HEC-HMS Tutorials and Guides Working with Optimization Trials Current: Applying Simplex and Differential Evolution Optimization to Single Event Calibration PDF Download PDF Download page Applying Simplex and Differential Evolution Optimization to Single Event Calibration. Current page Include child pages All pages Applying Simplex and Differential Evolution Optimization to Single Event Calibration Applying the Simplex Optimization Search Method for Single Event Calibration Applying the Differential Evolution Optimization Search Method for Single Event Calibration In this group of workshops, you will step through two tutorials for Simplex (deterministic) and Differential Evolution (stochastic) optimization search methods for single event calibration. ×