SystemsAnalysis LaboratoryHelsinki University of Technology

SystemsAnalysis LaboratoryHelsinki University of Technology 1

Research Topics

Group:Professor Harri Ehtamo

Graduate School SeminarUniversity of Jyväskylä

SystemsAnalysis LaboratoryHelsinki University of Technology

SystemsAnalysis LaboratoryHelsinki University of Technology 2

Optimization in Nonlinear Pricing

Walras Tatonnement Interpretation(Mitri Kitti, PhD thesis)

-Algorithm convergence analysis of principal-agent models

Numerical Algorithms and Graph Interpretation(Kimmo Berg)

-Discrete/Continuous gradient type adjustment schemes under local information-Graph interpretation of Lagrange multipliers helps computation

SystemsAnalysis LaboratoryHelsinki University of Technology

SystemsAnalysis LaboratoryHelsinki University of Technology 3

Vehicle Routing Optimization

Stochastic Elevator Group Optimization (EGO)(Opt. formulation: J. Sorsa, H. Ehtamo; based on Siikonen, Tyni, Ylinen heuristic model)

First MILP Formulation and Solution of EGO(Mirko Ruokokoski, Janne Sorsa)

-New solution technique with Branch-and-Cut makes use of valid inequalities, permutation groups, symmetry breaking

GA with Symmetry Breaking + Other new Heuristic Algorithms for VRO(Mirko Ruokokoski, Janne Sorsa, Harri Ehtamo)

SystemsAnalysis LaboratoryHelsinki University of Technology

SystemsAnalysis LaboratoryHelsinki University of Technology 4

Game Theory in Computational Evacuation Modelling

(Prof. Harri Ehtamo, Simo Heliövaara, TKK; PhD Simo Hostikka, PhD Timo Korhonen VTT)

-Development of FDS + Evac fire dynamics simulator-Computational models for evacuation behaviour in large burning buildings-Game theoretical learning algorithms for agents’ decision making