混合信号盲分离问题是一类很难而又具有很强应用背景的问题，以往对这类问题的研究均在混合矩阵为非奇异的条件下进行。

This paper presents an algorithm and a corresponding networks to deal with blind separation of sources in the case of singular mixing matrix.

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利用矩阵的块对角占优、广义严格对角占优以及非奇异m -矩阵的性质及理论，给出了矩阵非奇异的判定条件，拓展了矩阵非奇异性的判定准则。

Based on the properties of block diagonally dominant matrices, generalized strictly diagonally dominant matrices and nonsingular M-matrices. We give the new condition of nonsingular matrices.

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目前，科学家正在试验各种奇异的"非致命技术"，协助警察在不使用武器的情况下，将犯罪分子轻松拿下。

Scientists are testing a range of exotic new "less lethal technologies" to help frontline police officers tackle offenders without using firearms.

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