In this paper, there are four phases, such as Fig. 1, in the
expert finding system workflow. They are query extension, TFIDF
calculation, correlative calculation and list match. In the
first phase, the work is to extend queries that relate with the
origin query. In the second phase, the system calculates the
relation between all terms in the extended queries and
documents which are titles of experts’ publications. In the third
phase, the system calculates the correlative between extended