The signal average method was used in order to increase the S/N ratio, and the optimum sweep time and average times were experimentally determined.
为了提高信噪比，采用了信号平均技术，并通过实验确定了最佳采样时间和平均次数。
N fertilization in both plantations significant decreased the biomass of the first five order roots by the method of soil cores in four sampling seasons and two soil depths.
施杀虫剂处理导致两林分四个季节、两个土层中细根生物量显著增加，但是，两树种仅前两级根的生物量显著增加。
N this paper, four factors method for calculating the first-order linear circuit is proposed. Concerned with the forced response in this method, two kinds of new calculating methods are presented.
本文提出了计算一阶线性电路的四要素法，对该法中的强制响应提出了两个新的计算方法；
We first introduce three methods of finding the sum of the first n terms for an arithmetic sequence of higher order, and then display another method by some formal derivatives of which are defined.
首先，简要介绍了三种主要的求和方法。然后，根据高阶等差数列通项的特性，利用新定义的形式导数列对其进行了有效的探讨。
We first introduce three methods of finding the sum of the first n terms for an arithmetic sequence of higher order, and then display another method by some formal derivatives of which are defined.
首先，简要介绍了三种主要的求和方法。然后，根据高阶等差数列通项的特性，利用新定义的形式导数列对其进行了有效的探讨。
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