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  1. No Access

    Article

    Using a stochastic basis in signal and image recovery problems

    This paper touches upon the problems of constructing a basis for stochastic functions, which represent samples of random numbers with a given distribution law. The algorithm for constructing an approximation m...

    V. I. Batishchev, I. I. Volkov, A. G. Zolin in Optoelectronics, Instrumentation and Data … (2017)

  2. No Access

    Article

    Probabilistic Neural Networks with Macrolayers in Systems for Support of Decision-Making in Differential Diagnosis of Cardiovascular Diseases

    Probabilistic neural networks with macrolayers are used in systems for support of decision-making in differential diagnosis of cardiovascular diseases. The neural network contains two macrolayers. Macrolayer 1...

    A. A. Burmaka, I. I. Volkov, V. A. Ivanov, V. I. Serebrovskiy in Biomedical Engineering (2013)

  3. No Access

    Article

    Estimation of secular density variations in the upper atmosphere from 1964–2007 satellite drag data

    Orbital parameters of several artificial satellites of the Earth were analyzed for 1964–2007 and secular variations of the atmospheric density were estimated for the last 30–40 years. The analysis was based on...

    I. I. Volkov, A. I. Semenov, V. V. Suevalov in Solar System Research (2011)

  4. No Access

    Article

    Bottom sediments of Kandalaksha Bay in the White Sea: The phenomenon of Mn

    The redox stratification of bottom sediments in Kandalaksha Bay, White Sea, is characterized by elevated concentrations of Mn (3–5%) and Fe (7.5%) in the uppermost layer, which is two orders of magnitude and o...

    A. G. Rozanov, I. I. Volkov in Geochemistry International (2009)

  5. No Access

    Article

    Analysis of thermospheric density variations neglected in modern atmospheric models using accelerometer data

    The accuracy of the atmospheric density and its spatiotemporal variations given by the NRLMSISE-00 atmosphere model at the solar minimum are estimated using density measurements of the CACTUS microacceleromete...

    I. I. Volkov, A. I. Semenov, V. V. Suevalov in Solar System Research (2008)

  6. No Access

    Article

    Chemical and isotopic uniformity of the bottom convective water layer in the Black Sea

    I. I. Volkov, M. N. Rimskaya-Korsakova, V. A. Grinenko in Doklady Earth Sciences (2007)

  7. No Access

    Article

    Fundamentals of biohydrochemistry of anoxic basins

    The formation of hydrogen sulfide waters in three anoxic basins—the Black Sea, the Cariaco trench, and the Framvaren fjord—is considered. The accumulation of H2S caused by the oxidation of organic matter (OM) wit...

    I. I. Volkov, A. G. Rozanov in Oceanology (2006)

  8. No Access

    Article

    Managanese and iron in the White Sea: Sedimentation and diagenesis

    Iron and manganese in bottom sediments studied along the sublatitudinal transect from Kandalaksha to Arkhangelsk are characterized by various contents and forms depending on sedimentation environments, grain s...

    A. G. Rozanov, I. I. Volkov, N. M. Kokryatskaya… in Lithology and Mineral Resources (2006)

  9. No Access

    Article

    Estimation of lunar and solar tides in the Earth’s thermosphere from density measurements by the CACTUS microaccelerometer

    The densities measured by the CACTUS microaccelerometer at altitudes from 270 to 600 km are used to analyze the effect of tidal perturbations in the Earth’s thermosphere caused by the gravitational attraction ...

    I. I. Volkov, V. V. Suevalov in Solar System Research (2006)

  10. No Access

    Article

    Estimation of long-term density variations in the upper atmosphere of the earth at minimums of solar activity from evolution of the orbital parameters of the earth’s artificial satellites

    Long-term data on the evolution of the parameters of motion of 15 artificial satellites of the Earth in orbits with minimal heights of 400–1100 km were used to study the density variations in the upper atmosph...

    I. I. Volkov, V. V. Suevalov in Solar System Research (2005)

  11. No Access

    Article

    Compounds of Reduced Inorganic Sulfur in the Waters of the White Sea and the Northern Dvina Mouth

    The occurrence and distribution of reduced inorganic sulfur compounds in the waters of the White Sea and the Northern Dvina mouth are studied. Universal occurrence of micro-quantities of the above compounds in...

    I. I. Volkov, N. M. Kokryatskaya in Water Resources (2004)

  12. No Access

    Article

    Sulfur Compounds in Bottom Sediments of Fresh-Water Basins (Mouth of the Severnaya Dvina River and Rybinsk Water Reservoir)

    Composition and distribution of different forms of sulfur in bottom sediments of the Severnaya Dvina River mouth and Rybinsk water reservoir are studied. The sediments are characterized by low accumulation rat...

    N. M. Kokryatskaya, I. I. Volkov, T. P. Demidova… in Lithology and Mineral Resources (2003)

  13. No Access

    Article

    Sulfuric Compounds in the Surface Layer of Bottom Deposits in the Mouth Reach of the Northern Dvina River

    The distribution of reduced sulfuric compounds in the surface layer of bottom deposits in the Northern Dvina mouth was examined. The natural biogeochemical processes and anthropogenic pollution are found to ca...

    N. M. Kokryatskaya, A. F. Troyanskaya, I. I. Volkov in Water Resources (2000)

  14. No Access

    Chapter

    I

    The three-dimensional space that is the orbit space of the action of the binary icosahedron group on the three-dimensional sphere. It was discovered by H. Poincaré as an example of a homology sphere of genus 2...

    L. V. Kuz’min, T. S. Fofanova, M. Sh. Tsalenko… in Encyclopaedia of Mathematics (1995)

  15. No Access

    Chapter

    K

    An invariant of cohomology type associated with schemes in algebraic K-theory.

    V. V. Shekhtman, M. I. Voĭtsekhovskiĭ, D. V. Anosov… in Encyclopaedia of Mathematics (1995)

  16. No Access

    Chapter

    M

    Editorial comments. A discrete-time stochastic process (X n ) n∈z is m-dependent if for all k the joint stochastic variables (X

    V. I. Pagurova, D. D. Sokolov, S. S. Marchenko… in Encyclopaedia of Mathematics (1995)

  17. No Access

    Chapter

    A

    One of the generalizations of the Lebesgue integral, given by E. Titchmarsh [1] for the integration of functions conjugate to summable ones. A measurable function f(x) is called A-integrable over [a,b] if ...

    I. A. Vinogradova, A. G. El’kin, Yu. V. Prokhorov… in Encyclopaedia of Mathematics (1995)

  18. No Access

    Chapter

    D

    δ-σ-OPERATION - A set-theoretic operation, the result of its application to a sequence (E n ) of sets can be noted thus:

    A. G. El’kin, M. G. M. van Doorn, A. K. Gushchin… in Encyclopaedia of Mathematics (1995)

  19. No Access

    Chapter

    H

    Algebras with one ternary operation that satisfies certain identities.

    V. N. Saliĭ, F. P. Vasil’ev, S. V. Matveev, A. N. Parshin… in Encyclopaedia of Mathematics (1995)

  20. No Access

    Chapter

    C

    X 2-DISTRIBUTION - See ‘Chi-squared’ distribution.

    A. I. Shtern, B. A. Efimov, S. Yu. Maslov, V. A. Dushskiĭ… in Encyclopaedia of Mathematics (1995)

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