Download A Heuristic Approach to Possibilistic Clustering: Algorithms by Dmitri A. Viattchenin PDF

By Dmitri A. Viattchenin

The current e-book outlines a brand new method of possibilistic clustering during which the sought clustering constitution of the set of gadgets relies at once at the formal definition of fuzzy cluster and the possibilistic memberships are made up our minds without delay from the values of the pairwise similarity of items. The proposed method can be utilized for fixing assorted class difficulties. the following, a few suggestions that would be important at this function are defined, together with a strategy for developing a collection of classified items for a semi-supervised clustering set of rules, a strategy for decreasing analyzed characteristic area dimensionality and a tools for uneven information processing. furthermore, a method for developing a subset of the main applicable possible choices for a collection of vulnerable fuzzy choice relatives, that are outlined on a universe of possible choices, is defined intimately, and a mode for speedily prototyping the Mamdani’s fuzzy inference platforms is brought. This ebook addresses engineers, scientists, professors, scholars and post-graduate scholars, who're drawn to and paintings with fuzzy clustering and its applications

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Additional resources for A Heuristic Approach to Possibilistic Clustering: Algorithms and Applications

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X n } is the classification result that is obtained from the algorithm. Third, an algorithm of Chiang, Yue, and Yin[19] is very good illustration of a heuristic method of fuzzy clustering. Their FCC-algorithm is based on the concept of a fuzzy cover and an objective function meant to group the objects into appropriate fuzzy clusters. The fuzzy cover is defined in [19] as a fuzzy set in which the fuzzy relation of any enclosed object to the centroid object is larger than a certain level. The objective function is incorporated into the FCC-algorithm and this objective function reflects the natural grouping of fuzzy covers.

The family of shell-clustering algorithms includes: • • • fuzzy c -shells algorithm (FCS): detection of circles; fuzzy c -ellipsoidal shells algorithm (FCES): detection ofellipsoids; fuzzy c -quadric shells algorithm (FCQS): detection of ellipsoids. In the algorithms, each prototype τ~ l = (τ l , Rl ) consists of the cluster centre τ l and the radius R l . 81)  u liγ i =1 for all fuzzy clusters A l , l = 1,, c . 80) leads to a set of coupled non-linear equations for the τ and R l that cannot be solved in an analytic way.

24 1 Introductioon Fig. 2 Basic Methods of Fuzzy Clustering Objective function-based fuzzy clustering algorithms are considered in the firrst subsection which also deals with the problems of cluster validity annd interpretation of clustering g results. In the second subsection heuristic algorithms oof fuzzy clustering are descrribed. The third subsection of the section provides a brieef description of some hierarrchical fuzzy clustering procedures. 1 Optimization Methods of Fuzzy Clustering Fuzzy clustering methodss aim at discovering a suitable fuzzy partition or fuzzzy coverage for a given dataa set.

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