发文地区与机构
近年国家 / 地区发文量统计
| 国家 / 地区 | 发文量 |
|---|---|
| USA | 21 |
| CHINA MAINLAND | 4 |
| GERMANY (FED REP GER) | 3 |
| Brazil | 2 |
| Australia | 1 |
| Canada | 1 |
| Colombia | 1 |
| Czech Republic | 1 |
| Iceland | 1 |
| Pakistan | 1 |
近年机构发文量统计
| 机构 | 发文量 |
|---|---|
| NATIONAL AERONAUTICS & SPACE ADMINISTRA... | 4 |
| UNITED STATES DEPARTMENT OF THE INTERIO... | 4 |
| NEVADA SYSTEM OF HIGHER EDUCATION (NSHE... | 3 |
| CHINESE ACADEMY OF SCIENCES | 2 |
| UNITED STATES DEPARTMENT OF ENERGY (DOE... | 2 |
| UNITED STATES ENVIRONMENTAL PROTECTION ... | 2 |
| UNIVERSIDADE FEDERAL DE SANTA MARIA (UF... | 2 |
| UNIVERSITY OF CALIFORNIA SYSTEM | 2 |
| UNIVERSITY OF MICHIGAN SYSTEM | 2 |
| AGR UNIV ICELAND | 1 |