Sökning: "Principal Component"

Visar resultat 1 - 5 av 282 avhandlingar innehållade orden Principal Component.

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

   Författare :Ulrik Söderström; Haibo Li; Luis Torres; Umeå universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Video compression; Very low bitrate; Principal component analysis; Complexity; Semantically important areas; Wearable video; Other electrical engineering; electronics and photonics; 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

3. 2. Principal Word Vectors

   Författare :Ali Basirat; Joakim Nivre; Hinrich Schütze; Uppsala universitet; []
   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. 3. Very low bitrate facial video coding : based on principal component analysis

   Författare :Ulrik Söderström; Haibo Li; Umeå universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Image processing; Video processing; Very low bitrate coding; Other electrical engineering; electronics and photonics; 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

5. 4. Simple haptics : Sketching perspectives for the design of haptic interactions

   Författare :Camille Moussette; Daniel Fällman; Bill Buxton; William Verplank; Umeå universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; NATURVETENSKAP; NATURAL SCIENCES; interaction design; haptics; haptic interactions; sketching; sketching in hardware; prototypes; prototyping; industrial design; human computer interaction; design research; research through desgin;

   Sammanfattning : Historically, haptics—all different aspects of the sense of touch and its study—has developed around very technical and scientific inquiries. Despite considerable haptic research advances and the obviousness of haptics in everyday life, this modality remains mostly foreign and unfamiliar to designers. LÄS MER

7. 5. Norovirus and rotavirus susceptibility : studies from a Nicaraguan birth cohort

   Författare :Yaoska Reyes; Johan Nordgren; Lennart Svensson; Miren Iturriza-Gómara; Linköpings universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Norovirus; Rotavirus; Birth cohort; Gastroenteritis; Incidence; Children; Secretor; Immune response.;

   Sammanfattning : Norovirus and rotavirus are major causes of pediatric acute gastroenteritis (AGE). It is estimated that norovirus is responsible for ~20% of all diarrheal diseases in children worldwide and causes approximately 200,000 deaths each year, mostly in young children and the elderly. LÄS MER