4．改进牛顿法（Improved Newton Algorithm）［14］115J 传统的牛顿一拉夫逊法是将潮流方程厂（x）＝o用态勒级数展开，并略去二阶及 以上高阶项，然后求解。
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保留非线性潮流算法是为了改进牛顿法在处理病态条件时的缺陷，提高收敛性能而提出的。
The retaining-nonlinearity algorithm was presented in order to ameliorate the limitation left by Newton-Raphson who dealt with morbidity condition, and thus improved the astringency.
在编程技术方面，将改进的牛顿迭代法与函数调用相结合，解决了非线性函数的输入与转移问题。
In respect of programming, the improved Newton iteration algorithm is associated with function designations, therefore input and transfer of nonlinear functions are solved.
实现了两种求解非线性问题的数值计算方法：改进欧拉法和增量牛顿迭代法。
Two calculational methods for nonlinear analysis are adopted, that is, the improved Euler method and the Newton iteration method.
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