DIRECT是一种采样策略，主要运用于高维、黑箱等问题。此中采样策略可以很好的兼顾全局最优和局部最优，是一种比较好的采样方法。-DIRECT is a sampling strategy, mainly used in high-dimensional, black-box problem. Including sampling strategy can be a good balance between the global optimum and local optimum is a better sampling methods.