Evolutionary Prisoners' Dilemma Game on Scale-Free Networks with Degree-Degree Correlation

Degree-degree correlation and heterogeneity in degree are important topological properties characterizing scale-free networks. We consider an evolutionary prisoners＇ dilemma game on scale-free networks and investigate how degree-degree correlation influences cooperation. It is found that the cooperator frequency displays resonance-like behavior with the variation of Pearson correlation coefficient. A measure on local heterogeneity in a network is proposed and it is realized that cooperation is proportional to the local heterogeneity.     

Evolutionary Prisoner＇s Dilemma on a Weighted Scale-Free Network

We investigate the evolutionary prisoner＇s dilemma on a weighted scale-free network where the diversity of teaching ability is introduced to the network in the form of weight. Though the diversity of teaching ability is not a sufficient condition for the enhancement of cooperation, we find that the degree-dependent teaching ability plays an active role in the evolution of cooperation. A new phenomenon is found when the degree-dependent teaching ability is used： the distribution of the cooperator frequency displays a two-peak structure for a certain parameter range. We also investigate the effects of the degree-degree correlation of the network on the evolution of cooperation in the presence of the diversity of the teaching ability.     

Effects of Degree on Cooperation in Evolutionary Prisoner's Dilemma Games on Structured Populations

We focus on the effects of individuals＇ degrees on spontaneous cooperation. By investigating evolutionary PDGs on random networks with two distinct degrees, we find some resonance-type behaviors of the cooperator frequency with the variation of degree. We also find that increasing hums degree actually disfavors the cooperation though the heterogeneity in degree can enhance cooperation in the population.     

C60衍生物修饰的固体支撑双分子层磷脂膜(s-BLM)分子器件的电化学和拉曼光谱研究

本文配合拉曼光谱技术比较了以不同的C60衍生物修饰的固体支撑双分子层磷脂膜（s-BLM)分子器件体系对I^-的检测灵敏度，结果表明，一些衍生物可使s-BLM体系对I^-的检测灵敏度进一步提高，显示了C60衍生物在BLM分子器件中良好的应用前景。