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 changing estimation algorithms" » "modified changing estimation algorithm", "modified changing optimisation algorithm", "modified changing approximation algorithms", "modified channel estimation algorithms", "modified charging station algorithms", "modified caging estimation algorithms"

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