Rozprawy doktorskie na temat „Machines”
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Tebbifakhr, Amirhossein. "Machine Translation For Machines". Doctoral thesis, Università degli studi di Trento, 2021. http://hdl.handle.net/11572/320504.
Pełny tekst źródłaDinakar, Karthik. "Lensing Machines : representing perspective in machine learning". Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/112523.
Pełny tekst źródłaCataloged from PDF version of thesis. Due to the condition of the original material with text runs off the edges of the pages, the reproduction may have unavoidable flaws.
Includes bibliographical references (pages 167-172).
Generative models are venerated as full probabilistic models that randomly generate observable data given a set of latent variables that cannot be directly observed. They can be used to simulate values for variables in the model, allowing analysis by synthesis or model criticism, towards an iterative cycle of model specification, estimation, and critique. However, many datasets represent a combination of several viewpoints - different ways of looking at the same data that leads to various generalizations. For example, a corpus that has data generated by multiple people may be mixtures of several perspectives and can be viewed with different opinions by others. It isn't always possible to represent the viewpoints by clean separation, in advance, of examples representing each perspective and train a separate model for each point of view. In this thesis, we introduce lensing, a mixed-initiative technique to (i) extract lenses or mappings between machine-learned representations and perspectives of human experts, and (2) generate lensed models that afford multiple perspectives of the same dataset. We explore lensing of latent variable model in their configuration, parameter and evidential spaces. We apply lensing to three health applications, namely imbuing the perspectives of experts into latent variable models that analyze adolescent distress and crisis counseling.
by Karthik Dinakar.
Ph. D.
Le, Flohic Julien. "Vers une commande basée modèle des machines complexes : application aux machines-outils et machines d'essais mécaniques". Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22551/document.
Pełny tekst źródłaNowadays, the requirements in productivity and costs mastering have forced the industrial manufacturers to develop new kind of mechanisms. Thus, the complexity of the machine-tools structures and machining processes has increased and new challenges have emerged : flexible structure, vibration, non-negligible dynamic effects, etc ... However, their implementation still comes from methods used for conventional machines. These works are thus about defining overall strategies including consideration of the kind of structure used and the task to realise. Two illustrative contexts are used. In the context of machining, we propose a generic tuning method based on kinematic and dynamic model of machine-tools structure that requires only a few manual modifications, in order to save time for implementation. A new computed torque control law is proposed, it reduces vibration phenomena in dynamical demanding phases. In the context of the mechanical tests, the objective is to demonstrate the feasibility of using parallel machines with 6 degrees of freedom in the context of mechanical tests, whereas the boundary conditions are perfectly controlled. We propose an instrumentation and control scheme that is able to perform mechanical tests with a maximum error of about 0.40 mu m, even in the case of very rigid specimen (concrete for example)
Bromberg, Paul. "Clockworks, hot pots, heat machines, and chemical machines : the contrivance aspect of the machine metaphor". Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/30405.
Pełny tekst źródłaGraduate and Postdoctoral Studies
Graduate
Lanarolle, W. D. Gamini. "Machine setting automation for circular weft-knitting machines". Thesis, University of Manchester, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488354.
Pełny tekst źródłaKent, W. F. "Machine learning for parameter identification of electric induction machines". Thesis, University of Liverpool, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399178.
Pełny tekst źródłaSokola, Matija. "Vector control of induction machines using improved machine models". Thesis, Liverpool John Moores University, 1998. http://researchonline.ljmu.ac.uk/4899/.
Pełny tekst źródłaPark, Yongwon Baskiyar Sanjeev. "Dynamic task scheduling onto heterogeneous machines using Support Vector Machine". Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SPRING/Computer_Science_and_Software_Engineering/Thesis/Park_Yong_50.pdf.
Pełny tekst źródłaThorén, Daniel. "Radar based tank level measurement using machine learning : Agricultural machines". Thesis, Linköpings universitet, Programvara och system, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-176259.
Pełny tekst źródłaRomano, Donato. "Machine Learning algorithms for predictive diagnostics applied to automatic machines". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22319/.
Pełny tekst źródłaSchneider, C. "Using unsupervised machine learning for fault identification in virtual machines". Thesis, University of St Andrews, 2015. http://hdl.handle.net/10023/7327.
Pełny tekst źródłaKöÅ, er Hür 1976. "Development of magnetic induction machines for micro turbo machinery". Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/8119.
Pełny tekst źródłaIncludes bibliographical references.
This thesis presents the nonlinear analysis, design, fabrication, and testing of an axial-gap magnetic induction micro machine, which is a two-phase planar motor in which the rotor is suspended above the stator via mechanical springs, or tethers. The micro motor is fabricated from thick layers of electroplated NiFe and copper, by our collaborators at Georgia Institute of Technology. The rotor and the stator cores are 4 mm in diameter each, and the entire motor is about 2 mm thick. During fabrication, SU-8 epoxy is used as a structural mold material for the electroplated cores. The tethers are designed to be compliant in the azimuthal direction, while preventing axial deflections and maintaining a constant air gap. This enables accurate measurements of deflections within the rotor plane via a computer microvision system. The small scale of the magnetic induction micro machine, in conjunction with the good thermal contact between its electroplated stator layers, ensures an isothermal device which can be cooled very effectively. Current densities over 109 A/m2 simultaneously through each phase is repeatedly achieved during experiments; this density is over two orders of magnitude larger than what can be achieved in conventional macro-scale machines. More than 5 Nm of torque is obtained for an air gap of about 5 zm, making this micro motor the highest torque density micro-scale magnetic machine to date. About 0.3 buNm for the large air gap of 70 m is also achieved in systematic tests that reveal the influence of strong eddy-currents and associated nonlinear saturation within the micro motor.
(cont.) Eddy-current effects are modeled using a finite-difference vector potential formulation. Its results demonstrate the presence of flux crowding on the stator surface, which leads to heavy saturation. To capture saturation effects, a fully nonlinear finite-difference time-domain simulation is developed to solve Maxwell's Equations within the computational space of the micro machine. To mitigate the inherent stiffness in the partial differential equations, the speed of light is artificially reduced by five orders of magnitude, taking special care that assumptions of magnetoquasistatic behavior are still met. The results from this model are in very good agreement with experimental data from the tethered magnetic induction micro motor.
by Hür KöÅer.
Ph.D.
Griffith, Saul Thomas 1974. "Growing machines". Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28780.
Pełny tekst źródłaIncludes bibliographical references.
construction is developed in three dimensions. It is similarly shown that right-angled tetrahedrons, when folded from an edge-connected string, can generate any three dimensional structure where the primitive pixel (or voxel) is a rhombic hexahedron. This construction also suggests a concept of 3D completeness for assembly, somewhat analogous to the concept of Turing completeness in computation. In combination, these pieces of work suggest that a manufacturing system based on four tiles, with seven states per tile, is capable of self-replication of arbitrary 3D structure by copying, then folding, bit strings of those tiles where the desired structure is encoded in the tile sequence.
Biological systems are replete with examples of high complexity structures that have "self assembled," or more accurately, programmatically assembled from many smaller, simpler components. By comparison, the fabrication systems engineered by humans are typically top down, or subtractive, processes where systems of limited complexity are carved from bulk materials. Self-assembly to date has resembled crystallization more than it has the programmatic assembly of complex or useful structures--these systems are information limited. This thesis explores the programming of self-assembling systems by the introduction of small amounts of state to the sub-units of the assembly. A six-state, kinematic, conformational latching component is presented that is capable of self-replicating bit strings of two shape differentiated versions of the same component where the two variants represent the 0 and 1 bits. Individual units do not assemble until a string is introduced to the assembly environment to be copied. Electro-mechanical state machine emulators were constructed. Operating on an air table, the units demonstrated logic limited aggregation, or error-preventing assembly, as well as autonomous self-replication of bit strings. A new construction was developed that demonstrates that any two dimensional shape composed of square pixels can be deterministically folded from a linear string of vertex-connected square tiles. This non-intersecting series of folds implies a 'resolution' limit of four tiles per pixel. It is shown that four types of tiles, patterned magnetically, is sufficient to construct any shape given sequential folding. The construction was implemented to fold the letters 'M I T' from sequences of the 4 tile types. An analogous
Saul Thomas Griffith.
Ph.D.
Jones, Leslie Braziel Raines Brian Edward. "Adding machines". Waco, Tex. : Baylor University, 2009. http://hdl.handle.net/2104/5311.
Pełny tekst źródłaAwad, Edmond. "Moral machines : perception of moral judgment made by machines". Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/112532.
Pełny tekst źródłaCataloged from PDF version of thesis.
Includes bibliographical references (pages 79-85).
While technological development of vehicular autonomy has been progressing rapidly, a parallel discussion has emerged with regard to the moral implications of a future wherein people hand over to autonomous machines the controls to a mode of transportation. These discussions have entered a new phase with the U.S. Department of Transportation (DoT) releasing a 15-point policy that requires manufacturers to explain how their AVs will handle "ethical considerations". However, there is a huge gap in our understanding of the ethical perception of Al, as there have been few large-scale empirical studies on human moral perception of outcomes to autonomous vehicle moral dilemmas. Additionally, public engagement is a very important piece of the puzzle, especially given the emotional salience of traffic accidents. With that in mind, I co-developed the "Moral Machine" (http://moralmachine.mit.edu). Moral Machine is a platform for gathering a human perspective on moral decisions made by machine intelligence, such as AVs. The web site went viral, and got covered in various media outlets. This web site has also been a valuable data collection tool, allowing us to collect the largest dataset on Al ethics ever collected in history (with 30 million decisions by over 3 million visitors, so far). This thesis will introduce the Moral Machine platform as a data-gathering platform. Moreover, insights about the human perception of the different routes to full automation will be covered in the thesis, with the data collected through other online platforms.
by Edmond Awad.
S.M.
Papakyriakopoulos, Orestis [Verfasser], Simon [Akademischer Betreuer] Hegelich, Jürgen [Gutachter] Pfeffer i Simon [Gutachter] Hegelich. "Political Machines: Machine learning for understanding the politics of social machines / Orestis Papakyriakopoulos ; Gutachter: Jürgen Pfeffer, Simon Hegelich ; Betreuer: Simon Hegelich". München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/121302627X/34.
Pełny tekst źródłaGOUVEA, RODRIGO MOSCONI DE. "SERVICES, PROCESSES AND MACHINES: A METHODOLOGIES STUDY FOR MACHINE REASSIGNMENT PROBLEM". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2018. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=34639@1.
Pełny tekst źródłaCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE EXCELENCIA ACADEMICA
A organização lógica de data centers recai principalmente na questão estratégica de distribuir os serviços nos equipamentos de forma que os custos operacionais sejam os menores possíveis. Além desses custos, devem ser considerados outros aspectos que envolvem a interdependência de seus serviços internos e a distribuição entre suas localidades, visando assim melhorar a qualidade de seu produto aos seus clientes. Este trabalho explora o problema de atribuição de processos a máquinas do desafio ROADEF de 2012 pelos métodos de programação inteira e geração de colunas. Apresenta estratégias para lidar com as dificuldades numéricas encontradas. Na geração de colunas, analisa técnicas para acelerar a convergência, por meio de resolver o mestre restrito após cada variável, geração prévia de colunas e estabilização das variávies duais. Ao final do trabalho, são comparados os resultados obtidos com os melhores resultados oficiais.
A data center logic organization lies mainly by the strategic decision on how distribute services between machines, so the operational costs should be the smallest as possible. Beside those costs, must also consider the interdependence of their own services, the distribution between their localities, to improve the quality of their product to their customers. This work explores the challenge ROADEF 2012 machine assignment problem by the means of integer programming and column generation. Shows strategies to address numeric issues. At column generation, it analyzes techniques to speed up the convergence, by solving after each variable adiction, a previous generation of columns and stabilization of duals variables. At the end of the work, it compares the results obtained are compared with the best official results.
Karlbom, Hannes. "Hybrid Machine Translation : Choosing the best translation with Support Vector Machines". Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-304257.
Pełny tekst źródłaPreux, Philippe. "Mad : une machine virtuelle vectorielle : conséquences sur l'architecture des machines vectorielles". Lille 1, 1991. http://www.theses.fr/1991LIL10030.
Pełny tekst źródłaRazet, Benoit. "Machines d'Eilenberg Effectives". Phd thesis, Université Paris-Diderot - Paris VII, 2009. http://tel.archives-ouvertes.fr/tel-00463049.
Pełny tekst źródłaSokolova, Marina L. "Decision list machines". Thesis, University of Ottawa (Canada), 2001. http://hdl.handle.net/10393/6380.
Pełny tekst źródłaNowostawski, Mariusz, i n/a. "Evolvable virtual machines". University of Otago. Department of Information Science, 2008. http://adt.otago.ac.nz./public/adt-NZDU20081204.145510.
Pełny tekst źródłaHarris, T. L. "Extensible virtual machines". Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.603746.
Pełny tekst źródłaFredriksson, Olle. "Distributing abstract machines". Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/6196/.
Pełny tekst źródłaKarkinsky, Damien A. "Mobile B machines". Thesis, University of Surrey, 2007. http://epubs.surrey.ac.uk/844588/.
Pełny tekst źródłaRazet, Benoît. "Machines d'Eilenberg effectives". Paris 7, 2009. http://www.theses.fr/2009PA077195.
Pełny tekst źródłaAutomata theory bas been developed to overcome both theoretical and practical problems. Nowadays, automata are considered as basic knowledge by all computer scientists, and they are used in most softwares. In 1974, Samuel Eilenberg gave a new machine model unifying the most common automata such as transducers, pushdown automata, and even Turing machines. Eilenberg machines also have an interesting modularity property that is useful for applications modeled using different levels of automata; as may appear in computational linguistics. We propose an effective design of Eilenberg machines and study simulation techniques. Our Simulator is defined by a functional program that progressively enumerates solutions, exploring a research space according to various of strategies. We introduce the notion of finite Eilenberg machines, and formally prove the correction of the underlying simulation engine. The control component of an Eilenberg machine is defïned by a non-deterministic automaton; in this context, regular expressions may be used as syntax describing the automaton. In recent years, the concept of Brzozowski's derivatives has led to many novel and efficient algorithms that compile regular expressions into non-deterministic automata. We review these state of the art algorithms, give an efficient OCaml implémentation, and compare their efficiency in a common framework
Andersen, Kristina. "Making Magic Machines". Doctoral thesis, KTH, Medieteknik och interaktionsdesign, MID, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214017.
Pełny tekst źródłaHur kan vi iscensätta upplevelser som tillåter oss att utforska och skapa idéer för det som vi ännu inte vet något om? Genom att engagera deltagare i korta, intensiva, workshop-liknande upplevelser har jag lyckats få dem att öppna sig, uttrycka personliga drivkrafter och önskemål, vilket i sin tur gör det möjligt för dem att skapa helt nya designkoncept. Mitt bidrag är en ny materiell praktik där skapande-processen görs öppen och därmed låter deltagarna fantisera fram helt nya möjliga saker. Praktiken är grundad i deltagarnas djupt kända personliga drivkrafter och önskemål, men vi ber dem uttrycka dem i prosaiska fysiska material - såsom godis eller kartong - där motsatsförhållandet mellan dessa båda leder till att olika synsätt kan komma till ytan och ställas mot varandra: det möjliga, det okända, det fruktade och det önskade. Praktiken öppnar för att ge ett brett spektrum av kunskap fysisk form - och då vi gör det på ett icke-normativt sätt, där vi undviker att begränsas av kommersiella eller tekniska förutsättningar, skapar vi en grund för att få fram idéer bortom de självklara - idéer som egentligen inte tillhör någon av oss och samtidigt alla. Formatet har utvecklats över en lång tidsrymd, från workshops där vi skapade prototyper i tekniska material, till den form de har idag som fokuserar på att uttrycka idéer om teknik snarare än i teknik.
QC 20170911
Vier, Riley Todd. "Machines of curation". Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/6322.
Pełny tekst źródłaERDMAN, Paolo Andrea. "Quantum Thermal Machines". Doctoral thesis, Scuola Normale Superiore, 2020. http://hdl.handle.net/11384/95512.
Pełny tekst źródłaFernandez, sanchez Alejandro. "Étude de machines électriques non conventionnelles pour des alternateurs industriels". Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLC084/document.
Pełny tekst źródłaThe PhD project aims to analyse nonconventional structures of electric machines for electric power generation with diesel gensets. The researched topologies should use less active materials and/or simplify the manufacturing process compared to today’s machines.One of the structures is intended for the excitation system of the electric machine. It is composed of a claw-pole stator and a toroidal winding. It is designed using a 3D Finite Element model, previously validated by a prototype. This structure allows a significant reduction of the quantity of copper of the field winding.The other two structures under study are proposed for the main generator. A synchronous-reluctance machine with flux-barriers and a field winding in the rotor is analysed. The objective is to increase the torque density by increasing the reluctance torque. The designed machine is compared to the conventional structure. This case shows the limitations of structures similar to the current structure.The last structure is a new topology of electric machine. It combines the characteristics of claw-pole machines andaxial-flux machines. An original modelling approach is developed to analyse this 3D structure for its design based on an optimization algorithm. The study shows that the excitation system has a key role in its performances.This work also notes that the future evolution of magnetic materials should benefit the use of non-conventional structures with 3D flux paths
Aigbomian, Anthony Omonzejele. "Traction machines for automotive applications : efficiency maps for permanent magnet machines". Thesis, University of Nottingham, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.739378.
Pełny tekst źródłaO'Hara, Daniel Finbarr John. "Machine fictions : a genealogy of machines in twentieth-century prose and art". Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432166.
Pełny tekst źródłaWesterberg, Simon. "Semi-Automating Forestry Machines : Motion Planning, System Integration, and Human-Machine Interaction". Doctoral thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-89067.
Pełny tekst źródłaBrus, Alexander. "Validation of energy efficiency requirements for machine tools and industrial washing machines". Thesis, KTH, Energiteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-256062.
Pełny tekst źródłaProduktionsutrustning står för en stor andel av energianvändningen inom industrin. Men än så länge finns det inget standardiserat sätt att kravställa energieffektivitet vid inköp av nya maskiner. Scania har därför börjat implementera krav på energieffektivitet i deras inköpsprocess för produktionsutrustning. Som en del av detta behövs ett sätt att validera att de ställda kraven också uppfylls. Denna studie undersöker hur krav på energieffektivitet kan valideras på ett användarvänligt och tidseffektivt sätt. Först kartläggs de energieffektivitetskrav som ställs av Scania och lagstiftning. Dessa krav definieras sedan så tydligt som möjligt för att möjliggöra en validering. Två mätningar av energianvändning på komponentnivå på en bearbetningsmaskin och en industriell tvättmaskin analyseras. Sedan utförs en kostnadsanalys för att avgöra ett tidsspann som kan sägas vara tidseffektivt för en valideringsprocess. Resultaten från detta används sedan för att utveckla en valideringsmetod och ett interaktivt protokoll. Denna metoden testas sedan genom en simulerad validering. Den föreslagna metoden består av två delar, en inspektion och en mätning. Inspektionen är endast visuell och validerar kraven på effektivitetsklass på motorer och pumpar, samt krav på specifik utrustning. Mätningen utförs genom att köra maskinen genom fyra olika maskinlägen i åtta steg och validerar krav på när energi används, och hur mycket som används. Den föreslagna metoden validerar alla krav på energieffektivitet som Scania ställer på bearbetningsmaskiner och industriella tvättmaskiner. Den kan utföras under ett tidsspann som är mycket kortare än gränsen för vad som är kostnadseffektivt. Den föreslagna metoden kan validera krav på energianvändning från elektriska komponenter, tryckluftsanvändning, och visuellt bekräfta att kravställd utrustning är på plats och vissa egenskaper baserat på märkningen. Metoden kommer också att kunna validera alla nya krav på energianvändning från elektriska komponenter, vilket innebär att den enkelt kan appliceras på andra typer av produktionsutrustning.
Farhan, Uday Hameed. "An integrated system to design machine layouts for modular special purpose machines". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2018. https://ro.ecu.edu.au/theses/2081.
Pełny tekst źródłaSOAVE, Elia. "Diagnostics and prognostics of rotating machines through cyclostationary methods and machine learning". Doctoral thesis, Università degli studi di Ferrara, 2022. http://hdl.handle.net/11392/2490999.
Pełny tekst źródłaNegli ultimi decenni, l’analisi vibrazionale è stata sfruttata per il monitoraggio di molti sistemi meccanici per applicazioni industriali. Nonostante molte pubblicazioni abbiano dimostrato come la diagnostica vibrazionale possa raggiungere risultati soddisfacenti, lo scenario industriale odierno è in profondo cambiamento, guidato dalla necessità di ridurre tempi e costi produttivi. In questa direzione, la ricerca deve concentrarsi sul miglioramento dell’efficienza computazionale delle tecniche di analisi del segnale applicate a fini diagnostici. Allo stesso modo, il mondo industriale richiede una sempre maggior attenzione per la manutenzione predittiva, al fine di stimare l’effettivo danneggiamento del sistema evitando così inutili fermi macchina per operazioni manutentive. In tale ambito, negli ultimi anni l’attività di ricerca si sta spostando verso lo sviluppo di modelli prognostici finalizzati alla stima della vita utile residua dei componenti. Tuttavia, è importante ricordare come i due ambiti siano strettamente connessi, essendo la diagnostica la base su cui fondare l’efficacia di ciascun modello prognostico. Su questa base, questa tesi è stata incentrata su queste due diverse, ma tra loro connesse, aree al fine di identificare e predire possibile cause di cedimento su macchine rotanti per applicazioni industriali. La prima parte della tesi è concentrata sullo sviluppo di un nuovo indicatore di blind deconvolution per l’identificazione di difetti su organi rotanti sulla base della teoria ciclostazionaria. Il criterio presentato vuole andare a ridurre il costo computazionale richiesto dalla blind deconvolution tramite l’utilizzo della serie di Fourier-Bessel grazie alla sua natura modulata, maggiormente affine alla tipica firma vibratoria del difetto. L’indicatore proposto viene accuratamente confrontato con il suo analogo basato sulla classica serie di Fourier considerando sia segnali simulati che segnali di vibrazione reali. Il confronto vuole dimostrare il miglioramento fornito dal nuovo criterio in termini sia di minor numero di operazioni richieste dall’algoritmo che di efficacia diagnostica anche in condizioni di segnale molto rumoroso. Il contributo innovativo di questa parte riguarda la combinazione di ciclostazionarietà e serie di Furier-Bessel che porta alla definizione di un nuovo criterio di blind deconvolution in grado di mantenere l’efficacia diagnostica della ciclostazionarietà ma con un minor tempo computazionale per venire incontro alle richieste del mondo industriale. La second parte riguarda la definizione di un nuovo modello prognostico, appartenente alla famiglia degli hidden Markov models, costruito partendo da una distribuzione Gaussiana generalizzata. L’obbiettivo del metodo proposto è una miglior riproduzione della reale distribuzione dei dati, in particolar modo negli ultimi stadi del danneggiamento. Infatti, la comparsa e l’evoluzione del difetto comporta una modifica della distribuzione delle osservazioni fra i diversi stati. Di conseguenza, una densità di probabilità generalizzata permette la modificazione della forma della distribuzione tramite diversi valori dei parametri del modello. Il metodo proposto viene confrontato con il classico hidden Markov model di base Gaussiana in termini di qualità di riproduzione della distribuzione e predizione della sequenza di stati tramite l’analisi di alcuni test di rottura su cuscinetti volventi e sistemi complessi. L’innovatività di questa parte è data dalla definizione di un algoritmo iterativo per la stima dei parametri del modello nell’ipotesi di distribuzione Gaussiana generalizzata, sia nel caso monovariato che multivariato, partendo dalle osservazioni sul sistema fisico in esame.
Monaco, Beatrice. "Machinic modernism: the Deleuzian literary machines of Woolf, Lawrence and Joyce". Thesis, Birkbeck (University of London), 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.491002.
Pełny tekst źródłaRoderus, Jens, Simon Larson i Eric Pihl. "Hadoop scalability evaluation for machine learning algorithms on physical machines : Parallel machine learning on computing clusters". Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-20102.
Pełny tekst źródłaHerman, Paul Andrew. "Improvement of surface finish quality in peripheral milling VIA precision compensation for cutter runout". Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/16696.
Pełny tekst źródłaDavis, Tyler A. "Flexible machine tool control for direct, in-process dimensional part inspection /". Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd478.pdf.
Pełny tekst źródłaMelo, Brandao De Raissa. "Surveillance de l’apparition de fissures sur des composants structuraux de machines". Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI073.
Pełny tekst źródłaThe principle of the conditional maintenance consists in continuously evaluating the health state of industrial machines, from measurements and appropriate signal processing, in order to carry out maintenance operations only at the most convenient time. In this context, the objective of this PhD thesis is to implement a technique for detecting as soon as possible slow damage initiation in vibrating structures, such as the fatigue cracks, to avoid the unexpected failure of machines. We have conducted empirical investigations with two experimental setups built in the laboratory. The study started with a cantilever beam subjected to dynamic bending loads, and continued on a test-bench more representative of the industrial problem. In both cases, the structure was naturally and progressively damaged, from a state considered to be healthy, until the crack occurs. Its dynamical behavior was monitored using accelerometers. Therefore, in order to identify damage-sensitive features, many leads were investigated. We have examined the features describing the measured signals waveform, which are statistical moments, mean frequencies and median frequencies. They are successfully used for fault detection on rotating machinery, but they did not demonstrate enough sensitiveness to detect structural damage. The natural frequencies automatically identified from the measured time signals under operational loads have also been studied. Thus, we oriented our work towards a more global approach to monitor the spectral changes caused by the appearance of damage on a structure. Based on the spectral matrices and transmissibility quantities, multi-sensor indicators were developed and tested for the two cases of study. A Principal Component Analysis allowed us to identify, between the surveyed features, the ones most relevant for monitoring the integrity of structures
Mahfoud, Jarir. "Recherches en Dynamique pour un Développement d'Eco Machines Tournantes Réactives - Smart Machines". Habilitation à diriger des recherches, INSA de Lyon, 2009. http://tel.archives-ouvertes.fr/tel-00545388.
Pełny tekst źródłaAmara, Yacine. "Modélisation pour le dimensionnement des machines électriques. Application à des machines spéciales". Habilitation à diriger des recherches, Université du Havre, 2012. http://tel.archives-ouvertes.fr/tel-00831948.
Pełny tekst źródłaTait, Jack. "Programmable analogue drawing machines : Machines and timers designed to make art works". Thesis, Manchester Metropolitan University, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.534242.
Pełny tekst źródłaJain, Brijnesh Johannes. "Structural neural learning machines". [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=98007911X.
Pełny tekst źródłaNanchen, Stanislas. "Verifying abstract state machines /". Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17489.
Pełny tekst źródłaZhang, Gefei. "Aspect-Oriented State Machines". Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-128399.
Pełny tekst źródłaHillbrecht, Ricardo. "A Virtual-Machines-MIB". reponame:Repositório Institucional da UFPR, 2013. http://hdl.handle.net/1884/29370.
Pełny tekst źródłaJin, Bo. "Evolutionary Granular Kernel Machines". Digital Archive @ GSU, 2007. http://digitalarchive.gsu.edu/cs_diss/15.
Pełny tekst źródłaSchmolck, Alexander. "Smooth relevance vector machines". Thesis, University of Exeter, 2008. http://hdl.handle.net/10036/40793.
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