Using the root of the characteristic equation, this paper studies the asymptotic solution of the characteristic equation of the open circular cylindrical thin shells.
本文利用特征方程根的性质，研究了开口圆柱薄壳精确微分方程的特征方程的渐近解。
After analyzing the characteristic of driving coil circuit and kinematics, the system model of multi-staged electromagnetic launcher is built and equation-solution is derived.
在分析了定子线圈电路特征和系统运动特性后，建立了多级电磁发射系统模型，并由此导出了系统方程。
In chapter 4, for 2d nonlinear convection-dominated diffusion equation, a two-grid scheme of characteristic finite-element solution is constructed.
第四章里，对二维非线性对流扩散方程，构造了特征有限元的两重网格算法，并给出了相应的收敛性分析，数值例子。
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