پديد آورنده :
علي حسيني، فرشته
عنوان :
برآورد پارامترهاي توزيع وايبل و بررسي توزيع وايبل تعميم يافته
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
﴿آمار اقتصادي- اجتماعي﴾
محل تحصيل :
اصفهان،دانشگاه صنعتي اصفهان، دانشكده علوم رياضي
صفحه شمار :
يازده،137،[II]ص.: مصور،جدول،شكل،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
علي زينل همداني، مجيد اسدي
توصيفگر ها :
قابليت اطمينان , توزيع نمايي،وايبل،گاما،گامبل،لگ نرمال , مدل آويخته،ريسك رقابتي،ضربي،مقطع , روش حداكثر درستنمايي،گشتاوري،گرافيكي , بوت استرپ , ْآزمون نيكويي برازش
استاد داور :
ايرج كاظمي، حميد قرباني
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Abstract Weibull distribution is one of the most commonly used lifetime distribution Its hazardrate is a flexible one in modeling failure time data in the sense that it can be increasing constant or decreasing Many authors have studied its characteristics and have proposedpowerful and widely used estimator of its parameters In general theses estimatorsassume that the sample size is large and or the observations include no outlier However real reliability data often contradict these assumptions In this thesis we usethe bootstrap method for estimation of parameters of weibull distribution with twoparameters in the presence of outlier On the other hand models with bathtub shaped failure rate function are useful inreliability analysis The traditional weibull distribution is unable to model the complete lifetime of systemswith bathtub shaped failure rate function In this thesis also a new model which is usefulfor modeling this type of failure rate is presented and parameter estimation methods arestudied for the model Finally a real data from steel company is used to fit the weibull distribution and based onthe data we have estimated the parameters of the model and made some comparisonsbetween the estimator
استاد راهنما :
علي زينل همداني، مجيد اسدي
استاد داور :
ايرج كاظمي، حميد قرباني
