نتایج جستجو برای: normal hazard model
تعداد نتایج: 2635263 فیلتر نتایج به سال:
A new approach to moral hazard is presented. Once local incentive compatibility is satisfied, the problem of verifying global incentive compatibility is shown to be isomorphic to the problem of comparing two classes of distribution functions. Thus, tools from choice under uncertainty can be brought to bear on the problem. The approach allows classic justifications of the first-order approach (F...
Abstract Background and purpose: Coronary artery disease is one of the major causes of death worldwide and analysis of survival data is important in these patients. The Cox model not only calculates the hazard function but also introduces other significant variables. Materials and methods: 128 patients referred to Mazandaran Heart Center from 2005 to 2007 and treated by angioplasty were fol...
for all j ≥ 2 and k < j. These conditionals are normal distributions since we assume Y |S is multivariate normal. Suppose that there exists j such that ps(yj|yj−1) is not the same for all s ≥ j. Then from (1), p≥j(yj|yj−1) will be a mixture of normals whereas pk(yj|yj−1) will be a normal distribution. Thus, Molenbergh’s condition will not be satisfied, i.e. the MAR constraints do not exist. On ...
In this research, logistic regression analysis was used to create a landslide hazard map for Sajaroud basin. At first, an inventory map of 95 landslides was used to preduce a dependent variable, which takes a value of 0 for absence and 1 for presence of landslides. Ten factors affecting landslide occurence such as elevation , slope gradient, slope aspect, slope curvature, rainfall, distance fro...
We examine a new general class of hazard rate models for duration data, containing parametric and nonparametric component. Both can be mix time effect possibly time-dependent covariate effects. A number well-known are special cases. In counting process framework, profile likelihood estimator is developed the component model shown to asymptotically normal efficient. Finite sample properties inve...
Identifying areas with different potential to landslide occurrence is one of the primitive actions in natural resources management. In view of importance of recognizing appropriate metho d to estimate landslide, in this research, the efficiency of two methods of landslide hazard zonation including methods of Mora and Varson and Multivariate regression were compared . In this research, first, ...
BACKGROUND We investigated the risk of cancer mortality according to obesity status and metabolic health status using sampled cohort data from the National Health Insurance system. MATERIALS AND METHODS Data on body mass index and fasting blood glucose in the sampled cohort database (n=363,881) were used to estimate risk of cancer mortality. Data were analyzed using a Cox proportional hazard ...
electric power industry have always try to provide reliable electricity to customers and at the same time decrease system costs. high voltage circuit-breakers are an essential part of the power network. this study has developed a maintenance and replacement scheduling model for high voltage circuit- breakers that minimize maintenance costs while maintaining the acceptable reliability. this mode...
The results of a Monte Carlo study of the size and power of parametric and semiparametric approaches to inference on covariate effects in survival (time-to-events) models in the presence of model misspecification and an independent censoring mechanism are reported. Basic models employed are a parametric model, where both a baseline distribution and the dependence structure of covariates on the ...
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