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The parameters of cosmological model with cold dark matter and cosmologicalconstant (Lambda CDM) have been determined on a basis of three-year cosmicmicrowave background observations by space mission WMAP, as well as the data onthe large-scale structure of the Universe. The data cover scales from 1 up to10000 Mpc. The best-fit values of LambdaCDM model parameters were found byminimization of chi^2 using the Levenberg-Markquardt approach(Omega_Lambda=0.736+-0.065, Omega_m=0.238+-0.080, Omega_b=0.05+-0.011, h=0.68+-0.09, sigma_8=0.73+-0.08 and n_s=0.96+-0.015). It is shown that the LambdaCDMmodel with these values of the parameters agrees well with the angular powerspectrum of cosmic microwave background and with power spectra of the densityperturbations, estimated from spatial distributions of galaxies, rich galaxyclusters and from statistics of Ly_alpha absorption lines in spectra of distantquasars as well. The accordance of modeled characteristics of the large-scalestructure with observable ones was analyzed, and possible reasons ofsignificant discrepancies between some of them were considered.

WMAP2006: Cosmological Parameters and Large-scale Structure of the Universe