Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm"
"modified df estimation algorithmssss" » "modified df estimation algorithm", "modified df estimation algorithmsss", "modified df optimization algorithmssss", "modified df optimisation algorithmsss", "modified _ estimation algorithmssss", "modified adam estimation algorithmssss", "modified bi1 estimation algorithmssss"

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