Sökning: "covariates"
Visar resultat 11 - 15 av 131 avhandlingar innehållade ordet covariates.
11. Methods for improving covariate balance in observational studies
Sammanfattning : This thesis contributes to the field of causal inference, where the main interest is to estimate the effect of a treatment on some outcome. At its core, causal inference is an exercise in controlling for imbalance (differences) in covariate distributions between the treated and the controls, as such imbalances otherwise can bias estimates of causal effects. LÄS MER
12. On efficient use of censored data and covariate factors in survival analysis and maintenance scheduling
Sammanfattning : This thesis deals with survival analysis and maintenance scheduling, two important issues to achieve efficient use of different production systems. In survival analysis of failure time data, the survival function and the cumulative hazard function are important reliability characteristics. LÄS MER
13. Product support and spare parts considering system reliability and operating environment
Sammanfattning : The required spare parts planning for a system/machine is an integral part of the product support strategy. The number of required spare parts can be effectively estimated on the basis of the product reliability characteristics. LÄS MER
14. Bayesian Sequential Inference for Dynamic Regression Models
Sammanfattning : Many processes evolve over time and statistical models need to be adaptive to change. This thesis proposes flexible models and statistical methods for inference about a data generating process that varies over time. The models considered are quite general dynamic predictive models with parameters linked to a set of covariates via link functions. LÄS MER
15. Reliability and operating environment based spare parts planning
Sammanfattning : The required spare parts planning for a system/machine is an integral part of the product support strategy. The number of required spare parts can be effectively estimated on the basis of the product reliability characteristics. LÄS MER