Perhaps you should try some spelling variations:
"modified passive quantization algorithm" » "modified passive estimation algorithm", "modified adaptive quantization algorithm"
"modified response estimation algorithms" » "modified response estimation algorithm", "modified response optimization algorithms", "modified response optimisation algorithm", "modified pose estimation algorithms", "modified response association algorithms"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified response estimation algorithms") OR ("modified passive quantization algorithm"))~.
• Removing quotes may allow a broader search: (( modified response estimation algorithms ) or ( modified passive quantization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified response estimation algorithms") or ("modified passive quantization algorithm"))*.