Factors and mechanisms of chemical composition formation of saline lakes in West Mongolia     

Marina KOLPAKOVA  Stepan SHVARTSEV  Vitalyi ISUPOV  Sodov ARIUNBILEG  Alexander VLADIMIROV  Olga GASKOVA 《《地质学报》英文版》2014,88(Z1):142-144

正All the lakes are accumulative systems for the various chemical elements.However,the ratios of the elements in different lake types are very different.It is generally accepted that the composition of lake water determined by  相似文献   

New finding of the ancient whale <Emphasis Type="Italic">Basilosaurus</Emphasis> (Cetacea,Archaeoceti: Basilosauridae) in the Lower Don area     

N. P. Kalmykov 《Doklady Earth Sciences》2012,442(2):178-180

The taxonomy and stratigraphic location of new remains of an ancient whale (Basilosaurus) discovered on the western coast of the Tsymlyansk water reservoir are considered. The Kharkov Formation deposits containing these remains are described, and their age is substantiated. The Basilosaurus remains discovered in the Lower Don area indicate that in the Late Eocene the ocean covered the southern part of the Russian Platform almost entirely.  相似文献   

Estimation of expected inflow in the AB1 bed by GWI data on the basis of C/O logging     

G. A. Kalmykov  K. V. Korotkov  E. N. Yampolskaya  G. A. Akopyan  V. S. Belokhin 《Moscow University Geology Bulletin》2012,67(4):259-264

The expected inflow in the AB1 bed at the Samotlor deposit is estimated by GWI data on the basis of C/O logging. The terrigenous AB1 beds of the Varta arch consist of sandstone, clay, and intermediate varieties. The beds are distinguished by the high clay content of the rocks and frequent interstratification of major facies. The filtration properties of the complex polymictic reservoirs can be estimated only with the use of C/O logging. The investigation results, which correspond to the bed exploration data, are reported.  相似文献   

Investigation into the change of the porosity parameter during transition from laboratory to reservoir conditions     

R. A. Khamidullin  G. A. Kalmykov  D. V. Korost  D. A. Astashkin 《Moscow University Geology Bulletin》2009,64(3):196-199

The purpose of the investigation is to reveal the dependences of P _p = f(C _p) on reservoir conditions and the lithological composition of rocks. The samples were studied using a set of lithological-petrographic investigations. To obtain the dependences on thermobaric conditions, 90 samples of different porosities (C _p) of 15, 20, and 25% were collected. As a result, the general pattern of the change in the rock resistivity during the transition from atmospheric conditions of measuring to reservoir conditions was established. Dependences of porosity parameter P _p on porosity coefficient C _p were obtained for three values of formation water salinity and three reservoir conditions. The measurement errors of the porosity parameter P _p were calculated using dependences obtained under atmospheric conditions.  相似文献   

中国东北新生代火山活动与地热资源   总被引：2，自引：0，他引：2  

王锡魁  裘善文  宋长春  阿列克赛·库拉科夫  斯蒂潘·塔谢奇  埃弗吉尼·米亚斯尼科夫 《地质论评》1999,45(7):190-195

本文论述了中国东北新生代火山活动的时—空分布规律和温泉及热流高值区的空间分布特征,揭示了热流高值区和温泉分布区与新生代火山活动、裂谷运动和断裂活动的内在联系,特别强调了活动断裂对温泉和地热高异常区形成的控制作用。提出新生代火山活动区、裂谷盆地、断裂强烈活动区和大地震发生区,以及活化的古板块缝合带等地区,是最有利的地热资源勘探靶区。  相似文献   

Using multiple-accumulator CMACs to improve efficiency of the X part of an input-buffered FX correlator     

Stepan Lapshev  S. M. Rezaul Hasan 《Experimental Astronomy》2017,43(2):177-187

This paper presents the approach of using complex multiplier-accumulators (CMACs) with multiple accumulators to reduce the total number of memory operations in an input-buffered architecture for the X part of an FX correlator. A processing unit of this architecture uses an array of CMACs that are reused for different groups of baselines. The disadvantage of processing correlations in this way is that each input data sample has to be read multiple times from the memory because each input signal is used in many of these baseline groups. While a one-accumulator CMAC cannot switch to a different baseline until it is finished integrating the current one, a multiple-accumulator CMAC can. Thus, the array of multiple-accumulator CMACs can switch between processing different baselines that share some input signals at any moment to reuse the current data in the processing buffers. In this way significant reductions in the number of memory read operations are achieved with only a few accumulators per CMAC. For example, for a large number of input signals three-accumulator CMACs reduce the total number of memory operations by more than a third. Simulated energy measurements of four VLSI designs in a high-performance 28 nm CMOS technology are presented in this paper to demonstrate that using multiple accumulators can also lead to reduced power dissipation of the processing array. Using three accumulators as opposed to one has been found to reduce the overall energy of 8-bit CMACs by 1.4% through the reduction of the switching activity within their circuits, which is in addition to a more than 30% reduction in the memory.  相似文献   

Natural background and anthropogenic inputs of polycyclic aromatic hydrocarbons (PAH) in sediments of South-Western Barents Sea     

Stepan Boitsov  H.K.B. Jensen  Jarle Klungsyr 《Marine environmental research》2009,68(5):236-245

Polycyclic aromatic hydrocarbons (PAH) were measured in sediment cores from 13 locations in South-Western Barents Sea as part of a detailed study of the Norwegian seabed under the MAREANO program. The generally low PAH levels found, an average around 200 ng g⁻¹ dry weight for sum PAH, indicate low inputs of petroleum hydrocarbons to the marine environment in the area. Differences in PAH composition and various PAH ratios indicate a natural, mostly petrogenic origin of PAH in sediments from the open sea locations, while the fjord locations show higher pyrogenic PAH contents with an increase towards upper sediment layers, indicating low inputs from human activities. Petrogenic PAH levels increase in deeper sediments at open sea locations, also when normalised to total organic carbon (TOC) contents, suggesting natural leakages of oil-related hydrocarbons in the area.  相似文献   

Evolution of surge in the sea of finite depth under the effect of wave-wave interactions     

V. A. Kalmykov 《Physical Oceanography》1996,7(5):359-368

The wave-wave kinetic equation for surface gravity waves occurring in a deep sea and a sea of finite depth is solved numerically, using the Runge-Kutta technique. Spectral evolution was the result only of the waves’ being non-linear, without any contribution from wave generation and dissipation. The JONSWAP frequency spectra and the angular spectra of various widths were used to perform calculations. The existence of a steady angular wave spectrum, following its long evolution in a deep sea, has been confirmed here. For the sea of finite depth, a new result has been obtained. It exhibits the ‘focusing’ of the frequential and the angular spectra when the wavelength of a harmonic from the spectral maximum equals 2π, of the depth of the sea. With the depth further decreasing, the wave spectrum swiftly expands. The three-dimensional wave field in a deep sea becomes two-dimensional in the shallows. Translated by Vladimir A. Puchkin.  相似文献   

Uranium in Saline Lakes of Mongolia and Adjacent Areas     

Vitaly ISUPOV  SODOV Ariunbileg  Svetlana SHATSKAYA  Marina KOLPAKOVA  Ljudmila RAZVOROTNEVA  Alexander VLADIMIROV  Stepan SHVARTSEV  Leonid KUIBIDA  Sergey KRIVONOGOV  Ekaterina MOROZ 《《地质学报》英文版》2014,88(Z1):137-138

正1 Introduction Increasing demand for uranium raw materials for the nuclear industry has stimulated interest in non-traditional sources,including hydromineral ones[Qin,2009].Those are saline lakes located in the uranium ore districts.Accumulation of uranium in such lakes results from the leaching of uranium from the rocks by surface and ground  相似文献   

Find of the remains of the North American Ferinestrix (Carnivora,Mustelidae) in the Western Transbaikalian region     

Matishov  G. G.  Kalmykov  N. P. 《Doklady Earth Sciences》2011,440(2):1467-1469

Doklady Earth Sciences -  相似文献