H∞ tracking control for nonlinear multivariable systems using wavelet-type TSK fuzzy brain emotional learning with particle swarm optimization     

Jing Zhao  Zhixiong Zhong  Chih-Min Lin  Hak-Keung Lam 《Journal of The Franklin Institute》2021,358(1):650-673

This paper studies the ${\mathit{H}}_{\infty }$ tracking control for uncertain nonlinear multivariable systems. We propose a control strategy, which combines the adaptive wavelet-type Takagi-Sugeno-Kang (TSK) fuzzy brain emotional learning controller (WTFBELC) and the $H_{\infty }$ robust tracking compensator. As for the adaptive WTFBELC, it is a main controller designed to mimic the ideal controller. The proposed WTFBELC is to obtain much better ability of handling nonlinearities and uncertainties, but the proposed $H_{\infty }$ robust tracking compensator is to compensate the residual error between the adaptive WTFBELC and the ideal controller. Furthermore, the optimal learning rates of the adaptive WTFBELC are searched quickly by using the particle swarm optimization (PSO) algorithm, and the parameter updated laws are derived based on the steepest descent gradient method. The robust tracking performance of this novel control scheme is guaranteed based on Lyapunov stability theory. The mass-spring-damper mechanical system and the three-link robot manipulator, are used to verify the effectiveness of the proposed adaptive PSO-WTFBELC $H_{\infty }$ control scheme.  相似文献   

多项式环上一次不定方程的矩阵解法与程序设计     

晏林 《科技通报》2004,20(4):316-319

利用多项式环F[x]上的欧几里德算法给出求解多项式环F[x]上的多元一次不定方程通解的矩阵解法，同时利用MATLAB数学软件给出相应的计算机求解多项式环F[x]上一次不定方程的程序，这种方法可以普遍地应用．  相似文献   

Trust: Reason,Routine, Reflexivity     

John B Kidd 《知识管理研究与实践》2006,4(3):254-255

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Clinico-Biochemical indexing of calcium urolithiasis on the basis of urinary citrate to calcium ratio and inhibition of mineralisation of urinary stone forming minerals by human urine     

T. V. R. K. Rao  Sofia Bano 《Indian journal of clinical biochemistry : IJCB》2003,18(1):52-60

Urinary citric acid and calcium levels have been estimated in the urine of 20 normal healthy persons as well as 12 urinary stone patients. Inhibition efficiency of these urine samples towards the mineralisation of urinary stone forming minerals, viz., calcium phosphate, oxalate or carbonate, has been studied in an experimental model. Statistical correlation of the above data has been made by computing the coefficient of determination and unexplained variance. Clinico-biochemical indexing of calcium urolithiasis risk factor has been attempted in the light of the data.  相似文献   

多项式模代数在多值逻辑系统中的适应性     

杜芹香  赵俊 《科技通报》1997,13(1):44-47

针对文献［１］中的模代数系统对多值逻辑的适应性定理，指出了多项式模代数系统对于基数为素数幂值逻辑的适应性  相似文献   

Is knowledge merely perception?     

Heiner Müller-Merbach 《知识管理研究与实践》2004,2(3):200-200

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Abstraction and Concept Formation     

Steven French 《Metascience》2007,16(3):539-542

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Optimal pruning for tree-structured vector quantization     

Jianhua Lin  James A. Storer  Martin Cohn 《Information processing & management》1992,28(6)

Tree-structured vector quantization (VQ) is a technique designed to represent a codebook that simplifies encoding as well as vector quantizer design. Most design algorithms for tree-structured VQ used in the past are based on heuristics that successively partition the input space. Recently, Chou, Lookabaugh and Gray proposed a tree-pruning heuristic in which a given initial tree is pruned backwards according to certain optimization criterion. We define the notion of an optimal pruned tree subject to a cost constraint and study the computational complexity of finding such an optimal tree for various cost functions. Under the assumption that all trees are equally probable, we show that, on the average, the number of pruned trees in a given tree is exponential in the number of leaves. Furthermore, we prove that finding an optimal pruned tree subject to constraints such as entropy or the expected-depth is NP-hard. However, we show that when the constraint is the number of leaves, the problem can be solved in polynomial time. We develop an algorithm to find the optimal pruned tree in O(nk) time, where n is the size of the initial tree and kis the constraint size.  相似文献   

数字参考服务若干问题研究   总被引：11，自引：0，他引：11  

林秀 《情报科学》2004,22(6):691-694

文章论述了数字参考服务的概念与内涵，以及数字参考服务的三种基本方式，指出了未来数字参考服务的发展趋势，认为提供个性化服务是未来数字参考服务的核心方向与目标。  相似文献   

知识联盟中关系风险的成因及影响因素分析   总被引：4，自引：0，他引：4  

蔺丰奇  刘益 《中国科技论坛》2007,(3):94-98,93

知识联盟是企业战略联盟的一种重要形式，它以学习和创造知识作为联盟的中心目标。它有助于企业之间的相互学习和交流，有助于企业之间的优势互补，创造新的交叉知识。但是知识联盟本身是一个不稳定的系统，它本身就存在许多不确定因素，并由此导致联盟伙伴的关系风险。关系风险是造成知识联盟瓦解的风险来源，因而成为研究的一个重要议题。本文在文献基础上，分析了知识联盟中关系风险的成因和影响因素。  相似文献