Abstract:Model annealing is a Monte Carlo optimization process. It models the physical process of annealing and removes periodic skip that is caused by low S/N ratio and big static corrections,making the final solution similar to true one. But its application is limited because of long operation time and difficult temperature determination. In describing a residual static correction using model annealing method,we also detail the obtainment of posterior probability, automatic initial temperature decision by a formula for the posterior probability,automatic temperature control and threshold value conversion according to annealing principle. These measures may speed up convcrgenee and reduce iterations.