By controlling the feed ratio of CMS/styrene and the polymerization time, a series of hyperbranched copolystyrenes(HBCPS) were synthesized with comparable weight-averaged molecular weights(Mw) but different degree...By controlling the feed ratio of CMS/styrene and the polymerization time, a series of hyperbranched copolystyrenes(HBCPS) were synthesized with comparable weight-averaged molecular weights(Mw) but different degree of branching(DB) through atom transfer radical self-condensing vinyl copolymerization(ATR-SCVCP) with Cu Br/2,2?-bipyridyl as the catalyst. The resulting HBCPS samples were used to investigate the effect of branching architecture on their glass transition behavior. With the DB increased, the glass transition temperatures(Tg) of HBCPS samples measured by DMA and DSC both decreased. Their spin-lattice relaxation times(1H T1r) of protons displayed the same downtrend with increasing DB. Besides, a correlation between the Tgs and the DB was well established by all-atom molecular dynamics(MD) simulations. The values of MD-determined Tgs are little higher than the corresponding experimental ones. However, the dependence of Tgs on DB is in good agreement with the experimental results, i.e., Tg decreases both in experiments and simulations with increasing DB.展开更多
智能体由于自身交互行为与学习行为的复杂性,难以直接被建模和仿真。针对智能体离散仿真中的常见问题,借助DEVS(discrete event system specification)原子模型的事件转移机制表示智能体的交互与学习过程,通过对智能体交互模式、多状态...智能体由于自身交互行为与学习行为的复杂性,难以直接被建模和仿真。针对智能体离散仿真中的常见问题,借助DEVS(discrete event system specification)原子模型的事件转移机制表示智能体的交互与学习过程,通过对智能体交互模式、多状态外部事件转移控制、端口连接模式、以及强化学习事件转移表示等原子模型下智能体建模技术的介绍,给出了基于DEVS原子模型的智能体离散仿真构建方法。在网格世界与倒立摆2个环境中进行仿真验证,实验结果证明了提出方法在构建智能体交互行为和学习行为的可行性和有效性。展开更多
基金financially supported by the National Basic Research Program(Nos.2012CB821500 and 2013CB834506)the National Natural Science Foundation of China(Nos.9112704721174086 and 21274167)
文摘By controlling the feed ratio of CMS/styrene and the polymerization time, a series of hyperbranched copolystyrenes(HBCPS) were synthesized with comparable weight-averaged molecular weights(Mw) but different degree of branching(DB) through atom transfer radical self-condensing vinyl copolymerization(ATR-SCVCP) with Cu Br/2,2?-bipyridyl as the catalyst. The resulting HBCPS samples were used to investigate the effect of branching architecture on their glass transition behavior. With the DB increased, the glass transition temperatures(Tg) of HBCPS samples measured by DMA and DSC both decreased. Their spin-lattice relaxation times(1H T1r) of protons displayed the same downtrend with increasing DB. Besides, a correlation between the Tgs and the DB was well established by all-atom molecular dynamics(MD) simulations. The values of MD-determined Tgs are little higher than the corresponding experimental ones. However, the dependence of Tgs on DB is in good agreement with the experimental results, i.e., Tg decreases both in experiments and simulations with increasing DB.
文摘智能体由于自身交互行为与学习行为的复杂性,难以直接被建模和仿真。针对智能体离散仿真中的常见问题,借助DEVS(discrete event system specification)原子模型的事件转移机制表示智能体的交互与学习过程,通过对智能体交互模式、多状态外部事件转移控制、端口连接模式、以及强化学习事件转移表示等原子模型下智能体建模技术的介绍,给出了基于DEVS原子模型的智能体离散仿真构建方法。在网格世界与倒立摆2个环境中进行仿真验证,实验结果证明了提出方法在构建智能体交互行为和学习行为的可行性和有效性。