2004 IEEE International Conference on Fuzzy Systems (IEEE Cat. No.04CH37542)

25-29 July 2004

Go

Filter Results

Displaying Results 1 - 25 of 125
  • Fuzzy relational equations in monoidal logics

    Publication Year: 2004, Page(s):1555 - 1559 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (802 KB) | HTML iconHTML

    We present a general framework for solving fuzzy relational equations in monoidal logics. This framework yields the general solution equations for relational systems based on large family of many-valued logics. The proofs use as a tool certain relational inequalities that we call BK-residuated bootstrap. First we extend to the realm of relational systems in monoidal logics the previous results con... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fine control of monotonic systems using a global self-learning adaptive fuzzy controller

    Publication Year: 2004, Page(s):1299 - 1303 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (828 KB) | HTML iconHTML

    The goal of this paper is to achieve real time control of a monotonic system which, in general, may be non-linear and whose differential equations are unknown. We assume that there is no model of the plant available so there cannot be any off-line pre-training of the main controller parameters. We propose a both adaptive and self-learning algorithm capable of starting from a "void" fuzzy controlle... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Efficient fuzzy arithmetic for nonlinear functions of modest dimension using sparse grids

    Publication Year: 2004, Page(s):1549 - 1554 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (931 KB) | HTML iconHTML

    Fuzzy arithmetic provides a powerful tool to introduce uncertainty into mathematical models. With Zadeh's extension principle, one can obtain a fuzzy extension of any objective function. We consider the difficult case of the objective function being an expensive to compute multivariate function of modest dimension (say d up to 16) where only real-valued evaluations of f are permitted. This often p... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On aggregation operators of transitive similarity and dissimilarity relations

    Publication Year: 2004, Page(s):1373 - 1377 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB) | HTML iconHTML

    Similarity and dissimilarity are widely used concepts. One of the most studied matters is their combination or aggregation. However, transitivity property is often ignored when aggregating despite being a highly important property, studied by many authors but from different points of view. We collect here some results in preserving transitivity when aggregating, intending to clarify the relationsh... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design and analysis of SISO fuzzy logic controller for power electronic converters

    Publication Year: 2004, Page(s):1293 - 1298 vol.3
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (932 KB) | HTML iconHTML

    Power converters are non-linear systems that usually employ linear controllers designed to offer good small signal performance at the nominal operating point. Yet, the converter's large-signal response is generally poor. Fuzzy logic controllers (FLCs) used in such cases improve the response, but their small-signal response is not as good as that of linear controller. In this paper, design of a SIS... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Aggregation as similarity in a morphological framework for the processing of textile images

    Publication Year: 2004, Page(s):1739 - 1744 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (991 KB) | HTML iconHTML

    Mathematical morphology has demonstrated to be a very powerful and flexible mean for the processing of binary and grayvalue images heretofore. Nevertheless, the extension of mathematical morphology to color images results are non-trivial due to the vectorial nature of such signals. This work presents an approach on color morphology based on the fuzzy integral, which is employed within the framewor... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fuzzy enhancement method using logarithmic models

    Publication Year: 2004, Page(s):1431 - 1436 vol.3
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1157 KB) | HTML iconHTML

    Simple and efficient enhancement methods can be obtained if affine transforms within logarithmic models are used. A very important thing in the affine transform determination for color images is the coordinate system that is used for color space representation. Thus, the using of the RGB coordinates leads to a simultaneous modification of luminosity and saturation. In this paper using a 4-coordina... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A fuzzy multiple criteria decision making model for software selection

    Publication Year: 2004, Page(s):1709 - 1713 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (670 KB) | HTML iconHTML

    Inspired by SWOT, which is a method for strategic analysis, we propose a new FMCDM for software selection. In our method, two matrices are constructed to represent the strength and weakness of the alternatives. With our method, we provide decision makers more information than the single index to make more subtle decision. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Eigen fuzzy sets and image information retrieval

    Publication Year: 2004, Page(s):1385 - 1390 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (823 KB) | HTML iconHTML

    An image can be interpreted as a fuzzy relation by normalizing the values of its pixels. We use the greatest eigen fuzzy set (for short, GEFS) with respect to the max-min composition and the smallest eigen fuzzy set (for short, SEFS) with respect to the min-max composition of this fuzzy relation for resolution of problems of image information retrieval. The experiments are executed on some images ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Application of interpolation-based fuzzy logic reasoning in behaviour-based control structures

    Publication Year: 2004, Page(s):1543 - 1548 vol.3
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (927 KB) | HTML iconHTML

    Some difficulties emerging during the construction of fuzzy behaviour-based control structures are inherited from the type of the applied fuzzy reasoning. The fuzzy rule base requested for many classical reasoning methods needed to be complete. In case of fetching fuzzy rules directly from expert knowledge e.g. for the behaviour coordination module, the way of building a complete rule base is not ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On Aristotelian tradition and fuzzy revolution

    Publication Year: 2004, Page(s):1585 - 1588 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (694 KB) | HTML iconHTML

    Aristotelian tradition of science and Aristotelian attitude to world are considered. Some considerations of the relationship between Aristotelian tradition and modal-based logics and between that and many-valued logics are done. Prof. Zadeh's early fuzzy set theory is presented as a special quasi-Boolean algebra. It is shown by examples that Aristotelian tradition of science remains as a part of n... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A design for a class of fuzzy control systems with state observer

    Publication Year: 2004, Page(s):1479 - 1484 vol.3
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (783 KB) | HTML iconHTML

    This paper addresses the fuzzy control problem using the Lyapunov synthesis approach. In order to deal with the case that the system state is unavailable, state observer is proposed. Consequently, the whole system behavior can be attributed to a kind of the standard singularly perturbed form. At the same time, to deal with the gap, if any, between the real state and its estimated value from the st... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Ranking invariance between fuzzy similarity measures applied to image retrieval

    Publication Year: 2004, Page(s):1367 - 1372 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (963 KB) | HTML iconHTML

    We first introduce the fuzzy similarity measures in the context of a CBIR system. This leads to the observation of an invariance in the ranking for different similarity measures. We then propose an explanation to this phenomenon, and a larger theory about order invariance for fuzzy similarity measures. We introduce a definition for equivalence classes based on order conservation between these meas... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Indistinguishability operators generated by fuzzy numbers

    Publication Year: 2004, Page(s):1567 - 1571 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (727 KB) | HTML iconHTML

    A new way to generate indistinguishability operators coherent with the underlying ordering structure of the real Dine is given in the sense that this structure should be compatible with the betweenness relation generated by the relation. A new way to generate indistinguishability operators coherent with the underlying ordering structure of the real line is given in the sense that this structure sh... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On parameter setting in applying Dave's noise fuzzy clustering to Gaussian mixture models

    Publication Year: 2004, Page(s):1501 - 1506 vol.3
    Cited by:  Papers (4)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (793 KB) | HTML iconHTML

    Gaussian mixture models (GMM) for density estimation uses maximum likelihood approach, whereas fuzzy c-means (FCM) clustering is based on an objective function method. The close relationship between them has been pointed out. When applying the robust fuzzy clustering approach by Dave to the GMM, careful parameter setting is required. From the consideration of the Gustafson and Kessel's constraint ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • How to tune fuzzy controllers

    Publication Year: 2004, Page(s):1287 - 1292 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (930 KB) | HTML iconHTML

    Fuzzy controllers tuning implies the handling of a great quantity of variables like: the shape, number and ranges of the membership functions, the percentage of overlap among them and the design of the rule base. The problem is more complicated when it is necessary to control multivariable systems due that the number of parameters. The importance of the tuning problem implies to obtain fuzzy syste... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fuzzy algorithm for contextual character recognition

    Publication Year: 2004, Page(s):1733 - 1738 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (937 KB) | HTML iconHTML

    Measuring the likeness between data in different ways is an important part of pattern recognition and, over the years, many such measures have been developed. This paper proposes an asymmetric measure of likeness based on the concept of context dependent divergence. This is used to construct a numerical descriptor for images and, in conjunction with fuzzy sets, to develop a supervised learning alg... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Construction of pedestrian navigation system and its evaluation

    Publication Year: 2004, Page(s):1525 - 1530 vol.3
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (993 KB) | HTML iconHTML

    This paper mentions the construction of the pedestrian navigation system which deals with subjective information. This system consists of the route setting part and the instruction generation part. The route setting part chooses the route with highest subjective satisfaction degree which are obtained by fuzzy measures and integrals. The instruction generation part gives users the instructions with... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Identification of recurrent fuzzy systems with genetic algorithms

    Publication Year: 2004, Page(s):1703 - 1708 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (885 KB) | HTML iconHTML

    This work presents an algorithm for identification of fuzzy recurrent models of non-linear dynamic systems. The identification algorithm is based on a general purpose genetic algorithm. The resulting recurrent fuzzy system can encode into a fuzzy finite state automaton in which the linguistic terms of the fuzzy model are the states, and rule base weights are transition possibilities. The identific... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Construction of fuzzy signature from data: an example of SARS pre-clinical diagnosis system

    Publication Year: 2004, Page(s):1649 - 1654 vol.3
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (802 KB) | HTML iconHTML

    There are many areas where objects with very complex and sometimes interdependent features are to be classified; similarities and dissimilarities are to be evaluated. This makes a complex decision model difficult to construct effectively. Fuzzy signatures are introduced to handle complex structured data and interdependent feature problems. Fuzzy signatures can also be used in cases where data is m... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fuzzy aggregation operators in region-based image retrieval

    Publication Year: 2004, Page(s):1379 - 1384 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (999 KB) | HTML iconHTML

    We examine the effect of the fuzzy aggregation operators on the image retrieval performance, by empirically comparing 67 operators, applied to the problem of computing the image similarity, given a collection of feature similarities of the image regions. While majority of the existing image similarity models express the image similarity as an aggregation of feature similarities, no study presents ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Car navigation and collision avoidance system with fuzzy logic

    Publication Year: 2004, Page(s):1443 - 1448 vol.3
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (841 KB) | HTML iconHTML

    A navigation control and collision avoidance system for delivering a car to the arbitrarily positioned loading dock is designed, based on the fuzzy trajectory mapping unit (TMU). Simulated driving experiments in different environmental conditions demonstrate that the designed system shows good performance. Modular structure of the control system facilitates both efficient control knowledge acquisi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Ontological grounding of fuzzy theory

    Publication Year: 2004, Page(s):1573 - 1576 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (652 KB) | HTML iconHTML

    A schema for the investigation of the philosophical grounding of fuzzy theory is proposed. In particular, the ontological grounding is investigated. It is shown that certain equivalences that exist in classical theory break down in fuzzy theory. In turn, this leads to the generation of new formulas and the laws of conservation fuzzy theory. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A comparison of three methods for computing the center of gravity defuzzification

    Publication Year: 2004, Page(s):1537 - 1542 vol.3
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (867 KB) | HTML iconHTML

    In this article three methods are presented to perform the center of gravity defuzzification method: one well known method, the discretisation method, and two new methods, the slope-based method and the modified transformation function method. The methods are worked out for trapezoidal membership functions forming a fuzzy (Ruspini) partition. Experimental results show that the newly introduced met... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 3D model estimation from multiple images

    Publication Year: 2004, Page(s):1661 - 1666 vol.3
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1057 KB) | HTML iconHTML

    3D reconstruction plays a very important role in computer vision. The determination of the 3D model from multiple images is of key importance. A 3D reconstruction algorithm is introduced, which is capable to determine the 3D model without any external intervention. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.