Matlab 6.1 ( sofeware ) is used to calculate the weigh that make calculation easy and accurate.

在计算中采用Matlab6.1软件使计算简单、明确.

Based on the previous researches, enhanced mathematic model is built to make calculation easier.

在前人研究的基础上，改进生态位适宜度的数学模型，使计算更加简便。