'Query answering' diaporamas de présentation

Introduction to Semantic Web & Semantics for Data and Services

Introduction to Semantic Web & Semantics for Data and Services. Payam Barnaghi Centre for Communication Systems Research Faculty of Engineering and Physical Sciences University of Surrey April 2009. The Semantic Web.

1.09k views • 89 slides

Propositional Approaches to First-Order Theorem Proving

Propositional Approaches to First-Order Theorem Proving. David A. Plaisted UNC Chapel Hill May 2004. History of AI. Early emphasis on general methods Newell Shaw Simon GPS Robinson 1965 resolution Cordell Green question answering Shift to specialized techniques Feigenbaum Expert Systems

1.07k views • 88 slides

Foundations III: Languages, Tools and Services

Foundations III: Languages, Tools and Services. Deborah McGuinness Semantic eScience Fall 2011 Week 5, Oct. 3, 2011. Review of reading Assignment. 2. Ontology Tool Summary, Pellet, OWL-S, SAWSDL, Wine Agent Assignment 2 clarifications? Any comments, questions?. Contents.

989 views • 83 slides

Answering queries across mappings

Answering queries across mappings. Grigoris Karvounarakis University of Pennsylvania. WPE-II Presentation. Global mediated schema (virtual). Query Q. T. Mappings. M 1. M 2. M n. Data integration. Heterogeneous data sources. S 1. S 2. S n. I n. I 2. I 1. J.

596 views • 47 slides

Preference Reasoning in Logic Programming

559 views • 44 slides

Principles of Dataspace Systems

610 views • 42 slides

Data Integration with Uncertainty

Data Integration with Uncertainty. Xin (Luna) Dong Alon Halevy Cong Yu Univ. of Washington Google Inc. Univ. of Michigan @ VLDB 2007. D5. D1. D2. D4. D3. Many Applications Need to Manage Heterogeneous Data Sources. Mediated Schema. D5. D1. D2. D4. D3.

424 views • 34 slides

COEN 350

COEN 350 . Public Key Infrastructure. PKI. Task: Securely distribute public keys. Certificates. Repository for retrieving certificates. Method for revoking certificates. Method of evaluating a chain of certificates from public keys that are known and trusted in advance (TRUST ANCHOR). PKI.

539 views • 33 slides

Model Theory and Calculus for DL-Lite

Model Theory and Calculus for DL-Lite. Evgeny Kharlamov Diego Calvanese, Werner Nutt Free University of Bozen-Bolzano Dresden University of Technology October 2006. Motivation. Query: q. User Interface. Information Sources. Motivation. Problem: Data Integration. Ontology.

438 views • 32 slides

Kolmogorov complexity and its applications

CS860, Winter, 2010. Kolmogorov complexity and its applications. Ming Li School of Computer Science University of Waterloo http://www.cs.uwaterloo.ca/~mli/cs860.html.

434 views • 30 slides

Faster Query Answering in Probabilistic Databases using Read-Once Functions

Faster Query Answering in Probabilistic Databases using Read-Once Functions. Sudeepa Roy Joint work with Vittorio Perduca Val Tannen University of Pennsylvania. Probabilistic Databases. Possible worlds model Each possible world w is a standard database instance, has a probability P[w]

361 views • 28 slides

CS690L Semantic Web and Knowledge Discovery: Concept, Technologies, Tool

428 views • 28 slides

Storing and Querying Fuzzy Knowledge in the Semantic Web

National Technical University of Athens, Greece School of Electrical and Computer Engineering Department of Computer Science Image, Video and Multimedia Laboratory. Storing and Querying Fuzzy Knowledge in the Semantic Web. N. Simou, G. Stoilos, V. Tzouvaras, G. Stamou, S. Kollias

464 views • 26 slides

CSE 636 Data Integration

CSE 636 Data Integration. Overview. Fall 2006. What is Data Integration?. The problem of providing uniform (sources transparent to user) access to (query, and eventually updates too) multiple (even 2 is a problem!) autonomous (not affect the behavior of sources)

382 views • 26 slides

CSE 636 Data Integration

CSE 636 Data Integration. Overview. Data Warehouse Architecture. ?. OLAP / Decision Support Data Cubes / Data Mining. ?. Users. Applications. Relational Database (Warehouse). ETL Tools (Extract-Transform-Load). Data Cleaning. Data Source. Data Source. Data Source.

1.4k views • 22 slides

Answering distance queries in directed graphs using fast matrix multiplication

Answering distance queries in directed graphs using fast matrix multiplication. Raphael Yuster. University of Haifa. Uri Zwick. Tel Aviv University. Single-Source Shortest Paths. SSSP algorithm. Distance vector. s. n.

330 views • 19 slides

L ogics for D ata and K nowledge R epresentation

L ogics for D ata and K nowledge R epresentation. ClassL (part 3): Reasoning with an ABox. Outline. World descriptions, assertions (ABox) Reasoning with the ABox Satisfiability/Consistency Instance checking Instance retrieval Concept realization

280 views • 17 slides

ULoad: choosing the right storage for your XML application

ULoad: choosing the right storage for your XML application. Date. Andrei Arion INRIA Futurs and Univ. Paris XI, France Veronique Benzaken Univ. Paris XI, France Ioana Manolescu INRIA Futurs, France Ravi Vijay IIT Bombay, India. ULoad prototype demonstration.

218 views • 11 slides

Tools for DAML-Based Services, Document Templates, and Query Answering Richard Fikes

Tools for DAML-Based Services, Document Templates, and Query Answering Richard Fikes Deborah McGuinness Sheila McIlraith Tran Cao Son Honglei Zeng Steve Wilder Jessica Jenkins Knowledge Systems Laboratory Stanford University www.ksl.stanford.edu.

157 views • 7 slides

Data Integration Faces 3 Challenges

Data Integration Faces 3 Challenges. Data Integration Faces 3 Challenges. Data Integration Faces 3 Challenges. Scissors. Paper Scissors. Data Integration Faces 3 Challenges. Scissors. Glue. Existing Solutions Assume Independence of Data Sources. Data fusion Truth discovery.

196 views • 5 slides