【目的】建立天敌胁迫下食饵种群动态模型的参数估计方法。【方法】利用灰色系统理论和灰色建模思想及差分等数学方法,对动态模型中的参数进行了估计。【结果】通过数学方法建立了动态模型参数的灰色估计法公式,解决了天敌肋迫下食饵种群动态模型的参数估计问题。【结论】通过对4个小麦品种蚜虫资料实例的参数估计,表明所建议的灰色参数估计法是有效的。
[Objective] The paper gave the way to estimate parameter of the prey population dynamical model under natural enemy. [Method] Grey theory and modeling idea or difference were taken to estimate parameter for dynamic model. [Result] With mathematical analysis, a grey estimate formula was built for parameter of dynamic model, and solution to parameter estimation for prey population intimated by natural enemy was given. [Conclusion] This parameter estimation for aphid of four characters shows that grey estimation given in this paper is valid.