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Searching multimedia information in distributed environment

IEICE TRANSACTIONS ON COMMUNICATIONS 1996年第8期E79B卷 989-998页

作者： Sakai, Y Kataoka, R NIPPON TELEGRAPH & TEL PUBL CORP INFORMAT & COMMUN SYST LABS YOKOSUKA KANAGAWA 23803 JAPAN

In retrieving information from databases widely distributed in a network, the first thing to do is to search and find the database where the required information is stored. We call this the information searches rather than the retrievals. In this paper, we present a search and retrieval method for multimedia information, especially images. First, we formalize the general elements of information search and introduce a new search concept based on entropy reduction. Next, we discuss recent new technologies for image retrieval and introduce a new image retrieval system called Video Reality. Third, we present several methods of searching in the network- for example, the Internet robot TITAN, and a new search method for images distributed in the network that is based on the hierarchical structure of image retrieval. Finally, we discuss the network control and design concepts appropriate for information search and retrieval.

关键词： information search image retrieval distributed database network

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CIMBASE: A Multidatabase Integration Environment

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Tsinghua Science and Technology 1996年第2期1卷 146-152页

作者：王令赤周立柱王国仁郑怀远 Department of Computer Science and Technology Tsinghua Universiry Beijing 100084 Department of Computer Science and Technology Northeast University Shenyang 110080

The integration of heterogeneous multidatabases on a network is one of the key issues to be sofved in thedevelopment of CIMS (computer integrated manufacturing system). As a solution to this issue, a multidatabase integration environment, CIMBASE, has been developed. CIMBASE adopts an object-oriented data model and provides users with a series of software tools: a query language, a pre-compiler, a graphical database schema editor,a graphical query interface and a form based query generation *** paper discusses in detail the major aspectsof CIMBASE: its object-oriented data model, query language interpreter and the design and implementation of itsprc-compiler. The design and algorithms presented in this paper provide a solid foundation for research on multidatabase integration.

关键词： object-oriented database distributed database data model query language pre-compiler CIMS

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distributed database-SYSTEMS IN HIGH-SPEED WIDE-AREA NETWORKS

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IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 1993年第4期11卷 617-630页

作者： BANERJEE, S LI, VOK WANG, CP UNIV CALIF RIVERSIDE DEPT COMP SCIRIVERSIDECA 92521

In a distributed database system (DDBS), the data are partitioned into smaller databases and distributed over multiple sites in a computer network. Associated with a DDBS are functions like query processing and concurrency control. Traditionally in DDBS research, the computer network has been considered a performance bottleneck, and much research effort has been directed towards the design of database operations that minimize the data transmission cost. With the development of high-speed networks, the network transmission costs go down and new algorithms that efficiently utilize the huge bandwidth available are required. In this paper, we first identify the issues involved in developing this distributed application in a high-speed environment. Then we demonstrate the inadequacy of existing database protocols in utilizing the gigabit network. And finally, we develop a new concurrency control protocol that performs better than traditional DDBS in a high-speed network. Both analytical and simulation results are presented. In this paper, we have concentrated on the concurrency control (CC) aspect of DDBS since this protocol is at the heart of the overall functioning of the distributed system.

关键词： .data transmission query processing distributed database database system high-speed networks high-speed environment

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X.500 DIRECTORY SERVICES SUPPORT FOR ELECTRONIC DATA INTERCHANGE (EDI)

COMPUTER NETWORKS AND ISDN SYSTEMS

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COMPUTER NETWORKS AND ISDN SYSTEMS 1995年第5期27卷 691-701页

作者： OMAHONY, D WELDON, N Computer Science Department Trinity College Dublin 2 Ireland

Electronic Data Interchange (EDI) is the means by which companies exchange trade related documents between application processes in electronically processable form. The initial development of this technology has been hampered by a lack of accepted international standards. We outline three key standards-based technologies that can be used to achieve global open EDI. These are the EDIFACT document syntax rules, X.400 message handling systems and X.500 directory services. We discuss in detail how the X.500 Directory can be used as a powerful tool in allowing EDI to take place between companies without the necessity for prior agreement. In addition, we describe a mechanism by which the directory can be used to store product information that may be used by a purchaser in ordering electronically.

关键词： ELECTRONIC DATA INTERCHANGE (EDI) X.500 DIRECTORY SERVICE X.400 MESSAGE HANDLING SERVICE EDIFACT ELECTRONIC PURCHASING TELESHOPPING distributed database STEP PRODUCT DATA

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DESIGN AND IMPLEMENTATION OF HETEROGENEOUS distributed MULTIMEDIA SYSTEM USING MOSAIC GSQL

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SOFTWARE-PRACTICE & EXPERIENCE 1995年第11期25卷 1223-1241页

作者： MAGAVI, S WONG, J BODLA, P Department of Computer Science Iowa State University Ames IA 50011 U.S.A.

With more and more computer users having access to the Internet, it is important for them to access the vast amount of information in an efficient and easy manner. This project explores one of the possibilities for providing an integrated system to the user to access the different types of media like text, image, audio and video stored in different databases on remote machines without the user having to know about the underlying mechanism involved in accessing the database. Such a system must hide the location of the remote data, retrieve the information, process the results and present it to the user. We have used the National Center for Supercomputer Applications (NCSA) Mosaic's Gateway Structured Query Language (GSQL), which enables a system developer to build input forms, query to the remote database in a relatively easy manner and present the results to the user. With the help of this prototype, the development time to build such an application is considerably reduced as compared with developing the same application using the existing Graphical User Interface (GUI) tools like the X-Window system.

关键词： distributed database DATA TRANSPARENCY HETEROGENEOUS distributed database SYSTEM MOSAIC GSQL WORLD WIDE WEB MULTIMEDIA HYPERMEDIA

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Performance evaluation of database concepts for personal communication systems 3rd

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3rd International Conference on Intelligence in Broadband Services and Networks - Bringing Telecommunication Services to the People (IS&N 95)

作者： Ritterbecks, A Lawniczak, D Niebert, N Ericsson Eurolab Deutschland GmbH Ericsson Allee 1 Herzogenrath D-52134 Germany

ISBN: (纸本)3540604790

The purpose of the RACE project Mobilise is the definition and characterisation of future advanced telecommunication services. Within this project, the PSCS (Personal Service Communication Space) service concept has been developed which is based on UPT (Universal Personal Telecommunication) ideas. Special emphasis is put on the user's point of view on telecommunication and the support of personal mobility independent of the involved networks. For the establishment of such a service, the service data and logic has to be accessible from everywhere. However, PSCS does not consider an implementation of a database and leaves this to the underlying telecommunication network. It is the aim of this paper to evaluate how far the database concepts developed for the Universal Mobile Telecommunication System (UMTS) are able to support PSCS1.

关键词： personal communications UPT UMTS personal service communication space distributed database

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A Hypermedia Information System for Quality Monitoring and Diagnosis of a Galvanising Line

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IFAC Proceedings Volumes 1995年第21期28卷 29-34页

作者： E. Gnaedinger S. Roth G. Bloch P. Fatrez Centre de Recherche en Automatique de Nancy - CNRS URA 821 ESSTIN Rue Jean Lamour F-54500 Vandoeuvre France Phone: +33 83 50 33 33 ； Fax: +33 83 54 21 73 SOLLAC Ligne de Galvanisation Sainte Agathe 17 Avenue des Tilleuls F-57191 Florange Cedex France Phone: +33 82 51 54 78 ； Fax: +33 82 51 60 11

This paper is based on a research project between CRAN and a flat steel company. The purpose is to define an Hypermedia Technical Information System (H.T.I.S.) for quality monitoring and diagnosis on a new galvanising line. A methodological approach is proposed to generate the Hyper-document structure with an hypergraph. The H.T.I.S. is carried out using HTML language in order to provide a useful documentation tool.

关键词： information technology multimedia distributed database supervision galvanising line HTML language

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MAKING HETEROGENEOUS MEDICAL databaseS INTEROPERABLE

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COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 1994年第3-4期43卷 275-281页

作者： WILLIAMS, MH HU, J Department of Computing and Electrical Engineering Heriot-Watt University Riccarton Edinburgh EH14 4AS UK

The increasing use of computer systems for storing patient information in different hospitals, in different departments within the same hospital, in clinics and even in doctors' surgeries, is creating a problem in terms of the fragmentation of the patient record. The lack of any coordination or standardization in the way in which data are represented and stored in these different systems makes the task of finding and retrieving data that much more difficult. This paper considers two aspects of this problem and describes an architecture which can be used to overcome them.

关键词： INTEROPERABILITY MULTIdatabase distributed database MEDICAL INFORMATION SYSTEM PATIENT RECORD

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database PLACEMENT IN COMMUNICATION-NETWORKS FOR MINIMIZING THE OVERALL TRANSMISSION COST

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MATHEMATICAL AND COMPUTER MODELLING 1994年第1期19卷 7-19页

作者： LIN, XM ORLOWSKA, ME ZHANG, YC Department of Computer Science The University of Queensland St. Lucia QLD 4072 Australia

The minimum spanning tree write PolicY for the maintenance of the consistency of a distributed database, where replicated data exist, has been proposed in [1]. In this paper, we first present a data placement heuristic algorithm in general networks for minimizing the overall transmission cost for processing the typical demands of queries (by a 'simple'' process strategy) and updates (by the minimum spanning tree write policy). Several interesting optimality estimation results of this algorithm are shown, while the computational intractability of the complete optimization, with respect to the simple strategy, is shown as well. Secondly, we apply a classical climbing hill technique to obtain a dynamic database placement algorithm based on an employed optimizer-a collection of distributed query process algorithms. This is guaranteed to output a ''locally optimal'' data allocation. The implementation results also show that those two heuristics work well in practice.

关键词： COMMUNICATION COST DATA PLACEMENT distributed database NETWORK OPTIMIZATION

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An environment for integrated development and evaluation of real-time distributed database systems

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Journal of Systems Integration 1992年第1期2卷 67-90页

作者： Son, Sang H. Department of Computer Science University of Virginia Charlottesville 22903 VA United States

Real-time database systems must maintain consistency while minimizing the number of transactions that miss the deadline. To satisfy both the consistency and real-time constraints, there is the need to integrate synchronization protocols with real-time priority scheduling protocols. One of the reasons for the difficulty in developing and evaluating database synchronization techniques is that it takes a long time to develop a system, and evaluation is complicated because it involves a large number of system parameters that may change dynamically. This paper describes an environment for investigating distributed real-time database systems. The environment is based on a concurrent programming kernel that supports the creation, blocking, and termination of processes, as well as scheduling and interprocess communication. The contribution of the paper is the introduction of a new approach to system development that utilizes a module library of reusable components to satisfy three major goals: modularity, flexibility, and extensibility. In addition, experiments for real-time concurrency control techniques are presented to illustrate the effectiveness of the environment. © 1992 Kluwer Academic Publishers.

关键词： distributed database prototyping real-time synchronization transaction

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