Дисертації з теми "Enhancement techniques"
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Krishnan, Gayathri. "Skin penetration enhancement techniques." Thesis, Curtin University, 2011. http://hdl.handle.net/20.500.11937/1471.
Повний текст джерелаKhakifirooz, Ali. "Transport enhancement techniques for nanoscale MOSFETs." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/42907.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (p. 155-183).
Over the past two decades, intrinsic MOSFET delay has been scaled commensurate with the scaling of the dimensions. To extend this historical trend in the future, careful analysis of what determines the transistor performance is required. In this work, a new delay metric is first introduced that better captures the interplay of the main technology parameters, and employed to study the historical trends of the performance scaling and to quantify the requirements for the continuous increase of the performance in the future. It is shown that the carrier velocity in the channel has been the main driver for the improved transistor performance with scaling. A roadmapping exercise is presented and it is shown that new channel materials are needed to lever carrier velocity beyond what is achieved with uniaxially strained silicon, along with dramatic reduction in the device parasitics. Such innovations are needed as early as the 32-nm node to avoid the otherwise counter-scaling of the performance. The prospects and limitations of various approaches that are being pursued to increase the carrier velocity and thereby the transistor performance are then explored. After introducing the basics of the transport in nanoscale MOSFETs, the impact of channel material and strain configuration on electron and hole transport are examined. Uniaixal tensile strain in silicon is shown to be very promising to enhance electron transport as long as higher strain levels can be exerted on the device. Calculations and analysis in this work demonstrate that in uniaxially strained silicon, virtual source velocity depends more strongly on the mobility than previously believed and the modulation of the effective mass under uniaxial strain is responsible for this string dependence.
(cont) While III-V semiconductors are seriously limited by their small quantization effective mass, which limits the available inversion charge at a given voltage overdrive, germanium is attractive as it has enhanced transport properties for both electrons and holes. However, to avoid mobility degradation due to carrier confinement as well as L - interband scattering, and to achieve higher ballistic velocity, (111) wafer orientation should be used for Ge NFETs. Further analysis in this work demonstrate that with uniaixally strained Si, hole 3 ballistic velocity enhancement is limited to about 2x, despite the fact that mobility enhancement of about 4x has been demonstrated. Hence, further increase of the strain level does not seem to provide major increase in the device performance. It is also shown that relaxed germanium only marginally improves hole velocity despite the fact that mobility is significantly higher than silicon. Biaxial compressive strain in Ge, although relatively simple to apply, offers only 2x velocity enhancement over relaxed silicon. Only with uniaxial compressive strain, is germanium able to provide significantly higher velocities compared to state-of-the-art silicon MOSFETs. Most recently, germanium has manifested itself as an alternative channel material because of its superior electron and hole mobility compared to silicon. Functional MOS transistors with relatively good electrical characteristics have been demonstrated by several groups on bulk and strained Ge. However, carrier mobility in these devices is still far behind what is theoretically expected from germanium. Very high density of the interface states, especially close to the conduction band is believed to be responsible for poor electrical characteristics of Ge MOSFETs. Nevertheless, a through investigation of the transport in Ge-channel MOSFETs and the correlation between the mobility and trap density has not been undertaken in the past.
(cont) Pulsed I -V and Q-V measurement are performed to characterize near intrinsic transport properties in Ge-channel MOSFETs. Pulsed measurements show that the actual carrier mobility is at least twice what is inferred from DC measurements for Ge NFETs. With phosphorus implantation at the Ge-dielectric interface the difference between DC and pulsed measurements is reduced to about 20%, despite the fact that effects of charge trapping are still visible in these devices. To better understand the dependence of carrier transport on charge trapping, a method to directly measure the inversion charge density by integrating the S/D current is proposed. The density of trapped charges is measured as the difference between the inversion charge density at the beginning and end of pulses applied to the gate. Analysis of temporal variation of trapped charge density reveals that two regimes of fast and slow charge trapping are present. Both mechanisms show a logarithmic dependence on the pulse width, as observed in earlier literature charge-pumping studies of Si MOSFETs with high- dielectrics. The correlation between mobility and density of trapped charges is studied and it is shown that the mobility depends only on the density of fast traps. To our knowledge, this is the first investigation in which the impact of the fast and slow traps on the mobility has been separated. Extrapolation of the mobility-trap relationship to lower densities of trapped charges gives an upper limit on the available mobility with the present gate stack if the density of the fast traps is reduced further. However, this analysis demonstrates that the expected mobility is still far below what is obtained in Si MOSFETs. Further investigations are needed to analyze other mechanisms that might be responsible for poor electron mobility in Ge MOSFETs and thereby optimize the gate stack by suppressing these mechanisms.
by Ali Khakifirooz.
Ph.D.
Williams, Daniel Dee. "Design analysis techniques for software quality enhancement." Online access for everyone, 2007. http://www.dissertations.wsu.edu/Thesis/Summer2007/d_williams_072407.pdf.
Повний текст джерелаAl-Atabany, Walid Ibrahim. "Image enhancement techniques for bioelectronic visual aids." Thesis, Imperial College London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.528303.
Повний текст джерелаDale-Jones, Ralph. "Contrast enhancement using grey scale transformation techniques." Thesis, University of Warwick, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387342.
Повний текст джерелаThái, Minh Thanh 1976. "Resolution enhancement techniques for antenna pattern measurements." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/86572.
Повний текст джерелаMacCormack, Stuart. "Photorefractive techniques for diode laser brightness enhancement." Thesis, University of Southampton, 1991. https://eprints.soton.ac.uk/403318/.
Повний текст джерелаUllah, Muhammad Obaid Obaid Ullah. "Link enhancement techniques for future multicarrier systems." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/link-enhancement-techniques-for-future-multicarrier-systems(255d3239-2ec7-45d5-b3e6-9bd73caa8377).html.
Повний текст джерелаCastillo, Solis Maria De los angeles. "Dielectric resonator antennas and bandwidth enhancement techniques." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/dielectric-resonator-antennas-and-bandwidth-enhancement-techniques(44b64ce4-dc73-496a-b656-dc4b9c910291).html.
Повний текст джерелаMessina, Giuseppe. "Advanced Techniques for Image Analysis and Enhancement." Thesis, Università degli Studi di Catania, 2011. http://hdl.handle.net/10761/190.
Повний текст джерелаLe attivita' di ricerca, descritte in questa tesi, sono state principalmente focalizzate sull'analisi delle immagini ed il miglioramento della qualita'. In particolare la ricerca riguarda lo studio e lo sviluppo di algoritmi di interpolazione del colore, miglioramento del contrasto e rimozione degli occhi rossi, che sono stati esclusivamente sviluppati per l'utilizzo su dispositivi "mobile". Inoltre e' stata documentata un analisi delle immagini per l'identificazione dei falsi e per il miglioramento della qualita' immagini, a fini investigativi (Forensics Image Processing). La tesi e' organizzata in tre parti: Image Processing for Embedded Devices; Image Analysis and Enhancement; Forensics Image Processing.
Parsa, Vijay. "Interference reduction techniques for somatosensory evoked potential enhancement." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23871.pdf.
Повний текст джерелаCrozier, Philip Mark. "Enhancement techniques for noise affected telephone quality speech." Thesis, University of Liverpool, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321115.
Повний текст джерелаMa, Xu. "Optimization of resolution enhancement techniques in optical lithography." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 252 p, 2009. http://proquest.umi.com/pqdweb?did=1885756601&sid=2&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Повний текст джерелаLambert, T. "Digital Enhancement Techniques for Underwater Video Image Sequences." Thesis, Honours thesis, University of Tasmania, 2005. https://eprints.utas.edu.au/253/1/tristanlthesis.pdf.
Повний текст джерелаZINI, SIMONE. "Image Enhancement and Restoration using Machine Learning Techniques." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2022. http://hdl.handle.net/10281/378899.
Повний текст джерелаDigital cameras record, manipulate, and store information electronically through sensors and built-in computers, which makes photography more available to final users which do not anymore need to rely on the use of chemicals and knowledge of mechanical procedures to develop their pictures. Different types of degradation and artifacts can affect images acquired using digital cameras, decreasing the perceptual fidelity of images and making harder many image processing and analysis tasks that can be performed on the collected images. Three elements can be identified as possible sources of artifacts in an image: the scene content, the hardware limitations and flaws, and finally the operations performed by the digital camera processing pipeline itself, from acquisition to compression and storing. Some artifacts are not directly treated in the typical camera processing pipeline, such as the presence of haze or rain that can reduce visibility of the scene in the depicted images. These artifacts require the design of ad hoc methods that are usually applied as post-processing on the acquired images. Other types of artifacts are related to the imaging process and to the image processing pipeline implemented on board of digital cameras. These include sensor noise, undesirable color cast, poor contrast and compression artifacts. The objective of this thesis is the identification and design of new and more robust modules for image processing and restoration that can improve the quality of the acquired images, in particular in critical scenarios such as adverse weather conditions, poor light in the scene etc… . The artifacts identified are divided into two main groups: “in camera-generated artifacts" and “external artifacts and problems". In the first group it has been identified and addressed four main issues: sensor camera noise removal, automatic white balancing, automatic contrast enhancement and compression artifacts removal. The design process of the proposed solutions has considered efficiency aspects, due to the possibility of directly integrating them in future camera pipelines. The second group of artifacts are related to the presence of elements in the scene which may cause a degradation in terms of visual fidelity and/or usability of the images. In particular the focus is on artifacts induced by the presence of rain in the scene. The thesis, after a brief review of the digital camera processing pipeline, analyzes the different types of artifacts that can affect image quality, and describes the design of the proposed solutions. All the proposed approaches are based on machine learning techniques, such as Convolutional Neural Networks and Bayesian optimization procedure, and are experimentally validated on standard images datasets. The overall contributions of this thesis can be summarized in three points: integration of classical imaging approaches with machine learning optimization techniques, design of novel deep learning architectures and approaches and analysis and application of deep learning image processing algorithms in other computer vision tasks.
Morris, Robert W. "Enhancement and recognition of whispered speech." Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180338/unrestricted/morris%5frobert%5fw%5f200312%5fphd.pdf.
Повний текст джерелаUdayashankara, V. "DSP Techniques for Performance Enhancement of Digital Hearing Aid." Thesis, Indian Institute of Science, 1995. http://hdl.handle.net/2005/156.
Повний текст джерелаWong, Kim Fai. "Speed enhancement techniques for comparator-based switched-capacitor circuits." Thesis, University of Macau, 2010. http://umaclib3.umac.mo/record=b2493500.
Повний текст джерелаYuksel, Basak. "Towards The Enhancement Of Biped Locomotion And Control Techniques." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609899/index.pdf.
Повний текст джерелаlive easy&rdquo
is a sign of our need for automatization. To enable for such a &ldquo
comfortable and safe&rdquo
world, the automatic systems have to be developed that satisfies the necessities of life. Biologically inspired robots, especially the humanoids, are thus the key, and research in this area focuses on the improvement of such systems. Lately, it has been shown by high dexterity examples that the humanoid robots achieved to a mature level even if there are still open issues to be improved, especially in the control and stability of the bipeds. The purpose of this thesis is to study biped locomotion in different floor conditions, such as stairs and obstacles
to improve the research done in this area
to contribute to the development of autonomous biped robots, dynamic modeling, gait planning, supervisory and guidence control, stability analysis of biped robots
and to implement new control algorithms for biped locomotion, especially by using optimization and high level intelligent control techniques. The locomotion aimed to be realized results from complex, high-dimensional, nonlinear and dynamically related interactions between the robot and its environment. The mathematical modeling of the physical system is realized based on a 5-link 7 DOF biped robot model walking on a 3D planar surface and the dynamic simulation is performed using MATLAB. In terms of control, several different methods applied, comparison and the performance of each method are given. The 3D dynamic simulation software is developed, which allows the user to operate the biped systems within a 3D virtual environment.
Zou, Xinlei. "Bandwidth enhancement techniques for probe-fed microstrip patch antennas." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/27106.
Повний текст джерелаCurnow, Alison. "Photodynamic therapy with 5-aminolaevulinic acid-techniques for enhancement." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312641.
Повний текст джерелаWinski, R. "Adaptive techniques for signal enhancement in the human electroencephalogram." Thesis, Keele University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372829.
Повний текст джерелаNahma, Lara. "A Study into Speech Enhancement Techniques in Adverse Environment." Thesis, Curtin University, 2018. http://hdl.handle.net/20.500.11937/76002.
Повний текст джерелаKamkar-Rouhani, Abolghasem. "Development and application of processing techniques for signal enhancement using multisystem resistivity measurements." Thesis, Curtin University, 1998. http://hdl.handle.net/20.500.11937/1314.
Повний текст джерелаPritchard, Thomas Anthony John. "3G Wideband-CDMA : subspace splitting techniques for downlink performance enhancement." Thesis, Imperial College London, 2005. http://hdl.handle.net/10044/1/11211.
Повний текст джерелаYin, Zhanping. "Protocol enhancement and network formation techniques in IEEE 802.15.3 WPANs." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/31760.
Повний текст джерелаApplied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate
Lundell, Johan. "Efficiency Enhancement Techniques for a 0.13 µm CMOS DECT PA." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-96235.
Повний текст джерелаJabloun, Firas. "Perceptual and Multi-Microphone Signal Subspace Techniques for Speech Enhancement." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=95577.
Повний текст джерелаIl est connu que la performance des systèmes de communication par la voix se détériore lorsqu'ils sont utilisés dans des environnements acoustiques peu favorables. En effet, la présence du bruit cause la perte de l'intelligibilité et engendre la fatigue chez les auditeurs. Ces problèmes peuvent rendre les systèmes existant sur le marché inintressants pour les clients surtout que les services offerts par les compagnies de télécommunication ne comportent aucune restriction sur les endroits où ils seront utilisés. Dans ce contexte, les algorithmes qui visent à améliorer la qualité du signal parole sont très importants du fait qu'ils permettent à ces systèmes de satisfaire les attentes du marché. Dans cette thèse, nous présentons des nouvelles techniques, visant à rehausser la qualité de la voix, qui sont basées sur l'approche de sous-espace du signal (SES). Selon cette approche, les vecteurs du signal sont projetés sur le sous-espace du signal où ils sont traités afin d'éliminer le bruit restant. Après ce traitement, les vecteurs seront reconstruits dans le domaine du temps. La projection est obtenue grâce à la décomposition en valeurs propres de la matrice de covariance du signal parole. Le problème avec l'approche SES est que le coût, en terme de temps de calcul, relié à la décomposition en valeurs propres est élevé. Dans cette thèse, nous proposons une technique simple pour résoudre ce problème. Cette technique réduit considérablement le temps de calcul car le filtre en sous-espace est mis à jour moins fréquemment. Initialement, l'implémentation de l'approche SES consistait à recalculer un nouveau filtre pour chaque vecteur. L'originalité de notre technique réside dans l'exploitation de la stationnarité du signal parole dans un intervalle de 20-30 msec afin d'utiliser la même décomposition en valeurs propres pour plusieurs vecteurs. Les expériences menées montrent que notre nouvelle technique réduit consid
Canagarajah, Cedric Nishanthan. "Digital signal processing techniques for speech enhancement in hearing aids." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260433.
Повний текст джерелаAchi, Peter Y. "Speech Enhancement Techniques for Large Space Habitats Using Microphone Arrays." Thesis, University of Louisiana at Lafayette, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10813016.
Повний текст джерелаThe astronauts? ability to communicate easily among themselves or with the ship?s computer should be a high priority for the success of missions. Long-duration space habitats--whether spaceships or surface bases--will likely be larger than present-day Earth-to-orbit/Moon transfer ships. Hence an efficient approach would be to free the crew members from the relative burden of having to wear headsets throughout the spacecraft. This can be achieved by placing microphone arrays in all crew-accessible parts of the habitat. Processing algorithms would first localize the speaker and then perform speech enhancement. The background "noise" in a spacecraft is typically fan and duct noise (hum, drone), valve opening/closing (click, hiss), pumps, etc. We simulate such interfering sources by a number of loudspeakers broadcasting various sounds: real ISS sounds, a continuous radio stream, and a poem read by one author. To test the concept, we use a linear 30-microphone array driven by a zero-latency professional audio interface. Speaker localization is obtained by time-domain processing. To enhance the speech-to-noise ratio, a frequency-domain minimum-variance approach is used.
Ogunnika, Olumuyiwa Temitope 1978. "Efficiency enhancement techniques for RF and millimeter wave power amplifiers." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78455.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 123-126).
Power amplifiers are the circuit blocks in wireless transceivers that require the largest power budget because of their relatively low efficiencies. RF designers cannot depend solely on the development better semiconductor devices in advanced deeply scaled process technologies to obtain improved power amplifier performance. The development of new and better circuits, architectures and design methodologies to maximally exploit the available semiconductor devices is very important as well. This thesis investigates a number of techniques that can be used to improve the efficiency of power amplifiers and break the power-frequency tradeoff in power amplifier design. The first technique emphasizes the use of a class E tuned output network as an efficiency enhancement tool for power amplifiers regardless of their bias conditions. A Class E tuned CMOS power amplifier (PA) operating in the 60 GHz band was designed. Design, layout, and parasitic modeling considerations to attain high-efficiency millimeter-wave PA operation are discussed. Both single-ended and differential versions of the single-stage PA were implemented in a 32 nm SOI CMOS process. Peak power added efficiency of 27% (30%), power gain of 8.8 dB (10 dB), and saturated output power > 9 dBm (12.5 dBm) were measured at 60 GHz from the single-ended (differential) PA with 0.9 V supply. The second technique investigated the efficacy of resistance compression networks in an energy recycling network operating at multi-gigahertz frequencies. The resistance compression network reduces the variation in resonant rectifier input impedance seen at the isolation port of an isolating power combiner. The system was operated at 2.14 GHz and was built around Schottky barrier diodes custom fabricated in a 0.13 [mu]m CMOS process. It is the first experimental demonstration that resistance compression networks can be used for energy recycling in multi-gigahertz applications.
by Olumuyiwa Temitope Ogunnika.
Ph.D.
Chatlani, Navin. "Advanced signal enhancement techniques with application to speech and hearing." Thesis, University of Strathclyde, 2011. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=23117.
Повний текст джерелаGoodman, Allan Paul. "Creativity-enhancement techniques for professional design students : an integrated approach." Thesis, Kansas State University, 1988. http://hdl.handle.net/2097/16724.
Повний текст джерелаBachtobji, Soumaya. "Performance Analysis of Enhancement Techniques for 3-D Cellular Networks." Thesis, Le Mans, 2019. http://www.theses.fr/2019LEMA1028.
Повний текст джерелаWith the explosive growth of mobile data demand, cellular networks have experienced several major evolutions, from the first generation to the present the fifth generation new radio cellular networks. These networks can cover a larger geographical area, with high network capacity, and low power consumption. For the next generation, the cellular networks consist in deploying a big number of small cells, such as femto-cells and picocells, which offers a lager zone of radio coverage. In fact, cell densification presents a simple and efficient solution to increase the network capacity, which relies on densely reusing the spectrum across a geographical area and hence brings base stations closer to users. Thus, the 3-D modeling and the performance enhancement of the increasingly heterogeneous cellular networks become important issues. The current thesis focuses on the study and the enhancement of 3-D cellular networks. The research work introduced in this thesis has two main axes. First, we focus on three-dimensional modeling of wireless communication networks. These models, not only describe the system when the blockages effect are neglected, but also capable of modeling the obstacles (such as buildings) in order to study their effect and propose solution to overcome. Second, new transmission schemes are proposed to enhance the performances of the urban wireless communication systems
Cluff, Stephen T. "A unified approach to GPU-accelerated aerial video enhancement techniques /." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd2780.pdf.
Повний текст джерелаHuang, Danian. "Enhancement of automatic interpretation techniques for recognising potential field sources." Thesis, University of Leeds, 1996. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719809.
Повний текст джерелаCluff, Stephen Thayn. "A Unified Approach to GPU-Accelerated Aerial Video Enhancement Techniques." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1680.
Повний текст джерелаWalker, Jacqueline. "Frame synchronization techniques and jitter generation : analysis, modelling and enhancement." Thesis, Curtin University, 1997. http://hdl.handle.net/20.500.11937/1715.
Повний текст джерелаWalker, Jacqueline. "Frame synchronization techniques and jitter generation : analysis, modelling and enhancement." Curtin University of Technology, Co-operative Research Centre for Broadband Telecommunications and Networking Telecommunications, 1997. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=10841.
Повний текст джерелаSaleem, Amina. "Image enhancement using a perceptual fusion approach." Paris 13, 2012. http://scbd-sto.univ-paris13.fr/intranet/edgalilee_th_2012_saleem.pdf.
Повний текст джерелаLa qualité de l’image perceptuelle depend essentiellement des conditions d’observation et d’acquisition, et les limitations des systems de numérisation et de transmission. On a souvent recours aux méthodes de restauration d’image et de réduction des artéfacts générés durant l’acquisition, le codage ou la transmission. Cependant, l’amélioration de la qualité d’image est un problème difficile en soi en raison de l’absence de critères objectifs bien établis pour juger des résultats. En effet, la qualité d’image est avant tout une notion subjective qui dépend de plusieurs paramètres psycho-visuels incontrôlables. De plus, chaque image a ses propres charactéristiques, et les solutions proposées dépendent aussi des applications visées. Par exemple, le réhaussement de contraste peut s’avérer efficace dans certaines zones de l’image, mais néfaste dans d’autres. Il est donc difficile de trouver une technique d’amélioration universelle qui puisse satisfaire les diverses exigences inhérentes au signal d’image. L’objectif de ce travail est de développer des méthodes basées sur une nouvelle approche où l’on fait appel à la fusion d’information et la modélisation des mécanismes de la perception visuelle. Dans ce cadre, nous proposons des méthodes de réhaussement de contraste, de filtrage et de bruit, de réductions des artefacts de codage et d’ajustement et d’équilibrage de tonalité chromatique dans le cas d’images, « HDRI ». Les performances des méthodes développées peuvent pallier les limitations des solutions de l’état de l’art et ouvrent ainsi de grandes perspectives
Hayworth, Mark Steven. "Enhancement, tracking, and analysis of digital angiograms." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184371.
Повний текст джерелаKamkar-Rouhani, Abolghasem. "Development and application of processing techniques for signal enhancement using multisystem resistivity measurements." Curtin University of Technology, Department of Exploration Geophysics, 1998. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=10895.
Повний текст джерелаresistivity residual was found to depend on the array type and dimensions, the nature of the anomalous zone, geological layer geometries, and resistivity contrasts of the layers involved. While the apparent resistivity residual signature requires some measure of interpretation, it is shown to enhance the resolution and detectability of 3-D targets in a layered environment.The presence of random noise produces some degradation in the performance of the residual technique, but a normalisation procedure has been developed to alleviate the problem. A preliminary field trial showed that survey profiles of apparent resistivity residual were able to locate a subsurface conductive anomaly in an area in Western Australia.A transitional zone is defined as a layer in the earth where resistivity varies as a continuous function of depth. A theoretical formulation for the electrical response of an earth structure composed of anomalous 3-D bodies in the presence of transitional layers is introduced. Tests on synthetic survey data showed that the apparent resistivity residual is an effective anomaly detector in transitional layer environments.A multi-system method of computing an apparent resistivity residual has been developed theoretically and tested on both synthetic and field data. This new approach when applied to resistivity profiling is more sensitive to, and gives greater resolution of, localised anomalies than is possible using conventional profiling procedures.
Akgun, Toygar. "Resolution enhancement using natural image statistics and multiple aliased observations." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/22675.
Повний текст джерелаCommittee Chair: Yucel Altunbasak; Committee Member: Ghassan Alregib; Committee Member: Marcus Spruill; Committee Member: Patricio A. Vela; Committee Member: Russell M. Mersereau.
Turan, Arif Ergun. "Analysis And Comparison Of The Contrast Enhancement Techniques For Infrared Images." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614057/index.pdf.
Повний текст джерелаSrinivas, Tara. "Evaluation and enhancement of computational techniques in indoor air quality analysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63557.pdf.
Повний текст джерелаRobinson, James W. "Application of patch-based super-resolution techniques to CCTV video enhancement." Thesis, Staffordshire University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402457.
Повний текст джерелаLandberg, Markus. "Enhancement Techniques for Lane PositionAdaptation (Estimation) using GPS- and Map Data." Thesis, Linköpings universitet, Datorseende, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-110812.
Повний текст джерелаEtt filpositioneringssystem undersöks och förbättringstekniker för ökandet av robusthetoch tillgängligheten av ett sådant system genom att använda ytterligaresensorkällor som kartdata och GPS. Detta examensarbete presenterar beskrivningenav ett system, två modeller och två implementerade filter. Examensarbetetinnehåller också slutsatser och resultat av teoretiska och experimentella testersom plottar och grafer av ökad robusthet och tillgängligheten av systemet. Dettasystem kan bli integrerat med ett framtaget system som tittar på körrelaterat beteendevid trötthet. Systemet är utvecklat i ett projekt kallat Drowsi, där blandandra Volvo Technology deltog.
Sepehr, H. "Advanced adaptive signal processing techniques for low complexity speech enhancement applications." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1306808/.
Повний текст джерелаFarrugia, Kevin Joseph. "An evaluation of enhancement techniques for footwear impressions made on fabric." Thesis, University of Strathclyde, 2011. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=16878.
Повний текст джерелаMelicher, Milos. "An Enhancement of Existing RF Data Links Using Advanced Diversity Techniques." International Foundation for Telemetering, 2010. http://hdl.handle.net/10150/605912.
Повний текст джерелаThe theoretical capacity of communication channel in the presence of additive white Gaussian noise (AWGN) as defined by Shannon's channel capacity theorem has been well understood since 1940s. This theorem bounds the bit error rate (BER) of RF data links achievable for a particular noise level. The development in digital technology over the last decade has made it possible not just to design devices that operate close to the Shannon's limit, but also to explore techniques, such as best source and best data selectors, for further improvements in performance of RF data links where frequency, spatial or polar diverse reception is possible. This paper discusses an approach to improving quality of data links using an advanced diversity technique that does not select one source at a time but aligns and combines soft values from each. It shows how the overall bit error rate of RF data link can be improved by combining signals from multiple receivers and/or transmitters. Test results showing practical performance improvements are presented and discussed.