Sökning: "principal component analysis"

Visar resultat 1 - 5 av 201 avhandlingar innehållade orden principal component analysis.

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

    Detta är en avhandling från Umeå : Tillämpad fysik och elektronik

    Författare :Ulrik Söderström; Umeå universitet.; [2008]
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  2. 2. Very low bitrate facial video coding based on principal component analysis

    Detta är en avhandling från Umeå : Tillämpad fysik och elektronik

    Författare :Ulrik Söderström; Umeå universitet.; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Image processing; Video processing; Very low bitrate coding; TECHNOLOGY Electrical engineering; electronics and photonics Other electrical engineering; electronics and photonics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Övrig elektroteknik; elektronik och fotonik;

    Sammanfattning : This thesis introduces a coding scheme for very low bitrate video coding through the aid of principal component analysis. Principal information of the facial mimic for a person can be extracted and stored in an Eigenspace. Entire video frames of this persons face can then be compressed with the Eigenspace to only a few projection coefficients. LÄS MER

  3. 3. Principal Word Vectors

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Ali Basirat; Uppsala universitet.; [2018]
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  4. 4. Metabolic analysis of shikimic acid producing Escherichia coli

    Detta är en avhandling från Chemical Engineering, Lund University

    Författare :Louise Johansson; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kemiteknik och kemisk teknologi; Biokemi; metabolism; Chemical technology and engineering; transcriptome analysis; phosphorus-limitation; carbon-limitation; fed-batch; chemostat; batch; fermentation technology; Escherichia coli; shikimic acid; Biotechnology; Bioteknik; Metabolism; Biochemistry; principal component analysis; 2D-fluorescence spectrophotometry; metabolic flux analysis; carbon-rich;

    Sammanfattning : Shikimic acid production using recombinant E.coli has been developed during the past 15 years due to the increased demand of this product, primarily as a starting material for the anti-influensa medicine Tamiflu?. A detailed metabolic analysis of a shikimic acid producing E. LÄS MER

  5. 5. Metoder för informationsoptimering vid organisk syntes

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Åke Nordahl; Umeå universitet.; [1990]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Carboxamides; Carboxylic acids; Complex reducing agents CRA ; Experimental design; Lewis acids; Multivariate analysis; Multivariate design; Order of introduction; Principal component analysis PCA ; Principal component multiple regression PCMR ; Principal properties; Screening;

    Sammanfattning : .... LÄS MER