@techreport{oai:ipsj.ixsq.nii.ac.jp:00073960,
 author = {糸井, 良太 and 田中, 美栄子 and Ryota, Itoi and Mieko, Tanaka-Yamawaki},
 issue = {4},
 month = {May},
 note = {進化型 IPD に基くマルチエージェント人工社会において，戦略を2値文字列として遺伝子のように扱い，複写変異と点変異により戦略長をより長く進化させていくと，各エージェンントが強調し合う共存社会の出現するケースが見つかった．このような共存社会は長期に渡って続くものではないが，シミュレーションの途中でかなりの期間安定に存在できていた．この期間における戦略のを調べると，そのエントロピーは安定に増大しており，多様性の高い戦略分布を示していた．また，この時の主流となっている戦略の性質を調べると，友好性・寛容性・柔軟性の高い，「心の優しい」 戦略が多いことがわかった．, In a multi-agent model of the artificial society based on evolutional IPD, namely, the iterated prisoner's dilemma game with evolving genes, we construct a model by dealing with prisoner's strategy as binary strings, regarding the strategies as chromosomes, and let their length double and change it by a site mutation. In the study of this model by simulation, we have found a state of cooperative society. Although such a state does not prolong forever, it remains stable for a long time in the course of simulation.The population of strategies in this cooperative state has shown a high level of diversity, which is quantified by means of entropy steadily increasing during the period of cooperation. In this period, the dominant strategies have shown to be “warm-hearted” strategies, having the high level of friendship, tolerance, and flexibility.},
 title = {進化型IPDにおける共存社会の形成},
 year = {2011}
}