README.md

Electric Vehicle Fleets: Scalable Route and Recharge Scheduling through Column Generation

This repository provides the code necessary to reproduce the numerical experiments of the paper

Parmentier, Axel, Martinelli, Rafael, and Vidal, Thibaut, Electric Vehicle Fleets: Scalable Route and Recharge Scheduling through Column Generation.

If you use the latticeRCSP package for resource constrainted shortest path problems included, please cite the paper below.

Parmentier, Axel, Algorithms for non-linear and stochastic resource constrained shortest path

Installation

The code is written in C++17. It has been compiled on Windows and Linux. The instructions below are for Linux.

Dependencies

The code depends on the following libraries: CPLEX, Boost. An academic version of the CPLEX library can be obtained here.

Boost can be installed using the package manager of your distribution. For example, on Ubuntu:

sudo apt install libboost-all-dev

Compilation

The code can be compiled using Make. Before compiling, you need to set the environment variables to find CPLEX. To that purpose, update the file cplex_conf.sh with the path to your CPLEX installation. Then, run the following commands:

source cplex_conf.sh

The code can then be compiled using:

make

The resulting executable is relsease/evsp. A debug version can be compiled using:

make debug

Usage

Execute the program using:

./release/evsp

This will give you a list of options and parameters. Options -evsp, -cg-rf, and cg-pr mo should always be specified. Here are a few examples. In order to run a non-sparsfied column generation on instance instances/ropke/D2_S4_C100_01.txt, run:

./release/evsp instances/ropke/D2_S4_C100_01.txt -evsp -cg -cg-rf -cg-pr mo

In order to run a sparsified column generation, run:

./release/evsp instances/ropke/D2_S4_C100_01.txt -evsp -cg -cg-rf -cg-pr mo -spar

In order to run a branch-and-price on the sparsified instance, run

./release/evsp instances/ropke/D2_S4_C100_01.txt -evsp -bp -cg-rf -cg-pr mo -spar

In order to run the diving heuristic on the sparsified instance, run

./release/evsp instances/ropke/D2_S4_C100_01.txt -evsp -bp -cg-rf -cg-pr mo -spar -bb-d

Reproducing the numerical experiments

The numerical experiments of the paper can be reproduced using the following scripts.

./scripts/cg.sh     # To calibrate the column generation
./scripts/bp.sh     # Branch and price experiments
./scripts/dive.sh   # Diving heuristic experiments

Remark that you may have to install sem using sudo apt install parallel to rune these scripts.