使用Oracle Spatial进行空间数据建模研究

介绍了空间数据建模和管理的常用方法,重点讨论Oracle Spatial的对象关系建模,分析了使用Oracle Spatial组织管理空间数据的特点。基于Oracle Spatial进行空间数据建模,可以降低专业性,提高空间数据的标准化共享能力。     

抗逆基因本体库管理平台建模分析与设计

为了解决本地生物抗逆基因数据自动获取以及生物抗逆基因数据库资源管理及检索的需求,在已有的通用公共数据库资源数据的抗逆基因数据库数据模型基础上进一步扩充,实现抗逆基因资源数据的多样化检索与管理。采用UML建模语言中的用例图进行需求建模,类图进行数据建模,以及顺序图进行业务建模,完成抗逆基因管理系统的分析与设计。     

Data as models: An approach to implementing model management

The concept of model management as a logical extension and parallel of data management has resulted in attempts to extend existing data models to incorporate modeling functionality. This fosters a data-oriented view which artificially restricts the domain of model management. This paper suggests that a model-oriented approach which views ‘data as a model’ not only expands the scope of model management but also offers a more integrated and balanced conceptual foundation from which to implement model management. On the organizational level, this approach recognizes the transition from informal modeling as exemplified by the use of spreadsheets to formal modeling which manages models as a resource in conjunction with data. The notion of information administration is introduced as an organizational mechanism for controlling this evolution. On the technological level, a generalized model management system (GMMS) is required for support of organizational modeling activities. Geoffrion's structured modeling is suggested as a foundation from which to build a model-oriented GMMS. The incorporation of artificial intelligence capabilities into a GMMS is seen as a second implementation step which require the development of a sufficiently flexible meta-level architecture. Model abstractions are introduced as a vehicle for implementing this architecture.     

基于交通流特性的高速公路交通网络建模与应用

为了满足高速公路安全管理系统的功能需求,提出了一种适合高速公路交通网络数据表达、操作与分析的基于交通流特性的高速公路交通网络数据模型,弥补了现有交通网络GIS数据模型在复杂的网络建模和分析中的不足。在分析高速公路交通流特性的基础上提出了高速公路交通网络的建模要素,并设计了概念建模、逻辑建模和物理建模的方法。该模型有利于迅速响应影响网络交通流分布的突发事件并生成安全管制决策,文中以高速公路网交通封闭实施位置算法为例说明其在高速公路安全管理领域的应用。     

三维虚拟场景建模工具的设计与实现

采用Java和Java3D技术设计并开发了一套虚拟场景建模工具。描述了建模工具的数据结构和数据管理器的运行机制,综述了实现建模工具的技术要点——多视图显示、对象ID管理、视点变换控制等。目前已经完成了该建模工具的开发工作。     

A survey of uncertain data management

Uncertain data are data with uncertainty information,which exist widely in database applications.In recent years,uncertainty in data has brought challenges in almost all database management areas such as data modeling,query representation,query processing,and data mining.There is no doubt that uncertain data management has become a hot research topic in the field of data management.In this study,we explore problems in managing uncertain data,present state-of-the-art solutions,and provide future research directions in this area.The discussed uncertain data management techniques include data modeling,query processing,and data mining in uncertain data in the forms of relational,XML,graph,and stream.     

A structured methodology for implementing engineering data management

One of the most significant positive effects on product and process development in recent years has been the application of data management techniques. Engineering data management or product data management is the most promising one. The implementation of engineering data management is heavily dependent on the engineering process and involves the technologies of management, engineering, and information. However, as there is no commonly acceptable approach and methodologies for implementing engineering data management, it’s implementation becomes a bottleneck.This paper presents a structured methodology for the implementation of engineering data management. The approach consists of a series of steps, from business and engineering process analysis, modeling and reengineering, through system design and modeling, to system realization.This research will facilitate engineering process improvement and the planning, design and implementation of engineering data management. Consequently, it will help increase product development capability and quality, reduce development cycle time and cost, and hence increase product marketability.     

基于Web的工作流表单的柔性建模

针对基于Web的工作流管理系统中表单建模存在的数据结构不合理、维护困难、效率低、缺乏数据柔性和结构柔性等问题,分析了表单数据特点及传统表单建模方法的缺陷,提出一种基于XML和关系数据库的表单柔性建模方法,给出基于表单的流程推动模型及实现方法,引入了数据集控件和自定义函数控件,增强了系统的可扩展性和柔性,满足了工作流管理系统中对表单定义处理灵活性的要求.     

支撑机器学习的数据管理技术综述

应用驱动创新,数据库技术就是在支持主流应用的提质降本增效中发展起来的.从OLTP、OLAP到今天的在线机器学习建模无不如此.机器学习是当前人工智能技术落地的主要途径,通过对数据进行建模而提取知识、实现预测分析.从数据管理的视角对机器学习训练过程进行解构和建模,从数据选择、数据存储、数据存取、自动优化和系统实现等方面,综...     

元数据管理在作战系统数据集成设计中的应用

数据集成是舰艇作战系统体系结构设计的重点之一。为了解决作战系统接口设计存在的问题,提出采用XML数据建模和元数据管理技术的集成设计方法。通过填充型号项目表、二级系统表、上网节点表、接口规格表、信息单元表、数据字段表和数据类型表等7张表构成的接口模板得到数据模型,并开发实现工具软件辅助完成数据建模和元数据管理,从而有效提高作战系统数据集成设计的效率。     

Data Mining of Software Development Databases

Software quality models can predict which modules will have high risk, enabling developers to target enhancement activities to the most problematic modules. However, many find collection of the underlying software product and process metrics a daunting task.Many software development organizations routinely use very large databases for project management, configuration management, and problem reporting which record data on events during development. These large databases can be an unintrusive source of data for software quality modeling. However, multiplied by many releases of a legacy system or a broad product line, the amount of data can overwhelm manual analysis. The field of data mining is developing ways to find valuable bits of information in very large databases. This aptly describes our software quality modeling situation.This paper presents a case study that applied data mining techniques to software quality modeling of a very large legacy telecommunications software system's configuration management and problem reporting databases. The case study illustrates how useful models can be built and applied without interfering with development.     

UML建模技术在医院奖金核算系统中的应用

针对当前医院信息管理系统没有科室奖金核算的缺点,结合医院奖金核算复杂性和特殊性的特点,提出应用UML建模技术设计开发的系统解决方案．本文分析面向对象的UML建模技术,从系统开发过程的视角着重介绍了UML建模技术在需求分析和结构设计层次中的应用,提出了医院奖金核算管理系统开发问题的新思路．根据建模的用例图、活动图和序列图描述出系统设计的构架,用类图反映出数据对象的属性和操作．最终实现一个功能完善,性能可靠的医院奖金核算管理系统．     

施工管理虚拟环境中的CAD识别和三维重构

给出了识别CAD系统设计结果的数据,并在此基础上介绍了进行三维建模的施工管理虚拟环境,提出了有效的基于OpenGL的三维重构解决方案.在该环境中指定各结构构件间、结构构件同其它数据的相关物理及逻辑属性,动态的模拟施工过程,可以实现施工优化控制和相应的资源可视化管理.     

基于主模型的协同设计软件架构技术研究

运载火箭总体方案论证过程中,由于涉及专业多、专业间迭代交互频繁、设计方案多变等特点,容易造成多专业协同设计时版本与技术状态的不统一,需要研究针对运载火箭产品的通用建模方法,并开发相应的软件系统;基于统一数据源的协同设计理念,结合运载火箭总体设计与数据模型特点,通过定义基础信息模型、概念模型、参数模型、外部定义模型4种数据模型,提出了针对运载火箭产品的通用主模型构建方法;将此通用建模方法软件化,搭建了基于主模型的协同设计软件系统整体架构;此架构包含主模型管理系统、主模型建模工具及应用客户端三部分,实现了多专业协同设计过程中数据与版本的统一管理、技术状态一致性分析、谱系追踪、数据展示与应用等功能;该主模型建模工具与客户端软件系统的实现,为运载火箭的总体协同设计提供了工具支撑。     

Threat modeling of a mobile device management system for secure smart work

To enhance the security of mobile devices, enterprises are developing and adopting mobile device management systems. However, if a mobile device management system is exploited, mobile devices and the data they contain will be compromised. Therefore, it is important to perform extensive threat modeling to develop realistic and meaningful security requirements and functionalities. In this paper, we analyze some current threat modeling methodologies, propose a new threat modeling methodology and present all possible threats against a mobile device management system by analyzing and identifying threat agents, assets, and adverse actions. This work will be used for developing security requirements such as a protection profile and design a secure system.     

A survey of modeling for prognosis and health management of industrial equipment

Prognosis and health management plays an important role in the control of costs associated with operating large industrial equipment, such as wind turbines and aircraft. It is only fair that engineers and scientists have vastly researched modeling approaches to support decision making. Motivated by the growing availability of data and computational power as well as the advances in algorithms and methods, modeling frameworks often merge elements of physics, machine learning, and statistical learning. In this paper, we present a review on modeling in support of prognosis and health management of industrial equipment. This survey complements the existing prognosis and health management literature by discussing how modeling strategies are influenced by industry-specific aspects such as maintenance approaches (e.g., reactive, proactive, and predictive), implementation factors (e.g., industry, business model, purpose, development, and deployment), as well as supporting technologies (sensing, repair, and modeling itself). We use the onshore wind energy and civil aviation industries to illustrate how these aforementioned aspects can influence modeling and implementation of prognosis and health management. The literature review is broad and covers contributions over the past 40 years. We close the paper with few topics that can motive research going forward.     

Rational land use decision-making: The natchez state park

Mississippi State University undertook a remote sensing application project to assist the Mississippi Park Commission in selecting a suitable site for a proposed state park in Adams County, Mississippi. Due to political and geographic constraints, a study area of approximately 130,000 acres was selected. High-altitude color infrared imagery of scale 1 : 120,000 was available, and these data, together with inputs from other sources such as topographic and geologic base maps, yielded the basic data for the construction of a computerized data management system. The cell size for data input was 4 ha. Ten possible areas were selected by modeling and visual evaluation, and after the Commission personnel had selected one site, a low altitude flight was made to obtain 1 : 24,000 color infrared imagery. These data in conjunction with map information were used to develop a data management system for more intensive analysis and modeling on a 1-ha grid. The modeling effort indicated those cells which had the highest suitability for individual recreational activities. Master planning efforts for the park incorporate these data.     

产品数据管理系统的用户权限管理

通过对产品数据管理系统的分析，本文探讨了产品数据管理系统中数据、工作流程、活动、操作和角色之间的关系，提出了基于数据、工作流程、活动、操作和角色的用户权限管理的建模方法。通过在某航空企业PDM系统中建立用户权限管理模型的应用，证明了这种方法具有简单、规范、有效等特点，井可广泛应用于其它类型的复杂信息系统中。     

基于PRM的水体富营养化风险分析建模

从信息的知识发现角度出发,提出基于概率关系模型(PRM)的水体富营养化风险分析建模方法。该建模方法利用多关系数据的存储结构和存储内容对数据进行学习与挖掘,构建具有网络拓扑结构的PRM模型。示例分析结果表明,PRM模型易于解释与分析水体中各种影响因素间的相关性,该建模方法可通过分析历史数据发现水体富营养化的潜在风险,为库区水环境管理与水污染防治提供科学依据。     

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.