:ＤＥＳ体制是ＩＳＯ颁布的数据加密标准,通过对ＤＥＳ算法的分析,提出了用Ｃ语言实现数据加密标准ＤＥＳ算法,通过循环或迭代,将简单的基本运算(例如左移、右移、模2加法等)和变换(选择函数、置换函数)构造成数据流的非线性变换(加密变换或解密变换),从而实现对计算机数据进行密码保护。着重介绍了用Ｃ语言实现其加密的主要过程。关键词:数据加密 ＤＥＳ Ｃ语言-: DES system is ISO issued by the Data Encryption Standard, DES algorithm

DMC控制由于具有对模型精度要求低，控制精度高鲁棒性强等优点可有效的克服过程的不确定性、非线性和关联性，并能方便的处理过程被控量和操纵变量中的各种元素。所以对该系统应用DMC控制方法进行MATLAB仿真。-DMC control accuracy because the model has low and high control precision and strong robustness advantages of the process can effectively overcome

Essentially non-oscillatory (ENO) and Weighted ENO (WENO) are finite difference or finite volume schemes. The first ENO scheme is constructed by Harten et. al. in 1987. The first WENO scheme is constructed in 1994 by Liu,Osher and Chan for a third or