俺脚的没必要把意大利夸大成德国的克星

tenterpool 发表于 2015-4-14 20:00
请你贴出来不等号是不平稳的定义的证据，贴不出来就承认自己造谣

傻子你就别再满地打滚了，你给的链接里就有证据，你看不懂？

“A stochastic process (a collection of random variables ordered in time) is said to be (weakly) stationary if its mean and variance are constant over time. By contrast, a nonstationary time series will have a time-varying mean or a time-varying variance or both.”

时间可变的意思是什么？mu(x(t))不等于mu(x(t+1))，懂了吗？傻子

krete1941 发表于 2015-4-14 20:23
傻子你就别再满地打滚了，你给的链接里就有证据，你看不懂？

“A stochastic process (a collection o ...

请你贴出来不等号是不平稳的定义的证据，贴不出来就承认自己造谣