全文获取类型
收费全文 | 148篇 |
免费 | 4篇 |
国内免费 | 1篇 |
专业分类
测绘学 | 1篇 |
大气科学 | 4篇 |
地球物理 | 62篇 |
地质学 | 63篇 |
海洋学 | 15篇 |
天文学 | 5篇 |
综合类 | 1篇 |
自然地理 | 2篇 |
出版年
2022年 | 2篇 |
2021年 | 4篇 |
2020年 | 1篇 |
2019年 | 4篇 |
2018年 | 8篇 |
2017年 | 2篇 |
2016年 | 11篇 |
2015年 | 7篇 |
2014年 | 6篇 |
2013年 | 8篇 |
2012年 | 11篇 |
2011年 | 13篇 |
2010年 | 9篇 |
2009年 | 10篇 |
2008年 | 13篇 |
2007年 | 12篇 |
2006年 | 9篇 |
2005年 | 5篇 |
2003年 | 3篇 |
2002年 | 2篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1999年 | 1篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1989年 | 1篇 |
1986年 | 1篇 |
排序方式: 共有153条查询结果,搜索用时 10 毫秒
91.
C. Emdad Haque Dale Dominey-Howes Nuray Karanci Gerassimos Papadopoulos Ahmet Yalciner 《Natural Hazards》2003,29(3):307-308
Editorial Introduction
Editorial 相似文献92.
Mehmet Aktas Galip Aydin Andrea Donnellan Geoffrey Fox Robert Granat Lisa Grant Greg Lyzenga Dennis McLeod Shrideep Pallickara Jay Parker Marlon Pierce John Rundle Ahmet Sayar Terry Tullis 《Pure and Applied Geophysics》2006,163(11-12):2281-2296
We describe the goals and initial implementation of the International Solid Earth Virtual Observatory (iSERVO). This system is built using a Web Services approach to Grid computing infrastructure and is accessed via a component-based Web portal user interface. We describe our implementations of services used by this system, including Geographical Information System (GIS)-based data grid services for accessing remote data repositories and job management services for controlling multiple execution steps. iSERVO is an example of a larger trend to build globally scalable scientific computing infrastructures using the Service Oriented Architecture approach. Adoption of this approach raises a number of research challenges in millisecond-latency message systems suitable for internet-enabled scientific applications. We review our research in these areas. 相似文献
93.
94.
Marlon E. Pierce Geoffrey C. Fox Mehmet S. Aktas Galip Aydin Harshawardhan Gadgil Zhigang Qi Ahmet Sayar 《Pure and Applied Geophysics》2008,165(3-4):635-651
We describe our distributed systems research efforts to build the “cyberinfrastructure” components that constitute a geophysical Grid, or more accurately, a Grid of Grids. Service-oriented computing principles are used to build a distributed infrastructure of Web accessible components for accessing data and scientific applications. Our data services fall into two major categories: Archival, database-backed services based around Geographical Information System (GIS) standards from the Open Geospatial Consortium, and streaming services that can be used to filter and route real-time data sources such as Global Positioning System data streams. Execution support services include application execution management services and services for transferring remote files. These data and execution service families are bound together through metadata information and workflow services for service orchestration. Users may access the system through the QuakeSim scientific Web portal, which is built using a portlet component approach. 相似文献
95.
Forward modelling receiver functions for crustal structure beneath station TBZ (Trabzon, Turkey) 总被引:4,自引:0,他引:4
Özcan Çakr Murat Erduran Hakan Çnar & Ahmet Ylmaztürk 《Geophysical Journal International》2000,140(2):341-356
We use teleseismic three-component digital data from the Trabzon, Turkey broadband seismic station TBZ to model the crustal structure by the receiver function method. The station is located at a structural transition from continental northeastern Anatolia to the oceanic Black Sea basin. Rocks in the region are of volcanic origin covered by young sediments. By forward modelling the radial receiver functions, we construct 1-D crustal shear velocity models that include a lower crustal low-velocity zone, indicating a partial melt mechanism which may be the source of surfacing magmatic rocks and regional volcanism. Within the top 5 km, velocities increase sharply from about 1.5 to 3.5 km s−1 . Such near-surface low velocities are caused by sedimentation, extending from the Black Sea basin. Velocities at around 20 km depth have mantle-like values (about 4.25 km s−1 ), which easily correlate to magmatic rocks cropping out on the surface. At 25 km depth there is a thin low-velocity layer of about 4.0 km s−1 . The average Moho velocity is about 4.6 km s−1 , and its depth changes from 32 to 40 km. Arrivals on the tangential components indicate that the Moho discontinuity dips approximately southwards, in agreement with the crustal thickening to the south. We searched for the solution of receiver functions around the regional surface wave group velocity inversion results, which helped alleviate the multiple solution problem frequently encountered in receiver function modelling.
Station TBZ is a recently deployed broadband seismic station, and the aim of this study is to report on the analysis of new receiver function data. The analysis of new data in such a structurally complex region provides constraining starting models for future structural studies in the region. 相似文献
Station TBZ is a recently deployed broadband seismic station, and the aim of this study is to report on the analysis of new receiver function data. The analysis of new data in such a structurally complex region provides constraining starting models for future structural studies in the region. 相似文献
96.
The city of Adapazarı — located in the Marmara Region of northwest Turkey — is situated on a deep sedimentary basin and was
the city most heavily damaged by the strong ground motion of the 17 August 1999 Kocaeli earthquake (moment magnitude Mw = 7.4). This study determines site amplifications of the attenuation relationships for shallow earthquakes in the Adapazarı
basin by using the previous ground motion prediction equations (GMPEs) and the traditional spectral ratio method. The site
amplifications are determined empirically by averaging the residuals between the observed and predicted peak ground acceleration
(PGA) and spectral acceleration (SA) values for various periods. Residuals are significantly correlated with the known characteristics
of geological units. A new attenuation model has also been developed for 5% damped spectral acceleration to determine the
dependence of strong ground motions on frequency. 相似文献
97.
Volkan Bakis Ahmet Erdem Edwin Budding Osman Demircan Hicran Bakis 《Astrophysics and Space Science》2005,296(1-4):131-134
An astrometric solution, together with time of minimum analysis, has been made for the multiple system XY Leonis (HIP 49136)
to identify the properties of the remote companion to the eclipsing pair (AB). From this solution, we derive the inclination
of the wide orbit (AB-cd) as 94.4∘± 0.2∘, angle of nodes as 247.3∘± 0.2∘, and the mass of the wide component (the dwarf binary cd) as 0.98 ± 0.2 M⊙. This study confirms that the light travel time effect can explain the sinusoidal O−C variation of the eclipsing system. 相似文献
98.
Recently, geographic information system Software’s are widely used in engineering geology applications. Such a study was performed
in the Eskisehir urban area of about 30 km2 via geo-engineering maps, cross-sections and panel-block diagrams, which are formed to predict the properties of foundation
soil. In order to determine the engineering geology properties of the region, physical and mechanical characteristics of the
soil profile were tested on 1,011 disturbed and 383 undisturbed samples from a total of 170 boreholes. Topographic, lithological
and geotechnical data of the region were compiled as a database in computer. Five geological cross-sections were drawn to
decipher specifically the alluvial deposits in detail in densely populated areas. Hence, geological characteristics of the
area were evaluated in a three-dimensional mode. Five standard penetration test (SPT) cross-sections at the same directions
and SPT, uniaxial compressive strength (qu) and soil class Zonation maps were produced at different depths and panel-block
diagrams were also created to define the geo-engineering properties of the investigation area. In this respect, the sub-surface
of the study area is fully visualized and useful predictor maps, cross-sections and panel-block diagrams are performed to
be used in further studies. 相似文献
99.
In Anatolia, throughout the centuries, caverns in tuffs have been used for food storage. The aim of this study is to investigate experimentally the dehumidification property of tuffs, and to confirm whether tuffs play any part in the humidity of the ecosystem in storage. According to tests carried out on the Eskisehir?CDerbent Ciftligi white tuffs and six different rock types from Turkey, it was found that the atmospheric moisture absorption ability of tuffs is relatively higher than those of other tested rocks. This suggests that the dehumidification property is a unique characteristic of tuffs. It may allow for the tuff walls to work as an air dehumidifier for storing food. 相似文献
100.
Vertical and horizontal variations of the frequency of crustal earthquakes (h ≤ 35 km) that have occurred in and around Turkey
are analyzed, using data from the Global Hypocenter Data Base and the IRIS data for the period 1964–1998. Fits of various
magnitude scales to the observations have been used to construct a homogeneous catalogue. Depth distribution of the parameters
derived from the Gutenberg–Richter relationship reveals that there is a depth dependence in the a- and b-values of the frequency
distribution. It is observed that unknown focal depths (0, 10, 33 km) are dominant in the total seismicity reported, and give
rise to substantial changes to the vertical distribution of these parameters. It is also observed that the parameters of either
a or b alone may not be used as a measure of regional seismicity of the study area in which high and low seismic activity
observed over short distances. In contrast, distribution of modal (a/b) values provides detailed images of the local areas
presented by high and low seismic zones. This study presents evidence that low b-values are associated with major strike-slip
faults, particularly exhibiting high apparent stresses.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献