In this paper we consider impulse control of continuous time Markov processes with average cost per unit functional. This problem is approximated using problems stopped at the first exit from an increasing sequence open sets. We find a solution to Bellman equation corresponding original and show that approximate optimal value

in order to simplify the pronunciation ofthe adult's words,children use phonological processes inthe initial years oftheir speech growth.the present study aims at considering phonological processes ina group oftwo tofour-year old farsi speaking children.the results indicate that itisnot possible to correctly and precisely account forthe occurrences ofsuch processes in children’s pronunciat...