水土保持统计模型问题探讨——内生变量取对数建模的弊端

Analysis on statistical model of the soil and water conservation——disadvantage of logarithmic model

在水土保持研究中 ,常采用对数模型来描述各因素间的关系 ,这种模型往往具有较好的统计特性。我们在建模过程中发现这种“好”模型并不一定得出好的计算结果。对此 ,本文分析了其内在原因 ,发现对数模型具有放大或缩小误差的特性 。

To study the soil and water conservation, we usually use the logarithmic model to describe the relations between factors. It often gives good statistical characteristics. In the process of modeling we find that this “good” model can not make sure to good result. In this paer we hold an inquiry into the intrinsic reasons. It shows that logarithmic model has the property of enlarging or reducing model errors and points out the disadvantages of logarithmic model.