The Experts below are selected from a list of 29655 Experts worldwide ranked by ideXlab platform

Walter Sujansky - One of the best experts on this subject based on the ideXlab platform.

  • Heterogeneous Database Integration in Biomedicine
    Journal of Biomedical Informatics, 2001
    Co-Authors: Walter Sujansky
    Abstract:

    The rapid expansion of biomedical knowledge, reduction in computing costs, and spread of internet access have created an ocean of electronic data. The decentralized nature of our scientific community and healthcare system, however, has resulted in a patchwork of diverse, or Heterogeneous, Database implementations, making access to and aggregation of data across Databases very difficult. The Database heterogeneity problem applies equally to clinical data describing individual patients and biological data characterizing our genome. Specifically, Databases are highly Heterogeneous with respect to the data models they employ, the data schemas they specify, the query languages they support, and the terminologies they recognize. Heterogeneous Database systems attempt to unify disparate Databases by providing uniform conceptual schemas that resolve representational heterogeneities, and by providing querying capabilities that aggregate and integrate distributed data. Research in this area has applied a variety of Database and knowledge-based techniques, including semantic data modeling, ontology definition, query translation, query optimization, and terminology mapping. Existing systems have addressed Heterogeneous Database integration in the realms of molecular biology, hospital information systems, and application portability.

Zhen You Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Dynamic Integration System for Heterogeneous Database Based on S2SH
    Advanced Materials Research, 2013
    Co-Authors: Zhen You Zhang, Zi Qi Zhao, Zhi Cao
    Abstract:

    Between each node Database there must be different in the distributed Heterogeneous Database system, so how to resolve these different (It's said that realize the mutual transformation between Heterogeneous Databases) was an basic problem in the Heterogeneous Database system. This paper analyzes the system structure and the conversion mechanism for the distributed Heterogeneous Database and the realization of the conversion module theoretical including the conversion information extraction module, structural conversion module, structure formation module and put forward a concrete realization solutions.

  • Synchronous Optimization Method for Heterogeneous Database Based on the Minimal Data Set
    Advanced Materials Research, 2013
    Co-Authors: Zhen You Zhang, Dong Guang Wang, Zhi Cao
    Abstract:

    The data synchronous of the distributed Heterogeneous Database was one of the important researches for the Heterogeneous Databases. This paper analyzed the data synchronization optimization mechanism of the distributed Heterogeneous Database and puts forward to get the minimum change data set from each node Database and then get the system total change data set, and then find out each node Database of minimal update data set to update each node Database, so as to realize the synchronization of Heterogeneous Database.

  • CSEE (5) - Research of the Distributed Heterogeneous Database Conversion Mechanism
    Advances in Computer Science Environment Ecoinformatics and Education, 2011
    Co-Authors: Zhen You Zhang, Weili Wang, Rui Zhang
    Abstract:

    Between each node Database there must be all different in the distributed Heterogeneous Database, so how to resolve these differences (It’s said that realize the mutual transformation between Heterogeneous Databases) was an basic problem in the Heterogeneous Database integration, synchronous and optimized. This paper analyzes the conversion mechanism for the distributed Heterogeneous Database between node Databases and the realization of the conversion module theoretical includeing the conversion information extraction module, structural conversion module, structure formation module and put forward a concrete realization solutions.

  • CSEE (5) - Research in Synchronization Optimization of the Distributed Heterogeneous Database Data
    Advances in Computer Science Environment Ecoinformatics and Education, 2011
    Co-Authors: Zhen You Zhang, Lihong Liu, Rui Zhang
    Abstract:

    The data synchronous of the distributed Heterogeneous Database was one of the important research for the Heterogeneous Databases. So, the research for improving the efficiency of data synchronization of the Heterogeneous Database had an important meaning. This paper analysied the data synchronization optimization mechanism of the distributed Heterogeneous Database and realized the theoretical of the data synchronization, and put forward a concrete realization solutions.

  • Research and implementation for data synchronization of Heterogeneous Databases
    2010 International Conference on Computer and Communication Technologies in Agriculture Engineering, 2010
    Co-Authors: Zhen You Zhang
    Abstract:

    Aiming at enterprises of different types of Heterogeneous Database system of joint use and requirement of data in Heterogeneous Database synchronization problems, the system design and implementation of a context in the Internet, and in SQL Server 2000, Oracle, My SQL Database data synchronization of Heterogeneous Databases with information processing systems. This article describes the actual workflow of the system, introduced the system architecture and implementation of the architecture used to the MVC, Struts2 knowledge, and its core modules of the implementation details are analyzed theoretically.

Zhang Zhenyou - One of the best experts on this subject based on the ideXlab platform.

  • Research Synchronization Mechanism for Distributed Heterogeneous Database
    2012 Fourth International Conference on Computational and Information Sciences, 2012
    Co-Authors: Zhang Zhenyou, Liu Shu
    Abstract:

    For the Heterogeneous Database in different physical, it was a key problem how to guarantee the user data synchronization Heterogeneous Database. This paper analyzed data synchronization system for the distributed Heterogeneous Database, the extracting module, data integration module, data update module and put forward a concrete solution.

  • Research of Distributed Heterogeneous Database Based on S2SH and EJB Components
    2012 Fourth International Conference on Computational and Information Sciences, 2012
    Co-Authors: Zhang Zhenyou, Zhang Baoyin, Liu Shu
    Abstract:

    In order to operate the distributed Heterogeneous Database with several different physical, the basic problem must be solved was system integration of the various Heterogeneous Database system. This paper describes the system integration schemes using S2SH(struts2 spring hibernate) and EJB (Enterprise Java Bean)components based on the B/S architecture of distributed Heterogeneous Database , the core content analysis for its data management, user data table information query and data table unification.

  • Research on the integration and query optimization for the distributed Heterogeneous Database
    Proceedings of 2011 International Conference on Computer Science and Network Technology, 2011
    Co-Authors: Zhang Zhenyou, Liu Shu, Jingjing Zhang, Cao Zhi
    Abstract:

    Heterogeneous Database query optimization should study not only the node Database integrated in different Database, but also to solve the strategy problem which the data query optimization. In this paper, it studied integration among the node Database in the distributed Heterogeneous Database system and the query strategy for the data in Heterogeneous Databases. It was put forward the Database of integration solutions based on Hibernate and query optimization strategy that used the tiny user inquires the response time, and for this scheme design in this concrete solution.

  • Research and implementation the system integration on distributed Heterogeneous Database based on the Hibernate
    Proceedings of 2011 International Conference on Computer Science and Network Technology, 2011
    Co-Authors: Zhang Zhenyou, Gu Wei, Cao Zhi
    Abstract:

    The distributed Heterogeneous Databases have many different physical positions, if all kinds of operation were done, the basic problems must be to solve was the system integration in various Heterogeneous Database. In this paper, it describes the system integration schemes on the Hibernate technology of B/S structure of the distributed Heterogeneous Database, and analyzed the core content of the data source management, the user data table query and data table information for the reunification and etc.

A R Hurson - One of the best experts on this subject based on the ideXlab platform.

  • transaction processing in mobile Heterogeneous Database systems
    IEEE Transactions on Knowledge and Data Engineering, 2002
    Co-Authors: J B Lim, A R Hurson
    Abstract:

    As technological advances are made in software and hardware, the feasibility of accessing information "any time, anywhere" is becoming a reality. Furthermore, the diversity and amount of information available to a given user is increasing at a rapid rate. In a mobile computing environment, a potentially large number of users may simultaneously access the global data; therefore, there is a need to provide a means to allow concurrent management of transactions. Current multiDatabase concurrency control schemes do not address the limited bandwidth and frequent disconnection associated with wireless networks. This paper proposes a new hierarchical concurrency control algorithm. The proposed concurrency control algorithm, v-lock, uses global locking tables created with semantic information contained within the hierarchy. The locking tables are used to serialize global transactions, detect and remove global deadlocks. Additionally, data replication, at the mobile unit, is used to limit the effects of the restrictions imposed by a mobile environment. The replicated data provides additional availability in case of a weak connection or disconnection. Current research has concentrated on page and file-based caching or replication schemes to address the availability and consistency issues in a mobile environment. In a mobile, multiDatabase environment, local autonomy restrictions prevent the use of a page or file-based data replication scheme. This paper proposes a new data replication scheme to address the limited bandwidth and local autonomy restrictions. Queries and the associated data are cached at the mobile unit as a complete object. Consistency is maintained by using a parity-based invalidation scheme. A simple prefetching scheme is used in conjunction with caching to further improve the effectiveness of the proposed scheme. Finally, a simulator was developed to evaluate the performance of the proposed algorithms. The simulation results are presented and discussed.

Liu Shu - One of the best experts on this subject based on the ideXlab platform.

  • Research Synchronization Mechanism for Distributed Heterogeneous Database
    2012 Fourth International Conference on Computational and Information Sciences, 2012
    Co-Authors: Zhang Zhenyou, Liu Shu
    Abstract:

    For the Heterogeneous Database in different physical, it was a key problem how to guarantee the user data synchronization Heterogeneous Database. This paper analyzed data synchronization system for the distributed Heterogeneous Database, the extracting module, data integration module, data update module and put forward a concrete solution.

  • Research of Distributed Heterogeneous Database Based on S2SH and EJB Components
    2012 Fourth International Conference on Computational and Information Sciences, 2012
    Co-Authors: Zhang Zhenyou, Zhang Baoyin, Liu Shu
    Abstract:

    In order to operate the distributed Heterogeneous Database with several different physical, the basic problem must be solved was system integration of the various Heterogeneous Database system. This paper describes the system integration schemes using S2SH(struts2 spring hibernate) and EJB (Enterprise Java Bean)components based on the B/S architecture of distributed Heterogeneous Database , the core content analysis for its data management, user data table information query and data table unification.

  • Research on the integration and query optimization for the distributed Heterogeneous Database
    Proceedings of 2011 International Conference on Computer Science and Network Technology, 2011
    Co-Authors: Zhang Zhenyou, Liu Shu, Jingjing Zhang, Cao Zhi
    Abstract:

    Heterogeneous Database query optimization should study not only the node Database integrated in different Database, but also to solve the strategy problem which the data query optimization. In this paper, it studied integration among the node Database in the distributed Heterogeneous Database system and the query strategy for the data in Heterogeneous Databases. It was put forward the Database of integration solutions based on Hibernate and query optimization strategy that used the tiny user inquires the response time, and for this scheme design in this concrete solution.