查询词典 numerical calculation

Numerical calculation of laser-induced collisional energy transfer in Eu-Sr.

激光感生碰撞能量转移的四能级理论模型。

In this paper,by numerical calculation, the effect of gas saturation on dispersion of model waves,excited spectrum of compressional wave and shear wave and full wave of acoustic logs in cased boreholl are discussed.

通过数值计算讨论了气体饱和度对声测井曲线的模式波的频散特性、纵波和横波的激发特性、全波波形的影响。

In this paper, taking one 1900t/h supercritical pressure once—through boiler installed in East boiler company as subject investigated, analyzing the structure and characteristic of unit, from the mechanism of units, based on the law of quality conservation, energy conservation and momentum conservation, having Lagrange fluid particle tracing idea in hydrodynamics field application in analyzing of unit operational characteristic, author build up the nonlinear distributed parameter general dynamic mathematical model of single-phase heating surface or diphase heating surface in the steam-water system for supercritical pressure once—through boiler, which is suitable numerical calculation and simulation for large scale disturbance and full working conditions change, and enough materializing distributed characteristic of thermodynamic parameter in process and time lag characteristic of energy transportation in tache. The transient responses curve of the system main variables under several disturbance are computed by Computer Simulation for the model, and theoretical analysis shows that the simulation results are reasonable.

本文以东方锅炉集团公司的一台1900 t /h超临界压力直流锅炉为研究对象，在分析机组结构和特性的基础上，从机组的工作机理出发，以质量、能量、动量守恒定律为依据，将流体力学领域中的Lagrange流体质点追踪思想用于机组运行特性的分析上，建立了适用于超临界压力直流锅炉汽水系统单相、双相受热面的非线性分布参数通用动态数学模型，该模型适合于大扰动全工况变化的数值仿真计算，充分体现了过程热力参数的分布特性和环节中能量输送过程的时滞特性，并对模型通过计算机仿真得出各种扰动下系统主要变量的响应曲线，从理论上分析了仿真结果的合理性。

The invention discloses a construction method of biorthogonal wavelet, which is based on Bernstein base and comprises the following steps that:(1) a lowpass filter at a discomposing and reconstructing end is expressed by Bernstein base;(2) numerical calculation of the lowpass filter is carried out;(3) the lowpass filter at the discomposing and reconstructing end is led to meet the conditions to reconstruct the lowpass filter entirely;(4) the parameter of obtained biorthogonal wavelet is calculated.

本发明公开了一种基于Bernstein基的双正交小波构造方法，包括如下步骤：(1)将分解与重构端的低通滤波器用Bernstein基来表示；(2)进行低通滤波器的数值计算；(3)使分解与重构端的滤波器满足完全重构滤波器的条件；(4)计算获得双正交小波的参数。

Fluid field tests and numerical calculation have been carried out on an excellent shipform DO11 with an extrorse cochlea-channeled stern .

对长江优秀船型东方红11号(DO11)及其外旋蜗尾改型进行了计算，结果表明：DO11外蜗改型船桨盘面处的周向和径向合成伴流计算结果与流场测量结果定性一致。

The result shows that the numerical calculation based on strength reduction echnique can not only consider the geomorphy, geologic structure and reinforce measure but also the constitutive relationship of rock and the interaction between structure and slope.

研究表明，基于强度折减法的数值计算可以像数值模拟方法那样既考虑三维效应明显的地形地貌、地质结构和加固方式等，又考虑岩土体的本构关系和支挡结构与坡体的相互作用，还可以像极限平衡法那样计算安全系数，却不用指定滑面。

An investigation on the local heat transfer coefficient of a helically segmented finned tube surface in a tube bundle was conducted by experiment in cooperation with numerical calculation.

对齿型螺旋肋片管管束内部沿管表面周向的局部放热系数进行了研究。

The influence of various structure dimensions on the dispersion relation and the coupling impendence are discussed though numerical calculation.

分析表明只要减小慢波结构的周期和梳高，可以使慢波结构结构工作到更高的频段。

In the process of the evaluation we got the mathematical relation between correlative parameter β, Interceptive parameter δ, and the factor M~2, using coherent beam passing diaphragm, with a numerical calculation and diagram by MATLAB.

在估算与评价过程中，利用了部分相干光通过硬边光阑的理论模型估算M~2因子，得出了光束的相干参量β和光束截断参量δ与M~2因子的具体关系式，并利用MATLAB对其进行数值计算，最后图示出它们之间的关系。

ABSTRACT In this dissertation, three-dimensional (3D) numerical calculation of flow field through a torque converter is carried out with inviscid flow model and viscous flow model.

本文从流体无粘流动和有粘流动两种模型出发，较系统的研究了液力变矩器流场的三维数值计算。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。