Perhaps you should try some spelling variations:
"modified pulses optimisation algorithms" » "modified pulses optimization algorithms", "modified pulses estimation algorithms", "modified pulses estimation algorithm", "modified pulses optimization algorithmss", "modified pulses estimation algorithmss"
"modified objective optimisation algorithm" » "modified objective optimization algorithm", "modified multiobjective optimization algorithm", "modified objective optimization algorithms", "modified objective estimation algorithm", "modified objective estimation algorithms"

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