全文获取类型
收费全文 | 3985篇 |
免费 | 175篇 |
国内免费 | 32篇 |
专业分类
测绘学 | 88篇 |
大气科学 | 299篇 |
地球物理 | 1467篇 |
地质学 | 1236篇 |
海洋学 | 308篇 |
天文学 | 596篇 |
综合类 | 16篇 |
自然地理 | 182篇 |
出版年
2021年 | 63篇 |
2020年 | 61篇 |
2019年 | 51篇 |
2018年 | 136篇 |
2017年 | 141篇 |
2016年 | 221篇 |
2015年 | 155篇 |
2014年 | 187篇 |
2013年 | 254篇 |
2012年 | 168篇 |
2011年 | 178篇 |
2010年 | 185篇 |
2009年 | 201篇 |
2008年 | 167篇 |
2007年 | 162篇 |
2006年 | 99篇 |
2005年 | 95篇 |
2004年 | 117篇 |
2003年 | 93篇 |
2002年 | 64篇 |
2001年 | 59篇 |
2000年 | 61篇 |
1999年 | 48篇 |
1998年 | 57篇 |
1997年 | 48篇 |
1996年 | 55篇 |
1995年 | 35篇 |
1994年 | 48篇 |
1993年 | 43篇 |
1992年 | 37篇 |
1991年 | 29篇 |
1990年 | 45篇 |
1989年 | 33篇 |
1988年 | 38篇 |
1987年 | 30篇 |
1986年 | 41篇 |
1985年 | 26篇 |
1984年 | 44篇 |
1983年 | 42篇 |
1982年 | 44篇 |
1981年 | 27篇 |
1980年 | 25篇 |
1979年 | 38篇 |
1978年 | 34篇 |
1977年 | 31篇 |
1975年 | 26篇 |
1974年 | 31篇 |
1973年 | 28篇 |
1972年 | 30篇 |
1971年 | 30篇 |
排序方式: 共有4192条查询结果,搜索用时 31 毫秒
161.
162.
163.
164.
165.
166.
167.
168.
Grajales-Nishimura José Manuel Ramos-Arias Mario Alfredo Solari Luigi Murillo-Muñetón Gustavo Centeno-García Elena Schaaf Peter Torres-Vargas Ricardo 《International Journal of Earth Sciences》2018,107(3):1005-1031
International Journal of Earth Sciences - The Juchatengo complex (JC) suite is located between the Proterozoic Oaxacan complex to the north and the Xolapa complex to the south, and was amalgamated... 相似文献
169.
Rainfall thresholds for the triggering of landslides considering previous soil moisture conditions (Asturias,NW Spain) 总被引:1,自引:0,他引:1
Pablo Valenzuela María José Domínguez-Cuesta Manuel Antonio Mora García Montserrat Jiménez-Sánchez 《Landslides》2018,15(2):273-282
Given its geological and climatic conditions and its rugged orography, Asturias is one of the most landslide prone areas in the North of Spain. Most of the landslides occur during intense rainfall episodes. Thus, precipitation is considered the main triggering factor in the study area, reaching average annual values of 960 mm. Two main precipitation patterns are frequent: (i) long-lasting periods of moderate rainfall during autumn and winter and (ii) heavy short rainfall episodes during spring and early summer. In the present work, soil moisture conditions in the locations of 84 landslides are analysed during two rainfall episodes, which represent the most common precipitation patterns: October–November 2008 and June 2010. Empirical data allowed the definition of available water capacity percentages of 99–100% as critical soil moisture conditions for the landslide triggering. Intensity-duration rainfall thresholds were calculated for each episode, considering the periods with sustained high soil moisture levels before the occurrence of each analysed landslide event. For this purpose, data from daily water balance models and weather stations were used. An inverse relationship between the duration of the precipitation and its intensity, consistent with published intensity-duration thresholds, was observed, showing relevant seasonal differences. 相似文献
170.
Mateja Jemec Auflič Matjaž Mikoš Timotej Verbovšek Željko Arbanas Snježana Mihalić Arbanas 《Landslides》2018,15(2):381-384
The 3rd Regional Symposium on Landslides in the Adriatic-Balkan Region (3rd ReSyLAB) was held in Ljubljana, Slovenia, from June 11 to 13, 2017, with 70 participants from nine countries (Austria, Bosnia and Hercegovina, Croatia, Czech Republic, Italy, Republic of Macedonia, Serbia, Slovenia, Spain)—scientists, engineers, researchers, students, experts, politicians, and other decision-makers working in the area of landslide risk reduction in the region. The ReSyLAB is a biannual event organized by the Adriatic-Balkan Network of the International Consortium on Landslides (ICL ABN). Being an important form of activities of this ICL regional network comprising of six ICL members from four countries, it was also a contribution of the International Consortium on Landslides (ICL) to the implementation of the Sendai Framework for Disaster Risk Reduction 2015–2030. This article reports on the main outcomes of the 3rd ReSyLAB Symposium. Altogether, 41 abstracts were published in the symposium book of abstracts, and the symposium proceedings with over 20 reviewed full papers are under preparation to be printed early in 2018. During the 3rd ReSyLAB, a five invited keynote lectures have been presented, and 28 oral presentations are given to the audience. An important part of the symposium was a Round Table entitled “Enhancing cooperation between landslide research community and end users.” On the last day of the symposium, over 30 experts participated in two post-symposium study tours in Slovenia. 相似文献