相互独立的随机变量 meaning in English

mutually independent random variables

Let be a sequence of independent and identically distributed random variables ， with mean and variance . while the distribution function is unknown ， and is large ， then is a normal approximation distribution
3设相互独立的随机变量服从同一分布，已知均值为，方差为.单分布函数未知，当充分大时,近似服从正态分布
We divide document image into two parts - text and background . text area is regarded as a series of random variables with 0 - 1 distribution and background area as a series of random variables with degenerate distribution . because the median filter is robust for degenerate distribution , it can reduce the noise
文本图像通常可以转换成二值图像，我们可以把文本图像的文字区域和空白区域分别理解为两个相互独立的随机变量序列的依次观测，其中一个是服从两点分布，而另一个服从退化的单点分布。