非数值算法

These numerical tests show that the inex-act self-adaptive alternating direction method and the new alternating direction methodare e?

最后，我们对非精确自适应交替方向法和新交替方向法给出了数值实验结果，证实了算法的有效性。

Research results show that the combination of the EMD and the WD is able to more effectively identify the characteristic signals of the original series.

通过数值试验验证了BG算法处理非平稳时间序列的有效性和尖峰噪声、随机扰动等对检测结果的影响较小。

A numerical calculation program is written up for the various solution methods in this paper and the program is being used in various aspects of inverse problem of environmental hydraulics, including inverse problem in reverse process of one-dimensional unstable diffusion, inverse problem in reverse process of convection-diffusion, inverse problem for the dispersion coefficient in water quality model, The inverse problem of coefficient identification for nonlinear Boussinesq equation, parameter identification inverse problem for water quality model, the inversion of parameter of BOD-DO water model, the inverse problem of the source of convection-diffusion, identification of the steady-state permeability for two dimensional isotropic medium, two-dimensional steady inverse problem of convection-diffusion and parameter identification inverse problem for two-dimensional parabolic equation, etc.

对本文提出的各种算法，编制了数值计算程序，并把它应用于环境水力学反问题诸多领域，包括污染物一维非恒定扩散逆过程反问题，对流扩散方程逆过程反问题，河流水质纵向弥散系数反问题，非线性Boussinesq方程反问题，河流水质多参数识别反问题，BOD-DO水质模型参数反演问题，对流—扩散方程源项反问题及二维恒定各向同性介质渗透系数反问题，二维定常对流——扩散方程及二维抛物型方程参数控制反问题等。

Wavelength requirements, fair factor and wavelength reusability of ring and real networks are systematically analyzed under uniform and non-uniform traffic patterns. Numerical results show that the heuristics can achieve a great performance of load balancing and wavelength resources are utilized efficiently.

我们以环形网络和实际网络为例，对均匀和非均匀业务模式下网络的波长需求、网络的均衡因子和波长重用度进行了系统的分析，数值结果表明本文的启发式算法能获得良好的负载均衡性能并有效地利用了网络的波长资源。

Nonmonotone trust region method applies nonmonotone technique to trust region method, which does not restrict a monotone decrease of the function value at each iteration.

非单调信赖域方法把非单调技术应用到信赖域方法中，不要求函数值在每一步都下降，有利于算法的收敛，特别是在坡度陡的低谷地带。

This paper discusses the analog source to quantify the optimal algorithm, and use C language implementation of the Gaussian source at different quantization levels under the uniform quantizer and the optimal non-uniform quantization step size of the numerical calculation.

文中探讨了模拟信源量化的最优算法，并用C语言实现了高斯信源在不同量化电平下均匀量化和非均匀量化的最优步长的数值计算。

The stability and convergence of the fully discrete solutions are proved and the convergence order is also given.

从数值实验上也验证了该算法的可行性和高效性，对非定常N-S方程提出了一种新的全离散TGM：空间离散用标准FEM，时间离散用Crank-Nicolson格式，证明了全离散解的稳定性与收敛性。给出了收敛阶。

Firstly, based on the method of pressure-velocity coupling introduced by SIMPLE algorithm and a revised method of solving the unsteady equation of stream function and vorticity on uniform grid, a special algorithm called primitive-variable-time-dependent approach is formed in the present study. In this algorithm the Navier-Stokes equation in primitive variable form is solved by using the time-dependent approach on non-uniform staggered grid system. The second-order accuracy finite difference is used for the first and second partial derivatives of all variables of the convective terms and diffusion terms.

首先，本文在SIMPLE算法系列处理速度与压力耦合问题的思路和均匀网格下改进的关于流函数涡量方程的数值求解方法的基础上，将非定常原始变量Navier-Stokes方程的求解推广至非等距交错网格剖分，形成了具有本文特色的原始变量时间推进方法，其中对流项和扩散项中各变量的各阶导数均采用二阶精度公式，包括温度在内的离散方程组采用ADI迭代方法求解。

In chapter 2 and chapter 3,the nonoverlapping DDMand overlapping DDM based on natural boundary reduction for 2-D exteriorHelmholtz problem are studied respectively,the convergence and the conver-gence rate of these algorithm are discussed,some numerical results are given.

其次，分别研究二维Helmholtz方程外问题的基于自然边界归化的非重叠型和重叠型区域分解算法，分析了这些算法的收敛性和收敛速度，并给出了数值算例。

Based on the mathematical model and the Romberg numerical integrating algorithm, an array with 40 sets of data was obtained to describe the aspheric surfaces. By fitting the data with the method of the nonlinear least square, the sag's analytical equations of aspheric surfaces were obtained.

根据基于几何光学原理导出的系统理论模型，采用龙贝格数值积分算法得到40组描述非球面的数据，非线性最小二乘法拟合数据，获得两个非球面矢高解析式。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。