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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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  • At the crossroads of fuzzy Galois lattice and information retrieval

    Publication Year: 2001, Page(s):2458 - 2463 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB) | HTML iconHTML

    The authors propose a new algorithm for generating a fuzzy Galois lattice from a fuzzy binary relation. As a practical application of the fuzzy Galois lattice, we show that it can be used as an underlying basic structure access, for providing relevant additional information to a user asking queries to an indexed documentary database View full abstract»

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  • A first approach to possibilistic queries addressed to possibilistic databases

    Publication Year: 2001, Page(s):2452 - 2457 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB) | HTML iconHTML

    It is now recognized that querying databases containing imprecise information raises several problems, including that of complexity. The authors consider a new kind of query, called possibilistic queries, of the form "to what extent is it possible that a given tuple t belongs to the answer of Q (a regular relational query)". The paper is a first attempt to show that a reasonable complexity can be ... View full abstract»

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  • Why spatial databases need fuzziness

    Publication Year: 2001, Page(s):2446 - 2451 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB) | HTML iconHTML

    Geographic information systems (GIS) and spatial databases are inherently suited for fuzziness. Because the only accurate storage and representation of a spatial object can be on a one-to-one scale, there must be a level of uncertainty and/or fuzziness introduced into the model. Also, the result of a query must eventually be represented to the user. This may be done in the form of textual retrieva... 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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  • 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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  • Construction of dynamic fuzzy if-then rules through genetic reinforcement learning for temporal problems solving

    Publication Year: 2001, Page(s):2341 - 2346 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB) | HTML iconHTML

    In this paper, a genetic algorithm (GA) based dynamic fuzzy network design approach is proposed. First, a dynamic fuzzy network (DyFN) constituted from a series of dynamic fuzzy if-then rules is introduced. One characteristic of DyFN is its ability to deal with temporal problems. Then, GA is adopted into the design process as a means of allowing the application of DyFN in situations where gradient... 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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  • Use of intervals for soft classification in fuzzy neural networks

    Publication Year: 2001, Page(s):2003 - 2007 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB) | HTML iconHTML

    Neural networks can be used to classify input data into one of a given set of categories. With limited training sets, crisp neural network results are predictably poor. Incorporation of fuzzy techniques improves performance in these cases. Even though fuzzy neural networks classify imprecise data quite well, the incorporation of a soft decision classification lowers the error rate substantially. T... 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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  • Fuzzy extensions for relationships in a generalized object model

    Publication Year: 2001, Page(s):2335 - 2340 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB) | HTML iconHTML

    To better model the dynamic and uncertain real world; many researchers have proposed approaches for integrating fuzzy set theory into the knowledge representation methods used in data modeling. This paper presents an initial recommendation for the primary relationships of a generalized object model that would incorporate fuzzy set theory as a tool to use in the task of object modeling 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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  • Interval and fuzzy techniques for plan checking under uncertainty

    Publication Year: 2001, Page(s):1997 - 2002 vol.4
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    The main problem of planning is to find a sequence of actions that an agent must perform to achieve a given objective. An important part of planning is checking whether a given plan achieves the desired objective. Historically, in AI, the planning and plan checking problems were mainly formulated and solved in a deterministic environment, when the initial state is known precisely and when the resu... 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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  • Application of genetic algorithms to hypersonic flight control

    Publication Year: 2001, Page(s):2428 - 2433 vol.4
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB) | HTML iconHTML

    The paper presents an application of genetic algorithms to the design of a longitudinal flight controller for a hypersonic accelerator vehicle which is to be used to launch small satellites. A feature of hypersonic air-breathing flight vehicles is the high level of engine integration with the airframe. As a result, maintenance of vehicle attitude is not simply an issue of stability, but also one o... View full abstract»

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  • The application of level-2 fuzzy sets in fuzzy and uncertain data modeling

    Publication Year: 2001, Page(s):2329 - 2334 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB) | HTML iconHTML

    A formal framework for the uniform representation and manipulation of fuzzy and/or uncertain data is presented. This framework can be used within the context of (the formal definition of) e.g. fuzzy and uncertain databases and knowledge bases. The presented framework is based on the definition of a generalized type system, which is a generalization of a crisp type system and establishes the defini... View full abstract»

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  • Lattice type fuzzy order and closure operators in fuzzy ordered sets

    Publication Year: 2001, Page(s):2281 - 2286 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB) | HTML iconHTML

    Complete lattices and closure operators in ordered sets are considered from the point of view of fuzzy logic. A typical example of a fuzzy order is the graded subsethood of fuzzy sets. Graded subsethood makes the set of all fuzzy sets in a given universe into a completely lattice fuzzy ordered set (i.e. a complete lattice in fuzzy setting). Another example of a completely lattice fuzzy ordered set... 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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  • Fuzzy techniques for multiple criteria decision making in GIS

    Publication Year: 2001, Page(s):2376 - 2381 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB) | HTML iconHTML

    Spatial decision making is a fundamental function of contemporary geographic information systems (GIS). One of the most fertile GIS development areas is integrating multiple criteria decision models (MCDM) into GIS querying mechanisms. The classic approach for this integration has been to use Boolean techniques of MCDM with crisp representations of spatial objects (features) to produce static maps... View full abstract»

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  • Why unary and binary operations in logic: general result motivated by interval-valued logics

    Publication Year: 2001, Page(s):1991 - 1996 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB) | HTML iconHTML

    Traditionally, in logic, only unary and binary operations are used as basic ones-e.g., "not", "and", "or"-while the only ternary (and higher order) operations are the operations which come from a combination of unary and binary ones. For the classical logic, with the binary set of truth values {0,1}, the possibility to express an arbitrary operation in terms of unary and binary ones is well known:... 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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  • Linguistic modifiers and measures of similarity or resemblance

    Publication Year: 2001, Page(s):2195 - 2199 vol.4
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB) | HTML iconHTML

    On the one hand, linguistic modifiers can be used to express imprecise values of variables which are described around a given fuzzy set. On the other hand, measures of comparison of fuzzy sets, such as measures of satisfiability or resemblance for instance, enable us to establish the proximity between two imprecise values of variables. A formal connection between modifiers and measures of comparis... View full abstract»

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  • Human color impression model for well-ordered color signal sequence with minimum distance

    Publication Year: 2001, Page(s):2253 - 2258 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB) | HTML iconHTML

    We examine how a seven-color cyclic sequence affects human color impressions. In order to investigate different effects of two sequences, we consider a hexagonal diagram that is a projection of RGB color space from white to black. The hexagonal diagram is roughly corresponding to the hue circle indicated by both hue and saturation in the HLS system. It is assumed that if: i) the projected route is... View full abstract»

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  • Genetic programming for life-time learning of a mobile robot

    Publication Year: 2001, Page(s):2422 - 2427 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB) | HTML iconHTML

    The paper deals with a mobile robot with structured intelligence. The robot interacts with a dynamic environment. The evaluation criteria or functions are the strategy for the behavior acquisition. Generally, it is difficult for human operators to describe the internal models of the robot because the organization of the robot is quite different from that of a human. In the optimization, the evalua... View full abstract»

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