Reputation evaluation method for open multi-agent systems

A reputation evaluation method based on multi-dimensional information representation and correlative algorithm is proposed for open multi-agent systems. First,a vector model is established to represent the reputation related information. Second,a vector based reputation model"TRUST"is put forward to evaluate the reputation of agents. Finally,a correlative algorithm for selecting the most appropriate service provider is proposed. Simulation results indicate that the method can quickly and accurately to achieve the aim of adaptive immunity to reputation fraud and improving the average gain that service consumer agents obtained.     

等温退火对ZrCuAlNiCoNb非晶合金硬度和杨氏模量的影响

采用真空电弧熔炼结合水冷铜模吸铸法制备ZrCuAlNiCoNb大块非晶合金。采用XRD、AFM、SEM及纳米压痕分析手段研究等温退火对ZrCuAlNiCoNb非晶合金显微组织演变、硬度和杨氏模量的影响。结果表明,无论温度高低,退火均能使非晶合金中自由体积的数量减少。在低于玻璃化转变温度下退火,合金中自由体积数量下降,抑制了剪切带的形核,合金的硬度和杨氏模量随退火时间的增加而提高;在高于玻璃化转变温度下退火,短时间即可诱发纳米晶化,合金的硬度和杨氏模量均先增加,达到峰值后下降。ZrCuAlNiCoNb非晶合金力学性能的演变趋势是自由体积演变和纳米晶形核共同作用的结果。