Tesis sobre el tema "Distribution of relaxation time"
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Muggli, Mark W. "Physical Aging and Characterization of Engineering Thermoplastics and Thermoplastic Modified Epoxies". Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/40509.
Texto completoPh. D.
Kwan, Kermit S. Jr. "The Role of Penetrant Structure on the Transport and Mechanical Properties of a Thermoset Adhesive". Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30666.
Texto completoPh. D.
El, Bassiri Fatima-Ezzahra. "Étude de la réaction de réduction de l'oxygène : application de la spectroscopie d'impédance à un système innovant dérivé de Ca3Co4O9+δ". Electronic Thesis or Diss., Centrale Lille Institut, 2024. http://www.theses.fr/2024CLIL0003.
Texto completoIn the context of energy transition towards carbon neutrality by 2050, Solid Oxide Fuel Cells (SOFCs) and Solid Oxide Electrolysis Cells (SOECs) offer real potential for use via hydrogen as an energy carrier. The aim of this thesis is to understand the electrochemical processes in these systems, with a view to improving their performance and durability. The technique chosen is impedance spectroscopy to study the oxygen reduction reaction. This is a complex reaction involving several stages: diffusion of molecular oxygen, dissociation of molecular oxygen at the electrode surface, diffusion of oxygen or partially ionized atoms at the solid surface or their incorporation into the solid, charge transfer, diffusion of ions into the solid, etc. Whereas gaseous diffusion is a slow process, ionic diffusion in solids is rapid. The detailed study of impedance spectra measured on symmetrical cells enables us to define the steps that limit the reaction and identify the directions to take to optimize the systems. This requires the measurement of reliable data. The Kramers-Krönig test is used to check the quality of the data. From these data, it is possible to calculate the distribution function of the relaxation times characteristic of the phenomena involved within the cell, but as the number of data is finite, solving the equation associated with this function is not straightforward. The aim of this thesis was first to define a methodology for the rigorous processing of impedance spectra measured on symmetrical cells consisting of a gadolinium-doped ceria electrolyte on which a model electrode based on Ca3Co4O9+δ, an innovative electrode material studied for several years at UCCS, has been deposited. Unlike state-of-the-art materials, calcium cobaltites have the advantage of not containing rare earths and, above all, of presenting an expansion coefficient of the same order of magnitude as that of the electrolytes used for these applications, giving rise to the hope of increased durability. Initially used as a model electrode, the substitution of strontium for calcium in this compound and its use as a composite with ceria enabled the specific features required for the application to be achieved: a specific surface resistance of less than or equal to 0.15 Ω.cm² at 700°C. The study was then extended to the characterization of complete cells. This thesis was funded by the Hauts de France Region and Centrale Lille. Part of the work was carried out as part of the MODTESTER project, a BPI-funded Eurostars Eureka project led by Fiaxell, a Swiss SME, and as part of the European NOUVEAU project, which focuses on the search for new, sustainable and reusable electrode and interconnector materials for high-temperature water electrolysis
Valivarthi, Mohan Varma y Hema Chandra Babu Muthyala. "A Finite Element Time Relaxation Method". Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-17728.
Texto completoPan, Ke. "A Systematic Methodology for Characterization and Prediction of Performance of Si-based Materials for Li-ion Batteries". The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1578038345015173.
Texto completoJouravleva, Svetlana. "Dielectric relaxation time spectroscopy for tissue characterisation". Thesis, Oxford Brookes University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364927.
Texto completoWorsley, Richard Edward. "Time-resolved relaxation processes in quantum wells". Thesis, University of Southampton, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295867.
Texto completoPersson, Erold. "Multicast Time Distribution". Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2274.
Texto completoThe Swedish National Testing and Research Institute is maintaining the Swedish realization of the world time scale UTC, called UTC(SP). One area of research and development for The Swedish National Laboratory of Time and Frequency is time synchronization and how UTC(SP) can be distributed in Sweden. Dissemination of time information by SP is in Sweden mainly performed via Internet using the Network Time Protocol (NTP) as well as via a modem dial up service and a speaking clock (Fröken Ur). In addition to these services, time information from the Global Positioning System (GPS) and from the long-wave transmitter DCF77 in Germany, is also available in Sweden.
This master’s thesis considers how different available commercial communication systems could be used for multicast time distribution. DECT, Bluetooth, Mobile Telecommunication and Radio Broadcasting are different techniques that are investigated. One application of Radio Broadcasting, DARC, was found to be interesting for a more detailed study. A theoretical description of how DARC could be used for national time distribution is accomplished and a practical implementation of a test system is developed to evaluate the possibilities to use DARC for multicast time distribution.
The tests of DARC and the radio broadcast system showed that these could be interesting techniques to distribute time with an accuracy of a couple of milliseconds. This quality level is not obtained today but would be possible with some alterations of the system.
KUMAR, VINAYAK. "ANALOG SIMULATION TIME REDUCTION BASED ON VARIABLE TOLERANCE RELAXATION". University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1163019325.
Texto completoSwaminathan, Bhargav Prasanna. "Gestion prévisionnelle des réseaux actifs de distribution - relaxation convexe sous incertitude". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAT039/document.
Texto completoPower systems are faced by the rising shares of distributed renewable energy sources (DRES) and the deregulation of the electricity system. Distribution networks and their operators (DSO) are particularly at the front-line. The passive operational practives of many DSOs today have to evolve to overcome these challenges. Active Distribution Networks (ADN), and Active Network Management (ANM) have been touted as a potential solution. In this context, DSOs will streamline investment and operational decisions, creating a cost-effective framework of operations. They will evolve and take up new roles and optimally use flexibility to perform, for example, short-term op- erational planning of their networks. However, the development of such methods poses particular challenges. They are related to the presence of discrete elements (OLTCs and reconfiguration), the use of exogenous (external) flexibilities in these networks, the non-linear nature of optimal power flow (OPF) calculations, and uncertainties present in forecasts. The work leading to this thesis deals with and overcomes these challenges. First, a short-term economic analysis is done to ascertain the utilisation costs of flexibilities. This provides a common reference for different flexibilities. Then, exact linear flexibility models are developed using mathematical reformulation techniques. The OPF equations in operational planning are then convexified using reformulation techniques as well. The mixed-integer convex optimisation model thus developed, called the novel OP formulation, is exact and can guarantee globally optimal solutions. Simulations on two test networks allow us to evaluate the performance of this formulation. The uncertainty in DRES forecasts is then handled via three different formulations developed in this thesis. The best performing formulations under uncertainty are determined via comparison framework developed to test their performance
Tsemekhman, Vadim. "Charge relaxation, current distribution, and breakdown of the quantum Hall effect /". Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/9739.
Texto completoBeyea, Steven Donald. "Magnetic resonance imaging (MRI) and relaxation time mapping of concrete". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ65451.pdf.
Texto completoYe, Yufeng 1971. "The study of long time relaxation behavior of metallocene polyethylene /". Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31081.
Texto completoNordin, Adrian y Simon Nylén. "Real-time Snow Simulator using Iterative-relaxation and Boundary Handling". Thesis, Blekinge Tekniska Högskola, Institutionen för datavetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-21788.
Texto completoBakgrund Fysikbaserad snösimulering i realtid är ett outforskat område, anledning till detta är mängden faktorer som påverkar snö, exempelvis sammanhållning, termodynamik och kompression. Simulering av snö i realtid som tar hänsyn till dessa faktorer kan bli beräkningsmässigt krävande, däremot har den växande utvecklingen av grafikprocessorer gjort utforskning av realtidsmetoder ytterligare attraktivt. Nyligen publicerad forskning inom fysikbaserade snösimuleringar i realtid visar lovande resultat i en parallell lösning och kommer att användas som motivering samt bas i detta examensarbete. Syfte Detta examensarbete syftar till att förbättra tidsstegen i en tidigare implementerad metod med hjälp av att använda ett iterativt tillvägagångssätt samt förbättra snöbeteendet med en partikelbaserad gränshanteringsimplementation. Syftet är uppdelat i följande mål. Integrera en iterativ metod, utöka snöbeteendet med ytterligare snötyper, och implementera en partikelbaserad gränshanteringsmetod med tvåvägskoppling. Den föreslagna metoden ska förhålla sig jämförbar med originalmetoden med avseende på snöbeteendet. Slutligen för att samla in resultat mäts metoderna i prestanda och dessutom används ett frågeformulär för att analysera beteendet. Metod En iterativ metod tillsammans med en partikelbaserad gränshanteringsmetod är implementerad. Båda metoderna mäts och jämförs med hjälp av kvantitativa tester. Dessutom distribueras ett kvalitativt frågeformulär för att samla resultat om snöns beteende. Resultat Den föreslagna metoden tillåter större tidsteg än originalmetoden. Den iterativa metoden är kapabel till att förstora tidsstegen tiofaldigt, samtidigt som den sänker exekveringstiden till en åttondel. Resultaten verifierar den uppfattade naturligheten av snön och jämförelsebarheten till originalmetoden. Slutsatser Den föreslagna metoden kan prestera med ett större tidssteg och en lägre exekveringstid jämfört med originalet i utbyte av högre tid spenderad per bildruta. Slutligen uppfattas snön som naturlig i sammankoppling med gränshanteringsmetoden vid en signifikansnivå på 1 %.
Shiu, Kai Pong. "Study of relaxation time of mechanically aligned polystyrene thin films /". View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?PHYS%202003%20SHIU.
Texto completoYamamoto, Takashi. "Studies on long time relaxation of multi-arm star polymers". 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/148862.
Texto completoWan, Ke. "Estimation of Travel Time Distribution and Travel Time Derivatives". Thesis, Princeton University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3642164.
Texto completoGiven the complexity of transportation systems, generating optimal routing decisions is a critical issue. This thesis focuses on how routing decisions can be computed by considering the distribution of travel time and associated risks. More specifically, the routing decision process is modeled in a way that explicitly considers the dependence between the travel times of different links and the risks associated with the volatility of travel time. Furthermore, the computation of this volatility allows for the development of the travel time derivative, which is a financial derivative based on travel time. It serves as a value or congestion pricing scheme based not only on the level of congestion but also its uncertainties. In addition to the introduction (Chapter 1), the literature review (Chapter 2), and the conclusion (Chapter 6), the thesis consists of two major parts:
In part one (Chapters 3 and 4), the travel time distribution for transportation links and paths, conditioned on the latest observations, is estimated to enable routing decisions based on risk. Chapter 3 sets up the basic decision framework by modeling the dependent structure between the travel time distributions for nearby links using the copula method. In Chapter 4, the framework is generalized to estimate the travel time distribution for a given path using Gaussian copula mixture models (GCMM). To explore the data from fundamental traffic conditions, a scenario-based GCMM is studied. A distribution of the path scenario representing path traffic status is first defined; then, the dependent structure between constructing links in the path is modeled as a Gaussian copula for each path scenario and the scenario-wise path travel time distribution is obtained based on this copula. The final estimates are calculated by integrating the scenario-wise path travel time distributions over the distribution of the path scenario. In a discrete setting, it is a weighted sum of these conditional travel time distributions. Different estimation methods are employed based on whether or not the path scenarios are observable: An explicit two-step maximum likelihood method is used for the GCMM based on observable path scenarios; for GCMM based on unobservable path scenarios, extended Expectation Maximum algorithms are designed to estimate the model parameters, which introduces innovative copula-based machine learning methods.
In part two (Chapter 5), travel time derivatives are introduced as financial derivatives based on road travel times—a non-tradable underlying asset. This is proposed as a more fundamental approach to value pricing. The chapter addresses (a) the motivation for introducing such derivatives (that is, the demand for hedging), (b) the potential market, and (c) the product design and pricing schemes. Pricing schemes are designed based on the travel time data captured by real time sensors, which are modeled as Ornstein-Uhlenbeck processes and more generally, continuous time auto regression moving average (CARMA) models. The risk neutral pricing principle is used to generate the derivative price, with reasonably designed procedures to identify the market value of risk.
Yu, Wing-chi Gigi. "The effect of practice distribution on the training of laryngeal muscle relaxation". Click to view the E-thesis via HKU Scholors Hub, 2005. http://lookup.lib.hku.hk/lookup/bib/B3827940X.
Texto completo"A dissertation submitted in partial fulfilment of the requirements for the Bachelor of Science (Speech and Hearing Sciences), The University of Hong Kong, June 30, 2005." Also available in print.
Schumacher, Kimberly Lydia. "Femtosecond time-resolved intersubband relaxation measurements in GaAs/AlGaAs quantum wells". Thesis, University of Cambridge, 1995. https://www.repository.cam.ac.uk/handle/1810/270439.
Texto completoPon, Carlos (Carlos Roberto) Carleton University Dissertation Engineering Electronics. "Time warping - waveform relaxation (TW - WR) in a distributed simulation environment". Ottawa, 1995.
Buscar texto completoRaisuddin, K. B. M. "Relaxation methods for simulating large power systems". Ohio : Ohio University, 1989. http://www.ohiolink.edu/etd/view.cgi?ohiou1182457060.
Texto completoXu, Bo. "Proton NMR relaxation investigations of particle exfoliation and distribution in polymer/clay nanocomposites". Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/42936.
Texto completoParsaeian, Azita. "Fluctuations in the Relaxation of Structural Glasses". Ohio University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1257449080.
Texto completoDoran, Simon John. "An exploration of the role of relaxometry in quantitative magnetic resonance imaging". Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308229.
Texto completoSomani, Paritosh 1979. "Real time inventory tracking in distribution networks". Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/86736.
Texto completoIncludes bibliographical references (leaves 72-73).
by Paritosh Somani.
M.Eng.and S.B.
McFarr, Shawn y Paul Friedman. "Real-Time Telemetry Data Archival and Distribution". International Foundation for Telemetering, 1993. http://hdl.handle.net/10150/611855.
Texto completoHigh-performance telemetry systems traditionally store prime and processed data on disk drives attached to a host computer. Bandwidth performance of host minicomputer and disk drives limit the amount of data archived to aggregate rates of a few hundred kilobytes per second. Over the years, several approaches have been used to increase performance from pre-recorded analog tape, but real-time storage still required a large host and expensive proprietary parallel disk technology. The advent of distributed architecture system networks divorced the front-end telemetry processor from direct 'DMA' connections to the host. Today's technology moves data storage to the front end for the highest performance and outward to the network for less demanding archival rates. This paper explores several schemes and implementations for increased digital data archival performance in a distributed architecture Telemetry Ground Station. It goes on to discuss the variety of industry-standard devices and media available for storage at tens of megabytes per second on Redundant Arrays of Inexpensive Disks (RAID) to slower but much less expensive optical and streaming tape drives on both the front end and network computing resources. But storage is half the task; networks serve many users requiring archived data access. The paper will also show how the sophistication of today's modern Graphical User Interface (GUI) eases data distribution for Telemetry Ground Station engineers and analysts.
Cheng, Siuling. "Signal reconstruction from discrete-time Wigner distribution". Thesis, Virginia Tech, 1985. http://hdl.handle.net/10919/41550.
Texto completoWigner distribution is considered to be one of the most powerful tools for time-frequency analysis of rumvstationary signals. Wigner distribution is a bilinear signal transformation which provides two dimensional time-frequency characterization of one dimensional signals. Although much work has been done recently in signal analysis and applications using Wigner distribution, not many synthesis methods for Wigner distribution have been reported in the literature.
This thesis is concerned with signal synthesis from discrete-time Wigner distribution and from discrete-time pseudo-Wigner distribution and their applications in noise filtering and signal separation. Various algorithms are developed to reconstruct signals from the modified or specified Wigner distribution and pseudo-Wigner distribution which generally do not have a valid Wigner distributions or valid pseudo-Wigner distribution structures. These algorithms are successfully applied to the noise filtering and signal separation problems.
Master of Science
Hayes, Gary Robert. "Ultrafast relaxation processes in semiconductors studied by femtosecond time-resolved photoluminescence spectroscopy". Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263051.
Texto completoZybell, Sabine. "Relaxation dynamics in photoexcited semiconductor quantum wells studied by time-resolved photoluminiscence". Helmholtz-Zentrum Dresden - Rossendorf, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-197703.
Texto completoZybell, Sabine. "Relaxation dynamics in photoexcited semiconductor quantum wells studied by time-resolved photoluminiscence". Helmholtz-Zentrum Dresden - Rossendorf, 2015. https://hzdr.qucosa.de/id/qucosa%3A22319.
Texto completoZybell, Sabine. "Relaxation dynamics in photoexcited semiconductor quantum wells studied by time-resolved photoluminescence". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-187690.
Texto completoChang, Yung-Yeh. "A Time-efficient Method for Accurate T1 Mapping of The Human Brain". VCU Scholars Compass, 2011. http://scholarscompass.vcu.edu/etd/2626.
Texto completoPhillips, Paul Stewart. "Magnetic resonance line-shape and relaxation time studies of rotational diffusion in liquids". Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25956.
Texto completoScience, Faculty of
Chemistry, Department of
Graduate
Turo, Diego. "A relaxation approach for time domain modelling of sound propagation in porous media". Thesis, University of Salford, 2011. http://usir.salford.ac.uk/26948/.
Texto completoTan, Xin. "Molecular reorientational relaxation and excited state dynamics probed by time-resolved fluorescence spectroscopy /". The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486474078049178.
Texto completoNorthridge, Jedidiah 1976. "A federated time distribution system for online laboratories". Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/29384.
Texto completoIncludes bibliographical references (leaves 81-82).
The iLab project began in June of 2000 with the initial goal of creating Internet accessible laboratory experiments. After the successful implementation of several distinct laboratories, the goals of the project shifted to address the design and construction of a generalized infrastructure capable of supporting a wide variety of laboratory experiments. Early experiences suggested the need for a configurable experiment scheduling system. Such a system would be particularly important in the face of expected growth: as the number of providers and consumers grew, it would become crucial to empower providers with the ability to enforce experiment usage policies, to guarantee timely lab access to clients, and to maximize resource usage whenever possible. We will explore how the present iLab infrastructure can be modified to allow for experiment scheduling. This system would be designed in keeping with two key principles: generality and architectural consistency. It would have to support disparate scheduling algorithms of varying complexity and remain faithful to the theme and priorities of the existing iLab infrastructure. Design will be based on requirements gathering and the analysis of existing remotely available experiments. Resulting changes to the iLab infrastructure will be enumerated, justified, and their ramifications discussed. This design will be implemented and considered in the same fashion. Finally, future scheduling work within the context of iLab will be described.
by Jedidiah Northridge.
S.M.
Chen, Yiyang. "Semiparametric Bayesian model for response time distribution evaluation". The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1542122266368176.
Texto completoAnsari, Meisam. "REAL-TIME CONGESTION MANAGEMENT IN MODERN DISTRIBUTION SYSTEMS". OpenSIUC, 2021. https://opensiuc.lib.siu.edu/dissertations/1904.
Texto completoKang, Doo Sun. "Real-Time Demand Estimation for Water Distribution Systems". Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/193614.
Texto completoNdahimana, Joice y Tammar Issa. "Method development : follow liquid distribution in real time". Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-12813.
Texto completoKenny, Owen Patrick. "Theory of radar imaging using time-frequency distribution". Thesis, Queensland University of Technology, 1992. https://eprints.qut.edu.au/36211/6/36211_Digitised%20Thesis.pdf.
Texto completoLima, Maria Gabriela de Oliveira Lima Basto de. "Caracterização reológica e microstrutural de emulsões água em óleo para uso alimentar". Doctoral thesis, Universidade de Évora, 2014. http://hdl.handle.net/10174/13277.
Texto completoTanonkou, Guy Aimé. "Une approche par relaxation lagrangienne pour l'optimisation d'un réseau de distribution : modèles stochastiques et fiables". Metz, 2007. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2007/Tanonkou.Guy_Aime.SMZ0708.pdf.
Texto completoThis thesis deals with the development of models and heuristic algorithms for stochastic distribution network design problems. In the first part, the core decision problem lies in optimally designing a distribution network by finding the optimal distribution centers (DCs) location and the best supplier that would replenish the DCs. The first objective of this project is to join strategics decisions (location of DCs and supplier selection) and operational decision (inventory) in the same optimization model. The goal is to minimize the total fixed location cost, transportation cost, working-inventory cost. The problem is difficult to solve since it integrates all these decisions at the same time with non linear cost function to optimize. We provide an efficient technique which reduces system complexity. The second part of this thesis deals with the design of a distribution network where decisions must be made in the presence of uncertainty. Once the facilities have been constructed in the network, one or more of them may from time to time become unavailable because of some risks. To cope with this uncertain environment, we develop strategic decisions that take into account possible scenarios and strategies need to react when risk events occur. A two-period stochastic programming model is proposed. The goal is to minimize the total first stage cost plus the expected value of the random second stage cost taken trough all scenarios. As solution technique, we propose a Monte Carlo optimization approach combining the sample average approximation scheme and an efficient heuristic based on Lagrangian relaxation to generate efficient solutions and determine tight lower bounds
Tanonkou, Guy Aimé Xie Xiaolan Benyoucef Lyes. "Une approche par relaxation lagrangienne pour l'optimisation d'un réseau de distribution modèles stochastiques et fiables /". [S.l.] : [s.n.], 2007. ftp://ftp.scd.univ-metz.fr/pub/Theses/2007/Tanonkou.Guy_Aime.SMZ0708.pdf.
Texto completoSingh, Manish K. "Optimal Operation of Water and Power Distribution Networks". Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/86860.
Texto completoMaster of Science
The advent of smart cities has promoted research towards interdependent operation of utilities such as water and power systems. While power system analysis is significantly developed due to decades of focused research, water networks have been relying on relatively less sophisticated tools. In this context, this thesis develops Advanced efficient computational tools for the analysis and optimization for water distribution networks. Given the consumer demands, an optimal water flow (OWF) problem for minimizing the pump operation cost is formulated. Developing a rigorous analytical framework, the proposed formulation provides significant computational improvements without compromising on the accuracy. Explicit network conditions are provided that guarantee the optimality and feasibility of the obtained OWF solution. The developed formulation is next used to solve two practical problems: the water flow problem, that solves the complex physical equations yielding nodal pressures and pipeline flows given the demands/injections; and an OWF problem that finds the best operational strategy for water utilities during power outages. The latter helps the water utility to maximize their service time during power outages, and helps power utilities better plan their restoration strategy. While the increased instrumentation and automation has enabled power utilities to better manage restoration during outages, finding an optimal strategy remains a difficult problem. The operational and coordination requirements for the upcoming distributed resources and microgrids further complicate the problem. This thesis develops a computationally fast and reasonably accurate power distribution restoration scheme enabling optimal coordination of different generators with optimal islanding. Numerical tests are conducted on benchmark water and power networks to corroborate the claims of the developed formulations.
Shah, Falak Dipak. "Time-dependent behavior of pretensioned stainless steel bars used for structural rehabilitation and retrofitting". Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53063.
Texto completoJi, Ming Chao. "Molecular relaxation dynamics of Anthracene cations studied in an electrostatic storage ring". Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10051.
Texto completoThe polycyclic aromatic hydrocarbon (PAH) molecules have been considered as possible carrier of the unidentified infrared emission bands from the interstellar medium (ISM) for about thirty years. The cooling dynamics of the PAH molecules which is essential to estimate their photostability and therefore their lifetime and size distributions in the ISM, has attracted numerous theoretical and experimental studies. In recent years, electrostatic storage devices (ESD) became powerful tool to investigate the cooling regime of molecules and clusters in a large time range from microseconds to seconds. Generally speaking, the decay of the emitted neutral yields due to dissociation of molecular cations or electron detachment of anions in such experiments carries information on the internal energy of the stored molecular ions. In this thesis work, the cooling regimes of anthracene cations are studied by following the time evolution of the internal energy distribution (IED) of the stored anthracene cations. A spontaneous neutral yield curve obtained from the stored molecular ions as a function of the storage time shows three distinguishable regions. The three regions indicate different cooling regimes at corresponding storage time range, i.e., the dissociation mechanism of the molecule dominates at storage time t < 1 ms, quenching of the dissociation by radiative cooling processes occurs during 1 < t < 3 ms and radiative cooling governs at t > 3 ms
Pandit, Rajib K. "Local Fluctuations in the Relaxation Rate in Glassy Systems". Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1542389277929449.
Texto completoSabesan, Vaidhyanathan. "Detection and Frequency Estimation of Nonlinear Systems using Step Relaxation Technique". University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1505203318448279.
Texto completoGilbert, Valérie. "The effect of time-scale truncation and data errors on the linear relaxation spectrum". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1995. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/MQ37298.pdf.
Texto completo