A critical path inventory policy is presented to solve a kind of stochastic economic order quantity(EOQ) model with limited F(fund).

The optimal inventory policy can be selected with the computer simulation technique.

The Storage Model under the Condition of Limited-space Storehouse was established, given the option storage strategy.

This paper mainly introduces the method of deciding on the first storage of log during the best period when it is sold at variable price in the cycle time and probes into the optimization of log stochastic storage policy by establishing the mathematical model of expected opportunity cost.

The first method is the new elitist method, which replaces the worst individuals with the recorded peaks between the selection and the crossover of the genetic algorithm.

A new elitist strategy in genetic algorithms.;

New input operator and delete operator are proposed,and elitist strategy is used.

The improvements of NGA are as following:the discriminating standard L for distances among individuals set as dynamic function to keep the diversity of colonies;the elitist strategy is adopted to ensure the convergence of the algorithm;the circling strategy of local extreme values is used as auxiliary termination principle to avoid falling into local optima.