Perhaps you should try some spelling variations:
"modified seird optimization algorithm" » "modified seird optimization algorithms", "modified seird optimisation algorithm", "modified seird estimation algorithm", "modified stage optimization algorithm", "modified network optimization algorithm", "modified near optimization algorithm"
"modified parameter estimation algorithmss" » "modified parameter estimation algorithms", "modified parameter estimation algorithm", "modified parameter optimization algorithms", "modified parameter estimates algorithmss", "modified parameter optimization algorithmss"

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