一阶差分就是离散函数中连续相邻两项之差。当自变量从x变到x+1时，函数y=y(x)的改变量∆yx=y(x+1)-y(x)，(x=0，1，2，......)称为函数 y(x)在点x的一阶差分，记为∆yx=yx+1-yx，(x=0，1，2，......)。
一阶差分方程 [数] first order difference equation ; first difference equation
一阶差分法 first difference method ; method of first difference
一阶差分变换 [数] first difference transformation
一阶差分GMM first differenced GMM
表一阶差分运算因子 first-difference operator
一阶差分算子 [数] first difference operator
一阶差分散点图 first order difference plot
取一阶差分 first difference
一阶差分麦克风 first-order differential microphone
一阶差分傅立叶算法 first order differential fourier algorithm
将视电阻率曲线与视电阻率一阶差分曲线应用于岩土工程施工中。
To effectively make use of resistivity information, apparent resistivity and its difference curve are used respectively in engineering and compared them.
对缓时变物理量的实时监测的情况，采取了一阶差分方程取代的方法。
Under the circumstance of the real time monitor for the low-frequency variables, the method of one order difference equation has been proposed. At last, an example of its application is given.
通过单位根检验，确定硬麦期货与现货价格序列具有一阶差分平稳性即i(1)过程。
The article educed that the series of hard wheat futures and spot prices show their first-order difference stationary, I (1) process, by the unit root test.
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