ECMS2006 20th European Conference on Modelling and Simulation

20TH EUROPEAN Conference
on Modelling and Simulation
ECMS 2006 (formerly referred to as 'SCS-ESM')

May 28th - 31st, 2006
Bonn, Germany

KEYNOTE and PLENARY SPEAKERS, TUTORIALS and WORKSHOPS

Keynote speakers

Prof. Lotfi A. Zadeh

Computer Science Division
University of California
Berkeley, CA 94720-1776
zadeh@cs.berkeley.edu
BISC Program
http://www-bisc.cs.berkeley.edu/

A New Frontier in Computation—Computation with Information Described in Natural Language

Much of human knowledge is described in natural language. For this reason, computation with information described in natural language is certain to grow in visibility and importance as we move further into the age of machine intelligence and mechanized decision-making.
The problem of computation with information described in natural language cannot be dealt with through the use of existing natural language processing techniques. What is needed for this purpose is a new conceptual structure whose centerpiece is the concept of a generalized constraint. This structure is described and its applications are illustrated by examples.

Extended Abstract and CV

Prof. François Cellier

President of SCS
(The Society for Modeling and Simulation International)
Institute of Computational Science
ETH-Zentrum, CAB G82.1
CH-8092 Zürich
fcellier@inf.ethz.ch

Wrapping Multi-bond Graphs: A Structured Approach to Modeling Complex
Multi-body Dynamics

Bond graphs have established themselves as a reliable tool for modeling physical systems. Yet, they are highly abstract
due to their domain independence. Wrapping techniques allow the modeler to preserve the best
from two worlds: the flexibility and reliability of bond graphs on the one hand, and the intuitive appeal and familiarity
offered by a domain-specific modeling methodology on the other.
The talk introduces a new multi-bond graph library for Dymola that includes a partial re-implementation of
Dymola’s standard multi-body systems library using multi-bond graphs.
co-authored by
Dirk Zimmer, ETH-Zürich

Prof. Ulrich Trottenberg

Head of the Fraunhofer Research Institute for Scientific
Computing and Algorithms
Chair for Numerical Mathematics and Scientific Computing
at the University of Cologne, Germany
Fraunhofer Institute (SCAI)
Schloss Birlinghoven
53754 Sankt Augustin
Ulrich.Trottenberg@scai.fraunhofer.de

Multigrid in Industry

Multigrid algorithms are the most efficient solutions for a huge class of large-scale applications
(partial differential equations) in Numerical Simulation.

The talk deals with Multigrid-based software development and its use for industrial applications.
It turns out that the Algebraic Multigrid approach (AMG) is the right answer for most of the industrial requirements.

Special Talk for the Bond Graph track by

Prof. Sergio Junco

Universidad Nacional de Rosario, Argentina

Bond Graphs: An Engineering Tool for Integrated Modelling, Analysis, Diagnostic and Control System Synthesis

Bond graphs convey information on energy processing, power flow continuity, structure of component interconnection, and
computational causality on physical systems. Thus, they can support graphical methodologies that exploit these features in
order to analyze dynamic properties and to synthesize and design controllers for physical systems.

Among other issues, this talk will address the derivation from bond graphs of the so-called port-controlled Hamiltonian models
with dissipation, introduced in the domain of nonlinear control theory; the assessment of properties like stability of equilibria,
input-output passivity, and differential flatness; the obtention and application of input-output inverse models; as well as the
synthesis of control laws (regulation, stabilizing, tracking controllers) for (possibly) nonlinear systems.
Extended abstract

Tutorials

Prof. Wolfgang Borutzky

Department of Computer Science
University of Applied Sciences
53757 Sankt Augustin, Germany
wolfgang.borutzky@fh-bonn-rhein-sieg.de

AND

ir. Johan Hemssems

Controllab Products B.V.
Enschede, The Netherlands
johan.hemssems@controllab.nl

Bond Graph Modelling and Simulation of Mechatronic Systems

This tutorial introduces into a graphical, computer aided modelling methodology that is particularly suited for the concurrent design
of controlled mechatronic systems, i. e., for engineering systems with mechanical, electrical, hydraulic or pneumatic components
including interactions of physical effects from various energy domains.
The methodology clearly and intuitively starts from the observation of energy flows between the components of a system.
Physical effects and their interactions are considered and are taken into account in a qualitative manner. In general,
the methodology enables to develop a graphical model that is consistent with the first principle of energy conservation without having the need
to establish and to reformulate any equations. The derivation of a mathematical model from the graphical description that is suitable for the purpose of a study
can be rather left to appropriate software tools performing this task automatically.
As a consequence, users of the methodology can focus on physical modelling of a system.
The application of the bond graph modelling methodology is illustrated by a number of small example systems from various disciplines.
As an example of a software supporting bond graph modelling, the 20simTM multi-formalism modelling and simulation environment is used.
Beyond the introduction, the tutorial addresses some advanced topics in order to demonstrate the potential of this
powerful modelling approach to mechatronic systems. To this end, it is shown how models of multibody systems including flexible bodies
can be build in a systematic manner. Moreover, a brief outlook of further advanced state-of-the-art applications of bond graphs is given.
The tutorial welcomes all interested individuals, professionals, students and faculty members who may want to
come to know a methodology that meets today's requirements of multidisciplinary modelling
and that complements traditional methodologies based on block diagrams or networks.

Emiliano Casalicchio

Universita' di Roma Tor Vergata
and
Federico Morabito

Telecom Italia Learning Services

Through the Evolution of Publish/Subscribe Systems

The publish/subscribe communication paradigm is suitable for the efficient exchange of information in a variety of large-scale dynamic applications: news delivery, stock quoting, air and metropolitan traffic control, on-line games, dissemination of multimedia contents, dissemination of auction bids, services and resources discovery, remote control of critical infrastructures and management of large scale systems.

In the last decade publish/subscribe systems have evolved both in terms of scalability and in terms of flexibility of representation and ease of customization. Primitive implementations are centralized whereas the newest solutions are distributed and highly scalable. As far as the flexibility of representation and ease of customization, the newest content-based solutions introduce more flexibility in the subscriber preferences specification process, compared to the older channel- based solution.

The tutorial will start with a complete overview of publish subscribe systems and their evolution, from their origin until present.
Real scenarios will be used to show the applicability of such a communication paradigm, from informative services to distributed application and control systems.

The second part of the tutorial will focus on the main research topics about publish/suscribe systems: design of novel solutions, modelling and simulation.

Audience background:
The audience should be familiar with the internet architecture and
infrastructure (basic background), and with the principles of discrete event modelling and simulation.