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Dissertations / Theses on the topic 'Reliability calibrations'

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1

Liu, Haoyu. "System reliability calibrations for the Direct Design Method of planar steel frames with partially restrained connections." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/20858.

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The system-based design approach for steel structures using advanced structural analysis, referred to as the Direct Design Method (DDM), has gained much research interest from the scientific community, and has been permitted in a number of steel structural specifications such as American specification AISC360 and Australian standard AS4100. Unfortunately, even the most sophisticated nonlinear analysis method cannot predict the actual performance of a structure with certainty due to ever-present uncertainties in the demands imposed to the structure and structural resistance. To fulfill the goal
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2

Albright, Jon D. "Reliability enhancement of the Navy metrology and calibration program." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA341394.

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Thesis (M.S. in Management) Naval Postgraduate School, December 1997.<br>"December 1997." Thesis advisor(s): Donald Eaton, Keebom Kang. Includes bibliographical references (p. 83-84). Also available online.
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3

Gong, Zitong. "Calibration of expensive computer models using engineering reliability methods." Thesis, University of Liverpool, 2018. http://livrepository.liverpool.ac.uk/3028587/.

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The prediction ability of complex computer models (also known as simulators) relies on how well they are calibrated to experimental data. History Matching (HM) is a form of model calibration for computationally expensive models. HM sequentially cuts down the input space to find the fitting input domain that provides a reasonable match between model output and experimental data. A considerable number of simulator runs are required for typical model calibration. Hence, HM involves Bayesian emulation to reduce the cost of running the original model. Despite this, the generation of samples from th
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4

Garbuno, Inigo A. "Stochastic methods for emulation, calibration and reliability analysis of engineering models." Thesis, University of Liverpool, 2018. http://livrepository.liverpool.ac.uk/3026757/.

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This dissertation examines the use of non-parametric Bayesian methods and advanced Monte Carlo algorithms for the emulation and reliability analysis of complex engineering computations. Firstly, the problem lies in the reduction of the computational cost of such models and the generation of posterior samples for the Gaussian Process' (GP) hyperparameters. In a GP, as the flexibility of the mechanism to induce correlations among training points increases, the number of hyperparameters increases as well. This leads to multimodal posterior distributions. Typical variants of MCMC samplers are not
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Lidgren, Albin. "Concept Study and Design of a New Torque Calibration Rig." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65712.

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When buying a new car today, the customer often expects to get a vehiclewith high quality. Each vehicle or engine should therefore be checked toassure quality. The same goes for clutches and couplings. A powerful enginebecomes useless when a clutch slips. Reliable torque measurement istherefore essential to the automotive industry. The herewith Bachelor thesisproposes a new torque calibration rig for online torque measurement in couplingapplications.The concept encompasses a servo motor with its associated electronics, agearbox to create the high torques (3 kNm), a reference torque transducer,
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6

Reynolds, James Bernard. "Advanced analysis and reliability-based design of steel scaffolding systems." Thesis, The University of Sydney, 2014. http://hdl.handle.net/2123/11626.

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This thesis presents a comprehensive investigation of the advanced analysis, reliability-based design and optimisation of steel support scaffolding systems. Support scaffolding systems are used to provide temporary support to timber formwork systems, reinforcement, concrete, workmen and equipment, during the construction of permanent structures such as buildings and bridges. Stick-type steel scaffolds with cuplok joints are the focus of the thesis. This thesis includes the collection and statistical analysis of shore load effects occurring as a result of construction dead and live loads. A com
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7

GINO, DIEGO. "ADVANCES IN RELIABILITY METHODS FOR REINFORCED CONCRETE STRUCTURES." Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2754713.

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8

Zaghloul, Hassan. "Calibration of deterministic parameters for reassessment of offshore platforms in the Arabian Gulf using reliability-based method." University of Western Australia. School of Mechanical Engineering, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0155.

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[Truncated abstract] The Arabian Gulf oil and gas production reserves have made it one of the world's strategic producers since early 1960s, with many of the existing platforms stretched beyond their original design life. Advances in drilling technology and reservoir assessments have extended the requirement for the service life of those existing platforms even further. Extension of the life span of an existing platform requires satisfactory reassessment of its various structural components, including piled foundations. The American Petroleum Institute Recommended Practice 2A (API RP2A) is com
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9

Dallakoti, Pramish Shakti. "Structural Reliability Study of Highway Bridge Girders Based on AASTHO LRFD Bridge Design Specifications." University of Toledo / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1588538610400668.

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10

Spraul, Charles. "Suivi en service de la durée de vie des ombilicaux dynamiques pour l’éolien flottant." Thesis, Ecole centrale de Nantes, 2018. http://www.theses.fr/2018ECDN0007/document.

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Le travail présenté vise à mettre en place une méthodologie pour le suivi en service de la fatigue mécanique pour l’ombilical dynamique d’un système EMR flottant. L’approche envisagée consiste à simuler à l’aide d’outils numériques la réponse de l’ombilical aux cas de chargement observés sur site. Le post-traitement des résultats de ces simulations devant permettre d’accéder à différentes quantités d’intérêt en tout point du câble. Pour quantifier et réduire l’incertitude sur la réponse calculée de l’ombilical ce dernier doit être instrumenté. Un certain nombre de paramètres du modèle numériqu
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11

Walldén, Eric, and Daniel Peltoniemi. "Förbättringsarbete av en testrigg för elektromagnetiska sensorer." Thesis, Uppsala universitet, Industriell teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-452349.

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Erasteel Kloster i Långshyttan är en stålindustri som bland annat valsar tråd och tunna band.Kvalitén på det valsade stålet undersöks med en elektromagnetisk sensor. Denna sensorkalibreras med hjälp av en testrigg där sensorerna testas med olika provpinnar med defekter.Provpinnarna förs fram och tillbaka genom sensorn som undersöks, vilken ger utslag på dentillkopplade datorn. Dessa utslag används sedan för att kalibrera inställningarna hossensorerna samt för att testa om de fungerar. Syftet med följande studie är att undersöka förbättringsmöjligheterna hos denna testrigg samtta fram ett lösni
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12

Adolfs, Daniel Veiga. "Análise de confiabilidade de peças de madeira fletidas dimensionadas segundo a NBR 7190/97." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-06022012-081149/.

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A passagem do método das tensões admissíveis para o método dos estados limites na NBR 7190 - Projeto de Estruturas de Madeira, ocorrida em 1997, foi feita por meio de calibração determinística que teve como ponto central a resistência da madeira na compressão paralela às fibras. Um dos aspectos modificados foi o dimensionamento de peças fletidas no tocante à verificação das tensões normais devidas ao momento fletor, em que é utilizada a resistência à compressão paralela às fibras. Com a intenção de averiguar o grau de segurança do modelo de cálculo para esse caso, foram realizadas análises de
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Connault, Pierre. "Calibration d'algorithmes de type Lasso et analyse statistique de données métallurgiques en aéronautique." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112041.

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Notre thèse comprend deux parties : l’une méthodologique, l’autre appliquée.La partie méthodologique porte sur le Lasso et une variante de cet algorithme, le Lasso projeté, en vue de leur calibration par pente. Notre méthode tire parti des propriétés de parcimonie du Lasso, en envisageant le problème de sa calibration comme un problème de sélection de modèles, permettant l’emploi de critères pénalisés nécessitant le réglage d’une constante. Pour déterminer la forme de la pénalité et la valeur de la constante, nous adaptons les approches classiques de Birgé et Massart. Ceci permet de dégager la
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14

Pereira, José Cristiano. "Modelo causal para análise probabilística de risco de falhas de motores a jato em situação operacional de fabricação." Niterói, 2017. https://app.uff.br/riuff/handle/1/4078.

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Submitted by Secretaria Pós de Produção (tpp@vm.uff.br) on 2017-07-27T19:21:56Z No. of bitstreams: 1 D2014 - José Cristiano Pereira.pdf: 9830334 bytes, checksum: d5be51799514c74451d0ca3358d7757b (MD5)<br>Made available in DSpace on 2017-07-27T19:21:56Z (GMT). No. of bitstreams: 1 D2014 - José Cristiano Pereira.pdf: 9830334 bytes, checksum: d5be51799514c74451d0ca3358d7757b (MD5)<br>O processo de fabricação de motores a jato é complexo. Perigos e riscos e muitos elementos críticos estão presentes em milhares de atividades necessárias para fabricar um motor. Na investigação realizada nota-se a
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15

Ferreira, Márcio André Nazareno. "CALIBRAÇÃO DE DADOS PARA ESTUDOS DE CONFIABILIDADE EM REDES DE DISTRIBUIÇÃO: MODELAGEM DA CONDIÇÃO DOS EQUIPAMENTOS E DOS ÍNDICES DE CONTINUIDADE NODAIS." Universidade Federal do Maranhão, 2010. http://tedebc.ufma.br:8080/jspui/handle/tede/448.

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Made available in DSpace on 2016-08-17T14:53:12Z (GMT). No. of bitstreams: 1 Marcio Andre Nazareno Ferreira.pdf: 1733085 bytes, checksum: 163ab439fd1be9f3bb9050a8433d34e2 (MD5) Previous issue date: 2010-08-06<br>After the restructuring of the electric sector, the distribution utilities must maximize the reliability to avoid violation in the reliability targets at the minimal cost. This agreement between cost and reliability can be satisfied with the application of Predictive Reliability Analysis (PRA) in the planning of distribution networks. The PRA estimates the future performance of dis
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16

Junior, Antonio Carlos de Souza. "Aplicação de confiabilidade na calibração de coeficientes parciais de segurança de normas brasileiras de projeto estrutural." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-15062009-090502/.

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Neste trabalho é realizado o estudo dos coeficientes parciais de segurança utilizados em normas de projeto estrutural. O trabalho é fundamentado na teoria de confiabilidade estrutural, que permite uma representação explícita das incertezas envolvidas em resistências e ações, e resulta em uma estimativa quantitativa da segurança estrutural: o índice de confiabilidade. O trabalho aborda uma metodologia de calibração de norma que permite obter o conjunto de coeficientes parciais de segurança que minimiza as variações dos índices de confiabilidade das mais diversas estruturas projetadas segundo um
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17

Ducros, Florence. "Maintien en conditions opérationnelles pour une flotte de véhicules : étude de la non stabilité des flux de rechange dans le temps." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS213/document.

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Dans cette thèse, nous proposons une démarche méthodologique permettant de simuler le besoin en équipement de rechange pour une flotte de véhicules. Les systèmes se dégradent avec l’âge ou l’usage, et sont défaillants lorsqu’ils ne remplissent plus leur mission. L’usager a alors besoin d’une assurance que le système soit opérationnel pendant sa durée de vie utile. Un contrat de soutien oblige ainsi l’industriel à remédier à une défaillance et à maintenir le système en condition opérationnelle durant la durée du contrat. Ces dernières années, la mondialisation et l’évolution rapide des technolo
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18

Kouicem, Kamel. "Analyse et correction des erreurs résiduelles sur analyseur de réseau hyperfréquence : développement de méthodes relatives à la méthode d'autocalibrage TRL." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0204.

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Le domaine de recherche auquel je m'interesse est l'etude de nouveaux composants (composants semi-conducteurs, composants microondes, composants d'optique integre) et leurs applications pour realiser des circuits et systemes de telecommunication terrestre et spatiale et d'instrumentation electronique et optique. Pour obtenir des mesures de bonne qualite sur ces composants, il est necessaire d'utiliser des appareils de grandes performances. Neanmoins, des erreurs de mesure subsistent toujours. Le but de mon travail de recherche est la correction de ces erreurs le plus efficacement possible. Pou
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19

Frank, Petr. "Metodika zabezpečování optimální přesnosti měření v souladu s metrologickou konfirmací." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-233462.

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This thesis deals with the evaluation of accuracy of measurement and achieving the required accuracy level. This includes global analysis of the uncertainty evaluation, the calibration interval design and the creation of confirmation system. Basis of this work is in identification of all possible problems, which may occur during evaluation of accuracy and achieving the required accuracy level. The analysis is followed by suggested solutions for identified problems. It means namely the selection of probability distribution in case of uncertainty type A, evaluation of degrees of freedom in case
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20

Sue, Chia-Wei, and 蘇嘉瑋. "Calibration of Reliability-based Resistance Factorsfor Soil Anchors in Taipei Basin." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/96389304639409610411.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>96<br>The goal of this research is to calibrate the reliability-based resistance factor of flush drilled soil anchors for their ultimate pullout capacities based on in-situ anchor pullout test data in the alluvial soil underlying the Taipei basin. Efforts are taken to quantify the uncertainties with a full probabilistic analysis approach. The resistance factor is calibrated based on the in-situ test results of 46 anchors with a rigorous theoretical approach which constructs the relationship between the resistance factor and failure probability. With this relationship
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Sharma, Hrishikesh. "Performance-Based Reliability Analysis and Code Calibration for RC Column Subject to Vehicle Collision." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10794.

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Infrastructure and transportation facilities have increased rapidly over the years. The progress has been accompanied by an increasing number of vehicle collisions with structures. This type of collision might lead to the damage, and often, collapse of the structure. In reinforced concrete (RC) structures, columns are usually the most vulnerable members exposed to collisions. However, the existing design guidelines and provisions for protection of these members against collision of vehicles are not adequate. In particular, the desired behavior and the associated performance levels of a st
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22

Yao, Congpu. "LRFD Calibration of Bridge Foundations Subjected to Scour and Risk Analysis." Thesis, 2013. http://hdl.handle.net/1969.1/149453.

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Bridge scour is the loss of soil by erosion due to water flowing around bridge supports. Scour has been the number one cause of bridge collapse in the United States with an average rate of 22 bridges collapsing each year. This dissertation addresses three topics related to bridge scour. First, three sets of databases are used to quantify the statistical parameters associated with the scatter between the predicted and measured scour depth as well as the probability that a deterministically predicted scour depth will be exceeded. The analysis results from these databases will also be used to
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23

Yen, Ming-Tso, and 顏銘佐. "Model Selection Issue in Calibrating Reliability-based Resistance FactorsBased on Geotechnical In-situ Test Data." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/90295880227623434373.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>96<br>This paper addresses the model selection issue often encountered in the process of calibrating reliability-based resistance factors. As well known, a predictive model must be assumed for the purpose of calibrating resistance factors based on in-situ test data. A critical question is raised by this research: which predictive model should we choose? What type of probability distribution model should we pick to model the model uncertainties? Those are important questions to ask because the calibration results seriously depend on the assumed predictive and probabil
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Kurniawan, Erry Dwi, and Erry Dwi Kurniawan. "Hot Carrier Injection (HCI) Reliability and Isolation Voltage Calibration of 80V High-Side NLDMOS and Transient Voltage Suppressor (TVS) Diode." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/fc38ww.

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碩士<br>亞洲大學<br>資訊工程學系<br>102<br>In this recent year, there has been a growing research interest in the area of power devices for various electronic applications, such as power management IC, ESD protection, switching devices, and Radio Frequency (RF) base station application. Lateral Diffused Metal Oxide Semiconductor (LDMOS) is the dominant device technology used in high power amplifiers and high voltage application. Power diode such as Transient Voltage Suppressor (TVS) diode also important for protecting sensitive semiconductors from damaging effects of transient voltages. This thesis consis
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Heleno, Bruno da Costa. "Aplicação da manutenção centrada na fiabilidade a dispositivos médicos." Master's thesis, 2014. http://hdl.handle.net/10400.14/17422.

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A generalidade dos estabelecimentos de prestação de cuidados de saúde é de opinião de que os custos de manutenção dos equipamentos médicos de sua propriedade são demasiado elevados. É também conhecida a ausência de procedimentos rigorosos visando a certificação da calibração e do desempenho adequado dos instrumentos de medida, comprometendo assim a segurança dos profissionais da saúde e até mesmo dos utentes. A gestão da manutenção de dispositivos médicos surge como uma ferramenta fundamental para garantir níveis elevados de fiabilidade, disponibilidade, segurança e eficiência técnica e econó
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Manohar, Usha. "Modeling and Analysis of Water Distribution Systems." Thesis, 2014. http://etd.iisc.ac.in/handle/2005/2992.

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In most of the urban cities of developing countries piped water supply is intermittent and they receive water on alternate days for about few hours. The Unaccounted For Water (UFW) in these cities is very high due to aged infrastructure, poor management and operation of the system. In the cities of developing countries, supplied water is not able to meet the demand and there is huge gap between supply and demand of water. To meet the water demand people are depending on other sources of water like groundwater, rain water harvesting, waste water treatment, desalination etc. Huge quantity of gro
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Manohar, Usha. "Modeling and Analysis of Water Distribution Systems." Thesis, 2014. http://etd.iisc.ernet.in/handle/2005/2992.

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In most of the urban cities of developing countries piped water supply is intermittent and they receive water on alternate days for about few hours. The Unaccounted For Water (UFW) in these cities is very high due to aged infrastructure, poor management and operation of the system. In the cities of developing countries, supplied water is not able to meet the demand and there is huge gap between supply and demand of water. To meet the water demand people are depending on other sources of water like groundwater, rain water harvesting, waste water treatment, desalination etc. Huge quantity of gro
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