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Based on the point that directed diffusion equation is a diffusion process with direction, the correlation between directed diffusion and wavelet transform is studied in this paper.

摘要方向扩散方程是一种有方向性的扩散,本文基于这一特点,对方向扩散方程与小波分解和重构的相关性作了研究。

In city , because the occupied area of the urban sewage pumping station is usually limited , the length of the forebay is inclined to be short and the diffusion angle in flow direction is big accordingly , which causes bad flow pattern, such as backflows ,vortices, etc.

城市排污泵站由于条件的限制,前池一般面积较小,扩散角较大,扩散段较短,因此水流进入前池后突然扩散,流态紊乱,易行成回流、漩涡等不良水流流态,从而影响水泵的工作性能。

In Chapter 4, the related mathematical knowledge, methods and principles are presented which include mathematical morphology, Fourier transform and discrete cosine transform, illposed problem and corresponding regularization methods, basic iteration methods and preconditioning technologies.

回顾并比较了传统线性和非线性滤波方法,详细综述了从变分到PDE在图像滤噪与模糊恢复上的应用和发展,模型基本形式为无约束极小化问题:〓(1)惩罚算子L扩散形式为〓(2)Κ为扩散项,是调整扩散程度的关键因子。

Diffusive fluxes are roughly symmetric around the magnetic equator during equanoxes. But they are asymmetric during solstices, the winter hemisphere has smaller fluxes than the summer hemisphere does.

在分点,南北半球的扩散通量和扩散速度大致对称;而在至点,扩散通量存在着明显的南北半球不对称现象。

For intramolecular electron transfer reactions in solution,the fluctuations of the intramolecular vibrational modes are much faster than that of solvent mode.Thus,the reaction-diffusion equation is commonly used to describe the motion of solvent,with a sink function to treat the vibrational high-frequency mode.Based on this theory-so -called the Sumi-Marcus theory,we proposed an imaginary-time split operator approach to solve the reaction-diffusion equation.The approach is applied to evaluate the intermolecular ET rate between oxazine 1 and N,N-dimethlaniline.By measuring the two average survival times of the donor state probability and the rate constant in long time limit,the full kinetics of the ET is revealed with a variety of sink functions.

对于扩散控制的溶液中的电子转移反应,分子内振动模的运动比溶剂运动快很多,Sumi-Marcus理论提出用反应扩散方程(reaction-diffusion equation)处理溶剂的扩散运动,而分子内的振动用sink函数来表示,我们基于此理论发展了用虚时间分裂算符的方法(imaginary-time Split operator approach)解反应扩散方程,并将其应用于嗪1(oxazine 1,OX1)和N,N-二甲基苯胺分子之间的电子转移反应,Sink函数采用几种不同的微扰表达式,通过计算得到给体几率衰减的两种平均速率和长时间极限下的速率常数,揭示了该体系电子转移过程中的一些动力学性质。

And the article discussed the pare diffusion and pure infiltration of ions and complex ions with linear isotherms, combined with diffusion and infiltration, as well as pure diffusion with non-l...

并讨论了铜厂铜矿床形成过程中离子、络离子具线性等温线的纯扩散、纯渗滤和扩散与渗滤重叠情况,以及非线性等温线的纯扩散作用。

Comparatively, Na^+ has a wider diffusion range and higher self-diffusion coefficient than Mg^2+.

在Na/Mg^-蒙脱石中,Na^+和Mg^2+的扩散方式不同,Na^+的扩散范围相对更广,自扩散系数更大。

Horizontal diffusion was used to control small-scale noise that results from numerical dispersion, nonlinear instability, and discontinuous physical processing, etc. by adding a linear forth-order monotonic horizontal diffusion with orographic flux limiting to the prediction equation.

水平扩散方案是将一个通量受地形限制的线性四阶单调水平扩散项加到预报方程,去控制由数值扩散、非线性不稳定及不连续物理过程等引起的小尺度噪音。

Besides, the polycentric regional density function is used to analyze the population growth ...

而且,不同层次的中心城市表现出不同的人口集聚与扩散模式,即去中心化扩散、中心增长型扩散和向心集聚。

New and high technology diffuses a the model is system of diffusion theory of new and high technology main component, it is qualitative diffuse of the analysis deepen and develop.

高新技术扩散模型是高新技术扩散理论体系的一个重要组成部分,是定性扩散分析的深化和发展。

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推荐网络例句

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。