共查询到20条相似文献,搜索用时 343 毫秒
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杨新军 《地理与地理信息科学》1997,(3)
中国导游翻译第一人王连义教授杨新军(北京大学城市与环境学系北京:100871)王连义教授是我国著名的旅游接待管理、导游专家,现任国旅培训中心主任,曾任历届中国导游大赛裁判长。他在国旅总社从事旅游翻译、导游工作多年,对我国导游事业的兴起与发展作出了重大... 相似文献
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Crustal structure beneath western and eastern Iceland from surface waves and receiver functions 总被引:1,自引:0,他引:1
Zhijun Du G. R. Foulger B. R. Julian R. M. Allen G. Nolet W. J. Morgan B. H. Bergsson P. Erlendsson S. Jakobsdottir S. Ragnarsson R. Stefansson K. Vogfjord 《Geophysical Journal International》2002,149(2):349-363
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Variations in the crustal structure beneath western Turkey 总被引:6,自引:0,他引:6
Paul Saunders Keith Priestley & Tuncay Taymaz 《Geophysical Journal International》1998,134(2):373-389
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Rock as a critical-point system and the inherent implausibility of reliable earthquake prediction 总被引:1,自引:0,他引:1
P. C. Leary 《Geophysical Journal International》1997,131(3):451-466
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Continental collisions and seismic signature 总被引:6,自引:0,他引:6
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Summary. Combined analysis of P - and S -wave data from seismic refraction lines in Jordan has led to the derivation of a Poisson's ratio model for the crust. This model shows that the upper crust, including the sediments, has an average Poisson's ratio of around 0.25, except beneath NW Jordan where the sediments have a high ratio of around 0.32. However, the lower crust below about 20 km depth has high Poisson's ratios ranging from 0.29 to 0.32. These high Poisson's ratios may be interpreted mineralogically in terms of high feldspar and low quartz content in the rocks (e.g. gneiss, amphibolite) of the lower crust or fluid phases in the form of separated penny-shaped inclusions. 相似文献
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David Beamish 《Geophysical Journal International》1986,84(3):619-640
Summary. In terms of lateral variations in conductivity structure, the southern Southern Uplands and Northumberland Basin are characterized by a region of attenuated vertical magnetic fields with small spatial gradients reflecting the presence of a substantial conducting zone. Five magnetotelluric data sets from the region have been analysed to provide accurate and unbiased estimates of the impedance tensor. The response data are used to investigate the deep geoelectric crustal structure of the region. Three appropriate sets of response data have been subjected to two construction algorithms for 1-D inversion. The geoelectric profiles recovered identify a deep crustal conducting zone underlying the Northumberland Basin. The zone, modelled as a layered structure, dips steeply from mid-crustal depths underneath the Northumberland Basin to lower crustal depths to the NW. The structure thus correlates, in location and geometry, with a deep crustal reflecting wedge detected offshore by a deep seismic reflection profile. 相似文献