A Note on a General Algorithm for Two-Body Expansions     

Jacques Henrard 《Celestial Mechanics and Dynamical Astronomy》2000,76(4):283-289

This note describes briefly a technique, easily implemented with most computer algebra systems, for the purpose of computing the two-body expansions (in powers of the eccentricity and in Fourier series of the mean-anomaly) of a large class of functions of the distance, the true anomaly and/or the eccentric anomaly. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Paleozoic accretionary terranes in Northern Tianslian, NW China   总被引：14，自引：2，他引：12  

Liangshu Shu  Yuntang Chen  Huafu Lu  Jacques Charvet  Sebastie Laurent-Charvet  Donghao Yin 《中国地球化学学报》2000,19(3):193-202

During the paleozoic,the Northern Tianshan region of China in Central Asia consists of 7 allochthonous terranes which were situated in the ancient sino-Mongolian Ocean as volcanic arcs and splitted continental fragments.The tectonic framework was similar to that of Southwest pacific today,In the Late Paleozoic,these terranes started mutual amalgamation to cause strong thrusting.At thd end of Carboniferous,the Sino-mongolian ocean including several inter-terrane small sea basins closed and these terranes accreted on the margins of the Siberian and Tarim continents,The 6 ophiolitic zones zomong the terranes recorded this collision event.  相似文献   

IS THE GRENVILLE PROVINCE AN ANCIENT ANALOGUE OF THE HIMALAYAN BELT?     

Jacques MartignoleWT  ”BX 《地学前缘》2000,(Z1)

IS THE GRENVILLE PROVINCE AN ANCIENT ANALOGUE OF THE HIMALAYAN BELT?1　All埁ｇｒｅＣＪ ,2 4others.StructureandevolutionoftheHimalayan Tibetorogenicbelt[J].Nature ,1984,30 7:17～ 2 2 . 2　BurgJP ,DavyP ,MartinodJ .Shorteningofanaloguemodelsofthecontinentallithosphere :Newhypothesisforthefor mationoftheTibetanplateau[J].Tectonics ,1994,13:475～ 483. 3　BurtmanVS ,MolnarP .GeologicalandgeophysicalevidencefordeepsubductionofcontinentalcrustbeneaththePamir[C]…  相似文献   

Extension et sédimentation au paléozoïque terminal et au Mésozoïque dans le bassin de Majunga (Nord-Ouest de Madagascar)     

Yolande Razafindrazaka  Thogne Randriamananjara  Alain Piqu  Catherine Thouin  Edgard Laville  Jacques Malod  Jean-Pierre Rhault 《Journal of African Earth Sciences》1999,28(4):949-959

The Majunga Basin is located in the northwestern part of Madagascar with a N45–60°E trending axis. It was filled by almost exclusively continental Karoo Supergroup sediments, which are Permian to Early Jurassic in age, and by younger sequences, mainly marine, that were deposited from the Middle Jurassic to the present.The Karoo Basin geometry is deduced from the analysis of seismic sections. A central northeast trending horst is flanked by two sub-basins. Deposition of the Karoo sequences was controlled by these northeast trending faults. On the contrary, the Middle Jurassic to present sequences witness only a slight tilting of the basement towards the northwest.The development of the Majunga Basin includes, therefore, two successive stages. In the synrift episode, from Permian to Early Jurassic times, the sedimentation was syntectonic, controlled by synsedimentary faulting and the creation of a horst and graben extensive pattern. The postrift episode started during the Middle Jurassic.These two stages of the Majunga Basin development correspond to the geodynamic evolution recorded elsewhere in this part of the Gondwana.  相似文献   

Exploring image data assimilation in the prospect of high-resolution satellite oceanic observations   总被引：1，自引：1，他引：0  

Marina Durán Moro  Jean-Michel Brankart  Pierre Brasseur  Jacques Verron 《Ocean Dynamics》2017,67(7):875-895

Satellite sensors increasingly provide high-resolution (HR) observations of the ocean. They supply observations of sea surface height (SSH) and of tracers of the dynamics such as sea surface salinity (SSS) and sea surface temperature (SST). In particular, the Surface Water Ocean Topography (SWOT) mission will provide measurements of the surface ocean topography at very high-resolution (HR) delivering unprecedented information on the meso-scale and submeso-scale dynamics. This study investigates the feasibility to use these measurements to reconstruct meso-scale features simulated by numerical models, in particular on the vertical dimension. A methodology to reconstruct three-dimensional (3D) multivariate meso-scale scenes is developed by using a HR numerical model of the Solomon Sea region. An inverse problem is defined in the framework of a twin experiment where synthetic observations are used. A true state is chosen among the 3D multivariate states which is considered as a reference state. In order to correct a first guess of this true state, a two-step analysis is carried out. A probability distribution of the first guess is defined and updated at each step of the analysis: (i) the first step applies the analysis scheme of a reduced-order Kalman filter to update the first guess probability distribution using SSH observation; (ii) the second step minimizes a cost function using observations of HR image structure and a new probability distribution is estimated. The analysis is extended to the vertical dimension using 3D multivariate empirical orthogonal functions (EOFs) and the probabilistic approach allows the update of the probability distribution through the two-step analysis. Experiments show that the proposed technique succeeds in correcting a multivariate state using meso-scale and submeso-scale information contained in HR SSH and image structure observations. It also demonstrates how the surface information can be used to reconstruct the ocean state below the surface.  相似文献   

A comparison of incremental behaviour of elastoplastic and CLoE models     

Ren Chambon  Denis Caillerie  Jacques Desrues  Stphane Crochepeyre 《国际地质力学数值与分析法杂志》1999,23(4):295-316

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