discrete map离散映射discreteadj.不连续的；分离的discrete linear control离散线性控制discrete Gabor tranform离散Gabor变换discrete system channel离散式信道discrete neural network离散神经网络discrete - time queue离散时间排队discrete epidemic model离散传染病模型discrete-time control离散时间控制discrete element theory散体介质理论discrete transform pair离散变换对discrete valuation ring离散赋值环