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Showing 1 to 20 of 22 for “"Wavelet Transformation"”.

  1. Statistical shape analysis of neuroanatomical structures based on spherical wavelet transformation

    Yu, Peng, Ph. D. Massachusetts Institute of TechnologyMassachusetts Institute of Technology2008

    … of brain structures using biorthogonal spherical wavelets. Using this wavelet-based shape representation, we build multi-scale shape models and study the localized cortical folding variations in a normal population using Principal Component Analysis (PCA). We then build a shape-based …

    mit Repository record

  2. Statische und kinematische topographische Darstellungen der Aktivität des Musculus masseter durch klassische Analysemethoden und Wavelet-Transformation

    Surwald, Christian

    … Momente des Skalogramms der kontinuierlichen Wavelet-Transformation (CWT) berechnet. Bei progressiver Kraftsteigerung wechselte des Aktivitätszentrums. Ausdauernde Kontraktionen waren durch rotatorische Variation, Kauen durch zyklische Aktivitätsmaxima über dem unteren Muskeldrittel …

    freiburg-diss Repository record

  3. Aktive Regionen der Sonnenoberfläche und ihre zeitliche Variation in zweidimensionaler Spektro-Polarimetrie

    Nickelt-Czycykowski, Iliya PeterUniversität Potsdam

    … Ort und Zeit werden mit Hilfe der Fourier- und Wavelet-Transformation weiter analysiert. Als Resultat lässt sich die Existenz eines hochfrequenten Bandes für Geschwindigkeitsoszillationen mit einer zentralen Frequenz von 75 Sekunden (13 mHz) bestätigen. In größeren photosphärischen Höhen von …

    potsdam-diss Repository record

  4. Trend Analysis of Belief-State History with Discrete Wavelet Transform for Improved Intention Discovery

    Mulpuri, VIjaya KrishnaUniversity of Windsor2016

    … model and to analyze its trend with discrete wavelet transformation (DWT). Accordingly, a new algorithm is developed to improve the accuracy of intention discovery with trend analysis, and to reduce the dialog length by switching POMDP policies between contextual control modes according to the …

    windsor Repository record

  5. Detection and Classification of Disturbances in Islanded Micro-grid

    Wang, YunqiUNSW, Sydney2018

    … in the time domain. This thesis utilizes wavelet transformation (WT) method to detect and analyse the disturbance signals in the islanded micro-grid. The signals are collected from both simulation and experimental setup. The wavelet-based and time domain based feature extraction algorithms …

    unsw Repository record

  6. Intelligent Fault Location for Smart Power Grids

    Livani, HanifVirginia Tech2014

    … of the grid. The developed methods utilize wavelet transformation to extract the traveling wave information in the very fast voltage and current transients which are initiated immediately after a fault occurs, support vector machines to classify the fault type and identify the faulted …

    vt Repository record

  7. Age-Related Changes to the P3a and P3b

    Sciberras-Lim, Evatte TianaResearchSpace@Auckland2023

    … to the P3a and P3b. In chapter 2, we perform a wavelet transformation (WT) analysis of the P3a and P3b in younger and older adults to explore the age-related changes to the underlying neurocognitive processes involved in target and distractor processing. In chapter 3, we use dynamic causal …

    auckland-ms Repository record

  8. A Dynamic and Thermodynamic Approach to Complexity.

    Yang, JinUniversity of North Texas2003

    … sequence. The concepts of fractal, multifractal, wavelet transformation and wavelet transform maximum modulus (WTMM) method are introduced. Artificial time sequences are generated by the memory beyond memory model to mimic the heart beating sequence. Using WTMM method, the multifratal singular …

    unt Repository record

  9. Die Kapitalstruktur europäischer Emittenten von bedingten Pflichtwandelanleihen im Bankensektor: eine robuste Korrelationsund Portfoliooptimierungsanalyse mit besonderer Berücksichtigung der Wavelet-Analyse und von Bayesschen Netzen

    Zwyssig, S.Middlesex University / KMU Akademie & Management AG2023

    … the correlation of returns and are based on the Wavelet Analysis and on Bayesian Nets. The estimation results will feature rolling and extending sample windows and be implemented in a standard mean-variance optimisation algorithm to construct optimal portfolios. The performance of these optimal …

    middlesex Repository record

  10. PROCESSING AND CLASSIFICATION OF PHYSIOLOGICAL SIGNALS USING WAVELET TRANSFORM AND MACHINE LEARNING ALGORITHMS

    Bsoul, Abed Al-Raoof2016

    … waves i.e. P, QRS, and T, are described. A wavelet-based method is implemented to facilitate and enhance the detection process. The method not only provides high detection accuracy, but also efficient in regards to memory and execution time. In addition, the method is robust against noise …

    vcu Repository record

  11. Techniques for Content-based Image Characterization in Wavelets Domain

    Voulgaris, Georgios2008

    … content-based image retrieval (CBIR) systems in wavelets domain using texture analysis. Attention was drawn on CBIR in transform domain and in particular wavelets because of the excellent characteristics for compression and texture extraction applications and the wide adoption in both the …

    southwales Repository record

  12. Multiscale modeling and model predictive control of processing systems

    Karslıgil, Orhan I. (Orhan Ismet), 1972-Massachusetts Institute of Technology2000

    … a multiscale (time/scale) domain. Based on the wavelet transformation of time domain models, the multiscale models are defined on dyadic or higher-order trees, whose nodes are used to index the values of any variable, localized in both time and scale (range of frequencies). The objective …

    mit Repository record

  13. Multipoint measurements of field aligned current density in the auroral zone

    Zheng, Yihua

    … very complicated in the sense that it requires transformation from a spinning and precessing coordinate system (measurements are in this system) to a non-spinning, non-processing, Earth-magnetic-field aligned B-L system (z axis is along B---the Earth magnetic field, x is in the B-L plane and …

    unh-thes Repository record

  14. Multiphotonenmikroskopische Untersuchungen und Kategorisierung von humanem Knorpelgewebe sowie 2-Photonen-Mikroendoskopie

    Bergmann, ThorstenUniversität Bielefeld

    … Merkmalsräumen mittels diskreter Wavelet-Transformation. Die Auswertung dieser Merkmale erfolgte mit selbstorganisierenden Karten. Auf diese Weise konnte eine Klassifizierung in vier Arthrosestadien erzielt werden, die in bisherigen Vergleichen zu makroskopischen Befunden sehr gut …

    bielefeld Repository record

  15. Segmentation and Fracture Detection in CT Images for Traumatic Pelvic Injuries

    Wu, Jie2017

    … using a hierarchical algorithm based on wavelet transformation, adaptive windowing, boundary tracing and masking. Also, a quantitative measure of fracture severity based on pelvic CT scans is defined and explored. The results are promising, demonstrating that the proposed method not only …

    vcu Repository record

  16. Investigation of new feature descriptors for image search and classification

    Sinha, Atreyee

    … search and classification. Based on the Gabor wavelet transformation, whose kernels are similar to the 2D receptive field profiles of the mammalian cortical simple cells, a series of new image descriptors is developed. Specifically, first, a new color Gabor-HOG (GHOG) descriptor is introduced …

    njit Repository record

  17. New contributions in overcomplete image representations inspired from the functional architecture of the primary visual cortex = Nuevas contribuciones en representaciones sobrecompletas de imágenes inspiradas por la arquitectura funcional de la corteza visual primaria

    Fischer, Sylvain Gael FredericTelecomunicacion2007

    … proposes first a self-invertible log-Gabor wavelet transformation inspired from the receptive field and multiresolution arrangement of the simple cells in the primary visual cortex (V1). This transform shows promising abilities for noise elimination. Second, interactions observed between V1 …

    upm Repository record

  18. Real-time Realistic Rendering And High Dynamic Range Image Display And Compression

    Xu, Ruifeng

    … respectively. The other is based on the wavelet transformation. It first transforms the raw image data into the logarithmic domain, then quantizes the logarithmic data into the integer domain, and finally applies the wavelet based JPEG2000 encoder for entropy compression and bit stream …

    ucf

  19. Automatic feature extraction for time series analysis using deep and machine learning

    Butt, Fatima Sajid2024

    … which are obtained through continuous wavelet transform, serve as feature extractors. The trained model accurately distinguishes ECGs with fall activity from those without at an accuracy of 98.02%. The robustness of the algorithm is verified by augmenting the experimental dataset with …

    cadiz Repository record

  20. LARGE-SCALE DATA ANALYSIS OF GENE EXPRESSION MAPS OBTAINED BY VOXELATION

    An, LiTemple University. Libraries2012

    … pair of feature vectors which were extracted by wavelet transformation from the hemispheres averaged gene expression maps. Similarities of gene functions were identified by Lin's method based on gene ontology structures. On the other side, we proposed a multiple clustering approach, combined with …

    temple Repository record

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