Free Access
Fig. 4.

Download original image
Sketch of four possible scenarios for the XM algorithm. Case 1: one to one match for isolated sources. Case 2: two stars have the same match which in most cases it is a duplicated source. Case 3: the best match is selected from a neighbourhood. Case 4: wrong match possibly because the right one is missing.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.