Дисертації з теми "Design of Experiement (DOE)"
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Liang, Xiaohui. "A Design Experiment on Students' Perceptions of a Knowledge Management System." Thesis, University of Waterloo, 2002. http://hdl.handle.net/10012/958.
Повний текст джерелаGuerreiro, Luís Filipe Costa. "Automatic drilling improvement and standardization by design-of-experiments (DOE)." Master's thesis, Universidade de Évora, 2019. http://hdl.handle.net/10174/25737.
Повний текст джерелаJohansson, Robin. "Structural optimization of electronic packages using DOE." Thesis, KTH, Hållfasthetslära, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-285859.
Повний текст джерелаTillförlitligheten hos ett mekaniskt system med elektroniska kretsar påverkas starkt av miljön systemet används i. Skillnader och fluktuationer mellan omgivningens temperatur och arbetstemperaturen för de elektroniska kretsarna orsakar ackumulering av inelastiska töjningar, därmed förkortas det mekaniska systemets livstid. Dem vanligaste fel-moderna för en elektronisk krets har identifierats genom inspektion av felande maskiner som sprickbildning i lödfogarna och delaminering mellan processorn och dess lim. Kunskap hur förhållandet mellan parametrar som påverkar dessa fel-moder, vilka som är viktiga och vilka som inte är viktiga är av högt intresse vid utveckling av nya och redan existerande produkter. SAAB AB vill utveckla en metodik som utnyttjar statistisk försöksplanering för analyserande av elektroniska kretsar med hjälp av olinjära finita element metoder för att kunna spegla dess beteende på ett realistiskt sätt. En surrogatmodell skapades och parametriserades med hjälp av HyperMorph för att användas inom tre statiskt linjära varianter av statistisk försöksplanering, där både metodens prestanda och den relativa påverkan från parametrarna var av intresse. Ett kontaktvillkor implementerades för att tillåta relativ rörelse mellan komponenter samtidigt som nätet av finita element hölls intakt. Försöksplaneringsimuleringar utfördes med en Taguchi design, en Modified extensive lattice sequence design och en fractional factorial design, där de tre metoderna jämfördes mot varandra samt analyserades vad gäller respektive parametersignifikansen. Med optimering fanns sedan en optimal modell för att kunna jämföras med en nominell modell där en kryplag implementerades i lödfogen. Livslängden beräknades sedan för båda modeller.
Choi, Paul Koon Ping. "The use of design of experiments (DOE) : time for company management to decide." Thesis, University of the West of Scotland, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556176.
Повний текст джерелаNilsson, Marcus, and Johan Ruth. "SPC and DOE in production of organic electronics." Thesis, Linköping University, Department of Science and Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-6240.
Повний текст джерелаAt Acreo AB located in Norrköping, Sweden, research and development in the field of organic electronics have been conducted since 1998. Several electronic devices and systems have been realized. In late 2003 a commercial printing press was installed to test large scale production of these devices. Prior to the summer of 2005 the project made significant progress. As a step towards industrialisation, the variability and yield of the printing process needed to bee studied. A decision to implement Statistical Process Control (SPC) and Design of Experiments (DOE) to evaluate and improve the process was taken.
SPC has been implemented on the EC-patterning step in the process. A total of 26 Samples were taken during the period October-December 2005. An - and s-chart were constructed from these samples. The charts clearly show that the process is not in statistical control. Investigations of what causes the variation in the process have been performed. The following root causes to variation has been found:
PEDOT:PSS-substrate sheet resistance and poorly cleaned screen printing drums.
After removing points affected by root causes, the process is still not in control. Further investigations are needed to get the process in control. Examples of where to go next is presented in the report. In the DOE part a four factor full factorial experiment was performed. The goal with the experiment was to find how different factors affects switch time and life length of an electrochromic display. The four factors investigated were: Electrolyte, Additive, Web speed and Encapsulation. All statistical analysis was performed using Minitab 14. The analysis of measurements from one day and seven days after printing showed that:
- Changing Electrolyte from E230 to E235 has small effect on the switch time
- Adding additives Add1 and Add2 decreases the switch time after 1 and 7 days
- Increasing web speed decreases the switch time after 1 and 7 days
- Encapsulation before UV-step decreases the switch time after 7 days
Henriques, Francisco José da Silva. "O uso do DOE em conjunto com FTA no desenvolvimento e melhoria de projetos inovadores." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263938.
Повний текст джерелаDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica
Made available in DSpace on 2018-08-19T07:33:31Z (GMT). No. of bitstreams: 1 Henriques_FranciscoJosedaSilva_M.pdf: 2858744 bytes, checksum: 0cea615c3d9820b58bad6cb5d86648ee (MD5) Previous issue date: 2011
Resumo: O presente trabalho tem como objetivo apresentar e aplicar uma metodologia que possa ser utilizada nos diagnósticos de falhas, a priori, com causas desconhecidas ou diferentes das já conhecidas, por equipes de desenvolvimento de novos produtos. Esse tipo de falha acontece principalmente quando trata-se de produtos inovadores e ocorrem durante o processo de validação e mesmo após o início da produção. A metodologia se baseia na aplicação de Planejamento de Experimentos em conjunto com Árvore de Falhas para a quantificação das importâncias das causas raiz. Como resultado do trabalho é possível identificar quais parâmetros são os principais candidatos a causadores da falha e hierarquizar as causas. É possível ainda verificar as interações entre as causas, se existirem. A combinação entre métodos proposta pode ser inserida em metodologias de projeto consagradas, como o Projeto para Seis Sigma (DFSS), criando uma nova forma de desenvolver projetos inovadores
Abstract: The present work aims to present and apply a methodology that can be used on failures diagnosis, with unknown or different causes from those already known by the development team. This kind of failure happens mainly along the design of innovative products and occurs during the validation process or in the infant life phase. The methodology is based on Design of Experiments, which is applied together with Failure Tree Analysis to quantify the importance of each root cause. From the results of this work it is possible to identify what are the main causes related to the fault and rank them. It is also possible to verify whether there are interactions between the causes or not. The methodology proposed joining both methods can be inserted unusual design methodologies as Design of Six Sigma, creating a new way to develop and improve innovative designs
Mestrado
Mecanica dos Sólidos e Projeto Mecanico
Mestre em Engenharia Mecânica
Rådberg, Malin. "Design of Experiment for Laser cutting in Superalloy Haynes 282." Thesis, Karlstads universitet, Science, Mathematics and Engineering Education Research (SMEER), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-44516.
Повний текст джерелаProjektet syftar till att undersöka effekten på den laserskurna ytan då laserskärningsparametrar varieras. Parametrarna som varierades var skärhastighet, lasereffekt, gastryck och fokalpunkt. Den statistiska metoden Design of Experiments användes för att planera experimenten. Två stycken fullskaligt faktoriella försöksplaner skapades, en med argon som skärgas och en med kväve som skärgas. Undersökningen gjordes på plåt bestående av superlegeringen HAYNES ® 282 med en tjocklek på 2,54 mm. Provbitar från materialet skars ut utifrån försöksplanerna med olika laserinställningar under skärprocessen. Provbitarna utvärderades genom att mäta sprickor, tjockleken på det omsmälta materialet, ytojämnheten, gradhöjden och avståndet till laserstrålens avböjningspunkt på den laserskurna ytan. Resultaten användes för analys i det statistiska programmet Modde 10.1. Modde 10.1 bidrog med modeller av hög signifikans för responserna Recast layer, Tav; Recast layer, Tmax; Burrheight, max and Distance to deflection point för argonserien och Recast layer, Tav och Recast layer, Tmax för kväveserien. Resultaten visar att både tjockleken på omsmält material och gradhöjden avtar med ökande värden på skärhastighet, gastryck och fokalpunkt samt minskande värden på lasereffekt inom det undersökta parameterfönstret. De visade också att till laserstrålens avböjningspunkt på den laserskurna ytan ökade med ökande värden på gastryck och fokalpunkt och med minskande värden på skärhastighet och lasereffekt inom parameterfönstret. Resultaten visade också att de parametrar som i störst utsträckning påverkar tjockleken på det omsmälta materialet för provbitarna i argonserien är fokalpunkt och gastryck, medan det för kväveserien är gastryck och lasereffekt. Parametern som har högst inverkar på gradhöjden är skärhastigheten, medan fokalpunkt och gastryck har störst effekt på avståndet till laserstrålens avböjningspunkt på den laserskurna ytan. Om kväveserien och argonserien jämförs med varandra kan det observeras att argonserien generellt genererar mindre omsmält material än kväveserien från det att laserstrålen träder in i materialet till dess att den är mellan 60 och 80 % in i snittet, vartefter argonserien går förbi kväveserien i mängd omsmält material på majoriteten av mätställen.
Verlaan, Eric, Wouter Hendriksen, Rob Meulenbroek, and Prie Devlin du. "Design of Experiments (DOE) for Product and Process Improvements - 130: A Phenolic Syntan Case Study." Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34176.
Повний текст джерелаLindberg, Tomas. "An application of DOE in the evaluation of optimization functions in a statistical software." Thesis, Umeå universitet, Institutionen för matematik och matematisk statistik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-39507.
Повний текст джерелаBrown, William E. III. "Development Of Design Equations For A Square-tube Subbase Supporting A Shaft-mounted Speed Reducer." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/30983.
Повний текст джерелаMaster of Science
Chini, Marco. "Sviluppo di nuove metodologie di calibrazione per motori da competizione con tecniche di Design of Experiments." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18647/.
Повний текст джерелаVenturini, Giacomo. "Design of experiment analysis of air filter performance for helicopter applications." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
Знайти повний текст джерелаOh, Eun. "Study of Network Design Factors That Influence Industrial Fieldbus Network-Based System Integration." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243606788.
Повний текст джерелаFarias, Marcelo Fernandes. "Determinação da influência de parâmetros de processo de forjamento a quente utilizando DOE (projeto de experimentos)." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/170979.
Повний текст джерелаNowadays the Design of Experiments (DOE) has been widely used to determine the most significant project and process factors affecting a response variable and to establish empirical models among the factors, although this method is still little used and the process of hot forging. This work analyzes the individual and cumulative influence of some controllable parameters in a closed die hot forging process in the pressing force required for its realization. This analysis was performed using a Design of Experiments (DOE) method. To determine the influence of variable factors selected in response Design of Experiments (DOE), a several tests varying the lubricant, the diameter of the billet and the forging temperature was performed. The response variable for the experiment was defined as pressing force. For this study, it was used the ABNT 4140 steel provided in drawn bars of 28,6mm (1 1/8 ″). The fator that had more influence over the pressing force was the lubricant. Other factors, whether or not combined, did not show a significant influence on the response variable. This study demonstrates that it is possible use techniques to set hot forging process parameters reliably and without necesside the application of complex computer simulation programs or the trial and error system. Finally, this work reinforces the versatility of Design of Experiments (DOE) wich is still little used in forging processes.
Westbeld, Julius. "Investigation of support structures of a polymer powder bed fusion process by use of Design of Experiment (DoE)." Thesis, KTH, Lättkonstruktioner, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-243867.
Повний текст джерелаI detta examensarbete undersöks stödstrukturer för en polymer-pulverbaserad process kallad XXXXXXXX. Dessa strukturer är väsentliga för de flesta aditiv tillverkning. Med hjälp av metoden "Design of Experiment" (DoE) undersöks effekten av flera faktorer på fem industriellt viktiga egenskaper för stödstrukturer. DoE beskriver både planeringen och analysen av experiment. Experimenten planeras i en fraktionerad faktoriell 211-5 design med 64 provexemplar vilket resulterar i en upplösning av IV. Dataanalysen genomförs med hjälp av ANOVA-metoden, med vilken signifikansen av effekter och interaktionseffekter kan undersökas.
Khaddaj-Mallat, Chadi. "Design of experiments approach to the flooding of damaged ships." Ecole centrale de Nantes, 2010. http://www.theses.fr/2010ECDN0024.
Повний текст джерелаRoll-On/Roll-Off passenger vessels appear to be sensitive to rapid capsizing due to abrupt ingress of water caused by maritime accidents. As a result of the damage creation, the flooded ship can experience transient and progressive flooding phases (Intermediate Flooding Stages, IFS) which might be more devastating than the final condition, as the sudden loading could significantly alter the ship stability characteristics. An experimental investigation using the midsection of the PRR02 – ITTC/SiW Ro-Ro passenger ferry is undertaken to determine the influential factors within the IFS, and to reveal their individual influence, as well as their interactions. More importantly, it is devoted to hopefully provide profound insight into the flooding physics and look over the adequacy of the calm water condition to assess the IFS of such vessels. A novel-in-ocean-engineering methodology, the Design of Experiments (DOE), is used to plan systematic model tests, perform them, and analyze their results. During the IFS, a strong interaction is found between, on one hand, both implicated fluids, i. E. Water and air, and, on the other hand, the model geometry and behavior. The detection of three conspicuous peaks highlights this interaction. Moreover, a two-fold behavior is observed in the Engine Room partially submerged. These behaviors are drawn by the air compressibility, the water surface, as well as the sloshing occurring inside this room. The tests confirm that the discharge coefficient for realistic flooding situations is not constant during the flooding, and estimate it experimentally. Besides, a mathematical model characterizing the IFS is successfully built, then optimized. Regarding the global behavior of such vessels suffering from side damages, it is pointed out that the Damage Opening area, the external excitation, the initial draught, and the duration of damage creation most affect the IFS; then Engine Room-related parameters (permeability and layout) come with a relatively less influence. A relatively very little influence is found for Air-related parameters (cross-flooding and air-ventilation level). This study demonstrates the validity and efficiency of applying the DOE methodology in Damaged Survivability Domain, and establishes a suitable basis to elaborating a novel assessment procedure based on ‘interactive research’ to reliably assess the damaged survivability of such vessels. Furthermore, theoretical models and numerical codes can benefit of its achievements to improve their performance and credibility
Bloot, édina Lurdes. "Avaliação do uso de delineamento de misturas na formulação de massas cerâmicas multicomponentes." Universidade do Estado de Santa Catarina, 2010. http://tede.udesc.br/handle/handle/1773.
Повний текст джерелаCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
The response surface methodology applied to the technique of mixture experiments has been widely used in many fields of science and technology. The fundamental consideration is that a certain property depends on the component proportions, which constitute a material. The present work used the technique of mixture experiments to obtain multicomponent ceramic bodies suitable for the manufacture of ceramic tile products. In order to justify and correlate the results, the effects of structural and microstructural aspects of the green and fired materials on the final products properties were analyzed. The experimental procedure is comprised of a qualitative and quantitative understanding of the characteristics of raw materials, which constitutes the ceramic body, namely clays A and B, kaolin C, filliti D and E; a mixture design using a multicomponent mixture experiment; and a powder technology processing. The analysis of variance confirmed the significance of the models, but the variability coefficient R² indicated the influence of other factors on the studied properties than the raw materials. Additional experiments were conducted to validate the models. The models used did not allow an estimation of the properties to other compositions, which can be justified by the lack of replicas. The structural and microstructural characteristics, specially, crystalline and amorphous phases, and porosity, present in the green and sintered ceramic bodies, could be related to the properties, both measured and estimated according to the models. We obtained a range of formulations for ceramic tiles Category porous and semi-porous in terms of results. To obtain other types of ceramic tile as porcelain tile, new studies should be performed in processing conditions closer to those used in the coating industry, using new formulations.
A metodologia de superfície de resposta aplicada às técnicas de experimentos com mistura tem sido muito utilizada em várias áreas da ciência e tecnologia. A consideração fundamental é que uma determinada propriedade depende da fração dos componentes que constituem o material. O presente trabalho usou a técnica de experimentos com misturas para a obtenção de massas cerâmicas multicomponentes, destinadas a fabricação de revestimentos cerâmicos, visando a avaliação do uso da técnica de delineamento de misturas para composições utilizando cinco matérias-primas cerâmicas. A partir dos resultados da caracterização das massas cerâmicas obtidas e dos corpos-de-prova a verde e sintetizados, foram encontradas equações de regressão para as principais propriedades tecnológicas, como uma função dos componentes das misturas. A análise de variância confirmou a significância dos modelos, porém o coeficiente de variabilidade R² indicou a influência de outros fatores sobre as propriedades estudadas que não as matérias-primas. Foram realizados experimentos adicionais para a validação dos modelos, observou-se que os modelos utilizados não possibilitaram uma estimativa das propriedades para outras composições, o que pode ser justificado pela falta de réplicas. Entretanto as características microestruturais do material cerâmico obtido puderam ser correlacionadas com as propriedades medidas, justificando os resultados observados. Além disso, foi possível obter uma gama de formulações para revestimentos cerâmicos da categoria poroso e semi-poroso do ponto de vista das propriedades estudadas. Para obtenção de outras categorias de revestimento cerâmico como os porcelanatos, devem ser realizados novos estudos em condições de processamento mais próximas as utilizadas na indústria de revestimento, e utilizando novas formulações.
Clay, Stephen Brett. "Characterization of Crazing Properties of Polycarbonate." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/28648.
Повний текст джерелаPh. D.
Sabová, Iveta. "Plánovaný experiment." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231981.
Повний текст джерелаAmanna, Ashwin Earl. "Statistical Experimental Design Framework for Cognitive Radio." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/77331.
Повний текст джерелаPh. D.
Holec, Tomáš. "Plánovaný experiment." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254455.
Повний текст джерелаNelson, Benjamin D. "Using Design of Experiments and Electron Backscatter Diffraction to Model Extended Plasticity Mechanisms In Friction Stir Welded AISI 304L Stainless Steel." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2582.
Повний текст джерелаZavoli, Chiara. "Applicazione del metodo Design of Experiment per l’analisi del ciclo di decontaminazione con H2O2 nell’industria farmaceutica." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
Знайти повний текст джерелаREGO-TEIXEIRA, ANTONIO. "Etudes multi-parametriques des facteurs d'economie d'energie dans le batiment, fondees sur le logiciel caleco/doe. 2." Paris 7, 1987. http://www.theses.fr/1987PA077064.
Повний текст джерелаAbdalrahman, Rzgar. "Design and analysis of integrally-heated tooling for polymer composites." Thesis, University of Plymouth, 2015. http://hdl.handle.net/10026.1/4753.
Повний текст джерелаSatish, Prabhu Nachiketh, and Ranjan Tunga Sarapady. "Evaluation of parametric CAD models from a manufacturing perspective to aid simulation driven design." Thesis, Linköpings universitet, Maskinkonstruktion, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-167724.
Повний текст джерелаChantarat, Navara. "Modern design of experiments methods for screening and experimentations with mixture and qualitative variables." Columbus, OH : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1064198056.
Повний текст джерелаTitle from first page of PDF file. Document formatted into pages; contains xiv, 119 p.: ill. (some col.). Includes abstract and vita. Advisor: Theodore T. Allen, Dept. of Industrial and Systems Engineering. Includes bibliographical references (p. 111-119).
Sandqvist, Wedin Emma. "Optimization of Acidic Degradation of Hyaluronic Acid using Design of Experiments." Thesis, Linköpings universitet, Teknisk biologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-156273.
Повний текст джерелаTosto, Francesco. "Investigation of performance and surge behavior of centrifugal compressors through CFD simulations." Thesis, KTH, Mekanik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226159.
Повний текст джерелаAnvändningen av turboladdade dieselmotorer ärr numera utbredd inom bilindustrin: i synnerhet tunga fordon som lastbilar eller bussar ärr ofta utrustade med turbo-laddade motorer. En utförlig förståelse av flödesfältet som utvecklas innuti båda huvudkomponenterna hos en turboladdare, dvs kompressor och turbin, är därför nödvändig: den synergistiska användningen av CFD-simuleringar och experimentel-la tester möjliggör att detta krav uppfylls. Syftet med denna avhandling är att undersöka prestanda och det flödesfält som utvecklas i en centrifugalkompressor för turboladdare. Studien utförs genom nu-meriska simuleringar, både steady state och transient, baserat på RANS-modeller (Reynolds Averaged Navier-Stokes-ekvationer). Koden som används för de numeriska simuleringarna är Ansys CFX. Den första delen av arbetet ¨ar ett försöka att utveckla en CFD-metod för att förutsäga prestanda för en centrifugalkompressor med hjälp av steady-state RANS-modeller. De erhållna resultaten jämförs sedan med experimentella observationer. Studien fortsätter med en analys av känsligheten hos den utvecklade CFD-metoden till olika parametrar: Inflytande av både position och modell som används för rotor-statorgränssnitt samt axiellt spel mellan rotor och hus på de globala prestationerna studeras och kvantifieras. I andra delen utförs en designoptimeringsstudie baserad på Design of Experiments (DoE). I detalj används tidsupplösta RANS-simuleringar för att identifiera vilken utformning av ported shroud som minskar backflöde i kompressorn under en snabb minskning av massflöde och varvtal och därmed ger bättre prestanda i transient surge. På tunga fordon kan dessa förhållanden uppstå under växling.
Panieri, Marco. "Ottimizzazione mediante progetto dell'esperimento del processo di produzione di idrossiapatite drogata con magnesio." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017.
Знайти повний текст джерелаSmeliková, Lenka. "Kontrola kvality pájeného spoje a Design of Experiments u strojního pájení vlnou." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220991.
Повний текст джерелаBesirevic, Edin, and Anders Dahl. "Variance reduction of product parameters in wire rope production by optimisation of process parameters." Thesis, Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-63634.
Повний текст джерелаDet senaste årtiondet har användningen av statistiska metoder inom tillverkningsindustrin resulterat i kvalitetsförbättringar för flera organisationer men dessa metoder är fortfarande undervärderade och utnyttjas ej till fullo inom program och projekt för kvalitetsförbättringar. Därför är det av intresse att undersöka hur dessa metoder kan användas för kvalitetsförbättringar inom tillverkningsindustrin. Vid en av Teufelbergers produktionsanläggningar av stålvajrar i Wels, Österrike, har en fallstudie med kvalitetsförbättringsmetodiken DMAIC genomförts. Stålvajer typ BS 909 har studerats genom att använda den arsenal av verktyg och metoder som Six Sigma innefattar, med betoning på statistiska metoder och särskilt försöksplanering. Teufelberger hade för tillfället problem med främst diametern av stålvajern. Det har visat sig genom kundreklamationer och kvalitetskontroller i produktionen att variationen i en produktionsserie kan vara betydande. Dessutom finns det ej några dokumenterade optimala inställningar av processparametrar så varje maskinoperatör har sitt eget sätt att ställa in och justera processparametrarna. Detta är möjligt då det finns olika kombinationer av parameterinställningar som kan ge en produkt som är inom givna toleranser. Syftet med denna studie är att undersöka hur statistikverktyg kan användas för att minimera variansen i en tillverkningsprocess av stålvajer hos företaget Teufelberger, detta genom att utföra en fallstudie med kvalitetsförbättringsmetodiken DMAIC Experiment utfördes i följande fyra processer som producerar ingående komponenter som används vid tillverkningen av BS909: KL-A, KL-B, IL och Al. I processen för KL-A identifierades följande huvudeffekter som aktiva; Postformers-Spin och Postformers-Diameter. Den enda huvudeffekt som identifierades vara aktiv för KL-B var Postformers-Spin. För IL var följande huvudeffekter aktiva: Compacting device, Postformers-Spin och Postformers-Diameter. I processen AL var endast huvudeffekten Compacting device aktiv. Baserat på det resultat som framkom vid analysen av dessa experiment har nya teoretiskt optimala inställningar beräknats, som förväntas minska variationen i responsvariabeln diameter. De nya rekommenderade inställningarna bör tills vidare kunna fungera som ny standard för produktionen, men verifieringsförsök bör ändå utföras för att bekräfta och finjustera inställningarna.
Haase, Dirk. "Ein neues Verfahren zur modellbasierten Prozessoptimierung auf der Grundlage der statistischen Versuchsplanung am Beispiel eines Ottomotors mit elektromagnetischer Ventilsteuerung (EMVS)." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2005. http://nbn-resolving.de/urn:nbn:de:swb:14-1129553378853-30864.
Повний текст джерелаDer Ottomotor im Kraftfahrzeug hat in den letzten Jahren mit dem Einzug elektronischer Steuer- und Regelsysteme für Zündung, Einspritzung und Abgasnachbehandlung einen sehr hohen technischen Stand erreicht. Die wachsenden Ansprüche an die Motorenentwicklung im Hinblick auf Verbrauchsreduzierung bei gleichzeitiger Erfüllung der zukünftigen Abgasgrenzwerte, verschärfen den Druck zur Entwicklung weiterführender Technologien. Hierbei gibt es bereits einige vielversprechende Lösungsansätze, wie z.B. die Direkteinspritzung oder variable Ventilsteuerungen. All diese neuen Technologien zeichnen sich durch eine wachsende Komplexität durch die signifikant höhere Anzahl von Freiheitsgraden aus. Der damit verbundene Applikationsaufwand steigt drastisch durch die wachsende Anzahl freier Parameter, aber auch durch die steigenden Anforderungen an die Qualität der Applikationsergebnisse. Einen möglichen Lösungsansatz zur Realisierung der zukünftigen Anforderungen an den Entwicklungsprozess stellen die modellgestützte Parameteroptimierung sowie der Einsatz der "Statistischen Versuchsplanung" (SVP) - "Design of Experiments" (DoE) - dar. Der Grundgedanke basiert auf der Erstellung von Modellen zur Beschreibung der Abhängigkeiten variierter Verstellparameter. Mit diesen Modellen können Offline-Optimierungen unabhängig von Prüfstandsressourcen durchgeführt werden. Die für die Modellbildung benötigten Messdaten werden mit Hilfe der statistischen Versuchsplanung erzeugt. Dadurch wird der Prozess strukturiert und der Aufwand wird begrenzt. In der Arbeit wird der Einsatz der DoE-Methodik am Beispiel eines Ottomotors mit elektromechanischer Ventilsteuerung (EMVS) aufgezeigt
Jakob, Marius. "Methode zur Gestaltung anwendungsabhängiger Mitnehmerverbindungen: Leichtbau und Steigerung der Tragfähigkeit durch dünnwandige Profilwellen." Technische Universität Chemnitz, 2019. https://monarch.qucosa.de/id/qucosa%3A34105.
Повний текст джерелаScheffler, Liziane da Luz Seben. "Estudo exploratório de extração de celulose a partir de resíduos vegetais do processo produtivo de conserva de palmito (Archontophoenix alexandrae)." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/35616.
Повний текст джерелаAgribusiness and pulp production bring both relevant results to the Brazilian economy. In a sustainable perspective, the wastes of Industries that benefit vegetable materials may serve as pulp’s source, configuring itself as an attractive alternative for profit generation and reduction of negative environmental impacts. The aim in this dissertation is to carry out an exploratory study of pulp extraction from the waste of productive process of a firm which processes vegetal material, under the perspective of environmental and economic dimensions of sustainability. The study was unfolded in five steps: i) identification, in literature, the guidelines for sustainable productive processes, through approaches that embrace sustainability; ii) identification of industrial processes of pulp extraction and respective operational features; iii) definition of an industrial unit to perform the study, as well as the seasonality and the availability of vegetal wastes coming from the vegetable process; iv) adaptation of the industrial process of pulp extraction for using with vegetable wastes, and attendance to constraints of the current process in the industrial unit chosen for the study; and v) the performance of extraction tests using a project of experiments for further characterization of the cellulose pulp resulting from the waste. It was employed a Factorial composite second-order design in a Surface Response Methodology (SRM) in order to analyze the influence of the controlled variables over the response variables. Variables of the extraction process were defined according with the specific literature’s data, and response variables, adequate to the cellulose pulp characterization as Kappa Number, capability, absortion speed and apparent density were analyzed. Results indicate that constraints related to the high temperature used in the equipment available for extraction is a relevant factor in the process for obtaining higher contents of delignification. Studies show the influence of using additive process, anthraquinone, load time and alkaline pulping, as well as treatment of hydrolysis in the waste of pulp quality. The remarkable difference in the quality of vegetable waste after hydrolysis treatment indicates that a pretreatment stage of such waste is interesting, since the fiber is resistant and requires high alkali and addictive charges.
Fogliatto, Aloysio Arthur Becker. "Influência dos parâmetros do processo MIG/MAG com curto-circuito controlado sobre a geometria do cordão de solda." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/75921.
Повний текст джерелаThis work aims to study the influence of MAG welding process parameters with controlled short-circuit (CSC) metal transfer mode on weld bead geometry. The simple deposition weld tests were performed using a micro controlled power supply and an automatized device which enabled achievement of weld beads with standard conditions on API 5L X65 steel pipe whose inner diameter is 204 mm and thickness is 8 mm. The welding process parameters analyzed were the peak arcing current (Ia1), times (ta1) and (ta2), wire feed speed (W) and welding speed (v). Such parameters were set on Human-Machine Interface (HMI) of the micro controlled power supply and automatized welding device. The weld bead geometric features evaluated were width, reinforcement height and penetration depth. A Central Composite Face- Centred Design of Experiment was performed to obtain the relationship between the process parameters and the weld bead geometric features. Statistical analysis allowed development of mathematical models and they were found appropriate to determine the significance level of the process parameters – and their interactions – on output responses analyzed. Overlap and lack of fusion was detected on weld beads side in 60% of all specimens evaluated. The hypothesis formulated states that the origin of these discontinuities is from specific combination of parameters – high values of Ia1 and low values of ta1 together with usage of a shielding gas with high percentage of Ar – which would lead to lower fusion efficiency on weld bead side. The weld beads were produced with low spatter rates so it can be considered an improvement of the CSC process if compared with conventional short-circuit metal transfer mode. The peak arcing current Ia1 and time ta1 yielded similar effects on width and penetration depth, and it was valid when that parameters were taken both isolated and on interactions with other welding process parameters. The present study also revealed that Ia1 and ta1 are the most important parameters on influencing weld bead geometry, however, there is also strong dependence on a proper adjustment of wire feed speed W to obtain process stability.
Eghlio, Ramadan Mahmoud. "Laser net shape welding of steels." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/laser-net-shape-welding-of-steels(c5275bf1-ac62-4195-9d4e-61d1973d1b6f).html.
Повний текст джерелаBorunský, Tomáš. "Optimalizace procesu tlakového lití VN přístrojových transformátorů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228552.
Повний текст джерелаBATISTA, NETO Leopoldo Viana. "Otimização do processo de disposição de filmes TiN e TiZrN em aço inoxidável utilizando planejamento experimental fatorial." Universidade Federal de Campina Grande, 2014. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/378.
Повний текст джерелаMade available in DSpace on 2018-04-12T21:33:19Z (GMT). No. of bitstreams: 1 LEOPOLDO VIANA BATISTA NETO - DISSERTAÇÃO PPG-CEMat 2014..pdf: 2575700 bytes, checksum: a10f0685285492d2302637ed070d9631 (MD5) Previous issue date: 2014-08-28
Filmes finos de Nitreto de titânio (TiN) e Nitreto de titânio-zircônio (TiZrN) foram depositados sobre substratos de aço inoxidável 316 usando o método de Sputtering RF para deposição dos filmes. O planejamento de experimentos (DOE) tem sido reconhecido como um método poderoso para otimizar um processo complexo na indústria. Os efeitos do presente estudo foram verificar a viabilidade e confiabilidade da aplicação do método DOE em processos de Sputtering RF, otimizar os parâmetros de processamento para o processo de deposição, identificando os parâmetros sensíveis que afetam a espessura da camada depositada (E.C.D) e a resistência à corrosão (Ecorr.). Para o método de Sputtering RF, dois parâmetros, a taxa e tempo de deposição foram escolhidos para serem os parâmetros do processo. Depois da deposição, a estrutura de camada depositada foi caracterizada por Difração de Raios X (DRX) e por Microscopia Eletrônica de Varredura (MEV). Após o ensaio de polarização, a corrosão foi realizada a fim de investigar a relação entre o início da corrosão e a espessura da camada depositada. A análise de variância (ANOVA) foi realizada para avaliar os parâmetros sensíveis e prever as condições ideais. Com base na análise estatística, os parâmetros mais sensíveis no processo de Sputtering RF foram tanto a taxa como o tempo de deposição do filme fino. As melhores condições de deposição foram a taxa de deposição máxima e tempo máximo.
Titanium nitride (TiN) and titanium-zirconium nitride (TiZrN) thin films were deposited on ASTM F 138 stainless steel substrates using de Sputtering RF methods. Design of experiment (DOE) has long been recognized as a powerful method to optimize a complex process in industry. The purposes of present study were to verify the feasibility and reliability of the application of DOE method on de Sputtering RF processes and optimize the processing parameters for the deposition process, in which the sensitive parameters that affected the film properties were also identified. For de Sputtering RF method, two parameters, deposition rate and time were chosen to be the operating parameters. After deposition, the thin film structure was characterized by X-ray diffraction (XRD), and high-resolution scanning electron microscopy (SEM). After the polarization test, the corrosion analysis was carried out in order to investigate the relationship between the corrosion initiation and the thickness of the deposited layer. The analysis of variance (ANOVA) was conducted to assess the sensitive parameters and predict the optimum conditions. Based on the statistical analysis, the most sensitive parameters in de Sputtering RF process were both the deposition rate and time. The optimum deposition conditions in each system were maximum deposition rate and time.
Haase, Dirk. "Ein neues Verfahren zur modellbasierten Prozessoptimierung auf der Grundlage der statistischen Versuchsplanung am Beispiel eines Ottomotors mit elektromagnetischer Ventilsteuerung (EMVS)." Doctoral thesis, Technische Universität Dresden, 2004. https://tud.qucosa.de/id/qucosa%3A24582.
Повний текст джерелаDer Ottomotor im Kraftfahrzeug hat in den letzten Jahren mit dem Einzug elektronischer Steuer- und Regelsysteme für Zündung, Einspritzung und Abgasnachbehandlung einen sehr hohen technischen Stand erreicht. Die wachsenden Ansprüche an die Motorenentwicklung im Hinblick auf Verbrauchsreduzierung bei gleichzeitiger Erfüllung der zukünftigen Abgasgrenzwerte, verschärfen den Druck zur Entwicklung weiterführender Technologien. Hierbei gibt es bereits einige vielversprechende Lösungsansätze, wie z.B. die Direkteinspritzung oder variable Ventilsteuerungen. All diese neuen Technologien zeichnen sich durch eine wachsende Komplexität durch die signifikant höhere Anzahl von Freiheitsgraden aus. Der damit verbundene Applikationsaufwand steigt drastisch durch die wachsende Anzahl freier Parameter, aber auch durch die steigenden Anforderungen an die Qualität der Applikationsergebnisse. Einen möglichen Lösungsansatz zur Realisierung der zukünftigen Anforderungen an den Entwicklungsprozess stellen die modellgestützte Parameteroptimierung sowie der Einsatz der "Statistischen Versuchsplanung" (SVP) - "Design of Experiments" (DoE) - dar. Der Grundgedanke basiert auf der Erstellung von Modellen zur Beschreibung der Abhängigkeiten variierter Verstellparameter. Mit diesen Modellen können Offline-Optimierungen unabhängig von Prüfstandsressourcen durchgeführt werden. Die für die Modellbildung benötigten Messdaten werden mit Hilfe der statistischen Versuchsplanung erzeugt. Dadurch wird der Prozess strukturiert und der Aufwand wird begrenzt. In der Arbeit wird der Einsatz der DoE-Methodik am Beispiel eines Ottomotors mit elektromechanischer Ventilsteuerung (EMVS) aufgezeigt.
Bredda, Eduardo Henrique. "Estudo comparativo e otimização da quantidade de ômega 3 e ômega 6 produzido pelas microalgas nannochloropsis gaditana e dunaliella salina /." Guaratinguetá, 2019. http://hdl.handle.net/11449/183502.
Повний текст джерелаResumo: O cultivo de microalgas tem sido considerado como uma fonte promissora de lipídeos para a obtenção de ácidos graxos de alto valor agregado, como é o caso dos ômegas 3 (ω3) e ômegas 6 (ω6). O uso do planejamento de experimentos (DOE) permite estabelecer condições apropriadas de cultivo para as microalgas que favorece o acúmulo desses ácidos graxos. Desta forma, o presente trabalho teve como objetivo melhorar o desempenho dos cultivos das microalgas Nannochloropsis gaditana e Dunaliella salina, visando a produção de ω3 e ω6. Primeiramente, foram avaliadas, com o uso de uma matriz ortogonal Taguchi L4, as influências das concentrações de nitrato de sódio (de 25 a 75 mg L-1), de acetato de sódio e bicarbonato de sódio (ambas de 0 a 2 g L-1), sobre a produtividade de biomassa (Pb) e de lipídeos (Po). Como resultado, foi notado que tanto o acetato quanto o nitrato, influenciaram positivamente na Pb e na Po, para ambas as microalgas estudadas. O bicarbonato, por outro lado, não melhorou a Po, sendo excluído das etapas posteriores. Na etapa seguinte do trabalho foi realizado um planejamento fatorial completo 22 com ponto central, focando no estudo da concentração de nitrato (75 a 225 mg L-1) e acetato (2 a 6 gL-1) sobre a produtividade dos cultivos. As maiores Pb obtidas foram: 188,93 mg L-1 dia-1 para a microalga N. gaditana (225 mg L-1 de nitrato e 6 g L-1 de acetato) e 118,93 mg L-1 dia-1 para a D. salina (150 mg L-1 de nitrato e 4 g L-1 de acetato). Nestas condições de cultivo, a... (Resumo completo, clicar acesso eletrônico abaixo)
Doutor
Knob, Jan. "Pěnění fermentačních zbytků při vakuovém odpařování." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378403.
Повний текст джерелаHizli, Cem. "Thermal Optimization of Veo+ Projectors (thesis work at Optea AB) : Trying to reduce noise of the Veo+ projector by DOE (Design of Experiment) tests to find anoptimal solution for the fan algorithm while considering the thermal specifics of the unit." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-10382.
Повний текст джерелаPark, Jangho. "Efficient Global Optimization of Multidisciplinary System using Variable Fidelity Analysis and Dynamic Sampling Method." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/91911.
Повний текст джерелаDoctor of Philosophy
In recent years, as the cost of aircraft design is growing rapidly, and aviation industry is interested in saving time and cost for the design, an accurate design result during the early design stages is particularly important to reduce overall life cycle cost. The purpose of the work to reducing the design cost at the early design stage with design accuracy as high as that of the detailed design. The method of an efficient global optimization (EGO) with variable-fidelity analysis and multidisciplinary design is proposed. Using the variable-fidelity analysis for the function evaluation, high fidelity function evaluations can be replaced by low-fidelity analyses of equivalent accuracy, which leads to considerable cost reduction. As the aircraft system has sub-disciplines coupled by multiple physics, including aerodynamics, structures, and thermodynamics, the accuracy of an individual discipline affects that of all others, and thus the design accuracy during in the early design states. Four distinctive design methods are developed and implemented into the standard Efficient Global Optimization (EGO) framework: 1) the variable-fidelity analysis based on error approximation and calibration of low-fidelity samples, 2) dynamic sampling criteria for both filtering and infilling samples, 3) a dynamic fidelity indicator (DFI) for the selection of analysis fidelity for infilled samples, and 4) Multi-response Kriging model with an iterative Maximum Likelihood estimation (iMLE). The methods are validated with analytic functions, and the improvement in cost efficiency through the overall design process is observed, while maintaining the design accuracy, by a comparison with existing design methods. For the practical applications, the methods are applied to the design optimization of airfoil and complete aircraft configuration, respectively. The design results are compared with those by existing methods, and it is found the method results design results of accuracies equivalent to or higher than high-fidelity analysis-alone design at cost reduced by orders of magnitude.
Santos, Sousa Mayko Rannany. "Optimization of Operation Parameters in Ultrafiltration by Experiment Design, Mathematical Modelling and Fouling Characterization of the Membranes Used to Remove Dissolved and Colloidal Substances from a Treated Paper Mill Effluent." Doctoral thesis, Universitat Politècnica de València, 2020. http://hdl.handle.net/10251/155975.
Повний текст джерела[CA] En la present Tesi Doctoral es va investigar l'aplicació del procés d'ultrafiltració (UF) i el fenomen d'embrutiment de les membranes en l'eliminació de substàncies dissoltes i col·loïdals (DCS) d'efluents tractats de la indústria paperera (PMTE) per al seu reutilització en els diferents processos de fabricació de paper i cartó reciclatge. L'objectiu general d'aquesta investigació es va dividir en tres parts principals: i) descriu com trobar les condicions òptimes d'operació de quatre paràmetres de procés: pressió transmembrana (TMP), velocitat de flux creuat (CFV), temperatura i tall de pes molecular (MWCO) per a maximitzar el flux mitjà de permeat (Jp) i rebuig de la demanda química d'oxigen (COD) i minimitzar el descens del flux de permeado acumulat (SFD) utilitzant el mètode de Taguchi (Design Robust) i utility concept aplicat a un procés de UF a flux creuat en escala pilot, per a remoure DCS d'efluents tractats de la indústria paperera (PMTE), ii) el descens del flux de permeat i els mecanismes de embrutiment (fouling) de les membranes de UF embrutades amb PMTE es van examinar mitjançant models matemàtics semi-empírics. Els resultats per als diferents assajos de UF es van expressar en termes de variació del flux de permeat (Jp) en funció del temps per a verificar la precisió de l'ajust (major valor de R2 i menor valor de desviació estàndard) dels diferents models de Hermia adaptats a flux tangencial i del model de formació de coca en filtració a pressió constant ajustats a les dades experimentals, i iii) descriu mètodes d'identificació, caracterització i possibles orígens de les substàncies contaminants (foulants) en les membranes de UF. Tècniques com l'anàlisi física-química, FESEM, SEM-EDS, ATR-FTIR i 3DEEM es van dur a terme per a comprendre quina fracció dels contaminants són responsables per la formació d'incrustacions sobre la superfície i adsorció dins dels porus de les membranes. Els resultats obtinguts durant l'etapa d'optimització de paràmetres del processos van demostrar que TMP i MWCO tenen la major contribució en el Jp i SFD. En el cas de la taxa de rebuig de COD, els resultats van mostrar que MWCO té la major contribució seguida de CFV. Per consegüent, les condicions òptimes es van trobar per al segon nivell de TMP (2.0 bar), el tercer nivell del CFV (1.041 m/s), el segon nivell de la temperatura (15°C) i el tercer nivell de MWCO (100 kDa). Sota aquestes condicions òptimes d'operació Jp, rebuig de COD i SFD van aconseguir respostes de 81.15 L/m².h, 43.90% i 6.01 (al voltant de 28.96% per a (FD)), respectivament, valors dins del rang previst de l'interval de confiança del 95%. A més, els models de Hermia adaptats a UF en flux tangencial van ser capaços de predir amb gran precisió el descens del Jp i els mecanismes de embrutiment en funció del temps per a totes les membranes seleccionades (10, 30 i 100 kDa) i baix diferents condicions assajades de UF. Per tant, els models que presenten un major grau d'ajust són el bloqueig complet de porus (coeficient de determinació R2 >0.97) i bloqueig intermedi (R2 >0.96), seguit pel model de formació de coca (R2 >0.94), la qual cosa indica que estigues són els principals mecanismes de embrutiment de les membranes. Anàlisi de 3DEEM van revelar que la majoria de la matèria orgànica fluorescents en les membranes brutes eren proteïnes col·loidals (components similars a proteïnes I + II) i proteïnes macromoleculars (components similars a SMP). A més, polisacàrids (espècie cel·lulòsica) i substàncies com a àcids grassos i resinosos van ser identificades en les membranes contaminades mitjançant anàlisis ATR-FTIR, tals substàncies exerceixen un paper important en el embrutiment de les membranes. Per fi, anàlisi SEM-EDS per a les membranes embrutades amb PMTE es va detectar concentració de contaminants inorgànics (ions metàl·lics multivalents) especialment el Ca2+ que podria accelerar la formació coca en la àrea de la membrana.
[EN] In this PhD Thesis, the application of ultrafiltration process (UF) and membrane fouling phenomenon used to remove dissolved and colloidal substances (DCS) from paper mill treated effluent (PMTE) for reuse in different recycled paper and cardboard manufacturing processes was investigated. The overall goal of this research has been divided into three main parts: i) describes how to find optimal operating conditions of four controlling parameters, such as transmembrane pressure (TMP), cross-flow velocity (CFV), temperature and molecular weight cut-off (MWCO) for maximizing the average permeate flux (Jp) and chemical oxygen demand (COD) rejection, and minimizing the cumulative flux decline (SFD) using Taguchi method and utility concept for a cross-flow UF in pilot scale, used to remove DCS from a paper mill treated effluent (PMTE), ii) flux decline and fouling mechanisms of UF membranes fouled with PMTE were examined by theoretical modelling. The results from UF tests were expressed in terms of permeate flux (Jp) as a function of time to check modified Hermia's models adapted to crossflow filtration and cake formation in constant-pressure filtration, and iii) describes the Identification, characterization and possible origins of UF membrane foulants. Techniques such as chemical analysis, FESEM, SEM-EDS, ATR-FTIR and 3DEEM analysis were applied to understand which fraction of the foulants caused the fouling. This research found that the TMP and MWCO have the greatest contribution to the average permeate flux and SFD. In the case of the COD rejection rate, the results showed that MWCO has the highest contribution followed by CFV. The optimum conditions were found to be the second level of TMP (2.0 bar), the third level of the CFV (1.041 m/s), the second level of the temperature (15°C), and the third level of MWCO (100 kDa). Under these optimum conditions Jp, COD rejection and SFD resistance of 81.15 L/m2/h, 43.90% and 6.01 (around 28.96 % of (FD), respectively, were obtained and they were within of the predicted range at the 95% confidence interval. Furthermore, the results showed that the predictions of the modified Hermia's models adapted to cross-flow UF had good agreements with experimental data, under different conditions tested for PMTE. Therefore, it can be concluded that for all cases the best fit (higher accuracy) to the experimental data corresponds to the complete (coefficient of determination R2 >0.97) and intermediate (R2 >0.96) blocking, followed by the cake layer formation (R2 >0.94). Moreover, measurements of particle size distribution and zeta potential near the isoelectric point, showed a substantial reduction in colloidal compounds. The 3DEEM analysis revealed that the majority of the organic foulants with fluorescence characteristics on the fouled membranes were colloidal proteins (protein-like substances I+II) and macromolecular proteins (SMP-like substances). Further, polysaccharide (cellulosic specie), fatty and resin acid substances were identified on the fouled membrane by the ATR-FTIR analysis and they play an important role in membrane fouling. In addition, the membrane SEM-EDS analysis showed accumulate and adsorbed onto the membrane surfaces of inorganic foulants, such as multivalent metal ions and especially Ca2+ (acts as a binding agent) that could accelerate cake layer formation on the membrane.
Santos Sousa, MR. (2020). Optimization of Operation Parameters in Ultrafiltration by Experiment Design, Mathematical Modelling and Fouling Characterization of the Membranes Used to Remove Dissolved and Colloidal Substances from a Treated Paper Mill Effluent [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/155975
TESIS
Fukuda, Isa Martins. "Desenvolvimento e otimização de protetores solares empregando os conceitos de qualidade por design (QbD) e tecnologia analítica de processos (PAT)." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/9/9139/tde-12112018-145821/.
Повний текст джерелаThe sunscreens are great responsible for the skin protection when it is exposed to direct sunlight, so it means a great importance of health to optimize the development of type II cosmetic and monitor for it to be effective in its purpose. The objective of this work is to apply the concepts of Quality by Design and statistical tools of experimental design (DoE - Design of experiments), as well as applying the process analytical technology (PAT - Process Analytical Technology) concept for formulation and manufacturing process development of a topical sunscreen being able to modernize the cosmetic industry processing, including real time analyses and eliminating quarantine step, which waits analysis approval performed by the quality assurance, and then release the product for sale. As it is a systematic development, where critical quality attributes and risk assessment were performed to evaluate over obtained data. During experimental phase, the factorial design was used as a statistical tool for design of experiments implementation, and the responses were analyzed by response surface methodology (RSM - Response Surface Methodology). This mapping is critical to determination of the product design (design space), i.e. get sunscreen with the best physical and chemical characteristics and processing within the outlined scope. For in line methodology development, UV spectrometry was opted to be used due to less effort in sample preparation and due to great easiness to turn it into a PAT tool. For this, chemometrics was used, which brings together chemical and statistical elements to obtain three main elements: empirical modeling, multivariate modeling and chemical data, making it able to model systems that are unknown and complex, as a sunscreen, getting direct answers as product release approval before being packed, for example. The presented approach was based on the construction of quality throughout the sunscreen development and optimization making possible the real time quality monitoring.
Menarini, Lorenzo. "The design of the experiment applied to ceramic tile technology: from the optimization of the mixture composition to the evaluation of the process parameters." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.
Знайти повний текст джерелаYurtseven, Saygin. "Analysis Of The Influence Of Non-machining Process Parameters On Product Quality By Experimental Design And Statistical Analysis." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1026863/index.pdf.
Повний текст джерелаdishwasher production in Arcelik Dishwasher plant is examined. Sheet metal forming processes of dishwasher production constitutes the greatest portion of production cost and using the Pareto analysis technique
four pieces among twenty six pieces are determined to be investigated. These four pieces are the U Sheet, L Sheet, Inner Door and Side Panel of the dishwasher. By the help of the flow diagrams production process of the determined pieces are defined. Brainstorming technique and cause&
effect diagrams are used to determine which non-machining process parameters can cause pieces to be scrapped. These parameters are used as control factors in experimental design. Taguchi&
#8217
s L16(215) orthogonal array, Taguchi&
#8217
s L16(215) orthogonal array using S/N transformation and 28-4 fractional factorial design are used on purpose. With repetitions and confirmation experiments the effective parameters are determined and optimum level of these parameters are defined for the improvements on scrap quantity and quality of production.
Olsen, Rebecca Elizabeth. "Synthesis, Characterization, and Application of High Surface Area, Mesoporous, Stabilized Anatase TiO2 Catalyst Supports." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3884.
Повний текст джерелаAndersson, David. "Multivariate design of molecular docking experiments : An investigation of protein-ligand interactions." Doctoral thesis, Umeå universitet, Kemiska institutionen, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-35736.
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