Perhaps you should try some spelling variations:
"modified network optimisation algorithms" » "modified network optimisation algorithm", "modified network estimation algorithms", "modified network estimation algorithm", "modified network optimization algorithms", "certified network optimisation algorithms", "defined network optimisation algorithms", "modified near optimisation algorithms"
"modified parameters optimization algorithms" » "modified parameter optimization algorithms", "modified parameter estimation algorithms", "modified parameters optimisation algorithm", "modified parameters estimation algorithms", "modified parameters estimation algorithm"

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