%0 Computer Program
%A van Schilt, Isabelle
%D 2024
%T Code: Structural Calibration for Supply Chain Simulation Models with Sparse Data
%U 
%R 10.4121/2a2a2677-4f73-4bd9-ac0d-e28099c3cc26.v1
%K structure
%K uncertainty
%K simulation
%K sparse data
%K supply chain
%X <p>This repository is used to calibrate the underlying structure of a stylized supply chain simulation model of counterfeit Personal Protective Equipment (PPE). For this, we use four calibration techniques: Approximate Bayesian Computing using&nbsp;<code style="background-color: var(--bgColor-neutral-muted, var(--color-neutral-muted));">pydream</code>, Bayesian Optimization using&nbsp;<code style="background-color: var(--bgColor-neutral-muted, var(--color-neutral-muted));">bayesian-optimization</code>, Genetic Algorithms using&nbsp;<code style="background-color: var(--bgColor-neutral-muted, var(--color-neutral-muted));">Platypus</code>, and Powell's Method using&nbsp;<code style="background-color: var(--bgColor-neutral-muted, var(--color-neutral-muted));">SciPy</code>. The calibration is done with sparse data, which is generated by degrading the ground truth data on noise, bias, and missing values. We define the structure of a supply chain simulation model as a key value of a dictionary (sorted on betweenness centrality), which is a set of possible supply chain models. The integer is, thus, the decision variable of the calibration.</p><p><br></p><p>To use this repository, we need a simulation model developed in&nbsp;<a href="https://github.com/averbraeck/pydsol-core" target="_blank" style="background-color: transparent; color: var(--fgColor-accent, var(--color-accent-fg));">pydsol-core</a>&nbsp;and&nbsp;<a href="https://github.com/imvs95/pydsol-model" target="_blank" style="background-color: transparent; color: var(--fgColor-accent, var(--color-accent-fg));">pydsol-model</a>&nbsp;. Additionally, we need a dictionary with various different simulation structures as input, as well as the ground truth data. For this project, we use the repository&nbsp;<a href="https://github.com/imvs95/complex_stylized_supply_chain_model_generator" target="_blank" style="background-color: transparent; color: var(--fgColor-accent, var(--color-accent-fg));">complex_stylized_supply_chain_model_generator</a>&nbsp;as simulation model.</p><p><br></p><p>This repository is an extension of the&nbsp;<code style="background-color: var(--bgColor-neutral-muted, var(--color-neutral-muted));">celibration</code>&nbsp;library, making it easy to plugin different calibration models, distance metrics and functions, and data.</p><p><br></p><p>This repository is also part of the Ph.D. thesis of&nbsp;<a href="https://www.tudelft.nl/staff/i.m.vanschilt/?cHash=74e749835b2a89c6c76b804683ffbbcf" target="_blank" style="background-color: transparent; color: var(--fgColor-accent, var(--color-accent-fg));">Isabelle M. van Schilt</a>, Delft University of Technology.</p>
%I 4TU.ResearchData