Occupational and environmental hygiene

oncopathology

Operation and Management of Rail Transit System

Operational Research and cybernetics (Linear and nonlinear Optimization, nonlinear Control Theory and Application, complex system Theory and Application, Optimization method)

Optical fiber communication and sensing technology and system

Optical fiber communication and sensing technology and system

Optical medical beauty

optics

Optoelectronic functional Molecular Materials and Devices

Organization and human resource management

Organization and human resources management

Orthopedic rehabilitation

orthopedics

overall design of aircraft