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检索条件"主题词=Object-oriented databases"

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MOCache: A Cache Management Tool for Moving object databases 28th

MOCache: A Cache Management Tool for Moving Object Database...

引用

28th International Conference on Database Systems for Advanced Applications, DASFAA 2023

作者： Wu, Bingya Jin, Xin Xu, Jianqiu College of Computer Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing China

ISBN: (纸本)9783031306778

There is a lack of cache management in moving object databases which is essentially important for system analysis. In addition, users focus on queries in real scenarios, but cache replacement strategy is not customized. To address these issues, we develop a cache management tool called MOCache for moving object databases. The tool consists of three components: data partition, cache strategy improvement and cache status monitoring. First, we partition moving objects and 3D bbox to establish mapping relationships between sub trips and cells. Then, we propose a cache elimination strategy based on cell heat for the purpose of exploiting spatio-temporal attributes. Finally, the tool visualizes cache status and automatically generates warm-up commands. Demonstration shows that the tool achieves hit ratio to 76.56% and greatly reduces execution time compared with alternative approaches, and helps researchers evaluate factors affecting database cache. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： object-oriented databases

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Teallach: A model-based user interface development environment for object databases

Teallach: A model-based user interface development environme...

引用

1999 User Interfaces to Data Intensive Systems, UIDIS 1999

作者： Griffiths, Tony Barclay, Peter J. McKirdy, Jo Paton, Norman W. Gray, Philip D. Kennedy, Jessie Cooper, Richard Goble, Carole A. West, Adrian Smyth, Michael Department of Computer Science University of Manchester Oxford Road ManchesterM139PL United Kingdom Department of Computing Studies Napier University 42 Craiglockhart Avenue EdinburghEH141LT United Kingdom Department of Computing Science University of Glasgow GlasgowG128QQ United Kingdom

ISBN: (纸本)0769502628

Model-based user interface development environments show promise for improving the productivity of user interface developers, and possibly for improving the quality of developed interfaces. However, model-based techniques have rarely been applied to the important area of database interfaces. This lack of experience with data intensive systems may have led to model-based projects failing to support certain requirements that are essential in data intensive applications, and has prevented database interface developers from benefiting from model-based techniques. This paper presents a model-based user interface development environment for object databases, describing the models it supports, the relationships between these models, and the tool used to construct interfaces using the models.

关键词： object-oriented databases

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Extending OLAP Querying To External object databases 00

Extending OLAP Querying To External Object Databases

引用

9th International Conference on Information and Knowledge Management (CIKM 2000)

作者： Pedersen, Torben Bach Shoshani, Arie Gu, Junmin Jensen, Christian S. Department of Computer Science Aalborg University Denmark Lawrence Berkeley National Laboratory United States

ISBN: (纸本)9781581133202

On-Line Analytical Processing (OLAP) systems based on a multidimensional view of data have found widespread use in business applications and are being used increasingly in non-standard applications. These systems provide good performance and ease-of-use. However, the complex structures and relationships inherent in data in non-standard applications are not accommodated well by OLAP systems. In contrast, object database systems are built to handle such complexity, but do not support OLAP-type querying well. This paper presents the concepts and techniques underlying a flexible, "multi-model" federated system that enables OLAP users to exploit simultaneously the features of OLAP and object database systems. The system allows data to be handled using the most appropriate data model and technology: OLAP systems for multidimensional data and object database systems for more complex, general data. Additionally, physical data integration can be avoided. As a vehicle for demonstrating the capabilities of the system, a prototypical OLAP language is defined and extended to naturally support queries that involve data in object databases. The language permits selection criteria that reference object data, queries that return combinations of OLAP and object data, and queries that group multidimensional data according to object data. The system is designed to be aggregation-safe, in the sense that it exploits the aggregation semantics of the data to prevent incorrect or meaningless query results. A prototype implementation of the system is reported. © ACM 2000.

关键词： object-oriented databases

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A neurofuzzy approach to active learning based annotation propagation for 3D object databases

A neurofuzzy approach to active learning based annotation pr...

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1st Eurographics Workshop on 3D object Retrieval, EG 3DOR 2008

作者： Lazaridis, Michalis Daras, Petros Centre for Research and Technology Hellas Informatics and Telematics Institute PO BOX 60361 Thessaloniki GR 57001 Greece

ISBN: (纸本)9783905674057

Most existing Content-based Information Retrieval (CBIR) systems using semantic annotation, either annotate all the objects in a database (full annotation) or a manually selected subset (partial annotation) in order to increase the system's performance. As databases become larger, the manual effort needed for full annotation becomes un-affordable. In this paper, a fully automatic framework for partial annotation and annotation propagation, applied to 3D content, is presented. A part of the available 3D objects is automatically selected for manually annotation, based on their "information content". For the non-annotated objects, the annotation is automatically propagated using a neurofuzzy model, which is trained during the manual annotation process and takes into account the information hidden into the already annotated objects. Experimental results show that the proposed method is effective, fast and robust to outliers. The framework can be seen as another step towards bridging the semantic gap between low-level geometric characteristics (content) and intuitive semantics (context). © The Eurographics Association 2008.

关键词： object-oriented databases

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Flattening the metamodel for object databases

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6th East European Conference on Advances in databases and Information Systems, ADBIS 2002

作者： Habela, Piotr Roantree, Mark Subieta, Kazimierz Polish-Japanese Institute of Information Technology Warsaw Poland School of Computer Applications Dublin City University Dublin Ireland Institute of Computer Science PAS Warsaw Poland

ISBN: (纸本)3540441387

A metamodel definition presents some important issues in the construction of an object database management system, whose rich data model inevitably increases the metamodel complexity. The required features of an object database metamodel are investigated. Roles of a metamodel in an object-oriented database management system are presented and compared to the proposal defined in the ODMG standard of object-oriented database management systems. After outlining the metamodel definition included in the standard, its main drawbacks are identified and several changes to the ODMG metamodel definition are suggested. The biggest conceptual change concerns flattening the metamodel to reduce complexity and to support extendibility. © Springer-Verlag Berlin Heidelberg 2002. All rights reserved.

关键词： object-oriented databases

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A Meta Model and an Infrastructure for the Non-Transparent Replication of object databases 00

A Meta Model and an Infrastructure for the Non-Transparent R...

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9th International Conference on Information and Knowledge Management (CIKM 2000)

作者： Dreyer, Werner Dittrich, Klaus R. Microsoft Corp. United States Database Technology Research Group Department of Information Technology University of Zurich Switzerland

ISBN: (纸本)9781581133202

The distribution of data within or between organizations is crucial for many applications. Such a distribution may be transparent, as it is embodied in distributed database systems to increase their performance, reliability and availability. Other systems either do not require transparent data distribution or even explicitly need their own copies of the data. Examples are data warehouses which collect base data from different transaction processing systems, or financial data distribution systems in banking where data are bought from external providers and distributed to different working groups. Such systems need non-transparent, partial and selective replication of databases. If object databases are used, appropriate replication systems have to cope with the additional complexity of object models. TodayÕs replication systems do not meet these requirements. Consequently, we introduce a meta model that specifies the abstract functionality which is needed for the non-transparent, partial and selective replication of object databases. This meta model allows incorporation of its replication concepts in a variety of object models. In addition, we present the design of a replication infrastructure, based on the meta model, which serves as the foundation for concrete realizations of object replication systems. The development of a replication system for a time series database management system proved the viability of the proposed solution. © ACM 2000.

关键词： object-oriented databases

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Preserving object-relational databases for the next generations

Preserving object-relational databases for the next generati...

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2010 5th International Conference on Digital Information Management, ICDIM 2010

作者： Viktor, Herna L. Wang, Bo Paquet, Eric Doyle, Julie School of IT and Engineering University of Ottawa Ottawa ON Canada National Research Council of Canada Ottawa ON Canada School of Computer Science and Informatics University College Dublin Ireland

ISBN: (纸本)9781424475728

Increasingly, resources are "born digital" and their associated formats are short-lived. Subsequently, the development of environments to preserve such digital content over the very long-term (50 years or more) has become a critical issue. To date, however, the preservation of data as contained in object-relational databases has been widely overlooked. Here, the task is inherently complicated by the nature of the data (relational as well as multimedia). Furthermore, the internal structure of the database and the associated applications need to be preserved as it evolves over time. This paper presents an environment to preserve object-relational databases over a very long period of time. We show that our environment is able to host and access multiple databases as they evolve over time. ©2010 IEEE.

关键词： database structure digital content digital libraries multiple databases object-oriented databases object-relational databases relational databases

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OLAP++: Powerful and easy-to-use federations of olap and object databases

OLAP++: Powerful and easy-to-use federations of olap and obj...

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26th International Conference on Very Large Data Bases, VLDB 2000

作者： Gu, Junmin Pedersen, Torben Bach Shoshani, Arie Lawrence Berkeley National Laboratory Berkeley CA 94720 United States Department of Computer Science Aalborg University 9220 Aalborg Denmark

We describe the OLAP++ system for federating OLAP and object databases. The system allows users to easily pose OLAP queries that reference external object databases. This enables very flexible and fast integration of ... 详细信息

ISBN: (纸本)1558607153

关键词： object-oriented databases

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A query calculus for spatio-temporal object databases

A query calculus for spatio-temporal object databases

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8th International Symposium on Temporal Representation and Reasoning, TIME 2001

作者： Griffiths, Tony Fernandes, Alvaro A.A. Djafri, Nassima Paton, Norman W. Department of Computer Science University of Manchester Oxford Road Manchester M13 9PL United Kingdom

ISBN: (纸本)0769511074

The development of any comprehensive proposal for spatio-temporal databases involves significant extensions to many aspects of a non-spatio-temporal architecture. One aspect that has received less attention than most is the development of a query calculus that can be used to provide a semantics for spatio-temporal queries and underpin an effective query optimization and evaluation framework. We show how a query calculus for spatio-temporal object databases that builds upon the monoid calculus proposed by Fegaras and Maier (2000) for ODMG-compliant database systems can be developed. The paper shows how an extension of the ODMG type system with spatial and temporal types can be accommodated into the monoid approach. It uses several queries over historical (possibly spatial) data to illustrate how, by mapping them into monoid comprehensions, the way is open for the application of a logical optimizer based on the normalization algorithm proposed by Fegaras and Maier. © 2001 IEEE.

关键词： object-oriented databases

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A framework for temporal object databases 1st

引用

1st International Conference on Information and Knowledge Management, CIKM 1992

作者： Pissinou, Niki Makki, Kin National Supercomputing Center For Energy And The Environment University of Nevada Las VegasNV89154 United States Department of Computer Science University of Nevada Las VegasNV89154 United States

ISBN: (纸本)9783540574194

The 3 Dimensional Information Space (3DIS) is a rich, extensible, object database model for information management. Here, we concentrate on extending the 3DIS to incorporate the semantics of time, and to support temporal data and the temporal evolution of data. We present a unique approach towards the synthesis of an integrated 3DIS model that supports the temporal aspects of data modeling in addition to the structural and dynamic ones, while preserving its original three dimensional geometric space features. This research presents a step towards defining the concepts and techniques for incorporating time in object databases, and provides a concrete experimental framework for demonstration thereof. © 1993, Springer Verlag. All rights reserved.

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