We develop a generalized Extended Linear Hazard Regression (ELHR) model with linear time-varying coefficients to estimate reliability under normal operating conditions using failure time data obtained from accelerated conditions. The model considers the proportional hazards effect, time-varying coefficients effect as well as time-scale changing effect. Extensive simulation experiments demonstra...

the entire land in the southern iran faces problems arising out of various types of land degradation, of which the vegetation type forms one of the major ones. the payab basin (522,470 ha), which covers the lower reaches of mond river, was chosen for a test risk assessment of this type. the different kinds of data for indicators of vegetation degradation were taken from the records and publishe...

A critical stage in drought risk assessment is the measurement of hazard, probability occurrence a potentially damaging event. The standard approach to assess hazard based on standardized precipitation index (SPI) and intensity classification established according fixed set SPI values. We show that this method does not allow for region-specific hazards, we propose an alternative extreme value t...

Urbanization is a pervasive global trend. The development of residential areas and road network in Hajighoshan watershed (northern Iran) has been observed in the recent several decades. The objective of this study is the quantitative investigation of the effects of impervious surfaces development and urban development on runoff generation and flood hazard. The study of urban area development wa...

Pavement rehabilitation could affect the accident severity index (ASI) since restoration measures means more safety for road users. No research or project has been carried out to identify hazard points to build a linear model based on crash severity index. One of the very popular accident severity index models used in all countries is based on linear models to rehabilitate pavements and this pa...

Parametric and semiparametric methods often fail to capture the right shape of the conditional hazard rate in survival analysis. In this paper we propose a new and intuitive nonparametric estimator for the conditional hazard rate, based on local linear estimation techniques. This estimator can deal with both censored and uncensored data. We show that the local linear hazard rate estimator is co...

OBJECTIVE To compare cardiovascular risk among women with high normal blood pressure (130-9/85-9 mm Hg) against those with normal blood pressure (120-9/75-84 mm Hg) and those with baseline hypertension. DESIGN Prospective cohort study. SETTING Women's health study, United States. PARTICIPANTS 39 322 initially healthy women classified into four categories according to self reported baselin...