Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm", "modified multiobjective approximation algorithms"
"modified pulse optimization algorithms" » "modified pulse optimisation algorithm", "modified pulse estimation algorithm", "modified pulse optimized algorithms", "modified policy optimization algorithms", "modified game optimization algorithms", "modified qoe optimization algorithms", "modified male optimization algorithms", "modified passive optimization algorithms"

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