Studies the optimal inventory replenishing policy for items with Weibull distribution in random demand under conditions that the distributor delivers goods to retailers at fixed intervals and the demand of retailers within unit time presents uniform distribution.

篊ement is o ne of the most important material in project construction，Afterstudying the law of variable demand of fixed lifetime materials such as cement，we promptan optimal ordering policy model.

This paper presents a VMI replenishment policy based on inventory to sales ratio.

Optimizing cycle service level and replenishment policy based on cost sharing of sales surplus is analyzed in supply chain.

By solving the model,an optimized replenishment policy to the supply-hub for each group of suppliers was obtained.

From the retailers\' viewpoint,this paper proposes the optimal replenishment decisions based on literatures existed when the replenishment rate is finite under permissible delay in payments linked to ordering quantity.

Under the conditions of finite replenishment rate,the paper proposes optimal replenishment decisions for the retailer according to the credit period of time offered by the supplier,and establishes a total cost mathematical model for the retailer.

Study on mine fire comprehensive prevention of genetic algorithms optimal strategy;

Realization of optimal strategy for power system low-frequency and low-voltage load reduction;

Aim at the countermeasure between missiles and targets in space,the space simulation model based on differential games for SAM was established and its optimal strategy of resistance was deduced Moreover the adaptive critic neural networks arithmetic method was presented and used to calculated the simulation model.