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Dissertations / Theses on the topic 'Dynamical filtrations'

Author: Grafiati

Published: 14 December 2024

Last updated: 31 July 2025

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1

Benzoni, Séverin. "Classification des filtrations dynamiques et étude des systèmes d'entropie positive." Electronic Thesis or Diss., Normandie, 2024. https://theses.hal.science/tel-04835404.

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Dans cette thèse, nous explorons les structures possibles des systèmes dynamiques de la forme $\bfX :=(X, \A, \mu, T)$ et leurs tribus facteur $\B \subset \A$. Les deux premiers chapitres étudient les différentes façons dont une tribu facteur $\B$ peut s'inclure dans un système dynamique $\bfX :=(X, \A, \mu, T)$, c'est-à-dire que nous étudions certaines structures possibles de l'\emph{extension} $\A \arr \B$. Dans le premier chapitre, nous considérons les concepts de \emph{super-innovations} et de \emph{standardité} des extensions, inspirés de la théorie des filtrations. Un point important est

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2

Lanthier, Paul. "Aspects ergodiques et algébriques des automates cellulaires." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMR034.

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La première partie de ce manuscrit entre dans le cadre de la théorie des probabilités, et est consacrée à l’étude de filtrations engendrées par des automates cellulaires. On étudie deux versions d’un automate algébrique agissant sur des configurations dont les états sont à valeurs dans un groupe abélien fini : l’une est déterministe, et consiste à additionner les états de deux cellules consécutives, et la seconde est une perturbation aléatoire de la première. À partir de ces automates, on construit des processus aléatoires markoviens et on étudie les filtrations engendrées par ces processus. O

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3

Khan, Muhammad Waleed. "Dynamic filtration at soil-geotextile interfaces." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/39882/.

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The soil-geotextile filtration mechanism is a complex process which depends on physical compatibility between the geotextile and the soil to be retained. Geotextiles often perform well under steady state conditions like those found in dams. However, when the soil-geotextile interface is subjected to dynamic loading, the requirements for successful filtering are uncertain and/ or conservative as the controlling factors are not well understood in these circumstances. There are few filter design criteria available for dynamic flow conditions. These criteria do not properly address the internal in

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4

Turkson, Abraham K. "Electro-ultrafiltration with rotating dynamic membranes." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=72036.

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In axial electrofiltration, a DC electric field is imposed between a rotating inner cylinder and a stationary outer cylinder giving rise to four mechanisms which act to minimize solute accumulation at the filter surface: turbulence, centrifugal force, electrophoresis and shear stress which removes solute aggregates.<br>Four dynamic membranes, Zr(IV) oxide, calcium oleate, poly-2-vinylpyridine and cadmium sulfide, were used to filter bovine serum albumin (BSA) in a disodium phosphate solution at pH = 8 and Prussian blue in distilled water. Prussian blue is a particle of 0.01(mu)m diameter with

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5

Schousboe, Frederik Carl. "Media Velocity Considerations in Pleated Air Filtration." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6632.

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Asset protection in the form of fluid filtration makes up an ever-increasing part of the civilized and industrialized world. Fluid filtration applications in the conditioned environment and life sciences are affording the world’s population a chance to better realize their potential, while industrial applications help ensure that high demand processes can be carried out safely, reliably, and effectively. In the present work, a tool has been developed, using the computational fluid dynamics package FLUENT, to allow the designer to better predict the magnitude of geometric imperfections within a

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6

Wang, Yuyan. "Simulation of pulsatile flow in baffled permeable channel for membrane filtration system." Thesis, University of Bath, 1993. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332793.

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7

FLEISCHMAN, GREGORY JOSEPH. "FLUID FILTRATION FROM CAPILLARY NETWORKS (MICROCIRCULATION, MATHEMATICAL MODELING)." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/187998.

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A mathematical model has been developed which describes the fluid exchange from a capillary network of realistic topology, and calculates the spatial distribution of extravascular pressure. In this model, the capillaries are represented by a superposition of sources and sinks, resulting from a D'Arcy's Law description of flow in tissue of uniform fluid conductivity. The combination of this representation and Starling's Hypothesis, which relates the forces influencing transmural fluid exchange, yields an integral equation of the second kind which is solved numerically for the source strength di

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8

Cao, Shiya. "Analysis of Household Water Filtration in China: A System Dynamics Model." Digital WPI, 2018. https://digitalcommons.wpi.edu/etd-theses/1268.

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As the economy has been growing fast in China, Chinese people have more incomes and then higher standard of living. In the case of household water treatment, more and more urban residents in China use bottled water or water filtration system instead of tap water because people start to worry about polluted tap water. According to a survey from China Water Supply Services Promotion Alliance in 2014, 59% of urban residents drinking water is from tap water (after being boiled), 41% from bottled water and water filtration system. The 41% participants prefer bottled water as the first choice over a

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9

Arthur, Kevin Gordon. "An experimental and theoretical study of the filtration characteristics of water-based drilling muds." Thesis, Heriot-Watt University, 1986. http://hdl.handle.net/10399/1082.

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10

Roberts, Mark. "Assessment of glomerular dynamics in human pregnancy using theoretical analysis and dextran sieving coefficients." Thesis, University of Newcastle Upon Tyne, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336811.

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11

Hameiri, Avikam. "Soil/geotextile filtration behavior under dynamic conditions of cyclic flow and vibration." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0016/NQ48642.pdf.

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12

Zhang, Wenxiang. "Optimization of protein concentration from alfalfa juice by high shear rate dynamic filtration." Thesis, Compiègne, 2016. http://www.theses.fr/2016COMP2281/document.

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Les protéines extraites des feuilles de luzerne sont une source importante de protéines. La filtration membranaire, technologie de séparation respectueuse de l’environnement avec une productivité élevée et de faible coût a été utilisée pour séparer et concentrer les protéines des feuilles de luzerne à partir de leur jus. Cependant le phénomène du colmatage de la membrane qui réduit sérieusement le flux et la séparation des protéines est un facteur limitant important dans l'application de la filtration membranaire. Pour améliorer la récupération des protéines et amenuiser le phénomène du colmat

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13

Lukins, Halcyon Josephine. "Dynamics of the waterborne stage of Myxobolus cerebralis estimated directly by packed-bed filtration." Thesis, Montana State University, 2004. http://etd.lib.montana.edu/etd/2004/lukins/LukinsH0805.pdf.

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14

Al-Hajeri, Mohammad Hamad. "Characterization of the fluid flow associated with ceramic candle filters." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323258.

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15

Azadi, Azin. "A 'dynamic' tissue model of glomerular filtration barrier maintenance, adaptation and potential pathways to failure." Thesis, Azadi, Azin (2022) A 'dynamic' tissue model of glomerular filtration barrier maintenance, adaptation and potential pathways to failure. PhD thesis, Murdoch University, 2022. https://researchrepository.murdoch.edu.au/id/eprint/66252/.

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The glomerular filtration barrier (GFB), within the kidney, is known to act as a filter. It must work effectively over its lifespan, avoiding common filter problems such as clogging. Previous mathematical studies mostly just considered how the GFB acts as a size and charge selective barrier. In contrast, here the aim is how the GFB continues to work long-term, despite its environmental changes. The overarching hypothesis presented here is that the tissue is continuously renewing, as podocyte-synthesized molecules are transported ‘upstream’ against the filtrate across the glomerular basement me

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16

Sendekie, Zenamarkos Bantie. "Clogging dynamics of particles and bacteria in microfluidic systems mimicking microfiltration processes." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30355/document.

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L'objectif de cette thèse est de progresser dans la compréhension du colmatage lors de la filtration de la matière molle (particules colloïdales et bactéries) et d'étudier l'efficacité et la faisabilité de séparateurs microfluidiques. Ces recherches sont réalisées avec des puces microfluidiques constituées de canaux dont la taille est du même ordre de grandeur que les objets filtrés. Ces puces, conçues pour représenter les processus ayant lieu en microfiltration frontale et tangentielles, permettent d'observer in-situ sous microscope les mécanismes de colmatage. Le système est instrumenté avec

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17

Saleem, Mubbshir. "Application of dynamic membranes in wastewater treatment." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3422308.

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The research highlighted the performance of dynamic membrane (DM) in most challenging conditions where advanced technologies like MBR etc. have been successfully applied. In this regard, treatment of old landfill leachate, production of bio hydrogen and enrichment of Anammox bacteria was mostly focused. The research also presented the strategies to expedite the formation of DM under both aerobic and anaerobic conditions. Pneumatic In situ cleaning mechanism was also proposed and proved to be effective in speedy and effective permeability recovery of excessively fouled DM under anaerobic condit

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18

Abdullah, Syed Zaki. "Investigation of effect of dynamic operational conditions on membrane fouling in a membrane enhanced biological phosphorus removal process." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/264.

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The membrane bioreactor (MBR) is becoming increasingly popular for wastewater treatment, mainly due to its capability of producing high quality effluent with a relatively small footprint. However, high plant maintenance and operating costs due to membrane fouling limit the wide spread application of MBRs. Membrane fouling generally depends on the interactions between the membrane and, the activated sludge mixed liquor, which in turn, are affected by the chosen operating conditions. The present research study aimed to explore the process performance and membrane fouling in the membrane enhanced

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Abdullah, Syed. "Investigation of effect of dynamic operational conditions on membrane fouling in a membrane enhanced biological phosphorus removal process." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/264.

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The membrane bioreactor (MBR) is becoming increasingly popular for wastewater treatment, mainly due to its capability of producing high quality effluent with a relatively small footprint. However, high plant maintenance and operating costs due to membrane fouling limit the wide spread application of MBRs. Membrane fouling generally depends on the interactions between the membrane and, the activated sludge mixed liquor, which in turn, are affected by the chosen operating conditions. The present research study aimed to explore the process performance and membrane fouling in the membrane enhanced

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20

SANTOS, PAULO ROBERTO DA FONSECA. "EVALUATING CHARACTERISTICS OF STATIC AND DYNAMIC FILTRATION OF A FLUID USED IN HYDRAULIC FRACTURING AT ROOM TEMPERATURE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1989. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33262@1.

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Este trabalho teve como objetivo estudar as características de filtração estática e dinâmica de um fluido usado em fraturamento hidráulico à temperatura ambiente. Para sua realização foi projetado, desenvolvido e qualificado metrologicamente um simulador que permitisse efetuar testes de filtração estática e dinâmica. Foram realizadas filtrações com um fluido newtoniano (água) e um não newtoniano (HPGUAR-BO lbm/1000gal).<br>This research intended to study the characteristcs of dynamic and static leakoff of a fluid in hydraulic fracturing at room temperature. A test apparatus was designed, cons

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21

Mentesidis, Anastasios. "Experimental Evaluation of the Effects of Dynamic Pressure on Improving Cement-based Grout Penetrability : A study performed with the short slot." Thesis, KTH, Jord- och bergmekanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-165034.

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The increasing need for watertight underground works, such as tunnel excavations, has sparked an interest in a number of research studies with grout penetrability being the focus. The research has so far contributed to a deeper understanding regarding the assessment of a successful grouting operation from different perspectives such as choice of equipment, material properties, phase planning and performance. It is well established that several crucial factors influence the penetrability of grouts with pressure type and magnitude being two of them. Researchers have examined this issue from dif

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22

Khan, Wasiq. "A Novel Approach for Continuous Speech Tracking and Dynamic Time Warping. Adaptive Framing Based Continuous Speech Similarity Measure and Dynamic Time Warping using Kalman Filter and Dynamic State Model." Thesis, University of Bradford, 2014. http://hdl.handle.net/10454/14802.

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Dynamic speech properties such as time warping, silence removal and background noise interference are the most challenging issues in continuous speech signal matching. Among all of them, the time warped speech signal matching is of great interest and has been a tough challenge for the researchers. An adaptive framing based continuous speech tracking and similarity measurement approach is introduced in this work following a comprehensive research conducted in the diverse areas of speech processing. A dynamic state model is introduced based on system of linear motion equations which models the i

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23

Xie, Xiaomin. "Investigation of Local and Global Hydrodynamics of a Dynamic Filtration Module (RVF Technology) for Intensification of Industrial Bioprocess." Thesis, Toulouse, INSA, 2017. http://www.theses.fr/2017ISAT0020/document.

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Cette thèse porte sur la compréhension et le contrôle des interactions dynamiques entre les mécanismes physiques et biologiques en considérant un procédé alternatif de séparation membranaire pour les bioprocédés industriels. L’objectif premier est un apport de connaissances scientifiques liées à la maîtrise de la bioréaction en considérant l'hydrodynamique complexe et les verrous rétention-perméation. Une technologie de filtration dynamique, appelée Rotating and Vibrating Filtration (RVF), a été spécifiquement étudiée. Elle se compose de cellules de filtration en série comprenant deux membrane

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24

Zoccola, Gregg. "Effect of conditioning on the performance of a plate and frame filter press." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43077.

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Experiments were performed on samples of alum, anaerobically digested, and aerobically digested sludges to determine optimum polymer dosages for various mixing intensities produced during conditioning by a high-stress mixing unit. Mean velocity gradient (G) values were established for each of the mixing speeds used ranging from 250 sec -1 to 4,000 sec-1. Using the optimum conditioning dosages determined each mixing speed, batches of optimally, conditioned sludge were introduced into a pilot scale plate and frame filter press. Filtrate volume per unit time and final cake solids were

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Meng, Bowen. "State of the Art Report on Cement Based Grout Properties and Dynamic Grouting." Thesis, KTH, Jord- och bergmekanik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-302699.

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Dynamic grouting in rock mass has been studied since 1985 while desired penetration in rock masses with fine fractures is still a challenge because of uncertainty and complexity in the grouting process. This has attracted the attention of researchers in different countries and regions, especially in some Nordic countries such as Sweden. This study presents a comprehensive review of grouting relevant research, including factors that influence penetration, different evaluation systems (equipment, and methods), and a variety of grouting techniques. Filtration as the main obstacle is a tendency th

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Francis, Patrick. "Modeling of controlled-shear affinity filtration using computational fluid dynamics and a novel zonal rate model for membrane chromatography." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/39128.

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Controlled-shear affinity filtration (CSAF) is a novel integrated bioprocessing technology that positions a rotor directly above an affinity membrane chromatography column to permit protein capture and purification directly from cell culture. The rotor provides a tunable shear stress at the membrane surface that inhibits membrane fouling and cell cake formation allowing for a uniform filtrate flux that maximizes membrane column performance. However, the fundamental hydrodynamics and mass transfer kinetics within the CSAF device are poorly understood and, as a result, the industrial applicabi

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Braak, Etienne. "Aération pour le décolmatage dans les bioréacteurs à membranes immergées pour le traitement des eaux usées : impact sur le milieu biologique et la filtration." Phd thesis, Toulouse, INPT, 2012. http://oatao.univ-toulouse.fr/8859/1/braak.pdf.

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Cette étude présente les travaux réalisés pour comprendre l'effet de l'aération sur le milieu biologique et sur la filtration dans les bioréacteurs à membranes immergées pour une gamme de paramètres opératoires proche de celles utilisées sur stations réelles. Notre démarche fait le lien entre paramètres opératoires (débit d'aération), hydrodynamique à l'échelle macroscopique (tailles et vitesses de bulles), hydrodynamique à l'échelle locale (contraintes de cisaillement) et propriétés du milieu biologique (taille de flocs et substances polymériques extracellulaires solubles). De moins bonnes p

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Kampel, Guido. "Mathematical modeling of fines migration and clogging in porous media." Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19764.

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Thesis (Ph.D)--Mathematics, Georgia Institute of Technology, 2008.<br>Committee Chair: Goldsztein, Guillermo; Committee Member: Dieci, Luca; Committee Member: McCuan, John; Committee Member: Santamarina, Juan; Committee Member: Zhou, Haomin.

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Günther, Jan. "Caractérisation et optimisation des phénomènes de transfert dans un double bioréacteur à membranes." Thesis, Toulouse, INPT, 2009. http://www.theses.fr/2009INPT047G/document.

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L'idée de base est de permettre à deux microorganismes de partager le même environnement tout en les maintenant séparées à l'aide d'une membrane perméable les retenant sélectivement. La principale contrainte résulte du transfert des composées d'intérêts limité par l'écoulement dans et autour des fibres ainsi que dans module et par le colmatage. Le double bioréacteur a membrane étudié dans cette thèse, de par son fonctionnement, alterne les cycles de filtration et rétrofiltration (ou rétrolavage), limitant ainsi en partie le colmatage. Ce travail de thèse s'est donc attaché à approfondir la con

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Smith, Everhardus Johannes. "A numerical analysis of the hydrodynamic mixing characteristics of a rectangular versus a cylindrical mixing crystallizer tank for a membrane distillation apparatus." Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2827.

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Thesis (MTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2018.<br>A membrane distillation crystallization (MDC) experimental setup was designed, constructed and commissioned with rectangular mixing crystallizer tanks. The advantages and disadvantages of a rectangular mixing tank are compared to the traditional cylindrical mixing tank with baffling by means of a computational fluid dynamic (CFD) analysis in Ansys Fluent. The effect of tank configuration and geometry on the hydrodynamic and mixing characteristics for efficient momentum, solid suspension, heat and mass t

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Zachar, Carrie L. "Pharmaceutically Relevant Microemulsions with Potential Topical, Ophthalmic, and Parenteral Applications." University of Toledo / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1271273404.

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El, Rayess Youssef. "Microfiltration tangentielle appliquée à l'oenologie : compréhension et maîtrise des phénomènes de colmatage." Thesis, Toulouse, INPT, 2011. http://www.theses.fr/2011INPT0089/document.

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La clarification des vins par procédés membranaires en particulier la microfiltration tangentielle a toujours été limitée par le colmatage, générant des flux de perméation faibles incompatibles avec la rentabilité économique. La compréhension, la maîtrise, ainsi que l'anticipation des phénomènes de colmatage font l'objet de ce travail. Dans un premier temps, la contribution individuelle puis en mélange des composés du vin (tannins, pectines, mannoprotéines et levures) au colmatage d'une membrane céramique multicanaux a été évaluée. Une approche fondamentale a permis de proposer des mécanismes

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Křížová, Aneta. "Vývoj biofyzikální interpretace dat kvantitativního fázového zobrazování." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401606.

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This doctoral thesis deals with biophysical interpretation of quantitative phase imaging (QPI) gained with coherence-controlled holographic microscope (CCHM). In the first part methods evaluating information from QPI such as analysis of shape and dynamical characteristics of segmented objects as well as evaluation of the phase information itself are described. In addition, a method of dynamic phase differences (DPD) is designed to allow more detailed monitoring of cell mass translocations. All of these methods are used in biological applications. In an extensive study of various types of cell

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Škutková, Helena. "Vyhodnocení příbuznosti organismů pomocí číslicového zpracování genomických dat." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-239861.

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This dissertation deals with alternative techniques for analysis of genetic information of organisms. The theoretical part presents two different approaches for evaluation of relationship between organisms based on mutual similarity of genetic information contained in their DNA sequences. The first approach is currently standardized phylogenetics analysis of character based records of DNA sequences. Although this approach is computationally expensive due to the need of multiple sequence alignment, it allows evaluation of global and local similarity of DNA sequences. The second approach is repr

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Nejad, Ghafar Ali. "An Experimental Study to Measure And Improve the Grout Penetrability." Licentiate thesis, KTH, Byggvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-184511.

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An essential demand in any underground facility is to seal it against the water ingress to reduce the time and cost of the construction and the corresponding environmental hazards. To achieve this, obtaining sufficient grout spread is of great importance. Among the grouts, cement grouts with lower costs and environmental issues have been more reliable, whereas their main problem is filtration that restricts the grout spread. Several investigations have been therefore aimed to develop instruments to measure the grout penetrability as a fundamental means to improve the grout spread. Due to the d

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Kampel, Guido. "Mathematical Modeling of Fines Migration snd Clogging in Porous Media." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19764.

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Mathematical Modeling of Fines Migration and Clogging in Porous Media Guido Kampel 87 Pages Directed by Dr. Guillermo H. Goldsztein A porous medium is a material that contains regions filled with fluid embedded in a solid matrix. These fluid filled regions are called pores or voids. Suspensions are fluids with small particles called fines. As a suspension flows through a porous material, some fines are trapped within the material while others that were trapped may be released. Filters are an example of porous media. We model filters as networks of channels. As a suspension flows across th

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Suttisansanee, Uthaiwan. "Biochemistry in Bacterioferritin." Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/2983.

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Bacterioferritin, an iron storage protein having a 24-subunit quaternary structure, was used as a model for the study of host-guest interactions and guest encapsulation, making use of its spherical cage-like structure. A hexahistidine-affinity tag fused to the C-terminus of each bacterioferritin subunit was constructed. The C-terminus of each subunit points toward the inside of the cavity, while the N-terminus is exposed on the surface of the protein. The hexaHistag was able to form strong interactions with a nickel-nitrilotriacetic acid linked dye molecule (guest) and this interactio

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Rainey, Thomas James. "A study into the permeability and compressibility of Australian bagasse pulp." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/30394/1/Tom_Rainey_Thesis.pdf.

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This is an experimental study into the permeability and compressibility properties of bagasse pulp pads. Three experimental rigs were custom-built for this project. The experimental work is complemented by modelling work. Both the steady-state and dynamic behaviour of pulp pads are evaluated in the experimental and modelling components of this project. Bagasse, the fibrous residue that remains after sugar is extracted from sugarcane, is normally burnt in Australia to generate steam and electricity for the sugar factory. A study into bagasse pulp was motivated by the possibility of making highl

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Rainey, Thomas James. "A study into the permeability and compressibility of Australian bagasse pulp." Queensland University of Technology, 2009. http://eprints.qut.edu.au/30394/.

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This is an experimental study into the permeability and compressibility properties of bagasse pulp pads. Three experimental rigs were custom-built for this project. The experimental work is complemented by modelling work. Both the steady-state and dynamic behaviour of pulp pads are evaluated in the experimental and modelling components of this project. Bagasse, the fibrous residue that remains after sugar is extracted from sugarcane, is normally burnt in Australia to generate steam and electricity for the sugar factory. A study into bagasse pulp was motivated by the possibility of making highl

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Neal, Peter Ross Chemical Sciences &amp Engineering Faculty of Engineering UNSW. "An examination of the nature of critical flux and membrane fouling by direct observation." Awarded by:University of New South Wales. School of Chemical Sciences and Engineering, 2006. http://handle.unsw.edu.au/1959.4/30584.

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Securing water in the right quantities at the right quality for the right price is a major issue around the world. Membranes are making an increasingly important contribution to meeting this need; however their performance is limited by fouling. This thesis reports on an investigation into the fouling of systems related to water treatment using the Direct Observation Through the Membrane (DOTM). The investigation focused on the measurement of critical flux and observation of particle behaviour under a variety of conditions and for a number of different particles. The range of meanings attribut

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Milučká, Daniela. "INFLATION DYNAMICS IN THE CZECH REPUBLIC: ESTIMATING THE NEW KEYNESIAN PHILLIPS CURVE." Master's thesis, Vysoká škola ekonomická v Praze, 2013. http://www.nusl.cz/ntk/nusl-199272.

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Recent breakthrough studies by Gali and Gertler (1999), Sbordone (2002) and Roberts (2001) argue that the New Keynesian Phillips curve (based on Calvo pricing model) is empirically valid concept and they conclude that the real marginal costs are preferred driving force to output gap in inflation dynamics for open economies. Neiss and Nelson (2002) and Gali, Gertler and Salido (2001), in turn, contradict that to date, there has been only little empirical evidence to support this statement. Neiss and Nelson (2002) add that "once output gap is defined consistently with economic theory, the gap-ba

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Куц, Юрій Вікторович, та Yurii Kuts. "Метод підвищення точності вимірювань радіосигналів при адаптивній фільтрації". Master's thesis, ТНТУ ім. І. Пулюя, Факультет прикладних інформаційних технологій та електроінженерії, кафедра біотехнічних систем, 2021. http://elartu.tntu.edu.ua/handle/lib/36525.

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В кваліфікаційній роботі розроблено алгоритм адаптивного пошуку оптимальних параметрів фільтра, зокрема, проведений аналіз досліджуваної системи на основі трьох вхідних сигналів: синусоїдальний, функція Хевісайду, імпульсний, та визначено що найбільш якісно та ефективно фільтрує сигнал фільтр Чебишева. Динамічна похибка із застосуванням цього фільтру зменшилася до 2 разів.<br>The qualification work developed an algorithm for adaptive search of optimal filter parameters, in particular, the analysis of the studied system based on three input signals: sinusoidal, Heaviside function, pulse, and de

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Akhlaq, Monis. "Improved performance high speed network intrusion detection systems (NIDS) : a high speed NIDS architectures to address limitations of packet loss and low detection rate by adoption of dynamic cluster architecture and traffic anomaly filtration (IADF)." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5377.

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Intrusion Detection Systems (IDS) are considered as a vital component in network security architecture. The system allows the administrator to detect unauthorized use of, or attack upon a computer, network or telecommunication infrastructure. There is no second thought on the necessity of these systems however; their performance remains a critical question. This research has focussed on designing a high performance Network Intrusion Detection Systems (NIDS) model. The work begins with the evaluation of Snort, an open source NIDS considered as a de-facto IDS standard. The motive behind the eval

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Oxarango, Laurent. "Transferts de Chaleur et de Masse dans des Structures Poreuses Multi-échelles : Application à l'étude des Filtres à Particules Diesel." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2004. http://tel.archives-ouvertes.fr/tel-00007594.

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Les filtres céramiques sont des dispositifs prometteurs pour diminuer les émissions de particules carbonées par les moteurs Diesel et respecter les futures normes environnementales. L'analyse et la modélisation des phénomènes physiques intervenant dans leur fonctionnement est indispensable pour améliorer leurs performances et leur durabilité. Dans une première partie, l'écoulement du gaz, le transport et la capture des particules au sein d'un filtre présentant une structure poreuse multi-échelle sont étudiés. Une approche de type « milieu poreux effectif» est adoptée pour simuler l'étape de fi

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Цюра, Надія Ярославівна. "Сумісний процес фільтрування та сушіння дисперсних матеріалів". Diss., Національний університет "Львівська політехніка", 2021. https://ena.lpnu.ua/handle/ntb/56692.

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Дисертаційна робота присвячена теоретичним та експериментальним дослідженням фільтраційного сушіння дисперсних матеріалів, зокрема Fe(II) сульфат гептагідрату, відпрацьованого деревного борошна й залізоокисного пігменту з метою проектування енергоощадного обладнання. Встановлені основні фізико-механічні характеристики стаціонарного шару досліджуваних матеріалів, а саме: насипна густина, пористість, питома поверхня, еквівалентний діаметр каналів, крізь якіфільтрується тепловий агент, усереднений діаметр частинок. На основі узагальнення результатів досліджень гідродинаміки запропоновані рівнянн

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PEREZ, Wanderlei Elias. "Avaliação do desempenho da filtração em múltiplas etapas (FiME) no tratamento da água do Ribeirão Sozinha em Goianápolis - Estado de Goiás." Universidade Federal de Goiás, 2009. http://repositorio.bc.ufg.br/tede/handle/tde/631.

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Made available in DSpace on 2014-07-29T15:01:50Z (GMT). No. of bitstreams: 1 Dissertacao - parte 1.pdf: 89652 bytes, checksum: 199b51d4bc46d91c1268d2961517e29e (MD5) Previous issue date: 2009-08-17<br>This work presents an evaluation of the performance of a multi-stage filtration system (FiME) in pilot-plant scale to treat surface water from the Ribeirão Sozinha stream which supplies the city of Goianápolis-GO, Brazil. The arrangement of the installation used in this study consisted of a dynamic roughing filter (PFD), a up-flow roughing filter (PFA) and two slow sand filters, being one with

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Falahati, Hamid. "The Characterization of Bimodal Droplet Size Distributions in the Ultrafiltration of Highly Concentrated Emulsions Applied to the Production of Biodiesel." Thesis, University of Ottawa (Canada), 2010. http://hdl.handle.net/10393/19585.

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A non-reactive model system comprising a highly concentrated and unstable oil-in-water emulsion was used to investigate the retention of oil by the membrane in producing biodiesel with a membrane reactor. Critical flux was identified using the relationship between the permeate flux and transmembrane pressure along with the separation efficiency of the membrane. It was shown that separation efficiencies above 99.5% could be obtained at all operating conditions up to the critical flux. It was observed that the concentration of oil in all collected permeate samples using the oil-water system was

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Callegaro, Giorgia. "Credit risk models under partial information." Doctoral thesis, Scuola Normale Superiore, 2010. http://hdl.handle.net/11384/85658.

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This Ph.D. thesis consists of five independent parts (Introduction included) devoted to the modeling and to studying problems related to default risk, under partial information. The first part constitutes the Introduction. The second part is devoted to the computation of survival probabilities of a firm, conditionally to the information available to the investor, in a structural model, under partial information. We exploit a numerical hybrid technique based on the application of the Monte Carlo method and of optimal quantization. As an application, we trace the credit spreads curve for zero

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友一, 吉田, та Yuichi Yoshida. "微粒子スラリーのろ過設計に関する研究". Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13071668/?lang=0, 2018. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13071668/?lang=0.

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粉体の微粒子化に伴い，固液分離操作の中でも高精度かつ多量処理が可能なろ過の重要性はますます高まっている．しかしながら，微粒子スラリーのろ過抵抗は非常に大きく，所望の処理能力を得られないことが多い．本論文では，ろ過操作設計におけるろ材抵抗，スラリー凝集・分散状態，ケークろ過抵抗の予測に関して数値シミュレーションを利用した検討を行うことで，微粒子スラリーのろ過抵抗の低減に有用な知見を得ることができた．<br>著者名の「吉」は「土」の下に「口」の置き換え<br>博士(工学)<br>Doctor of Philosophy in Engineering<br>同志社大学<br>Doshisha University

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ZHUANG, GING-RONG, and 莊清榮. "Study on filtration characteristics of rotating disk type dynamic filters." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/68112638437839782070.

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