Perhaps you should try some spelling variations:
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
evolution algorithm » solution algorithm, evolutionary algorithm, convolution algorithms
passive estimation » pose estimation
learning evolution » learning convolution, learning emotion
modified learning » mobile learning, modified caging
modified passive » modified adaptive

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

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