B-differential DC function DC optimization DCA Gauss-Newton method Information technology industries abs-linearization achievement scalarizing functions asynchronous computing biased-randomized algorithms global convergence heuristics interactive method level decomposition multiobjective optimization multiple instance learning non-smooth optimization nonlinear complementarity problem nonsmooth equations nonsmooth optimization parallel computing soft constraints spent nuclear fuel disposal stochastic hydrothermal UC problem stochastic programming superlinear convergence support vector machine