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1.
陶伟  麦中凡 《计算机学报》1997,20(6):525-532
多媒体智能数据库系统MIDS(MultimediaIntelligentDatabaseSystem)的存储系统是一个强大的,高性能的对象存储系统,该存储系统是MIDS引擎的核心,它是基于虚存映身的存储系统,在Client/Server的体系结构下,为数据库提供了大容量,复杂的,共享的,多革体数据存取,然而又不失面的对象数据模型的种种优点,在本文中,我们将介绍基于虚存映射的对象存储系统的基本原理以  相似文献   

2.
多级关联离散型系统的生产优化调度   总被引:1,自引:0,他引:1  
周金荣  蒋慰孙 《控制与决策》1992,7(2):88-93,159
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3.
MIDS/BUAA存储管理子系统的设计   总被引:1,自引:1,他引:0  
存储管理(特别是辅存管理)是任何一个数据库系统的物理实现层,持久性若不最终落实到辅存上,就是一句空话.本文首先讨论了将程序设计语言和持久对象进行集成的3种途径;然后介绍了MIDS存储管理子系统SMS(StorageManagementSubsystem)的设计:(1)SMS的体系结构,(2)MIDS对象的存储结构,(3)对象标识的设计,(4)簇聚与索引,(5)持久性的实现,(6)动态地址转换.  相似文献   

4.
多媒体智能数据库系统MIDS/BUAA的总体设计   总被引:1,自引:0,他引:1  
1.引言近二十年内,传统数据库(特别是RDB)技术获得了极大发展和广泛应用。但是,自八十年代以来,随着硬件造价的持续下降,人们对数据库提出了更多和更高的需(要)求,促  相似文献   

5.
The trend in healthcare information technology is increasingly digital and multimedia oriented. The next generation of health care information systems will consist of a vast network of heterogeneous, autonomous, and distributed imaging scanners, databases, information systems, knowledge intensive applications, and large quantities of multimedia medical data. A key challenge facing system researchers and builders is to provide a new organizational framework that can integrate this varied collection of resources into what appears to be a uniform and logical conglomeration of data and knowledge store in order to increase the availability of global or previously nonaccessible information and to address demanding new information processing requirements for diverse image-assisted medical applications. The purpose of this paper is to present the authors' research toward the development of a hospital integrated framework of multimodality image base management (MIBM) for digital radiology of the future. This evolutionary framework consists of three hierarchical components: a hospital-integrated picture archiving and communication system (HI-PACS), a medical image database system (MIDS), and a set of image-based medical applications that relies on the support of MIDS and PACS. In this paper, the authors describe the system architecture, guiding principles, and design specifications of HI-PACS and MIDS and illustrate their functions and capabilities with three implemented applications, namely, patient folder workflow, distributed object management, and multimodality imaging studies. In addition, the authors conclude their findings with a summary of challenges and research directions  相似文献   

6.
Although manufacturing information and data systems (MIDS) form an integral part of a manufacturing organization's infrastructure, the growth of corporate IT expenditure has left many companies questioning the value of their MIDS deployment. The use of traditional appraisal techniques to justify investments in MIDS typically relies on measures based on direct cost savings and incremental future cash flows. These techniques are considered no longer appropriate because of the largely intangible cost and benefit dimensions of many IT projects. This paper presents the results of a research study based on interviews in eighteen manufacturing companies, which investigated the methods used to assess the value and cost of MIDS investments. After showing that the concepts used to justify value vary significantly between respondents, the research indicates that intuition plays an important role in value prediction and assessment. A comparison between small and large companies indicates that the systems implementations are perceived in a better light in smaller companies. The results obtained are then compared with recent research.  相似文献   

7.
多媒体智能数据库系统是一个对象数据库管理系统。体系结构的选择对它的性能和功能有非常重要的影响。在体系结构的选择过程中我们始终遵循这样的一条准则:性能更为重要,因为功能可以在ODBMS的上层的应用程序中增加,而性能上的缺陷是不可能在应用程序层次上得以弥补的。本文讨论和比较了ODBMS的若干体系结构及其实现方案,最后给出了一个有较高性能MIDS体系结构方案。  相似文献   

8.
本文是<<MIDS/BUAA中的模式演进>>一文的续篇,文中描述了MIDS/BUAA模式演进操作的语义,探讨了模式的变化传播对实例及方法(和应用)的影响,论述了演进操作的完全性和有效性,阐述了MIDS/BUAA模式演进的实现途径。  相似文献   

9.
基于JAVA的业务规则管理系统设计和开发   总被引:2,自引:0,他引:2  
介绍了业务规则管理系统的概念,建立了业务规则管理系统模型,对业务规则管理系统所涉及的规则文件、业务数据对象、规则定制器、规则引擎和在线管理的技术作了深入讨论。在此模型的基础上使用JAVA语言开发了一个业务规则管理系统VRules。  相似文献   

10.
MIDS/BUAA的模式管理器与对象管理器的设计   总被引:3,自引:1,他引:2  
本文首先回顾了MIDS/BUAA总体设计中相关的部分重要内容,univObject对象定义,持久性规则、库模式和MIDS的功能构成等。然后重点介绍了MIDS/BUAA中两个核心模块;模式管理器SM和对象管理器OM的思想,基本任务和实现途径;最后给出了MIDS/BUAA类库的层次结构。  相似文献   

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