03-31U

The electronic conductivity in materials with narrow energy bands in generalized Hubbard model with correlated hopping of electrons at arbitrary temperature is calculated. The dependences of conductivity on doping, temperature change and deformation are investigated. The expressions for conductivity are found with use of the energy spectrum of strongly correlated electrons in a narrow band obtained by means of the method of generalized mean-field. The results of numerical calculation of the conductivity allow to interpret the experimental data for narrow-band systems with electron-hole asymmetry.