Perhaps you should try some spelling variations:
objective optimisation » objective optimization, multiobjective optimization
optimisation algorithm » optimization algorithms, estimation algorithm
estimation algorithms » estimation algorithm, optimization algorithms, approximation algorithms
network estimation » network optimization

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 objective optimisation algorithm ) OR ( defined network estimation algorithms ))~".
• Adding a wildcard symbol may retrieve word variants: (( modified objective optimisation algorithm ) OR ( defined network estimation algorithms ))*.