What do A pos and C pos mean?
The # column is the rank of each listed entry for Electrochemical and Solid-State Letters — rank 1 means this entry is where Electrochemical and Solid-State Letters has the most articles or citations. A pos and C pos show the reciprocal: the position of Electrochemical and Solid-State Letters within that entry's own ranked list, by articles and citations respectively. A low value means Electrochemical and Solid-State Letters is among the most prominent contributors for that entry.