Thus, a relaxation of the constraint of an integer problem does not necessarily improve the solution, because the feasible region is discrete and not continuous.
因此，整型问题的约束放松并不一定会改进解决方案，因为可行域是离散的，而不是连续的。
2
Distribution network reconfiguration is a multi - objective , multi - constraint, discrete nonlinear combinatory optimization problem.
配电网重构是一个多目标、 多约束、 离散的非线性组合优化问题。
3
In this paper, the robust positive invariance of given linear state constraint sets of uncertain discrete time systems is studied by means of the mixed monotone decomposition method.