perturbation equation meaning in English
扰动方程式
摄动方程
微扰方程
Examples
- A method for deriving the perturbation equation
直接推导摄动运动方程的一种方法 - In order to simplify the perturbation equation , we assume that the system is homogeneous in equilibrium state and poisson ' s equation describes only the relation between the perturbed density and potential function
为了简化方程，假定平衡时的系统是均匀的, poisson方程只建立扰动后的密度和势函数之间的联系。 - It is also introduced the task and composition of the system . secondly , in order to studying the dynamic characters of the bomb , the vertical and side direction perturbation equations of the bomb are analyzed . moreover , the transfer functions of the bomb are identified
第二，为了研究弹的动态特性，利用小扰动法将微分方程线性化，得到弹体纵向、侧向扰动方程组，用系数冻结法推导出简易制导炸弹的传递函数。 - The fourth - order explicit upwind - biased compact difference schemes are used in the spatial discretization of the nonlinear convection terms . these difference schemes can be used in all computational region including the boundary neighborhood , and can overcome the difficulty not adapting simultaneously in the boundary neighborhood for general three - dimensional fourth - order central difference schemes , and improve computational stability a nd resolution . the compact difference equations with high accuracy and resolution for solving the incompressible n - s equations and perturbation equations are composed of these compact difference schemes , and provides an effective numerical method for the investigations of the turbulent spots and coherent structures
文中发展了四阶时间分裂法用于navier - stokes方程及其扰动方程的时间离散；对分裂得出的关于压力的poisson方程和关于速度的helmholtz方程，建立三维耦合四阶紧致迎风差分格式；这些格式适用于包括邻近边界点在内的计算区域，克服了三维各自用四阶中心差分格式离散不适用于边界邻域的困难，并提高了稳定性和分辨率，用这些格式分别组成了数值求解navier - stokes方程及其扰动方程的高精度、高分辨率的紧致差分方程组，为湍斑及湍流相干结构的研究提供了有效的数值方法。