numerical problems meaning in English
数值问题
Examples
- Firstly , we want to solve the problem that based on the background of some numerical problem . it is the special nondifferentiable optimization problem
本文首先来解决以某些数值计算问题为背景提出的一类比较特殊的非光滑优化问题。 - In recent years , nonlinear methods have attracted more and more attention and there have been some successful cases , such as median filter , mathematical morphology , etc . as a preferred way to inverstigate nonlinear numerical problems , the continued fractions method can effectively express the gradually changing data or abrupt data , so it is meaningful to study image processing by means of the continued fractions theory and algorithms
近年来在图像处理领域，利用非线性方法进行图像处理取得较好效果的有中值滤波、数学形态学等，非线性方法已引起越来越多研究者的重视。作为研究非线性数值问题的首选方法?连分式方法，不仅能反映数据的渐变性，也能反映数据的突变性。鉴于这些原因，本文将连分式插值和逼近引入到数字图像处理领域，开展了图像插值、图像重建等方面的研究。 - An improved finite volume technique and total variation diminish scheme has been presented for solving the numerical problem with complex flow gas and space time processing synchronously , based on analysis of some numerical method for increasing the convergence , precise and strong capture capacity of shock wave
针对高压sf _ 6断路器气流场求解的复杂性和特殊性，在对常用气流场数值求解方法应用特点分析的基础上，本文采用改进的有限体积tvd格式进行断路器气流场数值求解，提高了解的收敛性、准确性和激波的捕捉能力。 - This paper introduces the basic concepts of object - oriented programming to the finite element method for linear static analysis . in the view of ooad ( object - oriented analysis and design ) method , a set of basic classes for the fem system are founded and their relationship is discussed too . all these fem classes are implemented in c + + language because the hybrid language c + + is an object - oriented extension of c . ( this language includes all the feature of c and is well suited to solve numerical problems because of its efficiency . )
本文在静态线性有限元系统中引入了面向对象的程序设计方法，介绍了面向对象方法的基本概念及特征，并通过有限元的面向对象分析和设计，确定了一套基本的有限元对象类及有限元的面向对象模型，本文设计的所有类均采用c + +编程语言进行了实现，最终形成了一套fem类库，它们以动态连接库的形式存在。 - Important missing aspects are : turbulent flow , numerical discretization techniques specially the relevant and difficult topic of numerical treatment of advection and related numerical methods of solution , variable property fluids , boundary layers , stability , etc . rather , it focuses on more primitive and fundamental issues of numerical treatment of advective equation and proper formulation of initial boundary value ( ib vp ) . numerical problems associated with advective dominated transport include spurious oscillation , numerical dispersion , peak clipping , and grid oriention . however , the key of numerical solution of three - dimensional advective problem is searching for a high - precision interpolating function , which can keep the computational stability and low damping
3 、针对三维纯对流方程提出了实用的拟协调单元模式，并与线性插值模式和协调单元模式比较后表明，在物理量大梯度变化的情况下，线性插值模式会产生较大的数值阻尼，导致解的失真；协调单元模式具有极高的计算精度和良好的计算稳定性，还可较好地克服数值阻尼，但由于计及物理量的二阶导数项，计算工作量大，边界条件给定尚存在一定的困难；而拟协调单元模式不仅具有协调单元模式计算精度高的优点，还避免了物理量的二阶导数项，可大大地减少计算工作量。