Perhaps you should try some spelling variations:
ventilation algorithms » estimation algorithm, convolution algorithms
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
invasive ventilation » adaptive ventilation
modified invasive » 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified invasive ventilation algorithms ) OR ( modified aging estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified invasive ventilation algorithms ) or ( modified aging estimation algorithms ))*.