Search for dissertations about: "principal component analysis PCA"

Showing result 1 - 5 of 87 swedish dissertations containing the words principal component analysis PCA.

  1. 1. Very Low Bitrate Video Communication A Principal Component Analysis Approach

    University dissertation from Umeå : Tillämpad fysik och elektronik

    Author : Ulrik Söderström; Umeå universitet.; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Video compression; Very low bitrate; Principal component analysis; Complexity; Semantically important areas; Wearable video; TECHNOLOGY Electrical engineering; electronics and photonics Other electrical engineering; electronics and photonics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Övrig elektroteknik; elektronik och fotonik;

    Abstract : A large amount of the information in conversations come from non-verbal cues such as facial expressions and body gesture. These cues are lost when we don't communicate face-to-face. But face-to-face communication doesn't have to happen in person. With video communication we can at least deliver information about the facial mimic and some gestures. READ MORE

  2. 2. Principal Word Vectors

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Ali Basirat; Uppsala universitet.; [2018]
    Keywords : HUMANIORA; HUMANITIES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; word; context; word embedding; principal component analysis; PCA; sparse matrix; singular value decomposition; SVD; entropy;

    Abstract : Word embedding is a technique for associating the words of a language with real-valued vectors, enabling us to use algebraic methods to reason about their semantic and grammatical properties. This thesis introduces a word embedding method called principal word embedding, which makes use of principal component analysis (PCA) to train a set of word embeddings for words of a language. READ MORE

  3. 3. Sources of dioxins and other POPs to the marine environment Identification and apportionment using pattern analysis and receptor modeling

    University dissertation from Umeå : Umeå University

    Author : Kristina Sundqvist; Umeå universitet.; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; air-water gas exchange; chiral; congener pattern; enantiomer; enantiomeric fraction; fugacity; HCH; hexachlorocyclohexane; homologue profile; indicator congener; isomer pattern; pattern analysis; PCA; PCB; PCDD F; PMF; polychlorinated dibenzofuran; polychlorinated dibenzo-p-dioxin; polychlorinated biphenyl; positive matrix factorization; principal component analysis; receptor modeling; source apportioning; source; source tracing; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi; NATURAL SCIENCES Chemistry Environmental chemistry Persistent organic compounds; NATURVETENSKAP Kemi Miljökemi Persistenta organiska föreningar;

    Abstract : In the studies underlying this thesis, various source tracing techniques were applied to environmental samples from the Baltic region. Comprehensive sampling and analysis of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) in surface sediments in Swedish coastal and offshore areas resulted in a unique data set for this region. READ MORE

  4. 4. Multivariate design of molecular docking experiments An investigation of protein-ligand interactions

    University dissertation from Umeå : Umeå universitet. Kemiska institutionen

    Author : David Andersson; Umeå universitet.; [2010]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Molecular docking; chemometrics; multivariate analysis; principal component analysis; PCA; design of experiments; DoE; partial least-square projections to latent structures; PLS; scoring functions; ligand-binding cavity; major histocompatibility complex; MHC; glycopeptide; T-cell.; NATURAL SCIENCES Chemistry Organic chemistry Pharmaceutical chemistry; NATURVETENSKAP Kemi Organisk kemi Läkemedelskemi; läkemedelskemi; läkemedelskemi;

    Abstract : To be able to make informed descicions regarding the research of new drug molecules (ligands), it is crucial to have access to information regarding the chemical interaction between the drug and its biological target (protein). Computer-based methods have a given role in drug research today and, by using methods such as molecular docking, it is possible to investigate the way in which ligands and proteins interact. READ MORE

  5. 5. Process analytical methods for monitoring of the film coating on pharmaceutical pellets and tablets using NIR spectrometry and image analysis

    University dissertation from Martin Andersson, Technical Analytical Chemistry, Lund University, P.O.Box 124, S-221 00 Lund, Sweden

    Author : Martin Andersson; Lunds universitet.; Lund University.; [1999]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; PLS; PCA; PAC; NIR; chemometrics; moving samples; information depth; release rate; image analysis; near infrared; process analytical chemistry; thickness; coating; film; tablets; Pellets; granules; Analytical chemistry; Analytisk kemi;

    Abstract : Popular Abstract in Swedish Inom processanalytisk kemi är uppgiften att bestämma viktiga egenskaper i en kemisk process under det att tillverkningen fortlöper. Ett vanligt exempel är att man bestämmer halten av något ämne. READ MORE