Bulg. J. Phys. vol.17 no.5 (1990), pp. 407-418


Examination of Different Nonlinear Algorithms for X-Ray Processing with Personal Computers

K.N. Stoev, M.K. Vutchkov, E.L. Nikolova
Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 72 Lenin blvd, Sofia 1784
Abstract. The applicability of different nonlinear least square methods (gradient Fletcher-Reeves, Davidson-Fletcher-Powell. Marquardt, Hooke-Jeeves) for X-ray spectra processing was tested. Convergence and calculation efficiency of the different algorithms and their reproducibility in real X-ray spectra processing were evaluated. The results from standard tests with different programs were compared with the results of the KATOK code.

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