discrete DCT离散DCT变换discreteadj.不连续的；分离的Discrete mutation operator离散变异算子discrete topological space离散拓扑空间discrete-valued function离散值函数discrete global grid model离散全球格网模型discrete system simulation离散系统仿真discrete commutative group离散交换群discrete derivative filter离散微分算子discrete-iterative-map离散迭代映射discrete scale measurement离散标度测量Discrete multi-templates离散多模板