Perhaps you should try some spelling variations:
"modified notion optimization algorithms" » "modified notion optimisation algorithm", "modified notion estimation algorithm", "modified notion optimized algorithms", "modified network optimization algorithms", "modified policy optimization algorithms", "modified allocation optimization algorithms"
"verified network estimation algorithms" » "verified network estimation algorithm", "verified network optimisation algorithm", "verified network approximation algorithms", "verified network optimization algorithms", "certified network estimation algorithms", "defined network estimation algorithms"

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