finite difference approximation
英 [ˈfaɪnaɪt ˈdɪfrəns əˌprɒksɪˈmeɪʃn]
美 [ˈfaɪnaɪt ˈdɪfrəns əˌprɑːksɪˈmeɪʃn]
有限差分近似
双语例句
- Then the new function space is introduced and the stability problem for the finite difference scheme is discussed by means of variational approximation method in this function space.
然后引入新的函数空间，并在这个空间上，采用变分近似法讨论了该格式的稳定性问题。 - The mode frequencies and the quality factors for the equilateral triangular resonator ( ETR), the square resonator ( SR) and the rhombus resonator ( RR) are numerically calculated by the finite difference time domain technique and the Pad é approximation.
采用时域有限差分和Padé近似计算了等边三角形、正方形和平行四边形微谐振腔的模式频率和品质因子。 - The method uses low-order coarse-mesh finite difference method ( CMFD) as global solution method, and uses coupling correction factors to modify the coupling relationships in the low-order approximation.
使用了粗网有限差分方法（CMFD）作为整体耦合计算方法，同时引入耦合修正因子对低阶近似中的耦合关系加以修正。 - By way of adopting elastic wave equation and finite difference approximation calculating method, the numerical simulation of VSP synthetic record is realized in the paper.
本文采用弹性波方程，通过有限差分近似计算，实现了VSP合成记录的数值模拟。 - A new time domain finite difference method with variable grids of high accuracy is derived by the polynomial approximation, and applied to analyze the variable-angle transmission line discontinuities.
本文通过多项式近似导出了一种可变网格的时域有限差分算法，其空间网格的大小能沿任意轴向变化，而且具有高阶离散精度，从而节省了机时，提高了计算精度。 - In this paper a method for deriving the corresponding finite difference equation in the rectangular coordinate system from the finite difference approximation to Laplace equation in the general orthogonal curvilinear coordinate system has been described.
本文从普遍的正交曲线坐标系中的拉普拉斯（Laplace）差分方程出发，导出了直角坐标系中的差分方程； - Choosing the finite difference approximation of numerical model part according to the characteristic of hybrid model and realizing it
根据复合模型的特点选择数模部分的数值格式并实现数学模型计算 - The three-dimensional finite difference approximation of Mur's absorbing boundary condition is presented in frequency domain. With the discrete formulation of Maxwell's equation for finite difference frequency domain, it is convenient to solve three-dimensional electromagnetic scattering problem.
本文构造了三维Mur二阶吸收边界条件的频域差分离散格式，结合Maxwell方程组频域有限差分方程，可方便地分析三维电磁问题。 - It provides strong evidence and furnishes convincing proof that an accurate finite difference approximation of the Boussinesq equations can be relied upon as a powerful tool for studying short wave disturbance problems within harbors of arbitrary configuration and bathymetry.
这就令人信服地证明，布辛内斯克方程的精确有限差数值解，能可靠地作为一项强有力的工具，来研究在任意平面形态和地形的港口中的波动问题。 - A stable finite difference approximation for vibration equation of beams
梁振动方程的一个稳定的有限差分近似 - The TM set of equations can be solved using a finite difference time domain ( FDTD) approximation that is second-order accurate in both space and time.
采用时间和空间均为二阶精确的有限差分方法，将偏微分方程进行差分化。这样，空间的电磁场可由时间域有限差分法（FDTD）来求解。 - The equations are discretized in space by finite center difference approximation, then the nonlinear differential equations are obtained for the in-plane vibration of the cables-dampers system.
用中心差分法将偏微分方程在空间内离散，导出了系统的面内振动常微分方程组； - Use called finite difference time domain method ( FDTD) a forward modeling for drift ground penetrating radar ( GPR) is established by explicit second order finite difference approximation.
用时间域有限差分（FDTD）法建立矿井地质雷达的模型。 - Currently, two methods are used in Seismic wave field simulation, one is finite element method or finite difference method, the other is ray method based on wave equation and high-frequency approximation.
目前地震波场模拟主要采用两种方法，一类是有限元或有限差分方法，另一类是波动方程的高频近似射线方法。 - Based on shishkin-type mesh, a singularly perturbed nonlinear neutral differential difference equation with negative shift initial boundary value problem is studied. B-spline collocation method and finite difference method is applied on the problem. Estimation of the error between exact solution and approximation solution is given.
讨论了一类非线性中立型奇异摄动微分差分方程初边值问题，并基于Shishkin网格，运用B-样条配置法和有限差分法对问题进行分析和计算并给出了近似解的误差估计。 - The absorbing performance of one dimensional PML is theoretically analyzed and numerically simulated in view of the error caused by finite difference approximation, respectively, whose results show that this theoretical analysis can exactly indicate practical circumstances.
在计及有限差分近似造成的误差下，理论分析和数值模拟了一维理想匹配层的吸收性能，结果表明这种理论分析能完全反映实际情况。 - The finite difference method is a popular and effective numerical method for solving elliptic equation, a number of elliptic equation difference approximation schemes have been constructed up to now.
有限差分法是数值求解椭圆型方程的通用而有效的方法，目前已经有很多建立椭圆型方程差分逼近的方法。 - At present, the numerical algorithms for distributed optimal control problems involve principally the finite difference technique, multi-grid method, finite element approximation and mixed finite element method.
目前，其数值算法主要是有限差分算法、多重网格方法、有限元算法和混合有限元方法等。