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。

After inlet model s three dimensional structural grid was generated, proper numerical scheme and onflow model were choosed, then numerical computation on flow field of inlet was taken, finally the better results were got.

通过建立三维结构化网格模型，选择合适的数值格式与湍流模型，对进气道流场进行数值模拟，得到了合理的结果。

The value of 0 means the image is to be displayed fully transparent, and 1 fully opaque.

数值0意味着这张图片是完全透明的，数值1则表示完全不透明。

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。

Based on this, a new WENO difference scheme which based on Dispersion-Relation-Preserving relation is developed, and representative test cases with this scheme for computational aeroacoustics problems has been implemented and compared in order to test capability of wave capturing; In addition, WENO schemes generally do not converge at high order in the presence of contact discontinuity of Euler equations, so a conservative front tracking technique coupling WENO schemes and Level Set method to simulate the translating density profile is presented here, and numerical simulation with this technique for representative test case has been implemented and results show the desired accuracy.

本文研究了高阶精度加权基本无振荡格式及其在双曲守恒律方程中的应用，在此基础上作了两个方面的工作：一是针对高频声波问题构造出一种基于保色散关系的WENO有限差分格式，并对计算气动声学问题的代表性算例进行了大量数值实验，比较了该格式捕捉波数的能力；另外，针对高阶WENO格式在处理Euler方程的接触间断时精度有所降低的问题，研究了利用界面追踪技术Level Set方法和高阶激波捕捉WENO格式相结合的一种守恒追踪方法，并且给出有代表性的密度滑移面问题的算例，得到一致高阶精度的数值模拟结果。

To improve the order of convergence for the modified Douglas scheme,Richardson extrapolation is also presented.

另外每一章均给出数值例子显示所采用数值方法的可行性。

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。

But using object oriented programming to study Finite Element is a new method to design and construct Finite Element.

本文从计算机科学的角度出发，将电磁场数值分析方法与软件科学相结合，研究了面向对象有限元方法的原理，设计了电磁场数值分析可视化软件系统。

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。

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。