全文获取类型
收费全文 | 788篇 |
免费 | 64篇 |
专业分类
测绘学 | 18篇 |
大气科学 | 66篇 |
地球物理 | 265篇 |
地质学 | 297篇 |
海洋学 | 27篇 |
天文学 | 113篇 |
综合类 | 10篇 |
自然地理 | 56篇 |
出版年
2024年 | 2篇 |
2023年 | 7篇 |
2022年 | 9篇 |
2021年 | 17篇 |
2020年 | 23篇 |
2019年 | 22篇 |
2018年 | 53篇 |
2017年 | 59篇 |
2016年 | 83篇 |
2015年 | 68篇 |
2014年 | 59篇 |
2013年 | 64篇 |
2012年 | 39篇 |
2011年 | 41篇 |
2010年 | 35篇 |
2009年 | 37篇 |
2008年 | 25篇 |
2007年 | 31篇 |
2006年 | 31篇 |
2005年 | 16篇 |
2004年 | 12篇 |
2003年 | 11篇 |
2002年 | 12篇 |
2001年 | 4篇 |
2000年 | 10篇 |
1999年 | 6篇 |
1998年 | 11篇 |
1997年 | 3篇 |
1996年 | 10篇 |
1995年 | 7篇 |
1994年 | 3篇 |
1993年 | 4篇 |
1991年 | 5篇 |
1990年 | 2篇 |
1988年 | 2篇 |
1986年 | 2篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1983年 | 1篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 1篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1976年 | 1篇 |
1974年 | 1篇 |
1973年 | 3篇 |
1971年 | 2篇 |
1970年 | 1篇 |
1969年 | 2篇 |
排序方式: 共有852条查询结果,搜索用时 0 毫秒
201.
202.
203.
204.
205.
Arkadiusz Sołtysiak 《Climatic change》2016,136(3-4):389-394
206.
207.
208.
209.
The article is composed of two sections. In the first section, the authors describe the application of minimum line dimensions which are dependent on line shape, width and the operational scale of the map. The proposed solutions are based on the Euclidean metric space, for which the minimum dimensions of Saliszczew’s elementary triangle (Elementary triangle – is the term pertaining to model, standard triangle of least dimensions securing recognizability of a line. Its dimensions depend on scale of the map and width of the line representing it. The use of a triangle in the simplification process is as follows: triangles with sides (sections) on an arbitrary line and bases (completing the sides) are compared with lengths of the shorter side and the base of the elementary triangle.) were adapted. The second part of the article describes an application of minimum line dimensions for verifying and assessing generalized data. The authors also propose a method for determining drawing line resolution to evaluate the accuracy of algorithm simplification. Taking advantage of the proposed method, well-known simplification algorithms were compared on the basis of qualitative and quantitative evaluation. Moreover, corresponding with the methods of simplified data accuracy assessment the authors have extended these solutions with the rejected data. This procedure has allowed the identification of map areas where graphic conflicts occurred. 相似文献
210.
Bérénice Preller Julia Affolderbach Christian Schulz Sebastian Fastenrath Boris Braun 《The Professional geographer》2017,69(2):214-224
Knowledge coproduction between practitioners and scientists offers promising opportunities for the emerging research field of the geography of sustainability transitions. Drawing on experiences from an international research project on urban green building transitions, this article explores the potentials and challenges of interactive and collaborative knowledge generation methods in understanding sustainability transitions. Our results show that ongoing engagement with local experts and practitioners through interactive World Café workshops and follow-up exchanges allows for a better understanding of the research context and knowledge exchange to all participants involved in the research process. 相似文献