查询词典 evolution equation

Based on the smoothed particle hydrodynamics model, we first establish a new pressure equation of state instead of traditional ideal gas equation of state.

基于平滑粒子流体动力学模型，首先提出一种压力状态方程以取代传统的理想气体状态方程，从而在保证系统稳定性的同时，最大程度地保证液体的体积守恒；为了实现对水面浪花飞溅和泡沫的模拟，提出自适应的表面张力模型，通过制定3类流体粒子状态的转化规则，实现了飞溅粒子和主水体之间的无缝连接；并采用GPU图形硬件加速技术大大地提高了整个过程计算效率。

Mechanism of frosting formation for airside heat exchanger is analyzed, the existing problems in the formula of frost density change being used now are pointed out, and the accurate formula of it is firstly concluded from the ideal gas state equation and Clapeyron-Clausius equation.

分析了空气源热泵冷热水机组空气侧换热器结霜的机理，笔者指出了目前计算用于霜密度变化的结霜量变化率公式中存在的问题，提出了根据理想气体状态方程和Clapeyron-Clausius方程推导出的计算用于霜密度变化的结霜量变化率的公式。

Besides the previous research finding, the ideal gas equation and ideal gas, fluid dynamics and thermal dynamics were also included in the derivation of the equation of state of the detonation Wave.

目前国内可量测爆震波速度的仪器并不普遍，因此爆震波速度值得之不易，想利用爆震波速度来探讨爆破震动的特性更是难上加难，本文将依据理想气体方程式、流体动力学、热力学、理想气体多变定律和相关的经验公式，结合冲击波和爆震波传递时质量、能量和动量守恒的理论，推导爆震波的状态方程式，并藉由爆震波的状态方程式了解爆震波的特性及其应用。

The transcendental characteristic equation is converted into a polynomial equation at the imaginary axis without any substitutions.

针对具有单输入反馈控制的单时滞电力系统，提出了一种求解时滞稳定裕度的简便方法。

The transcendental characteristic equation is converted into a polynomial equation at the imaginary axis without any substitutions. This method needs less computation than the CTCR method.

该方法将含有指数项的特征方程在虚轴上转化为多项式方程进行研究，无需任何中间变量代换，处理方法简单，计算量小。

Finite element discretization was carried out on the mathematical model to get a fully coupled finite element equation with the parameters of element nodal displacement and element nodal pore pressure as unknown variables. Finally, the transient nonlinear finite element equation in incremental form for reservoir fluid-solid coupling is obtained by means of time discretization in implicit difference scheme.

基于与微分方程等价的加权余量公式，在空间域采用有限元离散，对时间域进行隐式差分格式离散，导出了以单元节点位移和单元节点孔隙压力为未知量的储层流固耦合的非线性有限元增量方程。

A new graph theory methodology is presented for analysis of the unsteady flows in open channel network, including the structure and characteristics of the incidence matrix A, continuity equation and energy equation with matrix A.

提出了新的渠网非恒定流图论原理，包括适应渠网非恒定流特征的节支关联矩阵A的构建方法及性质分析，基于A的节点连续性矩阵方程和节点水深矩阵方程等。

FEM equation of fluid-solid coupled vibration was consisted by analyzing FEM equation of incompressible viscosity fluid and elastomer.

通过对弹性体振动的有限元方程和不可压缩粘性流体的有限元方程的分析，建立了弹性体与粘性流体流固耦合的有限元方程。

This paper consists of three parts:(1) application of Nano Indenter Ⅱ on new types of electronic encapsulation materials;(2) measurement of micro-scale plastic equation of state with Nano Indenter Ⅱ;(3) variation of micro-scale plastic equation of state after boiler tubes used over a long period of time.

论文有以下三部分内容：（1）纳米力学探针在发展新型电子封装材料中的应用；（2）用纳米力学探针压入法测定材料的微区塑性力学方程；（3）电厂锅炉管长期使用后微区塑性力学方程的变化。

The so-called indeterminate equation is the solution in the range of integers, positive integers, rational numbers or integers of the equation or algebraic equations, whose unknowns are usually more than the number of equations ...

所谓不定方程是指解的范围为整数、正整数、有理数或代数整数的方程或方程组，其未知数的个数通常多于方程的。。。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。