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Systems, Man, and Cybernetics, 1997. Computational Cybernetics and Simulation., 1997 IEEE International Conference on

Date 12-15 Oct. 1997

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  • 1997 IEEE International Conference On Systems, Man, And Cybernetics

    Publication Year: 1997, Page(s):0_3 - 0_46
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    Freely Available from IEEE
  • Author index

    Publication Year: 1997, Page(s):0_47 - 0_60
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    Freely Available from IEEE
  • Power command enhancement in mobile communication systems using an embedded fuzzy unit

    Publication Year: 1997, Page(s):4364 - 4369 vol.5
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (594 KB)

    We propose a fuzzy logic-based power command enhancement scheme for the mobile station of a cellular phone system. By defining the necessary linguistic variables of the power commands and corresponding fuzzy inference rules, an embedded fuzzy unit (EFU) is set up. The role of our EFU is to produce appropriate digital power commands instead of one-bit discrete commands directly obtained from the ba... View full abstract»

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  • Weight value testing in artificial neural networks

    Publication Year: 1997, Page(s):4023 - 4028 vol.5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    This paper presents a method for testing ANN interconnection weight values in programmable ANNs. The methodology requires separate weights for excitatory and inhibitory contributions to a neuron's activation. In the test the excitatory and inhibitory weights are set to be equal, producing no net contribution to the activation. Any faults in the weight values result in an imbalance that is amplifie... View full abstract»

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  • On the inverse kinematics and statics of cable-suspended robots

    Publication Year: 1997, Page(s):4291 - 4296 vol.5
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    The paper examines some issues concerning the inverse kinematics and statics of cable suspended robots and studies some of the inherent workspace limitations that result from the fact that the robot is cable actuated. The paper presents a necessary and sufficient condition for a cable suspended robot to be capable of achieving static equilibrium at a given configuration. This condition is based on... View full abstract»

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  • An efficient fractal image compression method

    Publication Year: 1997, Page(s):4204 - 4206 vol.5
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    We present an efficient fractal image compression method with adaptive rhomb partition, based on the visual property that our eyes are more sensitive to horizontal and vertical directions, compared with diagonal ones (Kharatishvili et al., 1993). Experiment results show that reconstructed images can maintain a high image quality even with a high compression ratio View full abstract»

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  • A topological map based navigation system for mobile robotics

    Publication Year: 1997, Page(s):4394 - 4399 vol.5
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    We discuss two forms of cognitive map which are commonly used in mobile robotics when navigation requirements and environmental conditions make them appropriate; namely global metric, and topological. Whilst the former is a more powerful representational form which is suitable for building route plans in static environments, the latter is typically much less computationally intense and may be embe... View full abstract»

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  • Dynamic analysis in variable structure position/force hybrid control of manipulators

    Publication Year: 1997, Page(s):4309 - 4314 vol.5
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    The article studies the implementation of a variable structure algorithm in the position/force hybrid control of robotic manipulators. The robustness and performance of the system are analysed in terms of time responses and limit cycle occurrence. Also considered is the stability limit relative to different system operating points and the adoption of multirate sampling frequencies View full abstract»

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  • Robust control of uncertain measure differential systems with delay: Riccati-like approach

    Publication Year: 1997, Page(s):4332 - 4336 vol.5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    In this paper, we present a novel design approach of robust controller for a class of measure differential systems with delay. To design the controller and analyze the stability of closed-loop dynamics, the Riccati-like approach is employed and a novel transformation of state is introduced. In our approach, it is unnecessary to assume the norm bound of constant matrix of state variable x(t-r) to b... View full abstract»

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  • Persistency and weak persistency in partial order based analysis

    Publication Year: 1997, Page(s):4285 - 4290 vol.5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    The purpose of the paper is to show how the results of Petri net theory can be applied to analysis of concurrent systems. State space explosion is known as one of the serious problems in the verification of concurrent systems. We focus on the partial order method, which was proposed to overcome this problem. In this method, a partial order defined on the set of transitions is used to obtain a redu... View full abstract»

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  • Control rule acquisition for an arm wrestling robot

    Publication Year: 1997, Page(s):4227 - 4231 vol.5
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    Describes knowledge acquisition for an arm-wrestling virtual reality (VR) system. The ultimate goal of this research is to obtain control rules which give the impression that the operator is arm wrestling against a real person and to analyze what factors enhance this. Acquiring the rules to win games consists of two steps (the control rules are obtained in two stages because it is difficult to obt... View full abstract»

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  • KOLEM: studies on evolution of expertise in a society of learning agents

    Publication Year: 1997, Page(s):4465 - 4470 vol.5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    A society of agents is one in which many agents coexist and interact with each other while carrying out their tasks. Each agent builds a certain level of expertise. Thus the interactions among agents would help each agent to carry out its task better by tapping into the collective knowledge assets of the society. Agents may differ in the ways in which they interact with other agents. As the societ... View full abstract»

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  • An image processing approach to underwater acoustic signal classification

    Publication Year: 1997, Page(s):4198 - 4203 vol.5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    This work focuses on the use of image processing methods to detect and classify underwater acoustic signals. The time-frequency spectra of underwater acoustic signals are usually converted to lofargrams for display purposes. These lofargrams exhibit texture-like characteristics. Moving targets exhibit ramps while ambient noise has a noisy pattern. Hence, these can be detected using textural patter... View full abstract»

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  • Minimising the latency induced by consistency control, within a large scale multi-user distributed virtual reality system

    Publication Year: 1997, Page(s):4492 - 4497 vol.5
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    Where users are interacting in a distributed virtual environment, the actions of each user must be observed by peers with sufficient consistency and within a limited delay so as not to be detrimental to the interaction. The consistency control issue may be split into three parts: update control; consistent enactment and evolution of events; and causal consistency. The delay in the presentation of ... View full abstract»

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  • Supporting situation awareness in aviation systems

    Publication Year: 1997, Page(s):4177 - 4181 vol.5
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    Situation awareness is recognized as one of the most critical aspects in the aviation domain. Many features of our high technology environment can act to subtly degrade situation awareness, however, including high levels of complexity, out-of-the-loop performance decrements resulting from automation, and lack of synergy in human and machine decision making. An approach that seeks to design for sit... View full abstract»

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  • Integration of the Space Shuttle remote manipulator system virtual environment simulation

    Publication Year: 1997, Page(s):4158 - 4162 vol.5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    The assembly of structures, such as the International Space Station, in orbit requires precise alignment of telerobotically manipulated component modules. The alignment process is often made more difficult by inability to simultaneously observe and control the components to be positioned. Video observation of the process from a fixed vantage point is a less than optimal solution. A real-time, oper... View full abstract»

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  • On information processing capacity of anti-aircraft tactic command and control systems

    Publication Year: 1997, Page(s):4337 - 4341 vol.5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    A powerful method for the modeling of the task processing of anti-aircraft tactic command and control systems (AATCCS) via stochastic Petri net (SPN) tool is proposed and discussed. The principle of the analysis of task processing capacity for a discrete event system based on SPN model is established. The task processing model of a generic typical anti-aircraft tactic C2 systems with two-level com... View full abstract»

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  • Trajectory optimization and control for robot manipulator using evolution strategy and fuzzy logic

    Publication Year: 1997, Page(s):4320 - 4325 vol.5
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    Robot manipulators have some physical constraints such as the limits of the position, velocity, acceleration and jerk. In order to increase the productivity, it is desirable to drive the manipulators as fast as possible. The problem can be formulated as the time optimal control problem under the given physical constraints. But it is very difficult to obtain the exact solution of the time optimal c... View full abstract»

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  • Inductive learning as a fusion engine for mine detection

    Publication Year: 1997, Page(s):4133 - 4138 vol.5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    Semiotics is defined by some researchers as “the study of the appearance (visual or otherwise) meaning, and use of symbols and symbol systems”. Semiotic fusion of data from multiple sensory sources is a potential solution to the problem of landmine detection. This turns out to be significant, because notwithstanding the diversity of sensor technologies being used to attack the problem,... View full abstract»

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  • Manufacturing-driven design

    Publication Year: 1997, Page(s):4436 - 4441 vol.5
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    The past decades have seen significant research and practice on new information technology for manufacturing enterprises, including computer-integrated manufacturing (CIM), concurrent engineering (CE), and agile manufacturing. The ideal is always a pursuit of adaptively integrated design, manufacturing, and business processes linking the parts fabrication, factory production, and product developme... View full abstract»

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  • A concurrency characteristic in Petri net unfolding

    Publication Year: 1997, Page(s):4266 - 4273 vol.5
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    Unfolding, originally introduced by McMillan (1995), is gaining ground as a partial-order based method for the verification of concurrent systems without state-space explosion. However, it can be exposed to redundancy, which may increase its size exponentially. So far, there have been trials to reduce such redundancy resulting from conflicts by improving McMillan's cut-off criterion. In this paper... View full abstract»

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  • A neural network model for spoken word recognition

    Publication Year: 1997, Page(s):4029 - 4034 vol.5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    In this paper, we propose a neural approach to the speaker-independent word recognition, based on the algorithms of dynamic time warping (DTW) and fuzzy ARTMAP. DTW has some drawbacks: (1) It is space and time consuming for a large set of training patterns. (2) It gives an equal importance to each frame of a pattern. To obtain better performance, the training patterns need to be prefiltered by hum... View full abstract»

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  • An approach for the teleoperator control of the Stanford/JPL Dexterous Hand

    Publication Year: 1997, Page(s):4303 - 4308 vol.5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    Developing a telerobot control system for a dexterous hand requires the integration of two very complex systems. The paper presents an approach for controlling the Stanford/JPL Dexterous Hand through a communications network, using an EXOS Dexterous Hand Master. The two major problems to be solved were: mapping of the output of the Hand Master into the corresponding input for the Dexterous Hand Co... View full abstract»

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  • Measuring asymmetries of skin lesions

    Publication Year: 1997, Page(s):4211 - 4216 vol.5
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    Since 1994, a clinical study has been established to digitize melanocytic lesions from patients who are referred to the Colored Pigment Lesion Clinic in the University of British Columbia. In the past, we have been using circularity as the main feature to reflect the asymmetrical aspect of skin lesions. However, its significance often depends on the accuracy of image segmentation while the borders... View full abstract»

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  • Towards a modular timing analysis of real-time software systems

    Publication Year: 1997, Page(s):4442 - 4447 vol.5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    In this paper we present a timing Petri net extension based on fuzzy set theory to perform timing analysis of software systems. A modular timing analysis is defined by using a structure tool named G-Net. Finally, we make some considerations about the integration of this timing extension and G-CPN, an object-based Petri net View full abstract»

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