نتایج جستجو برای: possibilistic fuzzy c

تعداد نتایج: 1141186  

Journal: :IEEE transactions on systems, man, and cybernetics. Part B, Cybernetics : a publication of the IEEE Systems, Man, and Cybernetics Society 2003
Jonathan Lee Kevin F. R. Liu Weiling Chiang

Manipulation of perceptions is a remarkable human capability in a wide variety of physical and mental tasks under fuzzy or uncertain surroundings. Possibilistic reasoning can be treated as a mechanism that mimics human inference mechanisms with uncertain information. Petri nets are a graphical and mathematical modeling tool with powerful modeling and analytical ability. The focus of this paper ...

Journal: :iranian journal of fuzzy systems 2011
saeedeh pourahmad s. mohammad taghi ayatollahi s. mahmoud taheri

logistic regression models are frequently used in clinicalresearch and particularly for modeling disease status and patientsurvival. in practice, clinical studies have several limitationsfor instance, in the study of rare diseases or due ethical considerations, we can only have small sample sizes. in addition, the lack of suitable andadvanced measuring instruments lead to non-precise observatio...

2009
Qihang Lin Jian Zhou

A generalized approach to possibilistic clustering algorithms was proposed in [19], where the memberships are evaluated directly according to the data information using the fuzzy set theory, and the cluster centers are updated via a performance index. The computational experiments based on the generalized possibilistic clustering algorithms in [19] revealed that these clustering algorithms coul...

Journal: :Int. J. General Systems 2013
Tuan-Fang Fan Churn-Jung Liau Duen-Ren Liu

Variable consistency and variable precision models for dominance-based fuzzy rough set analysis of possibilistic information systems Tuan-Fang Fan a , Churn-Jung Liau b & Duen-Ren Liu c a Department of Computer Science and Information Engineering , National Penghu University of Science and Technology , Penghu , Taiwan b Institute of Information Science , Academia Sinica , Taipei , Taiwan c Inst...

Journal: :International Journal of Approximate Reasoning 2006

1991
Robert Fullér

Possibilistic linear equality systems (PLES) are linear equality systems with fuzzy parameters and crisp variables. We study the problem: For a given PLES with weakly noninteractive fuzzy number parameters how does the solution change if the parameters are varied?

2007
Gerd Wagner

Based on our earlier work on partial logics and extended logic programs Wag91, Wag94, HJW96], and on the possibilistic logic of DLP94], we deene a compositional possibilistic rst-order logic with two kinds of negation as the logical basis of semi-possibilistic and possibilis-tic logic programs. We show that in the same way as the minimal model semantics of relational databases can be reened to ...

Journal: :Fuzzy Sets and Systems 2006
Paolo Giordani

In this work we address the data reduction problem for fuzzy data. In particular, following a possibilistic approach, several component models for handling twoand three-way fuzzy data sets are introduced. The two-way models are based on classical Principal Component Analysis (PCA), whereas the three-way ones on threeway generalizations of PCA, as Tucker3 and CANDECOMP/PARAFAC. The hereproposed ...

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