PCG算法是牛顿法和预优共轭梯度法结合起来解牛顿方程的一种非精确牛顿法。
Newton PCG method is an inexact Newton like method. It is an organic combination of Newton's method and preconditioned conjugate gradient method.
在较为温和的条件下，利用宽松的非精确线搜索条件得到全局收敛性结果，同时数值实验表明了算法的有效性。
Underan inexact line search condition and some other mild conditions, the global convergence was established. Preliminary numerical results show that the proposed method is promsing.
在解决岩土工程非连续变形问题的数值方法中，非连续变形分析方法(DDA)无疑是一种高效、精确的算法。
Among all the numerical analysis methods, the Discontinuous Deformation analysis (DDA) method is an efficient method with high accuracy.
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