Perhaps you should try some spelling variations:
process optimization » model optimization (Expand Search)
active optimization » acid optimization (Expand Search), objective optimization (Expand Search), reaction optimization (Expand Search)
choice process » whole process (Expand Search)
based active » based practice (Expand Search), based activity (Expand Search)
linac based » lines based (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( linac based active optimization algorithm ) OR ( binary choice process optimization algorithm ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( linac based active optimization algorithm ) OR ( binary choice process optimization algorithm ))".
• Adding a wildcard symbol may retrieve word variants: (( linac based active optimization algorithm ) OR ( binary choice process optimization algorithm ))*.