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Proceedings Joint 9th IFSA World Congress and 20th NAFIPS International Conference (Cat. No. 01TH8569)

25-28 July 2001

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  • Joint 9th IFSA World Congress and 20th NAFIPS International Conference [front matter]

    Publication Year: 2001, Page(s):0_1 - xxii
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    Freely Available from IEEE
  • Index

    Publication Year: 2001, Page(s): I
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    Freely Available from IEEE
  • Latent class DEDICOM

    Publication Year: 2001, Page(s):2177 - 2182 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB) | HTML iconHTML

    A probabilistic DEDICOM model is proposed for mobility tables. The model attempts to explain observed transition probabilities by a latent mobility table and a set of transition probabilities from latent classes to observed classes. The model captures asymmetry in observed mobility tables by asymmetric latent mobility tables. It may be viewed as a special case of both the latent class model and DE... View full abstract»

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  • Creating metabolic and regulatory network models using fuzzy cognitive maps

    Publication Year: 2001, Page(s):2171 - 2176 vol.4
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB) | HTML iconHTML

    This paper describes a model of metabolic networks that uses fuzzy cognitive maps. Nodes of the map represent specific biochemicals such as proteins, RNA, and small molecules, or stimuli, such as light, heat, or nutrients. Edges of the map capture regulatory and metabolic relationships found in biological systems. These relationships are established by a domain expert, the biological literature, a... View full abstract»

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  • Fuzzy cognitive maps for decision support in an intelligent intrusion detection system

    Publication Year: 2001, Page(s):2165 - 2170 vol.4
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB) | HTML iconHTML

    The health of a computer network needs to be assessed and protected in much the same manner as the health of a person. The task of an intrusion detection system is to protect a computer system by detecting and diagnosing attempted breaches of the integrity of the system. A robust intrusion detection system for a computer network will necessarily use multiple sensors, each providing different types... View full abstract»

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  • A design method of stable fuzzy controller on symbolic level for dynamical systems

    Publication Year: 2001, Page(s):2062 - 2065 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB) | HTML iconHTML

    Fuzzy inference has a multi-granular architecture consisting of symbols and continuous values, and this architecture has worked well to incorporate experts' know-how into fuzzy controls. The symbolic stability analysis of fuzzy control systems has been developed. However, this conventional analysis has not been applied to dynamic systems with state variables. This paper presents a design method of... View full abstract»

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  • Discovering similar time-series patterns with fuzzy clustering and DTW methods

    Publication Year: 2001, Page(s):2160 - 2164 vol.4
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB) | HTML iconHTML

    Data mining, as an active field, discovers useful knowledge from large data sets. This paper focuses on continuous time series data that have often been encountered in real applications (e.g., sales records, economic data and stock transactions) and discusses how to discover the hidden relationship among time series patterns in terms of their similarities. Fuzzy clustering and dynamic time warping... View full abstract»

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  • Stable control for R/C helicopter

    Publication Year: 2001, Page(s):2056 - 2061 vol.4
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB) | HTML iconHTML

    This paper presents the stable control for an R/C helicopter whose degree of freedom is reduced by fixing at a (joint) point. The nonlinear model of the R/C helicopter is constructed. After simplifying the nonlinear dynamics, we replace the simplified nonlinear dynamics with a Takagi-Sugeno fuzzy model. The control purpose is to realize good speed of response as well as stabilization with small co... View full abstract»

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  • Fuzzy clustering for categorical multivariate data

    Publication Year: 2001, Page(s):2154 - 2159 vol.4
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB) | HTML iconHTML

    This paper proposes a new fuzzy clustering algorithm for categorical multivariate data. The conventional fuzzy clustering algorithms form fuzzy clusters so as to minimize the total distance from cluster centers to data points. However, they cannot be applied to the case where only cooccurrence relations among individuals and categories are given and the criterion to obtain clusters is not availabl... View full abstract»

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  • Modifications of fuzzy directional queries for spatial databases

    Publication Year: 2001, Page(s):2394 - 2399 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB) | HTML iconHTML

    A previously developed approach (M. Cobb and F. Petty, 1998) for determining directional and spatial relationships has been based on the partitioning of the Minimum Bounding Rectangle (MBR) that represents the underlying actual spatial object. This development took an approach which allowed a very computationally efficient determination of directions. However the simplifications caused some anomal... View full abstract»

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  • Qualitative fuzzy sets: a comparison of three approaches

    Publication Year: 2001, Page(s):2359 - 2363 vol.4
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB) | HTML iconHTML

    A real world fuzzy set should be able to tolerate "small amounts" of perturbations. There are three approaches. Thiele's (1999; 2000) approach, observing some weak points of Lin's earlier versions, proposed a refined approach based on Kripke style semantics; his results, but independently, are essentially applying Lin's (1996) view using Lin's (1998) new notion of neighborhood systems. A type II f... View full abstract»

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  • Nonlinear rule reduction and robust control

    Publication Year: 2001, Page(s):2050 - 2055 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB) | HTML iconHTML

    We propose an approach for modeling and model reduction using a generalized form of Takagi-Sugeno fuzzy systems. First, we define a generalized form of Takagi-Sugeno fuzzy systems. The structure of these fuzzy systems has some advantages: they accord with dynamics of the original model and they are suitable for reducing the number of rules. Thus, these fuzzy systems are constructed by many if-then... View full abstract»

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  • On the use of fuzzy numbers in flexible querying

    Publication Year: 2001, Page(s):2440 - 2445 vol.4
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB) | HTML iconHTML

    An issue in extending database management functionalities is to increase the expressiveness of query languages. Flexible querying enables users to express preferences inside requirements and priorities inside compound queries. The answers are then qualified and sorted out. The fuzzy set theory offers a general framework for dealing with flexible queries. Moreover, the bag structure plays an import... View full abstract»

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  • Musical symbol recognition using SOM-based fuzzy systems

    Publication Year: 2001, Page(s):2150 - 2153 vol.4
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB) | HTML iconHTML

    A large number of research activities have been undertaken to investigate optical music recognition (OMR). OMR involves identifying musical symbols on a scanned sheet of music and transforming them into a computer readable format. We propose an efficient method based on SOM-based fuzzy systems to recognize musical symbols. A database consisting of 9 kinds of musical symbols were used to test the p... View full abstract»

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  • A CLIPS-based implementation for querying binary spatial relationships

    Publication Year: 2001, Page(s):2388 - 2393 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB) | HTML iconHTML

    The power of spatial queries for analysis and planning purposes in many different application fields has drawn significant attention within the GIS research field. The extraction of meaningful information from spatial data requires specialized data structures, query languages and query processing strategies. The paper is primarily concerned with the binary data structures that support the fuzzy qu... View full abstract»

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  • Stabilization control of ball and beam systems

    Publication Year: 2001, Page(s):2229 - 2234 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB) | HTML iconHTML

    A new fuzzy controller for stabilization control of ball-and-beam systems is proposed based on the SIRM (single-input rule module) dynamically connected fuzzy inference model. The fuzzy controller deals with four input items. Each input item has a SIRM and a dynamic importance degree. By using the SIRMs and the dynamic importance degrees, the fuzzy controller automatically switches the ball positi... View full abstract»

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  • Fuzzy disjunctive and conjunctive canonical forms: a foundation for interval-valued fuzzy techniques

    Publication Year: 2001, Page(s):2353 - 2358 vol.4
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    Fuzzy disjunctive and conjunctive canonical forms, FDCF, and FCCF, respectively, should be used as a foundation for interval-valued approximate reasoning. It has been shown that in the combination of linguistic concepts, membership values generated by linguistic operators, "AND", "OR", "IMP", etc., as opposed to crisp connectives that are known as t-norms and t-conorms and standard negation, are c... View full abstract»

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  • Fuzzy sets and decision making system for thyroid hormone profile

    Publication Year: 2001, Page(s):2046 - 2049 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB) | HTML iconHTML

    Automation of the analytical specimen processing tasks in clinical laboratories is provided by the laboratory information and automation systems. Integration of these systems increase throughput, lower the cost, improve and ensure quality standards, and store and keep data for knowledge maintenance and mining. Among several important tasks, the key one concerns with data acquisition from analyzers... View full abstract»

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  • A multidimensional index structure for fuzzy spatial databases

    Publication Year: 2001, Page(s):2434 - 2439 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB) | HTML iconHTML

    The current index structures are not appropriate for representing and efficiently accessing fuzzy data, especially for fuzzy spatial data existing in many complex applications such as geographic information systems (GISs), multimedia database systems, decision support systems, etc. For the effectiveness of fuzzy databases non-fuzzy and fuzzy data should be indexed together. Therefore, a multidimen... View full abstract»

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  • On the combination of fuzzy logic and Kohonen nets

    Publication Year: 2001, Page(s):2144 - 2149 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB) | HTML iconHTML

    Several ways of combining concepts of fuzzy set theory with connectionist methods are known. We focus on the use of fuzzy numbers in neural networks. Our goal is to create a fully fuzzified self-organizing-map, which receives fuzzy numbers as inputs and computes its output employing fuzzy weights. We want to extend results about goodness prediction, that exist for fuzzified multilayer perceptrons ... View full abstract»

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  • Gradual rules and extended functional dependencies-a discussion

    Publication Year: 2001, Page(s):1949 - 1954 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB) | HTML iconHTML

    This paper discusses the interest of gradual rules for the representation of extended functional dependencies, in classical relational databases, in the particular case of continuous domains for some attributes. First, it shows that classical rules can represent imprecise functional dependencies, but that they are not adapted to the case of a large amount of noisy or uncertain data. Then, the case... View full abstract»

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  • Satisfaction measure for result in fuzzy reasoning and retrieval an attempt towards the application of fuzzy logic as the "brainware" of the Internet

    Publication Year: 2001, Page(s):2200 - 2205 vol.4
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB) | HTML iconHTML

    Reasoning and retrieval based on uncertain information and imprecise knowledge is often requested in designing and developing intelligent information systems. As a recent trend, the ideas of fuzzy logic have also been widely used in searching the Internet. An important issue for these applications is to equip the reasoning and retrieval with the capability of transmitting the uncertainty from impr... View full abstract»

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  • Representing continuous spatial variation of geographic phenomena using fuzzy logic

    Publication Year: 2001, Page(s):2382 - 2387 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (676 KB) | HTML iconHTML

    Variation of geographical phenomena is often gradual and continuous over space. A discrete model based on Boolean logic has been used to portray (map) this gradual and continuous spatial variation. Due to the limitation of this discrete model, spatial variation of geographic phenomena is portrayed by discrete and distinct spatial units, and changes only occur at the boundaries of these units. As a... View full abstract»

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  • Temporal knowledge discovery in time-series medical databases based on fuzzy-rough reasoning

    Publication Year: 2001, Page(s):1973 - 1978 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB) | HTML iconHTML

    Since hospital information systems have been introduced in large hospitals, a large amount of data, including laboratory examinations, have been stored as temporal databases. The characteristics of these temporal databases are outlined. (1) Each record is inhomogeneous with respect to time-series, including short-term effects and long-term effects. (2) Each record has more than 1000 attributes whe... View full abstract»

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  • Maneuvering target tracking by using particle filter

    Publication Year: 2001, Page(s):2223 - 2228 vol.4
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB) | HTML iconHTML

    The aim of this research is to track a maneuvering target, e.g. a ship, an aircraft, and so on. We use a state-space representation to model this situation. The dynamics of the target is represented by a system model, firstly in continuous time, though a discretized system model is actually to be used in practice. The position of the target is measured by radar, and this process is described by a ... View full abstract»

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