提出了一种新的用于未知数量稀疏源盲分离的统一方法。
A new unified method for the blind separation of sparse sources with unknown source number is proposed.
此外，未知数量的甲烷以水合物(或气水化合物)的形式被困在极地海洋海底之下。
Additionally, an unknown quantity of methane in the form of hydrates (or clathrates) lies trapped beneath the polar sea floors.
那些在已知的但未经控制的过程之间尚有未知数量的开发过程未被确认。
An unknown number of development processes that bridge known but uncontrolled processes are unidentified.
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