Subject
traffic
87
automobile
65
electric vehicle
58
electromobility
41
vehicle
33
fuel cell
29
statistical aspect
22
road traffic
20
automotive fuel
19
hydrogen fuel
14
mobility
13
battery
12
internal combustion engine
11
electric battery
10
fuel
10
future aspect
10
methanol
8
transport
8
direct methanol fuel cell ( DMFC )
7
energy conversion
7
hydrogen
7
sustainability
7
energy storage
6
hybrid system
6
emission
5
hydrogen engine
5
hydrogen transport
5
plastics
5
polymer electrolyte membrane fuel cell ( PEMFC )
5
railway
5
Diesel engine
4
Engineering
4
educational matter
4
electric machine
4
electrochemical engineering
4
energy consumption
4
energy system
4
equipment
4
fuel substitution
4
modeling
4
natural gas
4
advanced materials
3
air pollution
3
energy carrier
3
energy demand
3
ethanol
3
hydrogen production
3
hydrogen storage
3
planning
3
propulsion
3
more ...