为了更好地了解全球纺织产业的研究现状和研究热点,文章以中国知网和Web of Science核心数据集中的相关文献为研究对象,利用科学文献分析工具VOSviewer绘制知识图谱,通过对作者合作网络、核心研究机构以及关键词词频分布、共现、聚类等...为了更好地了解全球纺织产业的研究现状和研究热点,文章以中国知网和Web of Science核心数据集中的相关文献为研究对象,利用科学文献分析工具VOSviewer绘制知识图谱,通过对作者合作网络、核心研究机构以及关键词词频分布、共现、聚类等信息进行可视化分析,揭示了目前纺织产业领域研究的热点,为未来研究工作提供了一定参考。展开更多
学科交叉研究意义重大,数学作为基础学科,事实上与其他学科存在很多交叉,但有关交叉情况的具体研究比较少。基于Web of Science中数学领域的相关数据和期刊-学科的分类视角,采用学科共现分析法,构建了数学学科与交叉学科间的邻接矩阵。...学科交叉研究意义重大,数学作为基础学科,事实上与其他学科存在很多交叉,但有关交叉情况的具体研究比较少。基于Web of Science中数学领域的相关数据和期刊-学科的分类视角,采用学科共现分析法,构建了数学学科与交叉学科间的邻接矩阵。从复杂网络的角度,对数学大学科内部、数学大学科与其关联学科的交叉关系进行了图谱分析和测度分析。通过引入中介中心性、绝对度中心性、E-I指数深度剖析了交叉学科群的结构特征。本文理论分析所得的实证结果与实际情况较为一致,说明了所构建的学科交叉的指标及特征识别方法的可靠性,揭示了数学学科在整个学科交叉发展中的重要作用。展开更多
This paper investigates the control and synchronization of hyperchaotic Chen system based on the passive theory. By using two outputs, novel passive controllers are respectively designed to realize the globally asympt...This paper investigates the control and synchronization of hyperchaotic Chen system based on the passive theory. By using two outputs, novel passive controllers are respectively designed to realize the globally asymptotical stability of the hyperchaotic Chen system and the error dynamical system, which avoids mistakes in Ref.[11], where function W(z) cannot guarantee that fo(z) is globally asymptotically stable via only one output and W(z) is the Lyapunov function of f0(z). Furthermore, numerical simulations are given to show the effectiveness of our method.展开更多
This paper mainly investigates the exponential synchronization of an inner time-varying complex network with coupling delay. Firstly, the synchronization of complex networks is decoupled into the stability of the corr...This paper mainly investigates the exponential synchronization of an inner time-varying complex network with coupling delay. Firstly, the synchronization of complex networks is decoupled into the stability of the corresponding dynamical systems. Based on the Lyapunov function theory, some sufficient conditions to guarantee its stability with any given convergence rate are derived, thus the synchronization of the networks is achieved. Finally, the results are illustrated by a simple time-varying network model with a coupling delay. All involved numerical simulations verify the correctness of the theoretical analysis.展开更多
In this paper,the active sliding mode control method is utilized to study the synchronization for unified chaotic systems with noise-disturbed parameters.Some novel results about the suitable sliding mode surface and ...In this paper,the active sliding mode control method is utilized to study the synchronization for unified chaotic systems with noise-disturbed parameters.Some novel results about the suitable sliding mode surface and the synchronizing control law are derived,which avoid the mistake inequality sC △Ae≤‖△A‖∞sCein Ref.[Chaos,Solitons & Fractals 21(2004) 1249].Finally,numerical simulations are included to show the correctness of our results and the effectiveness of the developed approach.展开更多
In this paper is investigated the generalized projective synchronization of a class of chaotic (or hyperchaotic) systems, in which certain parameters can be separated from uncertain parameters. Based on the adaptive...In this paper is investigated the generalized projective synchronization of a class of chaotic (or hyperchaotic) systems, in which certain parameters can be separated from uncertain parameters. Based on the adaptive technique, the globally generalized projective synchronization of two identical chaotic (hyperchaotic) systems is achieved by designing a novel nonlinear controller. Furthermore, the parameter identification is realized simultaneously. A sufficient condition for the globally projective synchronization is obtained. Finally, by taking the hyperchaotic L system as example, some numerical simulations are provided to demonstrate the effectiveness and feasibility of the proposed technique.展开更多
This paper addresses the adaptive synchronization for uncertain Liu system via a nonlinear input. By using a single nonlinear controller, the approach is utilized to implement the synchronization of Liu system with to...This paper addresses the adaptive synchronization for uncertain Liu system via a nonlinear input. By using a single nonlinear controller, the approach is utilized to implement the synchronization of Liu system with total parameters unknown. This method is simple and can be easily designed. What is more, it improves the existing conclusions in Ref [12]. Simulation results prove that the controller is effective and feasible in the end.展开更多
This paper studies the parameter identification problem of chaotic systems. Adaptive identification laws are pro- posed to estimate the parameters of uncertain chaotic systems. It proves that the asymptotical identifi...This paper studies the parameter identification problem of chaotic systems. Adaptive identification laws are pro- posed to estimate the parameters of uncertain chaotic systems. It proves that the asymptotical identification is ensured by a persistently exciting condition. Additionally, the method can be applied to identify the uncertain parameters with any number. Numerical simulations are given to validate the theoretical analysis.展开更多
文摘为了更好地了解全球纺织产业的研究现状和研究热点,文章以中国知网和Web of Science核心数据集中的相关文献为研究对象,利用科学文献分析工具VOSviewer绘制知识图谱,通过对作者合作网络、核心研究机构以及关键词词频分布、共现、聚类等信息进行可视化分析,揭示了目前纺织产业领域研究的热点,为未来研究工作提供了一定参考。
基金Supported by National Natural Science Foundation of China(61304022,11271295)Educational Commission of Hubei Province(D20131602,Q20141609,Q20151609)Science and Technology Innovation Program of Wuhan Textile University(153027)
文摘学科交叉研究意义重大,数学作为基础学科,事实上与其他学科存在很多交叉,但有关交叉情况的具体研究比较少。基于Web of Science中数学领域的相关数据和期刊-学科的分类视角,采用学科共现分析法,构建了数学学科与交叉学科间的邻接矩阵。从复杂网络的角度,对数学大学科内部、数学大学科与其关联学科的交叉关系进行了图谱分析和测度分析。通过引入中介中心性、绝对度中心性、E-I指数深度剖析了交叉学科群的结构特征。本文理论分析所得的实证结果与实际情况较为一致,说明了所构建的学科交叉的指标及特征识别方法的可靠性,揭示了数学学科在整个学科交叉发展中的重要作用。
基金Project supported by the National Natural Science Foundation of China (Grant Nos 60574045 and 70771084)
文摘This paper investigates the control and synchronization of hyperchaotic Chen system based on the passive theory. By using two outputs, novel passive controllers are respectively designed to realize the globally asymptotical stability of the hyperchaotic Chen system and the error dynamical system, which avoids mistakes in Ref.[11], where function W(z) cannot guarantee that fo(z) is globally asymptotically stable via only one output and W(z) is the Lyapunov function of f0(z). Furthermore, numerical simulations are given to show the effectiveness of our method.
基金supported in part by the National Natural Science Foundation of China (Grant No. 11047114)the Key Project of the Chinese Ministry of Education (Grant No. 210141)the Youth Foundation of the Educational Committee of Hubei Province of China (Grant Nos. Q20111607 and Q20111611)
文摘This paper mainly investigates the exponential synchronization of an inner time-varying complex network with coupling delay. Firstly, the synchronization of complex networks is decoupled into the stability of the corresponding dynamical systems. Based on the Lyapunov function theory, some sufficient conditions to guarantee its stability with any given convergence rate are derived, thus the synchronization of the networks is achieved. Finally, the results are illustrated by a simple time-varying network model with a coupling delay. All involved numerical simulations verify the correctness of the theoretical analysis.
文摘In this paper,the active sliding mode control method is utilized to study the synchronization for unified chaotic systems with noise-disturbed parameters.Some novel results about the suitable sliding mode surface and the synchronizing control law are derived,which avoid the mistake inequality sC △Ae≤‖△A‖∞sCein Ref.[Chaos,Solitons & Fractals 21(2004) 1249].Finally,numerical simulations are included to show the correctness of our results and the effectiveness of the developed approach.
基金Project supported by the National Natural Science Foundation of China (Grant No 60574045) and partly by Foundation of Guangxi Department of Education, China (Grant No (2006)26-118).
文摘In this paper is investigated the generalized projective synchronization of a class of chaotic (or hyperchaotic) systems, in which certain parameters can be separated from uncertain parameters. Based on the adaptive technique, the globally generalized projective synchronization of two identical chaotic (hyperchaotic) systems is achieved by designing a novel nonlinear controller. Furthermore, the parameter identification is realized simultaneously. A sufficient condition for the globally projective synchronization is obtained. Finally, by taking the hyperchaotic L system as example, some numerical simulations are provided to demonstrate the effectiveness and feasibility of the proposed technique.
基金Project supported by the Educational Commission of Hubei Province of China,(Grant No 080056)
文摘This paper addresses the adaptive synchronization for uncertain Liu system via a nonlinear input. By using a single nonlinear controller, the approach is utilized to implement the synchronization of Liu system with total parameters unknown. This method is simple and can be easily designed. What is more, it improves the existing conclusions in Ref [12]. Simulation results prove that the controller is effective and feasible in the end.
基金Project supported in part by National Natural Science Foundation of China (Grant Nos. 11047114 and 60974081)in part by the Key Project of Chinese Ministry of Education (Grant No. 210141)
文摘This paper studies the parameter identification problem of chaotic systems. Adaptive identification laws are pro- posed to estimate the parameters of uncertain chaotic systems. It proves that the asymptotical identification is ensured by a persistently exciting condition. Additionally, the method can be applied to identify the uncertain parameters with any number. Numerical simulations are given to validate the theoretical analysis.