另外把化学传感器看成一个线性定常（lineartime-invariant，LTI）系统，建立方程模拟其在单位浓度脉冲信号作用下的响应曲线，模拟结果与实际响应曲线有较好的一致性。
We treated the chemical sensor as a linear time-invariant ( LTI ) system , and equations were established to simulate the response curves caused by an impulse signal of analyte concentration .
单位脉冲信号