“…A typical example are the methods based on the framework of generalized polynomial chaos expansion (PCE) [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], which expand the stochastic quantities of interest in terms of orthogonal basis functions of the uncertain parameters. The number of basis functions grows exponentially with the input dimensionality and/or the expansion order, thus becoming intractable for problems with several parameters that require high-order expansions.…”