![]() (2013) use the following function for the lower fidelity code:Īn, J., & Owen, A. (2012) add 12 inert input variables.įor the purpose of multi-fidelity simulation, Xiong et al. The remaining four variables are used as quantitative factors.įor the purpose of input variable screening, Moon (2010) and Moon et al. ![]() (2011) use the qualitative factors z 1 = r, z 2 = H u–H l and z 3 = K w, each at three levels. In the context of emulating computer models with both quantitative and qualitative factors, Zhou et al. The range of K w may be changed to, creating a more nonlinear and non-additive function, as in Morris et al. Lognormal(μ, σ) is the Lognormal distribution of a variable, such that the natural logarithm of the variable has a N(μ, σ) distribution. Hydraulic conductivity of borehole (m/yr)įor the purposes of uncertainty quantification, the distributions of the input random variables are:Ībove, N(μ, σ) is the Normal distribution with mean μ and variance σ 2. The input variables and their usual input ranges are: The response is water flow rate, in m 3/yr. Its simplicity and quick evaluation makes it a commonly used function for testing a wide variety of methods in computer experiments. ![]() The Borehole function models water flow through a borehole. ![]()
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