A direct conversion method of thermodynamic partial derivatives—a simple and convenient method is put forward ,which expresses thermodynamic partial derivatives determined hardly with physical measures determined easily.

Analyzed the disadvantage of the prediction method by straight way analogy which is widely used to predict the mass of wind erosion in railway engineering, a new prediction method by contrast of influence factors is put forward, which is in point for wind erosion in railway engineering, and it is proved to have better applicability and prediction precision by calculating example.

Fuzzy cluster includes these algorithms,such as the transmitting closure,dynamic direct cluster,and maximum tree,and the operation times of dynamic direct cluster algorithm is the least.