Systematic Comparison of Designs and Emulators for Computer Experiments Using a Library of Test Functions
As computational resources have become faster and more economical, scientific re- search has transitioned from using only physical experiments to using simulation- based exploration. A body of literature has since grown aimed at the design and analysis of so-called computer experiments. While this literature is large and active, little work has been focused on comparing methods. This project presents ways of comparing and evaluating both design and emulation methods for computer experiments. Using a suite of test functions – in this work we introduce the Virtual Library of Computer Experiments – a procedure is established which can provide guidance as to how to proceed in simulation problems. An illustrative comparison is performed for each context; putting three emulators, then four experimental designs up against each other; while also highlighting possible considerations for test function choice.
Keywords: Gaussian process; Computer experiments; Emulation; Design of experiments