After explaining the EM algorithm, this paper gives the derivation of the multi-user detection algorithm based on the EM method.
在讨论了EM算法的基本原理之后，本文详细推导了基于EM方法的多用户检测算法。
It is also shown that after the derivation of seismograms, high-frequency contents are ameliorated in some degree while low-frequency contents are damaged surely.
同时还表明，对地震记录求导以后，虽然对高频成分有所提升，但与此同时又压制了低频成分。
This term is probably a derivation from seven-year itch, which suggests that happiness in a relationship declines after around year seven of a marriage and people start to get sick of one another.
这个术语大概是从“七年之痒”的表达衍生而来。七年之痒指的是，结婚七年之后，婚姻中的幸福感开始下降，双方开始对彼此心生厌恶。
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