This function is a simple four-dimensional test function. For the purpose of tuning, Cox et al. (2001) add a small noise term to the response to simulate the collection of experimental data. Cox, D. D ...

text{Input} \rightarrow \text{FUNCTION} \rightarrow \text{Output}\) If we think of a simple function such as multiply by 3, we can determine a set of output values. Instead of writing Function ...