The decomposed left matrix of Non-negative Matrix Factorization (NMF) is required to be full column rank, which limits of its application to Underdetermined Blind Source Separation (UBSS).

非负矩阵分解（NMF）要求分解得到的左矩阵为列满秩，这限制了它在欠定盲分离（UBSS）中的应用。

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If a portlet is undefined, such as 10 in the Rank column (Figure 15), you will not be able to input a mapping to that portlet in the ClearQuest profile mapping.

如果有一个入口没有定义，比如Rank栏目中的10(图15)，您将不能输入一个映射到ClearQues t概要文件映射中的中的入口。

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It is usually required that the design matrix is column full rank in applying recursive weighted least squares algorithm.

通常在使用递推加权最小二乘算法时，需要设计矩阵列满秩。

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Rank the remaining tasks by order of importance, and assign all but the top one in each column to your team members.

FORBES: To-do #1: Kill your to-do list