In this paper, we studied the numerical solution of nonlinear weakly singular Volterra-Fredholm integral equations by using the product integration method. Also, we shall study the convergence behavior of a fully discrete version of a product integration method for numerical solution of the nonlinear Volterra-Fredholm integral equations. The reliability and efficiency of the proposed scheme are...

this research aimed to investigate the effect of brand vision and positioning on brand equity with regard to moderating role of product performance and using descriptive survey research. the population of research was marketing experts of superior brands in iran’s food industry, which chosen 148 sample of those population using stratified sampling method. data collection tool was a questionnair...

difference in color is a major source of distinction between the lubricants extracted directly from the lubecuts and those manufactured in the reclaim units.the mentioned difference can be regarded as one of the main problesm for these products.in order to imporve the color quality of final product, possible modifications  in the reclamation method have been investigated. th effort has been des...