1 research outputs found
Research on Fitness Function of Two Evolution Algorithms Used for Neutron Spectrum Unfolding
When evolution algorithms are used to unfold the neutron energy spectrum,
fitness function design is an important fundamental work for evaluating the
quality of the solution, but it has not attracted much attention. In this work,
we investigated the performance of eight fitness functions attached to the
genetic algorithm (GA) and the differential evolution algorithm (DEA) used for
unfolding four neutron spectra selected from the IAEA 403 report. Experiments
show that the fitness functions with a maximum in the GA can limit the ability
of the population to percept the fitness change, but the ability can be made up
in the DEA. The fitness function with a feature penalty term helps to improve
the performance of solutions, and the fitness function using the standard
deviation and the Chi-squared result shows the balance between the algorithm
and the spectra. The results also show that the DEA has good potential for
neutron energy spectrum unfolding. The purposes of this work are to provide
evidence for structuring and modifying the fitness functions and to suggest
some genetic operations that should receive attention when using the fitness
function to unfold neutron spectra.Comment: 12 pages,5 figure