Log in

Relevant bibliographies by topics / Spectral study / Dissertations / Theses

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

Dissertations / Theses on the topic 'Spectral study'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 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 'Spectral study.'

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

Rozario, Hoimonti Immaculata. "Spectroscopic study of acetylene and hydrogen cyanide." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Physics and Astronomy, c2012, 2012. http://hdl.handle.net/10133/3415.

Full text

Abstract:

High-resolution molecular spectroscopy has been used to study acetylene line parameters and emission spectra of hydrogen cyanide. All acetylene spectra were recorded in our laboratory at the University of Lethbridge using a 3-channel tuneable diode laser spectrometer. N2-broadened line widths and N2-pressure induced line shifts have been measured for transitions in the v1+v3 band of acetylene at seven temperatures in the range 213–333K to obtain the temperature dependences of broadening and shift coefficients. The Voigt and hard-collision line profile models were used to retrieve the line para

APA, Harvard, Vancouver, ISO, and other styles

2

Benredjem, Djamel. "Etude théorique du déplacement des raies spectrales par effet de polarisation dans les plasmas denses : cas des raies de l'hélium hydrogenoïde." Paris 6, 1986. http://www.theses.fr/1986PA066016.

Full text

Abstract:

Le déplacement des raies de l'hélium hydrogenoïde émises dans les plasmas denses a été calculé en considérant l'effet des électrons libres et celui des ions perturbateurs sur l'émetteur. Le premier, déterminé par une méthode de potentiel auto-consistant, induit un déplacement vers le rouge alors que le second, calcule par perturbation, décale les raies vers le bleu. Deux méthodes de calcul de cette grandeur ont été développées : l'une permet d'évaluer le déplacement comme moment spectral du profil complet; l'autre, plus simple, séparé les deux contributions et peut s'appliquer à des états très

APA, Harvard, Vancouver, ISO, and other styles

3

Rai, Kashma K. Fontecchio Adam. "Study of spectral sensing using electro-optic films /." Philadelphia, Pa. : Drexel University, 2010. http://hdl.handle.net/1860/3274.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Azam, Nadia Farhanaz. "Spectral clustering: An explorative study of proximity measures." Thesis, University of Ottawa (Canada), 2009. http://hdl.handle.net/10393/28238.

Full text

Abstract:

In cluster analysis, data are clustered into meaningful groups so that the objects in the same group are very similar, and the objects residing in two different groups are different from one another. One such cluster analysis algorithm is called the spectral clustering algorithm, which originated from the area of graph partitioning. The input, in this case, is a similarity matrix, constructed from the pair-wise similarity between data objects. The algorithm uses the eigenvalues and eigenvectors of a normalized similarity matrix to partition the data. The pair-wise similarity between the object

APA, Harvard, Vancouver, ISO, and other styles

5

Gamble, Robin. "A study of narrow-band spectral reflection filters." Thesis, Queen's University Belfast, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335958.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Jones, G. J. "A study of the surface finish produced by grinding." Thesis, Brunel University, 1985. http://bura.brunel.ac.uk/handle/2438/4893.

Full text

Abstract:

A survey of the literature of grinding and surface texture shows the influence of dressing and wear on surfaces involved in the process and the advantages of stylus profilometry for data collection from both grinding wheels and ground surfaces. Statistical analysis is favoured for surface profile characterization and, of the various parameters used, power spectral density alone offers some prospect of effective comparison between these surfaces. Work on grinding with single crystals of natural corundum was eventually discontinued in favour of experiments with conventional bonded grinding wheel

APA, Harvard, Vancouver, ISO, and other styles

7

Garrett, Kevin James. "Study of ice cloud properties using infrared spectral data." Thesis, [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1420.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Seo, P. J. "Spectroscopic studies on small molecules : Chlorine containing compounds in the gas phase and electrolytes in formamide." Thesis, University of Newcastle Upon Tyne, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378293.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Weishaupt, Holger. "A study of power spectral densities of real and simulated Kepler light curves." Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-45802.

Full text

Abstract:

During the last decade, the transit method has evolved to one of the most promising techniques in the search for extrasolar planets and the quest to find other earth-like worlds. In theory, the transit method is straight forward being based on the detection of an apparent dimming of the host star’s light due to an orbiting planet traversing in front of the observer. However, in practice, the detection of such light curve dips and their confident ascription to a planetary transit is heavily burdened by the presence of different sources of noise, the most prominent of which is probably the so ca

APA, Harvard, Vancouver, ISO, and other styles

10

MAGALHAES, MAYSA SACRAMENTO DE. "A SPECTRAL SEQUENTIAL APPROACH TO STUDY NON-STATIONARY TIME SERIE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1992. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8787@1.

Full text

Abstract:

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Diferentes procedimentos têm sido propostos para a modelagem e previsão de séries temporais sendo que nos anos recentes muitos dos métodos mais importantes têm sido formulados na representação espaço de estado. A principal vantagem de tal abordagem é que se pode usar o Filtro de Kalman diretamente para, seqüencialmente, atualizar o vetor de estado. Apresentamos de forma sistemática a abordagem para a previsão de Séries Temporais não- Estacionárias formulada na representação de espaço de estado desenvolvida por P.Young. A

APA, Harvard, Vancouver, ISO, and other styles

11

Kwag, Jae-Hwan. "A comparative study of LP methods in MR spectral analysis /." free to MU campus, to others for purchase, 1999. http://wwwlib.umi.com/cr/mo/fullcit?p9962536.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Chan, Chi-kwan. "Numerical Study of Magnetohydrodynamic Flows in Astrophysics with Spectral Methods." Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/195440.

Full text

Abstract:

Disk phenomena appear in many astrophysical systems and interact with almost any kind of objects in the Universe. Understanding the dynamics of disks is one of the most important areas of study in modern astrophysics. Although theoretical study of accretion disks have been carried out for half a century, we have not yet achieved a self-consistent understanding. The major difficulties of accretion theory comes from the non-linearity of magnetohydrodynamics as well as the large degree of freedom in turbulent flows, where analytical studies bring limited progress. This dissertation is about d

APA, Harvard, Vancouver, ISO, and other styles

13

Jonsson, Erik. "Numerical Range of Square Matrices : A Study in Spectral Theory." Thesis, Linköpings universitet, Matematik och tillämpad matematik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-157661.

Full text

Abstract:

In this thesis, we discuss important results for the numerical range of general square matrices. Especially, we examine analytically the numerical range of complex-valued $2 \times 2$ matrices. Also, we investigate and discuss the Gershgorin region of general square matrices. Lastly, we examine numerically the numerical range and Gershgorin regions for different types of square matrices, both contain the spectrum of the matrix, and compare these regions, using the calculation software Maple.

APA, Harvard, Vancouver, ISO, and other styles

14

Ueta, Akira. "Infrared Spectral Signatures of Fluorinated Carbon Nanostructures -A Molecular Dynamics Study." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/157794.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Zhang, Xirui. "Dual-spectral interferometric sensor for quantitative study of protein-DNA interactions." Thesis, Boston University, 2014. https://hdl.handle.net/2144/19699.

Full text

Abstract:

Thesis (Ph.D.)--Boston University<br>The maintenance and functions of the genome are facilitated by DNA-binding proteins, whose specific binding mechanisms are not yet fully understood. Recently, it was discovered that the recognition and capture ofDNA conformational flexibility and deformation by DNA-binding proteins serve as an indirect readout mechanism for specific recognition and facilitate important cellular functions. Various biophysical techniques have been employed to elucidate this conformational specificity of protein-DNA interactions. These techniques are not sufficiently high-thro

APA, Harvard, Vancouver, ISO, and other styles

16

Bell, Angela Hilary. "The study of power spectral analysis of the EEG in the newborn." Thesis, Queen's University Belfast, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336188.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Rynell, Anders. "An experimental and numerical study of an automotive cooling module." Doctoral thesis, KTH, Farkost och flyg, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-199285.

Full text

Abstract:

Heavy vehicles are major emitters of noise. Especially at idle or low vehicle speeds a large portion of the noise emanates from the fan that forces the ﬂow through the cooling module. The aim of this work is to investigate and reveal aerodynamic and acoustic installation effects linked to the cooling package. This introduces a multidisciplinary approach involving examination of the ﬂow ﬁeld, sound generation and sound propagation. The work includes two main parts: an experimental and a numerical part. The cooling module used throughout this work, named reduced cooling module, primarily include

APA, Harvard, Vancouver, ISO, and other styles

18

Alsaleh, Ajyal Zaki. "Spectral, Electrochemical, and Solar Cell Studies of Peripheral Modified Carboxy Zinc Porphyrins." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1505284/.

Full text

Abstract:

Six peripherally meso-modified Zn (II) porphyrin sensitizer dyes are designed and their J-V performance in dye sensitized solar cell (DSSC) evaluated. Electron-donating groups including phenothiazine, carbazole and pyrene are used to modify the porphyrin macrocycle at the meso-carbon position(s). To compare the effect of donor substitution on the performance of the cells in terms of short circuit current (Jsc), light harvesting efficiency (LHE) and power conversion efficiency (η), two sets of sensitizers with different degrees of substitution are synthesized. One set of dyes (mono-substituted)

APA, Harvard, Vancouver, ISO, and other styles

19

Portwood, Lynn. "Spectroscopic studies of coal and an ESR study of mono and dicarbonyl radical cations." Thesis, University of Leicester, 1987. http://hdl.handle.net/2381/27840.

Full text

Abstract:

Part I - ESR spectra of pure coals, oils and tars are presented; their g values and linewidths are calculated. Almost all the spectra are single, broad resonances; but one coal, Hucknall Coal, exhibits a two line spectrum, a narrow line superimposed on a broad line. On admission of oxygen the narrow line is reversibly lost. On the addition of various solvents to the samples, in most cases, an irreversible loss in ESR signal intensity was observed. There seems to be no direct correlation between which solvent is added to which coal and the effect on the ESR signal intensity. Infra-red spectra o

APA, Harvard, Vancouver, ISO, and other styles

20

Naugler, David George. "Spectral estimation of NMR relaxation, a consequence of a study on ethanol neurotoxicity." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ61667.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Said, Mazlina Mohd. "Chemometrics study and spectral database development of pharmaceuticals and herbal products : Malaysian perspective." Thesis, University College London (University of London), 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.550960.

Full text

Abstract:

The issues for drug qualities, distribution of counterfeit and adulterated medicines in the market are not rare globally and rather common in a developing country like Malaysia. Despite stringent legislation and monitoring by the government, the problems still exist and the number of cases kept on increasing each year. This research aimed to design and proposed a strategy that can be used to overcome these problems. A combination of near infrared (NIR), mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectral databases and chemometrics analyses of their spectroscopic fingerprints f

APA, Harvard, Vancouver, ISO, and other styles

22

Nelson, Michaela Jane. "The study of magnetically-confined tokamak plasmas in the x-ray spectral region." Thesis, Queen's University Belfast, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.479416.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Bedikoglou, Isidore. "A study of spectral line surveys for four regions related to star formation." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.514420.

Full text

Abstract:

Star formation is a process that has been studied extensively during the last decades. With the advent of advanced instruments our knowledge has expanded beyond the point of general descriptions. From simple models of gravitational contraction of spherical clouds we have managed to give more detailed descriptions about the inner processes and the chemistry within the environment of proto stars and young stellar objects. Still there are several issues that have not been fully understood, such as the formation of stars with very large masses, the exact mechanism that generates strong bipolar out

APA, Harvard, Vancouver, ISO, and other styles

24

Robertshaw, Oliver. "A spectral MHD code for the non-linear study of magnetic neutron stars." Thesis, University of Southampton, 2010. https://eprints.soton.ac.uk/197311/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Mandrekar, Sumithra J. "Modeling of Heart Period Data And A Study of the Associated Spectral Measures." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1037969947.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Risal, Laxmi. "STUDY OF PRESSURE DEPENDENCE OF MOLECULAR CONFORMATION OF NADH USING SPECTRAL PHASOR ANALYSIS." Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1469015215.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Földes, Timothy. "Chromatin Structure and Dynamics : Insights from a Spectral Study of Critical Interacting Polymers." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS582.

Full text

Abstract:

L'objectif principal de cette thèse est de réaliser une étude complète de modèles de polymères afin d'établir des résultats de référence qui puissent améliorer l'analyse des données expérimentales sur la chromatine. Cette recherche porte à la fois sur les aspects d'équilibre et de dynamique, abordant des questions fondamentales sur le comportement des polymères dans les systèmes biologiques. Dans la première partie de la thèse, l'accent est mis sur les propriétés d'équilibre, fournissant un cadre théorique pour l'étude des données FISH séquentielles. Ceci inclut l'introduction de concepts esse

APA, Harvard, Vancouver, ISO, and other styles

28

Ferreira, Heliene. "The correlation of sedimentation processes and land-use through remote sensing : the case study of the Jequia Lagoon, Alagoas, Brazil." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2002. http://theses.uqac.ca.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

DeStefano, Dominic. "A Guide to the Pedagogy of Microtonal Intonation in Recent Viola Repertoire: Prologue by Gérard Grisey as Case Study." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1277154671.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Larson, Ana Marie. "A study of high quality, near-infrared spectra of eight spectral type of K stars: precise radial velocities, chromospheric emission, and fundamental stellar parameters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq21938.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Pérez, Carrillo Alfonso Antonio. "Enhacing spectral sintesis techniques with performance gestures using the violin as a case study." Doctoral thesis, Universitat Pompeu Fabra, 2009. http://hdl.handle.net/10803/7264.

Full text

Abstract:

In this work we investigate new sound synthesis techniques for imitating musical instruments using the violin as a case study. It is a multidisciplinary research, covering several fields such as spectral modeling, machine learning, analysis of musical gestures or musical acoustics. It addresses sound production with a very empirical approach, based on the analysis of performance gestures as well as on the measurement of acoustical properties of the violin. Based on the characteristics of the main vibrating elements of the violin, we divide the study into two parts, namely bowed string and viol

APA, Harvard, Vancouver, ISO, and other styles

32

Horrobin, Matthew. "A study of T Tauri stars with multiple spectral types and their surface temperatures." Thesis, University of Edinburgh, 2000. http://hdl.handle.net/1842/28248.

Full text

Abstract:

This thesis describes the results of two spectral studies of T Tauri stars. T Tauri stars are young, low mass, stars which have yet to evolve to the point where Hydrogen fusion occurs in their cores. They are normally found in groups associated with gas clouds in locations called star forming regions. Much work has been done to explain the bizarre spectral features of T Tauri stars, and this has led to the development of a standard model for their structures. Classical T Tauri stars are thought to be surrounded by large discs of accreting material, which slowly adds to the mass of the star. Th

APA, Harvard, Vancouver, ISO, and other styles

33

Bertel, Jeffrey D. "Analytical study of the spectral-analysis-of-surface-waves method at complex geotechnical sites." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4625.

Full text

Abstract:

Thesis (M.S.) University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 21, 2007) Includes bibliographical references.

APA, Harvard, Vancouver, ISO, and other styles

34

Long, Robert F. "Spectral and electrochemical study of the response of mechanism of ionphore-based polymeric membranes." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Summer/Dissertations/LONG_ROBERT_54.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Furuhashi, Takeshi, Tomohiro Yoshikawa, and Kazuto Inagaki. "A Study on Extraction of Minority Groups in Questionnaire Data based on Spectral Clustering." IEEE, 2014. http://hdl.handle.net/2237/20713.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Zara, Stephen John. "A high spectral resolution study of vegetation reflectance in the red and near infrared." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/38204.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Pothuraju, Maneesha. "A Study on the Electromagnetic and Mechanical Vibrations of a Dynamometer Using Spectral Analysis." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1613747909641685.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Chilakapati, Sindhura, and Sri Lakshmi Jyothirmai Mamidala. "Study of Vibration Transmissibility of Operational Industrial Machines." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13906.

Full text

Abstract:

Industrial machines during their operation generate vibration due to dynamic forces acting on the machines. This vibration may create noise, abrasion in the machine parts, mechanical fatigue, degrade performance, transfer to other machines via floor or walls and may cause complete shutdown of the machine. To limit the vibration pre-installation, vibration isolation measures are usually employed in workshops and industrial units. However, such vibration isolation may not be sufficient due to varying operating and physical conditions, such as machine ageing, structural changes and new installati

APA, Harvard, Vancouver, ISO, and other styles

39

Lo, Wing-Chi Nadia Physics Faculty of Science UNSW. "A multi-molecular line study of an entire giant molecular cloud." Awarded by:University of New South Wales. Physics, 2009. http://handle.unsw.edu.au/1959.4/44587.

Full text

Abstract:

A unified theory of star formation remains one of the major unsolved issues in astrophysics. Presented here are the results of multi-molecular lines mapping of the entire giant molecular cloud G333, comprised sites of low- and high-mass star forming regions in various evolution stages of star formation. The result shows the spatial distribution of CS, HCO+, HCN and HNC are similar on large scales, while N2H+ seems to trace preferentially the very densest regions, possibly due to the chemical difference, that N2H+ is sensitive to temperature and readily destroyed by CO. Two analysis methods wer

APA, Harvard, Vancouver, ISO, and other styles

40

Mbarek, Aiman. "Études théorème d'absorption limite pour les opérateurs de Schrödinger et Dirac avec un potentiel oscillant." Thesis, Cergy-Pontoise, 2017. http://www.theses.fr/2017CERG0839/document.

Full text

Abstract:

Dans cette thèse nous avons étudié, d'une part le théorème d'absorption limitepour des opérateurs de Schrödinger et de Dirac avec des potentiels oscillants. Lefait de considérer des potentiels oscillants est intéressant dans la mesure où ses opé-rateurs peuvent avoir des valeurs propres plongées dans le spectre continu (c'est lecas pour Schrödinger), ce qui est plutôt inhabituel et introduit de nouvelles di-cultés. L'étude du théorème d'absorption limite est très importante pour la théoriede la diffusion. Un intérêt particulier du sujet réside dans le fait que l'outil naturelpour procéder à l'

APA, Harvard, Vancouver, ISO, and other styles

41

Meng, Limin. "Experimental study and numerical simulations of the spectral properties of XUV lasers pumped by collisional excitation." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00790077.

Full text

Abstract:

Improving the knowledge of the spectral and temporal properties of plasma-based XUV lasers is an important issue for the ongoing development of these sources towards significantly higher peak power. The spectral properties of the XUV laser line actually control several physical quantities that are important for applications, such as the minimum duration that can be achieved (Fourier-transform limit). The shortest duration experimentally achieved to-date is ~1 picosecond. The demonstrated technique of seeding XUV laser plasmas with a coherent femtosecond pulse of high-order harmonic radiation o

APA, Harvard, Vancouver, ISO, and other styles

42

D'Antonio, Daniele. "A wide frequency study of the spectral properties of cores and lobes of radio galaxies." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14083/.

Full text

Abstract:

Low-frequency radio arrays are opening a new window for the study of the sky, to characterise both new phenomena and already known classes of sources. In our work, we characterise the spectral properties of the blazar population at low radio frequency, compare the radio and high energy properties of the gamma-ray blazar population, and search for radio counterparts of the unidentified gamma-ray sources. In a previous work (Giroletti et al. 2016), the 6100 square degrees Murchison Widefield Array Commissioning Survey catalogue (MWACS) was cross-correlated with the third catalogue of gamma-ray

APA, Harvard, Vancouver, ISO, and other styles

43

Jin, Chichuan. "A systematic study of the optical to X-ray spectral properties of active galactic nuclei." Thesis, Durham University, 2012. http://etheses.dur.ac.uk/3476/.

Full text

Abstract:

In this thesis I present a detailed study of the optical to X-ray spectral properties of Active Galactic Nuclei (AGN). We propose a new broadband SED model which combines the standard accretion disc emission, low and high temperature Comptonisation components by introducing a corona radius. Applying the new models to broadband spectral data, we found that RX J0136.9-3510 and RE J0134+396 have similar {\it rms} spectra and broadband SEDs, representing a distinct spectral state which can only be attained by super Eddington flows. A detailed optical and X-ray spectral analysis is then carried out

APA, Harvard, Vancouver, ISO, and other styles

44

Jin-Ren, Chern, and 陳金仁. "A Study of Spectral Rendering Algorithms." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/15202717366641891499.

Full text

Abstract:

博士<br>國立中興大學<br>資訊科學研究所<br>93<br>Images involving important optical effects, such as light dispersion, interference, diffraction, and fluorescence, must be synthesized with spectral rendering. However, the handling of data and SPDs (Spectral Power Distribution) for spectral rendering is really more difficult than the handling of RGB data, since SPDs include a vast number of wavelengths. In addition, spectral rendering has been notorious for its high-complexity computing. In this dissertation, we present two methods to solve the problems depicted above. Spectral surface reflectance curves ar

APA, Harvard, Vancouver, ISO, and other styles

45

Wu, Chung-Yi, and 吳忠郼. "A Study of the Multi-spectral Image Acquisition System for Color Spectrum Reproduction." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/70917617917926966901.

Full text

Abstract:

碩士<br>國立交通大學<br>電子工程系<br>91<br>In this thesis, we present the development of a multi-spectral image acquisition system, which is based on the scheme proposed by the Munsell Color Science Laboratory at Rochester Institute of Technology. This system can faithfully reconstruct the spectral reflectance function of the subject surface. The whole system consists of a digital monochromatic camera, a set of seven color filters, a given light source, and a personal computer. After careful system characterization, we have demonstrated that the reconstructed reflectance functions are very close to the or

APA, Harvard, Vancouver, ISO, and other styles

46

Tseng, Chung-Long, and 曾慶龍. "Spectral response and stability study of color sensor." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/79919515933658241691.

Full text

Abstract:

碩士<br>國立交通大學<br>電信研究所<br>85<br>The color correction of color gamut can be accomplished directly by matrix operations. Linear matrix transforms may be regarded as recom- binations of the spectral responses of the scanners. Common scanners usually process color signals via three filters corresponding to the three tristimulus values. Thereby, a 3 by 3 matrix representing the color correction function is needed for the scanners. If higher order polynomials are used, a 3 by P matrix is

APA, Harvard, Vancouver, ISO, and other styles

47

O, J. Y., and 歐俊堯. "Synthetic and spectral study of iminoquinolinone-type ligands." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/73566167007974385269.

Full text

Abstract:

博士<br>國立中央大學<br>化學工程學系<br>85<br>There are two topics in this study,(1)synthetic and spectral studies of iminoquinone-ligands;(2)synthetic and spectral studies of such complexes with above ligands. We synthesized indophenol-type iminoquinolinones(IQLO)by condensing 8-hydroxyquinoline with 2- or 4-hydroxy aromatic amines in the presence of atmospheric oxygen. The reaction is considered to proceed by oxidationof hydroxy aromatic amines,via a semiquinone ion,and gives IQLO in 83-98%yields. I

APA, Harvard, Vancouver, ISO, and other styles

48

Ho, Tzong-Ren, and 何宗仁. "A Study of Spectral Conversion of Mandarin Base-Syllables." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/23007311751093390160.

Full text

Abstract:

碩士<br>國立交通大學<br>電信工程系<br>90<br>The performance of voice conversion depends on the mapping function with the aim to convert the characteristic features from the source speaker to the target speaker. Previous research is based on vector cookbook mapping, but the converter’s performance is degraded due to the quantization noise. To overcome this limitation, we proposed two mapping functions based on continuous probabilistic models. One is based on a statistical model, and the other is based on a Gaussian mixture model. To save that the training data, we exploit the high correlation of speech char

APA, Harvard, Vancouver, ISO, and other styles

49

Wang, Yung Kun, and 王永琨. "The Study of Spectral Entropy in the Chaotic System." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/60789962677926635978.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Lee, Yan-Tze, and 李彥澤. "A Study on Vector Quantization for Line Spectral Frequencies." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/49092828547070180164.

Full text

Abstract:

碩士<br>大同大學<br>電機工程研究所<br>90<br>For the most part speech coding systems, they use linear prediction (LP) filter to model the vocal tract. Generally, we use the line spectral pair (LSP) or line spectral frequencies (LSF’s) to represent the coefficients of the LP filter in the frequency domain. LSF’s parameters are currently one of the best choices for the coefficients of the LP filter. This thesis will discuss LSF’s parameters at some details. For low bit rate speech coding applications, it is a very important issue to use as few bits as possible to quantize these coefficients. Throu

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!