Classification
EVP - Energy models, energy system analysis
109
EXA - Energy policy
9
EVN - Energy supply - future aspects
8
EBA - Energy production, energy technology
6
ETC - Energy conversion
6
EHA - Renewable energy sources
5
ETF - Fuel cells - general
5
EVA - Energy demand, energy supply - comprehensive works
4
TED - Electric power - industrial aspect
4
CWE - Chemical engineering, chemical industry - general
3
EUD - Energy consumption
3
EWA - Energy economy
3
GDA - Engineering geology - general
3
TEDD - Electric power transmission
3
TIE - Process engineering
3
UKH - Environment and power plants, industrial plants
3
CLE - Combustion, flames, explosions
2
CXM - Coal combustion
2
EAD - Energy - comprehensive works
2
EUA - Energy conservation - general
2
TIG - Reliability, safety, quality control
2
TKJ - Traffic
2
UAN - Environment - mathematical methods, computer applications
2
UCA - Environmental problems, man and environment - general aspects
2
UHCH - Urban areas
2
CNO - Electrolytes
1
DWAC - Relational database systems
1
DYA - Artificial intelligence
1
EIC - Solar thermal energy conversion
1
ENA - Energy from biomass and waste
1
EPK - Nuclear energy
1
ETA - Energy storage
1
ETFD - Solid oxide fuel cells ( SOFC )
1
ETFP - Fuel cell construction and modeling
1
EUU - Cogeneration
1
EVH - Energy supply - economic growth
1
MNLB - Computational methods in physics
1
MSF - Mathematical methods in engineering
1
MWF - Programming, optimization, control theory
1
TKB - Civil engineering - buildings
1
UEF - Sustainability
1
UEN - Environmental economy
1
UKE - Environment and energy resources
1
UKL - Environment and nuclear power
1