A function that takes two random variables and computes their expectation value and variance.

X9.17随机数生成算法，使用到了Triple DES算法，MD5算法，RC4算法，信息安全技术实验-X9.17 random number generation algorithm used to Triple DES algorithm, MD5 algorithm, RC4 algorithm, Information Security Technology Experiment

首先利用现有文本训练trigram模型，再用模型随机生成n个单词的文本-First, the use of existing training trigram model text, and then the model is randomly generated n-word text

随机一维面生成。自己刚开始学者写的，初学者可以参考-Random one-dimensional surface generation. They have just begun to write, beginners can refer to