Presence of π−1 mesons in heavy atomic nuclei     

L. Sh. Grigoryan  G. S. Saakyan 《Astrophysics》1977,13(3):260-265

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Star-calibrated lunar photography by method of separate plates for a determination of the coordinates of lunar control points     

Sh. T. Habibullin  N. G. Rizvanov  N. F. Bystrov 《Earth, Moon, and Planets》1974,11(1-2):125-136

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Radial velocities of the components of multiple star systems of Trapezium type. I     

G. Sh. Dzhavakhishvili  M. V. Pavlov  G. N. Salukvadze 《Astrophysics》1993,36(2):168-169

Translated fromAstrofizika, Vol. 36, No. 2, pp. 273–275, April–June 1993.  相似文献   

Flare stars in the Pleiades. VI     

L. V. Mirzoyan  O. S. Chavushyan  G. B. Oganyan  V. V. Ambaryan  A. T. Garibdzhanyan  N. D. Melikyan  R. Sh. Natsvlishvili 《Astrophysics》1981,17(1):38-47

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Generalized bimetric theory of gravitation     

L. Sh. Grigoryan  A. A. Saaryan 《Astrophysics》1989,31(2):625-632

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Relative deformations of selenodetic nets of coordinates     

Sh. T. Habibullin  Yu. A. Chikanov  V. S. Kisliuk 《Earth, Moon, and Planets》1972,3(4):371-385

One of the main problems of selenodesy consists of the construction of a net of basic reference points on the surface of the Moon. At present there exist many catalogues containing the coordinates of selected objects on the Moon. These catalogues differ by the presence of both systematic and accidental errors.The investigations concerning the comparison of catalogues and the elucidation of their systematic differences are of very recent date. Various methods of interpretation of the systematic differences between catalogues have been proposed. Without an attempt to encompass the whole problem in what follows, we shall describe one method for comparative study of catalogues based on the theory of the deformation of continuous media.  相似文献   

N–S Asymmetry in the Solar Differential Rotation During 1957–1993     

M.?Sh.?GigolashviliEmail author  D.?R.?Japaridze  T.?G.?Mdzinarishvili  B.?B.?Chargeishvili 《Solar physics》2005,227(1):27-38

The properties of the differential rotation of the Sun are investigated by using H filaments as tracers. Annual average angular velocities of 716 quiescent filaments are determined from H photoheliograms of the Abastumani Astrophysical Observatory film collection for the years 1957–1993. The existence of north-south (N–S) asymmetry in H filaments rotation is confirmed statistically. The connection of asymmetry with the solar activity cycles is established. It is found that the northern hemisphere rotates faster during the even cycles (20 and 22) while the rotation of southern hemisphere dominates in odd ones (cycles 19 and 21). The mechanism of the solar activity should be responsible for the N–S asymmetry of the solar differential rotation. A theoretical explanation for the N–S asymmetry in the Suns rotation is offered. It is suggested that the asymmetry in the rotation of the two hemispheres of the Sun is balanced by the dynamo mechanism, which acts in parallel to the mechanism offered here. It is concluded that the N–S asymmetry of the solar rotation should cause a difference in activity level between the northern and southern hemispheres.  相似文献   

Independent selenocentric system of coordinates by large-scale star-calibrated lunar photography     

Sh. T. Habibullin  N. G. Risvanov 《Earth, Moon, and Planets》1984,30(1):1-19

The selenocentric coordinates of 263 craters and one mountain are given. The scale and orientation of the selenocentric coordinates system is determined by star-calibrated lunar photographs obtained with the long-focus horizontal telescope. The origin of the system is defined by the theory of the motion of the Moon. The physical libration is taken into account for the reduction of the coordinates system to the principal axes of the lunar inertia. The reference stars coordinates are reduced to the FK4 system. The position of the lunar mass centre is determined by LURE-2 theory, the rotation parameters are taken from the Migus tables (Migus, 1980).  相似文献   

Two metamorphic stages in the Svecofennian domain: Evidence from the isotopic geochronological study of the Ladoga and Sulkava metamorphic complexes     

Sh. K. Baltybaev  O. A. Levchenkov  L. K. Levsky  O. Eklund  T. Kilpeläinen 《Petrology》2006,14(3):247-261

The Ladoga, Russia, and adjacent Sulkava, southeastern Finland, metamorphic complexes are the two largest “granulite” provinces of the Svecofennian domain. In this area, the domain is composed of outer and inner zones. Sulkava is situated in the inner zone, which principally can be compared to the accretionary arc complex of Southern Finland. Ladoga is situated in the outer zone, which is correlated with the accretionary arc complexes of central and Western Finland. The complexes contain different metamorphic assemblages, which are caused by the different composition of the sedimentary protoliths: the rocks of the Sulkava metamorphic complex are higher in Al and K than those of the Ladoga Complex. Pb-Pb step leaching dating was used to determine the age of prograde sillimanite from both complexes. The dates thus obtained constrain metamorphic peaks for the Sulkava and Ladoga complexes at 1799 ± 19 Ma and 1878 ± 7 Ma, respectively, which is consistent with the U-Pb monazite ages of gneisses from both of the complexes. The differences in the ages of the metamorphic minerals from these complexes reflect the Early Svecofennian (1.89–1.86 Ga) and Late Svecofennian (1.83–1.79 Ga) metamorphic stages in the Fennoscandian Svecofennides.  相似文献   

偏硼酸锂溶液物种分布和物化性质          下载免费PDF全文

许沙  房艳  房春晖  周永全  朱发岩  陶松 《盐湖研究》2012,20(3):37-42

测量了不同浓度LiBO2溶液分别在298.15和323.15 K的密度、电导和pH,通过测得的pH和硼酸根离子化学平衡常数计算得到溶液中硼酸根离子的物种分布。根据获得的物种分布结果,推测溶液中各硼酸根离子之间的相互转化过程,并分别用偏摩尔体积公式和Onsager方程对溶液偏摩尔体积及摩尔电导率进行计算并拟合。对计算得到偏摩尔体积值和极限摩尔电导率值与文献报道的数据进行对比,计算结果与文献报道值吻合较好。  相似文献