نتایج جستجو برای: use failure rate
تعداد نتایج: 2804313 فیلتر نتایج به سال:
This paper develops a new method, named E-Bayesian estimation, to estimate reliability parameter. In the paper, the E-Bayesian estimation method of failure rate is derived for testing data from products with exponential distribution. Relations between E-Bayesian estimation and hierarchical Bayesian estimation are discussed. Finally, the new method is applied to a real testing data set, and as c...
We present a method to assess the reliability of a material operating in a dynamic environment. The dynamic environment is represented as a sequence of shocks governed by a self-exciting point process. Different distribution models for the time-to-failure of the material are suggested. The case of a piecewise exponential model where a Cox’s model is integrated to take into account the effect of...
A combination of exponential and half logistic failure rate model for reliability studies is paid much attention. An attempt is made to present the distributional properties, estimation of parameters , testing of hypothesis and the power of likelihood ratio criterion about the proposed model .
In this paper, we introduce a new Bathtub shaped failure rate model named as x-Exponantial Model and present a comparative study with Generalized Lindley, Generalized Gamma and Exponentiated Weibull distributions.
To increase reliability and fault tolerance in wireless sensor network, using spare nodes is a useful method. In this article, we survey the influence of using single-type and multi-type spare nodes on the fault tolerance in the low density. To achieve this, we use single-type and multi-type spare nodes and construct the network reliability graph for one, two and three-node densities. Then, we ...
Product units in service may be discarded even before they have failed. This paper discusses the need to consider such discarded units in analyzing eld failure data. Approaches based on maximum likelihood (ML) and conventional cumulative hazard (CH) methods are described and evaluated for their accuracy in estimating the parameters of failure time distributions. Simulation results showed that t...
The properties of x-Exponantial Bathtub shaped failure rate model are discussed. Estimation process and failure rate behavior is explained.
the study of air infiltration into the buildings is important from several perspectives that may be noted to energy and design of hvac systems, indoor air quality and thermal comfort and design of smoke control systems. given the importance of this issue, an experimental and numerical study of air infiltration through conventional doors and windows has been explored in iran. to this end, at fir...
The main idea of this paper is to study the dependence between the probability of default and the recovery rate on credit portfolio and to seek empirically this relationship. We examine the dependence between PD and RR by theoretical approach. For the empirically methodology, we use the bootstrapped quantile regression and the simultaneous quantile regression. These methods allow to determinate...
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