On the territorial differences in chain organisation of retail in the Russian Federation
The relatively rapid – however slower than forecasted — development o retail chains is characteristic of Russia in general, nevertheless it exhibits significant territorial differences. An attempt to identify the factors behind these differences through calculating the correlation coefficient made it possible to detect only one factor, whose value is close to essential: the geographical remoteness from Moscow. However, many ...
An mathematical simulation of ionosphere with due regard for its three-dimensional irregularity
Difference methods an approximate solution of a three-dimensional equation of ions diffusion with mixed derivatives and divergence first derivatives are considered. The task is reduced to a chain of three two-dimensional parabolic equations on base of ...
A finite differences approximation of the boundary value problem of a heat convection in the ladle with steel
... convective heat transfer in a ladle while blowing steel argon proposed finite-difference approximation of the original mathematical model of convective heat transfer in a continuous divergence form. Used stable and economical implicit monotone conservative difference scheme.
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