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Dissertations / Theses on the topic 'TTF Time to failure'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

LYRA, Rodrigo Silva Pereira de. "Dimensionamento de sobressalentes: um estudo de caso baseado no conhecimento a priori." Universidade Federal de Pernambuco, 2010. https://repositorio.ufpe.br/handle/123456789/5420.

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Made available in DSpace on 2014-06-12T17:39:28Z (GMT). No. of bitstreams: 2 arquivo516_1.pdf: 2278956 bytes, checksum: 44db0be5f0ee5ab60ac2d74f76fd8ab3 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2010<br>O dimensionamento do estoque de sobressalentes constitui uma das mais criticas etapas no planejamento dos recursos de manutenção em função do impacto destes estoques sobre o desempenho dos equipamentos, através dos tempos de manutenção e do montante financeiro envolvido nesta atividade. Este trabalho trata de um estudo de caso envo

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2

Li, Yi-Hwei. "Regression analysis of failure time data /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487694702784082.

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3

Al-Nefaiee, Abdullah Homod O. "Nonparametric predictive inference for system failure time." Thesis, Durham University, 2014. http://etheses.dur.ac.uk/10877/.

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This thesis presents the use of signatures within nonparametric predictive inference (NPI) for the failure time of a coherent system with a single type of components, given failure times of tested components that are exchangeable with those in the system. NPI is based on few modelling assumptions and here leads to lower and upper survival functions. We also illustrate comparison of reliability of two systems, by directly considering the random failure times of the systems. This includes explicit consideration of the difference between failure times of two systems. In this method we assume that

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4

Billah, Baki. "The analysis of multivariate incomplete failure time data." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1995. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq25823.pdf.

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5

Gorelick, Jeremy Sun Jianguo. "Nonparametric analysis of interval-censored failure time data." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/7009.

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Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 26, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Dissertation advisor: Dr. (Tony) Jianguo Sun. Includes bibliographical references.

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6

Xie, Xiangwen. "Covariate measurement error methods in failure time regression /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/9538.

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7

Roth, Karen. "Time-Dependent Rock Failure at Kartchner Caverns, Arizona." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/613408.

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Assessing long-term rock stability is an important aspect in the analysis of slopes, dam and bridge foundations, and other infrastructure. Rock behavior over tens to thousands of years must be anticipated when predicting the performance of, for example, an underground containment facility for nuclear waste. At such long time scales, the time dependence of rock failure, typically ignored in short time scale analyses, has a significant effect and must be included in the analysis. Since time-dependent rock behavior is thought to be caused by the subcritical growth of microcracks, a time-depend

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8

Wang, Lianming. "Statistical analysis of multivariate interval-censored failure time data." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4375.

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Thesis (Ph.D.)--University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (May 2, 2007) Vita. Includes bibliographical references.

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9

Wang, Yaqin. "Estimation of accelerated failure time models with random effects." [Ames, Iowa : Iowa State University], 2006.

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10

Hu, Chengcheng. "Semiparametric failure-time regression with mismeasured or missing covariates /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/9533.

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11

Chen, Ping Sun Jianguo. "Statistical analysis of failure time data with missing information." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/6144.

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Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 11, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Dissertation advisor: Dr. (Tony) Jianguo Sun. Vita. Includes bibliographical references.

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12

Zhao, Qiang. "Nonparametric treatment comparisons for interval-censored failure time data /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p3144474.

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13

Cai, Jianwen. "Generalized estimating equations for censored multivariate failure time data /." Thesis, Connect to this title online; UW restricted, 1992. http://hdl.handle.net/1773/9581.

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14

Chen, Man-Hua. "Statistical analysis of multivariate interval-censored failure time data." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4776.

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Thesis (Ph.D.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on March 6, 2009) Includes bibliographical references.

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15

Fan, Juanjuan. "Dependency estimation over a finite bivariate failure time region /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/9548.

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16

Liljefors, Felix. "Time dependent modeling of turbocharger failure using machine learning." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-287451.

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Data-driven predictive vehicle maintenance can in principle reduce the risk of costly breakdowns, damaged cargo, and increased emissions due to faulty components. However, implementing a cost efficient predictive maintenance policy is far from trivial. This thesis presents a machine learning-based method for predicting turbocharger component failure in heavy-duty trucks, called Survival-PLSTM. Survival-PLSTM uses a recurrent neural-network to model time-series data of a vehicle’s operational history, and outputs an approximated cumulative hazard function. The method addresses a number of chall

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17

Zhu, Chao. "Nonparametric and semiparametric methods for interval-censored failure time data." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4415.

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Thesis (Ph.D.)--University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (May 2, 2007) Vita. Includes bibliographical references.

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18

Mokveld, Philip Jan. "The accelerated failure time model under cross sectional sampling schemes." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2007. http://dare.uva.nl/document/48642.

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19

Wan, Ismail Wan Sazaley. "Electromigration time-to-failure analysis using a lumped element model." Thesis, Loughborough University, 2001. https://dspace.lboro.ac.uk/2134/33653.

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This thesis presents a theoretical and computer simulation of electromigration behaviour in the Integrated Circuit (IC) interconnection, with a particular emphasis on the analysis of the time-to-failure (TTF) produced through the Lumped Element model. The current and most accepted physical model for electromigration is the Stress Evolution Model which forms the basis for the development of the current Lumped Element Model. For early failures, and ignoring transport through the grain bulk, the problem reduces to that of solving the equations for stress evolution equation on the complex grain bo

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20

Liu, Xiaobo. "Optimal Timing to Start Treatment Using Structural Failure Time Models." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1532132805119808.

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21

Berridge, Damon M. "Analysis of failure time data with ordered categories of response." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292953.

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22

Wong, Kin-yau, and 黃堅祐. "Analysis of interval-censored failure time data with long-term survivors." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B48199473.

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Failure time data analysis, or survival analysis, is involved in various research fields, such as medicine and public health. One basic assumption in standard survival analysis is that every individual in the study population will eventually experience the event of interest. However, this assumption is usually violated in practice, for example when the variable of interest is the time to relapse of a curable disease resulting in the existence of long-term survivors. Also, presence of unobservable risk factors in the group of susceptible individuals may introduce heterogeneity to the po

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23

Rao, Shashi. "Some studies in simultaneous failure in equipment items." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/41607.

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This study can be classified under the subject of equipment item replacement analysis. Simultaneous failure, SF, of the components of an equipment item, EI, is the topic of this thesis. Examination of the possibility of designing components of an EI for SF is one objective of the study. The motive for this objective is the belief that SF designs of EI minimize the total cost of acquiring and operating the EI. Examination of the strength of materials reveals that design life of components is not sufficiently flexible to realize SF, and design requirements can predetermine design life. This is

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24

Bouadoumou, Maxime K. "Jackknife Empirical Likelihood for the Accelerated Failure Time Model with Censored Data." Digital Archive @ GSU, 2011. http://digitalarchive.gsu.edu/math_theses/112.

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Kendall and Gehan estimating functions are used to estimate the regression parameter in accelerated failure time (AFT) model with censored observations. The accelerated failure time model is the preferred survival analysis method because it maintains a consistent association between the covariate and the survival time. The jackknife empirical likelihood method is used because it overcomes computation difficulty by circumventing the construction of the nonlinear constraint. Jackknife empirical likelihood turns the statistic of interest into a sample mean based on jackknife pseudo-values. U-stat

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25

Hodge, Martin Owen Petroleum Engineering Faculty of Engineering UNSW. "Avoiding borehole failure by time-dependent stability analysis of stressed poroelastic rocks." Awarded by:University of New South Wales. School of Petroleum Engineering, 2006. http://handle.unsw.edu.au/1959.4/27270.

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Wellbore stability is a critical issue when drilling through tectonically stressed and complex geological conditions. Understanding wellbore stability issues before a well is drilled enables better planning of the drilling operation and helps to avoid borehole failure. This is of particular importance in underbalanced drilling where we are limited with our choice of drilling mud densities. This thesis examines the impact of fluid pressure change on wellbore stability during underbalanced drilling by using a timedependent poroelastic model. The poroelastic behaviour is analysed using numerical

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26

Korhonen, Pasi. "Accelerated failure time models for non-ignorable non-compliance in randomized studies." Helsinki : University of Helsinki, 2000. http://ethesis.helsinki.fi/julkaisut/mat/rolfn/vk/korhonen/.

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27

Qi, Lihong. "Analysis of failure time data under risk set sampling and missing covariates /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/9550.

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28

Wilson, Joshua Parker. "Extending Time Until Failure During Leaking in Inflatable, Pneumatically Actuated Soft Robots." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6264.

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Soft robots and particularly inflatable robots are of interest because they are lightweight, compact, robust to impact, and can interact with humans and their environment relatively safely compared to rigid and heavy traditional robots. Improved safety is due to their low mass that results in low-energy collisions and their compliant, soft construction. Inflatable robots (which are a type of soft robot) are also robust to impact and have a high torque to weight ratio. As a result inflatable robots may be used for many applications such as space exploration, search and rescue, and human-robot i

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29

Tran, Tram. "A stochastic model of component failure mechanisms." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/80057.

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The progress of a unimolecular chemical degradation reaction is used in representing a component failure mechanism. The component is said to fail when the concentration of reaction product accumulates beyond an acceptable level. The process of accumulating reaction product is modelled as a Markov pure birth process which, in turn, is used in developing the failure time distribution. The model is analyzed under the assumption that the reaction rate is constant. Also, the initial state and the final state of the degradation process are assumed to be Poisson variables. Based on numerical examples

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30

Lu, Yinghua. "Empirical Likelihood Inference for the Accelerated Failure Time Model via Kendall Estimating Equation." Digital Archive @ GSU, 2010. http://digitalarchive.gsu.edu/math_theses/76.

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In this thesis, we study two methods for inference of parameters in the accelerated failure time model with right censoring data. One is the Wald-type method, which involves parameter estimation. The other one is empirical likelihood method, which is based on the asymptotic distribution of likelihood ratio. We employ a monotone censored data version of Kendall estimating equation, and construct confidence intervals from both methods. In the simulation studies, we compare the empirical likelihood (EL) and the Wald-type procedure in terms of coverage accuracy and average length of confidence int

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31

Lynch, James Charles. "A flexible class of models for regression modelling of multivariate failure time data /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/9561.

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32

Mahmoud, Herman Abdulqadir Mahmoud. "Real-time operational response methodology for reducing failure impacts in water distribution systems." Thesis, University of Exeter, 2018. http://hdl.handle.net/10871/33492.

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Interruption to water services and low water pressure conditions are commonly observed problems in water distribution systems (WDSs). Of particular concern are the unplanned events, such as pipe bursts. The current regulation in the UK requires water utilities to provide reliable water service to consumers resulting in as little as possible interruptions and of as short possible duration. All this pushes water utilities toward developing and using smarter responses to these events, based on advanced tools and solutions. All with the aim to change network management style from reactive to a pro

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33

Johnston, Alexandre Charles. "Time, alternation, and the failure of reason : Sophoclean tragedy and Archaic Greek thought." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/29592.

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This thesis examines the place, influence, and deployment of archaic Greek thought in Sophocles’ extant tragedies, paying close attention to the ethical and theological content of the plays as well as to their dramatic and literary fabric. I use archaic thought as an umbrella term for a constellation of ideas on the human condition and the gods which is first attested, in Greece, in Homeric epic, but has a long and variegated existence in other contexts and after the archaic period. The thesis consists of six chapters, divided in two parts. The first part provides a general conceptual framewor

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34

Tarog, Emanuel S. "Design techniques to improve time dependent dielectric breakdown based failure for CMOS circuits." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/229.

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This project investigates the failure of various CMOS circuits as a result of Time Dependent Dielectric Breakdown (TDDB) and explores design techniques to increase the mean time to failure (MTTF) of large-scale circuits. Time Dependent Dielectric Breakdown is a phenomenon where the oxide underneath the gate degrades as a result of the electric field in the material. Currently, there are few well documented design techniques that can increase lifetime, but with a tool chain I created called the MTTF Analyzing Program, or MAP, I was able to test circuits under various conditions in order to ide

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35

Cooper, Elizabeth Susan. "Application of polymer ageing models to cable geometry and time-to-failure distributions." Thesis, University of Leicester, 2002. http://hdl.handle.net/2381/9984.

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Polymer ageing models predict the working lifetime of polymeric insulation in terms of the electrical and thermal stresses to which it is subjected. Two such models are investigated in this thesis and are found to be mathematically similar even though they are based on different mechanisms for the way in which an electric field accelerates the ageing process. It is shown that both models can successfully fit characteristic time-to-failure data from ageing experiments involving thin films. A new method is developed to allow the ageing models to be applied to cable insulation, where the field an

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36

Das, Arindam Kumar. "Minimum power broadcast and maximization of time-to-first-failure in broadcast wireless networks /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/5912.

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37

Hu, Wenhua. "Joint analysis of longitudinal data and competing risks failure time data a bayesian approach /." Diss., Restricted to subscribing institutions, 2007. http://proquest.umi.com/pqdweb?did=1495959091&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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38

Ellington, Jelani H. (Jelani Hester). "The optimization of General Motors' warranty system by reducing mean time to discover failure." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32474.

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Thesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, 2005.<br>Includes bibliographical references (p. 54).<br>Warranty is an important part of many organizations. Warranty costs take money directly away from corporations' bottom line. General Motors Corporations warranty liability costs its shareholders upwards of billion dollars annually. General Motors currently uses RedX, a systematic design of experiments methodology, to try to reduce warranty costs. Although this approach has reduced warranty costs, it has not done so neither fast nor sufficiently as

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39

Goodall, R. L. "Analysis of interval-censored failure time data with application to studies of HIV infection." Thesis, University College London (University of London), 2007. http://discovery.ucl.ac.uk/1446247/.

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In clinical trials and cohort studies the event of interest is often not observable, and is known only to have occurred between the visit when the event was first observed and the previous visit such data are called interval-censored. This thesis develops three pieces of research that build upon published methods for interval-censored data. Novel methods are developed which can be applied via self-written macros in the standard packages, with the aim of increasing the use of appropriate methods in applied medical research. The non-parametric maximum likelihood estimator 1,2 (NPMLE) is the most

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40

Pan, Xiang. "Deep Transfer Learning Applied to Time-series Classification for Predicting Heart Failure Worsening Using Electrocardiography." Digital WPI, 2020. https://digitalcommons.wpi.edu/etd-dissertations/615.

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Computational ECG (electrocardiogram) analysis enables accurate and faster diagnosis and early prediction of heart failure related symptoms (heart failure worsening). Machine learning, particularly deep learning, has been applied for ECG data successfully. The previous applications, however, either mainly focused on classifying occurrent, known patterns of on-going heart failure or heart failure related diseases such arrhythmia, which have undesirable predictability beforehand, or emphasizing on data from pre-processed public database data. In this dissertation, we developed an approach, howev

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41

Krachey, Elizabeth Catherine. "Variations on the Accelerated Failure Time Model: Mixture Distributions, Cure Rates, and Different Censoring Scenarios." NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-08182009-102357/.

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The accelerated failure time (AFT) model is a popular model for time-to-event data. It provides a useful alternative when the proportional hazards assumption is in question and it provides an intuitive linear regression interpretation where the logarithm of the survival time is regressed on the covariates. We have explored several deviations from the standard AFT model. Standard survival analysis assumes that in the case of perfect follow-up, every patient will eventually experience the event of interest. However, in some clinical trials, a number of patients may never experience such an event

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Kang, Sangwook Cai Jianwen. "Statistical methods for case-control and case-cohort studies with possibly correlated failure time data." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2007. http://dc.lib.unc.edu/u?/etd,1244.

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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2007.<br>Title from electronic title page (viewed Mar. 26, 2008). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Biostatistics, School of Public Health." Discipline: Biostatistics; Department/School: Public Health.

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43

Hasan, Md Tariqul. "Analysis of longitudinal failure time data /." 2004.

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Hu, Ming-Jen, and 胡銘仁. "Real-Time Logging and Failure Recovery." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/45519154521895807800.

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碩士<br>長榮管理學院<br>經營管理研究所<br>90<br>Real-time are increasingly being used as an integral part of many computer systems. During normal operation, transactions in real-time databases must be executed in such a way that transaction timing and data time validity constraints can be met. Real-time databases must also prepare for possible failures and provide fault tolerance capability. Principles for fault tolerance in real-time databases must take timing requirements into consideration and are distinct from those for conventional databases. We discuss these issues in this thesis and describe a logging

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Srinivas, Mullahalli V. "Time dependent failure of thin films." Thesis, 1994. https://thesis.library.caltech.edu/6070/1/Srinivas_mv_1994.pdf.

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The prediction of time dependent failure at the interface of a thin film bonded to a substrate is considered in terms of a thermorheologically simple viscoelastic material. An initial investigation of stress distribution at the interface is carried out to understand the possible location and the mechanism of failure. Subsequently, a detailed analysis is developed to obtain not only the longitudinal stress component but also the lateral and shear stress components at the interface. Viscoelastic material behavior is included in the model to account for the stress relaxation behavior of the film.

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Lee, Eric Weijun. "Regression analysis for correlated failure time data." 1991. http://catalog.hathitrust.org/api/volumes/oclc/25646397.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1991.<br>Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 87-92).

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NIU, YI. "Marginal Models for Modeling Clustered Failure Time Data." Thesis, 2013. http://hdl.handle.net/1974/7796.

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Clustered failure time data often arise in biomedical and clinical studies where potential correlation among survival times is induced in a cluster. In this thesis, we develop a class of marginal models for right censored clustered failure time data and propose a novel generalized estimating equation approach in a likelihood-based context. We first investigate a semiparametric proportional hazards model for clustered survival data and derive the large sample properties of the regression estimators. The finite sample studies demonstrate that the good applicability of the proposed method as well

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48

Lin, Jin-Sying. "Linear regression analysis for multivariate failure time observations." 1991. http://catalog.hathitrust.org/api/volumes/oclc/26228833.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1991.<br>Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 88-93).

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YANG, MIN-JU, and 楊閔茹. "The estimation method for clustered failure time data." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/nez45q.

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碩士<br>國立臺北大學<br>統計學系<br>106<br>Joint likelihood estimation and pairwise likelihood estimation for clustered data in multivariate failure time (MVFT) are evaluated, and data are assumed to have a characteristic of competing risks. This study will consider two or three observations per cluster and use Weibull distribution as the marginal distribution and different Copula to construct a joint survival distribution. Using statistical software to simulate data, parameter estimation is performed. The main estimated parameters are the parameters in the marginal distribution and the dependence paramet

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50

"Failure detection and identification in linear time-invariant systems." Laboratory for Information and Decision Systems], Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/2940.

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