biquadrate

The biquadrate vibration equation for fork-probe-sample system is established, the relations between the electric current of the fork and T-S distance ( I-d curves) are analysed theoretically, and the mechanism model of the shear force between the optic fiber probe and the sample is established.

研究了石英调谐音叉控制T-S间剪切力作用的机制，建立了音叉T-S系统的振动方程，理论分析了音叉电流I和T-S间距d的关系，建立了T-S间剪切力作用机制模型。

The case of biquadrate Bezier surface and bicubic Bezier surface are studied to estimate error of arbitrary point in curved surface in Matlab.

以较为简单的双二次Bezier曲面和较复杂的双三次Bezier曲面为例，对曲面上任意点的不确定性进行了研究，用Matlab编程实现。