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基于大数据的个性化英语教学策略 被引量:1
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作者 叶砾 陈剑 乐海平 《微型电脑应用》 2022年第1期41-44,共4页
研究了一种基于大数据的个性化英语教学系统并对其进行了测试。通过基于模糊控制矩阵算法的教师-学生匹配度算法,对英语教学系统的教师推荐机制做出革新,使学生可以匹配到更适合自己学习习惯的教师,同时对学生学习过程进行画像,对薄弱... 研究了一种基于大数据的个性化英语教学系统并对其进行了测试。通过基于模糊控制矩阵算法的教师-学生匹配度算法,对英语教学系统的教师推荐机制做出革新,使学生可以匹配到更适合自己学习习惯的教师,同时对学生学习过程进行画像,对薄弱知识点进行个性化学习,利用画像技术对学生参加常规英语考试的通过率做出估计评价。在内部测试中,学生用户对该软件的评价远高于教师用户,所以后续开发中,应开发针对教师用户的激励政策,以增加教师用户的黏性。 展开更多
关键词 大数据 英语教学系统 个性化学习 画像技术 模糊控制矩阵
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FUZZY ROBUST H_∞ CONTROL OF UNCERTAIN NONLINEAR SYSTEM WITH TIME-DEALY 被引量:3
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作者 刘亚 胡寿松 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2002年第2期123-126,共4页
This paper addresses the problem of the fuzzy H ∞state feedback control for a class of uncertain nonlinear systems with time delay. The Takagi Sugeno (T S) mo del with time delay and parameter uncertainties is ... This paper addresses the problem of the fuzzy H ∞state feedback control for a class of uncertain nonlinear systems with time delay. The Takagi Sugeno (T S) mo del with time delay and parameter uncertainties is adopted for modeling of nonlinear system. The systematic design procedure for the fuzzy robust controller based on linear matrix inequality (LMI) is given. Some sufficient conditions are derived for the existence of fuzzy H ∞ state feedback controllers such that the closed loop system is asymptotically stable and the effect of the disturbance input on controlled output is reduced to a prescribed level. An example is given to demonstrate the effectiveness of the proposed method. 展开更多
关键词 UNCERTAINTY time delay T S fuzzy model linear matrix inequality (LMI)
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AN H_∞ FUZZY TRACKING CONTROL SCHEME FOR AFFINE COUPLED SPATIO-TEMPORAL CHAOS
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作者 DouChunxia ZhangShuqing 《Journal of Electronics(China)》 2005年第1期59-65,共7页
Due to the interactions among coupled spatio-temporal subsystems and the constant bias term of affine chaos, it is difficult to achieve tracking control for the affine coupled spatiotemporal chaos. However, every subs... Due to the interactions among coupled spatio-temporal subsystems and the constant bias term of affine chaos, it is difficult to achieve tracking control for the affine coupled spatiotemporal chaos. However, every subsystem of the affine coupled spatio-temporal chaos can be approximated by a set of fuzzy models; every fuzzy model represents a linearized model of the subsystem corresponding to the operating point of the controlled system. Because the consequent parts of the fuzzy models have a constant bias term, it is very difficult to achieve tracking control for the affine system. Based on these fuzzy models, considering the affine constant bias term, an H∞ fuzzy tracking control scheme is proposed. A linear matrix inequality is employed to represent the feedback controller, and parameters of the controller are achieved by convex optimization techniques. The tracking control for the affine coupled spatio-temporal chaos is achieved, and the stability of the system is also guaranteed. The tracking performances are testified by simulation examples. 展开更多
关键词 Coupled spatio-temporal chaos Fuzzy model H∞ fuzzy tracking control Linear Matrix Inequality(LMI)
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