Perhaps you should try some spelling variations:
"modified parameters optimization algorithms" » "modified parameter optimization algorithms", "modified parameter estimation algorithms", "modified parameters optimisation algorithm", "modified parameters estimation algorithm", "modified parameters optimized algorithms"
"defined network estimation algorithms" » "defined network estimation algorithm", "defined network optimisation algorithm", "defined network approximation algorithms", "defined network optimization algorithms", "designed network estimation algorithms"

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: "((\"defined network estimation algorithms\") OR (\"modified parameters optimization algorithms\"))~".
• Removing quotes may allow a broader search: (( defined network estimation algorithms ) OR ( modified parameters optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("defined network estimation algorithms") OR ("modified parameters optimization algorithms"))*.