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

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