NFO13018901 Intro Network science14307130355李婧雅 defection always has higher payoff and follows the evolutionary strategy but with the evolution there will be some cooperative behaviors. So far, five mechanisms have been put forward to explain it: Kin selection, Direct reciprocity, Indirect reciprocity, Group selection and Network reciprocity This article will focus on cooperative behaviors in evolutionary games on complex notworks and explore the impact network makes on it 2. Related elements Model, network structure and evolutionary rule are three factors of networked evolutionary game 2.1 model parameter 2.1.1 prisoners'dilemma Two men who cooperatively made a crime were put into prison. For better interrogation, the police have arranged them in different rooms so they cannot communicate with each other. If both of them choose to keep silent and dont admit the crime( Cooperation, C), the police will only impose a light sentence on them. In this situation, the payoff of the two is r(Reward). If one chooses to confess(Defection, D) but another chooses to resist, then the former will be discharged and get the payoff T (Temptation), the later will be given a sever judgment and have payoff S( Suckers). If the two both confess the crime, they will be both sentenced and get the payoff P(Punishment). Besides, the parameters have the relation: T>R>P>S and 2R>T+S. So we can get the payoff matrix C ((R, R)(S,T) (P,P) To the two people, if we regard them as a whole, they will have maximal payoff 2R when they both choose to resist. But for each individual, he will always make the choice which is best for himself from the rational thinking. We can see. if the otherINFO130189.01 Intro Network Science 14307130355 李婧雅 2 defection always has higher payoff and follows the evolutionary strategy but with the evolution there will be some cooperative behaviors. So far, five mechanisms have been put forward to explain it: Kin selection, Direct reciprocity, Indirect reciprocity, Group selection and Network reciprocity. This article will focus on cooperative behaviors in evolutionary games on complex notworks and explore the impact network makes on it. 2. Related elements Model, network structure and evolutionary rule are three factors of networked evolutionary game. 2.1 model & parameter 2.1.1 prisoners’ dilemma Two men who cooperatively made a crime were put into prison. For better interrogation, the police have arranged them in different rooms so they cannot communicate with each other. If both of them choose to keep silent and don’t admit the crime(Cooperation, C), the police will only impose a light sentence on them. In this situation, the payoff of the two is R (Reward). If one chooses to confess(Defection, D) but another chooses to resist, then the former will be discharged and get the payoff T (Temptation), the later will be given a severe judgment and have payoff S (Suckers). If the two both confess the crime, they will be both sentenced and get the payoff P (Punishment). Besides, the parameters have the relation: T>R>P>S and 2R>T+S. So we can get the payoff matrix: C D D C    ( , ) ( , ) T S R R    ( , ) ( , ) P P S T To the two people, if we regard them as a whole, they will have maximal payoff 2R when they both choose to resist. But for each individual, he will always make the choice which is best for himself from the rational thinking. We can see, if the other