1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1\\\\r\\\\n 1.1 Research Background and Significance . . . . . . . . . . . . . . . . . . . . . . . . 1\\\\r\\\\n 1.2 Current Research Status at Home and Abroad . . . . . . . . . . . . . . . . . . . 3\\\\r\\\\n 1.2.1 Current Research Status of Resource Utilization \\\\…