A state estimation based constrained model predictive control system

In this paper,the model predictive control based on the state estimation for a constrained system isinvestigated.By modifying the constraints for the predictive state,the control sequence becomes feasiblefor the real system,i.e.,the system state is guaranteed to be in the constraint domain.It s also provedthat the close-loop system is asymptotically stable and the system state converges to the origin.The conclusionis verified through simulation.

语境对二语学习者等级词项在线加工的影响

等级含义的推导是语义学与语用学研究的重要课题。"默认论"和"语境驱动论"对语境如何影响等级含义生成和撤销提出了不同论断。本研究采用得体性判断和自控步速阅读实验,以语境影响为研究视角,考察了汉语母语的英语二语学习者如何解读和加工等级词项。结果表明,二语学习者获得等级含义的能力与母语者相近,而且在上限语境中获得语用语义比下限语境中获得逻辑语义的加工时间要短。尽管结果大体上符合"默认论",但本研究及相关研究结果更支持"基于制约"模型,即语境中不同类型的诱因决定等级词项的解读结果和过程。