查询词典 diffusion

The self-diffusion coefficients of supercritical carbon dioxide and infinite dilute diffusion coefficients of methanol and ethanol in supercritical carbon dioxide were investigated by molecular dynamics simulation.

采用分子动力学模拟的方法对超临界二氧化碳的自扩散系数及甲醇和乙醇在超临界二氧化破中的无限稀释扩散系数进行了模拟计算。

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。

The one is how the long-range order of atoms can be restored when atomic diffusion takes place, and the other is how the theoretical expressions in their present form, more than one self-diffusion coefficient parameter, can be applied to experimental results directly.

一是如何正确理解原子的热扩散运动与合金中原子有序排列之间的矛盾；二是能否将扩散系数以外的其它理论参量与原子跳跃迁移的相关实验测量联系起来。

The self-diffusion coefficients and diffusion pathways of hexane, as well as the mobility of the frameworks were investigated, as a function of both temperature and loading.

本文重点研究了温度和分子数对己烷自扩散系数、扩散机理，以及骨架柔性的影响。

At the temperature range of 800～850℃, the deformation activation energy was very close to self-diffusion activation energy of grain boundary, which shows the main deformation mechanism is grain boundary sliding controlled by grain boundary diffusion.

在850℃变形激活能与晶界自扩散激活能十分相近，表明晶界扩散控制的晶界滑动是超塑性变形的主要机制。

Self-diffusion coefficient ; Infinite dilute diffusion coefficient ; Supercritical fluid ; Molecular dynamics ; Molecular simulation

自扩散系数；无限稀释扩散系数；超临界流体；分子动力学；分子模拟

With the increase of pressure, the hydrogen bond strength between water molecules increases, while self-diffusion coefficient decreases. With the increase of temperature, the hydrogen bond strength between water molecules decreases, while self-diffusion coefficient increases.

模拟结果表明，随着压强的增大，水分子间的氢键作用增强，扩散系数减小；随着温度的升高，水分子间的氢键作用减弱，有序程度下降，扩散系数增大。

The results show that the silicide coating is formed by reactive diffusion and the silicification process obeys parabolic relation. The coating is composed of composite structures including MoSi2 outer layer, two-phase transient zone with major NbSi2 and minor Nb5Si3, and Nb5Si3 diffusion inner layer. The coating possesses good high-temperature oxidation resistance and spalling resistance.

研究结果表明：包渗法制备硅化物涂层是通过反应扩散形成的，硅化过程服从抛物线规律；该涂层为复合结构：MoSi2相为主体层；以NbSi2相为主、并含少量Nb5Si3相的两相为过渡区；Nb5Si3相为扩散层。

It establishes the uniform, singular and two kinds of normal distributions models of diffusion layer statistical distribution, the result shows that the more singular the statistical distribution of the cathode gas diffusion layer porosity is, the better the cell performance is, and the more uniform, the worse the cell performance is.

最后，从热力学的角度分析了燃料电池过程的能量转化形式，反应的焓变主要转变成电能和热能两种能量形式；归纳了燃料电池电化学的一些基本理论模型及简单的推导过程；描述了燃料电池效率的一些不同的定义以及对采用热电联供的方式提高燃料电池能量利用效率的分析。

However, the refraction of plane wave in reaction-diffusion system obeys Snell's law only for proper diffusion coefficients and system parameters.

在二维复金兹堡-朗道方程描述的反应扩散振荡系统中，就扩散对平面波折射率的影响进行了数值研究，从Snell定律出发导出了折射率的解析表达式，数值和理论结果表明：在纯扩散情况下，平面波的折射满足Snell折射定律，扩散只影响着平面波折射率的大小；在同时存在反应扩散情况下，只有在适当的扩散系数和系统参数下，平面波的折射才满足Snell折射定律。

Sodium citrate; calcium carbonate; calcium hydroxide; potassium bicorbonate; magnesium carbonate; ferrous sulphate; Zinc sulphate; copper sulphate; manganese sulphate; potassium iodide; sodium selenite.

柠檬酸钠；碳酸钙；氢氧化钙；碳酸氢钾；碳酸镁；硫酸亚铁；硫酸锌；硫酸铜；硫酸锰；碘化钾；亚硒酸钠。

All this to say that I'm glad filmmaking hasn't become completely ironic. I can enjoy an ironic film as much as the next person, but they usually involve a message of some sort. One that's delivered in a smirkingly clever way that requires little in the way of talent.

所有这些都是说，我很高兴电影制作没有变成完全讽刺艺术，我可以和下一个人一样享受讽刺电影的乐趣，虽然他们经常会被划归到一定级别，技术方面不需要很高的才能。