斗地主是中国民间最流行的纸牌玩法之一,具有不完全信息博弈和随机博弈的特征。在斗地主博弈过程中,既有攻守双方的对抗又有同伴之间的合作,是目前最复杂的博弈类型之一。分析了斗地主的博弈过程,从参与者、历史集合、参与者函数、信息...斗地主是中国民间最流行的纸牌玩法之一,具有不完全信息博弈和随机博弈的特征。在斗地主博弈过程中,既有攻守双方的对抗又有同伴之间的合作,是目前最复杂的博弈类型之一。分析了斗地主的博弈过程,从参与者、历史集合、参与者函数、信息空间、自然概率分布函数和参与者的偏好等6个方面描述了斗地主的博弈模型。模型为研究斗地主计算机博弈的理论或程序算法提供了理论依据和参考。研究将强化学习的DDQN(double deep Q-network)算法应用于叫牌出牌策略,针对实战中动态队友匹配机制造成的稳定性缺陷,引入监督学习的决策树策略优化,通过实验证明,强化学习和监督学习协同合作显著提升了系统的实战性能。展开更多
Electromagnetic forming is one of the high-rate forming methods that can be extensively used to form and join axisymmetric metal sheet and tube. Tendency of homogeneous radial deformation during electromagnetic compre...Electromagnetic forming is one of the high-rate forming methods that can be extensively used to form and join axisymmetric metal sheet and tube. Tendency of homogeneous radial deformation during electromagnetic compression of aluminium tube was investigated through the design optimization method based on sequential coupling numerical simulation and experiments. The results show that the tendency depends on the length ratio of tube to coil (R), which has a critical value (Rc) corresponding to the relatively homogeneous radial deformation along axial direction. The tube length relative to Rc is insensitive to the discharge voltage. When R is greater than Rc, the deformed tube presents horn shape and the shorter coil makes for local deformation. If R is less than Rc, the deformed tube presents drum shape and the longer coil contributes to larger deformation at tube end. Rc increases with coli length and could approach to 1; inversely, it could approach to 0. These results indicate the design optimization method based on the sequential coupling numerical simulation is feasible, which can be used to realize the controllable and precise deformation of metal tube.展开更多
文摘斗地主是中国民间最流行的纸牌玩法之一,具有不完全信息博弈和随机博弈的特征。在斗地主博弈过程中,既有攻守双方的对抗又有同伴之间的合作,是目前最复杂的博弈类型之一。分析了斗地主的博弈过程,从参与者、历史集合、参与者函数、信息空间、自然概率分布函数和参与者的偏好等6个方面描述了斗地主的博弈模型。模型为研究斗地主计算机博弈的理论或程序算法提供了理论依据和参考。研究将强化学习的DDQN(double deep Q-network)算法应用于叫牌出牌策略,针对实战中动态队友匹配机制造成的稳定性缺陷,引入监督学习的决策树策略优化,通过实验证明,强化学习和监督学习协同合作显著提升了系统的实战性能。
基金Projects(50575052, 50805036) supported by the National Natural Science Foundation of China
文摘Electromagnetic forming is one of the high-rate forming methods that can be extensively used to form and join axisymmetric metal sheet and tube. Tendency of homogeneous radial deformation during electromagnetic compression of aluminium tube was investigated through the design optimization method based on sequential coupling numerical simulation and experiments. The results show that the tendency depends on the length ratio of tube to coil (R), which has a critical value (Rc) corresponding to the relatively homogeneous radial deformation along axial direction. The tube length relative to Rc is insensitive to the discharge voltage. When R is greater than Rc, the deformed tube presents horn shape and the shorter coil makes for local deformation. If R is less than Rc, the deformed tube presents drum shape and the longer coil contributes to larger deformation at tube end. Rc increases with coli length and could approach to 1; inversely, it could approach to 0. These results indicate the design optimization method based on the sequential coupling numerical simulation is feasible, which can be used to realize the controllable and precise deformation of metal tube.
