Perhaps you should try some spelling variations:
"modified bi1 optimisation algorithm" » "modified bi1 optimization algorithms", "modified bi1 estimation algorithm", "modified bi1 estimation algorithms", "modified _ optimisation algorithm", "modified _ optimization algorithm", "modified qoe optimization algorithm"
"modified parameters estimation algorithmss" » "modified parameters estimation algorithms", "modified parameters estimation algorithm", "modified parameters optimization algorithms", "modified parameter estimation algorithmss", "modified parameter estimates algorithmss", "modified parameter optimization algorithmss"

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