By applying formal asymptotic analysis and Laplace transformation, we obtain two-dimensional model system of linearly viscoelastic "flexural" shell from three-dimensional equations.
应用形式渐近分析和拉普拉斯变换，我们从三维线性粘弹性方程组得到二维线性粘弹性弯壳的数学模型。
Depending on the basic hypothesis and by means of the two methods of Lorentz transformation and the minimum action principle, Maxwell coupled equations are established.
从最基本假定出发，利用洛仑兹变换和最小作用原理两种方法，建立麦克斯韦方程组。
Depending on the basic hypothesis and by means of the two methods of Lorentz transformation and the minimum action principle, Maxwell coupled equations are established.
从最基本假定出发，利用洛仑兹变换和最小作用原理两种方法，建立麦克斯韦方程组。
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