Adopting paraboloid model of tipsurface, presented the dynamics equation of negative ion flight in tip field and solve it with numerical method.
采用针尖的旋抛物面模型，给出了表面生成的负离子在针尖场中飞行的动力学方程，并用数值方法求解。
2
The switch works by passing a pulse of current between the tip and the surface.
电源开关的工作原理是让电流脉冲穿过触点和触面之间。
《柯林斯英汉双解大词典》
3
Atomic force microscopy generates very high-resolution images (about 5-nanometer resolution) by “feeling” the surface of a sample with a tiny probe tip.