给出圆盘上的一些双弦幂积分公式，并由此获得一些重要的性质及双弦幂积分的一些不等式。
In this paper, we calculate the double chord-power integrals on circular disk, and arrive at some important properties and inequalities of the double chord-power integrals.
通过利用“加幂积分器”的方法构造出了一个部分状态反馈控制律，解决了这类不确定非线性系统的有限时间镇定问题。
Through adding a power integrator, a partial-state feedback law is constructed to solve the finite-time stabilization problem of the nonlinear systems.
但对于求幂指函数极限，可重使用等价代换定理，微积分学教程中却没有论及。
In calculus, it has not been proved whether or not the equivalent substitution theorem can be applied to the limit calculation of power-exp ential factions.
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