AMPL Model Colaboratory¶
AMPL Model Colaboratory is a collection of AMPL models in Jupyter Notebooks that run on platforms such as Google Colab, Kaggle, Gradient, and AWS SageMaker. [See our Highlights]
You can use the Christmas notebook written by ChatGPT to get started:
BTW: you can even ask ChatGPT to write models for you! If it makes mistakes you can ask for help in our new Discourse Forum!
Contents¶
Notebooks¶
AMPL Christmas Model created by ChatGPT¶
Description: Christmas model generated by ChatGPT
AMPL Model Colaboratory Template¶
Description: Basic notebook template for the AMPL Colab repository
Book Example: Economic equilibria¶
Description: economic model using complementarity conditions from Chapter 19 AMPL book
Book Example: Transshipment problem¶
Description: book example with general transshipment model (net1.mod)
Book Example: diet¶
Description: book example autogenerated using diet.mod, diet.dat, and diet.run
Book Example: prod¶
Book Example: steel¶
Book Example: transp¶
CP-style scheduling model with the numberof operator, solved by a MIP solver¶
Description: Scheduling model with the Constraint Programming numberof operator, solved with a MIP solver. New MIP solver drivers based on the [MP library](https://amplmp.readthedocs.io/) enable CP-style modeling.
Tags: ampl-only, constraint-programming
Author: Gleb Belov (3 notebooks) <gleb@ampl.com>
Capacity expansion of power generation¶
Description: Models the extensive form of a deterministic multi-stage capacity expansion problem. In this model we can have multiple resources of the same type which have identical properties. The model can be further developed into a stochastic one.
Diet lecture¶
Description: Diet case study
Tags: ampl-only, ampl-lecture
Diet model with Google Sheets¶
Description: Diet model using Google Sheets
Dual-Donor Organ Exchange problem¶
Description: Most transplants from living donors require only one donor for each procedure. There are, however, exceptions, including dual-graft liver transplantation, bilateral living-donor lobar lung transplantation, and simultaneous liver-kidney transplantation. For each of these procedures, grafts from two compatible living donors are transplanted. As such, these procedures are more involved from an organizational perspective than those with only one donor. Unfortunately, one or both of the donors can often be biologically incompatible with the intended recipient, precluding the transplantation.
Author: Mikhail (1 notebook) <mail@solverytic.com>
Dynamic routing example¶
Description: Example of interactive optimization with GUI using AMPL and Google Maps
Efficient Frontier with Google Sheets¶
Description: Efficient Frontier example using Google Sheets
Financial Portfolio Optimization with amplpy¶
Description: Financial Portfolio Optimization with amplpy and amplpyfinance
Google Hashcode 2022¶
Description: Google Hashcode 2022 Practice Problem
Hospitals-Residents MIP¶
Description: hospitals-residents problem with ties problem solved with ampl and highs
Jupyter Notebook Integration¶
Description: Jupyter Notebook Integration with amplpy
Largest small polygon¶
Description: Notebook related to the Largest Small Polygon Problem
Multicommodity transportation problem¶
Description: Multicommodity transportation model with binary variables
N-Queens¶
Description: How can N queens be placed on an NxN chessboard so that no two of them attack each other?
Author: Gleb Belov (3 notebooks) <gleb@ampl.com>
Network design with redundancy¶
Description: Design of an electricity transportation network provides enough redundancy, so that a break of one component does not prevent any user from receiving electricity. The approach also works for similar distribution networks and can potentially be used in the design of military logistic networks.
Tags: electric-grid, military
Nonlinear transportation model¶
Description: book example autogenerated using nltransd.mod, nltrans.dat, and nltrans.run
Nonlinear transportation problem example¶
Description: book example autogenerated using nltransd.mod, nltrans.dat, and nltrans.run
Optimization Methods in Finance: Chapter 3¶
Description: Optimization Methods in Finance: Bond Dedication Problem.
Pattern Enumeration¶
Description: Pattern enumeration example with amplpy
Pattern Generation¶
Description: Pattern generation example with amplpy
Plot feasible region¶
Description: Plot the feasible region and optimal solution for a simple two variable model using AMPL’s Python API.
Pricing and target-market¶
Description: Formulate a pricing optimization and target-market problem as a MILP.
Production model¶
Description: generic model for production problem
Quick Start using Pandas dataframes¶
Description: Quick Start using Pandas dataframes to load and retrieve data
Quick Start using lists and dictionaries¶
Description: Quick Start using lists and dictionaries to load and retrieve data
Robust Linear Programming with Ellipsoidal Uncertainty¶
Description: AMPL Modeling Tips #6: Robust Linear Programming
Author: Gleb Belov (3 notebooks) <gleb@ampl.com>
Roll Cutting - Revision 1 & 2¶
Description: Pattern tradeoff example with amplpy
Simple sudoku solver using logical constraints (with GUI)¶
Description: Simple sudoku model with two formulations: as a Constraint Programming problem using the alldiff operator and as a MIP. Note that the CP formulation is more natural but it needs a solver supporting logical constraints or a MIP solver with automatic reformulation support (see [here](https://amplmp.readthedocs.io/) for more information).
Solving a nonogram puzzle¶
Description: Model for solving nonogram puzzles autogenerated using nonogram.mod, nonogram.dat and nonogram.run.
Solving simple stochastic optimization problems with AMPL¶
Description: Examples of the Sample Average Approximation method and risk measures in AMPL
Author: Nicolau Santos (1 notebook) <nfbvs@ampl.com>
Steel industry problem¶
Description: model for steel production problem
Sudoku Generator¶
Description: Generate Sudoku boards with unique solution via iterative method and mip formulation.
Transportation problem¶
Description: an AMPL model for the transportation problem
Tags: ampl-only, ampl-lecture
Travelling Salesman Problem with subtour elimination¶
Description: this example shows how to solve a TSP by eliminating subtours using amplpy and ampls
Unit Commitment for Electrical Power Generation¶
Description: This notebook is based on the following [notebook](https://colab.research.google.com/github/Gurobi/modeling-examples/blob/master/electrical_power_generation_1_2/electrical_power_1_gcl.ipynb) and illustrates the power generation problem using AMPL. The original version featured the Gurobi solver. By default, this notebook uses the HiGHS and CBC solvers.
VPSolver: Cutting & Packing Problems¶
Description: Solving cutting & packing problems using arc-flow formulations
amplpy setup & Quick Start¶
Description: amplpy setup and quick start