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Dissertations / Theses on the topic 'Length spectrum'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Tamarit, Sariol Anna. "Singular phenomena in the length spectrum of analytic convex curves." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/318372.

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Consider the billiard map defined inside an analytic closed strictly convex curve Q. Given q>2 and 0<p<q relatively prime integers, there exist at least two (p,q)-periodic trajectories inside Q. The main goal of this thesis is to study the maximal difference of lengths among (p,q)-periodic trajectories on the billiard, D(p,q). The quantity D(p,q) gives some dynamical and geometrical information. First, it characterizes part of the length spectrum of Q and so it relates to Kac's question, "Can one hear the shape of a drum?''. Second, D(p,q) is an upper bound of Mather's DW(p/q) and so it quant

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2

Faulkner, Sean (Sean Anthony) Carleton University Dissertation Engineering Electrical. "Determination of maximal-length sequences by weight distribution analysis." Ottawa, 1989.

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3

Moore, Megan O. 'Neal. "One Size Does Not Fit All: Optimizing Sequence Length with Recurrent Neural Networks for Spectrum Sensing." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/104050.

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With the increase in spectrum congestion, intelligent spectrum sensing systems have become more important than ever before. In the field of Radio Frequency Machine Learning (RFML), techniques like deep neural networks and reinforcement learning have been used to develop more complex spectrum sensing systems that are not reliant on expert features. Architectures like Convolutional Neural Networks (CNN) and Recurrent Neural Networks (RNN) have shown great promise for applications like automated modulation classification, signal detection, and specific emitter ID. Research in these areas has prim

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4

Hamilton, Katie. "An exploration of the relationship between autism spectrum disorders, theory of mind and the serotonin transporter promoter length polymorphism." Master's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/24321.

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Includes bibliographical references<br>Autism Spectrum Disorder (ASD) is a highly heritable prevalent pervasive developmental disorder. All cases have deficits in social communication and interaction and in restricted and repetitive behaviours and interests. The mechanisms underlying different clinical presentations remain elusive. Deficits in Theory of Mind (ToM), the ability to understand that others have mental states independent of one's own, have been suggested as a possibly underlying the socia l deficits in ASD. The serotonin transporter promoter length polymorphism (5 - HTTLPR) has b

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5

Abuzaid, Dina Asaad. "A classification of the point spectrum of constant length substitution tiling spaces and general fixed point theorems for tilings." Thesis, University of Leicester, 2016. http://hdl.handle.net/2381/37027.

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We examine the point spectrum of the various tiling spaces that result from different choices of tile lengths for substitution of constant length on a two or a three letter alphabet. In some cases we establish insensitivity to changes in length. In a wide range of cases, we establish that the typical choice of length leads to trivial point spectrum. We also consider a problem related to tilings of the integers and their connection to fixed point theorems. Using this connection, we prove a generalization of the Banach Contraction Principle.

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Hor, Yuenkeung. "The Daya Bay Reactor Neutrino Experiment." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/50523.

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The Daya Bay experiment has determined the last unknown mixing angle $theta_{13}$. This thesis describes the layout of the experiment and the detector design. The analysis presented in the thesis covered the water attenuation, spent fuel neutrino and electron anti-neutrino spectrum. Other physics analysis and impact to future experiments are also discussed.<br>Ph. D.

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Efstration, Katherine M. Keiley Margaret K. Smith Thomas A. (Thomas Alton) Mize Jacquelyn. "The effect of depressotypic attributions on marital satisfaction as mediated by spousal support and moderated by length of marriage in mothers of children with autism spectrum disorders." Auburn, Ala, 2009. http://hdl.handle.net/10415/1903.

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8

Zare, Aurea Tucay. "Length dependence of the Raman spectra of carbon nanotubes." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/47749.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2009.<br>Includes bibliographical references.<br>DNA-wrapping technology, combined with size-exclusion chromatography, have made possible the sorting of carbon nanotubes according to length. In particular, length sorted nanotube samples, with finite lengths approaching the exciton size, are now available. Hence, experiments that explore the finite size effects, in addition to length dependence, are now possible. Although there are many experimental and theoretical studies of the diamet

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9

Venn, Madan R. "CONVOLUTIONAL CODED GENERALIZED DIRECT SEQUENCE SPREAD SPECTRUM." Cleveland State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=csu1212066245.

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10

Schreibman, Ken L. "Spectral analysis of cardiac cycle length variations in sinus and ventricular rhythms." Case Western Reserve University School of Graduate Studies / OhioLINK, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=case1054827875.

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11

Mayer, Jan. "Spektrální vlastnosti denního světla jako časoprostorová funkce." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217893.

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Graduation thesis describes basic data about Sun, suns constant, solar radiation thoroughfare by the earth's atmosphere. Thesis describes effects of components of optical radiation and physical character of solar radiation. Thesis also describes character of day lighting in nature, spectral distribution of natural lighting, average time of sunshine. The next point of thesis is description of measuring equipment Konica Minolta. In chapter measuring procedure is described measuring process of the sky radiance. Measurement analysis is mentioned in conclusion.

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12

Yu, Bo. "Surface Mean Flow and Turbulence Structure in Tropical Cyclone Winds." FIU Digital Commons, 2007. http://digitalcommons.fiu.edu/etd/25.

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Hurricanes are one of the deadliest and costliest natural hazards affecting the Gulf coast and Atlantic coast areas of the United States. An effective way to minimize hurricane damage is to strengthen structures and buildings. The investigation of surface level hurricane wind behavior and the resultant wind loads on structures is aimed at providing structural engineers with information on hurricane wind characteristics required for the design of safe structures. Information on mean wind profiles, gust factors, turbulence intensity, integral scale, and turbulence spectra and co-spectra is essen

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13

Cerocchi, Filippo. "Dynamical and Spectral applications of Gromov-Hausdorff Theory." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENM077/document.

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Cette thèse est divisée en deux parties. La première est consacrée à la méthode du barycentre, introduite en 1995 par G. Besson, G. Courtois et S. Gallot pour résoudre la conjecture de l'Entropie Minimale. Dans le Chapitre 1 nous décrivons ses développements les plus récents, notamment l'extension de cette méthode au cadre des variétés dont la courbure sectionnelle est de signe quelconque (voir les énoncés 1.2.1 et 1.4.1). Dans le Chapitre 2 et 3 nous présentons des résultats dans lesquels la méthode du barycentre joue un rôle important. Le problème “deux variétés dont les flots géodésiques so

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14

Call, Daniel M. (Daniel Marcus) 1973. "A spectral analysis method to quantify the relative contribution of different length scales to heterogeneity in PET images of pulmonary function." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/88846.

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15

Neuhaus, TJ. "Gender Perception Dependent on Fundamental Frequency, Source Spectral Tilt, and Formant Frequencies." Bowling Green State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1586535654035042.

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16

Ulytska, Bogdana [Verfasser], Christian [Akademischer Betreuer] Fiebach, and Gerhard [Akademischer Betreuer] Büttner. "The contribution of spectral and temporal information to vowel length perception in German in children and adults / Bogdana Ulytska. Gutachter: Christian Fiebach ; Gerhard Büttner." Frankfurt am Main : Univ.-Bibliothek Frankfurt am Main, 2015. http://d-nb.info/1073226166/34.

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17

Caniparoli, Jean-Philippe. "Etude par resonance magnetique nucleaire des conformations et des interactions moleculaires dans les mesophases lyotropes : application a des problemes de solubilisation." Paris 6, 1988. http://www.theses.fr/1988PA066117.

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Etude par rmn, de l'ordre et de la dynamique moleculaire des phases lyotropes de systemes binaires agent de surface a double chaine/eau: parametres d'ordre eleves, probabilites conformationelles, temps de correlation des mouvements moleculaires tres anisotropes en fonction de la tete polaire (phosphate ou ammonium); faible influence de la longueur de la chaine. Etude de l'ordre et de la dynamique de petites molecules en solution dans le systeme dibutylphosphate de sodium/eau en phase lamellaire: influence importante du caractere hydrophile ou hydrophobe du solute. Localisation des solutes non

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18

Guillet, Stéphane. "Etude des propriétés électroniques des interfaces Ag/Si(100) et Cu/Si(100)." Grenoble 1, 1993. http://www.theses.fr/1993GRE10065.

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Les premiers stades de la formation des interfaces ag/si(100) et cu/si(100) a temperature ambiante ont ete etudies in situ par reflectivite differentielle (1. 5 ev-5. 0 ev) associee a des techniques classiques de surface: photoemission uv (ups), spectroscopie auger (aes) et diffraction d'electrons lents (del). Pour des depots plus importants (quelques dizaines a quelques centaines d'angstroms), des etudes ex situ de la reflectivite dans l'infra-rouge (0. 025 ev-1 ev) et de la conductivite electrique (entre 4k et 300k) sont egalement presentees. Un reflectometre differentiel, construit pour ces

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19

Palkki, Ryan D. "Chemical identification under a poisson model for Raman spectroscopy." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/45935.

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Raman spectroscopy provides a powerful means of chemical identification in a variety of fields, partly because of its non-contact nature and the speed at which measurements can be taken. The development of powerful, inexpensive lasers and sensitive charge-coupled device (CCD) detectors has led to widespread use of commercial and scientific Raman systems. However, relatively little work has been done developing physics-based probabilistic models for Raman measurement systems and crafting inference algorithms within the framework of statistical estimation and detection theory. The objective o

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20

Södergren, Anders. "Asymptotic Problems on Homogeneous Spaces." Doctoral thesis, Uppsala universitet, Matematiska institutionen, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-132645.

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This PhD thesis consists of a summary and five papers which all deal with asymptotic problems on certain homogeneous spaces. In Paper I we prove asymptotic equidistribution results for pieces of large closed horospheres in cofinite hyperbolic manifolds of arbitrary dimension. All our results are given with precise estimates on the rates of convergence to equidistribution. Papers II and III are concerned with statistical problems on the space of n-dimensional lattices of covolume one. In Paper II we study the distribution of lengths of non-zero lattice vectors in a random lattice of large dimen

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21

Ayet, Alex. "Flux de quantité de mouvement à l'interface air-mer : approche théorique du couplage entre turbulence et vagues de vent On the Impact of Long Wind-Waves on Near-Surface Turbulence and Momentum Fluxes, in Boundary-Layer Meteorology volume 174, March 2020 Scalewise return to isotropy in stratified boundary layer flows, in JGR Atmospheres 125 (16), August 2020 Scaling laws for the length scale of energy‐containing eddies in a sheared and thermally stratified atmospheric surface layer, in Geophysical Research Letters 47(23), December 2020." Thesis, Brest, 2020. http://www.theses.fr/2020BRES0038.

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Malgré de nombreuses études, le lien de causalité entre vent et vagues fait toujours l’objet de controverses : cela est dû entre autres au caractère multi-échelle d'une surface océanique réaliste, et à la présence de déferlements, qui modifient radicalement sa topologie. Dans cette thèse, ces deux questions sont abordées sous un angle théorique, à travers un modèle phénoménologique, qui relie les propriétés spectrales et moyennées de la turbulence proche de paroi en utilisant la géométrie de tourbillons attachés à celle-ci. La première partie de la thèse revisite ce modèle phénoménologique en

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22

Baldit, E. "Effets résonants et cohérents dans un cristal dopé aux ions erbium : oscillations cohérentes de population et transparence induite électromagnétiquement." Phd thesis, Université Paris Sud - Paris XI, 2007. http://tel.archives-ouvertes.fr/tel-00335251.

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L'excitation optique résonante de systèmes atomiques permet de bénéficier d'une réponse non linéaire exacerbée, qui ouvre la voie au traitement de la lumière par la lumière, même à faible intensité lumineuse. Certaines interactions lumière matière cohérentes permettent en outre de s'affranchir de la forte absorption associée à la résonance. Dans cette thèse deux effets cohérents et résonants ont été explorés dans un cristal d'Y2SiO5 (YSO) dopé aux ions erbium, isotope 167 : les oscillations cohérentes de populations (OCP) et la transparence induite électromagnétiquement (TIE).<br /><br /> Les

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23

Perseguini, Natália Maria. "Estudo da modulação autonômica cardíaca no processo de envelhecimento e suas relações com a terapia de reposição hormonal, proteína C-reativa e comprimento de telômeros." Universidade Federal de São Carlos, 2014. https://repositorio.ufscar.br/handle/ufscar/5177.

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Made available in DSpace on 2016-06-02T20:18:23Z (GMT). No. of bitstreams: 1 6236.pdf: 2944020 bytes, checksum: dcbf2b2eaca77c3425524a77887f4d6b (MD5) Previous issue date: 2014-06-06<br>Universidade Federal de Minas Gerais<br>The aging process affects many systems of the human body, including: autonomic nervous system, which can be assessed by heart rate variability (HRV); cellular structures, such as telomere length; and mechanisms of regulation of the inflammatory process, which can be evaluated by inflammatory markers such as high-sensitivity C-reactive protein (hsCRP). The combined analy

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24

Cerovic, Stefan. "Cooperative wireless communications in the presence of limited feedback." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLC079/document.

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Dans cette thèse, les techniques de coopération ont été étudiées pour un canal multi-accès multi-relais composé d'au moins deux sources qui communiquent avec une seule destination à l'aide d'au moins deux nœuds de relayage en mode semi-duplex. Le multiplexage par répartition dans le temps est supposé. Tout d'abord, l’algorithme d’adaptation de lien est exécuté par l'ordonnanceur centralisé. Durant la première phase de transmission, les sources transmettent chacune à leur tour leur message respectif pendant des intervalles de temps consécutifs. Dans chaque intervalle de temps dans la deuxième p

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25

Mok, Jinmyoung. "Etude ultra-sensible en phase de nano-structures par interferométrie optique à balayage en champ proche." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0086/document.

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La construction d’un NSOM, dans ce manuscrit de thèse, est décrite en détail. Lacombinaison du système NSOM construit avec un interféromètre est proposée afin d’accéderà des mesures de phase, à la fois de ultra-haute sensibilité mais également de très granderésolution spatiale. Le nom de l’instrument développé est un interferomètre optique àbalayage en champ proche (NSOI, pour l’acronyme en anglais). Le principe est basé surl’utilisation d’un diapason accordable en cristal de quartz, sur lequel se trouve une pointe,afin de sonder le matériau étudié. La mesure de la force de cisaillement de la

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26

Wang, Simy, and 王昕民. "Spectrum Sensing Based on Pilots for Short Cyclic Prefix Length in DVB-T2." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/66812845195768940582.

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碩士<br>國立中央大學<br>通訊工程學系<br>102<br>In modern wireless communications, Orthogonal Frequency-Division Multiplexing is widely used in a variety of systems such as digital video broadcasting. It turns out that the problem of how to improve the spectrum efficiency is mentioned for real applications. To solve this problem, the cognitive radio schemes are rapidly increasing in the literature. There are three main categories in cognitive radio: spectrum sensing, power control, and spectrum management. This paper studies the spectrum sensing method for DVB-T2 based on pilots to be used with a short cycl

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27

WU, WEI-LI, and 吳威俐. "Speech Enhancement Using Variable Peak-Spectrum-Holding Length Adapted by Harmonic Properties for Frame-Zero-Padding Method." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/k63t7c.

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碩士<br>亞洲大學<br>資訊傳播學系<br>104<br>Speech and noise signals are mixed in the same channel in speech communication. A speech enhancement system is employed to remove corruption noise, enabling a listener to understand the meaning of received speech. The accuracy of noise estimation significantly affects the performance of enhanced speech. This thesis proposes using a frame-zero padding and peak-spectrum-holding methods adapted by harmonic properties to improve the accuracy of noise estimation. Because speech signals are absent during the zero-padded frames, we can estimate the magnitude of noise sp

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28

i, Lee-ze, and 李姿儀. "Using multi-wave length UV/VIS absorption spectrum establishment waste water in COD and of feasibility study SS automatic monitor technology." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/74xdhs.

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碩士<br>國立中央大學<br>環境工程研究所<br>97<br>Information about the properties of influent wastewater helps a treatment plant to adjust its treatment processes or procedures to stabilize the quality of effluent wastewater. Once the properties of wastewater can be understood efficiently, the treatment plant can function effectively and its performance can be improved as well. Respecting the deficiencies of traditional measurement equipments and experiment analysis, manual test is not able to offer the required information spontaneously and cost a lot. When the situation with unusual water quality happened t

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29

Willging, Thomas A. [Verfasser]. "On length spectra of lattices / von Thomas A. Willging." 2010. http://d-nb.info/1008623067/34.

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30

Yu-PingTseng and 曾雨平. "Measuring optical gain spectra of ZnO microrod by Variable Stripe Length method." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/e9xc8x.

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31

Yedlapalli, Satya Sudhakar. "The Line Spectral Frequency Model Of A Finite Length Sequence And Its Applications." Thesis, 2010. http://etd.iisc.ernet.in/handle/2005/1262.

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32

Chou, Chih-Wei, and 鄒致瑋. "Wavelet spectral analysis and the elastic earth’s response of long-period tides in 46-years length of day." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/95399129923209695191.

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碩士<br>國立中央大學<br>地球物理研究所<br>98<br>On the basis of conservation of angular momentum, the rotational rate of the earth varies with surface and inner earth’s mass fluid and redistribution. Some geophysical phenomena which change earth’s rotational speed will be discovered by analyzing the variation in length of day (ΔLOD). In this study, nearly 50 years ΔLOD data provided from National Centers for Environmental Prediction (NCEP) are used to calculate more accurate estimates and to observe annual signals. This work has two parts. The first part is to calculate zonal response coefficient (κ) for lon

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33

辛宸瑋. "Optimized spectral distortion correction of DWDM multichannel FBG filters for a new fabrication method not limited by the phase mask length." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/68531180542757623553.

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碩士<br>國立交通大學<br>光電工程系所<br>96<br>This thesis presents work on optimized spectral distortion correction of DWDM multichannel fiber Bragg grating (FBG) filters. The developed hybrid algorithm starts from some other multichannel FBG design method which may suffer from the spectral distortion and use the Lagrange multiplier optimization (LMO) algorithm for final optimization. Due to the initially close-to-optimum index modulation profile, the calculation can be fast converged to the target reflection spectra by using the LMO algorithm and the final design still retains the merits of easy fabricatio

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34

Liu, Yan-Tong, and 劉晏彤. "Indoor Inertial Positioning Neck-Wearable Device Based on Spectral-Peak-Analysis Walk Detection and Adaptive-Harmonic-Motion Step Length for shuffling Elders." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/nag764.

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碩士<br>國立雲林科技大學<br>電機工程系<br>105<br>“Location Awareness” is Nowadays, there are 3 main categories of indoor positioning technologies complementary to outdor positioning technologies, like Global Positioning System (GPS), 1) multilateration, 2) proximity matching, and 3) dead reckoning. Against “multilateration” and “proximity matching”, “dead reckoning” featuring low cost of no infrastructure and high robustness to electromagnetic interference. Especially “inertial positioning” based on “dead reckoning” is a preferable technology in indoor positioning field and in this thesis. Most conventiona

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"The Effect of a Splitter Plate on the Flow around a Surface-Mounted Finite Circular Cylinder." Thesis, 2011. http://hdl.handle.net/10388/ETD-2011-09-171.

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Splitter plates are passive flow control devices for reducing drag and suppressing vortex shedding from bluff bodies. Most studies of splitter plates involve the flow around an “infinite” circular cylinder, however, in the present study the flow around a surface-mounted finite-height circular cylinder, with a wake-mounted splitter plate, was studied experimentally in a low-speed wind tunnel using a force balance and single-component hot-wire anemometry. Four circular cylinders of aspect ratios AR = 9, 7, 5 and 3 were tested for a Reynolds number range of Re = 1.9×10^4 to 8.2×10^4. The splitt

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