Perhaps you should try some spelling variations:
"modified pose optimization algorithms" » "modified pose optimisation algorithm", "modified pose estimation algorithm", "modified pose optimized algorithms", "modified qoe optimization algorithms", "modified game optimization algorithms", "modified response optimization algorithms", "modified male optimization algorithms", "modified passive 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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