Perhaps you should try some spelling variations:
"modified invasive optimisation algorithms" » "modified invasive optimization algorithms", "modified invasive estimation algorithms", "modified invasive estimation algorithm", "modified invasive optimization algorithmss", "modified invasive estimation algorithmss", "modified passive optimisation algorithms"
"modified adaptive optimisation algorithm" » "modified adaptive optimization algorithms", "modified adaptive estimation algorithm", "modified adaptive estimation algorithms", "modified passive optimisation algorithm"

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