Take double parameters foundation model to improve Winkler model, and use finite difference method to resolve linear basis under columns and get linear equations which could be easily used in works.
采用双参数地基模型来改进温克尔地基模型，并用有限差分的方法求解任意荷载下条基的微分方程，得到便于工程计算的线性方程组。
A quasi static approach is presented for ductile tearing test of double cantilever beam specimen by using the model of elastic beam on elaso plastic foundation.
对典型结构钢的双悬臂梁试件的中低速韧性撕裂的实验进行了准静态模拟。
The foundation of DNA double spiral structure model is the miracle and milestone in the history of life science. It has epoch-making significance.
DNA双螺旋结构模型的建立，是生命科学史上的奇迹和里程碑，具有划时代的意义。
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