Ensemble approach

Combining interpolation method 1, 2, …, j, …, M:

\[\hat{Z}(s_0) = \sum_{j = 1}^{M}(\hat{Z}_j(s_0) \cdot w_j)\] With \(w_j\) the weight for each method; \(\sum_{j = 1}^{M}w_j = 1\)