introduction: prostate specific antigen (psa) is one of the most sensitive markers for diagnosis of prostate cancer. immunoradiometric kit (irma) is a common and sensitive method for determination of psa in clinical laboratories. this kit has four major components: solid phase coated with monocolonal antibody, pair antibody labelled with i-125, series of standards in different ranges of concent...

this paper presents an approach for solving a nonlinear stochastic differential equations (nsdes) using a new basis functions (nbfs). these functions and their operational matrices areused for representing matrix form of the nbfs. with using this method in combination with the collocation method, the nsdes are reduced a stochastic nonlinear system of equations and unknowns. then, the error anal...