The two classes of planar curve generation are DDA(digital differential analyzer)and DCM ( displacementcomparison method).
平面曲线的生成算法主要有DDA（数学微分分析器）和DCM（位移比较法）。
2
To investigate the influence of mechanical boundary conditions on the thermal stress, a comparison of the results between displacement boundary and stress boundary is made.
同时研究了数值分析中温度荷载作用下应力边界条件和位移边界条件对温度应力的影响。
3
By analysis and comparison between the displacement curve in the absence of failure and that in the presence of failure, the causes of clutch failure are known.