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Optimization with Piecewise Affine Cost Functions

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Passenger Centric Train Timetabling Problem

Michel Bierlaire, Shadi Sharif Azadeh, Mohammad Yousef Maknoon, Tomas Robenek

The aim of this paper is to analyze and to improve the current planning process of the passenger railway service in light of the recent railway market changes. In order to do so, we introduce the Passenger Centric Train Timetabling Problem. The originality ...

Pergamon-Elsevier Science Ltd2016

Towards optimal design of solar assisted industrial processes: Case study of a dairy

François Maréchal, Anna Sophia Wallerand, Régis Voillat

Pinch analysis is a valuable tool for industrial process integration and optimization. Based on heat cascading and Mixed Integer Linear Programming (MILP) the optimal utility system can be found, includ- ing traditional heat sources (burners, boilers) and ...

University of Ljubljana2016

Multi-objective optimization of SNG production from microalgae through hydrothermal gasification

François Maréchal, Adriano Viana Ensinas, Alberto Mian

The conversion of microalgae biomass into biofuels is a quite well explored field of research. Due to high photosynthetic efficiency, microalgae are considered as a potential feedstock for next-generations biofuel conversion processes. This paper addresses ...

2015

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2015

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Biorefineries are multi-product facilities that convert biomass into a broad variety of products (energy, biofuels, chemicals, feed, and food). In this paper, a new systematic approach to select and rank different biorefinery conversion pathways is propose ...

2015

This paper describes an employee scheduling system for retail outlets; it is a constraint-based system that exploits forecasts and stochastic techniques to generate schedules meeting the demand for sales personnel. Uncertain scenarios due to fluctuating de ...

Elsevier2015

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An optimization method based on Mixed Integer Linear Programming (MILP) has been developed for simultaneous optimization of water and energy (SOWE) in industrial processes. The superstructure integrates process thermal streams and optimizes the consumption ...

Elsevier2014

Robust optimization for strategic energy planning

Michel Bierlaire, François Maréchal, Stefano Moret

Long-term planning for energy systems is often based on deterministic economic optimization and unreliable forecasts of fuel prices. Usual consequence is a low penetration of renewables and more efficient technologies in favor of fossil alternatives. A cla ...

2014

A Mixed Integer Linear Programming Approach to the Optimal Reconfiguration of Electrical Distribution Networks with Embedded Generators

Mario Paolone, Carlo Alberto Nucci

The paper focuses on the solution of the minimum loss reconfiguration problem of distribution networks, including embedded generation, by means of a mixed integer linear programming (MILP) model. The proposed model takes into account typical operating cons ...

2011

A cutting-plane method for Mixed-Logical Semidefinite Programs with an application to multi-vehicle robust path planning

Daniel Kuhn

The usual approach to dealing with Mixed Logical Semidefinite Programs (MLSDPs) is through the “Big-M” or the convex hull reformulation. The Big-M approach is appealing for its ease of modeling, but it leads to weak convex relaxations when used in a Branch ...

IEEE2010