查询词典 evolution equation

According to the nonlinear oscillation theory and the obtained equation, the nonlinear characteristics and evolution law of Kunming precipitation anomaly system were studied.

根据非线性振荡理论和昆明地区的非线性振荡方程研究了昆明地区降水距平率系统演变的非线性特征及其演变规律。

Based on modern optimization theory and optimal control theory, this dissertation studies some questions as follows:1. The optimization model of parameter identification of three-dimensional geologic history numerical simulation, algorithm and its applicationGeologic history numerical simulation is a basic content of basin numerical simulation, and the porosity is the major parameter in the evolution and development process of oil-bearing basin. According to the sedimentation and burial mechanism, the physical and chemical principles of oil geology, the mudstone porositys non-linear parabolic partial differential equation has been established.

本文应用现代最优化及最优控制理论，对如下一些问题进行了研究： 1、三维地史数值模拟的参数辨识优化模型、算法及应用地史模拟是盆地数值模拟的一个基础性的研究内容，地层孔隙度是含油气盆地地史演化发育过程中的重要参数，根据地层沉积埋藏机理和石油地质的物理化学原理，通过引入数学物理方程概念，建立了泥岩三维孔隙度场方程，根据问题的特点，给出了方程的定解条件，对方程的动边界也给出了处理方法，并且证明了解的存在性与惟一性，在此基础上建立了以当今实测数据为拟合准则的三维地史数值模拟的参数辨识优化模型，这是一个含有二阶偏微分方程约束的泛函极值问题。

The Adaptive Genetic Alg orithm is introduced on the basis of the course of genetic evolution. The method is applied to work out the Riccati Equation.

在分析遗传进化过程的基础上，提出了一种自适应遗传算法，应用于求解黎卡提方程。

The solution of the diffusion equation can be used to simulate the evolution of some kinds of scarp slopes.

：扩散方程可以用来模拟某些坡地演化形态。

Moreover,the stochastic differential equation of seepage boundary is proposed and the mechanism of seepage evolution is analyzed.

建立了渗流边界的随机微分方程，揭示了渗流边界形貌的演化机理。

The stochastic differential equation is not only the traditional but also the popular way to describe the uncertainty of the evolution of the stock price.

利用随机微分方程来描述股票价格变动的不确定性是一种传统的方法，也是现在比较流行的一种方法。

As a result of the evolution of AP equation, parton distribution at small x will lead to the violation of the unitarity of S-matrix.

但AP方程没有包括此效应，因而根据AP方程演化得到的部分子分布在小x区域会导致散射截面幺正性的破坏。

The Schroedinger Equation with unitary evolution equations is a matrix differential equations, so Wei-Norman decomposition can be used for solving the multi-level quantum systems.

Wei-Norman分解对于分析矩阵微分方程的解是比较成熟的理论，含有幺正演化矩阵的薛定谔方程是矩阵微分方程，所以可以利用Wei-Norman分解来分析求出多能级量子系统的解。

Firstly, the integral-differential equation described the radiation field evolution is derived, and then the instability of its solution is also investigated analytically. By using the perturbation and iteration method, the threshold detuning and threshold linear growth rate of the unstable solution are analyzed and discussed in detail.

首先，建立了一个描述辐射场演化的积分一微分方程，解析分析了系统解的不稳定性，并采用线性方程解的微扰迭代方法进一步对系统不稳定解出现的失谐量阈值和线性增长率阈值等作了详细讨论。

The evolution of a packet is described by the nonlinear Schrodinger equation, and then the stability of the so-called Stokes wave train is discussed.

dinger方程所描述，然后讨论了所谓的"Stokes波"的稳定性。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。