“…Methods such as simulated annealing, gradient-based schemes and Gaussian random fields are usually applicable for isotropic and twophase media (Torquato, 2002;Jiao et al, 2007;Jiao et al, 2008;Fullwood et al, 2008a;Lanzini et al, 2009;Jiang et al, 2013;Ballani & Stoyan, 2015). Methods such as simulated annealing, gradient-based schemes and Gaussian random fields are usually applicable for isotropic and twophase media (Torquato, 2002;Jiao et al, 2007;Jiao et al, 2008;Fullwood et al, 2008a;Lanzini et al, 2009;Jiang et al, 2013;Ballani & Stoyan, 2015).…”