Optimizing Production Schedule of Coalbed Methane Wells Using a Stochastic Evolution Algorithm

Figure 2

An illustration of CMA-ES optimization on a two-dimensional linear function . The dashed lines are the contour lines of the function. The optimal solution is in the upper right corner. The orange and gray dots denote the population distribution for the current and the last iteration, respectively. The black cross (“+”) and the black ellipsoid denote the symmetry center and the isodensity line of the distribution for the current iteration, while the gray cross and the gray ellipsoid are for the last iteration. (a) Iteration 1. (b) Iteration 3. (c) Iteration 5.

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