全文获取类型
| 收费全文 | 1134篇 |
| 免费 | 17篇 |
| 国内免费 | 7篇 |
专业分类
| 测绘学 | 140篇 |
| 大气科学 | 60篇 |
| 地球物理 | 203篇 |
| 地质学 | 436篇 |
| 海洋学 | 47篇 |
| 天文学 | 227篇 |
| 综合类 | 14篇 |
| 自然地理 | 31篇 |
出版年
| 2022年 | 21篇 |
| 2021年 | 22篇 |
| 2020年 | 14篇 |
| 2019年 | 27篇 |
| 2018年 | 56篇 |
| 2017年 | 48篇 |
| 2016年 | 66篇 |
| 2015年 | 40篇 |
| 2014年 | 54篇 |
| 2013年 | 88篇 |
| 2012年 | 56篇 |
| 2011年 | 40篇 |
| 2010年 | 50篇 |
| 2009年 | 37篇 |
| 2008年 | 34篇 |
| 2007年 | 31篇 |
| 2006年 | 25篇 |
| 2005年 | 19篇 |
| 2004年 | 20篇 |
| 2003年 | 10篇 |
| 2002年 | 6篇 |
| 2001年 | 14篇 |
| 2000年 | 27篇 |
| 1999年 | 14篇 |
| 1998年 | 14篇 |
| 1996年 | 12篇 |
| 1995年 | 8篇 |
| 1994年 | 9篇 |
| 1993年 | 15篇 |
| 1992年 | 16篇 |
| 1991年 | 31篇 |
| 1990年 | 13篇 |
| 1989年 | 12篇 |
| 1988年 | 16篇 |
| 1987年 | 20篇 |
| 1986年 | 14篇 |
| 1985年 | 9篇 |
| 1984年 | 9篇 |
| 1983年 | 19篇 |
| 1982年 | 9篇 |
| 1981年 | 9篇 |
| 1980年 | 12篇 |
| 1979年 | 13篇 |
| 1978年 | 8篇 |
| 1976年 | 11篇 |
| 1974年 | 8篇 |
| 1973年 | 6篇 |
| 1972年 | 7篇 |
| 1969年 | 5篇 |
| 1966年 | 6篇 |
排序方式： 共有1158条查询结果，搜索用时 15 毫秒
21.
A. Chakraborty H. C. Upadhyaya O. P. Sharma S. K. Deb 《Meteorology and Atmospheric Physics》2003,83(3-4):221-236
Summary ?A newly developed ocean general circulation model has been tested and verified with some idealized experiments. Generally
two types of idealized experiments have been done here. First types are called as “symmetric experiments” and second types
are called as “transport experiments”. The first types of experiment help to correct the model core and any deficiency from
boundary conditions. The second types of experiment are the type of validation experiment. In both the experiments there are
no continents, so in the first type of experiments where symmetric forcings are provided one can expect that model should
maintain the symmetric nature. In the second type of experiments one can expect that model should respond correctly to the
wind forcings, if no wind curl is present in the wind forcing there will be no circulation in the extratropics and if there
is no wind the equator there will be no circulation. The model reproduces the possible envisaged results of these experiments
and gives the confidence for performing the realistic integration.
Received February 20, 2002; accepted July 7, 2002
Published online: February 20, 2003 相似文献
22.
P K Litoria Ajay Mathur P K Sharma Charan kamal Singh 《Journal of the Indian Society of Remote Sensing》1997,25(4):261-272
Level-II urban land use information available in this Town and Country Planning maps, Survey of India toposteets for Phillaur and Phagwara towns and the land use information generated through visual interpretation of satellite data was digitized, integrated and analysed using PAMAP GIS. The land use map of the two towns suggest that the wastelands located near the point of present disposal can be utilised for siting sewage treatment plants in both the towns. The STP sites suggested were away from the thickly habttared area. It was observed that some of the areas earmarked for locating STP’s, were partially brought under habitation before the execution of the preject. Hence, it is necessary that planning and execution of such projects should be done on a real time basis so that the sites identified for locating STP’s are not brought under other land uses. 相似文献
23.
24.
25.
M. D. Sharma 《Geophysical Journal International》2004,159(2):703-710
26.
27.
28.
29.
30.