Abstract: To explore how the smart contract should be formulated by the cloud manufacturing service platform to further guarantee the transaction reliability of the platform under the blockchain technology,a game model was built for the transaction strategy of the supplier and the demander executing the smart contract in this platform,and the simulation experiment was carried out by MATLAB.The results showed that when the difference of reputation benefit,information benefit,performance bond reward and risk cost was greater than 0,and the difference of net benefit between no-change strategy and change strategy was greater than 0,both parties’ strategies of executing the contract would evolve towards performance.At the same time,the amount of guarantee and reputation feedback had a positive effect on the choice of the performance strategy,and the risk coefficient had a negative effect.The higher the historical transaction quality,the greater the influence of other parameters on the evolution speed.

Key words: blockchain, cloud manufacturing, smart contract, evolutionary game

摘要： 为了在区块链技术下探究云制造服务平台如何制定智能合约来进一步保障平台交易的可靠性,针对供需双方在平台中执行智能合约的交易策略构建博弈模型,并通过MATLAB软件进行仿真实验。结果显示,当双方的信誉收益、信息收益、履约保证金奖励和风险成本之差均大于0,且在选择履约时不改变策略与改变策略的净收益之差大于0时,双方执行合约的策略都会向履约演化;保证金和信誉反馈金额对选择履约策略有正向作用,风险系数有负向作用,而且历史交易质量越高演化速度受其他参数的影响越大。

关键词: 区块链, 云制造, 智能合约, 演化博弈