Perhaps you should try some spelling variations:
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
adaptive estimation » adaptive ventilation, quantile estimation, adaptive quantization
optimized algorithm » optimized algorithms, optimizer algorithms
modified adaptive » modified passive
df optimized » _ optimized, _ optimize
modified df » modified _, modified adam, modified bi1

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( modified adaptive estimation algorithms ) OR ( modified df optimized algorithm ))~".
• Adding a wildcard symbol may retrieve word variants: (( modified adaptive estimation algorithms ) OR ( modified df optimized algorithm ))*.