Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"Weibull Model"”.
-
Weighted Inverse Weibull and Beta-Inverse Weibull Distribution
<p>The weighted inverse Weibull distribution and the beta-inverse Weibull distribution are considered. Theoretical properties of the inverse Weibull model, weighted inverse Weibull distribution including the hazard function, reverse hazard function, moments, moment generating function, coefficient …
-
Alternative estimation methods for survival models
… of two types of three parameter survival models for the force of mortality, the Makeham model and the Weibull model. The existing methods for estimating these parameters by the method of least-squares include using a log-transformation on the force of mortality data. We will propose …
-
Comparison of parametric models using right censored data for breast cancer patients
… data by using three different parametric models; exponential model, Weibull model, and log-logistic model. Data of breast cancer patients from general hospital in Johor Bahru were used to illustrate the right censoring data. When analyzing the breast cancer data, all three distributions …
-
A stochastic model for daily climate
… whether climate variables could be usefully modelled on a daily basis. Three stochastic models are considered for the description of daily climate sequences, which can then be used to generate artificial sequences. The climate variables under consideration are rainfall, maximum and minimum …
-
Bayesian analysis of spatial and survival models with applications of computation techniques
… methodologies of applying Bayesian hierarchical models to different data with geographical characteristics or with right-censored failure time. A conditional autoregressive (CAR) prior is used for the model to capture spatial effects. Markov chain Monte Carlo (MCMC) methods are used in the …
-
Impacts of low-water activity food type on inactivation kinetics and models of foodborne pathogens treated with low-temperature, vacuum-assisted steam processing
… to remove pathogen contamination from LWAF, modeling the inactivation of such treatments, and studying the thermal resistances of two E. coli strains in low-water activity solutions. Low-temperature, vacuum-assisted steam (vacuum-steam) was evaluated as a potential intervention and preventive …
-
Techniques for comparing efficacy and cost-effectiveness of cancer therapies, and improved inference tools
… in a hierarchical Bayesian random-effects model to assess the role of immunotherapies and targeted therapies. We also evaluate the impact of immunotherapy biomarkers within a hierarchical Bayesian setting with a view to support and improve the therapeutic decision-making process. Chapter 3 …
-
A systematic study of the effect of ultrasound on food enzymes and bioactives in model and real food systems (strawberry puree)
… kinetics upon sonication followed a first order model, whereas those of PPO fitted to the Weibull model. Fluorescence analysis of US treated samples of HRP revealed the removal of the haem from the active centre and the formation of di-tyrosine, possibly mediated by the production of hydrogen …
-
Scaling Effects on Damage Development, Strength, and Stress-Rupture Life on Laminated Composites in Tension
… 24 cases were predicted using Zhang's shear-lag model and data generated from cross-ply tests. Laminate strength was controlled by the initiation of a triangular-shaped local delamination of the surface angle plies. This delamination was predicted using O'Brien's strain energy release rate model …
-
Reliability and failure analysis of composite beams and plates containing stress concentrations
… used in the literature, are also used. The model is based on Weibull statistics. The Weibull model was extended to account for the three-dimensional stress field including interlaminar stresses. The effect of interlaminar stresses on the total reliability is investigated. Various failure …
-
Adaptable Design Improvements For Electromagnetic Shock Wave Lithotripters And Techniques For Controlling Cavitation
… to isolate mechanisms of fragmentation, and models for wave propagation, fragmentation, and stone motion were developed. In the initial study, a representative EM lithotripter was characterized and tested for in vitro stone comminution efficiency at a variety of field positions and doses …
-
Formulation of Hyaluronidase Enzyme Sensitive Topical Nanomicrobicides for HIV Virus Transmission Prevention
… release from NFs followed the Peppas kinetic model whereas, in the presence of HAase, NFs followed Weibull model. The HA-SH-NFs were non-cytotoxic to vaginal VK2/E6E7 and End1/E6E7 v cells and L. crispatus bacteria for 48 h. The results suggested that TFV loaded HA-SH-NFs templates developed …