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Dissertations / Theses on the topic 'Discriminative classifier'

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Published: 11 March 2023

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1

Masip, Rodó David. "Face Classification Using Discriminative Features and Classifier Combination." Doctoral thesis, Universitat Autònoma de Barcelona, 2005. http://hdl.handle.net/10803/3051.

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A mesura que la tecnologia evoluciona, apareixen noves aplicacions en el mon de la classificació facial. En el reconeixement de patrons, normalment veiem les cares com a punts en un espai de alta dimensionalitat definit pels valors dels seus pixels. Aquesta aproximació pateix diversos problemes: el fenomen de la "la maledicció de la dimensionalitat", la presència d'oclusions parcials o canvis locals en la il·luminació. Tradicionalment, només les característiques internes de les imatges facials s'han utilitzat per a classificar, on normalment es fa una extracció de característiques. Les tècniq

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2

Georgatzis, Konstantinos. "Dynamical probabilistic graphical models applied to physiological condition monitoring." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/28838.

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Intensive Care Units (ICUs) host patients in critical condition who are being monitored by sensors which measure their vital signs. These vital signs carry information about a patient’s physiology and can have a very rich structure at fine resolution levels. The task of analysing these biosignals for the purposes of monitoring a patient’s physiology is referred to as physiological condition monitoring. Physiological condition monitoring of patients in ICUs is of critical importance as their health is subject to a number of events of interest. For the purposes of this thesis, the overall task o

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3

Klautau, Aldebaro. "Speech recognition using discriminative classifiers /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2003. http://wwwlib.umi.com/cr/ucsd/fullcit?p3091208.

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4

Xue, Jinghao. "Aspects of generative and discriminative classifiers." Thesis, Connect to e-thesis, 2008. http://theses.gla.ac.uk/272/.

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Thesis (Ph.D.) - University of Glasgow, 2008.<br>Ph.D. thesis submitted to the Department of Statistics, Faculty of Information and Mathematical Sciences, University of Glasgow, 2008. Includes bibliographical references. Print version also available.

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5

Pernot, Etienne. "Choix d'un classifieur en discrimination." Paris 9, 1994. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1994PA090014.

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Dans cette thèse, nous nous posons le problème de la détermination du classifieur le plus adapté à résoudre un problème donné de discrimination. Le choix du classifieur est déjà guidé par des contraintes opérationnelles, mais au-delà de ces contraintes, et après que le classifieur a été configuré grâce à une base d'apprentissage, c'est le taux de généralisation du classifieur (ou taux de réussite) qui est le critère caractérisant sa performance. Ce taux, généralement inconnu, est estimé à l'aide d'une base de généralisation. Cette estimation dépend donc du problème de discrimination étudié, du

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6

Katz, Marcel [Verfasser]. "Discriminative classifiers for speaker Recognition / Marcel Katz." Saarbrücken : Südwestdeutscher Verlag für Hochschulschriften, 2009. http://www.vdm-verlag.de.

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7

ABDALLAH, HICHAM. "Application de l'analyse relationnelle pour classifier descripteurs et modalites en mode discrimination." Paris 6, 1996. http://www.theses.fr/1996PA066001.

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Dans le processus presente dans la these, quatre niveaux fondamentaux ont ete a l'origine de notre travail: 1 la classification de l'espace des descripteurs ou des variables pour reduire et resserrer cet espace: en introduisant de nouvelles structures (par des criteres d'associations connus) permettant de donner des bornes ou seuils au dela desquels on considere les deux descripteurs ou variables sont ressemblants. Un point important ici est la possibilite de tout expliciter en fonction du rand ou du chi-deux. Cette etude permet de voir apparaitre la notion de severite pour chaque critere, qui

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8

Dastile, Xolani Collen. "Improved tree species discrimination at leaf level with hyperspectral data combining binary classifiers." Thesis, Rhodes University, 2011. http://hdl.handle.net/10962/d1002807.

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The purpose of the present thesis is to show that hyperspectral data can be used for discrimination between different tree species. The data set used in this study contains the hyperspectral measurements of leaves of seven savannah tree species. The data is high-dimensional and shows large within-class variability combined with small between-class variability which makes discrimination between the classes challenging. We employ two classification methods: G-nearest neighbour and feed-forward neural networks. For both methods, direct 7-class prediction results in high misclassification rates. H

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9

Rüther, Johannes. "Navigating Deep Classifiers : A Geometric Study Of Connections Between Adversarial Examples And Discriminative Features In Deep Neural Networks." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-291775.

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Although deep networks are powerful and effective in numerous applications, their high vulnerability to adversarial perturbations remains a critical limitation in domains such as security, personalized medicine or autonomous systems. While the sensitivity to adversarial perturbations is generally viewed as a bug of deep classifiers, recent research suggests that they are actually a manifestation of non-robust features that deep classifiers exploit for predictive accuracy. In this work, we therefore systematically compute and analyze these perturbations to understand how they relate to discrimi

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10

Musayeva, Khadija. "Generalization Performance of Margin Multi-category Classifiers." Thesis, Université de Lorraine, 2019. http://www.theses.fr/2019LORR0096/document.

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Cette thèse porte sur la théorie de la discrimination multi-classe à marge. Elle a pour cadre la théorie statistique de l’apprentissage de Vapnik et Chervonenkis. L’objectif est d’établir des bornes de généralisation possédant une dépendances explicite au nombre C de catégories, à la taille m de l’échantillon et au paramètre de marge gamma, lorsque la fonction de perte considérée est une fonction de perte à marge possédant la propriété d’être lipschitzienne. La borne de généralisation repose sur la performance empirique du classifieur ainsi que sur sa "capacité". Dans cette thèse, les mesures

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11

Dang, Thanh Ha. "Mesures de discrimination et leurs applications en apprentissage inductif." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2007. http://tel.archives-ouvertes.fr/tel-00184691.

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De nos jours, les données disponibles deviennent de plus en plus volumineuses et elles peuvent être de nature très diverse : vagues, manquantes, numériques, symboliques par exemple. Or ce qui importe à l'utilisateur, ce ne sont pas les données elles-mêmes, mais les connaissances qu'on peut en extraire. Face à la quantité de données disponibles, le traitement efficace de données est problématique. Dans cette thèse, nous adoptons une approche d'extraction de connaissances à partir de données basée sur l'apprentissage inductif, plus précisément, par arbres de décision.<br /><br />De façon général

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12

Asper, Roman Yorick [Verfasser], Stephan [Akademischer Betreuer] Waack, and Carsten [Akademischer Betreuer] Damm. "Classifiers for Discrimination of Significant Protein Residues and Protein-Protein Interaction Using Concepts of Information Theory and Machine Learning / Roman Yorick Asper. Gutachter: Stephan Waack ; Carsten Damm. Betreuer: Stephan Waack." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2012. http://d-nb.info/1042969108/34.

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13

Gul, Ahmet Bahtiyar. "Holistic Face Recognition By Dimension Reduction." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1056738/index.pdf.

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Face recognition is a popular research area where there are different approaches studied in the literature. In this thesis, a holistic Principal Component Analysis (PCA) based method, namely Eigenface method is studied in detail and three of the methods based on the Eigenface method are compared. These are the Bayesian PCA where Bayesian classifier is applied after dimension reduction with PCA, the Subspace Linear Discriminant Analysis (LDA) where LDA is applied after PCA and Eigenface where Nearest Mean Classifier applied after PCA. All the three methods are implemented on the Olivetti Resear

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14

Didiot, Emmanuel. "Segmentation parole/musique pour la transcription automatique de parole continue." Phd thesis, Université Henri Poincaré - Nancy I, 2007. http://tel.archives-ouvertes.fr/tel-00187941.

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Dans cette thèse, nous étudions la segmentation d'un flux audio en parole, musique et parole sur musique (P/M). Cette étape est fondamentale pour toute application basée sur la transcription automatique de flux radiophoniques et plus généralement multimédias. L'application visée ici est un système de détection de mots clés dans les émissions radiophoniques. Les performances de ce système dépendront de la bonne segmentation du signal fournie par le système de discrimination parole/musique. En effet, une mauvaise classification du signal peut provoquer des omissions de mots clés ou des fausses a

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15

Sun, Yong-Peng. "A Discriminative Locally-Adaptive Nearest Centroid Classifier for Phoneme Classification." Thesis, 2012. http://hdl.handle.net/10012/6968.

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Phoneme classification is a key area of speech recognition. Phonemes are the basic modeling units in modern speech recognition and they are the constructive units of words. Thus, being able to quickly and accurately classify phonemes that are input to a speech-recognition system is a basic and important step towards improving and eventually perfecting speech recognition as a whole. Many classification approaches currently exist that can be applied to the task of classifying phonemes. These techniques range from simple ones such as the nearest centroid classifier to complex ones such as sup

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16

Hoang, Tran Vu, and 陳武黃. "A Study of Parking Space Detection Based On a Multi-Layer Discriminative Classifier." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/y75ky9.

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碩士<br>國立高雄應用科技大學<br>製造與管理外國學生碩士專班<br>103<br>In this research, we proposed a novel semantic inference framework with multiple layers for vacant parking space detection. The framework consists of an image layer, a patch layer, a space layer, and a lot layer. In the image layer, image patches are selected based on the 3-D parking lot structure. We found the occlusion pattern within each patch reveals partial cues of parking status. Thus, our system extracted lighting-invariant features of patches and trained weak classifiers to recognize the occlusion pattern in the patch layer. The outputs of th

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17

Katz, Marcel [Verfasser]. "Discriminative classifiers for speaker recognition / von Marcel Katz." 2008. http://d-nb.info/989980413/34.

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18

Binder, Carolyn. "Using an Aural Classifier to Discriminate Cetacean Vocalizations." 2012. http://hdl.handle.net/10222/14607.

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To positively identify marine mammals using passive acoustics, large volumes of data are often collected that need to be processed by a trained analyst. To reduce acoustic analyst workload, an automatic detector can be implemented that produces many detections, which feed into an automatic classifier to significantly reduce the number of false detections. This requires the development of a robust classifier capable of performing inter-species classification as well as discriminating cetacean vocalizations from anthropogenic noise sources. A prototype aural classifier was developed at Defence

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19

Liu, Pengfei. "Discriminative training of nai̇ve bayes classifiers for natural language call routing /." 2004.

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Thesis (M.Sc.)--York University, 2004. Graduate Programme in Computer Science and Engineering.<br>Typescript. Includes bibliographical references (leaves 76-79). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url%5Fver=Z39.88-2004&res%5Fdat=xri:pqdiss &rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR11842

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20

(8715537), Kyuseo Han. "Articulated Human Movements Tracking Through Online Discriminative Learning." Thesis, 2020.

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In this thesis, we present a new class of object trackers that are based ona boosted Multiple Instance Learning (MIL) algorithm to track an object in a video sequence. We show how the scope of such trackers can be expanded to the tracking of articulated movements by humans that frequently<br>result in large frame-to-frame variations in the appearance of what needs to be tracked. To deal with the problems caused by such variations, we present a component-based MIL (CMIL) algorithm with boosted learning. The components are the output of an image segmentation algorithm and give the boosted MIL th

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21

Asper, Roman Yorick. "Classifiers for Discrimination of Significant Protein Residues and Protein-Protein Interaction Using Concepts of Information Theory and Machine Learning." Doctoral thesis, 2011. http://hdl.handle.net/11858/00-1735-0000-0006-B3F3-E.

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22

MISHRA, Anamika. "Species Discrimination and Monitoring of Abiotic Stress Tolerance by Chlorophyll Fluorescence Transients." Doctoral thesis, 2012. http://www.nusl.cz/ntk/nusl-55608.

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Chlorophyll fluorescence imaging has now become a versatile and standard tool in fundamental and applied plant research. This method captures time series images of the chlorophyll fluorescence emission of whole leaves or plants upon various illuminations, typically combination of actinic light and saturating flashes. Several conventional chlorophyll fluorescence parameters have been recognized that have physiological interpretation and are useful for, e.g., assessment of plant health status and early detection of biotic and abiotic stresses. Chlorophyll florescence imaging enabled us to probe

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23

(9779444), Nathan Barrett. "Rainbow suits at work: Disclosure and discrimination in the workplace against gay, lesbian, bisexual, transgender and intersex employees." Thesis, 2011. https://figshare.com/articles/thesis/Rainbow_suits_at_work_Disclosure_and_discrimination_in_the_workplace_against_gay_lesbian_bisexual_transgender_and_intersex_employees/13457786.

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"This exploratory study examined people who self identify as gay, lesbian, bisexual, transgender or intersex (GLBTI) to determine the extent of workplace discrimination based on sexual identity in Queensland" -- Abstract.<p></p>

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24

(10746663), Samantha A. Peachey. "Examining Sexual and Relationship Satisfaction as Influenced by the Connection Between Sex Positivity and Perceived Discrimination for Sexual Minority Couples." Thesis, 2021.

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<p>The purpose of this research study was to look at the effects of perceived discrimination and sexual positivity on relationship and sexual satisfaction of sexual minority couples. The present study hypothesizes that there will be a moderating relationship between sexual positivity and perceived discrimination; higher levels of sexual positivity will predict higher relationship and sexual satisfaction, and perceived discrimination will negatively effect relationship and sexual satisfaction of couples with lower sexual positivity. Individuals who identify as a sexual minority were asked to p

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25

Pham, Tung Huy. "Some problems in high dimensional data analysis." 2010. http://repository.unimelb.edu.au/10187/8399.

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The bloom of economics and technology has had an enormous impact on society. Along with these developments, human activities nowadays produce massive amounts of data that can be easily collected for relatively low cost with the aid of new technologies. Many examples can be mentioned here including data from web term-document data, sensor arrays, gene expression, finance data, imaging and hyperspectral analysis. Because of the enormous amount of data from various different and new sources, more and more challenging scientific problems appear. These problems have changed the types of problems wh

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26

(9160868), Jinho Jung. "ESSAYS ON SPATIAL DIFFERENTIATION AND IMPERFECT COMPETITION IN AGRICULTURAL PROCUREMENT MARKETS." Thesis, 2020.

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<div> <p>First Essay: We study the effect of entry of ethanol plants on the spatial pattern of corn prices. We use pre- and post-entry data from corn elevators to implement a clean identification strategy that allows us to quantify how price effects vary with the size of the entrant (relative to local corn production) and with distance from the elevator to the entrant. We estimate Difference-In-Difference (DID) and DID-matching models with linear and non-linear distance specifications. We find that the average-sized entrant causes an increase in corn price that ranges from 10 to 15 cents per

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27

(9790610), Carolyn Daniels. "Exploring Australian women's career transitions: A critical constructivist grounded theory study." Thesis, 2019. https://figshare.com/articles/thesis/Exploring_Australian_women_s_career_transitions_A_critical_constructivist_grounded_theory_study/13453955.

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Multiple factors impact women’s lives after they have transitioned through higher education and into the workforce, including the struggle to achieve a balance between paid work and unpaid care responsibilities. Despite changes in Australian social and cultural attitudes, career transitions remain difficult for many women in Australia. This thesis presents a qualitative, grounded theory study that explores how women in Australia navigate and experience career transitions; specifically, the transitions to higher education and the workforce which form the pathway to their careers. Emerging from

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