There is a vast amount of work on high-dimensional regression. The common starting point for the existing theoretical to assume data generating model homoscedastic linear regression with some sparsity structure. In reality homoscedasticity assumption often violated, and hence understanding heteroscedasticity critical importance. this article we systematically study estimation heteroscedastic mo...

Due to construction costs and operational issues have been in this study discuss how strengthen the concrete columns. The results of previous studies on some structures earthquake-prone weakness reinforced inside steel casings surrounding columns is a modern technique used many countries today for rectangular circular concrete. advantages method convenient, economical easy. Reference model colu...

Application of logistic regression modeling techniques without subsequent performance analysis regarding predictive ability of the fitted model can result in poorly fitting results that inaccurately predict outcomes on new subjects. Model validation is possibly the most important step in the model building sequence. Model validity refers to the stability and reasonableness of the logistic regre...