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作者采用二阶线性系统来描述均匀电流场中形状简单的极化体的特征。这种地电断面对阶跃讯号的响应是两个指数函数的线性组合,研究表明,系统的两个时间常数只与地球物理参数有关,对整个观测剖面来说它们的值是不变的,两指数函数前之系数,除与地球物理参数有关外还与几何因子有关,在剖面上不同测点,两系数的数值与符号是可变化的。因此,可能有8种不同类型的放电曲线。作者还研究了充电持续时间对放电曲线的影响。理论计算结果可以很好地解释J．伯廷、J．洛布和傅良魁的野外实测资料和模型实验结果,并指出可能存在而尚未被发现的现象。作者认为本文所采用的理论研究方法可应用于更复杂的情况．
The authors use second-order linear systems to characterize simple shaped bodies in a uniform current field. The response of the geoelectric section to the step signal is a linear combination of two exponential functions. Studies show that the two time constants of the system are only related to the geophysical parameters, their values are constant for the entire observation section, The coefficients before the exponential function are related to the geometry factor in addition to the geophysical parameters. The values and sign of the two coefficients are variable at different measuring points in the profile. Therefore, there may be 8 different types of discharge curves. The authors also studied the effect of charging duration on the discharge curve. Theoretical calculation results can be well explained. Burlington, J. Rob and Fu Liangkui field measurements and model experimental results, and pointed out that there may exist but not yet discovered the phenomenon. The author believes that the theoretical research methods used in this paper can be applied to more complex situations.