在线性方程组求解的过程中采用了PCG法，增强了对病态方程组的求解能力。
PCG is used to solve the linear equations, boosting the ability for morbid equations.
利用自然水平函数，将众所周知的阻尼牛顿法进行推广，用于求解病态非线性方程组。
By using the so-called "natural level functions", we extend the well-known damped Newton method to solve ill-conditioned systems of nonlinear equations.
利用自然水平函数，将众所周知的阻尼牛顿法进行推广，用于求解病态非线性方程组。
Using natural spline functions with multiple knots, we discuss the extended Sard approximation of Linear functional.
利用自然水平函数，将众所周知的阻尼牛顿法进行推广，用于求解病态非线性方程组。
Using natural spline functions with multiple knots, we discuss the extended Sard approximation of Linear functional.
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