نتایج جستجو برای: hybrid hazard rate function

تعداد نتایج: 2268838  

Journal: :بین المللی مهندسی صنایع و مدیریت تولید 0
robab hatami m.sc. graduate, industrial engineering department, isfahan university of technology ali zeinal hamadani associate professor,industrial engineering department, isfahan university of technology hamid reza karshenas assistant professor, department of electrical and computer engineering, isfahan university of technology mohammad hosein rohani m.sc. graduate, isfahan regional electric company

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...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

during natural gas processing, water in natural gas may cause to hydrates formation in pipelines which may lead to serious damages to process equipments. given the problems raised by present of water in natural gas, glycol solvent uses to remove water.in contact of glycol with gas always an amount of btex and voc absorb along with water, which on glycol recovery process, these substances separa...

Journal: :Collected scientific works of Ukrainian State University of Railway Transport 2017

Hatami, Robab , Karshenas, Hamid Reza , Rohani, Mohammad Hosein , Zeinal Hamadani, Ali ,

  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 mo...

Journal: :علوم دامی ایران 0
محمود وطن خواه دانشیار مرکز تحقیقات کشاورزی و منابع طبیعی شهرکرد

data utilized in this study were 6800 records of lambs’ life longevity, and survival rate from 263 sires and 1839 dams collected from 1989 through 2009, from the lori-bakhtiari flock at shooli station in shahrekord. the data were analyzed, using linear and hazard ratio models along with weibul function. these models included such non genetic factors as year and month of birth, sex of lamb, type...

ژورنال: اندیشه آماری 2020
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The Kumaraswamy distribution is a two-parameter distribution on the interval (0,1) that is very similar to beta distribution. This distribution is applicable to many natural phenomena whose outcomes have lower and upper bounds, such as the proportion of people from society who consume certain products in a given interval.  In this paper, we introduce the family of Kumaraswamy-G distribution, an...

Journal: :journal of paramedical sciences 0
nezhat shakeri department of biostatistics, faculty of paramedical sciences, shahid beheshti university of medical sciences fatemeh eskandari prevention of metabolic diseases research center, research institute of endocrine sciences, shahid beheshti university of medical sciences farhad hajsheikholeslami prevention of metabolic diseases research center, research institute of endocrine sciences, shahid beheshti university of medical sciences arash ghanbarian prevention of metabolic diseases research center, research institute of endocrine sciences, shahid beheshti university of medical sciences fereidoun azizi research center of endocrine sciences, research institute of endocrine sciences, shahid beheshti university of medical sciences

abstract         in the increasing population of the elderly in iran, so far no prospective health studies have been undertaken.   this study was conducted to identify the risk factors of survival time of the elderly of ages above 60 years. material and methods: individuals above 60 years old were recruited in the primary phase of the tehran lipid and glucose study (tlgs) during 1998-2001. they...

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