In this research, the analysis of ramming factor, wall thickness, and quantity additives powder have been considered on permeability mould which is used to make flange coupling cast. The data has collected from sand making industry using L27 orthogonal array. It was revealed that maximum obtained lowest thin minimum mixing additives. number increased significantly proper allowability gas cavity...

the purpose of this study is estimation of daily value at risk (var) for total index of tehran stock exchange using parametric, nonparametric and semi-parametric approaches. conditional and unconditional coverage backtesting are used for evaluating the accuracy of calculated var and also to compare the performance of mentioned approaches. in most cases, based on backtesting statistics results, ...

This paper gives a detailed overview of the problem of missing data in parametric and nonparametric regression. Theoretical basics, properties as well as simulation results may help the reader to get familiar with the common problem of incomplete data sets. Of course, not all occurences can be discussed so this paper could be seen as an introduction to missing data within regression analysis an...

Recent research on human intelligence [1] suggests that the auditory system has a hierarchical structure, in which the lower levels store individual properties, and the upper levels store the group properties of utterances. However, most of the conventional automatic recognizers adopt a single level model structure. In structure-based models, such as HMM and parametric trajectory models, only t...

Parametric prediction error methods constitute a classical approach to the identification of linear dynamic systems with excellent large-sample properties. A more recent regularized approach, inspired by machine learning and Bayesian methods, has also gained attention. Methods based on this approach estimate the system impulse response with excellent small-sample properties. In several applicat...