مشخصات پژوهش

خانه /Wavelet threshold based on ...
عنوان
Wavelet threshold based on Stein's unbiased risk estimators of restricted location parameter in multivariate normal
نوع پژوهش مقالات در نشریات
کلیدواژه‌ها
Balance loss function; multivariate normal distribution; restricted estimator; shrinkage estimator; wavelet threshold
چکیده
In this paper, the problem of estimating the mean vector under nonnegative constraints on location vector of the multivariate normal distribution is investigated. The value of the wavelet threshold based on Stein’s unbiased risk estimators is calculated for the shrinkage estimator in restricted parameter space. We suppose that covariance matrix is unknown and we find the dominant class of shrinkage estimators under Balance loss function. The performance evaluation of the proposed class of estimators is checked through a simulation study by using risk and average mean square error values
پژوهشگران حمید کرمی کبیر (نفر اول)، محمود افشاری (نفر دوم)، فضل الله لک (نفر سوم)