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3rd International conference on Computational Intelligence and Multimedia Applications, ICCIMA 1999

作者： Frost, Fred Karri, Vishy Comalco Aluminium Limited Bell BayTAS Australia University of Tasmania School of Science and Engineering HobartTAS7001 Australia

ISBN: (纸本)0769503004

Neural networks, due to their excellent capabilities for modelling process behaviour, are gaining precedence over traditional empirical modelling techniques, such as statistical methods. While neural networks have good ability to map any reasonable continuous function, they do not easily explain how the inputs are related to an output, and also whether the selected inputs have any significant relationship with an output. There is quite often a need to identify some order of influence of the input variables on the output variable. In this paper, a technique for determining the order of influence of the n elements of the input vector on the m elements of the output vector is presented and discussed. While a sample mathematical function is used to introduce the technique, a more practical application of this method in the aluminium smelting industry is considered. It is shown that, using a sensitivity analysis on the backpropagation (BP) algorithm, the degree of influence of the input parameters on the output error can be successfully estimated. © 1999 IEEE.

关键词： Sensitivity analysis

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modelling interface agents for personality-based behaviour

Modelling interface agents for personality-based behaviour

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1999 IEEE International conference on Systems, Man, and Cybernetics 'human Communication and Cybernetics'

作者： Arafa, Yasmine Charlton, Patricia Mamdani, Abe Imperial Coll of Science Technology and Medicine London United Kingdom

Visually synthesising the metaphor of life-like visual Personal Service Assistants (PSAs) is the focus of much current research. Often the complex visual requirements of the PSA means that little attention is given to the underlying infrastructure necessary to support the reasoning requirements of such a metaphor. This lack of support, from a software engineering perspective, means that many designs and implementations are application specific thus re-use of the designs and implementations are limited. To address this problem our research goes behind the scenes of visual stage representation to provide a technical infrastructure enabling the creation of more believable life-like interface characters based on a structured meta-representation called the Asset Description Language (ADL). The language is extended to enable agents to communicate emotions with other agents (software or human). Hence this explicit representation of emotions within the communication means that an agent can reason about these emotions and respond in an appropriate manner either visually to a human or through communication with another agent. This response permits an agent to exhibit personality. Through the provision of a structured meta-representation we aim to evaluate the effect personality-based behaviour on interactive user interfaces as well as on other service agents in a multi-agent environment. As the representation provides some basic general design primitives which are not application specific means that re-use of our infrastructure by other developers is possible.

关键词： User interfaces

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Lattice gas modelling in thermal spraying

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SURFACE engineering 1999年第3期15卷 191-194页

作者： Jeandin, M Borit, F Guipont, V Decker, L Jeulin, D Suzuki, M Sodeoka, S Ecole Mines Ctr Plasma Proc F-91003 Evry France Ecole Mines Ctr Morphol Math F-77305 Fontainebleau France Osaka Natl Res Inst AIST Ikeda Osaka 563 Japan

This report is an edited transcript of a talk presented by Michel Jeandin at the 12th International conference on Surface Modification Technologies held in Rosemont, IL, USA on 12-15 October 1998. It describes a two-dimensional original model developed at the Ecole des Mines de Paris to simulate the deposition of droplets by plasma spraying onto a substrate. The new model is based on a lattice gas automaton which can reproduce the hydrodynamic behaviour of fluids. Various applications of the model are discussed, especially to composites.

关键词： mathematical models

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Hybrid modelling and simulation of the human respiratory system

Hybrid modelling and simulation of the human respiratory sys...

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Annual International conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： B.R. Bracio F. Breitnecker J. Krocza Department of Electrical Engineering University of Idaho Moscow USA ARCS-Medical and Rehabilitation Engineering Wien Austria

This paper presents a simulation model of the human respiratory system. A combination out of well proved mathematical equations on one hand and an extended rule base on the other enables the dynamic simulation of several interactions of the respiratory system. For the implementation of the rule base a finite state machine technique had been used. The derived comprehensive simulation model is used to study and analyze the respiratory dynamics for teaching purposes.

关键词： humans Respiratory system Automata Analytical models mathematical model Predictive models Equations Performance analysis Education Carbon dioxide

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Incorporating human factors concerns into the design and safety engineering of complex control systems

IEE Conference Publication

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IEE conference Publication 1999年第463期 51-56页

作者： Good, Jason Blandford, Ann Middlesex Univ London United Kingdom

A major concern for those designing safety-critical, high-reliability, or dependable control systems is ensuring that they meet the same rigorous safety standards as the underlying complex systems which they control. As hardware components have become more reliable, and their properties better understood, it has become easier to make safety claims about these aspects of a system. Even for software components, which have benefited from structured and formal methods to specify their intended behaviour and rigorous verification and validation techniques to test this, safety claims are now possible. Usability issues, particularly operator errors, are an Achilles Heel for safety engineering. Systematic approaches to the inclusion of human factors concerns in rigorous safety engineering practice are long overdue. In this paper we draw on our recent experience of the design phase of a major communications system, and discuss why simply passing new isolated techniques into the safety arena is insufficient. We go on to demonstrate how insights from an established cognitive engineering technique (Programmable User modelling) could be fully incorporated into existing safety engineering practice.

关键词： Large scale systems

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Incorporating human factors concerns into the design and safety engineering of complex control systems

Incorporating human factors concerns into the design and saf...

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1999 International conference on human Interfaces in Control Rooms, Cockpits and Command Centres

作者： J. Good A. Blandford Middlesex University UK

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modelling of residual stresses in weld simulated restrained C-Mn steel specimens

Proceedings of the International Offshore and Polar Engineer...

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Proceedings of the International Offshore and Polar engineering conference 1999年 4卷 187-194页

作者： Gundersen, O. Zhang, Z. Volden, L. Rorvik, G. Akselsen, O.M. SINTEF Materials Technology Trondheim Norway

In welding of structural steels, the highly localized transient heat input contributes to the formation of permanent residual stresses and deformations after welding. Residual stresses can affect the integrity and the service behaviour of a welded structure. As known from the literature, a specially designed test rig (the Satoh test) can be used for assessment of residual stresses for given welding conditions characterized by the peak temperature Tp and cooling time Δt8/5 of the thermal cycle. In the present work, the Satoh test was used to monitor the mechanical forces during weld thermal cycling of a C-Mn steel. A mathematical framework for evaluating residual stresses based on the Satoh test is presented. The thermal- and microstructure fields are solved as a coupled problem. An elasto-plastic mechanical analysis with temperature dependent properties is performed by using the temperature field as a load. The ABAQUS finite element code was used in the simulations.

关键词： Welded steel structures

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Identifying lake longer-term dynamics via fuzzy relations and non-linear Kalman filters

Identifying lake longer-term dynamics via fuzzy relations an...

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European Control conference (ECC)

作者： Tatjana D. Kolemishevska-Gugulovska Georgi M. Dimirovski A. Talha Dinibutun Norman E. Gough ASE Institute Faculty of Electrical Engineering Sts. Cyril & Methodius University P.O.B. 574 MK-91000 Skopje Republic of Macedonia University of Wolverhampton Wolverhampton West Midlands GB Dogus Universitesi Istanbul TR

A novel simulation modelling technique that may be used to reconstruct or predict longer-term water level dynamics of lakes and reservoirs has been elaborated. On the grounds of the conservation law and a kind of self-regulation property of these lakes, by using Kalman filters for the unmeasurable part of hydrologic-cycle dynamical path and output observation equation in traditional and in fuzzy-relational a simulation modelling technique was developed that is believed to have wide applicability. It has been applied to reconstruct successfully the behaviour of Ohridean and Prespanean Lakes during various time periods, despite the available records are interrupted, uncertain and unreliable due to historical circumstances.

关键词： Lakes Biological system modeling mathematical model Water resources Data models Computational modeling

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Artificial neural networks for data modelling of a plastic injection moulding process

Artificial neural networks for data modelling of a plastic i...

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International conference on Neural Information Processing

作者： N. Costa B. Ribeiro Department de Engineering lnformatica da Univ. de Coimbra Universidade de Coimbra Coimbra Portugal

Injection moulding is the most common manufacturing method for the production of high-volume plastic parts. Although theoretically simple, the existence of strong nonlinearities and the unpredictability that is inherent in the raw material used transforms the method into a quite complex process. The development of a process model, based on the analysis of the mathematical relationships between the variables, although possible, would be extremely difficult. Artificial neural networks, due to their capabilities and simplicity, are an attractive approach. Several training algorithms are presented in this paper, from which resilient backpropagation has been used to train a neural network that is capable of modelling the process behaviour. Because of the complexity involved, due to the large number of available variables, principal component analysis has been applied to reduce the dimensionality of the model to be learned by the neural networks.

关键词： Artificial neural networks Plastics Injection molding Manufacturing Production Raw materials mathematical model Backpropagation algorithms Principal component analysis Neural networks

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modelling interface agents for personality-based behaviour

Modelling interface agents for personality-based behaviour

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IEEE International conference on Systems, Man and Cybernetics

作者： Y. Arafa P. Charlton A. Mamdani Department of Electrical and Electronic Engineering Imperial College of Science and Technology London UK

Visually synthesising the metaphor of life-like visual personal service assistants (PSAs) is the focus of much current research. Often the complex visual requirements of the PSA means that little attention is given to the underlying infrastructure necessary to support the reasoning requirements of such a metaphor. This lack of support, from a software engineering perspective, means that many designs and implementations are application specific thus re-use of the designs and implementations are limited. To address this problem our research goes behind the scenes of visual stage representation to provide a technical infrastructure enabling the creation of more believable life-like interface characters based on a structured meta-representation called the Asset Description Language (ADL). The language is extended to enable agents to communicate emotions with other agents (software or human). Hence this explicit representation of emotions within the communication means that an agent can reason about these emotions and respond in an appropriate manner either visually to a human or through communication with another agent. This response permits an agent to exhibit personality. Through the provision of a structured meta-representation we aim to evaluate the effect personality-based behaviour on interactive user interfaces as well as on other service agents in a multi-agent environment. As the representation provides some basic general design primitives which are not application specific means that re-use of our infrastructure by other developers is possible.

关键词： Anthropomorphism Application software humans Computer interfaces User interfaces Animation Educational institutions Software engineering Layout Multiagent systems

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