数值的

But this case is a common problem that often meets in samples of reprocessing.In this dissertation, an indirect fluorescence analysis method to analyze trace neptunium is discussed.

本文利用DTPA-Tb与DTPA-Np稳定性的显著差异，DTPA-Tb的络合常数的对数值是22.71，而DTPA-Np的络合常数的对数值为29.8，由Np~(4+)置换出DTPA-Tb中的Tb~(3+)。

The above presented methods are applied to solve the 2D harmonic equation. Numerical examples show satisfactory results.

对上述提出的方法，本文以二维调和方程的不同边值问题为例，推导出相应的计算公式，并在随后给出相应的数值算例，数值实验的结果是令人满意的。

In study on structure damage identification in time domain,error of numerical integral will affect directly accuracy of parameters resulted from reversion.

在结构损伤识别的时域法研究中，数值积分的误差将直接影响反演参数结果的精度。积分初值的未知、消除数值积分引入的误差是结构损伤反演计算中信号处理的难题。

Especially coupling mathematics model and numerical simulation method.

从机理、实验和数值模拟方面，综述了近年来国内外土壤中有机污染物迁移转化过程的最新进展，重点介绍了处理耦合数学模型的的数值模拟方法，并结合土壤污染发展的特点，对今后有机污染的研究方向作了一般性探讨，提出了需要进一步解决的关键性问题。

However, the multi-time values before the initial time are required in solving the ordinary differential equation with linear multi-step method, the values at these time levels are still computed from the given initial value by one of above mentioned schemes.

在常微分方程的线性多步法中用到初始时次前若干时次的数值，但这些时次上的起动值仍然由初值运用方程计算得到的。这就是说，人们在预报问题中始终恪守只用一个初值的原则。在天气预报中，数值积分只用到一个起报场，即最后一个时次的观测场。

A calculation model is established for the corrugation and annular flow field of a stratification injection allocator by using 3D Max and it is put into VR environment of PHOENICS and based on the actual geometric size of the allocator,κ-ε turbulent calculating model is used for numerical calculation of water medium flow field by using orthogonal and detail grid under coordinate system.

用3D Max建立了分层配注器波纹环空流场的计算模型，调入PHOENICS的VR编辑环境中，根据实际配注器的几何尺寸，在柱坐标系下，采用局部加密正交网格，应用k-ε湍流计算模型对水介质流场进行了数值计算，给出流场的速度分布与压力分布曲线，并对比分析了3种形状的波纹环空流场的数值计算结果。

The numerical techniques developed here, including the high accuracy method of using expansions in orthogonal functions in normal direction and the effective algebraic mapping to deal with the problem of infinite region, can raise the calculation precision and the convergence velocity greatly.

文中所发展的方法，如，在法向上采用高精度的高阶谱方法和对无限区域数值问题的更为有效的代数变换处理等，提高了计算精度和收敛速度；同时，通过预估校正迭代法，使抛物化稳定性方程中重要的正规化条件得到满足，保证了数值计算的稳定。

On the basis of the results of survey and study about researches of pulse well test at home and abroad, the method of total pressure history match and numeric solution is selected as an advanced research, the goal is to investigate a method of pulse well test in theory and analysis under the conditions of no knowledging about the changing tendency of formation pressure and having outer boundary.

根据对国内外关于脉冲试井研究情况的调研结果，本文选择全压力史拟合方法和数值求解方法作为一个探索性研究课题，将有限元法应用于压力的数值求解过程，目的是探索一种在地层压力变化趋势不清楚和有外边界的条件下的脉冲试井理论和分析方法，从而为油田提供结果更准确的、信息更丰富的开发调整依据资料。

In Chapter 7, we present some numerical results of our method for image reconstruction problems. Results of two singular problems related to the Poisson equation are also given.

第七章，主要是给出我们的算法在图象重构中的具体应用的数值结果，同时还给出了两个有关Poisson方程的奇异问题的数值结果。

In the computational methods of TPBVP, in order to reduce some difficulties involved in solving a TPBVP via adjoint variables, we discuss a direct method in which state and control variables are indirectly parameterized, The method employs a recently developed direct optimization technique that uses a piecewise polynomial representation for the state and control variables, thus converting the optimal control problem into a nonlinear programming problem, which can be solved numerically.

在数值解法中，为了减少解决两点边值问题共轭变量带来的困难，主要讨论了将状态变量和控制变量进行参数化的一种直接方法，这种方法采用了近段发展起来的使用分段的多项式来代替状态和控制变量的直接优化方法，然后最优控制问题就转化成可以用数值方法解决的非线性规划问题，使得迭代初值更加容易选取。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。