1、

This paper discusses the drawing of hyperbola normal through a point outside the hyperbola and points out the unsolvability of geometric drawing method and the unintegrality of optimization method.

对过双曲线外一定点的法线作图问题作了探讨,提出了几何作图法的不可解性及优化法解的不全性。

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2、

Quantitative Analysis and Online Recovering Control of Power Flow Unsolvability

电力系统潮流计算不收敛的机理分析及其在线恢复控制

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3、

This introduced the idea of relative computability, or relative unsolvability, which opened up a new field of enquiry in mathematical logic.

这就引入了“相对可计算性”的观点,或者说相对不可计算性,于是开创了一个数理逻辑的新领域。

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4、

So far as present cryptanalytic methods are concerned, the cipher systems derived from some of these machines are very close to practical unsolvability.

以目前的密码技术来看,这些机器的性能是手工操作完全无法达到的。

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5、

The unsolvability of implicit equations existing in the inversion algorithm in the inverse system method ( ISM) is considered, and a constructive inversion algorithm is presented for general nonlinear systems so as to avoid solving implicit equations via elimination method.

针对由于逆系统方法之求逆算法中求解隐函数方程的困难,通过消元法避开对隐函数方法的求解,提出了一般非线性多变量系统的构造性求逆算法。

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