全文获取类型
收费全文 | 892篇 |
免费 | 4篇 |
国内免费 | 16篇 |
专业分类
测绘学 | 7篇 |
大气科学 | 32篇 |
地球物理 | 141篇 |
地质学 | 341篇 |
海洋学 | 155篇 |
天文学 | 210篇 |
综合类 | 4篇 |
自然地理 | 22篇 |
出版年
2023年 | 3篇 |
2022年 | 13篇 |
2021年 | 21篇 |
2020年 | 22篇 |
2019年 | 34篇 |
2018年 | 64篇 |
2017年 | 30篇 |
2016年 | 36篇 |
2015年 | 15篇 |
2014年 | 37篇 |
2013年 | 54篇 |
2012年 | 53篇 |
2011年 | 53篇 |
2010年 | 41篇 |
2009年 | 36篇 |
2008年 | 44篇 |
2007年 | 54篇 |
2006年 | 40篇 |
2005年 | 14篇 |
2004年 | 26篇 |
2003年 | 25篇 |
2002年 | 21篇 |
2001年 | 15篇 |
2000年 | 9篇 |
1999年 | 9篇 |
1998年 | 12篇 |
1997年 | 10篇 |
1996年 | 6篇 |
1995年 | 9篇 |
1994年 | 5篇 |
1993年 | 4篇 |
1992年 | 4篇 |
1991年 | 7篇 |
1990年 | 9篇 |
1989年 | 5篇 |
1987年 | 6篇 |
1986年 | 4篇 |
1985年 | 4篇 |
1984年 | 4篇 |
1983年 | 6篇 |
1981年 | 5篇 |
1978年 | 2篇 |
1977年 | 5篇 |
1976年 | 4篇 |
1974年 | 4篇 |
1973年 | 3篇 |
1972年 | 4篇 |
1970年 | 4篇 |
1966年 | 2篇 |
1965年 | 3篇 |
排序方式: 共有912条查询结果,搜索用时 15 毫秒
271.
Erokhin Yu. V. Koroteev V. A. Ivanov K. S. Khiller V. V. Farrakhova N. N. 《Doklady Earth Sciences》2020,491(1):142-145
Doklady Earth Sciences - Fluorcalciobritholite and fluorbritholite-(Ce)—rare-earth minerals from the apatite supergroup—have been found in the course of the study in monzogabbro from... 相似文献
272.
Ivanov K. S. Koroteev V. A. Erokhin Yu. V. Ponomarev V. S. Travin A. V. 《Doklady Earth Sciences》2020,491(1):135-138
Doklady Earth Sciences - The 40Ar/39Ar dating of metamorphic schists from the basement of the West Siberian Platform exposed by Lenzitskaya well no. 77 on the Taz Peninsula was performed. The... 相似文献
273.
Zhuravskiy D. M. Prokhorova U. V. Ivanov B. V. Yanjura A. S. Kuprikov N. M. Kurapov M. V. 《Izvestiya Atmospheric and Oceanic Physics》2020,56(9):927-935
Izvestiya, Atmospheric and Oceanic Physics - The results of using an original procedure for estimating albedo from the photogrammetric data and exposure parameters by an unmanned aerial vehicle... 相似文献
274.
We present a semiempirical model of the bottom turbulent boundary layer aimed at the application as one of the components
of the procedure of evaluation of the vertical distribution of the concentration of suspensions in the coastal region of the
sea. The model is based on data of laboratory experiments and is suitable for the sand bottom in a broad range of amplitudes
of the bottom velocities of the wave origin. 相似文献
275.
Precise geodesy with the Very Long Baseline Array 总被引:2,自引:2,他引:0
Leonid Petrov David Gordon John Gipson Dan MacMillan Chopo Ma Ed Fomalont R. Craig Walker Claudia Carabajal 《Journal of Geodesy》2009,83(9):859-876
We report on a program of geodetic measurements between 1994 and 2007 which used the Very Long Baseline Array (VLBA) and up
to ten globally distributed antennas. One of the goals of this program was to monitor positions of the array at a 1 mm level
of accuracy and to tie the VLBA into the international terrestrial reference frame. We describe the analysis of these data
and report several interesting geophysical results including measured station displacements due to crustal motion, earthquakes,
and antenna tilt. In terms of both formal errors and observed scatter, these sessions are among the very best geodetic very
long baseline interferometry experiments. 相似文献
276.
277.
The Chelyabinsk meteoroid fall has been used to show that an appropriate ionospheric response can be recorded from signals of satellite radar systems. This can be done using dual-frequency or single-frequency equipment. The recording time of the response commencement has been used to estimate the propagation rate of primary disturbance in the atmosphere. 相似文献
278.
279.
A. S. Astakhov V. V. Sattarova A. I. Svininnikov N. V. Astakhova M. M. Domanov M. V. Ivanov 《Russian Journal of Pacific Geology》2007,1(5):418-434
This paper reports the results of an investigation of the chemical composition and distribution of manganese-rich metalliferous sediments in the Deryugin Basin. They compose an upper sedimentary layer up to 30 cm thick within a strip up to 40 km wide and 180 km long in the central part of the basin along the East Deryugin suture zone bounding the Deryugin sedimentary basin to the east. The sediments are enriched relative to the regional background composition in Mn (by a factor of 35); Au; Ni; Zn; Co (by a factor of 3–5); and, locally, in Mo, V, Ba, Cu, Pb, and Hg. It was supposed that their formation was controlled by several processes: precipitation of Mn and some other trace elements from hydrothermal plumes of seawater that occasionally form above submarine hot vents in the northern part of the basin, precipitation from anoxic bottom waters at the eastern boundary of the Deryugin sedimentary basin, and early diagenetic migration of Mn into the surface sediments. 相似文献
280.
Tetsuya Komabayashi Kei Hirose Nagayoshi Sata Yasuo Ohishi Leonid S. Dubrovinsky 《Earth and Planetary Science Letters》2007,260(3-4):564-569
A phase transition in pure CaSiO3 perovskite was investigated at 27 to 72 GPa and 300 to 819 K by in-situ X-ray diffraction experiments in an externally-heated diamond-anvil cell. The results show that CaSiO3 perovskite takes a tetragonal form at 300 K and undergoes phase transition to a cubic structure above 490–580 K in a pressure range studied here. The transition boundary is strongly temperature-dependent with a slightly positive dT / dP slope of 1.1 (± 1.3) K/GPa. It is known that the transition temperature depends on Al2O3 content dissolved in CaSiO3 perovskite [Kurashina et al., Phys. Earth Planet. Inter. 145 (2004) 67–74]. The phase transition in CaSiO3(+ 3 wt.% Al2O3) perovskite therefore could occur in a cold subducted mid-oceanic ridge basalt (MORB) crust at about 1200 K in the upper- to mid-lower mantle. This phase transition is possibly ferroelastic-type and may cause large seismic anomalies in a wide depth range. 相似文献