It has proved thatthe equation of attenuation curve is a Arps hyperbolic curve which decline exponent is 0. 5 and the attenuation parameters (a, b and c) have the relation of b=ac constantly.

• 证明了衰减曲线即递减指数为0.；5时的Arps双曲线，也证明了衰减参数a、b、c之间始终满足b=ac的关系。