Perhaps you should try some spelling variations:
"modified adaptive optimization algorithms" » "modified adaptive optimisation algorithm", "modified adaptive estimation algorithms", "modified adaptive optimized algorithms", "modified objective optimization algorithms", "modified adaptive quantization algorithms", "modified static optimization algorithms"
"modified passive estimation algorithm" » "modified pose estimation algorithm"

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 passive estimation algorithm") OR ("modified adaptive optimization algorithms"))~.
• Removing quotes may allow a broader search: (( modified passive estimation algorithm ) or ( modified adaptive optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified passive estimation algorithm") or ("modified adaptive optimization algorithms"))*.