全文获取类型
收费全文 | 286篇 |
免费 | 52篇 |
国内免费 | 360篇 |
专业分类
测绘学 | 8篇 |
大气科学 | 107篇 |
地球物理 | 79篇 |
地质学 | 289篇 |
海洋学 | 78篇 |
天文学 | 10篇 |
综合类 | 84篇 |
自然地理 | 43篇 |
出版年
2024年 | 18篇 |
2023年 | 45篇 |
2022年 | 37篇 |
2021年 | 34篇 |
2020年 | 33篇 |
2019年 | 28篇 |
2018年 | 14篇 |
2017年 | 22篇 |
2016年 | 9篇 |
2015年 | 42篇 |
2014年 | 61篇 |
2013年 | 62篇 |
2012年 | 18篇 |
2011年 | 16篇 |
2010年 | 13篇 |
2009年 | 17篇 |
2008年 | 19篇 |
2007年 | 36篇 |
2006年 | 46篇 |
2005年 | 24篇 |
2004年 | 18篇 |
2003年 | 8篇 |
2002年 | 3篇 |
2001年 | 14篇 |
2000年 | 8篇 |
1999年 | 5篇 |
1998年 | 8篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 4篇 |
1992年 | 1篇 |
1991年 | 5篇 |
1990年 | 7篇 |
1989年 | 8篇 |
1988年 | 3篇 |
1987年 | 1篇 |
1986年 | 4篇 |
1985年 | 2篇 |
1982年 | 1篇 |
排序方式: 共有698条查询结果,搜索用时 15 毫秒
201.
Lei ZHOU Shihui HUANG Qing WANG Zhenhai LI Zongyang LI Anyou HE Jiehu CHEN Li LIU Keshu ZOU 《海洋湖沼学报(英文)》2022,(4):1640-1653
Cavefish can be important models for understanding the relationships among evolution, adaptation, and development in extreme environments. However, cavefish remain poorly studied, particularly at the genome level. Here, we sequenced the complete mitogenome of three cavefish in the family Nemacheilidae( Paranemachilus pingguoensis, Oreonectes polystigmus, and Heminoemacheilus longibarbatus), which were collected from karst caves in South China. The mitogenomes each contained 37 genes(13 protein c... 相似文献
202.
It is very important to understand the ecological and socio-economic factors in population distribution and their changes over time for the compilation of regional development planning and the guidance of rational population flow. Using surface-based population data for China from 1990 to 2015, the national distribution and dynamics of the human population by elevation are quantified based on 1-km cell-size gridded distribution datasets and 1-km cell-size DEM(digital elevation model). A geograph... 相似文献
203.
Weipeng ZHENG Yongqiang YU Yihua LUAN Shuwen ZHAO Bian HE Li DONG Mirong SONG Pengfei LIN Hailong LIU 《大气科学进展》2020,37(10):1034-1044
Two versions of the Chinese Academy of Sciences Flexible Global Ocean–Atmosphere–Land System model(CASFGOALS), version f3-L and g3, are used to simulate the two interglacial epochs of the mid-Holocene and the Last Interglacial in phase 4 of the Paleoclimate Modelling Intercomparison Project(PMIP4), which aims to study the impact of changes in orbital parameters on the Earth’s climate. Following the PMIP4 experimental protocols, four simulations for the mid-Holocene and two simulations for the La... 相似文献
204.
Yuyang GUO Yongqiang YU Pengfei LIN Hailong LIU Bian HE Qing BAO Bo AN Shuwen ZHAO Lijuan HUA 《大气科学进展》2020,37(10):1133-1148
This study documents simulated oceanic circulations and sea ice by the coupled climate system model FGOALS-f3-L developed at the State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics,Institute of Atmospheric Physics, Chinese Academy of Sciences, under historical forcing from phase 6 of the Coupled Model Intercomparison Project(CMIP6). FGOALS-f3-L reproduces the fundamental features of global oceanic circulations, such as sea surface temperature(SST), ... 相似文献
205.
Yuepeng PAN Mengna GU Yuexin HE Dianming WU Chunyan LIU Linlin SONG Shili TIAN Xuemei Lü Yang SUN Tao SONG Wendell W. WALTERS Xuejun LIU Nicholas A. MARTIN Qianqian ZHANG Yunting FANG Valerio FERRACCI Yuesi WANG 《大气科学进展》2020,37(9):933-938
<正>While China’s Air Pollution Prevention and Control Action Plan on particulate matter since 2013 has reduced sulfate significantly, aerosol ammonium nitrate remains high in East China. As the high nitrate abundances are strongly linked with ammonia, reducing ammonia emissions is becoming increasingly important to improve the air quality of China. Although satellite data provide evidence of substantial increases in atmospheric ammonia concentrations over major agricultural regions, long-t... 相似文献
206.
The goal of this research study is to describe academic issues which have been debated in the field of Chinese geosciences for a century. In 1922, Jonquei S. Lee(Li Siguang) discovered Quaternary glacial relics at Taihang Mountainin eastern China. In 1947, he published his research findings in the magazine Mount Lushan in Glacial Age. The research results had established three Ice Ages: Poyang(Gonzi), Dagu(Minde), and Lushan(Lisi). However, at that time, no Wurm glacial relics of the last Ice Ag... 相似文献
207.
YU Yang YE Qin ZHANG Kexin HE Weihong SONG Bowen XU Yadong KOU Xiaohu WANG Jiaxuan YANG Fengli 《《地质学报》英文版》2020,94(4):942-971
The Cryogenian is a critical period in the history of the Earth. It is marked by multiple extreme climate changes that caused alternating global glacial and interglacial intervals. These dramatically changed the sedimentary system, and metal ores and source rocks distributed widely during this period. Therefore, studying the Cryogenian stratigraphic framework and sedimentary basins is important to improve the stratigraphic resolution for metal mineral and hydrocarbon prospecting and exploration ... 相似文献
208.
ZHENG Hongwei LI Tingdong HE Rizheng YANG Hui NIU Xiao ZOU Changqiao 《《地质学报》英文版》2020,94(4):1159-1166
To better understand the lithosphere mantle collision tectonics between the India plate and Asia plate, we determine three dimensional P wave velocity structure beneath western Tibet using 27,439 arrival times from 2,174 teleseismic events recorded by 182 stations of Hi-CLIMB Project and 16 stations in the north of Hi-CLMB. Our tomographic images show the velocity structure significantly difference beneath northern and southern Qiangtang, which can further prove that the Longmu Co-Shuanghu ophio... 相似文献
209.
Research Agenda for Understanding Transboundary Ecosystem Changes and Eco-security in Southwestern China 总被引:1,自引:0,他引:1
LIU Jiang HE Daming 《山地科学学报》2006,3(1):81-90
Introduction One of the foremost challenges facing the world in the 21st century is maintaining global ecosystem diversity. This requires thorough understanding of ecosystem vulnerability and resilience. Economic globalization has forced nations to consid… 相似文献
210.