Sökning: "Change detection"

Visar resultat 16 - 20 av 347 avhandlingar innehållade orden Change detection.

  1. 16. Perceptually motivated speech recognition and mispronunciation detection

    Författare :Christos Koniaris; Olov Engwall; Martin Cooke; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; feature extraction; feature selection; auditory models; MFCCs; speech recognition; distortion measures; perturbation analysis; psychoacoustics; human perception; sensitivity matrix; pronunciation error detection; phoneme; second language; perceptual assessment;

    Sammanfattning : This doctoral thesis is the result of a research effort performed in two fields of speech technology, i.e., speech recognition and mispronunciation detection. Although the two areas are clearly distinguishable, the proposed approaches share a common hypothesis based on psychoacoustic processing of speech signals. LÄS MER

  3. 17. Distributed Detection and Its Applications with Energy Harvesting Wireless Networks

    Författare :Sinchan Biswas; Subhrakanti Dey; Steffi Knorn; Anders Ahlen; Pierluigi Salvo Rossi; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy harvesting; Wireless Sensor Networks; Distributed Detection; Cognitive Radio Networks; Electrical Engineering with specialization in Signal Processing; Elektroteknik med inriktning mot signalbehandling;

    Sammanfattning : With the advent and widespread applications of high data-rate wireless services and devices, two of the fundamental resources in wireless communication have become extremely important and are scarce. These two resources are bandwidth and energy respectively. LÄS MER

  4. 18. Analyzing Vegetation Trends with Sensor Data from Earth Observation Satellites

    Författare :Sadegh Jamali; Institutionen för naturgeografi och ekosystemvetenskap; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Change detection; Satellite sensor data; Time series analysis; Vegetation dynamics; Vegetation index;

    Sammanfattning : Abstract This thesis aims to advance the analysis of nonlinear trends in time series of vegetation data from Earth observation satellite sensors. This is accomplished by developing fast, efficient methods suitable for large volumes of data. LÄS MER

  5. 19. Earth satellites and air and ground-based activities

    Författare :Ulf Ekblad; KTH; []
    Nyckelord :Remote sensing; reconnaissance; sensor; information acquisition; satellite imagery; image processing; image analysis; change detection; pixel difference; neuron network; cortex model; PCNN; ICM; entanglement; Earth observation; nuclear explosion; SPO;

    Sammanfattning : This thesis, Earth satellites and detection of air andground based activities by Ulf Ekblad of the Physics departmentat the Royal Institute of Technology (KTH), addresses theproblem of detecting military activities in imagery. Examplesof various techniques are presented. LÄS MER

  7. 20. Efficient Automatic Change Detection in Software Maintenance and Evolutionary Processes

    Författare :Sebastian Hönel; Morgan Ericsson; Welf Löwe; Anna Wingkvist; Přemek Brada; Linnéuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Software Maintenance; Software Evolution; Effort Estimation; Commit Classification; Computer Science; Datavetenskap; Software Technology; Programvaruteknik;

    Sammanfattning : Software maintenance is such an integral part of its evolutionary process that it consumes much of the total resources available. Some estimate the costs of maintenance to be up to 100 times the amount of developing a software. LÄS MER