近似微分

Considering lower-order modes and fifth-order Taylor series expanded on the electrostatic force, the static pull-in position and voltage in closed forms are obtained; furthermore, the dynamic pull-in voltage are also found based on the analysis on the P.D.

应用Galerkin method 在偏微分方程式使之成为离散之系统，并利用低阶mode与Taylor五阶展开近似静电力去解之，进而可获得静态崩溃电压的位置和封闭式方程式。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。