This method has not only solved the problem of the multiple synteny, but also can simplify models greatly. make the relation between the variables of the model clearer.

• 而本文在解决多重共线性的问题上采用了偏最小二乘法的主成分回归,该方法不仅解决了多重共线性的问题,还可大大简化模型,使模型变量之间的关系更清晰。