discrete jet离散射流discreteadj.不连续的；分离的discrete hyper -wavelet transforms离散超小波变换discrete particle swarm optimization离散粒子群算法Discrete short time Fourier transform离散短时傅里叶变换discrete address communication system离散地址通信系统Discrete element numerical simulation离散元数值模拟discrete dirivative Green's functionsdiscrete-time-delay fuzzy systems离散时滞模糊系统discrete stationary wavelet transform二进小波变换discrete fractional Fourier transform离散分数傅里叶变换discrete quadrature direction wavelet离散方向小波

1. The foreword gives a brief account for the need of study on LDM and method used in this article.
   导言部分简要介绍立法决策研究的必要性和本文的研究方法。