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Comparison of Methods for Determining the Thermal Conductivity in Induction Heated Industrial Rotating Calenders

Urbanek P., Kucharski J., Frączyk A.

Image Processing & Communications

2012

Vol. 17, no. 4

307--312

In many technical applications it is necessary to know thermal diffusity and heat conduction in solids, liquids and gaseous. In case of solid bodies the experimental determination of those properties requires use of special laboratory stands which provides the appropriate initial and boundary conditions necessary to solve invert problems. In the paper two methods of determine thermal property of metals has been presented and discussed. First method is based on classical optimization methods and the second one by artificial neural network, which is trained with data from numerical model of investigated body. Both method were tested on real laboratory model.

Experimental Studies on Isonicotinato Zinc(II) Complex [Zn(C6H4NO2)2(H2O)4] and Density Functional Calculations

Zhao P., Jian F., Li C.

Polish Journal of Chemistry

2005

Vol. 79 / nr 6

1041-1046

Isonicotinato zinc(II) complex [Zn(C6H4NO2)2(H2O)4] has been synthesized by hydrothermal method and characterized by elemental analysis, electronic-spectra and thermogravimetric analysis. Density functional theory (DFT) method calculations of the structure, atomic charges distribution, electronic spectra, natural population analysis and the thermodynamic properties at different temperatures have been performed. The calculated results show the electronic transitions are mainly derived from the contribution of pi--pi* bands and the decomposition of the title compound should firstly occur at the bond of Zn-O, then at the bond of Zn-N, which agrees very well with the experimental data.