Singular function is an important distribution function of the singular random variable. It is studied widely.

奇异函数是一极为重要的奇异型随机变量的分布函数，被广泛研究。

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The controllability distribution problem of nonlinear singular control systems is studied.

研究非线性奇异控制系统的能控性子分布问题。

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The concept of controllability distribution is introduced for nonlinear singular control systems, and the feedback invariant properties of this controllability distribution are discussed.

提出了非线性奇异系统的能控性子分布的概念； 研究了非线性奇异系统能控性子分布的反馈不变性质；

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