Perhaps you should try some spelling variations:
segmentation techniques » augmentation techniques
imputation techniques » implantation technique, augmentation techniques, floatation technique
sensor segmentation » series segmentation, semantic segmentation
n imputation » _ computation, _ reputation
gas sensor » gas sensors
based n » based _, based k, based no2

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( learning-gas sensor segmentation techniques ) OR ( learning-based n imputation techniques ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( learning-gas sensor segmentation techniques ) OR ( learning-based n imputation techniques ))".
• Adding a wildcard symbol may retrieve word variants: (( learning-gas sensor segmentation techniques ) OR ( learning-based n imputation techniques ))*.