Dynamics of the coastal zone of the Kuibyshev and Saratov reservoirs in the Tolyatti area and its correlation with the operation regime of the Zhigulevskaya HPP     

A. V. Kotlyakov  E. M. Shumakova  S. A. Artem’ev 《Water Resources》2007,34(6):657-662

The negative effect of vibrations of the spillway dam of the Zhigulevskaya HPP on the oscillations of soils and shore deformations near Tolyatti Town is demonstrated on the basis of field observational data.  相似文献   

Single scattering approximation in the problem of transfer of polarized radiation     

V. M. Loskutov  Yu. A. Freimanis 《Astrophysics》1984,20(2):157-161

  相似文献   

Polarization in resonance lines: Diffuse reflection     

V. M. Loskutov 《Astronomy Reports》2004,48(1):21-28

The linear polarization of resonance radiation diffusely reflected from a semi-infinite atmosphere is analyzed, including a full account of the azimuthal dependence. The radiating atom is assumed to have two levels and the radiation to be fully redistributed in frequency. A new approach to the transformation of the equations of polarized radiative transport is proposed based on factorization of the full (3×3) Rayleigh phase matrix. The emergent radiation field is expressed in terms of a matrix analog for the Chandrasekhar H function. The polarization properties of radiation at the frequencies of resonance lines diffusely reflected from a scattering atmosphere are discussed. The degree of polarization of the reflected radiation can be very high.  相似文献   

A geophysical survey of the Spitsbergen Margin and surrounding areas     

Dmitry Baturin  Tatiana Fedukhina  Leo Savostin  Artem Yunov 《Marine Geophysical Researches》1994,16(6):463-484

New geophysical information including multichannel seismic profiling data obtained by the PGO Sevmorgeologia Ministry of Geology of the former USSR, Murmansk during 1984–1988 is discussed and interpreted in this study. The deep structure, sedimentary cover and stratigraphy of the Spitsbergen Continental Margin, considered to be a passive margin, i.e. divergent in the northern part and strike-slip in the western part, is described.Two genetically different types of plateaus on the continental margin, Yermak in the north and Spitsbergen (Vestnesa) in the west, have been identified.The entire extent of the continental slope of the northern part of the Spitsbergen Continental Margin in the Eurasia Basin is underlain by attenuated continental crust, while at the base of the Southwest Continental Margin, the oceanic crust along almost the entire extent is observed. The sedimentary cover, up to 10 km thick within the West Spitsbergen Continental Margin, is likewise observed. Within the North Spitsbergen Margin, however, it does not exceed 3.5 km in thickness.The extension and deposition within the West Spitsbergen Margin began in early Oligocene, while the rifting with accompanying sedimentation within the North Spitsbergen Continental Margin started probably in Early Cretaceous.  相似文献   

Debris flows of 28 June 2014 near the Arshan village (Siberia,Republic of Buryatia,Russia)   总被引：1，自引：0，他引：1  

Alena V. Kadetova  Artem A. Rybchenko  Elena A. Kozireva  Vadim A. Pellinen 《Landslides》2016,13(1):129-140

On 28 June 2014, high intensity rainfall resulted in seven simultaneous debris flows going down the slopes of the Tunka Ridge in the vicinity of Arshan village, which is a balneological and alpine resort (51° 54′ 31″ N, 102° 25′ 44″ E). The debris flows caused one life loss and several injuries, 112 buildings were damaged, and 15 were completely destroyed. The total volume of the transported deposits amounted to 3?×?10⁶ m³. Debris flows’ formation began with the failure of weak sediments in the hanging cirques. Similar phenomena had not been recorded in the study area for over 40 years. The article presents a complete picture of the event and analysis of geological, geomorphological, and meteorological conditions for debris flows formation, for which extreme local rainfall was the major cause.  相似文献   

High-pressure phase transformations of FeS: Novel phases at conditions of planetary cores     

Shigeaki Ono  Artem R. Oganov  John P. Brodholt  Lidunka Vo adlo  Ian G. Wood  Andriy Lyakhov  Colin W. Glass  Alexander S. Ct  G. David Price 《Earth and Planetary Science Letters》2008,272(1-2):481-487

Iron sulfide (FeS) was investigated using first-principles calculations up to a pressure of 400 GPa. A number of new phase transitions were found. An antiferromagnetic MnP-type structure, FeS II, was confirmed to be stable at low pressures, whereas at high pressures (40–135 GPa) we find a new stable phase, with a non-magnetic MnP-type structure, FeS VI. The observed first-order change in the cell shape between the two phases can be explained by the difference in magnetic configurations. The calculated cell parameters, atomic coordinates, and bulk modulus of non-magnetic MnP-type phase are consistent with those determined from experiment. The upper pressure limit of the stability of the non-magnetic MnP-type phase was calculated to be 135 GPa. A hitherto unsuspected phase transition from the non-magnetic MnP-type to a phase with Pmmn symmetry, FeS VII, was identified using the evolutionary crystal structure prediction (USPEX) method. The structure of the Pmmn phase has no known analogues, but can be described as a distortion of the NaCl-type structure. The Pmmn phase with the distorted NaCl-type structure is stable from 135 GPa at least up to 400 GPa. According to previous experiments and the present study, the transition sequence of FeS at low temperatures is as follows: troilite ➔ antiferromagnetic MnP-type phase ➔ monoclinic phase ➔ non-magnetic MnP-type phase ➔ Pmmn phase. The calculated volume reduction from the monoclinic to the non-magnetic MnP-type phase is 1.0% at 40 GPa, which is in good agreement with experimental observations. The calculated volume reduction from the non-magnetic MnP-type to the Pmmn phase is 3.7% at 135 GPa.  相似文献   

Optical characteristics of the Kara Sea derived from shipborne and satellite data     

V. I. Burenkov  Yu. A. Goldin  V. A. Artem’ev  S. V. Sheberstov 《Oceanology》2010,50(5):675-687

Results of optical studies of the Kara Sea waters are considered. The data of ship borne measurements are compared with satellite observations. The maximum values of the beam attenuation coefficient, the chlorophyll, and the yellow substance fluorescence were observed in the Ob gulf and in the coastal waters west of the Yamal Peninsula. The minimum values were observed in the central and western parts of the Kara Sea. Frontal zones with sharp changes of the parameters involved were observed. The distribution of the seawater’s optical characteristics was closely related to the hydrological structure of the Kara Sea’s waters. The data of the shipborne measurements were consistent with the satellite observations.  相似文献   

Polarized line formation by resonance scattering: Lorentz profile     

V. M. Loskutov  V. V. Ivanov 《Astrophysics》2007,50(2):157-174

Multiple resonance scattering of spectral line radiation is examined in atmospheres with uniformly distributed sources of unpolarized radiation. It is assumed that the profile of the absorption coefficient is lorentzian and that scattering involves complete frequency redistribution. The polarization characteristics of the emerging radiation are determined by iterative solution of a nonlinear Ambartsumyan-Chandrasekhar matrix integral equation. In particular, it is found that for pure scattering the maximum polarization at the limb of the disk is 5.421%. The polarization characteristics of the emerging radiation are compared for three different absorption profiles: Lorentz, Doppler, and rectangular (monochromatic radiation). __________ Translated from Astrofizika, Vol. 50, No. 2, pp. 199–217 (May 2007).  相似文献   

Simulation of triggering and geodeformation processes induced by fluid injection into the geomedium     

A. E. Zabolotin  A. V. Loskutov  A. V. Konovalov  S. B. Turuntaev 《Russian Journal of Pacific Geology》2016,10(6):417-426

A module for simulation of seismic and geodeformation processes when fluid is injected into and extracted from the geomedium is developed. Calculation of the stress–strain state of the geomedium involves a modified Biot model that takes the rate of bulk strain in the Darcy equation into account. For software implementation of the module simulating the processes during fluid motion in terms of the Biot model, we applied the OpenFOAM 2.4.0 free package of C++ libraries. This package is a set of compiled modules and their source codes; the latter encapsulate all of the most commonly used objects and operations from computational continuum mechanics in accordance with the principles of object-oriented programming. Development of the stress calculation module is based on the standard solver for elastic deformation of an isotropic body from the OpenFOAM package. Its code was supplemented with the procedure of discretization and solution of the Darcy equation for pore pressure. Geodeformation effects are estimated by direct calculation of free surface displacements near the sources of fluid injection and extraction; these displacements can lead, in particular, to dangerous subsidence and induced seismicity. Triggering seismic effects are estimated by calculation of the accumulation rate for excessive tangential stresses in a fault zone at the depth of the seismogenic layer (5–15 km), with the ratios linking the historical seismicity and the tectonic stress accumulation rate in terms of the modified Dietrich’s model being taken into account. Seismological validation of the possible maximum magnitudes of technogenic earthquakes and their recurrence periods in the NE Sakhalin region of intensive oil and gas development is performed. The models of seismic process activation during technogenic impacts on the geomedium are specified.  相似文献   

Tatarinovite Са<Subscript>3</Subscript>Al(SO<Subscript>4</Subscript>)[В(ОH)<Subscript>4</Subscript>](ОH)<Subscript>6</Subscript> · 12H<Subscript>2</Subscript>O,a new ettringite-group mineral from the Bazhenovskoe deposit,Middle Urals,Russia, and its crystal structure     

N. V. Chukanov  A. V. Kasatkin  N. V. Zubkova  S. N. Britvin  L. A. Pautov  I. V. Pekov  D. A. Varlamov  Ya. V. Bychkova  A. B. Loskutov  E. A. Novgorodova 《Geology of Ore Deposits》2016,58(8):653-665

A new mineral, tatarinovite, ideally Са₃Аl(SO₄)[В(ОН)₄](ОН)₆ · 12Н₂O, has been found in cavities of rhodingites at the Bazhenovskoe chrysotile asbestos deposit, Middle Urals, Russia. It occurs (1) colorless, with vitreous luster, bipyramidal crystals up to 1 mm across in cavities within massive diopside, in association with xonotlite, clinochlore, pectolite and calcite, and (2) as white granular aggregates up to 5 mm in size on grossular with pectolite, diopside, calcite, and xonotlite. The Mohs hardness is 3; perfect cleavage on (100) is observed. D _meas = 1.79(1), D _calc = 1.777 g/cm³. Tatarinovite is optically uniaxial (+), ω = 1.475(2), ε = 1.496(2). The IR spectrum contains characteristic bands of SO₄ ^2?, CO₃ ^2?, B(OH)₄ ^?, B(OH)₃, Al(OH)₆ ^3-, Si(OH)₆ ^2-, OH^–, and H₂O. The chemical composition of tatarinovite (wt %; ICP-AES; H₂O was determined by the Alimarin method; CO₂ was determined by selective sorption on askarite) is as follows: 27.40 CaO, 4.06 B₂O₃, 6.34 A1₂O₃, 0.03 Fe₂O₃, 2.43 SiO₂, 8.48 SO₃, 4.2 CO₂, 46.1 H₂O, total is 99.04. The empirical formula (calculated on the basis of 3Ca apfu) is H_31.41Ca_3.00(Al_0.76Si_0.25)_Σ1.01 · (B_0.72S_0.65C_0.59)Σ_1.96O_24.55. Tatarinovite is hexagonal, space gr. P6₃, a = 11.1110(4) Å, c = 10.6294(6) Å, V = 1136.44(9) A³, Z = 2. Its crystal chemical formula is Са₃(Аl_0.70Si_0.30) · {[SO₄]_0.34[В(ОН)₄]_0.33[СO₃]0.₂₄}{[SO₄]_0.30[В(ОН)₄]_0.34[СО₃]_0.30[В(ОН)₃]_0.06}(ОН_5·73О_0.27) · 12Н₂O. The strongest reflections of the powder X-ray diffraction pattern [d, Å (I, %) (hkl)] are 9.63 (100) (100), 5.556 (30) (110), 4.654 (14) (102), 3.841 (21) (112), 3.441 (12) (211), 2.746 (10) (302), 2.538 (12) (213). Tatarinovite was named in memory of the Russian geologist and petrologist Pavel Mikhailovich Tatarinov (1895–1976), a well-known specialist in chrysotile asbestos deposits. Type specimens have been deposited at the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow.  相似文献