逻辑斯谛曲线

本文提出了逻辑斯谛曲线的参数K、r、a的一种数值估测方法。

A numerical method for estimating the parameters K , r , a of the Logistic curve is presented .

逻辑斯谛曲线上两个重要特征点的分析及其应用

The analysis and application of the two important characteristic points on logistic curve

逻辑斯谛曲线参数的一种数值估测方法

A Numerical Method for Estimating the Parameters of the Logistic Equation

地下水水质评价的逻辑斯谛曲线模型

Logistic curve model of groundwater quality evaluation

该模型一方面采用粒子群算法优化投影指标函数及逻辑斯谛曲线函数参数，确保了模型参数的准确性；

The model , on the one hand , uses the PSO to optimize the projection index function and the parameters of LCF so as to ensure the accuracy of the parameters used in the model .

为检验洪涝灾情等级标准的合理性，笔者利用逻辑斯谛曲线和遗传算法对其加以验证，并且在模型的级别判定上，做了适当的处理。

In order to test the grade criterions of flood disaster loss , Logistic Curve ( Log ) model and Genetic Algorithm ( GA ) are used by the author who properly disposes the judge of disaster loss grade .

根据逻辑斯谛曲线，北京的城市化水平从建国以来一直处于加速发展阶段，到1996年才进入城市化后期阶段，发展开始缓慢。

According to the logistic curve , Beijing urbanization stepped into anaphase after 1996 , before which it had been in the accelerating phase since 1949 . During these years the urbanization level of Beijing exceeds industrialization level all the time .