Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithm, optimized algorithms
estimation algorithms » estimation algorithm, optimisation algorithm, approximation algorithms
adaptive estimation » adaptive ventilation, quantile estimation, adaptive quantization
aging optimization » staffing optimization, game optimization
modified adaptive » modified passive
modified aging » modified caging

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 adaptive estimation algorithms ) OR ( modified aging optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified adaptive estimation algorithms ) or ( modified aging optimization algorithms ))*.