查询词典 numerical analysis

With the development of the technology of numerical control, the open system of numerical control has become an important develop direction.

随着数控技术的发展，开放式数控系统已成为一个重要的发展方向。

The main results can beexpressed as follows:(1)Based on πtheory, some affected factors about wave forces are given, and therelation between affected factors and wave forces is analysised by experimentalresults.(2) The distribution of wave press at representative time and reflection nature aregiven and their variety charactes are discussed by experimental results.(3)By comparing the wave forces of quarter-circular breakwater and semi-circularbreakwater under the same wave conditions,some approximately wave forcesexpressions of quarter-circular breakwater are given.(4)Based on VOF method to trace water free surface,solve numerical value ofRANS equation,and get the distributions of flow field and wave press ofquarter-circular breakwater at the same time during one period,the mechanism ofwave force is also discussed elementarily.(5) Based on the result that RANS equation of numerical simulation agree wellwith experimental results,a new approach to study hydraulic natures of quarter-circular breakwater is provided.

其主要结论如下：一、通过π定理，确定影响波浪力的无因次参变量，根据试验结果对其影响因素进行分析；二、基于模型试验，给出典型时刻圆弧面防波堤的同步波压分布和反射特性，讨论它们的变化特点；三、通过相同条件下圆弧面防波堤与半圆型防波堤两种堤型试验波浪力的比较，给出了圆弧面防波堤波浪力的近似方法；四、利用VOF法追踪自由水面，数值求解RANS方程，得到圆弧堤堤体周围的流场和压力场，初步分析了速度涡流与压力场的相互影响；五、对比数值分析与试验结果，探讨数值方法研究圆弧面防波堤水力特性的可行性，提供新的研究途径

At the same time calculation of numerical value is a necessary link solving the linear system of equations, which is a very important question in calculation of numerical value.

数值计算是科学计算中的一个必不可少的环节，而在数值计算中，一类很重要的问题就是线性方程组的求解。

Computers need numerical value change between binary system,octal system and decimal system The fortran77 is used in the programming to perform the numerical value converting.

计算机需要数制转换，计算机内部使用二进制，二进制八进制十进制之间的数制转换，FORTRAN77编制，围绕二进制与小数，解决二进制八进制十进制之间的数制转换 2。

Computers need numerical value change between binary system ,octal system and decimal system The fortran77 is used in the programming to perform the numerical value converting.

计算机需要数制转换，计算机内部使用二进制，二进制八进制十进制之间的数制转换，FORTRAN77编制，围绕二进制与小数，完成二进制八进制十进制之间的数制转换

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。

Key words: numerical control machine tool; numerical control machining; opposite clearance; vector operation; precompensation

关键 词：数字控制机床；数控加工；反向间隙；向量运算；预补偿

In this paper, non-extreme points of numerical range, n-numerical range and orthogonal projection pair are discussed, the main content as follows:First, in Chapter One we give the signs, definitions and elementary theorems used by this article.

本文就数值域的非端点，n次数值域和正交投影对等问题进行了研究，主要内容如下：第一章作为本文的预备知识，我们介绍了该文中所用的符号，概念和基本定理。

Results: The proportional volume, numerical density of the granules in ovariotomy group were less than those in sham-ovariotomy and ovariotomy estradiol groups (P.001); the proportional volume and numerical density of ASG in myocardial cells almost came back to the normal level with small dose estradiol; along with the enhancement of estradiol dosage, the content of ASG in myocardial cells was more than those in sham-ovariotomy and small dose estradiol group (P.01), and showed a quantity-efficiency relation.

结果：切除大鼠双侧卵巢后，心房特殊颗粒的体密度和数密度与对照组及用雌二醇组比较明显减少(P＜0.01)，小剂量雌二醇可使大鼠心肌细胞心房特殊颗粒的体密度和数密度恢复到正常水平，随剂量增加，心肌细胞心房特殊颗粒的量也伴随增加，呈量效关系。

Up to now, finite difference method, finite element method and boundary element method are common numerical methods to obtain numerical solutions of parabolic partial differential equation.

目前求解抛物型偏微分方程的数值方法有有限差分法、有限元法和边界元法等。

In contrast to the ubiquitous rising-sun-with-rays military flag of the Japanese, Chinese banners and ensigns feature a range of designs.

与遍地都是的太阳军旗不同，中国人的旗帜和徽章设计得各式各样。

From their small corner of Feng's Guangzhou headquarters -- a jumble of pink leashes, squeezable rubber steaks, and plastic doggy Santas for Fido's stocking -- Soleil's designers come up with at least five new products a month.

从Feng 设在广州总部的产品展示柜台上可以看到，Soleil的设计师每月至少设计出5件新产品。