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De, Grandpré Guillaume. "La dynamique locale : une porte d’entrée sur les mécanismes de formation de la phase vitreuse dans des molécules organiques". Mémoire, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/8363.
Pełny tekst źródłaAshkarin, Ivan. "Few-body Förster resonances in Rydberg atoms for the implementation of quantum computing". Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASP199.
Pełny tekst źródłaApplication of few-body Förster resonances for implementation of multiqubit quantum gate circuits has been investigated. New types of three-atom Borromean transitions based on the relay atom have been proposed and numerically studied. In particular, a Stark-controlled non-isolated three-atom Förster resonance between high-lying n = 80, 81, 82 S − P states of Rb atoms isolated in individual optical traps has been modeled. Isolated three-atom Förster resonance has also been demonstrated for n = 70, 71 states of Rb atoms. The resonances were investigated in a fixed spatial configuration, allowing us to demonstrate the coherent population and phase dynamics of the collective states involved. Three-qubit Toffoli gates schemes have been developed and numerically modeled based on the demonstrated resonances. Also, a generalized doubly controlled phase CCPHASE gate scheme has been developed based on the radiofrequency-induced three-body Förster resonance. Additionally, a similar quantum gate scheme has been proposed based on two-atom RF-induced Förster resonance with controlled displacement. The fast performance and high fidelity of the proposed schemes, as well as their potential robustness to errors, allow us to expect a successful experimental implementation in the near future
Messager, Valérie. "Nouveaux procédés pour la caractérisation cohérente d'impulsions Femtosecondes et pour la caractérisation des non linéarités du troisième ordre". Limoges, 2002. http://www.theses.fr/2002LIMO0044.
Pełny tekst źródłaThis first part of this work concerns a new method for characterization in amplitude and phase, of the temporal profile of femtosecondes pulses. This technique is based on shearing interferometry in the spectral domain. Spectral modulations are isolated with a fast time gating. A direct numerical procedure permits to extract the phase difference of the beatings before recovery of the temporal amplitude and phase distributions of the pulse. The second part deals with a new technique for third order nonlinearity measurements. It exploits the changes of femtosecondes excitation, due to self phase modulation in the nonlinear sample under test versus a varying dispersion introduced on the input pulses. These two processes temporally and spectrally modify the pulses. By fitting the experimental data with the curve obtained by numerical simulation of the device we derive the complex value of the non linearity together with its fast time response
Suicmez, Vural Sander. "Pore scale simulation of three-phase flow". Thesis, Imperial College London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.441972.
Pełny tekst źródłaPiri, Mohammad. "Pore scale modelling of three-phase flow". Thesis, Imperial College London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407699.
Pełny tekst źródłaAl-Gharbi, Mohammed Saif Hilal. "Dynamic pore-scale modelling of two-phase flow". Thesis, Imperial College London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409745.
Pełny tekst źródłaTopomondzo, Joseph Désiré. "Etude des effets de biréfringence induite dans les amplificateurs optiques à semi-conducteurs : applications dans les systèmes de communications optiques". Phd thesis, Télécom ParisTech, 2004. http://pastel.archives-ouvertes.fr/pastel-00001104.
Pełny tekst źródłaAl, Nahari Alhashmi Zaki Mahmoud Sharif. "Modelling single-phase fluid-fluid reactive transport at the pore-scale". Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/41967.
Pełny tekst źródłaSisavath, Sourith. "Fundamental pore-scale modelling of single-phase flow through sedimentary rocks". Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394470.
Pełny tekst źródłaCorreia, Márcia Sofia Barbosa. "Internship report in clinical studies coordination at IPO-Porto". Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/12949.
Pełny tekst źródłaThis report describes my activities as study coordinator (SC) intern, at the “Unidade de Investigação Clínica” (UIC) in the Oncology Portuguese Institute of Porto (IPOP). This training occurred during the second year of the Pharmaceutical Biomedicine Master at the University of Aveiro. My internship took place between 21st January, 2013 and 4th October, 2013 with the main objective to gain experience and expertise in oncology coordinating clinical trials. I present the state-of-the-art of clinical research with emphasis on current situation in Portugal as well as in oncology. At the beginning of internship I performed generic training in Good Clinical Practices (GCP) and Electronic Data Capture systems and familiarised myself with terminology and classification/assessment systems regarding the oncology area to support the clinical trial coordination activities in the context of the oncology protocols. In UIC, I participated in 6 phase II and 25 phase III clinical trials of 9 clinics of pathology: Urology, Gynaecology, Digestive, Lung, Soft Tissue and Skin, Head and Neck, Onco-Haematology, Breast and Paediatry. Within of these clinics, I intensively participated and acquired more autonomy in clinical trials of the Digestive pathology. The Onco-Haematology clinic includes the more complex procedures of the clinical trials protocols. As SC, I could intensively participate in the conduction clinical trial activities, namely: Randomisation Period, including Screening and Randomisation of patients, Clinic Visits and Monitoring Visits. The experience gained during my curricular internship was very enriching and enabled me to acquire professional and interpersonal skills and competences and to face unexpected situations, developing strategies to deal with them. Additionally, it was possible to consolidate and apply the theoretical knowledge acquired during Master Course in Pharmaceutical Medicine at different stages of clinical trials coordination. In conclusion, during my curricular internship, I gathered the competences, motivation and experience to pursue a career in clinical research, particularly, as SC.
Este relatório descreve as actividades como coordenadora de estudos estagiária, na Unidade de Investigação Clínica (UIC) do Instituto Português de Oncologia do Porto (IPOP). Este estágio foi parte integrante das actividades curriculares do segundo ano do Mestrado em Biomedicina Farmacêutica da Universidade de Aveiro. O estágio decorreu entre 21 de Janeiro de 2013 e 4 de Outubro de 2013, com o principal objectivo em adquirir experiência e especialização na coordenação de ensaios clínicos em oncologia. No documento é apresentado o estado de arte de arte da investigação clínica com ênfase na actual situação em Portugal bem como em oncologia. Na fase inicial do estágio realizei treino genérico em Boas Práticas Clínicas e sistemas de Captura de Dados Electrónicos e familiarizei-me com terminologia e sistemas classificação/avaliação próprios da área de oncologia para suportar as actividades de coordenação de ensaios clínicos no contexto dos protocolos de oncologia. Na UIC, participei em vários estudos de fase II e III de 9 clínicas de patologia: Urologia, Ginecologia, Digestivos, Pulmão, Pele e Tecidos Moles, Cabeça e Pescoço, Onco-Hematologia, Mama e Pediatria. Dentro destas clínicas, participei intensivamente e adquiri mais autonomia nos ensaios clínicos da patologia de Digestivos. A clínica de Onco-Hematologia, agrega os protocolos de ensaios clínicos com procedimentos mais complexos. Como coordenadora de ensaios clínicos pude participar intensivamente nas actividades de condução de um ensaio clínico, nomeadamente: Período de Randomização incluindo Rastreio e Randomização de doentes, Visitas Clínicas e Visitas de Monitorização. A experiência adquirida ao longo do estágio curricular foi muito enriquecedora e permitiu-me adquirir capacidades e competências profissionais e interpessoais e aprender a enfrentar situações inesperadas, desenvolvendo estratégias para lidar com as mesmas. Para além disso possibilitou-me a consolidar e aplicar os conhecimentos teóricos adquiridos no Curso de Mestrado nas diferentes fases de coordenação dos estudos. Em conclusão, ao longo do estágio adquiri competências, motivação e experiência para enveredar por uma carreira na área de investigação clínica, especialmente como Coordenadora de Ensaios Clínicos.
Cardoso, Ana Veronica Santos. "Pandemic Influenza A (H1N1)v in the North of Portugal - Epidemiology, Clinical Presentation and Prognosis during Containmente Phase". Master's thesis, Faculdade de Medicina da Universidade do Porto, 2009. http://hdl.handle.net/10216/50163.
Pełny tekst źródłaCardoso, Ana Veronica Santos. "Pandemic Influenza A (H1N1)v in the North of Portugal - Epidemiology, Clinical Presentation and Prognosis during Containmente Phase". Dissertação, Faculdade de Medicina da Universidade do Porto, 2009. http://hdl.handle.net/10216/50163.
Pełny tekst źródłaErnst, Vincent Y. "Caractérisation de deux-ports bruyants par la méthode de variation de phase/fréquence". Doctoral thesis, Universite Libre de Bruxelles, 1993. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/212776.
Pełny tekst źródłaFang, Wei. "Model-based retrieval of phase-related quantities for two-port microwave devices". Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/26900.
Pełny tekst źródłaDavis, R. G. "Two-port millimetre wave oscillators and their stabilisation with phase-locked loops". Thesis, Lancaster University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383542.
Pełny tekst źródłaMatharoo, Rishi. "1/f Additive Phase Noise Analysis for One-Port Injection Locked Oscillators". The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1430772754.
Pełny tekst źródłaHippauf, Felix. "Tailoring Pore Size and Polarity for Liquid Phase Adsorption by Porous Carbons". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-223482.
Pełny tekst źródłaDearie, Helen Sara. "Capillary electrochromatography on conventional and wide pore stationary phases". Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248374.
Pełny tekst źródłaSibold, Jeremias. "Phase separation of biomimetic membranes:". Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://hdl.handle.net/21.11130/00-1735-0000-0005-12CA-3.
Pełny tekst źródłaIrizarry, Julia Tonge. "Modeling the effects of three-dimensional pore geometry on gas hydrate phase stability". Thesis, University of Oregon, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1596317.
Pełny tekst źródłaPorous media affect hydrate stability by forcing hydrate-liquid interfaces to form high curvature geometries and by forcing the molecules of the hydrate, liquid, and sedimentary particles that compose the medium to interact where they are in close proximity. To evaluate these effects we first create synthetic spherical packings to approximate pore space geometry. We use the synthetic pore space to calculate the perturbation to the chemical potential caused by the geometrical constraints. Our model predictions agree with published data for ice-water and water-vapor systems. When particles are well-approximated as spheres, our model fits the data with R-squared values that range between about 80% to over 99%. However, our model needs to be improved for porous media that contain a significant fraction of non-equant particles such as clay. Lastly, we demonstrate how our model can be used in predictions for the evolution of hydrate saturation.
This thesis includes unpublished co-authored material.
Rabbani, Harris. "Pore-scale investigation of wettability effects on two-phase flow in porous media". Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/porescale-investigation-of-wettability-effects-on-twophase-flow-in-porous-media(4da35c39-fc12-4d2c-8645-53bb617696aa).html.
Pełny tekst źródłaIrizarry, Julia. "Modeling the Effects of Three-Dimensional Pore Geometry on Gas Hydrate Phase Stability". Thesis, University of Oregon, 2015. http://hdl.handle.net/1794/19304.
Pełny tekst źródłaErzeybek, Selin. "Pore Network Modeling Of Fissured And Vuggy Carbonates". Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609626/index.pdf.
Pełny tekst źródłas proven hydrocarbon reserves. It is essential to predict flow properties and understand flow mechanisms in carbonates for estimating hydrocarbon recovery accurately. Pore network modeling is an effective tool in determination of flow properties and investigation of flow mechanisms. Topologically equivalent pore network models yield accurate results for flow properties. Due to their simple pore structure, sandstones are generally considered in pore scale studies and studies involving carbonates are limited. In this study, in order to understand flow mechanisms and wettability effects in heterogeneous carbonate rocks, a novel pore network model was developed for simulating two-phase flow. The constructed model was composed of matrix, fissure and vug sub domains and the sequence of fluid displacements was simulated typical by primary drainage followed by water flooding. Main mechanisms of imbibition, snap-off, piston like advance and pore body filling, were also considered. All the physically possible fluid configurations in the pores, vugs and fissures for all wettability types were examined. For configurations with a fluid layer sandwiched between other phases, the range of capillary pressures for the existence of such a layer was also evaluated. Then, results of the proposed model were compared with data available in literature. Finally, effects of wettability and pore structure on flow properties were examined by assigning different wettability conditions and porosity features. It was concluded that the proposed pore network model successfully represented two phase flow in fissured and vuggy carbonate rocks.
Atig, Dyhia. "Propriétés physiques et mécaniques de l’hydrate de méthane à l’échelle du pore". Thesis, Pau, 2019. http://www.theses.fr/2019PAUU3021.
Pełny tekst źródłaGas hydrates are ice-like crystals stable at high pressure and low temperature. They are ubiquitous on earth, notably at the edges of continental shelves, where they contribute to the mechanical stability of marine sediments, by hydrate cohesion and hydrate adhesion to mineral particles. However, the mechanical behavior of gas hydrates at pore scale has been hardly or not at all studied. The purpose of this thesis is to study the stability conditions and the tensile mechanical properties of methane hydrate at pore scale in a representative pore habit of gas hydrate in a sedimentary medium.Here, using optical microscopy, first the formation, growth and dissociation conditions of methane hydrate are investigated across a water/CH4 interface in glass micro-capillaries used both as a pore model and as an optical cell resisting high pressure and low temperature. Then by developing a contactless and an in situ method, "thermally induced depressing", tensile mechanical properties of polycrystalline methane hydrate shell are determined. At low enough temperature, the hydrate nucleates as a polycrystalline "crust" over the water/CH4 interface. From this crust, the hydrate continues growing on both sides of the interface: in the water as "needle like crystals", in the gas as "hair like crystals", and finally between the gas and the substrate as a polycrystalline film, the "halo". The halo advances slowly on the substrate, riding over a water film, and comes to rest and adheres to the substrate. From then on, the "shell" (crust and halo) isolates the water from the gas. Tensile tests are carried out by generating a depression in the water compartment by increasing temperature at constant methane pressure.Tensile elastic properties of the shell (elastic modulus and the tensile strength) are determined as a function of the grain size, controlled here by two parameters, supercooling compared to the equilibrium temperature and the annealing time. We find elastoplastic behavior, with mixed ductile and brittle characteristics. Our data on tensile strength contribute to fit the gap of five orders of magnitude of grain size, and three orders of magnitude of tensile strength (between molecular simulations at nanometre scale and current experiment at millimetre to centimetre scale). The effect of grain size on the tensile strength of methane hydrate could be a factor contributing to the destabilization of continental slopes
REYNAL, SYLVAIN. "Transitions de phase dans les systèmes de spins régis par des interactions à longue portée". Phd thesis, Université de Cergy Pontoise, 2005. http://tel.archives-ouvertes.fr/tel-00010256.
Pełny tekst źródłaKayser, Avril Freda Francina. "The lived experiences of intermediate phase teachers of curriculum renewal processes from 1998 to 2012 in Port Elizabeth". Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1020063.
Pełny tekst źródłaFédou, Roland. "Modélisation de l'infiltration chimique en phase vapeur, CVI isotherme et isobare : étude de l'infiltration d'un pore rectiligne par diverses céramiques". Bordeaux 1, 1992. http://www.theses.fr/1992BOR10512.
Pełny tekst źródłaPuig, Montellà Eduard. "Modeling capillarity and two-phase flow in granular media : from pore-scale to network scale". Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAI046/document.
Pełny tekst źródłaNumerical simulations at the pore scale are a way to study the behavior of multiphase flows encountered in many natural processes and industrial applications. In this work, liquid morphology and capillary action are examined at the pore-scale by means of the multicomponent Shan-Chen lattice Boltzmann method (LBM). The accuracy of the numerical model is first contrasted with theoretical solutions. The numerical results are extended to complex microstructures beyond the pendular regime.The LBM has been employed to simulate multiphase flow through idealized granular porous media under quasi-static primary drainage conditions. LBM simulations provide an excellent description of the fluid-fluid interface displacement through the grains. Additionally, the receding phase trapped in the granular media in form of pendular bridges or liquid clusters is well captured. Unfortunately, such simulations require a significant computation time. A 2D model (Throat-Network model) based on analytical solutions is proposed to mimic the multiphase flow with very reduced computation cost, therefore, suitable to replace LBM simulations when the computation resources are limited. The approach emphasizes the importance of simulating at the throat scale rather than the pore body scale in order to obtain the local capillary pressure - liquid content relationships. The Throat-Network model is a starting point for the a hybrid model proposed to solve 3D problems. The hybrid model combines the efficiency of the pore-network approach and the accuracy of the LBM at the pore scale to optimize the computational resources. The hybrid model is based on the decomposition of the granular assembly into small subsets, in which LBM simulations are performed to determine the main hydrostatic properties (entry capillary pressure, capillary pressure - liquid content relationship and liquid morphology for each pore throat). Despite the reduction of computation time, it is still not negligible and not affordable for large granular packings. Approximations by the Incircle and the MS-P method, which predict hydrostatic properties, are contrasted with the results provided by LBM and the hybrid model. Relatively accurate predictions are given by the approximations
Mirabelli, Thomas G. "The effect of gravity on the evolution of pore and grain structure during liquid-phase sintering". Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/20021.
Pełny tekst źródłaScott, Brian Lee. "Fabrication and Characterization of a Porous Clad Optical Fiber Gas Sensor". Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/30906.
Pełny tekst źródłaMaster of Science
Soll, Wendy Eileen. "Development of a pore-scale model for simulating two and three phase capillary pressure-saturation relationships". Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/13899.
Pełny tekst źródłaAl-Dhahli, Adnan. "Pore- to field-scale modelling of three-phase flow processes in heterogeneous reservoirs with arbitrary wettability". Thesis, Heriot-Watt University, 2013. http://hdl.handle.net/10399/2646.
Pełny tekst źródłaShi, Zhang. "Pore-scale modelling of two phase flow in porous media with dynamic wettability and topological disorder". Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/23525.
Pełny tekst źródłaMancois, Vincent. "Non-equilibrium long-range phase transition in cold atoms : theory and experiment". Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS427.
Pełny tekst źródłaWe study the long-range force arising from the absorption of non-saturating laser beams in a two-dimensional cloud of cold atoms. The force created by the lasers is at- tractive and similar to the usual Newtonian gravity along the beam. The cloud is composed of bosonic strontium 88 cooled and trapped on the intercombination line. Transferring the atoms in a two-dimensional optical dipole trap in a magical wavelength configuration, a canonical non-equilibrium phase transition is expected. Below a critical temperature, self- gravitating particles in two dimensions can collapse, nearly by the same mechanism stars are forming. We observed experimentally transient compressions, a halfway satisfactory result originating from the power limitation of our dipole trap. The second part of the thesis focuses on the theoretical realization a minimal Brownian motor within a system of trapped particles in 2D, similarly to our experimental situation. The phenomenon char- acterizing the Brownian motor is the appearance of a macroscopic current of particles. We have shown that this direct transport of particles is independent of the details of the trapping potential and obtained if and only if two symmetries are jointly broken: By the presence of two heat baths along orthogonal directions together and an anisotropic trap misaligned from the temperature axes
Sousa, Fernando Rangel de. "Application du corrélateur " Five-Port " aux PLLs, à la récupération de porteuse et à un MODEM de télécommunications dans la bande 1,8 - 5,5 Ghz". Paris, ENST, 2004. https://pastel.archives-ouvertes.fr/pastel-00000987.
Pełny tekst źródłaThe five-port correlator accurately computes the complex ratio between two radiofrequency signals from the power values measured at the output of a five-port interferometer circuit. Its application has been reported in radars, DOA systems, direct conversion receivers and, as we propose in this work, in PLLs and carrier recovery loops. Whereas classic cartesian correlators project a vector representing a modulated signal over an orthogonal basis, the five-port correlator performs this projection over a \textsl{basis} composed of three vectors ideally phase-shifted of 120°. Thanks to the redundancy added by the third vector, the five-port correlator is less sensible to phase and amplitude imbalances, allows for the estimation of the IM2 products and operates in a wider frequency band. This PhD research contributes to the mobile radiocommunication area, in particular to the multi-mode and multi-band transceivers. The first contribution is the application of the five-port technique to reconfigurable phase-locked loops. Secondly, these reconfigurable loops are exploited in a multi-mode carrier recovery loop. Then, we present an original five-port characterization method. Finally, we propose and evaluate a novel transceiver architecture based on a three-vector basis
Urata, Yumi. "Effect of thermal pressurization with dilatancy and phase transitions of pore water on spontaneous dynamic rupture propagation". 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/157783.
Pełny tekst źródłaJonsson, Alexander. "Investigation of pore size effects at separation of oligonucleotides using Ion-pair RP HPLC : Examining of how the particle pore size of the stationary phase affects separations of oligonucleotides in therapeutic range". Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-73367.
Pełny tekst źródłaWilliams, Andrew Robert. "Cracking Potential and Temperature Sensitivity of Metakaolin Concrete". Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6603.
Pełny tekst źródłaXu, Zhi Guo. "An investigation of two-phase flow of organic working fluids in the inlet port of a Lysholm screw expander". Thesis, City University London, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294052.
Pełny tekst źródłaReynolds, Catriona Anne. "Two-phase flow behaviour and relative permeability between CO2 and brine in sandstones at the pore and core scales". Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/44499.
Pełny tekst źródłaKaufmann, Josef. "Experimental identification of damage mechanisms in cementitious porous materials on phase transition of pore solution under frost deicing salt attack /". Lausanne, 2000. http://library.epfl.ch/theses/?nr=2037.
Pełny tekst źródłaHippauf, Felix Verfasser], Stefan [Akademischer Betreuer] [Kaskel i Thomas [Gutachter] Henle. "Tailoring Pore Size and Polarity for Liquid Phase Adsorption by Porous Carbons / Felix Hippauf ; Gutachter: Thomas Henle ; Betreuer: Stefan Kaskel". Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://d-nb.info/1133110630/34.
Pełny tekst źródłaHippauf, Felix [Verfasser], Stefan [Akademischer Betreuer] Kaskel i Thomas [Gutachter] Henle. "Tailoring Pore Size and Polarity for Liquid Phase Adsorption by Porous Carbons / Felix Hippauf ; Gutachter: Thomas Henle ; Betreuer: Stefan Kaskel". Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://d-nb.info/1133110630/34.
Pełny tekst źródłaWeishaupt, Kilian [Verfasser], i Rainer [Akademischer Betreuer] Helmig. "Model concepts for coupling free flow with porous medium flow at the pore-network scale : from single-phase flow to compositional non-isothermal two-phase flow / Kilian Weishaupt ; Betreuer: Rainer Helmig". Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2020. http://d-nb.info/1215101848/34.
Pełny tekst źródłaDuhem, François. "Diagramme de phase du réseau Kondo : aspects statiques et dynamiques". Université Joseph Fourier (Grenoble), 1999. http://www.theses.fr/1999GRE10121.
Pełny tekst źródłaUzun, Ilkay. "Use Of Pore Scale Simulators To Understand The Effects Of Wettability On Miscible Carbon Dioxide Flooding And Injectivity". Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606876/index.pdf.
Pełny tekst źródłaC) is investigated. And it is found that, the increase in the intrinsic angles causes decrease in relative permeability values. As another scenario, two phase model is developed in which miscible CO2 &
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water is flooded after the primary drainage of the same 2-D network at supercritical temperature (32 °
C). This case is compared with the previous case and the effects of miscibility are investigated such that it causes the relative permeability values to increase. Adsorption is another concern of which its effects are analyzed in a single pore model. The model is compared with the reported experimental data at high temperature and pressures. A reasonable fit is obtained.
Dulina, I. O., T. F. Lobunets, L. O. Klochkov i A. V. Ragulya. "Synthesis of Ni/NiO Nanosize Powders with Different Phase Ratio by Thermal Decomposition of Nickel Acetate Amines". Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35125.
Pełny tekst źródłaSoulaine, Cyprien. "Modélisation des écoulements dans les garnissages structurés : de l'échelle du pore à l'échelle de la colonne". Thesis, Toulouse, INPT, 2012. http://www.theses.fr/2012INPT0089/document.
Pełny tekst źródłaStructured packings play a large role in chemical engineering processes involving gasliquid separation such as air distillation unit or CO2 absorption columns. Such structures maximize the exchange surface between gas and liquid while pressure drops remain low enough. Generally, the columns are operated in the counter-current flow mode : a liquid gravity film is sheared by the turbulent flow of a gas phase. The packings are made of an assembly of corrugated sheets where two adjacent sheets are respectively inclined by an angle and the opposite of this angle from the vertical axis. We can apprehend such a device as a bi-structured porous medium with high porosity defining two scales of description : a pore-scale and a macro-scale assimilated to the packing scale. Due to this peculiar structured geometry, the flow modeling from a macroscopic point of view, remains a challenging problem that has to be overcome to design enhanced devices. In particular, the macroscopic phenomena that leads to the spreading of a liquid point source at the top of a packing are still unknown, and the classical two-phase flow models in porous media failed to properly catch the liquid distribution within the column. Moreover, turbulence effects lead to additional difficulties. We developed a comprehensive mathematical model based on a multi-scale analysis to simulate gas-liquid flow through the distillation columns. We investigate three main points. First, we derived a Darcy-Forchheimer law that includes turbulence effects using the method of volume averaging. Then, to model the liquid spreading, we found convenient to split the liquid phase into two fictitious phases flowing along each sheet with a preferential direction. Moreover, these phases are not (except perhaps at very low saturation) completely independent since adjacent sheets are in contact and the liquid can flow from one sheet to the other. Finally, we proposed a macro-scale dispersion model to simulate two-phase, multicomponent transport in structured packing. All the effective properties that appear in this model are evaluated from either simulations or analytical solutions of the flow at the pore-scale. Simulation results have been successfully compared to laboratory-scale experiments and industrial-scale measurements
Singh, Kamaljit Engineering & Information Technology Australian Defence Force Academy UNSW. "Dynamics of residual non-aqueous phase liquids in porous media subject to freeze-thaw". Awarded by:University of New South Wales - Australian Defence Force Academy. Engineering & Information Technology, 2009. http://handle.unsw.edu.au/1959.4/44875.
Pełny tekst źródłaOliveira, Roberto Teodoro Gurgel de. "Modelo de ashkin-teller de tr?s cores na rede ponte de wheatstone". Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/16560.
Pełny tekst źródłaConselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico
In this work we study the phase transitions of the ferromagnetic three-color Ashkin-Teller Model in the hierarquical lattice generated by the Wheatstone bridge using real space renormalization group approach. With such technique we obtain the phase diagram and its critical points with respective critical exponents v. This model presents four phases: ferromagnetic, paramagnetic and two intermediates. Nine critical points were found, three of which are of Ising model type, three are of four states Potts model type, one is of eight states Potts model type and the last two which do not correspond to any Potts model with integer number of states. iv
Neste trabalho estudamos as transi??es de fase do modelo de Ashkin-Teller de tr?s cores ferromagn?tico na rede hier?rquica ponte de Wheatstone utilizando o m?todo de grupo de renormaliza??o no espa?o real. Com a utiliza??o desta t?cnica obtemos o diagrama de fases e seus pontos cr?ıticos com respectivos expoentes cr?ticos v. O modelo apresenta quatro fases: ferromagn?tica, paramagn?tica e duas intermedi?rias. Nove pontos cr?ıticos foram encontrados, sendo tr?s de classe de universalidade Ising, tr?s Potts de quatro estados, um Potts de oito estados e dois com classe de universalidade n?o correspondente a nenhum Potts com n?mero inteiro de estados