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COMPUTER 2002年第5期35卷 28-+页

作者： Blaha, M Smith, C OMT Associates Chesterfield MO USA Informat Resources Inc Chicago IL 60661 USA

Builders of database applications focus on using data structure models to facilitate storing and retrieving data. Using abstractions can enhance their understanding of these structures as well as their ability to subsequently manipulate data in the actual database application. One such pattern the authors have repeatedly found useful nominally expresses softcoded values as a data model, but also involves object-oriented concepts and application-specific constraints and behavior. An equipment example describes an application of this pattern in industry.

关键词： object oriented modeling Application software Manufacturing Data models object oriented databases Unified modeling language Taxonomy Computer applications Industrial plants Software systems

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KRYPTON - A FUNCTIONAL-APPROACH TO KNOWLEDGE REPRESENTATION

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COMPUTER 1983年第10期16卷 67-73页

作者： BRACHMAN, RJ FIKES, RE LEVESQUE, HJ XEROX CORP PALO ALTO RES CTRPALO ALTOCA 94304

First Page of the Article

关键词： Knowledge representation Taxonomy Laboratories Artificial intelligence Data structures Application software Computer science object oriented databases object oriented programming Filling

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A DATABASE HANDLER (DBH) FOR BROAD-BAND NETWORK ADMINISTRATION

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COMPUTER COMMUNICATIONS 1994年第2期17卷 103-118页

作者： PATEL, A GARDINER, P UNIV COLL DUBLIN DEPT COMP SCICOMP NETWORKS & DISTRIBUTED SYST RES GRPDUBLIN 4DUBLINIRELAND

Technical and regulatory developments are combining to revolutionize the telecommunications environment. Numerous competing service providers can be expected to enter the market over the next few years. Within this context, cooperation between the management systems of the public network provider and those of the new service providers will be essential. Telecommunications administrations use a wide variety of database (DB) systems to hold network management information, ranging from fairly primitive data stores for bulk information to the industry standard relational databases. Much current research in DB technology concentrates on tackling some of the deficiencies in the relational approach. object oriented databases (OODB), for example, are designed to be better at representing and manipulating complex data. It can be expected that applications for OODBs in the telecommunications area will be found in the near future. Thus in the interim, a strategy is needed which will enable management systems to exchange data even if the DB technology used by each of the participating databases differs. This paper introduces the concept of a Database Handler (DBH) which embodies this strategy. The design of a prototype DBH is presented. The DBH is similar to other systems for handling multiple databases such as distributed databases, multidatabases and federated databases. Its principal distinguishing characteristics are the level of autonomy which it grants to participating databases and the powerful facilities it has for resolving areas of heterogeneity.

关键词： MULTIPLE DATABASE SYSTEMS DISTRIBUTED databases AUTONOMY object oriented databases NETWORK ADMINISTRATION BROAD-BAND COMMUNICATIONS

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Schema evolution in object databases by catalogs

Schema evolution in object databases by catalogs

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International Symposium on Database Engineering and Applications (IDEAS)

作者： A. Pons R.K. Keller Département dE28099lnfomzatique Université du Québec Montreal Montreal QUE Canada Département dE28099lnformatique et de Recherche Opérationnelle Université de Montreal Montreal QUE Canada

We are concerned with schema evolution in object oriented databases (OODB) that is processed by a modification of the classes of the schema. We present a new categorization of the different modifications in three categories: primitive, composite and complex modifications. On this basis, we propose a method by decomposition for addressing conceptual schema evolution: "real-life" complex schema modifications are solved by decomposition into simpler well known and controlled modifications, called composites, which in turn may be reduced to so-called primitives. A key step in making this approach practical, is the provision of two catalogs: one for the primitives based on a sound object model and one for the composites built on top of the primitive catalog. Such catalogs raise the level of abstraction, further reuse and are prerequisites for effective tool support. We define the three types of schema modifications, describe these catalogs, put them into the context of our decomposition approach and provide a process for schema evolution.

关键词： Catalogs object oriented databases Electronic mail object oriented modeling Computer aided manufacturing CADCAM Councils Automation

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The control and the command of the Vivitron, a system managed with an OODBMS

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IEEE TRANSACTIONS ON NUCLEAR SCIENCE 1998年第4期45卷 2020-2025页

作者： Bauman, R Diaz, T Jbil, A Kapps, E Knaebel, R Marsaudon, JC Michel, L Persigny, J Prevot, G Stamm, Y Inst Rech Subatom F-67037 Strasbourg 02 France

The architecture of the control system of the Vivitron is distributed. Thirteen VME crates, equipped with MC68040 boards, working at a potential from 0 to 20 MV, concentrate the measurements and the commands. These concentrators and the control room are federated in a private optical Ethernet network. The intelligence of the system is shared between the concentrators. 4 workstations inside the control room are strictly dedicated to the animation of the graphical user interface, managed with SL-GMS. The mechanisms of communication are only based on industrial standards. The whole system is described in an object oriented data base. Each element, hardware device or software module, is represented in the database by numerical values such as addresses, calibrations or thresholds and a specific C function describing its behavior. The data base generates automatically the code exclusively from this description.

关键词： Control systems object oriented databases Communication system control Optical control Optical fiber networks Ethernet networks Intelligent systems Workstations Animation Graphical user interfaces

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EXPLOITING DATABASE TECHNOLOGY IN THE MEDICAL ARENA

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IEEE ENGINEERING IN MEDICINE AND BIOLOGY MAGAZINE 1992年第1期11卷 42-49页

作者： ALLEN, L FRIEDER, O GEORGE MASON UNIV DEPT COMP SCIFAIRFAXVA 22030 AT&T BELL LABS CONSUMER COMMUNSERV BUSINESS UNITMURRAY HILLNJ 07974

Picture archiving and communications systems (PACS) and the complications of database design and communications constraints are described. Both relational and object-oriented database approaches are examined, as are the centralized and distributed approaches. Data retrieval techniques, image compression, storage media and communication are discussed.< >

关键词： Image databases object oriented databases Relational databases Picture archiving and communication systems Image storage Biomedical imaging Distributed databases Information retrieval Image retrieval Image coding

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GUIDING SCHEMA INTEGRATION BY BEHAVIORAL INFORMATION

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INFORMATION SYSTEMS 1995年第4期20卷 305-316页

作者： THIEME, C SIEBES, A CWI P.O. Box 94079 1090 GB Amsterdam The Netherlands

This paper presents an approach to schema integration, where schemas are restructured using schema transformations and schemas are merged using join operators. The novelty of the approach is that behavioural informati... 详细信息

关键词： SCHEMA INTEGRATION BEHAVIOR object oriented databases

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object-oriented ONLINE NETWORK ANALYSIS

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IEEE TRANSACTIONS ON POWER SYSTEMS 1995年第1期10卷 125-132页

作者： FOLEY, M BOSE, A WASHINGTON STATE UNIV PULLMANWA

object-oriented programming has gained widespread acceptance, as its advantages of flexibility and ease of maintenance have been recognized. In power systems analysis, its use in developing graphical user interfaces and database managers have become quite popular. object-oriented numerical applications, however, poses an interesting problem because solution algorithms often require the manipulation of abstract mathematical objects that may not have physical interpretations (e.g., elements of a factorized matrix), and moreover, may be specific to the numerical algorithm used. This paper presents a method for on-line network analysis using only physically based objects, the same ones that are routinely used in database and user interface applications. It is shown that network analysis, specifically topology processing and power flow, is feasible using message passing between physical objects but some compromise in computation speed is needed to achieve it.

关键词： Power system management object oriented programming Power system analysis computing Graphical user interfaces object oriented databases Energy management User interfaces Network topology Load flow Message passing

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Minerva: Proactive Disk Scheduling for QoS in Multitier, Multitenant Cloud Environments

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IEEE INTERNET COMPUTING 2016年第3期20卷 19-27页

作者： Malensek, Matthew Pallickara, Sangmi Pallickara, Shrideep Colorado State Univ Dept Comp Sci Ft Collins CO 80523 USA

In recent years, the cloud has emerged as a cost-effective and scalable solution to infrastructure requirements for computing and storage resources. However, while the availability of multicore CPUs, high-capacity memory modules, and virtualization technologies has increased the density of converged infrastructure, disk I/O has remained a substantial performance bottleneck. Here, the authors investigate how proactive disk scheduling, backed by predictive models and client-side coordination, can influence the overall throughput and responsiveness of a cluster in data-intensive computing environments. They evaluate their framework with a representative MapReduce job on a 1,200-virtual-machine cluster, demonstrating a 21 percent improvement in completion time.

关键词： Servers Processor Scheduling Cloud Computing Throughput Storage Automation Interconnections Distributed Processing Task Scheduling object oriented databases Performance Attributes Internet Web Technologies Scheduling And Task Partitioning Distributed Architectures

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The OKS persistent in-memory object manager

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IEEE TRANSACTIONS ON NUCLEAR SCIENCE 1998年第4期45卷 1958-1964页

作者： Jones, R Mapelli, L Ryabov, Y Soloviev, I CERN European Lab Particle Phys CH-1211 Geneva 23 Switzerland Petersburg Nucl Phys Inst Gatchina 188350 Leningrad Distr Russia

The OKS (object Kernel Support) is a library to support a simple, active persistent in-memory object manager. II is suitable for applications which need to create persistent structured information with fast access but do not require full database functionality. It can be used as the frame of configuration databases and real-time object managers for Data Acquisition and Detector Control Systems in such fields as setup, diagnostics and general configuration description. OKS is based on an object model that supports objects, classes, associations, methods, inheritance, polymorphism, object identifiers, composite objects, integrity constraints, schema evolution, data migration and active notification. OKS stores the class definitions and their instances in portable ASCII files. It provides query facilities, including indices support. The OKS has a C++ API (Application Program Interface) and includes Motif based CUI applications to design class schema and to manipulate objects. OKS has been developed on top of the Rogue Wave Tools.h++ C++ class library [1].

关键词： Data acquisition Prototypes Relational databases object oriented modeling Distributed databases object oriented databases Nuclear physics Libraries Real time systems Knowledge management

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