Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm"
"modified pulses optimized algorithms" » "modified pulses optimized algorithm", "modified pulses optimizer algorithms", "modified pulses optimization algorithms", "modified pulse optimized algorithms", "modified pulsed optimized algorithms"

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• Removing quotes may allow a broader search: (( modified pulses optimized algorithms ) OR ( modified multiobjective estimation algorithms ))~.
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