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The diffusion structure tensor in the diffusion coefficient function is a vector-valued structure tensor, which integrates the intensity and structure information of each channel, as well as the correlation among channels.

扩散滤波器中的扩散系数定义为关于彩色结构张量的函数,以使图像演化能够综合各通道信息,解决了各通道所得位移场不一致而引起的色彩混迭问题。

First it introduces the theory and method of information spreading estimation.

首先介绍信息扩散估计的理论和方法,然后对受到粗差污染的大坝观测数据,应用信息扩散估计方法进行线性模型的参数估计。

Thermal diffusion coefficient ; longitudinal dispersion ; transverse diffusion ; thermal pollution.

扩散系数;纵向分散;横向扩散;热污染

ZHOU Zhangjian(Laboratory of Special Ceramics and Powder Metallurgy, USTBeijing, Beijing, 100083, China)Abstract:On the basis of analysisof developing background and theory of thermoelectric graded materials, p-type (Bi1-0.85Sb0.85)2Te3and PbTe two segments thermoelectrical graded materials with different barriers werefabricated by conventional hot-pressing process.

具有不同扩散势垒的p型(Bi1-0.85Sb0.85)2Te3和PbTe二元梯度热电材料的研制徐桂英葛昌纯高艳平周张健摘要:在分析了热电材料的发展背景和研究理论的基础上,采用热压法制备出单体和双层具有不同扩散势垒的(Bi1-0.85Sb0.85)2Te3与PbTe体系二元梯度热电材料。

A method using a tiny thermistor as heat transfer model was developed to measure thermophysical properties (thermal conductivity and thermal diffusivity) of three standand samples(ethanol, ethylene alcohol, solution of calcium chloride). Results showed that there was no significant difference between measurement and recommendation; results of thermal conductivity from thermistor method and heat probe method for carrot and potato samples showed no significant difference; results of thermal diffusivity between thermistor method and calculation for carrot and potato samples showed no significant difference.

在分析微珠状热敏电阻传热模型的基础上,在室温对标准样品(乙二醇、乙醇、氯化钙的水溶液)的热物性进行测定,结果显示,导热系数及热扩散系数的测量值与推荐值之间无显著性差异(p>0.05);热敏电阻法与热探针法对比测定胡萝卜及马铃薯两种农产品的导热系数,结果显示两种方法之间无显著性差异(p>0.05);热敏电阻法与常规计算对比测定胡萝卜及马铃薯两种农产品的热扩散系数,结果显示两种方法之间无显著性差异(p>0.05)。

This paper proposed a Bayesian framework based algorithm which used the total variation model to describe the original image.

本文在贝叶斯框架下,基于总变分模型,建立原始图像和点扩散函数的先验模型,同步估计原始图像和点扩散函数。

Diffusing film, which is an optically transmissive component, is provided to redistribute the propagating light.

扩散片是个光穿透的元件,凡是能重新分配光分布的膜片都可定义为扩散片。

TEM field is slowly changing in middle to deep depth prospecting, which is characterized by unperceivable wave and dominant dissemination, thus it can be assumed to be quasi-static state approximate and the wave equation of electromagnetic wave radiation is retrogressive and replaced by diffusion equation.

在中、深层勘探情况下,TEM场是缓变的,其波动性已经很不明显,扩散特征起支配作用,波动方程退化成了扩散方程。

The results show that in a predator-prey model, when diffusion is absent, the diffusion is the interior impetus of system for its stable equilibrium state transforming to unstable equilibrium state and is the basis for biological mode forming.

研究结果表明:在捕食-食饵模型中,扩散是使无扩散时稳定的平衡态向不稳定的平衡态转变的系统内动力,是生物模式形成的基础。

For convection-dominated diffusion problems, because the diffusive coefficient is very small, it is expected that the new upwind schemes in this section can get very high computational accuracy.

对于对流占优扩散问题,由于扩散系数比较小,可以期望,本节所给的新型迎风格式能够达到比较高的计算精度。

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