Perhaps you should try some spelling variations:
quantization algorithms » estimation algorithms
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
passive quantization » adaptive quantization
near optimization » network optimization, stage optimization, _ optimization
modified passive » modified adaptive
modified near » modified seird, modified adam

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• Performing a fuzzy search may retrieve terms with similar spellings: (( modified passive quantization algorithms ) or ( modified near optimization algorithms ))~.
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