Search for dissertations about: "rewrite optimization"

Found 4 swedish dissertations containing the words rewrite optimization.

2. 1. Scalable Preservation, Reconstruction, and Querying of Databases in terms of Semantic Web Representations

   Author : Silvia Stefanova; Tore Risch; Stefan Decker; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; RDF; RDFS; RDF view; SPARQL; SPARQL query processing; rewrite optimization; Topic Maps; querying of RDF views; archive relational databases; reconstruct archived databases; Datavetenskap med inriktning mot databasteknik; Computer Science with specialization in Database Technology;

   Abstract : This Thesis addresses how Semantic Web representations, in particular RDF, can enable flexible and scalable preservation, recreation, and querying of databases.An approach has been developed for selective scalable long-term archival of relational databases (RDBs) as RDF, implemented in the SAQ (Semantic Archive and Query) system. READ MORE

4. 2. Main-Memory Query Processing Utilizing External Indexes

   Author : Thanh Truong; Tore Risch; Martin Kersten; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Database indexing; query processing; index structures; main-memory; index validation; Datavetenskap med inriktning mot databasteknik; Computer Science with specialization in Database Technology;

   Abstract : Many applications require storage and indexing of new kinds of data in main-memory, e.g. color histograms, textures, shape features, gene sequences, sensor readings, or financial time series. READ MORE

5. 3. Automatic Parallelization of Equation-Based Simulation Programs

   Author : Peter Aronsson; Peter Fritzson; Christoph Kessler; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Heavy-duty simulation; Parallel computers; Automatic parallelization; Clustering; Computer science; Datavetenskap;

   Abstract : Modern equation-based object-oriented modeling languages which have emerged during the past decades make it easier to build models of large and complex systems. The increasing size and complexity of modeled systems requires high performance execution of the simulation code derived from such models. READ MORE

6. 4. Initialization Methods for System Identification

   Author : Christian Lyzell; Lennart Ljung; Martin Enqvist; Magnus Jansson; Linköpings universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; System identification; Initialization methods; Regressor selection; Identifiability; Automatic control; Reglerteknik;

   Abstract : In the system identification community a popular framework for the problem of estimating a parametrized model structure given a sequence of input and output pairs is given by the prediction-error method. This method tries to find the parameters which maximize the prediction capability of the corresponding model via the minimization of some chosen cost function that depends on the prediction error. READ MORE