Journal ArticleDOI
Takagi–Sugeno Fuzzy Modeling Using Mixed Fuzzy Clustering
Catia M. Salgado,Joaquim L. Viegas,Carlos Azevedo,Marta C. Ferreira,Susana M. Vieira,João M. C. Sousa +5 more
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TLDR
The use of mixed fuzzy clustering (MFC) algorithm to derive Takagi–Sugeno (T–S) fuzzy models (FMs) is proposed, which outperform FCM-based T–S FMs in four out of five datasets and k-nearest neighbors classifiers in five out ofFive datasets.Abstract:
This paper proposes the use of mixed fuzzy clustering (MFC) algorithm to derive Takagi–Sugeno (T–S) fuzzy models (FMs). Mixed fuzzy clustering handles both time invariant and multivariate time variant features, allowing the user to control the weight of each component in the clustering process. Two model designs based on MFC are investigated. In the first, the antecedent fuzzy sets of the T–S model are obtained from the clusters obtained by the MFC algorithm. In the second, FMs based on fuzzy c-means (FCM) are constructed over the input space of the partition matrix generated by MFC. The proposed fuzzy modeling approaches are used in health care classification problems, where time series of unequal lengths are very common. MFC-based T–S FMs outperform FCM-based T–S FMs in four out of five datasets and k -nearest neighbors classifiers in five out of five datasets. Dynamic time warping performs better than the Euclidean distance in one dataset and similarly in the remaining. Given the different nature of time variant and invariant data, the choice of a clustering algorithm that treats data differently should be considered for model construction.read more
Citations
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EFMCDM: Evidential Fuzzy Multicriteria Decision Making Based on Belief Entropy
TL;DR: A novel evidential fuzzy MCDM method, called EFMCDM, is proposed by integrating Dempster–Shafer theory with belief entropy to decrease the uncertainty caused by subjective human cognition to improve decision making.
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Enhanced whale optimization algorithm for maximum power point tracking of variable-speed wind generators
TL;DR: Simulation results revealed that the enhanced whale optimization algorithm (EWOA) is a promising algorithm to be applied for solving different engineering problems.
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Whale optimization algorithm-based Sugeno fuzzy logic controller for fault ride-through improvement of grid-connected variable speed wind generators
TL;DR: Simulation results of using optimal Sugeno fuzzy logic controllers to improve the fault ride-through (FRT) ability of grid-connected WPPs revealed fast time response, less overshoot, and small steady-state error compared with those achieved by using a genetic algorithm (GA) and grey wolf optimizer (GWO).
Journal ArticleDOI
Deep Additive Least Squares Support Vector Machines for Classification With Model Transfer
TL;DR: Inspired by the stacked generalization principle and the transfer learning mechanism, a layer-by-layer combination of AK-LS-SVM classifiers embedded with transfer learning is proposed, which overcomes two main challenges and exhibits better generalization performance and faster learning speed.
Journal ArticleDOI
Salp swarm algorithm-based TS-FLCs for MPPT and fault ride-through capability enhancement of wind generators.
TL;DR: An optimum design of Takagi-Sugeno fuzzy logic controllers (TS-FLCs) is presented to enhance capability of fault ride-through (FRT) and the maximal power point tracking (MPPT) of the grid-tied wind farms.
References
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TL;DR: A representation and interpretation of the area under a receiver operating characteristic (ROC) curve obtained by the "rating" method, or by mathematical predictions based on patient characteristics, is presented and it is shown that in such a setting the area represents the probability that a randomly chosen diseased subject is (correctly) rated or ranked with greater suspicion than a random chosen non-diseased subject.
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Fuzzy identification of systems and its applications to modeling and control
T. Takagi,Michio Sugeno +1 more
TL;DR: A mathematical tool to build a fuzzy model of a system where fuzzy implications and reasoning are used is presented and two applications of the method to industrial processes are discussed: a water cleaning process and a converter in a steel-making process.
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PhysioBank, PhysioToolkit, and PhysioNet: components of a new research resource for complex physiologic signals.
Ary L. Goldberger,Luís A. Nunes Amaral,Leon Glass,Jeffrey M. Hausdorff,Plamen Ch. Ivanov,Roger G. Mark,Joseph E. Mietus,George B. Moody,Chung-Kang Peng,H. Eugene Stanley +9 more
TL;DR: The newly inaugurated Research Resource for Complex Physiologic Signals (RRSPS) as mentioned in this paper was created under the auspices of the National Center for Research Resources (NCR Resources).
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FCM: The fuzzy c-means clustering algorithm
TL;DR: A FORTRAN-IV coding of the fuzzy c -means (FCM) clustering program is transmitted, which generates fuzzy partitions and prototypes for any set of numerical data.
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Fuzzy Model Identification Based on Cluster Estimation
TL;DR: An efficient method for estimating cluster centers of numerical data that can be used to determine the number of clusters and their initial values for initializing iterative optimization-based clustering algorithms such as fuzzy C-means is presented.