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

作者： M. Tada T. Kanade CREST Japan Science and Technology Agency Japan Digital Human Research Center National Institute for Advanced Industrial Science and Technology Tokyo Japan Robotics Institute Carnegie Mellon University Pittsburgh USA

This paper presents the structure and performance of the newly developed fingerprint imaging system, and the outline of the image processing for the quantification of incipient slip. Incipient slip, that is considered to have direct relation with slip perception, is visualized as distortion of a fingerprint pattern. A force sensor for the contact force measurements are also newly developed. Thus this system enables highly accurate incipient slip and fingertip contact force measurements.

关键词： humans Force measurement Force control Fingerprint recognition Force sensors Image processing Deformable models mathematical model Paper technology Visualization

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modelling and application of silicon microphone systems

Modelling and application of silicon microphone systems

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Electronics Packaging Technology conference (EPTC)

作者： H.-T. Mammen U. Sturmer M. Koch H. Kohne K.-F. Becker W. John H. Reichl Department: Advanced System Engineering Fraunhofer Institute of Reliability and Microintegration (IZM) Berlin Germany

The modelling procedure described in this publication which is based on a partitioning of the total structure, allows a synthesis of the overall transfer function from simple, physics-motivated equations representing the behaviour of the substructures. Casting this into a Matlab description admits relatively easy combination with a GUI in order to obtain a modelling environment convenient for parameter studies during the development process. In parallel, some package solution for single-chip and array microphones are developed. During the model development it is not possible to consider all kinds of applications taking into account, so that some effects occur first at the finished product. Especially in a car application (handsfree set) for mobile phones occurred parasitic EMC effects. Based on this example, the EMC problems are described and solutions for circuit- as well as for package-level are presented.

关键词： Silicon mathematical model Packaging Microphone arrays Electromagnetic compatibility Transfer functions Equations Casting Graphical user interfaces Mobile handsets

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An architectural approach to mobility - the handover case study

An architectural approach to mobility - the handover case st...

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Working IEEE/IFIP conference on Software Architecture

作者： C. Oliveira M. Wermelinger J.L. Fiadeiro A. Lopes Department de Informática University Nova de Lisboa Caparica Portugal Department of Computer Science University of Leicester Leicester UK Department de Informática University de Lisboa Lisboa Portugal

Community is a formal approach to software architecture. Its main characteristics are: a precise, yet intuitive mathematical semantics based on categorical diagrams; a clear separation between computation, coordination, and distribution (including mobility); and a simple state-based language, inspired by Unity, to describe behaviour. This paper discusses the applicability of this approach to location-aware systems through the modelling of the GSM handover protocol, namely the way communication with a moving cellular phone passes from one station to another. The case study was developed with the Community Workbench, a tool that animates distributed and mobile architectural models.

关键词： Computer aided software engineering GSM Software architecture Protocols Communication system control Connectors Radio control Computer science Distributed computing Mobile communication

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Automatic generation of self-organized virtual crowd using chaotic perturbation

Automatic generation of self-organized virtual crowd using c...

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IEEE Region 10 International conference TENCON

作者： C.S. Soh P. Raveendran Z. Taha Department of Electrical Engineering University of Malaya Kuala Lumpur Malaysia Department of Engineering Design and Manufacture Faculty of Engineering University of Malaya Kuala Lumpur Malaysia

human crowds organize themselves spontaneously in a confined environment when crowd density exceeds certain critical value. This self-organization behaviour of crowd motion can be observed from formation of walking lane with similar walking direction. In this work, we proposed a modified social force model, which is originally proposed by Helbing. Individuality, irregularity and unpredictability are characteristics of crowd motion. These properties are chaotic properties of nonlinear dynamical equation. Using this equation, chaotic perturbation is introduced into social force model to take into account the properties of crowd motion. It is shown that individuality, irregularity and unpredictability of crowd motion can eventually lead the crowd into self-organization.

关键词： Chaos humans Legged locomotion Design engineering Nonlinear equations Virtual environment mathematical model Manufacturing Virtual reality Animation

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Asymptotic description of vertically fractured wells within the boundary element method

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JOURNAL OF CANADIAN PETROLEUM TECHNOLOGY 2004年第3期43卷 31-36页

作者： Kryuchkov, S Sanger, S Vertex Petr Syst Englewood CO USA

The typical parameter that is used when describing fractured wells (the ratio of width to length) has been employed for some time. The high conductivity of fractures has allowed the use of a steady-state solution for the infinitely conductive fractures;however, the transient flow modelling problem for fractures of finite conductivity has to be solved numerically. Still, the high permeability within the fracture (as compared to that of the surrounding matrix) offers additional posibilities for simplifying the transient solution for modelling the flow in the fractures. This opportunity is based on the asymptotic analysis using different time scales for the flow within the fracture and in the lower permeability surrounding rock matrix. Another difficulty related to describing fractured well behaviour arises when there is interaction with other adjacent wells or the reservoir drainage boundaries. For a finite reservoir, the fluxes on the fracture faces (panels) must be included in the solution of the problem as a whole. This can lead to very short time steps and make the numerical solution of the problem very computationally intensive. However, asymptotic analysis, based on the proximity of fractures to other objects in the reservoir, makes it possible to effectively de-couple the solution for the fracture from the solution of the reservoir as a whole, which increases computational efficiency substantially. This paper presents the conceptual grounds and mathematical details of asymptotic analysis and gives examples of calculations based on this approach. These results are compared to known numerical results employing detailed (non-asymptotic) solutions for the problem. This work illustrates how this approach may be of significant practical use to the industry as a means of conducting faster and more accurate analysis of completion methods, well plascement and spacing patterns, and other reservoir development decisions.

关键词： pressure transient testing approximation asymptotic description pressure transient analysis Upstream Oil & Gas pressure change annual technical conference exhibition hydraulic fracturing engineering fractured well Flow in porous media Formation Evaluation & Management Hydraulic Fracturing Pressure transient analysis Reservoir Fluid Dynamics

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modelling of gold (I) cyanide adsorption based on the properties of activated bagasse

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MINERALS engineering 2003年第5期16卷 421-427页

作者： Syna, N Valix, M Univ Sydney Dept Chem Engn Sydney NSW 2006 Australia

Bagasse, the fibrous residue from sugar cane milling operation, was subjected to physical activation using CO(2) to establish its suitability as a precursor for gold adsorption, specifically for the recovery of gold from cyanide medium. mathematical modelling, which correlates the effects of carbon properties on the adsorption behaviour, was conducted to formulate a basis for tailor making the adsorbent for this particular application. The developed model suggests carbon properties of alkali pH, high total surface area and small pore diameters are required for optimum adsorption capacity. The optimum adsorption capacity attained by the developed carbon in this study was 227% that of the test commercial activated carbon, which exhibited an adsorption of 101mg Au/g carbon. Hence this demonstrates bagasse as a promising precursor for the manufacture of activated carbon for gold cyanide adsorption. (C) 2003 Elsevier Science Ltd. All rights reserved.

关键词： activated carbon extractive metallurgy gold ores modelling

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Optimal alignment of BAEPs by modelling their non stationarities

Optimal alignment of BAEPs by modelling their non stationari...

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25th Annual International conference of the IEEE-engineering-in-Medicine-and-Biology-Society

作者： Cherrid, N Naït-Ali, A Siarry, P Univ Paris 12 LERISS F-94010 Creteil France

ISBN: (纸本)0780377893

In this paper, we are interested in extracting Brainstem Auditory Evoked Potentials (BAEPs) from the electroencephalogram (EEG). We focus on the problem of BAEP non-stationarities, in particular those observed in some endocochlear pathologies assuming random BAEP delays due to an abnormal behaviour of the cochlea. The technique developed in this paper, called the Time Delay Correction (TDC) method, is based on modelling BAEP non stationarities by considering each BAEP, delayed according to a specific model. The suggested mathematical model is considered to be a sum of sinusoids. We show that the optimal solution allows the estimation of cochlea dynamics allowing the alignment of all the recorded BAEPs. A better measurement of latencies as well as conductions time are then obtained. Simulation results seem to be very interesting.

关键词： Brainstern Auditory Evoked Potentials estimation modelling optimization simulated annealing

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Component-based design: Towards guided composition 3

Component-based design: Towards guided composition

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3rd International conference on Application of Concurrency to System Design

作者： Moschoyiannis, S Shields, MW Univ Surrey Dept Comp Guildford GU2 7XH Surrey England

ISBN: (纸本)0769518877

In this paper we present a mathematical model for the composition of software components, at a semantic modelling level. We describe a mathematical concept of a single software component and identify properties that ensure its potential behaviour can be captured Based on that, we give a formal definition of composition and examine its effect on the individual components. We argue that properties of the individual components can, under certain conditions, be preserved in the composite. The proposed model can be used for guiding the composition of components as it advocates formal reasoning about the composite before the actual composition takes place.

关键词： Assembly systems Concurrent computing Large-scale systems mathematical model Pathology Software engineering Software systems System recovery Unified modeling language

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Knowledge elicitation and decision-modelling for command agents

Knowledge elicitation and decision-modelling for command age...

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7th International conference on Knowledge-Based Intelligent Information and engineering Systems (KES 2003)

作者： Watson, M Lui, F Univ Queensland ARC Key Ctr Human Factors & Appl Cognit Psychol St Lucia Qld Australia Dept Def DSTO Edinburgh SA Australia

ISBN: (纸本)3540408045

Understanding and designing for the human operator's role in military command and control (C2) environments goes beyond any one discipline;therefore, Cognitive Work Analysis (CWA) attempts to integrate the contributions of psychology, systems engineering, sociology, and other cognitive sciences while conceptually distinguishing their separate contributions. We have tried to address the issues of modelling decision-making in the real world. We have examined how knowledge-based behaviour can be converted into rules to guide agent action in dealing with both constraints of terrain and the enemy on the agent's goals. We have modelled the company commander's military decision-making process for the purposes of producing command agents (CA) for wargames simulations. Our focus in this work is to implement an agent framework which is goal oriented rather than task driven;it is therefore, anticipated that the CA developed from the CWA will be better able to handle novel situations.

关键词： Decision making

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FINITE AMPLITUDE TIDAL SANDBANKS: ONE-DIMENSIONAL EQUILIBRIUM PROFILES 28

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28th International conference on Coastal engineering, ICCE 2002

作者： Roos, Pieter C. Hulscher, Suzanne J. M. H. Van Damme, Ruud M. J. Water Engineering and Management Faculty of Engineering Technology University of Twente P.O. Box 217 AE Enschede7500 Netherlands Faculty of Mathematical Sciences University of Twente P.O. Box 217 AE Enschede7500 Netherlands

ISBN: (纸本)9812382380

We investigate tidal sandbanks with a nonlinear morphodynamic model. The model consists of shallow water flow (including Coriolis and friction effects), bedload and suspended load transport to describe the sea bed evolution. We look into the finite amplitude behaviour of sandbanks with preferred spacing and orientation from linear theory. In case of a suspended load sediment transport formulation, this leads to equilibrium profiles, which express a balance between drag effects and slope effects on sediment transport. For a bedload transport formulation the sea bed develops into an unrealistic pattern with sharp crests that tend to touch the water surface. The stability properties of the suspended load equilibrium differ from those of a flat bed. We discuss the implications of these results for the understanding of sandbanks as well as the modelling of human intervention at the sea bed, such as large-scale offshore sand extraction. © 2003 World Scientific Publishing Co. Pte. Ltd.

关键词： Sediment transport

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