Perhaps you should try some spelling variations:
"modified rough approximation algorithm" » "modified rough approximation algorithms", "modified rough approximations algorithm", "modified one approximation algorithm"
"modified adaptive quantization algorithms" » "modified adaptive estimation algorithms", "modified adaptive optimization algorithms", "modified adaptive ventilation algorithms", "modified passive quantization algorithms"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified adaptive quantization algorithms") or ("modified rough approximation algorithm"))~.
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