approximate maximum likelihood estimate and inverse monent estimates of the parameters of the tampered failure rate model for the weibull distribution in a step-stress accelerated life test 總定數(shù)先定時截尾情況下簡單步進(jìn)應(yīng)力加速壽命試驗的優(yōu)化設(shè)計
The main results are listed as follows : ( l ) we present the inverse moment estimations and approximate maximum likelihood estimations of parameters, and then we examine the accuracy of the amle, mle and interval estimations . moreover we derive the method to get interval estimation of the shape parameter 主要結(jié)果如下:(1)給出了參數(shù)的近似極大似然估計(amle)和逆矩估計,比較了amle、mle和逆矩估計的精度,另外給出了求形狀參數(shù)區(qū)間估計的方法。
In order to put attributed scattering center " into sar atr use, the method of attributed scattering center extraction is studied in chapter 3 . and the rd ( region decoupled )-aml ( approximate maximum likelihood )-clean method is presented for extracting attributed scattering center from sar image, it can extract scattering center from sar image quickly and automatically 為了將屬性散射中心特征用于sar目標(biāo)分類,第三章研究了sar圖像目標(biāo)屬性散射中心特征提取方法,提出了rd-aml-cleansar圖像目標(biāo)屬性散射中心特征提取方法,該方法可由輸入sar圖像快速、自動地提取目標(biāo)的屬性散射中心特征。
We also obtain the bayes estimators of the burr type ii distribution parameter, and we give a simple approximation . 3 . we obtain a kind of approximation of the likelihood function, and we show that the approximation is equivalent to the exact one when the sample size is large . based on this approximation, we obtain the approximate maximum likelihood estimation of parameters of logistic distribution 在多重型刪失數(shù)據(jù)場合,討論了logistic分布參數(shù)的近似極大似然估計,對得到的近似似然函數(shù),在大樣本場合,證明了它以概率1收斂于原似然函數(shù),基于此近似似然函數(shù)獲得了logistic分布參數(shù)的近似極大似然估計。