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Dissertations / Theses on the topic 'Noisy Texts'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Tabassum, Binte Jafar Jeniya. "Information Extraction From User Generated Noisy Texts." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1606315356821532.

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2

Coetsee, Dirko. "Conditional random fields for noisy text normalisation." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96064.

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Thesis (MScEng) -- Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: The increasing popularity of microblogging services such as Twitter means that more and more unstructured data is available for analysis. The informal language usage in these media presents a problem for traditional text mining and natural language processing tools. We develop a pre-processor to normalise this noisy text so that useful information can be extracted with standard tools. A system consisting of a tokeniser, out-of-vocabulary token identifier, correct candidate generator, and N-gram language model is propo

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Toth, Leah Hutchison. "Resonant Texts: Sound, Noise, and Technology in Modern Literature." UKnowledge, 2016. http://uknowledge.uky.edu/english_etds/29.

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“Resonant Texts” draws from literary criticism, history, biography, media theory, and the history of technology to examine representations of sound and acts of listening in modern experimental fiction and drama. I argue that sound recording technology, invented in the late 19th century, equipped 20th century authors including James Joyce, Virginia Woolf, Ralph Ellison, and Samuel Beckett with new resources for depicting human consciousness and experience. The works in my study feature what I call “close listening,” a technique initially made possible by the phonograph, which forced listeners t

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4

Toska, Marsida. "A Rule-Based Normalization System for Greek Noisy User-Generated Text." Thesis, Uppsala universitet, Institutionen för lingvistik och filologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-424777.

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The ever-growing usage of social media platforms generates daily vast amounts of textual data which could potentially serve as a great source of information. Therefore, mining user-generated data for commercial, academic, or other purposes has already attracted the interest of the research community. However, the informal writing which often characterizes online user-generated texts poses a challenge for automatic text processing with Natural Language Processing (NLP) tools. To mitigate the effect of noise in these texts, lexical normalization has been proposed as a preprocessing method which

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5

Bertaglia, Thales Felipe Costa. "Normalização textual de conteúdo gerado por usuário." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-10112017-170919/.

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Conteúdo Gerado por Usuário (CGU) é a denominação dada ao conteúdo criado de forma espontânea por indivíduos comuns, sem vínculos com meios de comunicação. Esse tipo de conteúdo carrega informações valiosas e pode ser explorado por diversas áreas do conhecimento. Muito do CGU é disponibilizado em forma de textos avaliações de produtos, comentários em fóruns sobre filmes e discussões em redes sociais são exemplos. No entanto, a linguagem utilizada em textos de CGU diverge, de várias maneiras, da norma culta da língua, dificultando seu processamento por técnicas de PLN. A linguagem de CGU é for

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BÜCHLER, Marco. "Informationstechnische Aspekte des Historical Text Re-use." Doctoral thesis, Universitätsbibliothek Leipzig, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-108515.

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Gegenstand der Arbeit ----------------------- Was ist Text Re-use? Text Re-use beschreibt die mit unterschiedlichen Absichten mündliche und schriftliche Wiedergabe von Textinhalten. Diese können im Sinne einer Definition das Anerkennen einer Autorität aber auch das Wiedergeben einer besonders interessanten Information sein. Während der Fokus dieser Arbeit auf dem Erstellen eines Hypertextes durch eine Text Re-use Analysis liegt, sind die PageRanking-Technik oder auch bibliometrische Analysen weiterführende Anwendungen. Im Kontext derartiger Einsatzmöglichkeiten kann auf historischen Dokumenten

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7

Applen, John David. "The play of texts in Don DeLillo's "Libra", "Ratner's Star", and "White Noise"." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186812.

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The central concern in my dissertation is how current theories of rhetoric and social construction are made manifest in three of Don DeLillo's novels: Libra, White Noise, and Ratner's Star. Libra demonstrates how the historical figure Lee Harvey Oswald and the events surrounding the assassination of John Kennedy are socially constructed by media imagery and the ambient texts of American culture. White Noise is an extension of Libra in that it details how the discourse of American consumer and political culture construct our sense of self and our relationship to others in our society. Ratner's

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8

Liu, Zelong. "High performance latent dirichlet allocation for text mining." Thesis, Brunel University, 2013. http://bura.brunel.ac.uk/handle/2438/7726.

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Latent Dirichlet Allocation (LDA), a total probability generative model, is a three-tier Bayesian model. LDA computes the latent topic structure of the data and obtains the significant information of documents. However, traditional LDA has several limitations in practical applications. LDA cannot be directly used in classification because it is a non-supervised learning model. It needs to be embedded into appropriate classification algorithms. LDA is a generative model as it normally generates the latent topics in the categories where the target documents do not belong to, producing the deviat

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9

Valentini, Botinhão Cássia. "Intelligibility enhancement of synthetic speech in noise." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/8877.

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Speech technology can facilitate human-machine interaction and create new communication interfaces. Text-To-Speech (TTS) systems provide speech output for dialogue, notification and reading applications as well as personalized voices for people that have lost the use of their own. TTS systems are built to produce synthetic voices that should sound as natural, expressive and intelligible as possible and if necessary be similar to a particular speaker. Although naturalness is an important requirement, providing the correct information in adverse conditions can be crucial to certain applications.

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10

Davidson, Sean Adam. "Detection of tones in reproducible noise: psychophysical and computational studies of stimulus features and processing mechanisms /." Related electronic resource:, 2007. http://proquest.umi.com/pqdweb?did=1342742901&sid=4&Fmt=2&clientId=3739&RQT=309&VName=PQD.

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Chang, Man-si Menzie, and 張汶詩. "Gaps-In-Noise and pitch pattern sequence tests: norms for Mandarin-speaking adolescents." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B44489584.

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12

Nagaraj, Naveen K. "Explaining Listening Comprehension in Noise Using Auditory Working Memory, Attention, and Speech Tests." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1395747714.

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13

Pedroza, Moises. "Automating Telemetry Tracking Systems Operational Tests." International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/606471.

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International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>Automating Telemetry Tracking Systems Operational Readiness Tests is a concept that was introduced at White Sands Missile Range in the early 1980’s. The idea was to determine the condition of a Telemetry Tracking System in a reliable manner in a short time as possible. A series of RF and Servo Tests designed to determine the condition of a Telemetry Tracking System was implemented using HP BASIC. The latest personal computers are faster and have more storage

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14

Ljungberg, Lucas. "Using unsupervised classification with multiple LDA derived models for text generation based on noisy and sensitive data." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-255010.

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Creating models to generate contextual responses to input queries is a difficult problem. It is even more difficult when available data contains noise and sensitive data. Finding models or methods to handle such issues is important in order to use data for productive means.This thesis proposes a model based on a cooperating pair of Topic Models of differing tasks (LDA and GSDMM) in order to alleviate the problematic properties of data. The model is tested on a real-world dataset with these difficulties as well as a dataset without them. The goal is to 1) look at the behaviour of the different

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Meechan-Maddon, Ailsa. "The effect of noise in the training of convolutional neural networks for text summarisation." Thesis, Uppsala universitet, Institutionen för lingvistik och filologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-384607.

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In this thesis, we work towards bridging the gap between two distinct areas: noisy text handling and text summarisation. The overall goal of the paper is to examine the effects of noise in the training of convolutional neural networks for text summarisation, with a view to understanding how to effectively create a noise-robust text-summarisation system. We look specifically at the problem of abstractive text summarisation of noisy data in the context of summarising error-containing documents from automatic speech recognition (ASR) output. We experiment with adding varying levels of noise (erro

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16

Buckley, Katie Hills. "Separating the Signal From the Noise: An Examination of Student and Teacher Scores Based on Student Learning Objectives (SLOs) in One State." Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:16461041.

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Despite the prevalence of student learning objectives (SLOs) in teacher evaluation systems throughout the United States, research on the validity of student and teacher SLO scores used for high-stakes decisions is lacking. For this reason, this dissertation is comprised of two chapters that examine student and teacher-level SLO performance data from select districts in one Race to the Top state. In Chapter 1, I describe the quality of student assessment data and the comparability of student scores across alternative growth targets. I find that in the first year of implementation, assessments f

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Green, Anne Marie. "The Interaction between Working Memory Capacity and Noise on Recall and Recognition of Orally Presented Text." Thesis, University of Gävle, Department of Education and Psychology, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-240.

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<p>The objectives of the present study were 1) to examine the effects of noise exposure on recall and recognition of orally presented text and 2) to examine the relation between working memory capacity and the performance of recall and recognition of orally presented text in noisy conditions. A total of 32 subjects, age 20-33, with no known hearing impairment, were paid to participate in the experiment. The hearing ability of all subjects was tested using recorded sentences with and without background noise. Their working memory capacity was tested using listening span, reading span and operat

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Giboulot, Quentin. "Statistical Steganography based on a Sensor Noise Model using the Processing Pipeline." Thesis, Troyes, 2022. http://www.theses.fr/2022TROY0003.

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La stéganographie est la discipline traitant des techniques visant à dissimuler de l'information dans un média de couverture jugé inoffensif. Dans le cadre de ce manuscrit, les médias de couvertures choisis sont des images JPEG. Les schémas stéganographiques basés sur un modèle statistique d'images naturelles présentent un avantage certain par rapport aux schémas basés sur des heuristiques. En effet, ils fournissent un lien direct entre détectabilité théorique et performances empiriques. Cependant, cet avantage dépend de la précision des modèles sous-jacents. Cette précision était insuffisante

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SILVA, HARRY ARNOLD ANACLETO. "INDEPENDENT TEXT ROBUST SPEAKER RECOGNITION IN THE PRESENCE OF NOISE USING PAC-MFCC AND SUB BAND CLASSIFIERS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2011. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=18212@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>O presente trabalho é proposto o atributo PAC-MFCC operando com Classificadores em Sub-Bandas para a tarefa de identificação de locutor independente do texto em ruído. O sistema proposto é comparado com os atributos MFCC (Coeficientes Cepestrais de Frequência Mel), PAC- MFCC (Fase Autocorrelação-MFCC ) sem uso de classificadores em sub-bandas, SSCH(Histogramas de Centróides de Sub-Bandas Espectrais) e TECC (Coeficientes Cepestrais da Energia Teager). Nesta tarefa de reconhecimento, utilizou-se a base TIMIT a qual é composta de 630

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Khouw, Edward, and 許源豐. "Mandarin dichotic digit test and mainland Mandarin hearing in noise test: normative findings for Mandarin-speaking school age children." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B4448978X.

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21

Santos, Larissa Germiniani dos. "Phrases in Noise Test (PINT): adaptação cultural para o português brasileiro e aplicabilidade na avaliação do sistema de frequência modulada." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/25/25143/tde-02062015-161419/.

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Avaliar as habilidades comunicativas e auditivas de crianças com deficiência auditiva é de extrema importância, visto que é indispensável o acompanhamento do desenvolvimento da audição para verificação e planejamento do processo de (re) habilitação auditiva. No cenário nacional não há teste padronizado para avaliação da percepção da fala no ruído para aplicação em crianças. Este trabalho propõe a adaptação cultural do teste de percepção da fala Phrases in Noise Test (PINT) para a Língua Portuguesa, validação e verificação da sua efetividade na avaliação do Sistema de Frequência Modulada. Fora

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Ekman, Sara. "Automatisk extraktion av nyckelord ur ett kundforum." Thesis, Stockholms universitet, Avdelningen för datorlingvistik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-160686.

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Konversationerna i ett kundforum rör sig över olika ämnen och språket är inkonsekvent. Texterna uppfyller inte de krav som brukar ställas på material inför automatisk nyckelordsextraktion. Uppsatsens undersöker hur nyckelord automatiskt kan extraheras ur ett kundforum trots dessa svårigheter. Fokus i undersökningen ligger på tre aspekter av nyckelordsextraktion. Den första faktorn rör hur den etablerade nyckelordsextraktionsmetoden TF*IDF presterar jämfört med fyra metoder som skapas med hänsyn till materialets ovanliga struktur. Nästa faktor som testas är om olika sätt att räkna ordfrekvens p

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23

Penin, Rémi. "Evaluation à priori des performances environnementales d'un noyau magnétique de transformateur triphasé sur la base de tests simplifiés." Thesis, Artois, 2014. http://www.theses.fr/2014ARTO0209/document.

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Le transformateur est aujourd’hui l’un des convertisseurs statiques les plus utilisé notamment dans la distribution électrique. Les tôles magnétiques servant à la construction de leurs circuits magnétiques sont devenues de plus en plus performantes permettant une réduction des pertes produites. Néanmoins, les tests normalisés permettant de caractériser les tôles magnétiques ne reflètent pas totalement le comportement énergétique du transformateur. De plus, une autre problématique a gagné en importance durant ces dernières années : le bruit acoustique émis. Malheureusement, il n’y pas encore de

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Dias, Laura Lima. "Análise de abordagens automáticas de anotação semântica para textos ruidosos e seus impactos na similaridade entre vídeos." Universidade Federal de Juiz de Fora (UFJF), 2017. https://repositorio.ufjf.br/jspui/handle/ufjf/6473.

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Submitted by Geandra Rodrigues (geandrar@gmail.com) on 2018-01-29T16:52:29Z No. of bitstreams: 0<br>Rejected by Adriana Oliveira (adriana.oliveira@ufjf.edu.br), reason: on 2018-01-30T14:50:12Z (GMT)<br>Submitted by Geandra Rodrigues (geandrar@gmail.com) on 2018-01-30T16:08:06Z No. of bitstreams: 0<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2018-03-21T19:26:08Z (GMT) No. of bitstreams: 0<br>Made available in DSpace on 2018-03-21T19:26:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-08-31<br>CAPES - Coordenação de Aperfeiçoamento de Pess

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Garcia-Patron, Sanchez Raul. "Quantum information with optical continuous variables: from Bell tests to key distribution." Doctoral thesis, Universite Libre de Bruxelles, 2007. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210655.

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In this thesis we have studied different aspects of the novel field of quantum information with continuous variables. The higher efficiency and bandwidth of homodyne detection combined with the easiness of generation and manipulation of Gaussian states makes continuous-variable quantum information a promising and flourishing field of research. This dissertation is divided in two parts. The first part explores two applications of the “photon subtraction” operation; Firstly, a technique to generate highly non-Gaussian single-mode states of light; Secondly, an experimental setup capable of realiz

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Damian, Camilla, Zehra Eksi-Altay, and Rüdiger Frey. "EM algorithm for Markov chains observed via Gaussian noise and point process information: Theory and case studies." De Gruyter, 2018. http://dx.doi.org/10.1515/strm-2017-0021.

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In this paper we study parameter estimation via the Expectation Maximization (EM) algorithm for a continuous-time hidden Markov model with diffusion and point process observation. Inference problems of this type arise for instance in credit risk modelling. A key step in the application of the EM algorithm is the derivation of finite-dimensional filters for the quantities that are needed in the E-Step of the algorithm. In this context we obtain exact, unnormalized and robust filters, and we discuss their numerical implementation. Moreover, we propose several goodness-of-fit tests for hidden Mar

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Paz-Oliveira, Andréa. "Procedimentos e implicações na elaboração de um teste de sentenças no ruído para o português brasileiro." Pontifícia Universidade Católica de São Paulo, 2017. https://tede2.pucsp.br/handle/handle/20317.

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Submitted by Filipe dos Santos (fsantos@pucsp.br) on 2017-08-30T12:55:05Z No. of bitstreams: 1 Andréa Paz-Oliveira.pdf: 1976530 bytes, checksum: 4a5fa3eadd3b24eaae5cb952e5c38cf8 (MD5)<br>Made available in DSpace on 2017-08-30T12:55:05Z (GMT). No. of bitstreams: 1 Andréa Paz-Oliveira.pdf: 1976530 bytes, checksum: 4a5fa3eadd3b24eaae5cb952e5c38cf8 (MD5) Previous issue date: 2017-08-24<br>Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq<br>Introduction: basic audiological field evaluation, syllables and words have been used to measure the individual's auditory

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Park, Jung Chul. "Two essays on market efficiency : tests of idiosyncratic risk: informed trading versus noise and arbitrage risk, and agency costs and the underlying causes of mispricing: information asymmetry versus conflict of interests." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0001944.

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Dissertation (Ph.D.)--University of South Florida, 2007.<br>Document formatted into pages; contains 100 pages. Title from PDF of title page. Includes vita. Includes bibliographical references. Mode of access: World Wide Web.

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Henriques, Marília Oliveira. "LIMIARES E ÍNDICES PERCENTUAIS DE RECONHECIMENTO DE SENTENÇAS NO RUÍDO, EM CAMPO LIVRE, PARA INDIVÍDUOS ADULTOS." Universidade Federal de Santa Maria, 2006. http://repositorio.ufsm.br/handle/1/6519.

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At the same time that the society has the comfort reached by the evolution in technology, it comes across with something bad that comes from the same evolution: the competitive noise and, consequently, the difficulty with the verbal communication. Moreover, complaints made by individuals who are not being able to comprehend speeches in the presence of noise are becoming more frequent at the audiology clinics, independent of the hearing deficit. Thus, facing the need for dimensioning this difficulty and trying to answer questions referring to the recognition of the speech in the noise, the pres

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Eriksson, Tilda. "Change Detection in Telecommunication Data using Time Series Analysis and Statistical Hypothesis Testing." Thesis, Linköpings universitet, Matematiska institutionen, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-94530.

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In the base station system of the GSM mobile network there are a large number of counters tracking the behaviour of the system. When the software of the system is updated, we wish to find out which of the counters that have changed their behaviour. This thesis work has shown that the counter data can be modelled as a stochastic time series with a daily profile and a noise term. The change detection can be done by estimating the daily profile and the variance of the noise term and perform statistical hypothesis tests of whether the mean value and/or the daily profile of the counter data before

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Maia, Juliana Rollo Fernandes. "Estudo da audição de músicos de rock and roll." Pontifícia Universidade Católica de São Paulo, 2006. https://tede2.pucsp.br/handle/handle/12059.

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Made available in DSpace on 2016-04-27T18:12:15Z (GMT). No. of bitstreams: 1 dissertacao.pdf: 416311 bytes, checksum: 6d42df4a4ba3be204ae74895c6628e34 (MD5) Previous issue date: 2006-07-31<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>When we think about music, it is difficult to imagine that it may cause a hearing damage. Nevertheless, when played at high sound pressure levels, music can be harmful to man. Rock and roll is performed in excessive sound pressure levels. Several studies have demonstrated that rock concert s sound levels can range from 100 to 115 dB (A), wit

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Matějíček, Jaroslav. "Generátory náhodných čísel pro kryptografii." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-236519.

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The content of this thesis is the design and statistical tests of two di erent hardware random number generators. It also includes an overview of the sources of entropy, algorithms used to correct deviations from the normal distribution and the description of statistical tests.

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Acevedo, Giraldo Daniel. "Experimental and analytical investigation of the aerodynamic noise emitted by generic distributed electric propulsion wing-propellers configurations." Electronic Thesis or Diss., Ecully, Ecole centrale de Lyon, 2024. http://www.theses.fr/2024ECDL0015.

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Cette thèse étudie expérimentalement et analytiquement les effets d'installation acoustiques d'une paire d’hélices subsoniques de six pales installées côte à côte et près du bord de fuite d’une aile. Dans une gamme importante de basses et moyennes fréquences, le diamètre des hélices, la corde de l'aile et la distance aile-hélice sont plus petites que les longueurs d'onde acoustiques, atteignant un régime compact. Cette configuration générique imite les futures architectures d'avions urbains à propulsion électrique distribuée, adressée dans le cadre du projet H2020 de l’Union européenne ENODISE

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Bouraoui, Jihene. "The power of negativity and its functioning in the metafictional text through five works : vladimir Nabokov’s Pale Fire, John Barth’s Coming Soon!!!, Graham Swift’s Waterland, Robert Coover’s Gerald’s Party and Don DeLillo’s White Noise." Thesis, Paris 10, 2012. http://www.theses.fr/2012PA100139.

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La thèse se donne comme objectif l’appréhension des catégories de la négativité dans le texte métafictionnel en tant qu’une force libératrice et transformatrice qui, à la fois, assure la survie du texte malgré son aspect fragmentaire et multidirectionnel, et pousse le lecteur à s’engager dans une quête de l’insensé et du paradoxal qui n’embarque pas sur le nihilisme ‘négatif’, mais aboutit plutôt à la découverte de la face cachée constructive de la négativité, qu’est l’autocréation. Pour mener un tel projet, un assemblage littéraire de cinq œuvres disparates- Pale Fire par Vladimir Nabokov, Co

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Do, Thanh Ha. "Sparse representations over learned dictionary for document analysis." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0021/document.

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Dans cette thèse, nous nous concentrons sur comment les représentations parcimonieuses peuvent aider à augmenter les performances pour réduire le bruit, extraire des régions de texte, reconnaissance des formes et localiser des symboles dans des documents graphiques. Pour ce faire, tout d'abord, nous donnons une synthèse des représentations parcimonieuses et ses applications en traitement d'images. Ensuite, nous présentons notre motivation pour l'utilisation de dictionnaires d'apprentissage avec des algorithmes efficaces pour les construire. Après avoir décrit l'idée générale des représentation

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Arieta, Aline de Moraes 1981. "HINT Brasil : estudo em portadores de perdas auditivas." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/309221.

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Orientadores: Everardo Andrade da Costa, Christiane Marques do Couto<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas<br>Made available in DSpace on 2018-08-22T10:10:32Z (GMT). No. of bitstreams: 1 Arieta_AlinedeMoraes_D.pdf: 1729442 bytes, checksum: 2887ecc98db30769bd998782cb6716d0 (MD5) Previous issue date: 2013<br>Resumo: A investigação do reconhecimento da fala na presença de ruído competidor, em situações de escuta assemelhadas às do dia a dia, torna-se cada vez mais necessária. Atualmente, na rotina audiológica nacional, esta avaliação ainda é real

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Hizli, Cem. "Thermal Optimization of Veo+ Projectors (thesis work at Optea AB) : Trying to reduce noise of the Veo+ projector by DOE (Design of Experiment) tests to find anoptimal solution for the fan algorithm while considering the thermal specifics of the unit." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-10382.

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The Veo+ projector is using a cooling system that consists of fan and blowers. This system is cooling the electronic components of the device and the lamp of the projector, however extracting a high noise. To lower this noise the rpm speeds (rotational speed) of the fan and blowers should be decreased. Thus, lowering the speed will result in higher temperature values in whole system (inside the device). While lowering the speed, the higher temperature values should be kept within the thermal design specifications of the electronic components. The purpose of this thesis work is to find an optim

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Silva, Gustavo Rodrigues da. "Caracterização magnética de aço com a superfície endurecida." reponame:Repositório Institucional da UCS, 2010. https://repositorio.ucs.br/handle/11338/569.

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Neste trabalho foram investigadas as propriedades magnéticas (curva de histerese e ruído Barkhausen) de alguns aços (ABNT 1045, 1050 e 1548) cujas superfícies foram endurecidas por indução. O objetivo era de desenvolver um ensaio não-destrutivo para determinar a espessura da camada endurecida, assim evitando a necessidade de realizar medidas (destrutivas) de microdureza. Medidas da susceptibilidade magnética mostraram um pico (ferrita) em torno de 800 A/m e outro (martensita) em torno de 3500 A/m. Assim procuramos correlacionar a amplitude do pico de ferrita com a espessura da camada dura na s

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Svedberg, Jonatan, and George Shmas. "Effekten av textaugmenteringsstrategier på träffsäkerhet, F1-värde och viktat F1-värde." Thesis, KTH, Hälsoinformatik och logistik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-296550.

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Att utveckla en sofistikerad chatbotlösning kräver stora mängder textdata för att kunna anpassalösningen till en specifik domän. Att manuellt skapa en komplett uppsättning textdata, specialanpassat för den givna domänen och innehållandes ett stort antal varierande meningar som en människa kan tänkas yttra, är ett enormt tidskrävande arbete. För att kringgå detta tillämpas dataaugmentering för att generera mer data utifrån en mindre uppsättning redan existerande textdata. Softronic AB vill undersöka alternativa strategier för dataaugmentering med målet att eventuellt ersätta den nuvarande lösni

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Sulis, Sophia. "Méthodes statistiques utilisant des simulations hydrodynamiques d'atmosphères stellaires pour détecter des exoplanètes en vitesse radiale." Thesis, Université Côte d'Azur (ComUE), 2017. http://www.theses.fr/2017AZUR4073/document.

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Considérant une série temporelle affectée par un bruit coloré dont les propriétés statistiques sont inconnues, la difficulté pour la détection de signaux périodiques est de contrôler le degré de confiance avec lequel les tests de détection rejettent l'hypothèse nulle en faveur de l'hypothèse alternative. L'objectif de cette thèse est de développer une nouvelle méthode utilisant des séries temporelles simulées du bruit pour améliorer ce contrôle. Dans le cas d'un échantillonnage régulier, nous avons analysé les performances de différents tests de détection appliqués à un périodogramme standardi

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Do, Thanh Ha. "Sparse representations over learned dictionary for document analysis." Electronic Thesis or Diss., Université de Lorraine, 2014. http://www.theses.fr/2014LORR0021.

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Dans cette thèse, nous nous concentrons sur comment les représentations parcimonieuses peuvent aider à augmenter les performances pour réduire le bruit, extraire des régions de texte, reconnaissance des formes et localiser des symboles dans des documents graphiques. Pour ce faire, tout d'abord, nous donnons une synthèse des représentations parcimonieuses et ses applications en traitement d'images. Ensuite, nous présentons notre motivation pour l'utilisation de dictionnaires d'apprentissage avec des algorithmes efficaces pour les construire. Après avoir décrit l'idée générale des représentation

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Sury, Charlotte. "Localisation et évolution des sources de bruit en basses fréquences de HEMTs GaN sous contraintes électriques." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14245/document.

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Les HEMT à base de nitrure de gallium sont des composants très prometteurs en termes de performances en puissance et de fréquence de travail. L'enjeu est donc de développer des technologies performantes et fiables, afin d'intégrer ces transistors aux systèmes hyperfréquences, notamment dans le domaine des télécommunications, et en milieu durci. Les travaux ont été focalisés sur l'étude de la localisation des sources de bruit en excès aux basses fréquences, et de leur évolution suite aux phases de tests de vieillissement accéléré. Les caractérisations électriques ont été réalisées sur des struc

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Pujol, Sophie. "Le bruit environnemental en milieu urbain : exposition d'une population d'enfants et performances scolaires." Thesis, Besançon, 2012. http://www.theses.fr/2012BESA3018/document.

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La relation entre exposition sonore environnementale et performance scolaire a été étudiée auprès des 900 élèves scolarisés en CE2 en 2006-2007 dans les écoles publiques de la ville de Besançon (120 000 habitants). Un questionnaire, complété par les familles de 724 élèves a permis de localiser les habitations et recueillir les facteurs associés à leur réussite ou échec scolaire.L'exposition sonore de cette population a été évaluée par deux approches complémentaires : une campagne de mesure, conduite au domicile de 44 enfants pendant 8 jours consécutifs (niveaux sonores intra- et extra-domicili

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Moro, Lorenzo. "Structure borne noise due to marine diesel engines: experimental study and numerical simulation for the prediction of the dynamic behaviour of resilient mounts." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/11114.

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2013/2014<br>Gli alti livelli di comfort che sono richiesti oggigiorno a bordo di navi da crociera e mega-yachts, portano i progettisti a concentrare la loro attenzione sul problema del rumore strutturale. I motori diesel quattro tempi che sono installati a bordo nave come motori principali o diesel generatori, sono tra le principali sorgenti di rumore strutturale. Per questa ragione, al fine di ridurre l’energia vibrazionale generata da queste sorgenti e trasmessa, tramite le strutture nave, ai locali alloggio, i motori diesel sono sospesi mediante elementi resilienti. Tali elementi resilient

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Pelikán, Luděk. "Měření částečných výbojů u vysokonapěťových kabelů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-376964.

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The main topic of this work is the analysis of the measurement of partial discharge measurements on high voltage cables. The thesis also deals with other measurements, including the measurement of the loss factor and the voltage retention and breakdown test. Part of the text describes the issue of partial discharge, its measurement by galvanic method and methods of elimination of disturbing influences that affect this method in terms of sensitivity and accuracy of the measured values. Thesis also describes the construction of the cables, their marking and the tests carried out on them. There i

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Maigrot, Philéas. "Compréhension des mécanismes perceptifs associés à la gêne due aux bruit et vibrations du trafic ferroviaire en zone urbaine." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI051.

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La co-exposition au bruit et aux vibrations est source de gêne pour les riverains et peut engendrer des troubles de la santé. L’objectif de la thèse est d’apporter des éléments de compréhension au regard des phénomènes perceptifs mis en jeux lors de l’exposition combinée au bruit et aux vibrations ferroviaires. Des expériences sont menées dans ce but, en conditions contrôlées et à l'aide d'enregistrements acoustiques et vibratoires réalisés à proximité d'une voie ferrée, à l'intérieur d'un logement. Une première étude a été réalisée afin de valider un protocole expérimental permettant de recue

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Carvalho, Eduardo Alves de. "SegmentaÃÃo de imagens de radar de abertura sintÃtica por crescimento e fusÃo estatÃstica de regiÃes." Universidade Federal do CearÃ, 2005. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=2038.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>A cobertura regular de quase todo o planeta por sistemas de radar de abertura sintÃtica (synthetic aperture radar - SAR) orbitais e o uso de sistemas aerotransportados tÃm propiciado novos meios para obter informaÃÃes atravÃs do sensoriamento remoto de vÃrias regiÃes de nosso planeta, muitas delas inacessÃveis. Este trabalho trata do processamento de imagens digitais geradas por radar de abertura sintÃtica, especificamente da segmentaÃÃo, que consiste do isolamento ou particionamento dos objetos relevantes presentes em uma cena.

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Vitto, Ursula Maria Lellis de. "Efeito nas mudanças temporárias dos limiares auditivos durante o uso de próteses auditivas de alta potência." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/5/5160/tde-14102014-113516/.

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Alterações temporárias ou permanentes na audição podem ser encontradas nas orelhas submetidas a níveis elevados de pressão sonora. As mudanças temporárias induzidas nas orelhas protetizadas, quando estimuladas por suas próteses auditivas ajustadas na amplificação prescrita, foram avaliadas em um grupo de 25 pacientes após um período controlado (2 a 2 ½ h) de exposição ao ruído presente em um ambiente acústico comum. O estudo foi dividido em três etapas. Uma medida inicial foi realizada na primeira etapa para mensurar a magnitude das mudanças temporárias dos limiares auditivos, induzidas nas 42

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Terz, Marek. "Databáze akustických nahrávek." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217314.

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The databsae of accoustical recordings is a web-based application, which is accessible with an usual web browser. There were used technologies, that are ussually used in web applications. This ensures, that the application is open for using by wide range of users. The application enables uploading WAWE files to the server and allows the user to add various description of the recordings. The application allows also comparing the quality of recordings, which were processed with some method for highlighting the accoustical signal from noise. This function is established by listening tests, which

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Esstafa, Youssef. "Modèles de séries temporelles à mémoire longue avec innovations dépendantes." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCD021.

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Dans cette thèse nous considérons, dans un premier temps, le problème de l'analyse statistique des modèles FARIMA (Fractionally AutoRegressive Integrated Moving-Average) induits par un bruit blanc non corrélé mais qui peut contenir des dépendances non linéaires très générales. Ces modèles sont appelés FARIMA faibles et permettent de modéliser des processus à mémoire longue présentant des dynamiques non linéaires, de structures souvent non-identifiées, très générales. Relâcher l'hypothèse d'indépendance sur le terme d'erreur, une hypothèse habituellement imposée dans la littérature, permet aux

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