褐飞虱种群模型的参数估计

Parameter Estimate of Brown Planthopper Populations Model

褐飞虱是水稻生长过程中的重要害虫,近些年来对水稻产量的影响逐年加重。对组建褐飞虱两参数威布尔模型,利用最小二乘法和极大似然来进行参数估计以及提出两参数威布尔分布中参数的极大似然估计量的一种简单有效的迭代求解方法,将有利于理解和预测褐飞虱的种群动态。

Brown planthopper was a serious pest of rice crops,which resulted in field loss increasing year by year.Two parameter Weibull model was set up.The parameters are estimated by using the least square method and A iterative method for the maximum likelihood estimate of the two parameters in the two parameter Weibull distribu-tion is presented ,which is simple and efficient.It was useful to understand and to predict the population dynamics.