School of Materials Science and Engineering;
Henan University of Science and Technology;
Luoyang 471003;
Henan;
China;
School of Aerospace Engineering;
Zhengzhou University of Aeronautics;
Zhengzhou 450015;
Henan;
China;
National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials;
Henan University of Science and Technology;
Luoyang 471003;
Henan;
China;
Hardness prediction; Weighted fuzzy C-means algorithm; Feature selection; Particle swarm optimization; Support vector regression; Dispersion reduction;