Artelys Knitro 13.1: solving MINLP faster than ever!
Mixed-integer nonlinear problems offer a very natural way to model many engineering problems where nonlinear functions can capture the complex behavior of physical processes and integer variables can be used to model discrete decisions.
Artelys Knitro 13.0 introduced a new parallel branch and bound to solve our customers’ most complex MINLP. Artelys Knitro 13.1 pushes it further by adding several key features:
- New heuristics to quickly find good feasible solutions.
- Possibility for the user to pass an initial integer solution. This solution can even be repaired automatically if infeasible.
- Introduced an automatic restart functionality for higher performances. This allows a MINLP solve to reset the tree search back to the root node after a partial search and restart with an optimized set of solver parameters and cutoff values.
- Significant performance improvements across all discrete and continuous algorithms.
Relying on these new features dedicated to MINLPs, Artelys Knitro 13.1 is 3 times faster on average than version 13.0 on the MINLP benchmarks such as MINLPLib2.
Artelys Knitro 13.1 also introduces a new noise estimation routine for nonlinear objective functions to adapt the derivatives approximation. This is particularly useful when solving black-box optimization problems and relying on an external simulator (network model, finite element methods, chemical reaction, etc.) in which numerical inaccuracies can lead to noisy black-box optimization models.
Additional features of Artelys Knitro 13.1:
- 40% performance improvement on Apple Silicon thanks to the integration of new specialized mathematical subroutines.
- Updated Knitro-MATLAB interface to support the new MATLAB “problem-based” interface.
- New heuristic for solving models with complementarity constraints (MPEC) when using the barrier/interior-point algorithm.
- General performance improvements on nonlinear continuous models in particular when using BFGS or L-BFGS Hessian approximation.
If you want to know more about Artelys Knitro, you can contact us or visit the dedicated web page.
Innovative grid technologies can improve renewable energy integration in the Latvian grid by up to 40%
—The power grid faces challenges in managing the increasing amounts of new wind and solar power generation. Grid Enhancing Technologies (GETs) are essential for optimizing the use of the existing infrastructure. Artelys carried out a study for Latvian Transmission System Operator (TSO) AST to assess the renewable generation hosting capacity of the transmission grid and to evaluate the benefits that GETs can provide to renewable integration. The study performed simulations using the open-source optimal flow tool, PowSyBI Metrix. Results show that Grid Enhancing Technologies can increase Renewable Energy Sources (RES) hosting capacity by up to 40% and were announced in the following press release.
Artelys Knitro 14.1: delivers very quick solutions on non-convex models
— We are pleased to announce that Artelys Knitro 14.0 is now available! This new version enables compagnies to solve complex non-linear optimization problems with unprecedented efficency and precision.
You missed the METIS 3 Dissemination event? The slides are now available!
— Artelys was thrilled to organize the METIS 3 Dissemination webinar on April 17, which was a great opportunity to present key studies and upgrades of METIS models and datasets conducted in the last four years, including exciting discussions with external panelists!
Artelys participates in the demonstration of large-scale underground hydrogen storage in Europe
— Artelys is involved in the five-year project FrHyGe funded by the European Commission via the Clean Hydrogen Partnership.
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