References¶

numgeo-ACT has been developed and applied in a series of publications by our group. The list below collects the works in which the automatic-calibration methodology and tool have been presented or used. If numgeo-ACT contributes to your research, please cite the foundational paper (the first entry).

Foundational paper¶

The DEEM optimizer¶

• Machaček, J., Siegel, S. & Zachert, H. (2025). DEEM — Differential Evolution with Elitism and Multi-populations. Swarm and Evolutionary Computation, 92, 101818. doi:10.1016/j.swevo.2024.101818 — the global optimization algorithm at the core of numgeo-ACT (see Optimization). Documentation: j-machacek.github.io/DEEM · GitHub.

Applications and methodology¶

1. Machaček, J., Staubach, P., Grandas Tavera, C. E., Wichtmann, T. & Zachert, H. (2022). On the automatic parameter calibration of a hypoplastic soil model. Acta Geotechnica, 17(11), 5253–5273. doi:10.1007/s11440-022-01669-4

2. Machaček, J., Siegel, S., Staubach, P. & Zachert, H. (2023). Automatic Parameter Calibration of Two Advanced Constitutive Models. In: Challenges and Innovations in Geomechanics, Lecture Notes in Civil Engineering, Vol. 288, Springer.

3. Brosz, F., Machaček, J. et al. (2023). Automatic Parameter Calibration of Two Sophisticated Soil Models Based on Monotonic and Cyclic Tests. In: Proc. 10^th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE 2023), ISSMGE.

4. Brosz, F., Machaček, J. & Zachert, H. (2024). Automatic parameter calibration of advanced constitutive soil models and application to a boundary value problem. (TU Darmstadt.)

5. Zeng, S., Machaček, J. & Taiebat, M. (2024). Automatic Calibration Tool for Efficient Parameter Optimization of SANISAND Models under Cyclic Loading. (ASCE; University of British Columbia & TU Darmstadt.)

6. Machaček, J., Zeng, S. & Taiebat, M. (2025). Enhancing accuracy and efficiency in cyclic liquefaction modeling: An automatic calibration framework for advanced constitutive models. Computers and Geotechnics, 183, 107208.

7. Machaček, J., Siegel, S. & Zachert, H. (2025). DEEM — Differential Evolution with Elitism and Multi-populations. Swarm and Evolutionary Computation, 92, 101818. doi:10.1016/j.swevo.2024.101818

8. Zeng, S., Machaček, J., Moshfeghi, S. & Taiebat, M. (2026). Data strategies for automatic calibration of soil constitutive models. Computers and Geotechnics (Elsevier).

9. Bombe, J., Schmüdderich, C., Machaček, J., Tafili, M. & Wichtmann, T. (2025). Vereinfachtes Kalibrierungsverfahren für das hypoplastische Stoffmodell anhand von Kennwerten der Korngrößenverteilungskurve. (German conference contribution; Ruhr-Universität Bochum & TU Darmstadt.)

10. Bombe, J., Schmüdderich, C., Tafili, M., Wichtmann, T. & Machaček, J. (2026). Simplified Calibration of Hypoplastic Model Parameters Based on Grain Size Distribution Characteristics. Lecture Notes in Civil Engineering, Springer.

Software & service¶

• numgeo — the finite-element solver used by numgeo-ACT: numgeo.de · documentation
• DEEM — the global optimizer used by numgeo-ACT: documentation · GitHub
• Automatic calibration — project page and free calibration service: numgeo.de/automatic-calibration