数值方法

However, a numerical value is necessary so various techniques are used to obtain a quantitative value.

然而这个特性的数值是必要性的，因此要用多种技术及方法来获取这一项数值。

With Hilbert space filling curve and latent semantic index, MLSQ maps similar data objects in high dimension semantic space into an adjacent range in one dimensional value space, and considers every data object sequence number in one dimensional space as a key. MLSQ distributes the keys to adjacent nodes of structured P2P systems. By embedding the process of searching data points of HSFC into the nodes of structured P2P networks and using the data search mechanism of networks, MLSQ can facilitate to search the data objects in accordance with query requirements.

该方法利用Hilbert空间填充曲线和潜在语义索引，将高维语义空间中相似的数据对象映射到一维数值空间中的邻近区域中，并以每个数据对象在一维数值空间中的序号作为键，将数据对象的索引分布到有组织P2P网络邻近的结点上，通过将HSFC中数据点的查找过程嵌入到有组织P2P网络的结点上，再利用网络的数据查找机制，MLSQ可方便地搜索到符合查询要求的数据对象。

The result of the second order approximation given for me first time in the present paper leads to a theoretical m...

这种修正可以提高数值解的精度，有助于对问题获得更全面的了解，对进一步发展与完善高超音速钝头体绕流问题的数值求解方法起一定的作用。

Afterwards, the solving problem of Parabolic Type is transformed into a initial value problem of ordinary differential equation with respect to through Fourier transform again.

在数值实验中，对六个美式看跌期权价格进行了计算，通过分析比较，结果表明：快速傅里叶变换法加欧拉法是一种快速的高精度的数值计算方法。

The gamma function calculation of Pearson type III distribution is investigated,a new approximation method by using cone curve is put forward,and neither numerical integral nor series expansion may be used.

对皮尔逊Ⅲ型分布公式中伽玛函数的计算问题进行了研究，提出了一种新的数值逼近方法，在一定范围内对伽玛函数用圆锥曲线表示，利用递推公式扩大参数范围，免去了数值积分和用级数展开计算的麻烦。

The velocity distribution of jetting penetrator charge under different initiation ways was s tudied by theoretical analysis. The numerical simulation results coincide with the theoretical analysis, a practical method of numerical simulation and material model parameters were obtained.

并通过理论分析研究了不同起爆方式下所形成的杆式射流的速度分布，数值模拟结果与理论分析吻合较好，得到了一套实用的数值模拟方法及材料模型参数。

In the numerical computation, a two-dimensional numerical method integrating finite element method and difference method was employed, where the finite element method is used to calculate the magnetic field of the permanent magnetic guideway and the difference method is used to calculate the induced current in the superconductor, then the levitation force and the lateral force were calculated by Lorentz formula.

在数值计算部分，实现了一种集有限元法与差分法为一体的数值计算方法。

Such a chaotic attractor was obtained on the phase plane by numerical calculation.

运用数值计算的方法在相平面中得到系统的混沌吸引子，而后对这个混沌吸引子进行数值研究，发现它具有两方面的特征：①它是不连续边界象集的归宿；②具有分数维。

On the basis of Movable Cellular Automata,the 2D numerical simulation of tungsten alloy armour piercer piercing armour target is done.

用可移动元胞自动机数值模拟方法，对钨合金(93W)穿甲弹侵彻装甲钢靶板进行二维数值模拟。

Contact-impact model and its discrete schemes for revolute pairs with small clearances ;2. Based on the theory of contact dynamics,the dynamic model with clearances of sizing press roll was established using the method of numerical simulation.

基于接触动力学的理论，利用数值模拟的手段建立了调宽机含间隙的动力学数学模型，采用定步长四阶Runge-Kutta数值积分的方法，详细研究了运动副内间隙对接触力的影响规律。

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。