SEO’s strategic value is quickly fading as Google’s growth slows and its prominence in distribution slides away.
SEO策略的价值正在减退伴随这Google的缓慢增长而且它的分配上的杰出也将成为过去。
2
The shadow affect is logarithmic normal distribution, and the multi-path fading is Rayleigh distribution.
阴影效应服从对数正态分布，而多径衰落服从瑞利分布。
3
The probability density function, cumulative distribution function, average level crossing rate and average fade duration of each composite fading channel are analyzed, and some uniform expression.