- Transportation 14
- Computational Intelligence 8
- Renewable and Green Energy 8
- Energy Policy, Economics and Management 7
- Energy Systems 7
- Power Electronics, Electrical Machines and Networks 7
- Transportation Technology and Traffic Engineering 4
- Communications Engineering, Networks 3
- Control, Robotics, Mechatronics 3
- Energy Efficiency 3
- Robotics and Automation 3
- Sustainable Architecture/Green Buildings 3
- Sustainable Development 3