discrete DCT离散DCT变换discreteadj.不连续的；分离的discrete probability needs离散型概率需求discrete simulation system离散模拟系统discrete random walk model随机轨道模型discrete time risk process离散时间风险模型discrete Lagrangian method离散拉格朗日方法discrete Hartley transformdiscrete memoryless source离散无记忆信源discrete orthogonal moment离散正交矩discrete orthogonal method离散正交法discrete Hamihonian system