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Stabilization for discrete-time fuzzy systems with Takagi-Sugeno's models:reduce the complexity

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Science China(Information Sciences) 2010年第12期53卷 2506-2513页

作者： WANG LiKui 1 & LIU XiaoDong 2 1 School of Mathematics and Information Science,nanchang Hangkong university,nanchang {3.006{3.China 2 Research Center of Information and Control,Dalian university of Technology,Dalian 116024,China 1. School of Mathematics and Information Science Nanchang Hangkong University Nanchang 330063 China2. Research Center of Information and Control Dalian University of Technology Dalian 116024 China

The problem of sate feedback control for discrete-time fuzzy systems with Takagi-Sugeno's models is investigated to reduce the computational burden.A stabilization condition is obtained by applying a new Lyapunov *** is shown that our new theorem is equivalent to an existing result in guaranteeing the stability of the fuzzy system but consumes less computational time than the *** effectiveness and the superiority of the proposed design approach are demonstrated by an example borrowed from the literature.

关键词： Takagi-Sugeno’s fuzzy model non-quadratic Lyapunov function linear matrix inequality

Gas Turbulence Modulation Model for Gas-Solid Flows in Two-Fluid Approach

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Journal of Shanghai Jiaotong university(Science) 2010年第4期15卷 428-433页

作者：曾卓雄潘阳周力行 Aircraft Engineering College Nanchang Hangkong University School of Civil Engineering and Architecture East China Jiaotong University Department of Engineering Mechanics Tsinghua University

Turbulence enhancement by particle wake effect is studied by numerical simulation of gas turbulent flows passing over particle under various particle sizes, inlet gas velocities, gas viscosity, gas density and the distance of particles. By performing dimension analysis and using the form of gas-particle interaction source term for reference, a new semi-empirical turbulence enhancement model by the particle-wake effect is proposed. The turbulence model is then incorporated into second-order moment model for simulating gas-particle flows in a horizontal channel with different wall roughness and a sudden-expansion chamber. The results show that this model is with higher calculating accuracy than another two turbulence models in comparison with the experimental results.

关键词： gas-particle flows turbulence modulation particle wake effect

A SEMI-ANALYTICAL SOLUTION FOR CHARACTERISTICS OF A DAMRESERVOIR SYSTEM WITH ABSORPTIVE RESERVOIR BOTTOM

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Journal of Hydrodynamics 2008年第6期20卷 727-734页

作者： LI Shang-ming LIANG Hong LI Ai-min School of Civil Engineering and Architecture Nanchang University Nanchang 330031 China

In this study, a semi-analytical formulation based on the Scaled Boundary Finite Element Method （SBFEM） was proposed and used to obtain the solution for the characteristics of a two-dimensional dam-reservoir system with absorptive reservoir bottom in the frequency domain. For simplicity, the dam with arbitrary upstream faces was assumed to be rigid and was subjected to a horizontal ground acceleration, while the reservoir with absorptive bottom was assumed to be semi-infinite. The reservoir was divided into two sub-domains： a near-field sub-domain and a far-field sub-domain. The near-field sub-domain with arbitrary geometry was modelled by the Finite Element Method （FEM）, while the effects of the far-field sub-domain which was assumed to be horizontal were described by a semi-analytical formation. The semi-analytical formulation involved the effect of absorptive reservoir bottom, as well as the radiation damping effect of a semi-infinite reservoir. A FEM/SBFEM coupling formulation was presented to solve dam-reservoir coupled problems. The accuracy and efficiency of the coupling formulation were demonstrated by computing some benchmark examples. Highly accurate results are produced even if the near-field sub-domain is very small.

关键词： dam-reservoir interaction absorptive bottom SBFEM Hydraulic pressure FEM/SBFEM coupling formulation

Characteristics of distribution of heavy metals insediment of Le An River

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Journal of Environmental Sciences 1995年第2期7卷 240-245页

作者： Li Qi (Research Center for Eco - Environmental Sciences,Chinese Academy of Sciences , BeiJing 100085 , China)Chen Shiming (nanchang Institute of Aeronautical Technology . nanchang 33003. , China) A. Yahya (Institute for Sedimentology, {3. of Heid Rsch Ctr for Eco-Envmtl Sci Chinese Academy of Sciences Beijing China China

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关键词： Heavy metals sedirnent pollution.

Fuzzy Neural Network PID Controller for seam tracking

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微计算机信息 2006年第25期 71-73页

作者： (Robot&Welding Automation Key Laboratory, nanchang U-niversity, nanchang 330029, China)Xiao,Min Zhang,Hua Jia, Jianping (school of information Engineering, nanchang university, nanchang 330029,China)

A Fuzzy Neural Network PID Controller is proposed in this paper, Fuzzy Neural Network Controller is used to optimize the parameters of PID Controller real time. Computer simulation using MATLAB shows that, comparing to the classical PID Controller, Fuzzy Neural Network PID Controller can improve the precision of control results for seam tracking.

关键词： self-adaptation PID Fuzzy neural network.

A Case of Energy and Ecology System Development and a New Approach to System Dynamics Modeling

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Systems Science and Systems Engineering 2002年第4期11卷 462-470页

作者： JIA Ren-an, YANG Bo, WU Fu-ming, HU Ling Institute of Systems Engineering, nanchang university, nanchang 330047, China Institute of Systems Engineering Nanchang University Nanchang 330047 China

This paper uses SD rate variable fundamental in-tree modeling, SD branch-vector determinant method and systems archetype as tools to understand the structure and functions of energy and ecology system in Wangheqiu.

关键词： energy and ecology system feedback loop systems archetype

Improvement of Efficiency and Flexibility in Multi-slice Helical CT

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Journal of Shanghai Jiaotong university(Science) 2008年第4期13卷 408-412页

作者：孙文武陈思平庄天戈 nanchang Institute of Aeronautical Technology Shenzhen university Department of Biomedical Engineering Shanghai Jiaotong University

One of the main aspects in computed tomography (CT) development is to make CT rapidly scan a large longitudinal volume with high z-axis resolution. The combination of helical scanning with multi-slice CT is a promising approach. Image reconstruction in multi-slice CT becomes, therefore, the major challenge. Known algorithms need to derive the complementary data or work only for certain range of pitches. A reconstruction algorithm was presented that works with the direct data as well as arbitrary pitches. Filter interpolation based on the proposed method was implemented easy. The results of computer simulations under kinds of conditions for four-slice CT were presented. The proposed method can obtain higher efficiency than the conventional method.

关键词： multi-slice computed tomography helical interpolation rebinning filter interpolation

Polymorphisms of three gene-derived STS on pig chromosome 13.41 are associated with susceptibility to enterotoxigenic Escherichia coli F4ab/ac in pigs

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Science China(Life Sciences) 2008年第7期51卷 614-619页

作者： HUANG Xiang 1 ,REN Jun 1 ,YAN XueMing 1,2 ,PENG QiuLing 1 ,TANG Huan 1 ,ZHANG Bo 1 ,JI HuaYuan 1 , YANG ShuJin1&HUANG LuSheng 1 1Key Laboratory for Animal Biotechnology of Jiangxi Province and the Ministry of Agriculture of China,Jiangxi Agricultural university, nanchang 330045,China 2Department of Biology,nanchang university of Science and Technology,nanchang 3.003.,China 1. Key Laboratory for Animal Biotechnology of Jiangxi Province and the Ministry of Agriculture of China Jiangxi Agricultural University Nanchang 330045 China 2. Department of Biology Nanchang University of Science and Technology Nanchang 330038 China

Neonatal diarrhea caused by enterotoxigenic Escherichia coli(ETEC)F4 is a common and serious disease,resulting in significant economical loss in the pig *** locus encoding ETEC F4 receptor has been mapped to pig chromosome(SSC)13.41,and one of the most significantly linked markers is *** this study,we selected three genes including SLC12A8,MYLK and KPNA1 from a chromosomal region flanking S0075 on SSC13.to develop pig specific sequence tagged sites(STS). Seven single nucleotide polymorphisms were identified in the three pig STS using DNA of four full-sib susceptible and resistant animals in a White Duroc×Erhualian *** grandparents,parents and 755 offspring in the intercross were genotyped for three polymorphisms,including SLC12A8 g.159A>G,MYLK g.1673.>G and KPNA1 g.3.6A>***-based transmission disequilibrium test(TDT) revealed that all polymorphisms and the corresponding haplotypes are significantly associated with ETEC F4ab/ac(especially F4ac)brush border adhesion phenotypes,indicating that these polymor- phism are in linkage disequlibrium with causal mutation(s)of the gene encoding ETEC F4ab/ac receptor. Our results strengthen the evidence for the involvement of SSC13.41 in high acquiring risk of ETEC F4ab/ac infection,and provide novel polymorphic markers for fine mapping of the ETEC F4ab/ac receptor locus.

关键词： pig SSC13.41 sequence tagged sites(STS) Escherichia coli(ETEC)F4ab/ac susceptibility

四生学习:新加坡未来教师培养的理念、举措与启示

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世界教育信息 2024年第9期37卷 44-52页

作者：杨南昌余凌倩梁慧芳江西师范大学教育研究院南昌330022 江西师范大学教育学院南昌330022

为培养面向21世纪的教师,新加坡国立教育学院以学习科学关于“人是如何学习”的循证研究为依据,聚焦“有目的的学习”,构建了以终生、宽生、深生、智生“四生学习”理念为指导的教师教育模式。该模式倡导将职前教师的学习与目的相关联,... 详细信息

为培养面向21世纪的教师,新加坡国立教育学院以学习科学关于“人是如何学习”的循证研究为依据,聚焦“有目的的学习”,构建了以终生、宽生、深生、智生“四生学习”理念为指导的教师教育模式。该模式倡导将职前教师的学习与目的相关联,建立能力框架与实践课程,夯实持续一生的专业成长根基(终生);开设跨界学习项目,增强跨界教学能力(宽生);强化实践关联的课程创新,发展深度学科理解与适应性专长(深生);开展价值本位教育,多层面驱动教师智慧生成(智生)。借鉴新加坡“四生学习”理念,推动我国教师教育改革发展,可完善师范生专业能力标准,增强课程的多重跨界,注重师范生专家思维的培养,以及涵养师范生的教育家精神。

关键词：四生学习未来教师培养新加坡教师教育学习科学

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