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101.
102.
E. D. Syngaevskii Yu. V. Shchegol’kov G. Ch. Vichtozhents G. K. Khachatryan S. N. Petrova 《Lithology and Mineral Resources》2007,42(6):572-583
Regularities in the distribution of rare-earth and trace elements in organic matter depending on geological settings and geochemical processes are considered. The model of transformation of organic matter and redistribution of ore elements during oil generation and ore formation is discussed. 相似文献
103.
A review of the modern state of the lunar libration theory is presented. A significant progress in the lunar investigation is achieved due to the simultaneous processing of results of the satellite Doppler tracing and of the lunar laser ranging. The data evidencing existence of a small iron core in the Moon are discussed. In this connection, the further development of the theory of rotation of the Moon presents the study of internal structure and dynamics of a lunar body. A model of a two-layer Moon can have a very advanced application to explain some observed phenomena and to be as a first approach in the modelling of internal processes determining the lunar rotation. 相似文献
104.
A number of basalt samples containing titanomagnetites, with varying degrees and modes of oxidation, have been collected from 13 sites in northern Bulgaria, the degree of oxidation being determined from Curie point and lattice parameter determination. The stability of natural remanent magnetization and artificially induced thermoremanences (TRM) has been studied in an attempt to determine whether the oxidized rocks carry a TRM inherited from their original, unoxidized state. From the samples studied, it appears that the intensity and direction of the original TRM's are retained, but that there is some loss in stability. 相似文献
105.
We consider the polarization behaviour of radio waves propagating through an ultrarelativistic highly magnetized electron-positron
plasma in a pulsar magnetosphere. The rotation of magnetosphere gives rise to the wave mode coupling in the polarization-limiting
region. The process is shown to cause considerable circular polarization in the linearly polarized normal waves. Thus, the
circular polarization observed for a number of pulsars, despite the linear polarization of the emitted normal waves, can be
attributed to the limiting-polarization effect.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
106.
By using data mainly from Frolovet al. (1982) for four Delta Scuti stars in eclipsing binary systems, AB Cas, Y Cam, RS Cha, and AI Hya, their physical parameters, distances, and radial pulsation modes are determined. The evolutionary track systems of Iben (1967), Paczyski (1970), and Maeder and Meynet (1988) are interpolated, in order to estimate evolutionary massesM
eand agest of these variables. Their pulsation massesM
Qare estimated from the fitting formulae of Faulkner (1977) and Fitch (1981). Our estimates of evolutionary massesM
eand pulsation massesM
Qare close to the massesM determined by Frolovet al. (1982) from the star binarity. The only exception is AB Cas, for which there is no agreement between certain star parameters.Another, independent approach is also applied to the stars RS Cha and AI Hya: by using their photometric indicesb — y andc
1 from the catalogue of López de Cocaet al. (1990) and appropriate photometric calibrations, other sets of physical parameters, distances, modes, ages, evolutionary and pulsation masses of both variables are obtained. 相似文献
107.
Water Resources - Water pollution by heavy metals in Uglovoi Bay in 2015–2016 was analyzed. The concentrations of Mn, Fe, Cu, Ni, Hg, As, Pb, Cd, and oil products were found to exceed the... 相似文献
108.
109.
Doklady Earth Sciences - This paper discusses the influence of tropical cyclones (TCs) upon the Earth’s crust beneath the ocean bottom, which is associated with rapid variations of pressure... 相似文献
110.
The lightning activity and precipitation in two 3-hour time intervals in the grid boxes of 0.25 × 0.25° over East and Central Mediterranean during the summer of 2005 and 2006 are analysed. The results show that the frequency distribution of the precipitation amount is shifted towards larger values for the cases with lightning as compared with the cases without lightning. It was found that the number of cases with 3-hour accumulated rainfall greater than 10 mm was bigger when lightning occurred (65%) than when it was absent (35%). Investigation of diurnal and spatial distributions of lightning shows that the afternoon flash density peak is associated mainly with lightning over the land, which is in accordance with the results of earlier works. The early morning flash density peak is associated mainly with flashes over the sea. High correlation coefficients (0.89 during the morning hours and 0.98 during afternoon) were found between rain rate (mm/h) and average flash density (fl/km2) when flash density is averaged in logarithmic intervals of rain rate. 相似文献