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Fuzzy Information Processing Society Biannual Conference, 1994. Industrial Fuzzy Control and Intelligent Systems Conference, and the NASA Joint Technology Workshop on Neural Networks and Fuzzy Logic,

Date 18-21 Dec. 1994

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Displaying Results 1 - 25 of 104
  • NAFIPS/IFIS/NASA '94. Proceedings of the First International Joint Conference of The North American Fuzzy Information Processing Society Biannual Conference. The Industrial Fuzzy Control and Intelligent Systems Conference, and the NASA Joint Technology Workshop on Neural Networks and Fuzzy Logic

    Publication Year: 1994
    Request permission for commercial reuse | PDF file iconPDF (273 KB)
    Freely Available from IEEE
  • Neurofuzzy symbolic systems and pattern recognition

    Publication Year: 1994, Page(s):421 - 422
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    It has been shown that information transmission from the pre to the post-synaptic neurons involves releasing specific pre-synaptic chemical messages (tokens) called transmitters (t) to binding defined post-synaptic molecules (tokens) called receptors (r). This t/r binding activates, in turn, some other postsynaptic molecules called controllers (c), whose purpose is to exercise some action upon the... View full abstract»

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  • Automatic generation of fuzzy rulebase for robot arm posture selection

    Publication Year: 1994, Page(s):436 - 440
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    When performing a manipulation task, through experience we place our arm in a posture which is best suited for performing that task. Although indices for quantifying the optimality of robot arm postures with respect to task requirements have been formulated in the past, they have not been used in practice for posture selection. The primary reason for this lack of use is that finding the optimal po... View full abstract»

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  • Fuzzy logic applied to voltage regulation

    Publication Year: 1994, Page(s):141 - 142
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB)

    This paper presents a fuzzy controller for power conditioners (FCPC); this controller changes the phase angle of a bank of thyristors, which modifies the magnetic flux of an static voltage compensator, in order to obtain the desired output voltage regulation View full abstract»

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  • When to stop testing software? A fuzzy interval approach

    Publication Year: 1994, Page(s):182 - 186
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    the experience of many programmers shows that it is actually impossible to extract all the faults from system-type software, that is commonly involved in resource contention, or from the programs with a sophisticated user interface. Also, it is necessary to estimate the time interval during which the remaining faults will not influence the program. This problem is vital for estimating the cost of ... View full abstract»

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  • Computing an appropriate control strategy based only on a given plant's rule-based model is NP-hard

    Publication Year: 1994, Page(s):331 - 332
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (128 KB)

    Traditional control starts with the description (i.e. model) of a plant, and an objective to be achieved. Based on this information, methods of traditional control theory enables one to compute a control strategy. In fuzzy control, one usually does not have an accurate model of the plant and one often can not express an objective in precise mathematical terms. Instead, one has a collection of "fuz... View full abstract»

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  • Fuzzy control for behavior-based mobile robots

    Publication Year: 1994, Page(s):209 - 213
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    This paper presents an implemented control architecture for behavior-based mobile robots in partially known environments. In addition to coordinating primitive behaviors, the fuzzy controller is able to integrate reactive behaviors with goal-directed planning capabilities so that the robot can reach its goals more efficiently. The fuzzy controller was tested on a mobile robot equipped with sonars ... View full abstract»

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  • A smart instrument to evaluate roofing system performance in hurricanes

    Publication Year: 1994, Page(s):275 - 278
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    A recently developed decision support system to aid nonengineering professionals in evaluating the quality of roofing systems for commercial and residential buildings is described. A description of the requirements, theoretical background, and architecture of the system is provided. The accompanying computer program is also described. Finally, the predicted quality levels of thirteen roofing syste... View full abstract»

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  • The necessity to check consistency of expert knowledge explains the current form of fuzzy control

    Publication Year: 1994, Page(s):180 - 181
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    In the majority of fuzzy control systems, the rules (that describe an appropriate control u for given inputs x1, ..., xn ) are of the form “If A1(x1), ..., A n(zn), then B(u)”. This is not the most general form of fuzzy control. In this paper, we show that this special form of the rules can be deduced from the necessity ... View full abstract»

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  • Genetic fuzzy clustering

    Publication Year: 1994, Page(s):411 - 415
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    This paper describes a genetic guided fuzzy clustering algorithm. The fuzzy-c-means functional Jm is used as the fitness function. In two domains the approach is shown to avoid some higher values of Jm to which the fuzzy-c-means algorithm will converge under some initializations. Hence, the genetic guided approach shows promise as a clustering tool View full abstract»

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  • Interval valued fuzzy sets and fuzzy measures

    Publication Year: 1994, Page(s):317 - 321
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    Interval valued fuzzy set generated by fuzzy disjunctive and conjunctive normal forms are proposed to be a model of type II fuzzy sets to represent the second order semantic uncertainty realized by the combination of two or more fuzzy, vague, linguistic concepts by linguistic connectives. Fuzzy measures over the interval valued fuzzy sets provide useful information such as “non-specificity&r... View full abstract»

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  • Embedded fuzzy logic-based wall-following behavior for mobile robot navigation

    Publication Year: 1994, Page(s):329 - 330
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    The synthesis of a fuzzy logic controller that provides a small mobile robot with the capability to exhibit a wall-following behavior is described. A general account of the procedure is given with emphasis placed on the embedded realization of the fuzzy controller and its feasibility using commercially available tools View full abstract»

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  • Building Sugeno-type models using fuzzy discretization and orthogonal parameter estimation techniques

    Publication Year: 1994, Page(s):201 - 206
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    This paper develops a new approach to building Sugeno-type models. The essential idea is to separate premise identification from consequence identification, while these are mutually related in the previous methods. A fuzzy discretization technique is suggested to determine the premise of the model, and an orthogonal estimator is provided to identify the consequence of the model. The orthogonal est... View full abstract»

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  • Bag language speeds up fuzzy interval computations

    Publication Year: 1994, Page(s):398 - 399
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    As applications of fuzzy computations in the real world become more common, it will be desirable that new software performs as quickly and efficiently as possible. We will use related findings to show how such speed and efficiency can be achieved in bag languages View full abstract»

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  • Cognitive categorization revisited: extending interval valued fuzzy sets as simulation tools for concept combination

    Publication Year: 1994, Page(s):400 - 404
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    In this paper a structure called evidence set is proposed. It is based on the extension of interval valued fuzzy sets by utilizing the theory of fuzzy measures, in particular, the Dempster-Shafer theory of evidence. These new structures allow us to build better simulations of human cognitive categorization and concept combination processes, since not only is the spectrum of uncertainty forms bette... View full abstract»

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  • Gain scheduling based fuzzy controller design

    Publication Year: 1994, Page(s):101 - 105
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    This paper presents a gain scheduling based approach to the design of fuzzy controllers. We demonstrate that the Sugeno fuzzy controller is in fact a special case of gain scheduling where the feedback gains are adjusted (“scheduled”) via membership functions in fuzzy if-then rules. When the desired gains at various operating points are available, we can apply the ANFIS learning algorit... View full abstract»

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  • Teaching kids how to ride a bike [fuzzy control]

    Publication Year: 1994, Page(s):175 - 176
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    The usual way to teach a kid to ride a bike is by using training wheels. This creates a somewhat stable bike so the kid will hardly ever fall. After the kid has mastered a bike with training wheels, the wheels are taken away, and the second stage of learning starts. At this moment, since the kid is not completely prepared for a bike without training wheels, the kid may (and does) fall. So we eithe... View full abstract»

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  • `On the road to Damascus': fuzzy logic and management practice

    Publication Year: 1994, Page(s):449 - 450
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    We are in a post modern era, characterised by an increasing awareness of the complex interdependence of our social and physical worlds, and by a diminishing faith in traditional science. Organisational management practice is filled with paradox but Aristotelian logic sets boundaries on the possible choices for action which a manager may make without stepping across the limits of approved rationali... View full abstract»

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  • A fuzzy scheme for enterprise modeling

    Publication Year: 1994, Page(s):159 - 160
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    Complex systems are difficult to model and analyze. Enterprise modeling represents one of the most controversial and convoluted tasks. While models rely on subjective judgments, the majority of analytical work has been done by traditional methodologies. This paper analyses enterprise modeling from fuzzy systems perspective. Examples illustrate the relevance of similarity measures, in particular. D... View full abstract»

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  • A new genetic algorithm with statistical gene evaluation

    Publication Year: 1994, Page(s):409 - 410
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    A new genetic algorithm is proposed to approximately evaluate the gene rather than the chromosome using statistical techniques. Simple statistical quantities are used to find out the influence of individual gene during the evolution and suggest better choices for a gene. The statistical values are incorporated into the genetic operations in the rates for the gene crossover and mutation. The effect... View full abstract»

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  • Monotonic quantified statements and fuzzy integrals

    Publication Year: 1994, Page(s):8 - 12
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    This paper is devoted to the interpretation of quantified statements of type “Q X are A”, where Q is a fuzzy quantifier, X is a set of elements and A a fuzzy predicate. Our overall contribution is to propose a general view for the definition of fuzzy quantified statements. In the framework of this definition, a connection is then established between quantified statements and fuzzy inte... View full abstract»

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  • Commercial systems for fuzzy reasoning: a survey

    Publication Year: 1994, Page(s):121 - 126
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    We compare the fields of fuzzy process control and fuzzy reasoning, and conclude that software very suitable for process control may be at best marginally suitable for fuzzy reasoning. We discuss questions of system power and ease of use, and survey several commercial system in that light View full abstract»

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  • On weighted expectations

    Publication Year: 1994, Page(s):13 - 17
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    The classical `expected value' frequently fails to represent a `typical value' of a given multi-cluster data set. In this case the set is clustered and new quantities which replace the expected value and the standard deviation are defined. The `weighted expected value' (WEV) is computed by solving a nonlinear equation and defines a `most typical value' of the set. The `weighted deviation' (WD) is ... View full abstract»

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  • A fuzzy expert system tool used for the analysis of musical timbres

    Publication Year: 1994, Page(s):434 - 435
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    An interesting problem in music recognition is to be able to listen to any piece of music and determine which musical timbres are heard. A human expert such as a composer can achieve this recognition without any mistakes. Given the properties of timbre, the Fuzzy Expert System Tool (FEST) can determine all the instruments being played in a given piece of music due to FEST's ability to produce mult... View full abstract»

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  • Specifying vague requirements with a fuzzy logic based modeling framework

    Publication Year: 1994, Page(s):291 - 295
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    Proposes a faceted requirement classification scheme for analyzing heterogeneous requirements. The representation of vague requirements is based on the canonical form in test-score semantics and an extension of the notion of soft conditions. The trade-offs analysis of conflicting soft requirements is conducted using fuzzy multi-criteria optimization techniques. The proposed approach provide a fram... View full abstract»

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