The displacement vector is biased estimated values, and sometimes, the area where the measuring accuracy is the highest could not have the best ability to detect the deformation.
对没有固定基准的自由网，位移矢量是真实位移的有偏估值，有时精度最高的地方发现变形能力并非最强。
2
According to the rule of transfer with cross section state vector, the internal forces and deformation of cross section are obtained.
利用截面状态矢量的传递规律，求解任一截面的内力和变形。
3
The CA model and FEM are combined, then the differential PCA-FEM algorithm is set up, which attempts to simulate the deformation and failure of rock in the sense of vector.