Perhaps you should try some spelling variations:
"modified robust optimisation algorithmss" » "modified robust optimization algorithms", "modified robust estimation algorithms", "modified robust estimation algorithm", "modified robust optimization algorithmsss", "modified robust estimation algorithmss", "modified robust estimation algorithmsss", "modified robust optimization algorithmss"
"modified bayesian optimisation algorithm" » "modified bayesian optimization algorithms", "modified bayesian estimation algorithm", "modified bayesian estimation algorithms", "modified bayesian optimization algorithm"

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