%0 Journal Article %T Approximation by finite dimension linear systems in problems of quadratic exponential interpolation %A Sitnik, S.. %A Timashov, A.. %K interpolation, Gauss functions, nod functions, Jacobi theta-functions, signals %J Actual directions of scientific researches of the XXI century: theory and practice %D 2014 %N 2 %P 3 %I FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov