Second, a criterion of the stability of relative motion for the nonholonomic mechanical systems was obtained by using the equation of variation of energy.
其次，基于能量变化方程，给出了非完整力学系统相对运动的稳定性的一个判据；
The mass transfer equation was introduced into heat transfer model of falling film evaporation. The radial velocity, mass diffusion coefficient and variation of film thickness were taken into account.
将传质方程引入到垂直管降膜蒸发传热模型中，求解时考虑了径向速度、质量扩散系数和膜厚变化对传热的影响。
The first one is the artificial method in adjusting to the time step, which can be realized by controling the variation of operator energy in equation artificially.
在人工调节时间步长法中，通过人为控制方程中算子能量变化的办法调整时间步长；
Wave equation time migration fails to image subsurface geological structure correctly in the case of obvious lateral seismic velocity variation.
当介质的速度在横向上存在较大的变化时，波动方程时间偏移不能使地下的构造正确成像。
The variation equation describing distance dependence of the beam waist of a fundamental Gaussian beam with high intensity propagating in logarithmically saturable nonlinear media has been deduced.
导出了在对数饱和非线性介质中传播的强激光基模高斯光束宽度随传播距离变化的方程。
Derives an equation set to reveal the influence of water flow variation on temperature of the heated room and permitted fluctuation of the hydraulic imbalance degree of pipeline.
推导出了水流量变化对供暖房间温度的影响以及管路水力失调度允许波动的取值范围，指出循环水量减小时对室温的影响较水量增加时为大。
In this paper, we introduced another method of variation of constant of the second-order linear equation.
介绍了二阶线性微分方程的又一种常数变异法。
A new conception of power per unit impedance is defined and the basic equation to express the variation of load voltage magnitude with the variation of its dynamic equivalent impedance a.
定义了单位阻抗功率的新概念，推导了电压幅值随其等值阻抗和单位阻抗功率变化而变化的基本方程序。
So the model was simplified without consideration of the viscosity variation, and an equation for contamination concentration distribution caused by elevation difference was developed.
在此基础上简化模型，推导出了高差混油浓度分布的基本方程。
Transcendental equation and parameters of ferrite materials prepared by ourself have been used to calculate the variation of differential phase with temperature.
再利用超越方程和我们制备的铁氧体材料的参数对其差相移随温度的变化进行数值计算，结果表明随温度的升高差相移减小。
In this paper, parametric variation method is used in kinematic equation of series excitation direct current motor with different turning velocities.
本文用参数变异法给出串激直流电动机在不同转速情况下的运动方程的解析解，以拓宽人们分析这类问题的思路。
It is deemed that with the variation of time extension, the dispersion equation should be an ellipse rather than a circle.
文章认为，在时间伸展变换的情况下，频散方程将不是一个圆，而是一个椭圆。
So rock resistivity dispersion has a bearing on the variation of the parameters of Archie equation.
因此，岩石电阻率频散性影响着阿尔奇参数的变化。
An universal dynamic equation for unrestrained body has been derived in the form of tensor by using variation method.
用张量形式通过变分原理导出了无约束物体的动力学普适方程。
Further study on this basic phase-variation equation results in the variation equation of the critical temperature of double hexagonal prism superconducting network in foreign field.
由此方程出发，计算了双层六角棱柱超导网络的临界温度随外磁场的变化关系。
Based on the continuity equation of ground water and the variation principle, the seepage differential equation can be acquired.
根据地下水的连续方程和变分原理建立渗流场微分方程。
Based on this knowledge, the grinding kinetic equation of coal characterized by particle size is presented. It can reflect the variation of particle size of coal during the grinding process.
在此基础上，建立了以粒度表征的煤粉碎动力学方程，用以反映粒度大小在粉碎过程中的变化特征。
The nonlinear equation for remote sensing of water vapor was linearized by means of variation method. The effective range of linearized equation is examined.
运用变分的方法将遥感水汽的非线性方程线性化，讨论了线性化遥感方程的适用范围。
At present, an adiabatic throttle model based on BWRS equation of state is used to obtain the temperature variation of Ban876 UGS's RNG at constant enthalpy condition.
为此，利用基于BWRS状态方程的绝热节流模型计算了板876储气库回采天然气的高压节流温变等焓线。
The differential equation for the vibration of the riser system is derived by means of functional calculus of variation.
采用泛函变分法导出了隔水管的振动微分方程。
The variation of twist with time is represented by a false-twist equation.
在假捻过程中捻度随时间变化的规律一般用假捻方程表示。
The variation equation of the satellite orbit elements under both J2 and drag perturbations was derived based on the Gauss perturbation equation.
基于高斯摄动方程，推导了卫星在同时考虑J2和大气摄动情况下的轨道根数变化方程。
Based on the elastic theory of liquid crystal and variation theory, the effect was studied, and the differential equation and boundary condition about the director of liquid crystal were obtained.
基于液晶弹性理论研究了这一效应，通过变分理论得到了液晶指向矢满足的微分方程及边界条件。
This paper analyzes T-shape equivalent circuit, establishes starting torque function equation with the variation of requency and starting current function equation with the variation of requency.
本文通过分析T形等效电路，建立了电机启动转矩随频率变化的函数方程，建立了电机启动电流随频率变化的函数方程；
In this paper, a transition matrix of blower blade is set up by the variation equation of stead flow of gas.
本文利用稳态气流的变更方程，建立了风机叶轮的转移矩阵。
The equation was solved with the finite difference method and the variation of the temperature in the insulation layer was concluded.
采用数值差分法可以求解出绝热层内部温度变化规律，从而推出储罐内液体的温度和压力的变化规律。
According to the development condition of zero flux plane, it can be divided into steady condition equation and variation condition equation.
在计算时段内，根据零通量面发育状态不同可分为零通量面稳定条件下的计算公式和零通量面移动条件下的计算公式。
In this paper, using total differentiation method and variation of constants, we give general solution formula of Bernoulli equation with different methods.
本文使用全微分法和常数变易法，从不同角度给出伯努利方程通解的公式。
In this paper, using total differentiation method and variation of constants, we give general solution formula of Bernoulli equation with different methods.
本文使用全微分法和常数变易法，从不同角度给出伯努利方程通解的公式。
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