Perhaps you should try some spelling variations:
quantization algorithm » estimation algorithm
adaptive quantization » adaptive ventilation
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
modified adaptive » modified passive
aging estimation » lighting estimation, risk estimation
modified aging » modified caging

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( modified adaptive quantization algorithm ) OR ( modified aging estimation algorithms ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( modified adaptive quantization algorithm ) OR ( modified aging estimation algorithms ))".
• Adding a wildcard symbol may retrieve word variants: (( modified adaptive quantization algorithm ) OR ( modified aging estimation algorithms ))*.