Perhaps you should try some spelling variations:
"modified multiobjective optimisation algorithm" » "modified multiobjective optimization algorithm", "modified objective optimization algorithm", "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm"
"modified changing estimation algorithms" » "modified changing estimation algorithm", "modified changing optimization algorithms", "modified changing approximation algorithms", "modified channel estimation algorithms", "modified charging station algorithms", "modified caging estimation algorithms"

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