Global ETD Search
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Showing 1 to 5 of 5 for “"Covariate process"”.
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Optimal inspection and maintenance for stochastically deteriorating systems
… may be modelled by a continuous time stochastic process. Our emphasis is mainly on using the information gained from inspecting the degradation to determine efficient maintenance and inspection policies. The system we shall consider is one in which the degradation is modelled by a Levy process, …
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Optimal replacement in the proportional hazards model and its applications in a product-service system
… policies for systems whose deterioration process follows the PHM are developed under different settings; and a joint optimization of the asset and inventory management problem in the context of a product-service system is considered.</p> <p>In the first paper, a continuous time Markov …
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Self-controlled methods for postmarketing drug safety surveillance in large-scale longitudinal data
… controls for fixed multiplicative baseline covariates since each individual acts as their own control. In addition, only exposed cases are required for the analysis, which is computationally advantageous. In the first part of this work we present how the simple SCCS model can be applied to …
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Statistical Predictions Based on Accelerated Degradation Data and Spatial Count Data
… model is then extended to allow for time-varying covariates and is used to predict outdoor degradation where the explanatory variables are time-varying. Chapter 3 introduces a class of models for analyzing degradation data with dynamic covariate information. We use a general path model with random …
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Statistical Modeling and Predictions Based on Field Data and Dynamic Covariates
… general path model to incorporate dynamic covariates into degradation data analysis. Dynamic covariates include time-varying environmental variables and usage condition. The shapes of the effect functions of covariates may be constrained to be, for example, monotonically increasing (i.e., …