주제어 |
specific hazardous substances
|
1
|
1
|
|
Railroad Industry Developme ...
|
2
|
1
|
|
Railroad Project
|
2
|
1
|
|
photochemical ozone creation ...
|
2
|
1
|
|
pocps
|
2
|
1
|
|
railroad industry
|
2
|
1
|
|
문화 경제적 가치
|
2
|
1
|
|
국가안보범죄
|
4
|
1
|
|
railroadvehicles
|
5
|
1
|
|
Metallic species
|
6
|
1
|
|
Pollution profile
|
6
|
1
|
|
Ionic species
|
7
|
1
|
|
축제성
|
11
|
1
|
|
PM10
|
21
|
1
|
|
시뮬라시옹
|
40
|
1
|
|
volatile organic compounds
|
54
|
1
|
|
Volatile organic compounds
|
61
|
1
|
|
wastewater
|
86
|
1
|
|
Factor analysis
|
186
|
2
|
|
vocs
|
183
|
2
|
|
Correlation analysis
|
135
|
1
|
|
국가안보
|
157
|
1
|
|
correlation analysis
|
197
|
1
|
|
heavy metals
|
200
|
1
|
|
놀이성
|
203
|
1
|
|
factor analysis
|
375
|
1
|
|
계 |
|
1,950 |
28 |
|
* 주제로 분류 되지 않은 논문건수 |
|
0 |
|