查询词典 diffusion knife

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

热扩散系数；纵向分散；横向扩散；热污染

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。

Arc-glow plasma depositing technique is a new surface coating method. With the help of vacuum arc discharge, a cold cathode arc source continually emits ion beams of coating elements with high currency density and high ionizing ratio.Upon the ion bombard and diffusion work on, the surfaces of the parts form deposited layers, diffusion layers. In this study, a commercial magnesium alloy AZ91 was coated with Ti film layer.

加弧辉光离子渗镀技术将辉光放电与弧光放电有机地结合起来，利用辉光放电空心阴极效应使工件迅速升温，同时在真空容器壁上设置一个或多个金属阴极电弧靶源，利用真空电弧放电而不断地发射出高能量、高电流密度、高离化率的欲渗金属离子流，依靠扩散和离子轰击作用快速渗入工件表面层，在工件表面可以形成渗层、镀层、渗镀结合层。

In this thesis, we analyze the zeroth order term of eigenpolynomial of linearized matrix, and a necessary condition for diffusion-driven instability of n-species of a reaction-diffusion system is attained by using the Routh-Hurwitz criterion.

本文我们讨论含有n(。23)个物种的反应系统，对系统在无扩散时稳定的平衡态解附近线性化，通过分析线性化矩阵特征多项式的零次项，根据Routh一Hurwitz准则，得到了零次项使系统产生扩散驱动不稳定性的必要条件。

At the temperature as low as that at which the monomer cannot diffuse in large scale,adatom nucleation and island formation depends on the increase of adatom density.With the increase of temperature,the film growth mode depends on the competition between in-plane diffusion and inter-layer diffusion of monomers.

当薄膜生长温度低于单原子的扩散温度时，表面原子的成核和表面岛的生长主要是由沉积原子的空间随机性和表面原子密度增加而决定的，随着薄膜生长温度的提高，薄膜的生长模式则取决于单原子的层内扩散和层间扩散的竞争。

Particle diffusion on the substrate also have random characteristic, so naturally particle deposition, adatom diffusion and adatom evaporation are described as statistical process.

因此，可以很自然地将生长单元的沉积，扩散和脱附都作为统计过程来进行描述，而蒙特卡罗方法方法本质上就是一种统计方法。

Keywords: statistic advective diffusion differential-integral equation;transilient turbulence theory;climate diffusion model;climate phase space

中文关键词：统计平流扩散方程；Transilient湍流理论；气候扩散模型；气候相空间

The effect of thermal diffusion on electrical properies of SrTiO3 multi-function ceramics with coating ion was studied by application of the even design expermental method. Microstructure and element analysis were examined by SEM and Energy-Dispersive X-Ray analyss techenolegy. No new intergranuar phrase were oberved.The relationship amang electrical properties,diffusion conditions of the materials were discussed.

采用均匀设计液相涂覆热扩散方法，研究了涂覆离子，热扩散条件等对SrTiO3系陶瓷电性能的影响；用扫描电子显微镜作微观分析，X射线能谱仪作元素分析，证实钠离子的涂覆热扩散未在陶瓷晶粒之间产生新相，钠离子在晶粒内表面形成了一扩散层，讨论了扩散条件与电性能的内在联系。

RESULTS: Fluorescein concentrated cell presented extensively around micro-vessels after injection of both FA and FD. The speed of diffusion of FD in the brain was faster than that of FA. After FA injection, fluorescein concentrated image presented also around vessels, which developed to the distal along vessels, those in the cortex developed toward cerebral surface and those in the white substance toward ventral basicranial vessels of brain. The speed and distance were all bigger than the simple diffusion.

结果：注入FA，FD之后均可见微血管周围广泛分布荧光浓集细胞；FD在脑内扩散速度大于FA；FA注入后还出现血管周围荧光浓集影像，并沿血管通向远处，在皮质者通向脑表面，在白质者通向脑腹侧颅底血管，速度与距离均大于简单扩散。

Using sagital T1 weighted imaging (T1WI) of MRI and axial Diffusion imaging of MR and axial diffusion weighted imaging is a precise method to diagnosis callosal infarction.

结合MRI矢状T1加权(T1WI)扫描，和弥散加权成像横断扫描是诊断胼胝体梗死的准确的方法。

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。