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

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