Perhaps you should try some spelling variations:
"representative parameters characterizes" » "representative parameters characterized", "representative parameters characterize", "representative parameters characterised"
"representation parameters characterization" » "presentation parameters characterization", "representation parameters characteristics"

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: (("representative parameters characterizes") OR ("representation parameters characterization"))~.
• Removing quotes may allow a broader search: (( representative parameters characterizes ) or ( representation parameters characterization ))~.
• Adding a wildcard symbol may retrieve word variants: (("representative parameters characterizes") or ("representation parameters characterization"))*.