It is proved that an optimal stationarypolicy exists under the criterion of long-run average cost.
在平均费用准则下，证明了最优平稳策略的存在性。
2
Stable policy, different from stationarypolicy, is a policy avoiding the possible realizations exponentially increasing.
稳定策略不同于平稳策略，是避免可能的实现值成指数增加的策略。
3
Finally an iteration algorithm to find an optimal stationarypolicy is proposed, and an numerical example is provided to (illustrate) the application of the algorithm.