1) first order
一阶
1.
In this paper,we use the coincidence degree theory to establish new results on the existence and uniqueness of T-periodic solutions for the first order neutral functional differential equation of the form(x(t)+Bx(t-δ))′=gl(t,x(t))+g2(t,x(t-τ(t)))+p(t).
利用重合度理论研究并获得了如下一类一阶中立型泛函微分方程T-周期解的存在与唯一性(x(t)+Bx(t-δ))′：g1(t,x(t))+g2(t,x(t-τ(t)))+p(t)。
2.
The time-space bi-m degree discontinuous finite element to solve first order hyperbolic system with variable coefficients is discussed.
讨论变系数一阶双曲组的时空双m次间断有限元解。
3.
This paper studies the oscillatory behaviour of a class of the first order linear functionaldifferential equations and obtains some sufficient conditions for the oscillation of all solutions ofthe equations.
在本文中，作者研究了一类一阶线性泛函微分方程的振动性质，获得了一些使方程的所有解振动的充分条件。
2) first-order
一阶
1.
The Distribution of Zeros of Solutions of First-order Advanced Differential Equations;
一阶时超微分方程解的零点分布
2.
A general form of impedance function of first-order one-port network is represented by two-port parameters.
用二端口网络参数推出了一阶一端口网络阻抗函数的一般形式,分析了各项物理意义,提出了通过计算或测量三个特定一端口电阻电路的等效电阻来求解阻抗函数及其等效电路的三电阻法,它为使用计算机或通过实验测量来确定一阶一端口网络阻抗函数及其等效电路提供了简便易行的方法。
3.
An exact solution was obtained by solving the first-order shear deformation .
根据层合复合材料壳体的一阶剪切变形理论(FSDT),同时求得其精确解和声波方程。
3) First derivative
一阶导数
1.
Methods:First derivative spectrometry was established.
方法:采用一阶导数分光光度法,测定波长为275nm和317nm。
4) first step
一台阶
1.
Oil-geological characteristics of the deep zone in the first step of Hu-qing oilfield in the Dongpu sag are thoroughly analyzed.
分析了东濮凹陷胡庆油田一台阶深层的石油地质特征,总结了一台阶深层烃源岩生烃潜力、储集层类型和盖层条件,讨论了深层油气成藏配套史。
5) first grade terrace
一级阶地
1.
Lithologic characteristics of the unsaturated zone and its impact on adsorption and degradation of pesticide in the first grade terrace of Songhua River;
松花江一级阶地包气带岩性特征及其对农药吸附与降解的影响
6) First-derivative
一阶导数
1.
Determination of the content of allantoin in allantoin-vitamin E cream by zero-crossing first-derivative spectrophotometry;
零交一阶导数分光光度法测定尿囊素维E乳膏中尿囊素含量
补充资料：N阶行列式
设有n2个数，排成n行n列的表 ,作出表中位于不同行不同列的n个数的乘积，并冠以符号(-1)t，的形式如下的项,其中为自然数1,2,...,n的一个排列,t为这个排列的逆序数.由于这样的排列共有n!个,这n!项的代数和称为n阶行列式
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条