The differential signal is the spike pulse signal that is produced by differential circuit. Original differential circuit is very difficult to obtain the ideal differential signal.
微分信号是由微分电路产生的一种“尖峰”脉冲信号，原来的微分电路很难获得理想的微分信号。
The mineral resources original value(the mineral resources before exploration)reflects the excess profit, which includes the absolute differential rent and the first differential rent.
未经勘查的矿产资源即有原有价值，体现为超额利润—绝对矿租和第一形态级差矿租。
The uniformly valid asymptotic solution to the original initial boundary value problems was obtained by the theory of differential inequalities.
利用微分不等式理论，得到了原初始边值问题解的一致有效的渐近解。
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