Research Article
A New Method for Identifying Key and Common Themes Based on Text Mining: An Example in the Field of Urban Expansion
Table 1
Keywords and theme naming.
| No. | KW1 | KW2 | KW3 | KW4 | KW5 | ID |
| 1 | expansion | urban | china | urbanization | city | urban expansion | 2 | growth | urban | spatial | pattern | model | spatial pattern | 3 | city | growth | urban | infrastructure | state | urban infrastructure | 4 | urban | plan | planning | growth | management | urban planning management | 5 | urban | scenario | future | growth | prediction | scenario prediction | 6 | land | change | agricultural | development | urban | agricultural land change | 7 | sprawl | urban | measure | study | index | urban sprawl | 8 | urban | study | remote | city | datum | remote | 9 | population | city | density | large | high | population density | 10 | metropolitan | region | urban | period | paper | metropolitan region | 11 | development | spatial | urban | pattern | economic | economic development | 12 | factor | urban | distance | variable | datum | distance variable | 13 | policy | development | housing | effect | local | housing development policy | 14 | public | social | cost | population | economic | social cost | 15 | urban | level | regional | agglomeration | beijing | urban agglomeration | 16 | space | development | green | indicator | paper | green space | 17 | datum | surface | image | change | map | surface change | 18 | urban | dynamic | analysis | coastal | result | coastal urban | 19 | transportation | effect | transport | emission | center | transportation emission | 20 | model | simulation | simulate | cellular | automaton | cellular automata model | 21 | change | increase | climate | effect | result | climate change | 22 | associate | health | form | location | physical | physical health | 23 | forest | increase | zone | urbanization | loss | forest loss | 24 | landscape | pattern | metric | soil | patch | landscape pattern | 25 | risk | flood | level | present | environment | flood risk | 26 | increase | effect | temperature | decrease | degree | temperature | 27 | urban | global | carbon | time | project | urban carbon | 28 | ecosystem | natural | service | loss | river | ecosystem service | 29 | water | impact | quality | environmental | concentration | water quality |
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