源价格，经济增长之间的关系，构造了三变量的误差修正模型，并用Granger因果检验进一步验证了三变量之间的关系。

It has the following characteristics: 2D drawings can be maintained with a high degree of consistency of 3D model; CAD /CAPP /CAM are integrated by the generation of comp lete manufacturing information and the integrated digital p roduction line of shell, outfitting and painting is imp lemented basically; the generation of comp lete manufacturing and management information of shell, outfitting and painting lays the foundation for the integration of design, manufacturing and management; the entity and parametrized technology is used to ensure the establishment of ship p roductmodelwith comp lete topology relations; and the data interfaces for the heterogeneous CAD data and information integration ensure the collaborative design for the factories and the institutes.

SPD系统具有如下特点：能保持三维模型与二维图纸的高度一致；通过生成完整的加工制造信息实现CAD/CAPP/CAM集成，基本打通&壳、舾、涂一体化&的数字化生产线；通过生成壳、舾、涂完整的制造和管理信息，为实现船舶&设计、制造、管理一体化&奠定基础；通过实体和参数化技术为建立具有完整拓扑关系的船舶产品模型提供有力手段；并通过与其他系统的数据接口实现异构CAD的数据和信息集成，为厂、所协同设计创造技术条件等。

The study of transcriptive regulatory networks intends to infer regulations between genes from microarr...

基因调控网络模型试图从DNA微阵列等海量数据中推断基因之间的调控关系，从而揭示复杂的生命现象，虽远未完成，但从现有实验数据中重建基因调控网络的工作可以促进在分子和遗传水平上系统地剖析细胞的功能，是功能基因组学中的重要研究内容，也是当前生物信息学和系统生物学研究的最具挑战性的前沿课题之一。

The study of transcriptive regulatory networks intends to infer regulations between genes from microarray data, and reveals the complex life of cell. Also far from being completed, the ability to recreate transcriptive regulatory networks from available experimental data facilitates the systematic dissection of cell function. The research of transcriplive regulatory networks is an important topic in functional genomics, and one of the most challenging questions in the front of bioinformatics and system biology. Several typical mathematical models and their new research developments are discussed concisely.

基因调控网络模型试图从DNA微阵列等海量数据中推断基因之间的调控关系，从而揭示复杂的生命现象，虽远未完成，但从现有实验数据中重建基因调控网络的工作可以促进在分子和遗传水平上系统地剖析细胞的功能，是功能基因组学中的重要研究内容，也是当前生物信息学和系统生物学研究的最具挑战性的前沿课题之一简要评述了几类典型数学模型的最新研究进展。

To study the customer behavior by carrying out Customer Relationship Management in enterprises, we use some relative technology and method of decision tree of data mining to propose a kind of UPTree algorithm of data Mining, which is used to mine a great deal of information hidden in customer behavior.

为了解决在企业中实施客户关系管理，CRM系统中客户行为的定量研究问题，利用决策树的数据挖掘相关技术和方法，提出了UPTree数据挖掘算法，并采用UPTree算法对隐藏在大量客户行为中的信息进行挖掘，从而获取了CRM系统中潜在的客户行为规则，并给出这些行为规则的IF-THEN的描述形式，为企业的科学决策提供依据。

Among them, data-collection is the most important part as well as the interface between the system and the tested object. Data-collection system mainly consists of sensors, digitals, interface board and IPC. Its main task is to measure all status parameters of various working conditions.

数据采集部分主要由传感器、数显表、接口转换板、工业PC组成，其主要的任务是把机车在不同工况下的各种状态参数真实地反映给系统，所以，数据采集的准确与否直接关系到试验系统的精度乃至成败。

The author of this paper participated the beginning phase of the whole Yun-Wan freeway geological exploration work. After lucubrating GIS exploitation technique and reading plenty of correlative references the author realized that geological data management is of practical value to engineering project department. Thus, thanks to those profound data accumulated during previous explorations, the author developed a professional and practical GIS system for Yun-Wan freeway—EGIS based on exploitation flat roof - Arc View.

作者参与了云万高速公路的整个地质初勘阶段的工作，在深入学习了GIS开发技术和在查阅大量相关参考文献的基础上，并了解了工程设计部门对地质资料管理的实际需求，将工作中所收集到的大量地质勘察资料作为基础源数据，在ArcView GIS的开发平台上，针对云万高速公路开发出了专业型的实用GIS系统——工程地质资料管理信息系统，系统由Access关系数据库管理系统建立属性数据库，由ArcView GIS软件来实现对空间数据库的管理功能；以软件本身所提供的Avenue语言和程序设计语言Visual Basic 6.0作为系统的开发语言，并对ArcView GIS软件本身的不足方面，进行了二次开发，使系统的功能得到了增强，让系统使用起来更加方便和完善。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。