Perhaps you should try some spelling variations:
ventilation algorithms » estimation algorithms, estimation algorithm, convolution algorithms
optimizer algorithms » optimized algorithms, optimized algorithm, optimization algorithms
invasive ventilation » adaptive ventilation
modified adaptive » modified passive
modified invasive » modified passive

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 optimizer algorithms ) OR ( modified invasive ventilation algorithms ))~".
• Adding a wildcard symbol may retrieve word variants: (( modified adaptive optimizer algorithms ) OR ( modified invasive ventilation algorithms ))*.