supported by the the National Natural Science Foundation of China (Grant Nos. 60973136,61073164);the China-British Columbia Innovation and Commercialization Strategic Development (Grant No.2008DFA12140);Graduate Innovation Fund of Jilin University (Grant No. 20101029);the Fundamental Research Funds for Jilin University (Grant No. 201103136);the Europe Cooperation Project (Grant No. 155776-EM-1-2009-1-IT-ERAMUNDUS-ECW-L12)
Functions and call relations are extracted into nodes and edges, respectively, by which a novel topological model is proposed. The directional edges and the corresponding weight values express the call relations and t...