数值计算

Because we mainly involve visual fields of medical science , have placed more contents on the development in the field of medical image of visual technology and argumentation used. Second part It is the visual technology knowledge, the generalization in such respects as the basic principle , basic functions, function store and three-dimensional animation technology to OpenGL ,etc. The realization of the system using OpenGL functions finish that three-dimension demonstration. The third part It is number value that calculate knowledge, three-dimension rebuild technology is it is it is it punish to fit to go on to need, the research of interpolator technology that cant leave, So this part has quoted the Hermite function principle , define cubic Hermite function to begin, calculate the differential coefficient among them draws cubic spline again.

由于我们主要是涉及医学可视化领域，所以将更多的内容放在了可视化技术在医学影像领域的发展与应用的论述；第二部分是可视化技术方面的知识，主要对 OpenGL 的基本原理、基本功能、函数库及三维动画技术等方面的概括，在系统实现时就是通过调用 OpenGL 函数库实现三维显示的；第三部分是数值计算方面的知识，三维重建技术需要进行拟合处理，离不开插值技术的研究，所以这一部分从埃尔米特函数原理开始讨论，引入三次埃尔米特函数，进一步计算时又引用三次样条函数。

Along with the development of the computer industry, numerical calculation is widely used in the computation hydrodynamics.

随着计算机工业的飞速发展，数值计算方法在计算流体力学中得到了广泛的应用。

Based on fluid numerical results, a new parameter and its calculating method which are both strictly derived from basic equations of hydromechanics and thermodynamics are used to evaluate the mixing effect of viscous fluid.

从流体力学及热力学的基本方程出发，经严格推导给出了一种新的基于流场数值计算结果的评价粘性流体混合均化效果的参量及其计算方法。

Firstly, the fully discrete standard finite element Galerkin method and the nonlinear finite element Galerkin method and the modified finite element Galerkin method in which time is discretized by the Euler implicit difference scheme are considered, and the - and - global relative errors and CPU time corresponding to the SG method, the NG method and the MNG method are computed respectively.

首先，对于全离散(时间离散是欧拉显式格式)标准有限元Galerkin方法和非线性有限元Galerkin方法以及修正有限元非线性Galerkin方法，分别进行数值计算，并比较了三种算法的计算解与精确解的误差估计及所耗费的CPU时间，结果验证了MNG方法要优于NG方法，而NG方法又优于SG方法。

Numerical calculation of FEM and experimental investigations are used in the present research. The influence of loading condition and size of indenter on the tensile strength of rock has been investigated. The results obtained by numerical calculation and experiments show that tensile strength of rock will increase with the increase of indenter size.

通过有限元数值计算与理论分析相结合的方法，对不同载荷接触条件和接触面宽度角下的岩石抗拉强度进行了深入分析，结果表明，在圆弧形和平台加载条件下计算的岩石抗拉强度随载荷接触宽度角α的增大而增大。

It is fitted to the intelligence interface and numerical value calculation. Through topology form and topology analysis as well as the graphical knowledge and the general network system equipment state analysis the graphic knowledge can be translated into inferable knowledge.

通过对可视化的电力系统结构图进行拓扑形成、拓扑分析及系统设备状态分析完成图形知识到计算推理所用知识的转化，从而得到既适合数值计算又适合智能推理的通用网络模型。

In regard of the problems on semi plane, when the calculation of its numerical value proceeds, the calculation accuracy will come under influence if the effectiveness of the infinite far place on the nearby sites are not considered.

对于半平面问题，在进行数值计算时，如果不考虑无限远处对近场的影响，则计算精度会受到一定的影响。

The deformed metal-SWNTs and metal-TCNTs can be transformed to semiconductor or insulator due to deformations resulting to variation of the atomic structure and the nearest-atom transfer integral having relation with the directions.Based on the Boltzmann transport equation and n - electronic energy dispersion relations for individual SWNTs, the theoretical model caculating the current and conductance of the SWNTs is deduced. The low-temperature conductances of undoping or doping SWNTs are studied numerically, the calculated results show that, for the doping SWNTs, the conductance is quantized, i.e.

我们从Boltzmann方程出发，并结合SWNTs的能量色散关系，导出了计算手性SWNTs电导或电流的理论模型，并分别对非掺杂和掺杂SWNTs的低温电导或电流进行数值计算，结果表明：对于非掺杂的SWNTs，其电导是量子化的，即电导随偏压或电子输运能量变化呈跃变的台阶式结构，这些结构随管径增大或温度升高变得不明显；对于掺杂SWNTs，当偏压为某些特定值V_i时，传导电流有跃变，且传导电流的大小、跃变周期及跃变幅度等不是完全由掺杂后的电子浓度决定的，而与管半径R及掺杂后Fermi能级附近的电子态密度有直接关系，随着温度的升高和管径的增大，跃变结构趋于平滑。

In this paper,electric field in a vacuum interrupter is calculated and analyzed systematically and wholly with the method of numerical calculation.

本文采用数值计算的方法对真空灭弧室内的电场及影响其分布的一些因素进行了比较全面和系统的计算。

Because of the complexities of constructions in hospital neutron irradiator and the natural circulation, the advanced numerical method is used for the detailed study by the computational fluid dynamics program generally used in the world.

由于医院中子照射器内部结构的复杂性，以及采用自然循环的流动方式，本文采用了目前国际上通用的CFD计算程序，利用先进的数值计算方法对课题进行了细致的研究。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新