它们唯一共同之处就是,它们都被叫作一阶微分算子。
The only thing they have in common is that both are what's called a first order differential operator.
采用柱螺旋坐标系，把广义磁流体力学方程组简化为四元一阶微分方程组。
In cylindrical helical coordinates, generalized magnetohydrodynamic (MHD) equations are reduced to four first order differential equations.
在已有的几种混沌信号的控制方法基础上，提出了用状态变量的一阶微分反馈法。
Based on existed methods of chaotic control, a method of controlling chaos is proposed, in which only a single variable differential feedback is used.
可分离变量的一阶微分方程是一类特殊的一阶微分方程，它在实际中有着广泛的用途。
Separable variables are a special class of first order differential equations, which has a wide range of USES in practice.
对于土壤含沙量的预测而言，认为在PLSR模型下，一阶微分处理的预测效果最好；
On the whole, the prediction precision of PLSR model was better than PCR's for both sand content and moisture content predictions.
现场检测表明，利用一阶微分处理后的磁记忆信号定位特征，可准确地对焊接裂纹进行检测。
Spot inspection indicates that the welding cracks can be evaluated exactly by the location feature of derivative MMM signal.
应用改进后的基于一阶微分期望值的亚像素边缘检测算法，可以快速、精确地检测到边缘的位置。
Using improved sub-pixel edge detecting algorithm based on the expectation of first-order derivatives, we can fast and precisely detect the edge position.
提出了对图像数据进行一阶微分并求其局部重心点作为其边缘特征点，以提高测量稳定性和测量精度。
It gets the first order differential of the image data and acquires its local center of gravity as characteristics of the edge so as to improve the accuracy and stability.
本文研究了两类具体含逐段常变量微分方程的伪概周期解的存在性问题和一类一阶微分方程组的数值解。
In this paper, the existences of almost periodic solutions and pseudo almost periodic solutions for several classes of functional differential equations are investigated.
可以证明本系统的这种观测量是伺服阀的负载压力，而所谓补偿器是一个一阶微分环节，因而容易实现。
It also testifies the intermediate variate in the system is servo valve loading pressure ; compensator is a first derivative element.
通用模型控制是一种有效的非线性控制方法，但该方法的应用条件是过程一阶微分模型必须要有显式解。
Common model control (CMC) is an effective nonlinear control method, but its application condition requests explicit solution for the first order differential model of the process.
介绍了针对幅值突变信号及一阶微分有突变的信号利用多分辨分析进行突变征兆提取的理论及方法，并给出了仿真实例。
The extraction theory and method of fault signal jump omen based on multi-resolution analysis are introduced, and a simulation example is presented.
出于算法运行速度和准确性的考虑，着重研究了QRS波检测的两种算法：一阶微分窗口积分法和小波时间-尺度检测法。
On account of the operation speed and accuracy, we researched two algorithms used in QRS detection: derivative-window method and wavelet-based method.
研究结果表明，原始光谱经均值中心化、一阶微分和正交信号校正预处理后，运用多元线性回归法所建葡萄糖和果糖定量分析模型最优。
The MLR mathematical model that established with orthogonal signal correction plus first derivative and mean centre preprocessed spectra shows the best result for glucose and fructose.
通过在积分换元、微分方程求解、多（一）元复合函数求全微分、偏导数及高阶偏导数中的应用举例，论述了一阶微分的形式不变性在微积分学中的作用不应被忽略。
Based on the theory of differential geometry and geodesy, the second order differential equation and the first differential relationship are derived on the regional earth ellipsoid in this paper.
本文试应用求解一阶线性微分方程的方法导出几类常见的函数项级数的求和公式。
The sum formulas of several kinds of ordinary series with function term are deduced by using the method of solving linear differential equation.
采用了压缩性的坐标变换后，推导得到了五个一阶导数的微分方程组。
Using a compressibility coordinate transformation, a set of the first derivative differential equations has been derived.
在第二部分中，同样的方法，我们讨论了一阶脉冲微分方程积分边值问题。
In part II, by the same way, we consider first-order impulsive differential equations with integral boundary value problems.
根据一阶拟线性偏微分方程组的特征理论，讨论内弹道两相流方程组的类型。
Following the theory on characteristics of first order quasi-linear partial differential equations, classification of the balance equations for two-phase flow in interior ballistics is discussed.
本文主要用首次积分法构造一阶拟线性偏微分方程始值问题的解。
The fist integration is mainly used tO form the initial value solution of fist order quasi-linear partial differential equation.
提出一阶非线性常微分方程新的可积型，且给出其通解的参数形式。
Proposed a new form of non-linear first-order ordinary differential equation, meanwhile, it shows the parameter form of universal solution.
传输线可以看作集中参数二端口网络的级联，其数学模型—电报方程是一阶双曲型偏微分方程组。
Telegraph equations, can be looked as cascade connection of two-port network of lumped circuit of transmission line, is a hyperbolic partial differential equations.
目的研究一阶具有分段常数变量的脉冲微分方程的解的性质。
Objective to investigate characters of the solution to first order impulsive differential equations with piecewise constant arguments.
摘要通过对积分算子谱的估计，作者给出了一阶线性微分差分方程在边值条件下解的存在唯一性定理。
In this paper, by estimates of spectral of an integral operator, the authors give a theorem on the existence of solutions for first order differential difference equations with boundary condition.
本文研究一阶非线性中立型泛函微分方程的振动性。得到了该方程振动的充分性判别法则。
This paper deals with the oscillation of the first order nonlinear neutral type functional differential equation, and obtains sufficient criterion of the equation oscillation.
有关算符的统计平均值随时间的演化满足一个封闭的一阶线性微分方程组。
The statistical average values of some relevant operators satisfy a set of differential equations of the first order.
本文研究了既有滞后量又有超前量的一阶中立型常系数微分方程的振动性，得到了其振动的几个充分条件。
In this paper, we have studied the oscillation of the first order neutral functional differential equations with delay and advanced argument, obtained, some sufficient conditions extended and impoved.
机翼的运动方程可以写成四维一阶常微分方程，取广义气流速度和线性俯仰刚度作为分岔参数。
The monition equations of airfoil are written as the four dimensional first order differential equations. Taking airspeed and the linear part of pitching stiffness as the bifurcation parameters.
针对该微分方程的非线性特点，采用一阶谐波平衡法，进行了动力响应的计算分析。
The harmonic balance method(HBM)was employed to solve the forced response of damped blades considering nonlinear feature of differential equations.
针对该微分方程的非线性特点，采用一阶谐波平衡法，进行了动力响应的计算分析。
The harmonic balance method(HBM)was employed to solve the forced response of damped blades considering nonlinear feature of differential equations.
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