A strawman reference model in transaction processing for an object-oriented database

This position paper provides a strawman reference model which can be used to compare and reason about transaction management in an Object-Oriented Data Base system (OODB). The model is described as consisting of a collection of characteristics that can be used for comparing existing and future features in transaction management of an OODB. Some of the features in this collection are really alternatives to one another. The purpose of inclusion of these alternatives is to help the evaluation process when developing standards.     

An object-oriented model for FMS control

The flexible manufacturing system (FMS) is a distributed network of heterogeneous programmable manufacturing machinery, such as assembly lines and numerically controlled machines. Despite these interconnected, programmable hardware elements, the success of building a truly flexible manufacturing system has been limited so far, owing to the lack of flexibility in its control software layer. In integrating heterogeneous machinery, many existing FMS control software systems depend structurally on specific machinery and job-scheduling strategies, and thus it is difficult to incorporate new developments in FMS organization and operational requirements. In searching for an open architecture for the FMS control software system, this paper presents an object-oriented FMS data model. Among others, it represents each physical cluster of related machinery (called a flexible manufacturing cell) as an object. To facilitate the integration of heterogeneous physical cells, such cell objects share a common protocol of interacting with the main control process through inheritance from the abstract cell class. Other related physical and abstract entities in FMS are also modelled as objects, with their similarity and difference captured in inheritance hierarchies. To verify the proposed approach experimentally, a prototype FMS control software system named FREE (FMS Runtime Executive Environment) has been implemented on top of a commercial object-oriented database system.     

面向对象的专家知识模型

文中用面向对象方法来分析、设计基于规则的专家系统,提出一种新的采用分层递阶结构的专家知识模型,并从结构和功能角度进行详细阐述。     

关系数据模型与面向对象数据模型的关系探讨

面向对象数据模型的应用打破了油田单一关系数据库体系架构。如何在面向对象数据模型和关系数据模型并存条件下构建和优化协调统一的数据库体系架构,是油田数据库建设的重要技术方向之一。本文从油田数据库应用的角度概要对比了关系数据模型和面向对象数据模型的特点,对关系数据模型和面向对象数据模型共存条件下建立油田数据库体系架构的可能性进行了探讨。     

面向对象的嵌入式GIS空间数据模型设计与实现

利用面向对象技术,将嵌入式GIS系统抽象为元素模型、要素模型、地图表示/表现模型、地理数据计算/分析模型、空间数据压缩/索引模型和Web服务支持模型,讨论分析模型的设计、其间的组织关系、管理方式和实现机制,并对模型的应用和存在的问题进行简要阐述。     

面向对象数字地质图数据模型的研究

本文结合国内外的研究成果,吸收面向对象的思想和方法,利用统一建模语言UML,完成了面向对象数字地质图数据模型的建立。从制图学的角度出发,设计了数字地质图数据的概念模型、逻辑模型,定义了构成数字地质图各要素间的逻辑关系,并简要叙述了物理模型的实现平台和建立过程。面向对象的数字地质图数据模型打破了关系模型范式的限制,更加合理地将空间数据和属性数据有效地融合在一起,为数字地质图的高效存储、管理、分析、应用、可视化表达提供一种科学、合理、可靠、可操作性强的机制和模式,作为一种尝试和探索,具体的设计和实施还有待于进一步研究。     

面向对象的电子政务系统模型研究与设计*

在对电子政务系统模型综述的基础上,提出并构建了面向对象的电子政务系统模型。该模型中将电子政务系统分解为三个对象,即政府、企（事）业单位和公民,建立了面向对象电子政务系统模型中各对象之间直接和间接的互动关系,结合上海社会保障卡应用实例,对面向对象的电子政务系统模型进行了系统分析。通过分析,该模型具有融合性、可扩展性、可管理性等特点,易于扩展、成本低且效率高,对电子政务的研究及实践具有一定的指导意义。     

An enhanced neutral object-oriented data model

A neutral object-oriented data model is necessary to provide separation of application data views from physical data storage in industrial software systems. This short note suggests that a semantically enhanced object data model beyond that of current language-oriented models will be necessary to provide robust capabilities.     

Formalization of object-oriented database model with rules

The paper investigates knowledge representation in an object-oriented database management system first within the data model with rules and second in the computational model by using logic. Issues of structure, integrity, and retrieval are focused on. The proposed system provides object-oriented concepts for describing complex structured data, rules for expressing object-dependent constraints and object associations, and, finally, logic for inference and retrieval.     

移动计算中基于权值的自适应事务处理模型

在综合分析现有事务模型的基础上，提出了一种根据事务提交所处的网络环境和事务是否访问热点数据，自动选择子事务处理模型的基于权值的自适应移动事务处理模型——AMTMBW。实验证明，新的事务处理模型在移动事务的撤销率，移动事务的执行时间等方面与其他模型相比，其性能都有较大的提高。     

面向对象的3级数据模型

GIS（geographicinformationsystem）中的数据可以分为3种类型：几何数据、地理数据和图形显示数据．本文提出的面向对象3级数据模型对这3种数据进行抽象划分，用面向对象的模型描述它们及其之间的关系，并以此作为OOGDB（object－orientedseosraphicdatabase）的数据模型．     

面向对象数据库中数据字典实现的一种方法

面向对象数据库支持复杂的数据类型,语义贴近现实,因而有广泛的应用前景.数据字典是数据库的骨架,因此数据字典的建立至关重要.通过对面向对象数据库和关系数据库中数据字典结构的研究,建立和实现了面向对象数据字典;用十字链表数据结构存储数据字典,并给出了算法.用十字链表的方法存储数据字典结构清晰,插入和查询方便.     

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.     

Algorithmic support for model transformation in object-oriented software development

Current methods for object-oriented software development provide notation for the specification of models, yet do not sufficiently relate the different model types to each other, nor do they provide support for transformations from one model type to another. This makes transformations a manual activity, which increases the risk of inconsistencies among models and may lead to a loss of information. We have developed and implemented an algorithm supporting one of the transitions from analysis to design, the transformation of scenario models into behavior models. This algorithm supports the Unified Modelling Language (UML), mapping the UML's collaboration diagrams into state transition diagrams. We believe that CASE tools implementing such algorithms will be highly beneficial in object-oriented software development. In this paper, we provide an overview of our algorithm and discuss all its major steps. The algorithm is detailed in semi-formal English and illustrated with a number of examples. Furthermore, the algorithm is assessed from different perspectives, such as scope and role in the overall development process, issues in the design of the algorithm, complexity, implementation and experimentation, and related work. Copyright © 2001 John Wiley & Sons, Ltd.     

基于角色网络模型的行政事务处理系统控制器

从政府行政事务处理系统存在的问题出发,首先概要综述了角色网络模型（RNM）,进一步提出了动态数学描述。RNM突出了角色的中心位置,充分满足行政事务处理系统的要求,能够对半结构化和非结构化的业务流程进行控制。最后结合MVC架构模式,提出了基于RNM的行政事务处理系统控制器的工作过程。     

基于赋权交易模型的区块链技术的档案管理研究

为了保障电子档案管理的安全性,基于赋权交易模型的区块链技术对档案管理进行研究。首先建立一个基于区块链技术的框架,具有通用性、易维护性和易搭建性等特点;然后,由于UTXO模型没有解决非确定数值的交易,故针对档案特性对区块链交易中使用的UTXO模型进行改进,提出ET(赋权交易)模型;由于档案管理需要高成本以及高时效性,故采用Fabric的联盟链作为区块生成的方法,以此来降低成本、提高性能。仿真实验结果表明,基于赋权交易模型的区块链技术大大提升了档案管理的稳定性及可用性。     

面向CIMS的工程数据库管理系统

本文叙述了一个面向ＣＩＭＳ的工程数据库管理系统，该系统引入了面向对象的概念和方法，以关系数据库管理系统ＯＲＡＣＬＥ为基础，并与图形软件ＧＫＳ集成，使它具有支持抽象数据类型，类层次和继承性，复杂对象管理。图形数据和非图形数据统一操作，版本管理和长事务处理等能力，文中着重叙述了面向对象的工程数据模型ＯＥＤＭ，系统的体系结构，功能模块和ＯＳＱＬ语言。     

Autonomous objects: A natural model for complex applications

Object-oriented database systems are emerging as the next generation DBMSs for advanced applications, e.g., VLSI design, mechanical CAD/CAM, software engineering, etc. However, a close analysis indicates that the requirements imposed by these application domains cannot be met by an object-oriented model that relies purely onpassive objects. In this work we go beyond the conventionalsingle-thread-of-control paradigm of passive object models and propose a model ofactive objects which can autonomously initiate responses to environmental changes.Autonomous objects cooperate with each other by synchronous orasynchronous message passing—giving rise to themultiple-thread-of-control in such an environment. It is shown howevents—to which active objects react—can be incorporated into this model. We propose a nondeterministic computational model for the individual active objects that allows the autonomous reaction upon events. We show that this very sparse extension to an object-oriented model gives rise to several high-level features which can be controlled by events. The object-oriented paradigm allows one to isolate the rules according to which events are being raised. This leads to a potentially rather efficient execution model compared to existing relational concepts, which are typically globally-defined event trigger mechanisms.     

OOMMS:A Module Management System Based on an Object-Oriented Model

This paper describes the design rationale of OOMMS, a module management system based on an object-oriented model.The concepts of object and module are defined.Modules refer to the software products in general which have interface parts and body pars.Related concepts of a cluster of modules,versions of a module,and revisions of a version are also defined.The tools for checking in Cprogram modules into OOMMS are discussed.