Perhaps you should try some spelling variations:
"modified passive quantization algorithm" » "modified passive estimation algorithm", "modified adaptive quantization algorithm"
"modified df simulation algorithm" » "modified df estimation algorithm", "modified df solution algorithm", "modified df optimisation algorithm", "modified _ simulation algorithm", "modified a simulation algorithm", "modified 3d simulation algorithm", "modified adam simulation algorithm", "modified bi1 simulation algorithm"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified passive quantization algorithm\") OR (\"modified df simulation algorithm\"))~".
• Removing quotes may allow a broader search: (( modified passive quantization algorithm ) OR ( modified df simulation algorithm ))~.
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