Search for dissertations about: "search engine"

Showing result 1 - 5 of 26 swedish dissertations containing the words search engine.

  1. 1. Mining Web Logs to Improve User Experience in Web Search

    University dissertation from Chalmers University of Technology

    Author : Libertad Tansini; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Datavetenskap; Computer science; Web log mining; web search; user recommendation; user intent; user modelling;

    Abstract : The World Wide Web continues to grow in size and diversity and this makes it increasingly hard for users to find valuable information because of heterogeneous form and content of the documents, little knowledge about the reliability and prestige of the documents and a great deal of redundancy. Usually search engines look for documents that contain specific keywords or phrases stated by the users as queries. READ MORE

  2. 2. Supporting Scientific Collaboration through Workflows and Provenance

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Tommy Ellqvist; Linköpings universitet.; Linköpings universitet.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Scientific collaboration; workflow; provenance; search engine; query language; data integration; TECHNOLOGY Information technology Computer science Computer science; TEKNIKVETENSKAP Informationsteknik Datavetenskap Datalogi;

    Abstract : Science is changing. Computers, fast communication, and  new technologies have created new ways of conducting research.  For  instance, researchers from different disciplines are processing and  analyzing scientific data that is increasing at an exponential rate. READ MORE

  3. 3. Parameter Estimation of a DOC from Engine Rig Experiments

    University dissertation from Chalmers University of Technology

    Author : Björn Lundberg; Chalmers tekniska högskola.; Chalmers University of Technology.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Exhaust Aftertreatment Modeling; DOC; Full Scale; Design of Experiments; Parameter Estimation; Engine Test Bench; Multivariate Data Analysis;

    Abstract : In this thesis methods of parameter estimation of a Diesel Oxidation Catalyst (DOC) from engine rig experiments were investigated. The investigation did not only include methods of parameter fitting to experimental data but a large effort was also put into catalyst modeling and experimental design. READ MORE

  4. 4. On the Design of Energy Efficient Aero Engines: Some Recent Innovations

    University dissertation from Chalmers University of Technology

    Author : Richard Avellán; Chalmers tekniska högskola.; Chalmers University of Technology.; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Farkostteknik; Vehicle engineering; Mekanisk och termisk energiteknik; Mechanical and thermal engineering; Strömningsmekanik; Fluid mechanics; aero engine; energy efficiency; turbofan; propeller; inter-turbine reheat; emissions; NOx; variable cycle; MDO;

    Abstract : In the light of the energy crisis of the 1970s, the old aerospace paradigm of flying higher and faster shifted towards the development of more energy efficient air transport solutions. Today, the aeronautical research and development community is more prone to search for innovative solutions, in particular since the improvement rate of change is decelerating somewhat in terms of energy efficiency, which still is far from any physical limits of aero engine and aircraft design. READ MORE

  5. 5. Acoustic Characterization of Turbochargers and Pipe Terminations

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Heiki Tiikoja; KTH.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; acoustical two-port; turbocharger; transmission loss; sound generation; compressor; turbine; IC-engine; inlet system; exhaust system; flow duct; duct termination; reflection coefficient;

    Abstract : In search for quieter engines there is a need for a better understanding of the acoustic properties of engine intake and exhaust system components. Besides mufflers which have the purpose of reducing pressure pulses originating from the internal combustion (IC) engine, there are many components in a modern car exhaust and intake system, e.g. READ MORE