Perhaps you should try some spelling variations:
objective optimisation » objective optimization, multiobjective optimization
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
evolution algorithm » solution algorithm, evolutionary algorithm, convolution algorithms
df evolution » _ evolution, co evolution
modified df » modified _, modified adam, modified bi1

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• Performing a fuzzy search may retrieve terms with similar spellings: (( modified df evolution algorithm ) OR ( modified objective optimisation algorithm ))~.
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