Equation de Szebehely et principes variationnels     

François Puel 《Celestial Mechanics and Dynamical Astronomy》1984,32(4):349-353

Resume On montre l'équivalence entre l'équation de Szebehely du problème inverse et un problème variationnel déduit du principe de Maupertuis.

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Szebehely's equation and principle variations

We show that the inverse problem Szebehely's equations is equivalent to a multiple variation problem deduced from the principle of Maupertuis.

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Patterns in the Turkish reinsurance claim data, 1998–2002: An application of the extreme value theory     

B. Burçak Başbuğ  Henry P. Wynn 《Natural Hazards》2006,39(2):329-342

The devastating 1999 Marmara and Düzce earthquakes led to a significant increase in the earthquake studies in Turkey in geological, engineering and financial aspects. Extreme Value Theory (EVT) has a range of applications from stock market changes to natural disasters like floods and hurricanes. Here EVT is fitted to the ordinary and earthquake reinsurance claims of Turkey.  相似文献   

Paléoenvironnements et caractérisation des roches mères pétrolières des séries pré-salifères du bassin intérieur du Gabon     

Michel Mbina Mounguengui  François Baudin  Jacques Lang  Olivier Jocktane 《Comptes Rendus Geoscience》2003,335(3):327-334

The Interior Basin of Gabon, created during the break-up between South America and Africa, displays thick Neoproterozoic to Aptian p.p. fluvio-lacustrine deposits overlain by Aptian to Albian marine facies. Rock–Eval analyses from outcrop and drillhole samples show high content in organic matter (up to 25%) related to types I and II. These intervals are encountered within Permian, Neocomian–Barremian as well as Aptian siliciclastic succession. They constitute fairly good to excellent potential petroleum source rocks, which are most probably at the origin of oil indices recognized both in drillholes and in surface.  相似文献   

Simplified vibratory characterization of alluvial basins     

Jean-François Semblat  Roberto Paolucci  Anne-Marie Duval 《Comptes Rendus Geoscience》2003,335(4):365-370

For the analysis of seismic wave amplification, modal methods are interesting tools to study the modal properties of geological structures. Modal approaches mainly lead to information on such parameters as fundamental frequencies and eigenmodes of alluvial basins. For a specific alluvial deposit in Nice (France), a simplified modal approach involving the Rayleigh method is considered. This approach assumes a set of admissible shape functions for the eigenmodes and allows a fast estimation of the fundamental frequency of the basin. The agreement with other numerical results (Boundary Element Method) and experimental ones is fully satisfactory. The simplified modal method then appears as an efficient mean for the global vibratory characterization of geological structures towards resonance. To cite this article: J.-F. Semblat et al., C. R. Geoscience 335 (2003).  相似文献   

Wrench tectonics flip at oblique subduction. A model from New Zealand     

Jean Delteil  Jean-François Stéphan  Bernard Mercier de Lépinay  Étienne Ruellan 《Comptes Rendus Geoscience》2003,335(9):743-750

In eastern North Island New Zealand, oblique subduction of the Pacific Plate beneath the Australian Plate is associated with strain partitioning. Dextral along-strike component of displacement occurred first at Early Miocene major faults within the eastern fore-arc domain. These faults were active from Early Miocene to Pliocene times. Since Pliocene times, most of the movement occurs at western faults such as the Wellington Fault. The latter joins the back-arc domain to the north. The jump of wrench faulting is related to the oblique opening of the back-arc domain. Both phenomena are impeded southwards by the Hikurangi oceanic plateau entering the subduction zone. To cite this article: J. Delteil et al., C. R. Geoscience 335 (2003).  相似文献   

达拉布特镁铁质岩的Sr-Nd同位素及微量元素地球化学   总被引：1，自引：0，他引：1  

杨瑞瑛  刘丛强  高桥和也  增田彰正 《地球学报》1997,18(Z1):92-94

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云开群硅质岩的40Ar/39Ar年龄及其地质意义   总被引：2，自引：0，他引：2  

劳秋元  叶真华  胡世玲  桑海清 《地球学报》1997,18(Z1):89-101

粤西云开群浅变地层年代的确定对于研究华南地壳演化有重要意义。以往的同位素年龄值多测自其中的顺层火成岩，故对其他质意义有不同的理解。本文首次测得了云开群中硅质岩的40Ar/39Ar年龄，从而提供了云开群的沉积年代。  相似文献   

三峡工程前期地质研究与施工期地质验证     

冯彦勋  陈德基 《水文地质工程地质》1997,24(2):4-6,11

本文了三峡工程前期勘察研究的几个问题，即区域稳定性及地震活动，水库工程地质，库岸稳定性，水库移民迁建工程地质，环境地质问题，水库诱发地震问题，坝址及建筑物工程的水文地质问题，天然建筑材料等，还阐述了前期主要地质结论的验证，最后，论述了对断裂构造等的认识。  相似文献   

深基坑开挖环境效应的控制对策研究   总被引：1，自引：0，他引：1  

高伶琴  覃祖淼 《水文地质工程地质》1997,24(5):49-51,57

本文提出了深基坑开挖的环境效应的控制对策，强调要面向问题进行了降水设计及护坡设计。  相似文献   

工程地质力学综合集成理论及其在五强溪水电站船闸边坡上的应用   总被引：2，自引：0，他引：2  

刘大安  杨志法  尚彦军  刘英  柯天河  王常敏  王敬  唐纯华 《水文地质工程地质》1997,(2)

为了使工程地质学在工程建设和防灾减灾方面发挥更大的作用，作者主张在工程地质力学和系统科学指导下发展工程地质力学综合集成（EGMS）。本文主要论述了EGMS形成的基础、相应的方法和技术以及综合集成中的4个关键问题（包括应变体系、优先监测和加固突破口的设计方法，综合地质信息分析系统、时空综合分析方法等）。另外，还扼要地讨论了如何将EGMS用于五强溪水电站船闸边坡的问题。  相似文献