Determination of Emissions in the City by the Rate of Change in the Integral Content of Impurities in the Atmospheric Boundary Layer     

Zakharova  S. A.  Elansky  N. F.  Verevkin  Y. M.  Davydova  M. A. 《Doklady Earth Sciences》2022,504(1):326-331

Doklady Earth Sciences - A new approach to the problem of determining the density of emission fluxes of anthropogenic impurities from distributed urban sources by the rate of growth of the integral...  相似文献   

The non-uniform distribution of galaxies from data of the SDSS DR7 survey     

A. O. Verevkin  Yu. L. Bukhmastova  Yu. V. Baryshev 《Astronomy Reports》2011,55(4):324-340

We have analyzed the spatial distribution of galaxies from the latest release of the Sloan Digital Sky Survey of galactic redshifts (SDSS DR7), applying the complete correlation function (conditional density), two-point conditional density (cylinder), and radial density methods. Our analysis demonstrates that the conditional density has a power-law form for scales lengths 0.5–30 Mpc/h, with the power-law corresponding to the fractal dimension D = 2.2 ± 0.2; for scale lengths in excess of 30 Mpc/h, it enters an essentially flat regime, as is expected for a uniform distribution of galaxies. However, in the analysis applying the cylinder method, the power-law character with D = 2.0 ± 0.3 persists to scale lengths of 70 Mpc/h. The radial density method reveals inhomogeneities in the spatial distribution of galaxies on scales of 200 Mpc/h with a density contrast of two, confirming that translation invariance is violated in the distribution of galaxies to 300 Mpc/h, with the sampling depth of the SDSS galaxies being 600 Mpc/h.  相似文献