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

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