全文获取类型
收费全文 | 339篇 |
免费 | 10篇 |
国内免费 | 24篇 |
专业分类
测绘学 | 5篇 |
大气科学 | 32篇 |
地球物理 | 128篇 |
地质学 | 149篇 |
海洋学 | 17篇 |
天文学 | 21篇 |
综合类 | 10篇 |
自然地理 | 11篇 |
出版年
2022年 | 6篇 |
2021年 | 9篇 |
2020年 | 9篇 |
2019年 | 5篇 |
2018年 | 13篇 |
2017年 | 13篇 |
2016年 | 15篇 |
2015年 | 19篇 |
2014年 | 19篇 |
2013年 | 28篇 |
2012年 | 9篇 |
2011年 | 20篇 |
2010年 | 9篇 |
2009年 | 8篇 |
2008年 | 11篇 |
2007年 | 11篇 |
2006年 | 10篇 |
2005年 | 9篇 |
2004年 | 11篇 |
2003年 | 6篇 |
2002年 | 12篇 |
2001年 | 9篇 |
2000年 | 12篇 |
1999年 | 6篇 |
1998年 | 9篇 |
1997年 | 6篇 |
1996年 | 7篇 |
1995年 | 3篇 |
1994年 | 2篇 |
1993年 | 4篇 |
1992年 | 3篇 |
1989年 | 4篇 |
1988年 | 4篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1985年 | 5篇 |
1984年 | 3篇 |
1983年 | 5篇 |
1982年 | 5篇 |
1980年 | 7篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1977年 | 2篇 |
1976年 | 1篇 |
1975年 | 5篇 |
1973年 | 1篇 |
1972年 | 4篇 |
1971年 | 2篇 |
1969年 | 1篇 |
1958年 | 1篇 |
排序方式: 共有373条查询结果,搜索用时 46 毫秒
91.
Vlastislav Červený Ivan Pšenčík Reviewer J. Vaněk 《Studia Geophysica et Geodaetica》1972,16(4):356-366
Summary A method for computing certain types of diffracted rays and corresponding travel-time curves in laterally inhomogeneous media with slightly curved interfaces is suggested. Numerical examples are presented.Dedicated to Academician Alois Zátopek on His 65th Birthday 相似文献
92.
93.
MAHongming XUWei MAIKangsen LIUFUZhiguo CHENHong 《中国海洋大学学报(英文版)》2004,3(2):145-149
1 Introduction Actinisanimportantcontractileproteinineukary oticcells .Itisoneofthetwomajorcomponentsin volvedinthecontractionofmusclecells .Innon mus clecells ,itisthemajorpartofcytoskeletoninvolvedinmanyprocessessuchascellmotility ,endocytosis ,exocyt… 相似文献
94.
Studia Geophysica et Geodaetica - 相似文献
95.
Dimensionless Time-Drawdown Plots of Late Aquifer Test Data 总被引:1,自引:0,他引:1
Zekâi en 《Ground water》1988,26(5):615-618
96.
Vlastislav Červený Jaromír Janský Reviewer I. Pšenčík 《Studia Geophysica et Geodaetica》1985,29(1):49-67
Summary A procedure of fast computation of body-wave ray synthetic seismograms in vertically inhomogeneous media is suggested. The procedure uses a special approximation of the velocitydepth distribution which guarantees continuity of the first and second derivatives of velocity and does not generate false low-velocity layers (oscillations in the velocity-depth function). The ZESY82 program package, which is based on the suggested procedure, is described. The point source with an arbitrary radiation pattern may be situated at any points of the model, the receivers are situated regularly or irregularly along any profile on the Earth's surface, containing the epicentre. Numerical examples of the synthetic record sections for a model of the Earth's crust and the uppermost mantle are given.
¶rt;aam m¶rt; m ama ummuu a mua ¶rt;¶rt; ¶rt;, u¶rt; u nua annuauu m aa, ma nuam nm mu u n u m nu¶rt; u nu¶rt;um aau um nu mu. am nua aumn na ZESY82, a a m m¶rt;. umu aamumu uu an m ¶rt;u; nuuu ¶rt; m an¶rt; ¶rt; nu, ¶rt;a num. u¶rt; nu ummuu a ¶rt; ¶rt; ¶rt;u u amuu.相似文献
97.
Vladimír Tobyáš Jaroslav Fiedler Dana Knaislová Dana Procházková Reviewer I. Pšenčík 《Studia Geophysica et Geodaetica》1985,29(1):68-74
Summary The effectiveness of recording seismic phenomena in the Kruné hory (Mts.) region in NW Bohemia by selected stations in the CSR, GDR and Poland has been estimated. Magnitude isolines of the weakest earthquakes, which can be localized and detected with an 0.9 probability, were calculated on the basis of the level of seismic disturbances at the individual stations and of the empirical dependence of the attenuation of seismic waves with distance.
a a mum umauu uu u amu ¶rt; ana¶rt; uu uau mauu a mumuu , u a a uu n a m¶rt; mau u nuu auumu amau uu m amu u auma uuuu aum¶rt; a a mu, m mm 0.9 auuam u aum.相似文献
98.
Jana Konopásková Vlastislav Červený Reviewer I. Pšenčík 《Studia Geophysica et Geodaetica》1984,28(1):19-35
m¶rt;au n unm ¶rt; u ¶rt;uau uu n m nm ¶rt; ¶rt;. a uau ¶rt;m a ma m nau a¶rt;a, amu aa mu. au mu uu naam, m m¶rt;au n ¶rt;am ¶rt;mam m mam ¶rt;a u amu aa mu (. u. 9). aumu amu, uauau n ma nam ¶rt;a . ¶rt; amu m am ¶rt;m ¶rt;am mumm mam a naama am, an. aa uuau n, naama uauau n, um¶rt;. 相似文献
99.
Fiona Nunan Dražen Cepić Bwambale Mbilingi Konstantine Odongkara Ernest Yongo Monica Owili 《社会与自然资源》2018,31(3):306-319
Social ties influence access to knowledge and cooperation in natural resource management, with the sharing of certain characteristics thought to be positive for social cohesion and participatory forms of management. In this article, a holistic characterisation of fisherfolk personal networks is developed, disaggregating results by the main occupational groups within the fisheries studied, to provide a more nuanced understanding of the personal networks of types of fisherfolk. Links are then made between the characteristics of personal networks and evidence on how fisherfolk benefit from their networks, interpreted as contributing to social cohesion within the communities. The personal networks of fisherfolk (boat crew, boat owners and traders/processors) of Kenya, Tanzania and Uganda bordering Lake Victoria were investigated using personal network analysis, with fisherfolk asked who they discuss their fisheries activities with. The analysis found that networks based on the same occupation were more characteristic of fish traders/processors networks than those of boat crew and boat owners and that shared ethnicity, gender and location were characteristic of boat owner and boat crew networks, though shared ethnicity may reflect the composition of the communities rather than choice. Social and economic interactions within the networks were based on provision of credit, social support and advice, suggesting that these form the basis of social cohesion and should be taken into consideration in working with fishing communities in both development interventions and designing collaborative management approaches. 相似文献
100.
Şamil Şen 《Natural Hazards》2007,43(3):351-363
Twenty seven buildings collapsed and 2076 buildings were heavily damaged during 17 August 1999 Izmit Earthquake in Avc?lar (west of Istanbul), which is nearly 100 km from the epicenter of the earthquake. The geology of Avc?lar consists of Upper Miocene poorly bounded conglomerate and sandstone (Çukurçe?me formation), claystone with sandstone and limestone interbedding (Güngören member) and limestone with sandstone and claystone interbedding (Bak?rköy formation). Lithological and geotechnical parameters of these formations in Avc?lar are not different from non damaged parts of the western Istanbul such as Zeytinburnu, Bak?rköy and Beylikdüzü, but these formations were cut by several faults in the damaged area. Collapsed and damaged buildings are located on this fault zone. Thus, cause of large amplification and damage in Avc?lar might be related with this fault zone because the fault zone behaves as a waveguide trapping seismic energy. 相似文献