Download or read book Instance level Integration Query Processing and Optimization in Federated Database Systems written by Ee-Peng Lim and published by . This book was released on 1994 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Federated Query Processing for the Semantic Web written by C. Buil-Aranda and published by IOS Press. This book was released on 2014-01-22 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last years, the amount of RDF data has increased exponentially over the Web, exposed via SPARQL endpoints. These SPARQL endpoints allow users to direct SPARQL queries to the RDF data. Federated SPARQL query processing allows to query several of these RDF databases as if they were a single one, integrating the results from all of them. This is a key concept in the Web of Data and it is also a hot topic in the community. Besides of that, the W3C SPARQL-WG has standardized it in the new Recommendation SPARQL 1.1._x000D_ This book provides a formalisation of the W3C proposed recommendation. This formalisation allows to identify existing errors and allows to correct them before the implementation phase or when the execution of these federated queries start. The book constitutes a valuable resource for any implementer since it also proposes solutions to the problems identified as well as proposing a set of SPARQL pattern reordering rules, which reduce the execution time of federated queries significantly._x000D_ Another strong point of this book is the research methodology followed. It states clearly the problems in the state of the art, next defines the research hypothesis for next providing a thoroughly analysis of the semantics of the SPARQL 1.1 specification. Once the theoretical part is concluded the book steps into the implementation part, describing clearly the implementation decisions for finally evaluating the overall system.
Download or read book Knowledge Graphs and Big Data Processing written by Valentina Janev and published by Springer Nature. This book was released on 2020-07-15 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book is part of the LAMBDA Project (Learning, Applying, Multiplying Big Data Analytics), funded by the European Union, GA No. 809965. Data Analytics involves applying algorithmic processes to derive insights. Nowadays it is used in many industries to allow organizations and companies to make better decisions as well as to verify or disprove existing theories or models. The term data analytics is often used interchangeably with intelligence, statistics, reasoning, data mining, knowledge discovery, and others. The goal of this book is to introduce some of the definitions, methods, tools, frameworks, and solutions for big data processing, starting from the process of information extraction and knowledge representation, via knowledge processing and analytics to visualization, sense-making, and practical applications. Each chapter in this book addresses some pertinent aspect of the data processing chain, with a specific focus on understanding Enterprise Knowledge Graphs, Semantic Big Data Architectures, and Smart Data Analytics solutions. This book is addressed to graduate students from technical disciplines, to professional audiences following continuous education short courses, and to researchers from diverse areas following self-study courses. Basic skills in computer science, mathematics, and statistics are required.
Download or read book Decoupled Query Optimization for Federated Database Systems written by Amol V. Deshpande and published by . This book was released on 2001 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interconnecting Heterogeneous Information Systems written by Athman Bouguettaya and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: Information systems are the backbone of many of today's computerized applications. Distributed databases and the infrastructure needed to support them have been well studied. However, this book is the first to address distributed database interoperability by examining the successes and failures, various approaches, infrastructures, and trends of the field. A gap exists in the way that these systems have been investigated by real practitioners. This gap is more pronounced than usual, partly because of the way businesses operate, the systems they have, and the difficulties created by systems' autonomy and heterogeneity. Telecommunications firms, for example, must deal with an increased demand for automation while at the same time continuing to function at their current level. While academics are focusing on investigating differences between distributed databases, federated databases, heterogeneous databases, and, more generally, among loosely connected and tightly coupled systems, those who have to deal with real problems right away know that the only relevant research is the one that will ensure that their system works to produce reasonably correct results. Interconnecting Heterogeneous Information Systems covers the underlying principles and infrastructures needed to realize truly global information systems. The book discusses technologies related to middleware, the Web, workflows, transactions, and data warehousing. It also overviews architectures with a discussion of critical issues. The book gives an overview of systems that can be viewed as learning platforms. While these systems do not translate to successful commercial realities, they push the envelope in terms of research. Successful commercial systems have benefited from the experiments conducted in these prototypes. The book includes two case studies based on the authors' own work. Interconnecting Heterogeneous Information Systems is suitable as a textbook for a graduate-level course on Interconnecting Heterogeneous Information Systems, as well as a secondary text for a graduate-level course on database or information systems, and as a reference for researchers and practitioners in industry.
Download or read book Proceedings of the Twenty fifth International Conference on Very Large Databases Edinburgh Scotland UK 7 10 September 1999 written by Malcolm Atkinson and published by Morgan Kaufmann Publishers. This book was released on 1999 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the silver anniversary of one of the longest running database conferences. VLDB is among the best established forums for discussion in the international database community and is organized every year by the VLDB Endowment.
Download or read book Learning Techniques for Query Optimization in Federated Database Systems written by Moira Norrie and published by . This book was released on 1989 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Query Processing and Optimization in Information integration Systems written by Chen Li and published by . This book was released on 2001 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book RIDE IMS 93 Third International Workshop on Research Issues in Data Engineering written by H.-J. Schek and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 1993 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Held in Vienna, Austria, April 1993, the workshop heard work-in-progress, industrial, and position papers, which are presented along with panel discussions. Among the topics: lean languages and models, interdatabase consistency and constraints, schematic issues, query processing and optimization, tr
Download or read book Database Systems For Advanced Applications 93 Proceedings Of The 3rd International Symposium On Database Systems For Advanced Applications written by S C Moon and published by World Scientific. This book was released on 1993-03-18 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume contains 52 technical research papers on multidatabases, distributed DB, multimedia DB, object-oriented DB, real-time DB, temporal DB, deductive DB, and intelligent user interface. Some industrial papers are also included.
Download or read book Advanced Methods and Technologies for Agent and Multi Agent Systems written by D. Barbucha and published by IOS Press. This book was released on 2013-05-14 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of agent and multi-agent systems is concerned with the development and evaluation of sophisticated, AI-based, problem solving and control architectures for both single and multi-agent systems. This book presents the proceedings of the 7th KES Conference on Agent and Multi-agent Systems – Technologies and Applications (KES-AMSTA 2013), held in Hue City, Vietnam, in May 2013. The KES-AMSTA 2013 conference provides an internationally respected forum for scientific research in the technologies and applications of agent and multi-agent systems. In all, 44 papers were selected for oral presentation and publication in this volume. Special attention is paid to the feature topics of intelligent technologies and applications in the area of e-health, social networking, self-organizing systems, economics and trust management. Other topics covered include: agent oriented software engineering; beliefs engineering; desires and intentions representation; agent cooperation, coordination, negotiation, organization and communication; distributed problem-solving; specification of agent communication languages; formalization of ontologies; and conversational agents. The book highlights new trends and challenges in agent and multi-agent research, and will be of interest to the research community working in the fields of artificial intelligence, collective computational intelligence, robotics, dialogue systems and, in particular, agent and multi-agent systems, technologies and applications.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2005 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Query Optimization for Database Federation Systems written by Di Wang and published by . This book was released on 2009 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Database federation is one approach to data integration, in which a middleware, called mediator, provides uniform access to a number of heterogeneous data sources. In this thesis, we focus on the query optimization for distributed joins over database federation. One important observation in query optimization over distributed database system is that run-time conditions (namely available buffer size, CPU utilization in machine and network environment) can significantly affect the execution cost of a query plan. However, in existing database federation systems, very few studies have addressed run-time conditions. It is a challenging problem, because usually the mediator is not able to know the run-time conditions of remote sites and considering run-time conditions will bring about extra complexity to the optimizer. This thesis proposes the Cluster-and-Conquer algorithm for query optimization over database federation while efficiently considering run-time conditions. This algorithm has three-fold benefits. Firstly, the run-time conditions of machines are now available for cluster mediator. Secondly, each cluster mediator can deal with its own sub query concurrently, so the complexity of processing query plan is decreased. Thirdly, the algorithm outperforms other related approaches in terms of "cost of costing", because it removes unnecessary inter-cluster operations in the early stage. I have implemented a prototype data federation system with Cluster-and-Conquer algorithm. The experimental results showed the capabilities and efficiency of our algorithm and described the target scenarios where the algorithm performs better than other related approaches.
Download or read book Database and Expert Systems Applications written by A. Hameurlain and published by Springer Science & Business Media. This book was released on 1997-08-20 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the refereed proceedings of the 8th International Conference on Database and Expert Systems Applications, DEXA '97, held in Toulouse, France, September 1997. The 62 revised full papers presented in the book, together with three invited contributions, were selected from a total of 159 submissions. The papers are organized in sections on modeling, object-oriented databases, active and temporal aspects, images, integrity constraints, multimedia databases, deductive databases and knowledge-based systems, allocation concepts, data interchange, digital libraries, transaction concepts, learning issues, optimization and performance, query languages, maintenance, federated databases, uncertainty handling and qualitative reasoning, and software engineering and reusable software.
Download or read book Optimization of query processing in distributed database systems written by Goker Gursel and published by . This book was released on 1983 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Optimization of Query Processing on Distributed Database Systems written by Alan Raymond Hevner and published by . This book was released on 1981 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Query Optimization in Distributed Database Systems written by C-W. Chung and published by . This book was released on 1983 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
