UMR CNRS 6211
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UMR CNRS 6211 |
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Ecole thématique CNRS
Workshops (software and models will be freely distributed to participants)
A.1.S4. Arnaud Banos (Image et
Ville, FR) and Eric Daudé (MTG, FR)
(Monday, Tuesday, Wednesday, Friday: 16h-19h)
(zip material Lalonde-Netlogo-Banos to download)
Modelling and simulating spatial processes in Netlogo: from model creation to their exploration
Creating an agent-based model implies going
through several fundamental steps, including the formulation of the problem, its
formalisation in an agent-based perspective, its implementation in a relevant
simulation platform using a programming language, and its exploration through
simulation, including sensitivity analysis and validation.
This workshop will be dedicated to the whole work chain, with a specific
emphasis on the design and implementation of a spatial simulation model (urban
growth or epidemic diffusion).
• Step 1 : Stating and formalizing a
geographic problem in an agent-based perspective
• Step 2 : Some preliminary examples of Small Artificial Worlds Programming :
the Game of Life, the Prey-Predator model, the Schellings’ segregation model,
etc ;
• Step 3 : Introduction to algorithmic programming in NetLogo
• Step 4 : Design and implementation of a geographic model (urban growth or
epidemic diffusion)
Steps 3-4 will be open to participants attending other workshops during Step 1-2
Links:
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http://web.univ-pau.fr/~banos/banos-gallerie.html
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http://www.univ-rouen.fr/MTG/EricDaude.htm
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http://ccl.northwestern.edu/netlogo/
Basic support:
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http://www.spatial-modelling.info/
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http://www.univ-rouen.fr/MTG/PatriceLanglois2.htm
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http://web.univ-pau.fr/~banos/banos-gallerie.html
A.3.S4 Mike Batty (CASA, UK) and
Alex Hagen (RIKS, NL)
(Monday, Tuesday, Thursday, Friday: 16h-19h)
Calibration, validation and comparison of Agent-Based Spatial Simulation Models
This workshop will be focusing on ABMs (Agent-based models), CA (Cellular automata) and LUT (land use transport) models developed at the Centre for Advanced Spatial Analysis, UCL, and map comparison techniques for the validation of spatial cellular models such as Metronamica developed at the Research Institute for Knowledge Systems, The Netherlands.
1. Calibrating, Validating & Verifying
Agent-Based Spatial Simulation Models
(Monday, Tuesday: 16h-19h)
Workshop Convenor Michael Batty m.batty@ucl.ac.uk
This first part of the workshop will focus
on the sequence of stages used in building an agent-based model which is focused
on the spatial domain. Differences between these stages: calibration – fine
tuning the model parameters; validation – seeing how well the model reproduces
reality; and verification – scrutinizing the model’s logical consistency, will
be examined using examples of models based on fine scale spatial movement from
pedestrian modelling to residential segregation.
In particular the following topics will be addressed:
• Model specification and data requirements
• Differences between parameter space and plausible model space
• Methods of parameter estimation or calibration
• Methods of spatial validation of spatial activity data
• Methods for exploring model consistency
• Sensitivity analysis
In two afternoon sessions, the methodologies will be introduced and the participants gain hands on experience using the Netlogo/Starlogo software platform. We will expect participants to download this software to their own laptops and it will also be provided on public machines available at the workshop
2. How Well Do You Know Your Model? A
Methodology for Map Comparison-Based Model Validation
(Thursday, Friday: 16h-19h)
Workshop Convenor Alex Hagen-Zanker
ahagen@riks.nl
Validation of spatial models with use of the Map Comparison
Kit. The materials of the workshop that took place in two afternoon sessions:
First day:
PowerPoint, Day 1
Exercises, Day 1
Second day:
PowerPoint, Day 2
Exercises, Day 2
Additional data
The software itself is found on the
Map
Comparison Kit website
As multi-agent models outgrow the theoretical realm and find practical applications it becomes essential to understand the fit between reality and model. This second part of the workshop introduces a methodology of spatial analysis to understand the nature, extent and spatial distribution of differences between maps.
In particular the following topics will be
addressed:
• Distinguishing between minor and major errors
• Balancing structural similarity and location-to-location overlap
• Multi-criteria and multi-scale analysis
• Significance and meaningful interpretation
• Traps and common mistakes
In two afternoon sessions the methodologies will be introduced and the participants gain hands on experience using the free Map Comparison Kit software. Participants are encouraged to bring own data (contact ahagen@riks.nl for details), but case material and exercises are available too.
Links:
• http://www.casa.ucl.ac.uk/
• http://www.riks.nl/
• http://gisagents.blogspot.com/
Proposed Reading:
A.4.ESHIA Denis Phan, Jean Pierre Müller, Frederic Amblard, Wander Jager, Juliette Rouchier, Simone Alfarano, Eric Darmon : Multi-agent models based on analytical models or diagrammatic representations
This workshop will be devoted to the development of multi-agent models based on complex variations of basic analytically solvable problems. It will include:
Monday, September 17
16h - 17h30 Denis Phan - discrete choice with externality, network effects (Phan, Amblard 2007, Ch10) (download_pdf)
18h - 19h30 Jean
Pierre Müller - UML workshop (Phan, Amblard 2007, Ch12)
(download from Lecture:
pdf1-StaticModel
pdf2-DynamicModel)
Tuesday, September 18
16h - 17h30 Frederic Amblard & Wander Jager - Simplifying psychology in ABM
18h - 19h30 Frederic Amblard - introduction to models of opinion dynamics (to be confirmed)
Wednesday, September 19
16h - 17h30 Juliette Rouchier
18h - 19h30 Simone Alfarano Parameter Estimation in Agent-Based Models (to be confirmed)
Thursday, September 20: Free afternoon - COSMAGEMS workshop
Friday, September 21
16h - 17h30 Eric Darmon - Adaptive Sellers on search markets (to be confirmed) (pdf material to download)
18h - 19h30 Denis Phan - “Emergence” (Phan, Amblard 2007, Ch14) (pdf material to download)
A.5.ESHIA. Enrico Scalas and Michael Koenig (zipped material to download)
Markov Chains in Economics (pdf material to download)
This workshop will be devoted to the
application of Markov Chains in Economic modelling, stressing the analogy with
various models used in Physics.
(From Monday to Friday 16:00 - 17:30).
A.6.ESHIA. Michael Koenig
and Enrico Scalas
Networks in Economics This workshop will be devoted to the application of
Networks in Economic modelling, stressing the analogy with various models used
in Physics.
(From Monday to Friday 17:30 - 19:00).
ERG-S4 web site for the comparison of models: http://www.spatial-modelling.info
Agent-based computational Economics
Journal of Economic Interaction and Coordination
Journal of Artificial Society and Social Simulations
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Phan D., Amblard F. Eds. (2007) ISBN-13: 978-1-905622-01-6 http://www.bardwell-press.co.uk/publications/agent-based_modelling.htm
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