根据周期性地使用杀虫药的策略思想 ,把不定期的多次使用杀虫药的多元动态规划问题 ,转化为周期性地使用杀虫药的二元非线性规划问题 ,从而使模型得到简化 ,并使得模型求解通过计算机程序直接实现 ,为确保农作物获得最大收益给出了切实可行的多次用药方案 . According to the tactics of periodically using insecticide, the problem of multivariate dynamic programming with occasional repeated use of insecticides is transformed into the problem of bivariate nonlinear programming that uses pesticides periodically, so that the model is simplified , And makes the model to be solved directly through the computer program to give a practical multi-drug program to ensure the maximum benefits of crops.