全文获取类型
收费全文 | 337篇 |
免费 | 13篇 |
国内免费 | 1篇 |
专业分类
测绘学 | 4篇 |
大气科学 | 11篇 |
地球物理 | 111篇 |
地质学 | 140篇 |
海洋学 | 37篇 |
天文学 | 30篇 |
综合类 | 1篇 |
自然地理 | 17篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2021年 | 3篇 |
2020年 | 7篇 |
2019年 | 5篇 |
2018年 | 17篇 |
2017年 | 20篇 |
2016年 | 17篇 |
2015年 | 23篇 |
2014年 | 20篇 |
2013年 | 19篇 |
2012年 | 22篇 |
2011年 | 22篇 |
2010年 | 26篇 |
2009年 | 18篇 |
2008年 | 31篇 |
2007年 | 20篇 |
2006年 | 4篇 |
2005年 | 15篇 |
2004年 | 7篇 |
2003年 | 10篇 |
2002年 | 7篇 |
2001年 | 4篇 |
2000年 | 10篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 2篇 |
1988年 | 2篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1983年 | 1篇 |
排序方式: 共有351条查询结果,搜索用时 15 毫秒
281.
282.
283.
Simone Gabriele Parisi Moreno Mauro Antoniazzi Gabriele Cola Lorenzo Lovat Luigi Mariani Giacomo Morreale Kiss Zoltan Antonio Calò 《Climatic change》2014,126(3-4):443-454
Since 1740 until now, the Book of Vine Branches encompasses beautiful pictorial representations of shoots and sprouts, collected every year on April 24th in the vineyards of the Hungarian town of K?szeg. A long time series (1740–2009) of sprouts phenological development coded with the BBCH scale is obtained through paintings visual inspection. Consequently, a model relating sprouts development with thermal resources accumulation is developed on the base of Wien daily air temperature series for the 1857–2009 period. Thermal resources is obtained with the Normal Heat Hours approach, a response curve method that takes into account the nonlinear response of phenological development to temperature. The model, calibrated and validated on the 1930–2009 period, shows an overestimation of thermal resources when applied to the 1857–1929, due to the more advanced phenology of that phase. Since this advance can be ascribed to genetics and management instead of more favorable thermal conditions, model outputs previous to 1930 are decreased by a constant factor. Finally, the 1740–2009 time series of grapevine spring thermal resources is obtained applying the model to the complete phenological time series. The analysis of the series highlights a first phase (1740–1780) characterized by high and stable availability of thermal resources during the 1740–1780, a second phase (1781–1820) with the lowest level of resources, a phase of intermediate availability (1821–1929) and a final present phase (1930–2009) with renewed high availability. The adopted method overcomes the lack of correlation for the post 1960 period shown by previous works. 相似文献
284.
de Freitas Pedro Paulo Amorim Felipe de Luca Lopes Mill Guilherme Nogueira da Costa Vladimir Santos Gabioux Mariela Cirano Mauro Paiva Afonso de Moraes 《Ocean Dynamics》2019,69(10):1203-1215
Ocean Dynamics - Near-inertial oscillations (NIO) are intermittent motions with a frequency close to the inertial frequency and represent an important fraction of the energy to the currents in the... 相似文献
285.
Mauro Rosi 《Bulletin of Volcanology》1992,54(5):429-434
Observations on phreatomagmatic ash deposits of Phlegraean Fields and Vesuvius supply evidence for the origin of vesiculated tuff in a cool environment. Early deposition by fallout of a matrix-free bed of damp accretionary lapilli is followed by deposition of cohesive mud or a mud rain. The lapilli bed becomes partly or completely transformed into a vesiculated tuff by mud percolation and eventual coalescence of accretionary lapilli with consequent trapping of air originally contained in the interstices. The proposed mechanism accounts for vesiculated tuff formation in distal deposits beyond limits commonly attained by pyroclastic surges. This same mechanism may, nevertheless, also operate in proximal tuff-ring and cone deposits during fallout of phreatomagmatic ash separating bed sets in surge-dominated successions. The sequence of events in the proposed model fits well with the evolution of a cooling phreatomagmatic ash cloud in which early ash aggregation (accretionary lapilli fallout) is followed closely by steam condensation (mud or muddy rainfall). This new model invoking a cool-temperature origin is intended to be complementary to previously proposed theories. Although difficult to assess because of the often complete obliteration of original lapilli, the process is believed to be relatively common in the generasion of vesiculated tuffs within phreatomagmatic deposits. 相似文献
286.
Dolce Mauro Lagomarsino Sergio Varum Humberto 《Bulletin of Earthquake Engineering》2022,20(4):1897-1900
Bulletin of Earthquake Engineering - 相似文献
287.
Ismaël Riedel Philippe Guéguen Mauro Dalla Mura Erwan Pathier Thomas Leduc Jocelyn Chanussot 《Natural Hazards》2015,76(2):1111-1141
288.
289.
290.
Mauro Pietro Negri 《Journal of Asian Earth Sciences》2012,43(1):145-149
A Late Pleistocene molluscan fauna sampled at Ban Praksa, near the Chao Phraya River mouth (Lower Central Plain of Bangkok, Thailand) is herein analyzed and paleoecologically characterized, revealing a shallow infralittoral, coarse/hard-bottomed environment. The comparison of the Ban Praksa association with several coeval ones recovered from Phra Pradaeng Formation seems to be evidence of a 10,000 year hiatus between two separate groups of marine faunas, possibly belonging to different interstadial transgressive peaks that occurred during the long-term sea-level regression following the Last Interglacial. 相似文献