In the ranking list of journals and conferences, the number of citations should be devided by the publications number of that journal (or conference), then we can get the impact factor (IF) of that journal/conference, and the rank
should be based on this IF.
For example, one journal A has a total citations 60000, and it published 20000 papers; another journal B has a citations 50000, but it published only 3000 papers, so the 50000 citations are obtained by its 3000 papers. We can
see that journal B is much better than journal A (although journal A's citations are more than journal B).