Collisions of massive gas clouds with primordial chemical composition     

A. A. Suchkov  Yu. A. Shchekinov  M. A. Édel'man 《Astrophysics》1982,18(4):360-367

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Statistical simulation of the Oosterhoff effect     

A. M. Éigenson  O. S. Yatsyk 《Astrophysics》1985,22(2):246-251

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Interaction of vortex and irrotational motions in relativistic hydromechanics. IV     

A. D. Chernin  E. D. Éidel'man 《Astrophysics》1971,7(2):186-188

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On the radiation of electromagnetic waves by relativistic clusters of charged particles     

V. Ya. Éidman 《Astrophysics》1971,7(1):78-81

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The motion of the perihelion of Trojan asteroids     

Bálint Érdi 《Celestial Mechanics and Dynamical Astronomy》1979,20(1):59-67

The problem is investigated by using the equations of Jupiter's main perturbations in the eccentricity and in the perihelion longitude of Trojan asteroids. The limits and the period of the variation of the eccentricity and of the perihelion longitude are calculated for 30 Trojans. The perihelion is shown to circulate in 20 cases and to librate for 10 asteroids.  相似文献   

Variabilité spatiale du signal palynologique dans le bassin de Paris à la limite Dogger–Malm     

Vincent Huault  Marcel Élie  Régine Ruck-Mosser 《Comptes Rendus Geoscience》2003,335(4):401-409

The drilling of new cores performed for ANDRA in eastern France allowed us to compare palynological data between central and eastern parts of the Paris Basin. Such a comparison, which was also motivated by the existence of a set of geochemical data in contradiction with the first palynological results, showed a spatial differentiation in palynological record from the Oxfordian. Such a palynological signal could result from overlapping of both local and global signals, the latter being in connection with the contemporaneous opening of proto-Atlantic Ocean. It could also be of major palaeogeographic and palaeoclimatic interest. To cite this article: V. Huault et al., C. R. Geoscience 335 (2003).  相似文献   

Métabasites de la cordillère occidentale d'Équateur,témoins du soubassement océanique des Andes d'Équateur     

Émilie Beaudon  Jean-Emmanuel Martelat  Andrea Amórtegui  Henriette Lapierre  Etienne Jaillard 《Comptes Rendus Geoscience》2005,337(6):625-634

The building-up of the Andean Range is linked to the subduction of the Pacific lithosphere beneath the South American plate. However, the formation of the Central Andes is marked by continental crustal shortening, whereas accretion and underplating of exotic oceanic terranes occurred in the northern Andes. The study of various magmatic and metamorphic rocks exhumed in the Western Cordillera of Ecuador by Miocene transpressive faults enables us to constrain the nature and thermal evolution of the crustal root of this part of Ecuador. These rocks are geochemically similar to oceanic plateau basalts. The thermobarometric peak conditions of a granulite and an amphibolite indicate temperatures of 800–850?°C and pressures less than 6–9 kbar (lack of garnet). The abnormally high geothermal gradient (≈40?°C?km^?1) is probably due to the activity of the magmatic arc, which developed on the accreted oceanic terranes after Late Eocene times, and may have provoked the re-mobilisation of deeply underplated oceanic material during the genesis of the Neogene to Recent arc. To cite this article: É. Beaudon et al., C. R. Geoscience 337 (2005).  相似文献   

The boundary layer of the residence time field     

Éric J. M. Delhez  Éric Deleersnijder 《Ocean Dynamics》2006,56(2):139-150

The residence time of a tracer in a control domain is usually computed by releasing tracer parcels and registering the time when each of these tracer parcels cross the boundary of the control domain. In this Lagrangian procedure, the particles are discarded or omitted as soon as they leave the control domain. In a Eulerian approach, the same approach can be implemented by integrating forward in time the advection–diffusion equation for a tracer. So far, the conditions to be applied at the boundary of the control domain were uncertain. We show here that it is necessary to prescribe that the tracer concentration vanishes at the boundary of the control domain to ensure the compatibility between the Lagrangian and Eulerian approaches. When we use the Constituent oriented Age and Residence time Theory (CART), this amounts to solving the differential equation for the residence time with boundary conditions forcing the residence time to vanish at the open boundaries of the control domain. Such boundary conditions are likely to induce the development of boundary layers (at outflow boundaries for the tracer concentration and at inflow boundaries for the residence time). The thickness of these boundary layers is of the order of the ratio of the diffusivity to the velocity. They can however be partly smoothed by tidal and other oscillating flows.  相似文献   

A New Method to Determine the Derivatives of the Laplace Coefficients     

Áron Süli  Bálint Érdi  András Pál 《Celestial Mechanics and Dynamical Astronomy》2004,88(3):259-268

The determination of the secular variations of the orbital elements of objects in N-body systems is based on the literal development of the perturbing function. The development makes use of the Laplace coefficients and their derivatives. In this paper a new method is described for the analytical computation of the derivatives of the Laplace coefficients. It is an explicit formula in the sense that it only contains the Laplace coefficients and the parameter on which the Laplace coefficients depend. The advantage of this method is that it is unnecessary to calculate all the derivatives up to the desired order. It is enough to calculate the Laplace coefficients. Easy coding is a further benefit of the method and it provides more accurate numerical results. The paper describes in detail the application of the method through an example and gives comparison with former methods.This revised version was published online in October 2005 with corrections to the Cover Date.  相似文献   

Revisiting an old profile: an updated geoarchaeological study at Nasera Rockshelter (Tanzania)     

David Manuel MartÍn-Perea  JosÉ-Manuel MaÍllo-FernÁndez  Alicia Medialdea  Juan MarÍn  Irene Solano-MegÍas  Agness Gidna  Audax Mabulla 《第四纪科学杂志》2020,35(7):951-960

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