Class information for:
Level 1: HYDROGEN ECONOMY//INTERNATIONAL JOURNAL OF HYDROGEN ENERGY//ELECTROLYSER

Basic class information
Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
21 4 THERMODYNAMICS//MECHANICS//ENGINEERING, MECHANICAL 471779
107 3       ENERGY & FUELS//ENERGY AND BUILDINGS//SOLAR ENERGY 73650
1954 2             THERMOCHEMICAL CYCLE//CHEMICAL HEAT PUMP//INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 6094
8509 1                   HYDROGEN ECONOMY//INTERNATIONAL JOURNAL OF HYDROGEN ENERGY//ELECTROLYSER 1277

Terms with highest relevance score


rank Category termType chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 HYDROGEN ECONOMY authKW 780007 6% 44% 72
2 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY journal 589273 56% 3% 715
3 ELECTROLYSER authKW 411974 3% 45% 37
4 HYDROGEN INFRASTRUCTURE authKW 370707 2% 58% 26
5 ELECTROLYZER authKW 362577 4% 32% 46
6 PEM ELECTROLYSER authKW 201531 1% 58% 14
7 POWER TO GAS authKW 184227 2% 27% 28
8 HYDROGEN SUPPLY CHAIN authKW 176271 1% 71% 10
9 UNDERGROUND HYDROGEN STORAGE authKW 175491 1% 89% 8
10 SOLAR HYDROGEN SYSTEM authKW 172751 1% 100% 7

Web of Science journal categories


chi_square_rank Category chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 Energy & Fuels 89620 85% 0% 1088
2 Electrochemistry 66491 61% 0% 781
3 Chemistry, Physical 11031 61% 0% 777
4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY 3631 7% 0% 93
5 Thermodynamics 619 6% 0% 79
6 Environmental Studies 317 3% 0% 40
7 Engineering, Chemical 153 6% 0% 77
8 Environmental Sciences 76 6% 0% 73
9 Engineering, Environmental 56 2% 0% 29
10 Engineering, Petroleum 46 1% 0% 9

Address terms


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 SYST ANAL UNIT 66620 1% 30% 9
2 RECH GEORGES PERI 49357 0% 100% 2
3 RENEWABLE ENERGY AREA 49357 0% 100% 2
4 I TESE 42298 0% 29% 6
5 CHEM PL ENGN 38554 0% 31% 5
6 GRP ENERGY SUSTAINABLE DEV 35891 0% 36% 4
7 COMPAGNIE EUROPEENNE TECHNOL HYDROGENE 32904 0% 67% 2
8 EXPERTISE SYST 32904 0% 67% 2
9 UCL SUSTAINABLE OURCES 30368 0% 31% 4
10 SYST ANAL TECHNOL EVALUAT IEK STE 27760 0% 38% 3

Journals


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 589273 56% 3% 715
2 RENEWABLE ENERGY 6019 4% 1% 46
3 ENERGY 3263 3% 0% 40
4 RENEWABLE & SUSTAINABLE ENERGY REVIEWS 3022 2% 0% 30
5 JOURNAL OF POWER SOURCES 2754 4% 0% 52
6 ENERGY CONVERSION AND MANAGEMENT 2228 2% 0% 30
7 INTERNATIONAL JOURNAL OF ENERGY RESEARCH 2190 1% 1% 17
8 ENERGY POLICY 2007 2% 0% 28
9 SOLAR ENERGY 1928 2% 0% 24
10 APPLIED ENERGY 1389 2% 0% 24

Author Key Words


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass LCSH search Wikipedia search
1 HYDROGEN ECONOMY 780007 6% 44% 72 Search HYDROGEN+ECONOMY Search HYDROGEN+ECONOMY
2 ELECTROLYSER 411974 3% 45% 37 Search ELECTROLYSER Search ELECTROLYSER
3 HYDROGEN INFRASTRUCTURE 370707 2% 58% 26 Search HYDROGEN+INFRASTRUCTURE Search HYDROGEN+INFRASTRUCTURE
4 ELECTROLYZER 362577 4% 32% 46 Search ELECTROLYZER Search ELECTROLYZER
5 PEM ELECTROLYSER 201531 1% 58% 14 Search PEM+ELECTROLYSER Search PEM+ELECTROLYSER
6 POWER TO GAS 184227 2% 27% 28 Search POWER+TO+GAS Search POWER+TO+GAS
7 HYDROGEN SUPPLY CHAIN 176271 1% 71% 10 Search HYDROGEN+SUPPLY+CHAIN Search HYDROGEN+SUPPLY+CHAIN
8 UNDERGROUND HYDROGEN STORAGE 175491 1% 89% 8 Search UNDERGROUND+HYDROGEN+STORAGE Search UNDERGROUND+HYDROGEN+STORAGE
9 SOLAR HYDROGEN SYSTEM 172751 1% 100% 7 Search SOLAR+HYDROGEN+SYSTEM Search SOLAR+HYDROGEN+SYSTEM
10 RENEWABLE HYDROGEN 165843 1% 40% 17 Search RENEWABLE+HYDROGEN Search RENEWABLE+HYDROGEN

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.

Classes with closest relation at Level 1


rank cluster_id2 link
1 5869 HYBRID ENERGY SYSTEM//HYBRID RENEWABLE ENERGY SYSTEM//DIESEL GENERATOR
2 13524 SULFUR IODINE CYCLE//THERMOCHEMICAL HYDROGEN PRODUCTION//IS PROCESS
3 16874 SOLID OXIDE ELECTROLYSIS CELL//SOEC//HIGH TEMPERATURE ELECTROLYSIS
4 28415 FAST FILLING//FAST FILLING PROCESS//CRYO ADSORPTION
5 34906 AF 447//ANNULAR BUBBLE//BREAKDOWN IN A VAPOR GAS MEDIUM
6 3553 ELECTRIC VEHICLES//ALTERNATIVE FUEL VEHICLES//BATTERY ELECTRIC VEHICLE
7 6507 HYDROGEN EVOLUTION REACTION//ALKALINE WATER ELECTROLYSIS//HYDROGEN EVOLUTION
8 4386 IRIDIUM OXIDE//WATER ELECTROLYSIS//IRO2
9 13516 COMPRESSED AIR ENERGY STORAGE//COMPRESSED AIR ENERGY STORAGE CAES//CAES
10 18142 HYDROGEN SAFETY//JET FIRE//HYDROGEN DISPERSION

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