Log in

Relevant bibliographies by topics / Spectrogram / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Spectrogram.

Dissertations / Theses on the topic 'Spectrogram'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Spectrogram.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Lampert, Thomas. "Spectrogram track detection : an active contour algorithm." Thesis, University of York, 2010. http://etheses.whiterose.ac.uk/956/.

Full text

Abstract:

In many areas of science, near-periodic phenomena represent important information within time-series data. This thesis takes the example of the detection of non-transitory frequency components in passive sonar data, a problem which finds many applications. This problem is typically transformed into the pattern recognition domain by representing the time-series data as a spectrogram, in which slowly varying periodic signals appear as curvilinear tracks. The research is initiated with a survey of the literature, which is focused upon research into the detection of tracks within spectrograms. An

APA, Harvard, Vancouver, ISO, and other styles

2

Behr, Michael K. "State-space multitaper spectrogram algorithms : theory and applications." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/107033.

Full text

Abstract:

Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 63-67).<br>I present the state-space multitaper approach for analyzing non-stationary time series. Nonstationary time series are commonly divided into small time windows for analysis, but existing methods lose predictive pow

APA, Harvard, Vancouver, ISO, and other styles

3

Hansen, Vedal Amund. "Unsupervised Audio Spectrogram Compression using Vector Quantized Autoencoders." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264947.

Full text

Abstract:

Despite the recent successes of neural networks in a variety of domains, musical audio modeling is still considered a hard task, with features typically spanning tens of thousands of dimensions in input space. By formulating audio data compression as an unsupervised learning task, this project investigates the applicability of vector quantized neural network autoencoders for compressing spectrograms – image-like representations of audio. Using a recently proposed gradient-based method for approximating waveforms from reconstructed (real-valued) spectrograms, the discrete pipeline produces list

APA, Harvard, Vancouver, ISO, and other styles

4

Kotte, Timo Oliver. "Application of Image Processing Techniques for Lamb Wave Characterization." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4787.

Full text

Abstract:

Characterization of dispersion curves in plate-like structures is possible with guided Lamb waves. In this research, experimental development of dispersion curves relies on the spectrogram, which suffers from the Heisenberg Uncertainty Principle. Reassignment is capable of localizing ill--defined dispersion curves. Unfortunately, reassignment also introduces spurious components, which reduce reassignment performance. This research develops an algorithm that provides both localization of dispersion curves and elimination of spurious components. To achieve this, an alternative formulation of rea

APA, Harvard, Vancouver, ISO, and other styles

5

Lamel, Lori Faith. "Formalizing knowledge used in spectrogram reading : acoustic and perceptual evidence from stops." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14780.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Bleakley, Steven Shea, and steven bleakley@qr com au. "Time Frequency Analysis of Railway Wagon Body Accelerations for a Low-Power Autonomous Device." Central Queensland University, 2006. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20070622.121515.

Full text

Abstract:

This thesis examines the application of the techniques of Fourier spectrogram and wavelet analysis to a low power embedded microprocessor application in a novel railway and rollingstock monitoring system. The safe and cost effective operation of freight railways is limited by the dynamic performance of wagons running on track. A monitoring system has been proposed comprising of low cost wireless sensing devices, dubbed Health Cards, to be installed on every wagon in the fleet. When marshalled into a train, the devices would sense accelerations and communicate via radio network to a master

APA, Harvard, Vancouver, ISO, and other styles

7

Tsiappoutas, Kyriakos Michael. "Byzantine Music Intervals: An Experimental Signal Processing Approach." ScholarWorks@UNO, 2004. http://scholarworks.uno.edu/td/470.

Full text

Abstract:

We used a Byzantine Music piece performed by a well recognized chanter in order to derive experimentally the mean frequencies of the first five tones (D – A) of the diatonic scale of Byzantine Music. Then we compared the experimentally derived frequencies with frequencies proposed by two theoretical scales, both representative of traditional Byzantine Music chanting. We found that if a scale is performed by a traditional chanter is very close in frequency to the frequencies proposed theoretically. We then determined an allowed frequency deviation from the mean frequencies for each tone. The co

APA, Harvard, Vancouver, ISO, and other styles

8

Dias, Fábio Felix. "Uma estratégia para análise visual de Paisagens Acústicas com base em seleção de características discriminantes." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-29102018-172305/.

Full text

Abstract:

O crescimento do volume de dados ocasionado pelo desenvolvimento tecnológico atual, tem sido fortemente evocado como premissa para a utilização de técnicas que auxiliem a exploração, análise e entendimento desses dados. Um conjunto dessas técnicas está compreendido na área de Visualização de Dados, que proporciona maneiras visuais de identificar padrões e tendências, além de extrair características obscuras dos dados. Tais abordagens podem ser aplicadas a qualquer problema que culmine na análise de dados. Um desses problemas é a utilização do som como ferramenta para descrever as característic

APA, Harvard, Vancouver, ISO, and other styles

9

Kalm, Helen. "Acoustic Soil-Rock Probing : A Case Study in Gubbängen." Thesis, KTH, Jord- och bergmekanik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-256081.

Full text

Abstract:

Soil-rock probing (Jb-probing) is the most common probing method in Sweden. Due to the penetration capacity of the Jb-probing it can be performed in both soil and rock. However, the capacity also results in inherent limitations and uncertainties, such as the difficulty identifying the soil layer sequences of soft soils. In order to attain a more detailed soil layer sequence it is necessary to perform complementary probing and sampling methods, an inefficient and consequently costly procedure. By instead implementing non-interfering complementary methods performed simultaneously as the Jb-probi

APA, Harvard, Vancouver, ISO, and other styles

10

Lacko, Tomáš. "Akustická simulace jedoucího automobilu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218916.

Full text

Abstract:

This project includes an overview of different processing methods phonograms. It focuses primarily on time - frequency analysis carried out using Fast Fourier Transform (STFT). The main essence is to evaluate the time - frequency analysis of recorded motor vehicle, driving at different options, together with an analysis of driver activity in these variants. Based on the results of the analysis deals with the creation of synthetic audio signals of motor vehicle records. Further addresses the creation of the program for acoustic simulation engine is running smoothly when driving a car. Processin

APA, Harvard, Vancouver, ISO, and other styles

11

Nerušil, Václav. "Vyhledávání CpG ostrůvků z DNA sekvencí." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221308.

Full text

Abstract:

This thesis focuses on searching for CpG islands of DNA sequences based on analysis of DNA spectrograms. The first part is theoretical and deals with the significance CpG island, and a description of the algorithms that are used or have been proposed for their search. The theoretical basis were implemented two algorithms based on the analysis of DNA spectrogram. One is based on the assumption that the region CpG islands has a higher content of guanine and cytosine than the region outside the CpG island and the other on the assumption of a higher frequency of occurrence of CG dinucleotides in t

APA, Harvard, Vancouver, ISO, and other styles

12

Im, Jinhyeok. "Numerical analysis of spectrograms in attosecond photoionisation." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP175.

Full text

Abstract:

Depuis leur première observation au début des années 2000, les impulsions lumineuses attosecondes (1 as = 10^-18 s) dans le domaine de l'ultraviolet extrême (XUV) ont révolutionné l'étude de la dynamique électronique dans les atomes et les molécules. La spectroscopie attoseconde basée sur la photoionisation assistée par laser a permis d'observer des processus ultrarapides tels que les délais temporels dans l'effet photoélectrique. Cette approche consiste à mesurer l'énergie cinétique des photoélectrons émis lors de l'ionisation d'atomes ou de molécules par une impulsion attoseconde combinée à

APA, Harvard, Vancouver, ISO, and other styles

13

Loeffler, Dominik B. "Instrument Timbres and Pitch Estimation in Polyphonic Music." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10568.

Full text

Abstract:

In the past decade, the availability of digitally encoded, downloadable music has increased dramatically, pushed mainly by the release of the now famous MP3 compression format (Fraunhofer-Gesellschaft, 1994). Online sales of music in the US doubled in 2005, according to a recent news article (*), while the number of files exchanged on P2P platforms is much higher, but hard to estimate. The existing and coming informational flood in digital music prompts the need for sophisticated content-based information retrieval. Query-by-Humming is a prototypical technique aimed at locating pieces of mus

APA, Harvard, Vancouver, ISO, and other styles

14

Cavusoglu, Mustafa. "An Efficient And Fast Method Of Snore Detection For Sleep Disorder Investigation." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608236/index.pdf.

Full text

Abstract:

Snores are breath sounds that most people produce during sleep and they are reported to be a risk factor for various sleep disorders, such as obstructive sleep apnea syndrome (OSAS). Diagnosis of sleep disorders relies on the expertise of the clinician that inspects whole night polysomnography recordings. This inspection is time consuming and uncomfortable for the patient. There are surgical and therapeutic treatments. However, evaluation of the success of these methods also relies on subjective criteria and the expertise of the clinician. Thus, there is a strong need for a tool to analyze the

APA, Harvard, Vancouver, ISO, and other styles

15

Yang, Wu. "Traffic Surveillance Using Low Cost Continuous Wave (CW) Doppler Radars." Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1347404224.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Hliboký, Samuel. "Studie nestacionárních jevů čerpadla v turbínovém režimu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444276.

Full text

Abstract:

This diploma thesis deals with centrifugal pump running as a turbine. Basic working principles of a pump are included, both in pump and turbine regime. Experimental data obtained from laboratory test bed are compared with CFD simulation on slightly simplified geometry. Obtained results are then processed using spectrogram. Influence of time step and mesh size on results is also researched.

APA, Harvard, Vancouver, ISO, and other styles

17

Bergström, Joakim. "Transfer Learning on Ultrasound Spectrograms of Weld Joints for Predictive Maintenance." Thesis, Uppsala universitet, Signaler och system, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-424726.

Full text

Abstract:

A big hurdle for many companies to start using machine learning is that trending techniques need a huge amount of structured data. One potential way to reduce the need for data is taking advantage of previous knowledge from a related task. This is so called transfer learning. A basic description of it would be when you take a model trained on existing data and reuse that for another problem. The purpose of this master thesis is to investigate if transfer learning can reduce the need for data when faced with a new machine learning task which is, in particular, to use transfer learning on ultras

APA, Harvard, Vancouver, ISO, and other styles

18

Tiger, Mattias. "Sparse Linear Modeling of Speech from EEG." Thesis, Linköpings universitet, Reglerteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-108048.

Full text

Abstract:

For people with hearing impairments, attending to a single speaker in a multi-talker background can be very difficult and something which the current hearing aids can barely help with. Recent studies have shown that the audio stream a human focuses on can be found among the surrounding audio streams, using EEG and linear models. With this rises the possibility of using EEG to unconsciously control future hearing aids such that the attuned sounds get enhanced, while the rest are damped. For such hearing aids to be useful for every day usage it better be using something other than a motion sensi

APA, Harvard, Vancouver, ISO, and other styles

19

Yao, Bing. "ANALYSIS OF ELECTRICAL AND MAGNETIC BIO-SIGNALS ASSOCIATED WITH MOTOR PERFORMANCE AND FATIGUE." Case Western Reserve University School of Graduate Studies / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=case1140813534.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Mateus, Gustavo Daniel Pedro. "Relatório da prática de ensino supervisionada realizada na Escola de Música do Orfeão de Leiria - Adequação e enquadramento do uso de palhetas sintéticas no ensino do saxofone." Master's thesis, Universidade de Évora, 2021. http://hdl.handle.net/10174/29092.

Full text

Abstract:

O presente relatório de estágio está divido em duas secções. A primeira aborda a realização do estágio na Escola de Música do Orfeão de Leiria – Conservatório de Artes, com o professor cooperante Nuno Mendes ao longo do ano letivo 2018/2019. A segunda parte deste relatório expõe a investigação, realizada ao longo da Prática de Ensino Supervisionada, sobre a utilização de palhetas sintéticas no ensino do saxofone. Inserido na família dos sopros de madeira, o saxofone retém uma série de problemáticas ligadas à sua ferramenta de produção de som, que mais comummente é a palheta feita de cana. Atua

APA, Harvard, Vancouver, ISO, and other styles

21

Резчиков, С. Е., та В. А. Сергеев. "Генератор НЧ-шума с независимой регулировкой показателя формы спектра в двух поддиапазонах". Thesis, Сумский государственный университет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/65294.

Full text

Abstract:

Низкочастотный (НЧ) шум (фликкер-шум, избыточный шум) присутствует во всех типах полупроводниковых приборов (ППП). Зависимость его спектральной плотности мощности (СПМ) от частоты имеет вид 1/fγ, где γ - показатель формы спектра. При измерении параметров НЧ-шума методом сравнения необходим генератор шума. Большинство серийных генераторов являются генераторами белого шума, в редких случаях – генераторами шума со спектром вида 1/f (т. е. с γ = 1).

APA, Harvard, Vancouver, ISO, and other styles

22

Kubánková, Anna. "Automatická klasifikace digitálních modulací." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-233424.

Full text

Abstract:

This dissertation thesis deals with a new method for digital modulation recognition. The history and present state of the topic is summarized in the introduction. Present methods together with their characteristic properties are described. The recognition by means of artificial neural is presented in more detail. After setting the objective of the dissertation thesis, the digital modulations that were chosen for recognition are described theoretically. The modulations FSK, MSK, BPSK, QPSK, and QAM-16 are concerned. These modulations are mostly used in modern communication systems. The method d

APA, Harvard, Vancouver, ISO, and other styles

23

DAK, HAZIRBABA YILDIZ. "IMAGE-BASED MODELING AND PREDICTION OF NON-STATIONARY GROUND MOTIONS." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/dissertations/1008.

Full text

Abstract:

Nonlinear dynamic analysis is a required step in seismic performance evaluation of many structures. Performing such an analysis requires input ground motions, which are often obtained through simulations, due to the lack of sufficient records representing a given scenario. As seismic ground motions are characterized by time-varying amplitude and frequency content, and the response of nonlinear structures is sensitive to the temporal variations in the seismic energy input, ground motion non-stationarities should be taken into account in simulations. This paper describes a nonparametric approach

APA, Harvard, Vancouver, ISO, and other styles

24

Krejčí, Michal. "Fourierova transformace a spektrogramy v analýze DNA sekvencí." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219249.

Full text

Abstract:

Various methods of DNA sequences modifications for frequency analysis and basic characteristics of DNA are described in the theoretical part of this thesis. Tricolor spectrograms, created by short time Fourier transform help us to recognize some characteristic patterns in DNA sequences. Practical part of this work deals with developed programme which generates spectrograms and analyse them. Last part deals with the analysis of selected sequences of C. elegans genome. Some patterns are related to data of public databases such as NCBI. Various patterns are explained from the biological nature, w

APA, Harvard, Vancouver, ISO, and other styles

25

Postránecká, Tereza. "Porovnání metod pro konstrukci barevných DNA spektrogramů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220019.

Full text

Abstract:

This thesis discusses about possibilities of construction colour DNA spectrograms and about patterns which can be detected there. Spectrograms as tools of spectral analysis give us a simultaneous view of the local frequency throughout the nucleotide sequence. They are suitable for gene identification or gene regions identification, determination of global character about whole chromosomes and also give us a chance for the discovery of yet unknown regions of potential significance. For purpose of this kind of DNA analysis is possible to use digital signal processing methods. We can apply them o

APA, Harvard, Vancouver, ISO, and other styles

26

Bardauskas, Justinas. "Kalbos atpažinimas kompiuteriu." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2012~D_20140704_172117-57906.

Full text

Abstract:

This work focuses on speech recognition by computer, pattern recognition stages and problems. Also there is a goal to create a speech recognition tool. At the beginning, there is a general overview of the audio signal and language concepts. The subsequent presentation of the essential tasks of speech recognition, introduction to matrix algebra, which is used to described algorithm. Information is provided on what basis and how features are extracted. For this work often is used LPC. This algorithm is one of the most popular extracting features of speech signal, so it is reviewed in this paper,

APA, Harvard, Vancouver, ISO, and other styles

27

Johansson, Jimmy. "Evaluation of CNN in ESM Data Classification by Perspective of Military Utility." Thesis, Försvarshögskolan, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-9140.

Full text

Abstract:

Modern society has seen an increase in automation using AI in a variety of applications. To keep up with recent development, it is therefore logical to investigate the application of AI programs to military tasks. The great advantage with automation lies in the possible increase in efficiency and possible relocation of resources of personnel to other tasks. Therefore, this study aims to evaluate the use of Convolutional Neural Networks (CNN) in classification of communication and radar emitters based on collected Electronic Support Measures (ESM) data and to estimate to what extent human analy

APA, Harvard, Vancouver, ISO, and other styles

28

Rodrigues, Sonia Luiz. "Comparação da atenuação da radiação solar e dos fatores que determinam o clima de radiação solar subaquática em lagos e reservatórios do Brasil." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/18/18139/tde-23092003-112001/.

Full text

Abstract:

O estudo da penetração da radiação solar no meio aquático foi desenvolvido em quatro partes. Na primeira delas, voltada para a atenuação da radiação solar na coluna dágua, foram discutidos fatores de interferência e suas inter-relações. Neste sentido, foi feita uma comparação da penetração da radiação solar em ecossistemas continentais naturais e artificiais, analisando as diferenças e similaridades. O estudo comparativo da atenuação da radiação solar subaquática em toda extensão de reservatórios constituiu a segunda parte deste trabalho. A comparação foi feita entre reservatórios que aprese

APA, Harvard, Vancouver, ISO, and other styles

29

Rae, Rebecca C. "Measures of Voice Onset Time: A Methodological Study." Bowling Green State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1522356095329958.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Ujihara, Rintaro. "Multi-objective optimization for model selection in music classification." Thesis, KTH, Optimeringslära och systemteori, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298370.

Full text

Abstract:

With the breakthrough of machine learning techniques, the research concerning music emotion classification has been getting notable progress combining various audio features and state-of-the-art machine learning models. Still, it is known that the way to preprocess music samples and to choose which machine classification algorithm to use depends on data sets and the objective of each project work. The collaborating company of this thesis, Ichigoichie AB, is currently developing a system to categorize music data into positive/negative classes. To enhance the accuracy of the existing system, thi

APA, Harvard, Vancouver, ISO, and other styles

31

Romero-García, Gonzalo. "Mathematical Morphology for the Analysis and Generation of Time-Frequency Representations of Music." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS554.

Full text

Abstract:

Cette thèse explore l'application de la Morphologie Mathématique à l'analyse et la génération de musique, en se concentrant sur deux représentations en temps-fréquence : les spectrogrammes et les piano rolls. La morphologie mathématique est un outil de traitement des images non linéaire qui sert à considérer des notions topologiques de l'image. Nous présentons trois applications. La première est d'analyser des spectrogrammes avec des outils morphologiques pour obtenir des paramètres avec lesquels synthétiser un son d'instrument de musique. La deuxième est de générer des piano rolls avec deux p

APA, Harvard, Vancouver, ISO, and other styles

32

Kapryn, Russell Paul. "L2 LEARNERS AND THE INTELLIGIBLITY OF THE BOSTONIAN AND CALIFORNIAN ACCENTS." CSUSB ScholarWorks, 2019. https://scholarworks.lib.csusb.edu/etd/790.

Full text

Abstract:

This thesis investigates issues of intelligibility through the lens and focus of prosody when the Bostonian and Los Angeles-based accents are heard in casually occurring conversation by native and non-native speakers. Over the spring and summer of 2017, six native speakers and 11 non-native speakers of English were interviewed from having listened to two 2.5 minute audio sample clips of speakers who have these accents. Respondents were asked questions such as what was difficult or easy or whether they could summarize the recordings for me. Findings indicate that while the native speakers often

APA, Harvard, Vancouver, ISO, and other styles

33

Tyas, Luke Martin Graham. "The SALT HRS Spectrograph." Thesis, Durham University, 2012. http://etheses.dur.ac.uk/3492/.

Full text

Abstract:

SALT HRS (Southern African Large Telescope High Resolution Échelle Spectrograph) is a high-resolution, high-efficiency spectrograph for the 11m SALT telescope in Sutherland, South Africa. The initial optical design work was performed at the University of Canterbury, New Zealand. Revisions to the concept, the mechanical design, manufacture, assembly and testing have been handled by the Centre for Advanced Instrumentation, at Durham University in the United Kingdom. SALT HRS is a fibre-fed echelle grating spectrograph with four operational modes: low-, medium- and high-resolution and high-stabi

APA, Harvard, Vancouver, ISO, and other styles

34

Rajagopalan, Satish. "Detection of Rotor and Load Faults in BLDC Motors Operating Under Stationary and Non-Stationary Conditions." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11524.

Full text

Abstract:

Brushless Direct Current (BLDC) motors are one of the motor types rapidly gaining popularity. BLDC motors are being increasingly used in critical high performance industries such as appliances, automotive, aerospace, consumer, medical, industrial automation equipment and instrumentation. Fault detection and condition monitoring of BLDC machines is therefore assuming a new importance. The objective of this research is to advance the field of rotor and load fault diagnosis in BLDC machines operating in a variety of operating conditions ranging from constant speed to continuous transient operat

APA, Harvard, Vancouver, ISO, and other styles

35

Vidal, Rosemeire Cardozo. "Algoritmo para estimar gravidade de DPOC através de sinais acústicos." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-11072017-151033/.

Full text

Abstract:

O presente estudo tem como objetivo determinar se a gravidade da DPOC poderá ser estimada através da área do gráfico das intensidades sonoras dos sons respiratórios de pacientes com DPOC. O estudo realizado com 51 pacientes com DPOC leve, moderado, grave, muito grave e 7 indivíduos saudáveis não fumantes. Os sons respiratórios de cada participante, foram coletados através de estetoscópio adaptado com um mini microfone. O método compara as áreas das intensidades sonoras em função da frequência de pacientes de DPOC e indivíduos saudáveis. Neste contexto, para atender ao objetivo, um método foi p

APA, Harvard, Vancouver, ISO, and other styles

36

Jemâa, Imen. "Suivi de formants par analyse en multirésolution." Thesis, Université de Lorraine, 2013. http://www.theses.fr/2013LORR0026/document.

Full text

Abstract:

Nos travaux de recherches présentés dans ce manuscrit ont pour objectif, l'optimisation des performances des algorithmes de suivi des formants. Pour ce faire, nous avons commencé par l'analyse des différentes techniques existantes utilisées dans le suivi automatique des formants. Cette analyse nous a permis de constater que l'estimation automatique des formants reste délicate malgré l'emploi de diverses techniques complexes. Vue la non disponibilité des bases de données de référence en langue arabe, nous avons élaboré un corpus phonétiquement équilibré en langue arabe tout en élaborant un étiq

APA, Harvard, Vancouver, ISO, and other styles

37

Campbell, Richard S. "Development and integration of the NPS middle ultraviolet spectrograph with an extreme ultraviolet spectrograph." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/26983.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Burchill, William Carleton University Dissertation Engineering Electrical. "A novel speech spectrograph system." Ottawa, 1985.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

39

Oliveira, Marlice Fernandes de. "Estudo da separação entre voz patológica e normal por meio da avaliação da energia global do sinal de voz." Universidade Federal de Uberlândia, 2007. https://repositorio.ufu.br/handle/123456789/14661.

Full text

Abstract:

Voice analysis is an important tool in the diagnosis of laryngeal disorders. Among distinct signal processing techniques employed for voice analysis, the spectrogram is commonly used, as it allows for a visualization of the variation of the energy of the signal as a function of the both time and frequency. In this context, this study investigates the use of the global energy of the voice signal, estimated through the spectrogram, as a tool for discrimination between signals obtained from healthy and pathological subjects. This research has also exploited the potential use of the global energy

APA, Harvard, Vancouver, ISO, and other styles

40

Aikio, Mauri. "Hyperspectral prism-grating-prism imaging spectrograph /." Espoo [Finland] : Technical Research Centre of Finland, 2001. http://www.vtt.fi/inf/pdf/publications/2001/P435.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Mollet, Yves. "Fault-tolerance and noise and vibration aspects of electrical drives: Application to wind turbines and electrical vehicle traction." Doctoral thesis, Universite Libre de Bruxelles, 2017. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/260381.

Full text

Abstract:

The awareness of the human responsibility in global warming has led to various private and public initiatives to reduce the emission of greenhouse gases, up to international level. In this context the development of renewable technologies in two sectors having an important ecological footprint, i.e. production of electricity and transportation, is targeted.In the firstly mentioned sector, the progression of wind energy is at present the most rapid among all renewable energies. But wind turbines still suffer from a global lack of reliability and accessibility compared to classical power plants,

APA, Harvard, Vancouver, ISO, and other styles

42

Biancalani, Enrico. "Towards a novel concept of imaging spectrograph." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14056/.

Full text

Abstract:

L'obiettivo della presente tesi è di introdurre una nuova concezione di fotorivelatore astrofisico, in grado di analizzare immediatamente la composizione spettrale di immagini bidimensionali. Prima di tutto, la sua innovativa tecnologia, che si basa sull'effetto superconduttivo dell'induttanza cinetica, è confrontata con lo standard dei dispositivi semiconduttivi ad accoppiamento di carica. Essi contano sull'effetto fotoelettrico e possono solo percepire l'intensità della luce su un periodo d'esposizione, di per sé, senza elementi dispersivi o filtri monocromatici dinnanzi. In questo conte

APA, Harvard, Vancouver, ISO, and other styles

43

Huber, Nicolas. "Reconfigurable Hardware for the Correlating Electron Spectrograph." Thesis, University of Sussex, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.487931.

Full text

Abstract:

This thesis describes an aspect of the operational and functional implementation of the CORES instrument, an electronion spectrograph to be flown aboard the Russian Obstanovka Experiment Complex mission to the ISS in 2008. For the phenomenon under investigation, wave-particle interactions in space plasma, CORES is ideally suited as it can accept a very wide band of energies simultaneously and at the same time have 3600 field-of-view. This instrument includes a novel delay-baSed particle readout system, . developed specifically for this application. A reconfigurable device (FPGA) lies at the he

APA, Harvard, Vancouver, ISO, and other styles

44

Dean, A. J. "CIRPASS : the Cambridge Infrared Panoramic Survey Spectrograph." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598467.

Full text

Abstract:

The Cambridge Infrared Panoramic Survey Spectrograph, CIRPASS, is an infrared spectrograph that operates in the 0.9 to 1.8 <i>m</i>m wavelength region. CIRPASS was developed entirely at the Institute of Astronomy, Cambridge, and the design, construction and performance of CIRPASS are presented in this thesis. CIRPASS provides integral field spectroscopy (IFS). Spectra are simultaneously obtained from 499 contiguous spatial elements in a two-dimensional area of sky using an integral field unit (IFU). The construction of the IFU, which used a lenslet array and fibre optic bundle, is presented, a

APA, Harvard, Vancouver, ISO, and other styles

45

Ford, George Harold. "Spoken Language Identification from Processing and Pattern Analysis of Spectrograms." NSUWorks, 2014. http://nsuworks.nova.edu/gscis_etd/152.

Full text

Abstract:

Prior speech and linguistics research has focused on the use of phonemes recognition in speech, and their use in formulation of recognizable words, to determine language identification. Some languages have additional phoneme sounds, which can help identify a language; however, most of the phonemes are common to a wide variety of languages. Legacy approaches recognize strings of phonemes as syllables, used by dictionary queries to see if a word can be found to uniquely identify a language. This dissertation research considers an alternative means of determining language identification of speech

APA, Harvard, Vancouver, ISO, and other styles

46

McMullen, Cheyenne. "ASMR, Spectrograms, and Adam Young: Shaping a Genre Through Frequencies." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/theses/2839.

Full text

Abstract:

Spectrogram analysis of the most popular works of Adam Young’s four major projects; Owl City, Sky Sailing, Port Blue, and The Score Project. Spectrograms reveal several elements separate to what waveforms can show, and better show elements like frequency saturation, frequency ranges, overtones, and timbral sections. All these elements also can be used to better describe the phenomenon of the Autonomous Sensory Meridian Response (ASMR) and can also be seen on a spectrogram. Because of the ability to see these different elements, a spectrogram provides a good vehicle to analyze and compare eleme

APA, Harvard, Vancouver, ISO, and other styles

47

Al-Darkazali, Mohammed. "Image processing methods to segment speech spectrograms for word level recognition." Thesis, University of Sussex, 2017. http://sro.sussex.ac.uk/id/eprint/71675/.

Full text

Abstract:

The ultimate goal of automatic speech recognition (ASR) research is to allow a computer to recognize speech in real-time, with full accuracy, independent of vocabulary size, noise, speaker characteristics or accent. Today, systems are trained to learn an individual speaker's voice and larger vocabularies statistically, but accuracy is not ideal. A small gap between actual speech and acoustic speech representation in the statistical mapping causes a failure to produce a match of the acoustic speech signals by Hidden Markov Model (HMM) methods and consequently leads to classification errors. Cer

APA, Harvard, Vancouver, ISO, and other styles

48

Welsh, Frederick V. "Scientific application of the Santa Barbara instrument group self-guided spectrograph." Virtual Press, 2004. http://liblink.bsu.edu/uhtbin/catkey/1295146.

Full text

Abstract:

The Santa Barbara Instrument Group self-guided spectrograph is aimed primarily at the advanced amateur astronomer. This study has determined that this instrument is capable of being used for scientific research. A comparison lamp box was built to be used in conjunction with the spectrograph. A test was conducted to determine the accuracy of the grating positioning micrometer. A chart was created to allow the conversion of the micrometer readings to correlate with the position of the low-dispersion grating. To determine the scientific applicability of the spectrograph, it was used to: (1) measu

APA, Harvard, Vancouver, ISO, and other styles

49

Jemâa, Imen. "Suivi de formants par analyse en multirésolution." Electronic Thesis or Diss., Université de Lorraine, 2013. http://www.theses.fr/2013LORR0026.

Full text

Abstract:

Nos travaux de recherches présentés dans ce manuscrit ont pour objectif, l'optimisation des performances des algorithmes de suivi des formants. Pour ce faire, nous avons commencé par l'analyse des différentes techniques existantes utilisées dans le suivi automatique des formants. Cette analyse nous a permis de constater que l'estimation automatique des formants reste délicate malgré l'emploi de diverses techniques complexes. Vue la non disponibilité des bases de données de référence en langue arabe, nous avons élaboré un corpus phonétiquement équilibré en langue arabe tout en élaborant un étiq

APA, Harvard, Vancouver, ISO, and other styles

50

Doerr, Hans-Peter [Verfasser], and Wolfgang [Akademischer Betreuer] Schmidt. "Precision spectroscopy with a frequency-comb-calibrated solar spectrograph." Freiburg : Universität, 2016. http://d-nb.info/1120020719/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!