Perhaps you should try some spelling variations:
"modified quantile optimization algorithms" » "modified quantile optimisation algorithm", "modified quantile estimation algorithm", "modified quantile optimized algorithms", "modified quantile estimation algorithms", "modified quadratic optimization algorithms", "modified static optimization algorithms", "modified adaptive optimization algorithms"
"modified passive estimation algorithms" » "modified passive estimation algorithm", "modified passive optimisation algorithm", "modified passive approximation algorithms", "modified pose estimation algorithms", "modified adaptive estimation algorithms"

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