Дисертації з теми "Gas filters"
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Natvig, Ingunn Roald. "Gas cleaning with Granular Filters." Thesis, Norwegian University of Science and Technology, Department of Energy and Process Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-8822.
Повний текст джерелаThe panel bed filter (PBF) is a granular filter patented by A. M. Squires in the late sixties. PBFs consist of louvers with stationary, granular beds. Dust is deposited in the top layers and on the bed surface when gas flows through. PBFs are resistant to high temperatures, variations in the gas flow and hot particles. The filter is cleaned by releasing a pressure pulse in the opposite direction of the bulk flow (a puff back pulse). A new louver geometry patented by A. M. Squires is the filter tray louvers. The new design is believed to reduce the pressure drop and the number of louvers, and to make the filter more compact. We have designed and built a laboratory scale PBF with filter tray louvers based on the patent. Experiments with the prototype show that the new louver can be cleaned with a puff back pulse. A PBF system for a hypothetical biomass combustion plant has been designed. The heat from the flue gas will be used for district heating. The proposed PBF system design consists of double-sided modules with 46 filter tray louvers on top of each other. Five modules are mounted together in module columns, sharing the same clean gas duct and puff back pipe. The granular medium chosen is Sintered Bauxite 20/40 (SB). The module columns are placed in an enveloping house. SB and dust fall into bins in the bottom of the enveloping house during puff back cleaning. A vacuum pneumatic conveying system brings the dust and SB to the top of the filter. Dust and SB are separated in a sieve. Dust is deposited, and SB is transported back to the modules. NTNU is currently involved in the BioSOFC project. The objective of this project is to increase efficiency in energy production from biomass by using producer gas from a biomass gasification plant in a Solid Oxide Fuel Cell. Field tests will be performed at a plant in Güssing, Austria. A PBF will be used for gas filtration. The operating temperature will be 500 °C to avoid tar condensation. We have performed heating experiments on the BioSOFC filter system. The results were not satisfactory, as the temperature in the filter ranged from 384 to 625 °C. The filter system was due to be shipped, and new tests could not be performed. This work proposes that modifications to the heating cable circuits are made, and new heating tests are performed before the field testing.
Cheung, Chiu Kee. "Dry scrubbing of hydrogen chloride gas using ceramic filters." Thesis, University of Surrey, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362594.
Повний текст джерелаAlarfaj, Ayman Mohammed Abdullah. "Validation of low resistance filters for gas/vapour sampling." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4257.
Повний текст джерелаAlarfaj, Ayman M. A. "Validation of Low Resistance Filters for Gas/Vapour Sampling." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4257.
Повний текст джерелаKornelius, Gerrit. "The design of electrostatically augmented moving bed granular gas filters." Pretoria : [s.n.], 2003. http://upetd.up.ac.za/thesis/available/etd-05052005-095030/.
Повний текст джерелаCheung, Kerry. "Chip-scale quadrupole mass filters for a Micro-Gas Analyzer." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/52777.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (p. 181-188).
Mass spectrometers are powerful analytical instruments that serve as the gold standard for chemical analysis. This tool has numerous applications ranging from national security, industrial processing, environmental monitoring, space exploration, and healthcare to name a few. These systems are typically large, heavy, power-hungry, and expensive, constraining its usage to a laboratory setting. In recent years, there has been a growing interest in utilizing mass spectrometers outside the lab. Microelectromechanical systems (MEMS) technology holds the promise of making devices smaller, faster, better, and cheaper. The Micro-Gas Analyzer (MGA) project attempts to leverage MEMS capabilities to create a low-cost, high-performance, portable mass spectrometer. Batch-fabrication of various components for the MGA has been demonstrated to date, but the mass filter component still has room for exploration. Chip-scale quadrupole mass filters achieved entirely through wafer-scale processing have been designed, fabricated, and characterized. The device integrates the quadrupole electrodes, ion optics, and housing into a single monolithic block, eliminating the electrode-to-housing misalignments inherent in other quadrupoles. To achieve this integration, unconventional square electrode geometry was utilized. This concept formed the basis of the micro-square electrode quadrupole mass filter (MuSE-QMF). The MuSE-QMF demonstrated mass filtering with a maximum mass range of 650 amu and a minimum peak-width of 0.5 amu at mass 40, corresponding to a resolution of 80.
(cont.) More importantly, the design concept can be extended to complex architectures that were previously unachievable. Batch-fabricated quadrupoles in arrays, in tandem, or with integrated pre-filters can have significant impact on the future of portable mass spectrometry. Additionally, the MuSE-QMF makes a case for operation in the second stability region, and motivates new studies on quadrupole ion dynamics.
by Kerry Cheung.
Ph.D.
Lin, Ye Hone. "Evaluation of vibration responses of ceramic candle filters using an accelerometer and a laser vibrometer." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1369.
Повний текст джерелаCardador, Maza David. "Infrared optical filters based in macroporous silicon for espectroscopic gas detection." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/673046.
Повний текст джерелаLa detecció de gasos és de gran importància en àrees tan diverses com la indústria, la salut o la seguretat en entorns domèstics o espais públics, entre d'altres, i és altament específica per a cada aplicació. El mètode de detecció a utilitzar depèn de factors com ara el gas a detectar, el rang de concentració, la resolució requerida, la sensibilitat, l'especificitat, el temps de resposta, l'entorn operatiu (temperatura, humitat, espècies interferents, etc. .), la mida i el cost, entre altres consideracions. Els sensors òptics de gas són una solució atractiva per a la detecció de gas. La majoria d'ells es basen en l'absorció molecular i ofereixen respostes ràpides, deriva mínima i són intrínsecament fiables gràcies a la realització de mesures auto-referenciades. La sensibilitat i la selectivitat depenen de les característiques del dispositiu. Per exemple, els sensors de gas basats en tecnologia làser són altament selectius, no presenten resposta creuada a altres gasos i són altament sensibles. El desavantatge és que són cars. Els sensors d'infrarojos no dispersius (NDIR) són una alternativa molt estesa per a la detecció òptica de baix cost. Tenen un rendiment inferior en termes de sensibilitat i selectivitat que els sensors basats en làser, però són dos o tres ordres de magnitud més barats. Aquesta tesi està dedicada a millorar la selectivitat i la sensibilitat dels dispositius NDIR mitjançant la tecnologia de silici macroporós. Més específicament, estudia com els cristalls fotònics fabricats mitjançant el gravat electroquímic poden ser usats com a filtres estrets d'infraroig mitjà per a la detecció de gasos. És a dir, els cristalls fotònics estan dissenyats de tal manera que només un petit rang de freqüències d'una font externa es transmet mentre que els voltants estan bloquejats. Aquests filtres són més estrets que els disponibles en el mercat i poden utilitzar-se per millorar la selectivitat i la sensibilitat dels dispositius NDIR, així com per reduir la detecció creuada amb altres gasos. A més, l'estudi mostra com els cristalls fotònics de silici macroporós poden funcionar com a emissors selectius si són escalfats. Això pot ser usat per reduir la complexitat dels dispositius NDIR alhora que es mantenen característiques òptiques similars. A més, s'ha demostrat que les molècules fotòniques poden emprar-se per realitzar una detecció dual tant en la transmissió com en l'emissió, donant un nou enfocament a les mesures auto-referenciades. Les conclusions del treball mostren que la tecnologia de silici macroporós és una plataforma versàtil que proporciona solucions en el rang d'infraroig mitjà per al desenvolupament de sensors de gas òptics compactes, sensibles i selectius.
Kiriakidis, Alejandro C. "Implementation and application of NDE on ceramic candle filters." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2831.
Повний текст джерелаTitle from document title page. Document formatted into pages; contains xiv, 185 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 170-176).
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.
Повний текст джерелаRosepiler, Stephen G. "Performance evaluation of diesel particulate filters on heavy duty vehicles." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2867.
Повний текст джерелаTitle from document title page. Document formatted into pages; contains xii, 114 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 101-103).
Adigio, Emmanuel M. "Modelling gas flow pressure gradients in Gelcast ceramic foam diesel particulate filters." Thesis, Loughborough University, 2005. https://dspace.lboro.ac.uk/2134/33933.
Повний текст джерелаGonzalez, Sandra C. "Preparation and characterization of new porous ceramic filters for hot gas clean-up." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-12052009-020046/.
Повний текст джерелаPeng, Wu Tseng. "Evaluation of ceramic candle filters degradation and damage location using four-point bending tests." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=1105.
Повний текст джерелаTitle from document title page. Document formatted into pages; contains x, 85 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 81-82).
Simmons, Kathy. "An investigation into the deposition of particulate material on ceramic particle filters." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243347.
Повний текст джерелаCheung, W. F. "Filtration and cleaning characteristics of ceramic media." Thesis, University of Surrey, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234580.
Повний текст джерелаSwan, Dominic. "Stochastic load modelling in gas network analysis and design." Thesis, University of Exeter, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303776.
Повний текст джерелаAbbassian, F. "Long-running ductile fracture of high pressure gas pipelines." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372872.
Повний текст джерелаPalmer, Simon J. "Stabilisation of medium density polyethylene gas pipe in service applications." Thesis, Manchester Metropolitan University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329807.
Повний текст джерелаWilt, Glen A. "A parametric study of in-line filter holders." Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3710.
Повний текст джерелаTitle from document title page. Document formatted into pages; contains vii, 90 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 67).
Moles, Nathaniel. "Investigation of techniques and effects of diesel particulate filter cleaning." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4709.
Повний текст джерелаTitle from document title page. Document formatted into pages; contains xi, 110 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 87-92).
Payne, Simon Daniel. "Experimental studies of diesel particulate filtration." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610170.
Повний текст джерелаMathur, Pulkit V. D. "Fine-scale modeling of failure in an adhesive layer." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1454.
Повний текст джерелаTitle from document title page. Document formatted into pages; contains xviii, 70 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 68-69).
Leung, Susanna. "Biological Aerated Filters: Oxygen Transfer and Possible Biological Enhancement." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/76962.
Повний текст джерелаMaster of Science
Kamoun, Leila. "Etude de filtres MMIC hyperfréquences en technologies GaN et AsGa." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0265/document.
Повний текст джерелаThe aim of this work is to study “multi-functions” filters with an objective to reduce the dimensions of the circuits used for filtering functions in airborne systems. This work allows to obtain wide band notch filters (from 2 to 18 GHz) developed in MMIC technology using theEtude de Filtres MMIC Hyperfréquences en Technologies GaN et AsGa. 152GaN process and wide band filters developed in GaAs technology. The notch filters have been realized with two principles:- The first one based on coupled lines resonators structure. The prototype manufactured allow to validate the frequency tunability thanks to a variable load placed at the end of the coupled line. This can be realized with a varactor diode or with a cold transistor. These prototypes allow also validating the possibility for the circuit to work as an “allpass” filter or as a notch filter by applying a bias voltage on the transistors placed at the end of the coupled line.- The second one is based on the tenability of active filters by commuting between several channels thanks to a distributed structure. A prototype has been developed and manufactured in GaAs technology. This structure allow a frequency tunability with also the possibility to tune the bandwidth (by activating seeral channels with edge bandwidth), and a wide band matching. This structure allows to obtain frequency tunability (between 8.7 and 15.6 GHz) by applying a bias voltage on the active elements which brin gain (around 10 dB)
Ndinisa, Nkosinathi Vincent Chemical Sciences & Engineering Faculty of Engineering UNSW. "Experimental and CFD simulation investigations into fouling reduction by gas-liquid two-phase flow for submerged flat sheet membranes." Awarded by:University of New South Wales. School of Chemical Sciences and Engineering, 2006. http://handle.unsw.edu.au/1959.4/32872.
Повний текст джерелаAmes, Robin W. "Analysis of a 2007 EPA compliant diesel particulate matter sampling system." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5245.
Повний текст джерелаTitle from document title page. Document formatted into pages; contains xv, 133 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 91-95).
Rincón, Juan Pablo. "Development of a test facility to evaluate hot gas filtration characteristics of a candle filter." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2912.
Повний текст джерелаTitle from document title page. Document formatted into pages; contains xii, 121 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 117-119).
Karra, Jagadeswarareddy. "Development of porous metal-organic frameworks for gas adsorption applications." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/45751.
Повний текст джерелаMANSERVIGI, LUCREZIA. "Detection and classification of fults and anomalies in gas turbine sensors by means of statistical filters and machine learning models." Doctoral thesis, Università degli studi di Ferrara, 2021. http://hdl.handle.net/11392/2478821.
Повний текст джерелаMonitoring and diagnostics of gas turbines is a key challenge that can be performed only if the unit is equipped with reliable sensors, thus providing the actual operating condition of the energy system under investigation. Thus, the evaluation of sensor reliability is fundamental since only a reliable measurement can lead to proper decisions about system operation and health state. In fact, a faulty sensor may provide misleading information for decision making, at the expense of business interruption and maintenance-related costs. For this reason, this thesis develops, tunes and validates comprehensive methodologies for the detection and classification of both faults and anomalies affecting gas turbine sensors. This purpose is achieved by means of two different analyses and related tools. First, the Improved Detection, Classification and Integrated Diagnostics of Gas Turbine Sensors (I-DCIDS) tool is developed. The I-DCIDS tool comprises two kernels, namely Fault Detection Tool and Sensor Overall Health State Analysis (SOHSA). The former detects and classifies the most frequent fault classes. The latter evaluates the sensor overall health state. The novel diagnostic tool is suitable for assessing the health state of both single sensors and redundant/correlated sensors. The methodology uses basic mathematical laws that require some user-defined configuration parameters. Thus, a sensitivity analysis is carried out on I-DCIDS parameters to derive their optimal setting. The sensitivity analysis is performed on four heterogeneous and challenging field datasets referring to correlated sensors. Then, the I-DCIDS tool is validated by means of an additional field dataset, by proving its detection capability. Furthermore, the I-DCIDS tool is also exploited to evaluate the health state of several single sensors, by analyzing a huge amount of field data that refer to six different physical quantities. These analyses provide some rules of thumb for field operation, with the final aim of identifying time occurrence and magnitude of faulty sensors. The results demonstrate the diagnostic capability of the I-DCIDS approach in a real-world scenario. Moreover, the methodology proves to be suitable for all types of datasets and physical quantities and, thanks to its optimal tuning, also capable of identifying the actual time point of fault onset. A further challenge addressed in this thesis relies on the evaluation of raw data reliability, which may be compromised because of process anomalies. Such anomalies, which have been rarely investigated in the literature, may introduce errors whereby the unit of measure of a sensor is wrongly assumed. In this thesis such a situation is named Unit of Measure Inconsistency (UMI). Thus, this thesis is also aimed at identifying the approach that is mostly able to successfully detect UMI occurrence and classify unlabeled data. Among several alternatives, the capability of three supervised Machine Learning classifiers, i.e., Support Vector Machine, Naïve Bayes and K-Nearest Neighbors is investigated. In addition, a novel methodology, namely Improved Nearest Neighbor is proposed and investigated. The capability of each classifier is assessed by means of several analyses, so that the influence of the reliability of the data used for training the classifier and the number of classes is investigated. Among all tested approaches, the Naïve Bayes classifier and the novel Improved Nearest Neighbor prove to be the most effective, since they demonstrate their effectiveness, robustness and general validity in the majority of the cases. Thanks to the selected classifiers, the actual unit of measure of raw data can be provided and further sensor diagnoses can be safely performed. Finally, it has to be highlighted that all analyses reported in this thesis make use of field data acquired from sensors installed on Siemens gas turbines.
Thompson, Michael Thomas. "Fast amplitude and delay measurement for characterization of optical devices." Texas A&M University, 2006. http://hdl.handle.net/1969.1/4440.
Повний текст джерелаHuang, Xinyu. "Mechanics and Durability of Fiber Reinforced Porous Ceramic Composites." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/26063.
Повний текст джерелаPh. D.
Fargnoli, Amélia Giovana. "Estudo da compressibilidade de tortas de filtração de gases em filtros de tecido." Universidade Federal de São Carlos, 2010. https://repositorio.ufscar.br/handle/ufscar/4072.
Повний текст джерелаUniversidade Federal de Sao Carlos
A study on the compressibility of gas filtration cakes through their porosity investigation is presented in this work. The experimental unit consisted of a circular filter with a filtration area of 249 cm2 and a data acquisition system; mass flow rate and relative air humidity were controlled. The filter media used were a polyester felt (weighing 600 g/cm2) and an acrylic felt (weighing 550 g/cm2). A phosphate concentrate phosphate (ρp = 3.20 g/cm3 and dSt = 5.6 μm) and a magnesium silicate (talc) (ρp = 3.09 g/cm3 and dSt = 2.5 μm) were used as powder materials. Superficial filtration velocity was kept constant at 10 cm/s during phosphate concentrate filtration trials and five maximum pressure drops were set (100, 300, 600, 900 and 1200 mmH2O) at constant mass flow rate. Superficial filtration velocity was kept constant at 10 cm/s during talc filtration trials and four maximum pressure drops were set (300, 600, 900 and 1200 mmH2O) at constant mass flow rate. Trials at different filtration velocities (7.5 cm/s, 10 cm/s, 12.5 cm/s and 15.0 cm/s) were also performed. Initially, porosity data as a function of pressure drop per time were obtained. Each cake underwent a process to acquire the necessary resistance to be cut and embedded and then analyzed by a Scanning Electron Microscope. The obtained images were treated and analyzed in an image analyzing software which provided cakes porosity values. Afterwards, the influence of gas superficial velocity on average porosity was evaluated for cakes formed by talc powder. The porosity values obtained with the SEM images were compared to those obtained with equations found in the literature. A difference of 20 to 48% between experimental average porosity and estimated porosity was found for the phosphate concentrate cakes and of less than 13% for the talc cakes obtained at constant velocity. The average porosity values found for talc cakes were higher than those found for phosphate concentrate cakes, which was probably due to the fact that talc particles shape is extremely different from the spherical shape. A compressibility behavior for cakes of the two materials was possible to be observed. Talc cake porosity decreased with the increase of superficial filtration velocity.
Nesse trabalho apresenta-se um estudo da compressibilidade de tortas de filtração de gases através da investigação de sua porosidade. A unidade experimental consistiu de um filtro circular com área livre de filtração de 249 cm2, com vazão mássica e umidade relativa do ar controladas e um sistema de aquisição de dados. Os meios filtrantes utilizados foram um feltro de poliéster (gramatura 600 g/cm2) e um de acrílico (gramatura 550 g/cm2). Os materiais pulverulentos usados foram um concentrado fosfático (ρp = 3.20 g/cm3 e dSt = 5,6 μm) e um silicato de magnésio (talco) (ρp = 3,09 g/cm3 e dSt = 2,5 μm). Para os ensaios de filtração com a rocha fosfática foi fixada a velocidade superficial de filtração em 10 cm/s e cinco quedas de pressão máximas (100, 300, 600, 900 e 1200 mmH2O) à vazão mássica constante. Para os ensaios de filtração com o talco foi fixada a velocidade em 10 cm/s e quatro quedas de pressão máximas (300, 600, 900 e 1200 mmH2O) à vazão mássica constante. Também foram realizados ensaios para o talco a diferentes velocidades (7,5 cm/s, 10 cm/s, 12,5 cm/s e 15,0 cm/s). Inicialmente, obtiveram-se dados experimentais de porosidade em função da queda de pressão por tempo de filtração. Cada torta obtida passou por um tratamento para adquirir resistência necessária e ser analisada em um Microscópio Eletrônico de Varredura. As imagens obtidas foram tratadas e analisadas em um programa de análise de imagem fornecendo o valor da porosidade da torta. Posteriormente, analisou-se a influência da velocidade superficial de filtração na porosidade média de tortas de filtração formadas pelo talco. Compararam-se os valores de porosidade obtidos pelas imagens geradas no MEV com os obtidos por equações da literatura. Encontrou-se uma diferença de 20 a 48% entre os valores de porosidade média experimental e estimada para as tortas de rocha fosfática e de menos de 13% para o talco a velocidade constante. Os valores de porosidade média encontrados para o talco foram maiores que os encontrados para a rocha, provavelmente devido ao fato de que o formato das partículas de talco se distancia muito do formato esférico. Foi possível detectar um comportamento de compressibilidade para as tortas dos dois materiais. A porosidade das tortas de talco tendeu a diminuir com o aumento da velocidade superficial de filtração.
Nakamura, Masamichi, and Kazuhiro Yamamoto. "Simulation of heat conduction and soot combustion in diesel particulate filter." Inderscience publishers, 2012. http://hdl.handle.net/2237/20055.
Повний текст джерелаBohuš, Michal. "Návrh systému pro hlášení úniku plynu pomocí ultrazvukového mikrofonu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316449.
Повний текст джерелаSpinelle, Laurent. "Microsystèmes capteurs de gaz sélectifs au dioxyde d'azote associant structures semi-conducteurs et filtres chimiques (indigo ou/et nanomatériaux carbonés) destinés au contrôle de la qualité de l'air." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2012. http://tel.archives-ouvertes.fr/tel-00741969.
Повний текст джерелаPeterson, Emily Cassidy. "Shear-induced microstructure in hollow fiber membrane dopes." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50245.
Повний текст джерелаØdegård, Johnny. "Gas Cleaning with Granular Bed Filter." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-12892.
Повний текст джерелаSullivan, Michael R. "Leak detection in gas transmission pipelines." Thesis, Curtin University, 2003. http://hdl.handle.net/20.500.11937/881.
Повний текст джерелаSullivan, Michael R. "Leak detection in gas transmission pipelines." Curtin University of Technology, School of Engineering, 2003. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=15189.
Повний текст джерелаIt was clear early into the investigation that the majority of the errors within the leak detection model were created by random errors from the input field data. These non-systematic errors from the measurement data that included pressure and temperature, produced interference with model output. This interference resembled random “white” noise that was removed by a combination of well established data filtering techniques. The most appropriate process of calculating leak detection flow was determined after analysing the results of different techniques applied to large quantities of actual pipeline operating data. The validation of the on-line techniques developed provides a valuable resource for those wishing to implement similar leak detection schemes elsewhere. Furthermore a software environment was chosen which incorporated an open input and output platform for data that could be interfaced with any operating system. Therefore these techniques can be applied to the numerous Supervisory Control and Data Acquisition (SCADA) systems in operation throughout the gas transmission industry, to provide a low cost solution to leak monitoring.
Käll, Viktor, and Erik Piscator. "Particle Filter Bridge Interpolation in GANs." Thesis, KTH, Matematisk statistik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-301733.
Повний текст джерелаGenerative adversarial networks (GANs) är ett slags generativ modell som har fått mycket uppmärksamhet de senaste åren sedan de upptäcktes för sin potential att återskapa komplexa högdimensionella datafördelningar. Dessa förser en komprimerad representation av datan där enbart de karaktäriserande egenskaperna är bevarade, vilket följdaktligen inducerar ett avståndsmått på datarummet. Detta avståndsmått möjliggör interpolering inom datan vilket har åstadkommits med framgång tidigare. Häri föreslår vi en ny stokastisk interpoleringsmetod för GANs där interpolationen tvingas följa datafördelningen genom att implementera en sekventiell Monte Carlo algoritm för dragning av datapunkter. Resultaten för studien visar att metoden ger bättre interpolationer för datamängden LINES som användes; jämfört med resultaten av tidigare kända interpolationsmetoder syntes en märkbar förbättring genom kvalitativa och kvantitativa utvärderingar. Den framtagna interpolationsmetoden har alltså mött förväntningarna och är lovande, emellertid fordras att den testas på en mer komplex datamängd för att bekräfta att den fungerar väl även under mer generella förhållanden.
Martin, Graham S. "Theoretical and experimental studies of an aerosol coalescing fibrous filter." Thesis, University of Newcastle Upon Tyne, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265545.
Повний текст джерелаKuhl, David Derieg. "Assimilation of trace gas retrievals with the Local Ensemble Transform Kalman Filter." College Park, Md. : University of Maryland, 2009. http://hdl.handle.net/1903/9984.
Повний текст джерелаThesis research directed by: Dept of Atmospheric and Oceanic Sciences. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Lancaster, Greg A. "A Tunable Electromagnetic Band-gap Microstrip Filter." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/952.
Повний текст джерелаShinozaki, Osamu, Hirohide Furutani, Masaki Misawa, Naoki Takada, Kazuki Yamauchi, and Kazuhiro Yamamoto. "Lattice Boltzmann simulation on continuously regenerating diesel filter." The Royal Society, 2011. http://hdl.handle.net/2237/20056.
Повний текст джерелаTaylor, Eric. "Filter weighing procedure for 2007 and newer heavy duty diesel engines." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4788.
Повний текст джерелаTitle from document title page. Document formatted into pages; contains xii, 100 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 87-91).
Hanaki, Yasunari, and Kazuhiro Yamamoto. "Microfluidic Simulation of Diesel Exhaust Gas and Soot Oxidation in Diesel Particulate Filter." SAE International, 2013. http://hdl.handle.net/2237/20341.
Повний текст джерелаFranco, Kleber Serrão. "Filtração de gases a altas pressões." Universidade Federal de São Carlos, 2012. https://repositorio.ufscar.br/handle/ufscar/4106.
Повний текст джерелаThe filtration of gases is an important industrial operation with the primary aim of removing unwanted solid particles contained in a gas. The filtration of gases at high pressures is an operation widely used in natural gas industry with the aim of separating impurities called black powder, from rust inside pipelines along the transportation. These residues can cause wear on equipment such as, for example, rotor pump, obstruction of gauges and pressure decrease in product quality. Despite being an operation widely used, few studies exist in the area to study what the best type of filter. Therefore this study is very useful to improve the steps of transportation, measurement and purity of the final product. To simulate this process, we used the dry compressed air, injecting a phosphate rock as particulate matter. The filters were tested RAD cellulose and acrylic. The surface speed of filtration was kept constant at 0.05 m / s, throughout the filtering operation. The flow of compressed air used were 14 l / min to the total pressure 1 bar, 42 l / min at a total pressure of 3 bar and 86 l / min at a total pressure of 6 bar. Total load losses were 5, 10, 20 and 30 mbar. The results showed that, initially, the curves of head loss versus deposited mass showed the same growth trend. However, when forming a layer of cake from about 0.03 kg/m2, the filtrations higher pressures had lower pressure loss. This is because the larger pressure forming pies more porous and less resistant to air flow. At the end of the study it was also observed that the acrylic filter performed better compared to the cellulose RAD, due to its greater mass of accumulated dust and low pressure drop.
A filtração de gases é uma importante operação industrial com o principal intuito de remover as partículas sólidas indesejadas contidas em um determinado gás. A filtração de gases a altas pressões é uma operação muito utilizada na indústria de gás natural com o objetivo de separar as impurezas denominadas pó preto, provenientes da oxidação no interior de gasodutos ao longo do seu transporte. Estes resíduos podem causar desgaste de equipamentos como, por exemplo, rotor de bombas, obstrução de aparelhos de medição de pressão e diminuição da qualidade do produto. Apesar de ser uma operação muito utilizada, poucas pesquisas existem na área a fim de estudar qual o melhor tipo de filtro. Por isso este estudo é muito útil no sentido de melhorar as etapas de transporte, medição e pureza do produto final. Para simular este processo, foi utilizado o ar comprimido seco, injetando-se a rocha fosfática como material particulado. Os filtros testados foram de celulose RAD+ e acrílico. A velocidade superficial de filtração foi mantida constante em 0,05 m/s, durante toda a operação de filtração. As vazões do ar comprimido utilizadas foram de 14 l/min para a pressão total de 1 bar, 42 l/min para a pressão total de 3 bar e 86 l/min para a pressão total de 6 bar. As perdas de carga totais foram de 5, 10, 20 e 30 mbar. Os principais resultados mostraram que, inicialmente, as curvas de perda de carga versus massa depositada apresentaram igual tendência de crescimento. Porém, no momento que forma uma camada de torta a partir de aproximadamente 0,03 kg/m2, as filtrações de maiores pressões apresentaram menor perda de carga. Isso porque as maiores pressões formam tortas mais porosas e menos resistentes ao escoamento de ar. Ao final do estudo observou-se também que o filtro de acrílico obteve melhor desempenho comparado com o de celulose RAD+, por apresentar maior massa de pó acumulada e menor perda de carga.
Votava, Jakub. "Jednotka pro energetické využití kontaminováné biomasy." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228990.
Повний текст джерелаMader, Brian T. "Gas/solid and gas/particle partitioning of polychlorinated dibenzodioxins, polychlorinated dibenzofurans and polycyclic aromatic hydrocarbons to filter surfaces and ambient atmospheric particulate material /." Full text open access at:, 2000. http://content.ohsu.edu/u?/etd,193.
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