The measuring system of magnetic substance based on fuzzy theory built the fuzzy model,realized calibration based on fuzzy online and filter by software.

Basic characteristics of magnetic field and magnetic fluid of aluminum reduction cells,design of magnetic field balance,feature of magnetic fluid dynamic changes,effects of ferromagnetic substances and effect of magnetic field on reeduction process are discussed.

A method of mcasuring the Curie temperature of ferromagnetic substance by oscilloscope is presented in this paper, showing vividly that the magnetic of ferromagnetic substance varies with temperature.

Exact diagonalization solution and coherent state variational method of the coupling system of carrier and ferromagnetic material;

Discussion on the production of bound magnetic polaron in ferromagnetic material with impurity potential;