查询词典 coefficient of diffusion

The effect of solidgrain diffusion was reflected by f0. The core diffusion could be excluded by minishing theparticle scales, but the solid grain diffusion could not.

在常见幂函数形式的速率方程中引入修正系数f0体现了固体扩散对反应的影响，说明减小催化剂粒径，只能排除孔扩散的影响，并不能排除固体扩散对反应的影响。

The results show that, the chloride concentrations and diffusion coefficients are both a one-humped function of elevations (can also be the time scale of seawater infiltration), they increase with the increase of elevation until they get to the peak value, and then decrease with the increase of elevation; an evident relationship is being between the surface chloride concentrations and the wave forces acted on the concrete surface, while there is no much difference among the diffusion coefficients; the diffusion coefficients get to bigger as the depth from the concrete surface increase in the influence of the capillary structures evolution and chloride concentration, but this tendency of change was alleviated with the increase of depth.

研究结果表明：氯离子侵蚀混凝土设施的竖向分布规律为氯离子浓度、扩散系数与标高之间同为单峰函数分布，先随高程变大而变大，达到峰值后，随高程变大而减小；氯离子侵蚀混凝土设施的环向分布规律为混凝土构件表面氯离子浓度、氯离子通量与波浪力之间有明显的对应关系，波浪力越大，则表面氯离子浓度和氯离子通量越高，而扩散系数在各方位角差别不明显；由于混凝土长期服役过程中内部毛细孔隙结构演化以及氯离子浓度的影响，氯离子扩散系数随混凝土深度变大而变大，但这种变化趋势随深度逐渐趋缓。

The effects of electroplated Ni layer and electroless plated Ni-P layer on the diffusion behavior in Sn-Ag/Cu solder joint were studied. The results by EPMA analysis showed that the electroless plated Ni-P layer acted as a good diffusion barrier between Sn-Ag solder and Cu substrate. However, the electroplated Ni layer can not hinder the inter-diffusion and reaction between molten Sn-Ag solder and Cu substrate when reflowing, and there was a layer of IMC (Cu6Sn5) at interface of Sn-Ag/C u solder joint.

摘 要：研究了电镀Ni层和化学镀Ni-P合金层对Sn-Ag/Cu焊点扩散行为的影响，电子探针分析表明：化学镀Ni-P合金层能很好地阻止Sn-Ag/Cu焊点在焊接过程中的Cu，Sn互扩散和相互反应；而电镀Ni层则不能阻止Sn-Ag/Cu焊点在焊接过程中的Cu，Sn互扩散和相互反应，界面反应产物仍以Cu6Sn5为主。

The improved model possesses band-pass filer characteristic, diffuses processing stability and satisfies the max-min principle. The simulation results show that the median filter is only proper for outlies noise and removes the thin line and corners of image. The linear filter extends or blurs the boundary of image. The anisotropic diffusion removes random noise effectively, but it brings about illusive edge and back diffusion for outlies noise. The improved model that possesses both median filter characteristics and anisotropic diffusion capability is proper for various mixed noise and can sufficiently protect the detailed characteristic such as corner, thin line and edge.

研究结果表明：中值滤波作为一种经典的非线性滤波方法仅适合于&飞点&噪声的滤波并引起图像的角点、线条损失，线性滤波扩大或使图像边界范围模糊；传统的各向异性扩散能对随机噪声有效地压制，但对&飞点&噪声会产生虚假的边缘甚至反扩散，而改进模型既具有中值滤波的特性又具有传统各向异性扩散的性能，适合于平滑不同强度与形状的混合噪声，并对角点、线条、边缘等细节信息提供足够保护。

Firstly, the diffusion of oxygen atom from the SFCC to SHCP on Zr(0001) surface is calculated. The active energy for the diffusion is 0.77eV. Secondly, the diffusion of oxygen atom from the SFCC to Octa(2,3) via Octa(1,2) is calculated too. There are 2 energy barriers for oxygen atom to overcome, the active energies are 2.14eV and 2.57eV.

我们首先计算了氧原子从稳定的表面面心立方位置向表面六角密排位置的扩散，其扩散激活能为0.77eV；然后计算了氧原子从稳定的SFCC位置扩散到表面下第1层与第2层之间的八面体间隙Octa(1，2)位置，然后继续向表面下第2层与第3层之间的八面体间隙Octa(2，3)位置扩散，在此过程中氧原子需克服2个能垒，其激活能分别为2.14eV和2.57eV。

Scholars both here and abroad widely accept that diffusional environment is one of the most important factors to influence green-technology diffusion. To eliminate or conquer green technology diffusion obstacles so that to promote green-technology's rapid and broad diffusion, most researchers bring forward a series of suggestions of improve diffusional environment.

尽管国内外学者普遍认同扩散环境是影响绿色技术扩散的重要因素，为减轻或克服绿色技术扩散壁垒，达到促进绿色技术快速、大范围扩散的目标，许多研究人员提出一系列改善扩散环境的建议。

Traditional theory of chemical diffusion in solid states can not describe the relation of diffusion fluxes and diffusion-induced stresses because the research subject of the traditional theory is the diffusing atom or atomic flux, not the volume unit in the interdiffusion field.

传统固体化学扩散理论的研究对象是扩散的原子或原子流，并不关心互扩散区域内微观体积单元的变化，因此无法描述原子扩散流与应力之间的关系。

By synthesizing theories of systems engineering, science of talent, talent assessment, performance appraisal and bibliometrics, the author analyzes the qualification structure and performance structure of theachers in military academies and sets up a basic structure and concrete appraisal indicator system of qualifications of technical specialty for teachers in colleges. The author puts forward new appraisal indicators such as "lecuring hours coefficient","republication coefficient","thesis of core journals coefficient" and "citation coefficient". Comparatively complete quantification approaches are invented by the author for working performance of teaching, researching and social service of teachers. Based on this, the author establishes an integrated method to generate the appraisal results. By the application of stadardized processing on the appraisal results and synthetization of weighted indexes, the author solves the addibility and comparability problems of differentiated appraisal results by category or dimensiok, and realizes the amalgamation and comprehensive appraisal of inflexible appraisalresults and flexible appraisal results, and probes into the testification methods of validity, consistency and sensitivity analysis for the indicators system.

综合运用系统工程理论、人才学理论、人才素质测评理论、工作绩效评估理论、文献计量学等原理与方法，分析研究了军校教师的素质结构和绩效结构；建立了高校教师专业技术资格评审条件基本结构和具体评价指标体系，提出了"完成主讲课程课时系数"、"著作重版系数"、"核心期刊论文系数"、"论文被检索引用系数"等若干新的评价指标；提出了比较完整的教师的教学、科研、社会服务等工作业绩的量化方法；以此为基础，建立了评价结果的综合方法，通过对评价结果的标准化处理，运用指标加权综合法，解决了不同类别、不同量纲指标的评价结果的可加性和可比较性问题，实现了硬评价结果和软评价结果的融合和综合评价；探讨了指标体系有效性、一致性、灵敏度分析的检验方法。

The angular distribution of the bistaticscattering coefficient of HH polarization were obtained by numerical implementation. Influences of the permittivity and the mean layer thickness of intermediate medium, friction velocity and the frequency of the incident wave on the bistatic scattering coefficient were discussed. The basic characteristics, the zonal characteristics and the characteristics with varying of frequency of the scattering coefficient from stratified sea surface were obtained. The numerical results show that the scattering coefficient has approximate "quantization" characteristics.

通过数值计算得到了HH 极化双站散射系数随散射角的变化曲线，讨论了中间介质介电常数和厚度、摩擦风速和入射波频率对双站散射系数的影响，得到改进的一维分形分层海面散射系数的基本特征、分区特征和随频率变化的特征，结果表明散射系数近似具有"量子化"特征。

This study is to give a solution for the estimation of flash point for mixtures, the necessity for classification of flammable liquids. The traditional models for predicting flash point of mixtures usually by the activity coefficient approach. However, the parameters of activity coefficient were regressed from phase equilibrium data in the literatures. If there is no such parameter in literatures for the desired mixture, the model cannot predict the flash point oft hat mixture. Thus, this research aims at the improvement of deficiency of the flash point prediction models in the literatures by useing UNIFAC (Universal Quasi-chemical Functional Group Activity Coefficient) equation, Dortmund-UNIFAC equation and Lyngby-UNIFAC equation. In this study, we were aim at the prediction model for miscible mixtures.From the result, it is suggested to use different type of UNIFAC equation to estimast activivity coefficient in the predition of flash point for different mixture type.

易燃液体分类的主要依据参数为闪火点值，因此本研究目的为解决易燃液体中混合物分类时所面临到的闪火点值缺乏的问题，而在过去文献中所提出的闪火点预测模式会使用到活性系数，但这些模式使用到的活性系数均需要相平衡的数据以回归其所需参数，若所欲估算闪火点的混合溶液文献上未有相关参数，则无法有效利用闪火点预测模式估算其闪火点，因此针对文献中现有闪火点预测模式的缺点，利用描述液体混合物活性系数UNIFAC (Universal Quasi-chemical Functional Group Activity Coefficient)方程式、Dortmund-UNIFAC方程式和 Lyngby-UNIFAC方程式，建立发展一闪火点预测模式，而本研究以互溶溶液为对象。

The production moved off-Broadway to New York City, where she won the Joseph E. Calloway award for her performance, and was profiled in American Theater Magazine as one of ten young theater artists to watch.

生产提出过百老汇的新的纽约市，在那里她赢得了约瑟夫calloway奖，她的表现，并于异型在美国的战区杂志之一， 10战区的青年艺术家观赏。

It's a risk tradeoff, and I believe that adding test support code usually wins.

这是一个风险的权衡，我相信添加测试代码通常会占上风。