获得了一类带有连续和分段常数变元的中立型微分方程所有解振动的新的充分条件。
The new sufficient conditions for the oscillation of all solutions of the neutral differential equation with continuous and piecewise constant arguments are obtained.
常数变易法是求解非齐次线性微分方程的一种有效方法。
Methods of constant variation are an efficient solution to all nonlinear 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.
对带有常数滞后的微分方程系统的控制过程，我们给出了最优性的必要条件。
For control process in the systems of differential equation with constant lag necessary condition of optimality of singular control is found.
对于受速率为常数约束的运动质点，可以应用动能定理建立其运动微分方程。
The differential equations of motion of a particle constrained to moving in a constant speed are deduced from the kinetic energy theorem.
本文研究分段常数变量线性中立型泛函微分方程的振动性。
In this paper, we consider the oscillatory properties of neutral linear variable functional differential equation with piecewise constant delays.
文章将建立了具有分段常数滞后变元微分方程组振动的一个充分条件，并讨论其非振动解的渐近性。
The present paper is devoted to the oscillations and nonoscillations of a kind of impulsive delay differential equations with piecewise constant argument.
建立了双参数弹性地基上受压的矩形薄板自由振动位移函数微分方程的一般解，其中积分常数由边界来确定。
A general solution of differential equation for free vibration displacement function of compressed rectangular thin plates on two parameters elastic foundation is established.
通过构造差分方程的周期数列解，研究了一类具有分段常数变元的脉冲微分方程周期解的存在性。
The existence of periodic solutions for a class of impulsive differential equations with piecewise constant argument is studied by constructing periodic sequence solutions of difference equation.
微分散射截面的变化主要依赖于相对介电常数实部、虚部数值较大的一方，并且随粒子取向角的增大而增大。
The variation of DSCS depends on the larger part between real part and imaginary part of dielectric coefficient. The DSCS and azimuth angle are in proportional relation.
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.
从一阶线性微分方程结构特点入手，给出了求其通解的常数变易法的数学原理，并简化了积分因子法。
The existence of particular solutions for a class of Riccati equations is studied by means of variation of constants and initial integral methods.
介绍了二阶线性微分方程的又一种常数变异法。
In this paper, we introduced another method of variation of constant of the second-order linear equation.
利用常数变易法求解具有实特征根的四阶常系数非齐次线性微分方程，在无需求其特解及基本解组的情况下给出其通解公式，并举例验证公式的适用性。
Demonstrated in this paper is how the Constant-transform method, the typical method for solving differential equations of order one, is used in solving linear differential equations of order three.
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, the methods of variation of parameters for salving the Vacco dynamical equations are given.
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, the methods of variation of parameters for salving the Vacco dynamical equations are given.
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