Perhaps you should try some spelling variations:
optimisation algorithms » optimisation algorithm, optimization algorithms, estimation algorithm
parameter optimisation » parameter optimization, parameter estimation
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
df estimation » _ estimation
modified df » modified _, modified adam, modified bi1

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 df estimation algorithms ) OR ( modified parameter optimisation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified df estimation algorithms ) or ( modified parameter optimisation algorithms ))*.