Perhaps you should try some spelling variations:
the preprocessing » the processing (Expand search), their processing (Expand search), image preprocessing (Expand search)
faster decreases » faster decrease (Expand search), water decreases (Expand search), system decreases (Expand search)
decrease faster » decrease after (Expand search), decrease further (Expand search), decreased after (Expand search)
decrease α » decrease _ (Expand search), decrease β (Expand search), decrease in (Expand search)
α decrease » _ decrease (Expand search), to decrease (Expand search), of decrease (Expand search)
decrease on » decrease in (Expand search), decrease of (Expand search), decrease or (Expand search)
on decrease » on decreased (Expand search), of decrease (Expand search), or decrease (Expand search)

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: "(( decrease faster decreases the preprocessing ) OR ( decrease α decrease on decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease faster decreases the preprocessing ) OR ( decrease α decrease on decrease ))*.