全文获取类型
| 收费全文 | 738篇 |
| 免费 | 32篇 |
| 国内免费 | 10篇 |
专业分类
| 测绘学 | 12篇 |
| 大气科学 | 17篇 |
| 地球物理 | 225篇 |
| 地质学 | 356篇 |
| 海洋学 | 46篇 |
| 天文学 | 94篇 |
| 综合类 | 6篇 |
| 自然地理 | 24篇 |
出版年
| 2024年 | 1篇 |
| 2023年 | 2篇 |
| 2022年 | 13篇 |
| 2021年 | 11篇 |
| 2020年 | 6篇 |
| 2019年 | 11篇 |
| 2018年 | 50篇 |
| 2017年 | 35篇 |
| 2016年 | 52篇 |
| 2015年 | 31篇 |
| 2014年 | 48篇 |
| 2013年 | 51篇 |
| 2012年 | 43篇 |
| 2011年 | 53篇 |
| 2010年 | 50篇 |
| 2009年 | 49篇 |
| 2008年 | 25篇 |
| 2007年 | 21篇 |
| 2006年 | 23篇 |
| 2005年 | 10篇 |
| 2004年 | 23篇 |
| 2003年 | 19篇 |
| 2002年 | 23篇 |
| 2001年 | 25篇 |
| 2000年 | 13篇 |
| 1999年 | 6篇 |
| 1998年 | 7篇 |
| 1997年 | 12篇 |
| 1996年 | 10篇 |
| 1995年 | 4篇 |
| 1994年 | 1篇 |
| 1993年 | 3篇 |
| 1992年 | 4篇 |
| 1991年 | 1篇 |
| 1990年 | 2篇 |
| 1989年 | 5篇 |
| 1988年 | 1篇 |
| 1987年 | 5篇 |
| 1986年 | 1篇 |
| 1985年 | 4篇 |
| 1984年 | 6篇 |
| 1983年 | 4篇 |
| 1982年 | 6篇 |
| 1981年 | 3篇 |
| 1980年 | 1篇 |
| 1979年 | 2篇 |
| 1978年 | 2篇 |
| 1976年 | 1篇 |
| 1973年 | 1篇 |
排序方式： 共有780条查询结果，搜索用时 15 毫秒
21.
Complete Tertiary exhumation history of the Menderes massif, western Turkey: an alternative working hypothesis 总被引：1，自引：0，他引：1
The main exhumation of the Menderes massif, western Turkey, occurred along an originally N‐dipping Datça–Kale main breakaway fault that controlled depositions in the Kale and the Gökova basins during the Oligocene – Early Miocene interval. The isostatically controlled upward bending of the main breakaway fault brings the lower plate rocks to the surface. In the Early Miocene, E–W‐trending N‐ and S‐dipping graben‐bounding faults fragmented the exhumed, dome‐shaped massif. The development of half grabens by rolling master fault hinges has allowed further exhumation of the central Menderes massif. After the Pliocene, high‐angle normal faults cut all of the previous structures. This model suggests that the Menderes massif is a single large metamorphic core complex that has experienced a two‐stage exhumation process. 相似文献
22.
23.
24.
Eser Deniz Oğuz-Kırca 《GeoJournal》2016,81(1):55-75
In this paper, the water distribution system at the Upper city of a well-preserved medieval town of Hasankeyf near the Tigris is questioned and its relation to the urban settlement pattern is assessed. The discussions are based on the cistern-intensive and available canal data collected within the residential borders of the Upper city in 2005. Being the third level features of the water system, the cisterns the majority of which are now attributable to the “conical, small and individual” typology, have shown that they were actively operated through the open rock-cut canals which were fed by the backbone of the distribution network—namely the siphon system, until recent times. Although a considerable number of converted cisterns hallmark shifts in the function of the water system and the changing conjectures over time, the blue prints of such a big “hydro-design” reveal the competence of semi-arid occupational environments in Upper Mesopotamia in showing how to cope with the topographical constraints and climatic disadvantages and turn these into an opportunity through the efficient use of terrain along with a carefully designed settlement area. That the Upper city now offers numerous water features makes this piece of land quite a representative of the regional works and shows the apex of the perception of ancient technology achieved with the siphon that could have been launched in the Roman era, and the state of art of planning ancient natural and man-made habitats. 相似文献
25.
26.
通过对江苏省南京市江宁区杨库村铜矿的地质背景、矿床地质特征、围岩蚀变及矿床成因、成矿控矿条件的分析研究,并与相邻已知矿区进行对比,结合近几年的工作成果,阐述了杨库村铜矿的找矿前景。 相似文献
27.
28.
29.
30.