We discuss the dependence of competition ability on uniqueness for the general cooperation-competition networks.An empirical investigation of the 15 real world systems is made.We find that the dependence varies with t...We discuss the dependence of competition ability on uniqueness for the general cooperation-competition networks.An empirical investigation of the 15 real world systems is made.We find that the dependence varies with the change of systems.Although most of the systems show positive tendency,we find that a special system shows negative one.The relationship between the heterogeneity indexes for the distributions of competition ability and uniqueness is also discussed analytically and empirically.展开更多
Recently, quantitative study on complex systems has become an attractive research area for physicists. Human scientific activity, including scientific paper publication, is an important complex system and therefore de...Recently, quantitative study on complex systems has become an attractive research area for physicists. Human scientific activity, including scientific paper publication, is an important complex system and therefore deserves an investigation. We present a simple model to describe the interaction between journals, authors and editorial board members. In the model the probabilities, with which a journal accepts papers from an author or invites him as an editorial board member, obey normal distributions. However, the most probable value of the latter distribution shifts such that the journal can have higher level authors being its editorial board members. The analytic derivation by the model is in rather good agreement with the empirical observation from the selected fifteen worldwide journals with different impact factors.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 10635040,70671089 and 10705023.
文摘We discuss the dependence of competition ability on uniqueness for the general cooperation-competition networks.An empirical investigation of the 15 real world systems is made.We find that the dependence varies with the change of systems.Although most of the systems show positive tendency,we find that a special system shows negative one.The relationship between the heterogeneity indexes for the distributions of competition ability and uniqueness is also discussed analytically and empirically.
基金Supported by the National Natural Science Foundation of China under grant Nos 10635040, 70671089 and 10705023.
文摘Recently, quantitative study on complex systems has become an attractive research area for physicists. Human scientific activity, including scientific paper publication, is an important complex system and therefore deserves an investigation. We present a simple model to describe the interaction between journals, authors and editorial board members. In the model the probabilities, with which a journal accepts papers from an author or invites him as an editorial board member, obey normal distributions. However, the most probable value of the latter distribution shifts such that the journal can have higher level authors being its editorial board members. The analytic derivation by the model is in rather good agreement with the empirical observation from the selected fifteen worldwide journals with different impact factors.
