discrete map离散映射discreteadj.不连续的；分离的discrete Gauss curvature离散Gauss曲率Discrete singular kernel离散奇异核discrete boundary points离散边界点discrete Radon transform离散Radon变换discrete bilincar system离散双线性系统discrete -time systems离散系统discrete sample analyser分散采样分析器discrete choice modeling离散选择模型DiscreteCosine transform离散余弦变换discrete component parts离散组件