查询词典 difference equation

The result shows the fitting results according to the Fulcher equation and Williams equation are almost the same, and the parameters of the both have intrinsical relationship.

结果表明采用Fulcher方程和Williams方程都可以得到很好的拟合结果，并且两者参数之间存在一定的内部联系。

Being enlighten from the Schwartz KP equation,we give out a(3+1)dimensional conformal invariant equation that possessesPainlevéproperty.

我们利用已知的(2+1)维Kadomtsev-Petviashvilli方程的Schwartz形式，构造了一个具有共形不变性的Painlevé可积的(3+1)维的模型。

Based on the new method, the paper discusses an inverse mapping of rational parameter surface, also, the implicit equation of the parametric equation is obtained.

文中用该方法对基于有理参数曲面的逆映射进行了一些探讨，并得到参数曲面的隐式方程。

Aiming at speed of the program and capacity of hidden information in traditional algorithms as equation reordering, this paper proposed a new algorithm based on inverse number of equation's operand coefficient.

针对方程式重排序等算法存在的程序运行速度、信息隐藏量等问题，提出基于方程式操作数系数排列逆序数的软件水印算法。

The digital signal method is a discrete deconvolution technology.It uses the shape-factor to create the forward equation of subdivision interpretation,and the discrete signal anti-filtering technology to get the inversion equation and the general formula for numerical solution of quantitative radionuclide content.

本文提出的数字信号法是一种离散反褶积法，它采用形态系数创建分层解释正演方程，利用离散信号反滤波技术求得反演方程及定量核素含量的数值解通式。

It leads to one simple equation, which, in the isotropic case, is the bipotential equation

因为它可以推出一个简单的方程，在各向同性的情况下，这个简单方程是一个双位势方程。

The simulation results by applying zero-equation model are compared with those by adopting Prandtl mixing length theory and K-ε two equation model.

研究表明，总体来说Prandtl的混合长度理论能够获得比Chen的零方程模型更好的结果；从这两种零方程模型的构造分析，Prandtl混合长度理论较为合理，但Chen的零方程模型更容易收敛。

In this paper,the branch pipe network as a virtual ring pipe network is proposed,and the equation for it has been set up.It is proved that Kirchhoff law of ring pipe network is a kind of special form of equation,which is the virtual ring pipe network.

本文中提出将树枝管网视为虚环，建立了虚环方程，证明了环形管网的基尔霍夫定律是虚环方程的一种特殊形式，环形管网方程和虚环方程互相兼容，可联立求解。

Based on the Lagrangian equation with dissipation function, the motion equation of a microbubble with shell is obtained, and the dynamic characteristics of microbubble with shell in free space are studied. It shows that the inner and outer maximum radii of the microbubble increase when the acoustic pressure and its initial radius increase, as well as when the ultrasonic frequency decreases.

理论上利用有耗散函数的Lagrange方程，建立了有壳微泡的R运动方程，开展了自由空间中有壳微泡动力学特性的研究，表明微泡内外半径增量随声压的增大、超声频率的降低、初始内径的增大及壳厚的减薄而迅速增大。

The dynamical equation of the system was established using Lagrangian equation and Newton's second law.

通过系统运动的拉格朗日方程和牛顿第二定律，建立了机械式离心调速器系统的动力学方程。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。