After considering the interaction between electrons, the problem of a semiconductor interacting with light is discussed and the equation of exciton polarization wave excited by light wave is obtained.
Methods: Electrochemical technique was adopted to detect the changes of anode polarization curves of TA2 and TC4 after welding with laser or pulsed tungsten argon arc.
方法：采用动电位极化技术，分别测定激光焊接及脉冲氩弧焊接TA2和TC4后，材料阳极极化曲线的变化。
3
By the measured results of pipe to soil polarization potential after one year, it is shown that the design is reasonable and the technical targets fulfil the design requirements.