查询词典 diffusion air pump

One way is to regard them as the random variables submit to a certain distribution; another is to take them as a random process—— we derive random variables form any of its function's time development, and, the diffusion equation could be partially approached by a equation which is similar to the Ito stochastic integral equation so that the Ito stochastic integral equation is inter-related with the diffusion equation. Therefore, this process could basically reflect the uncertainty in different models.

PSFEM法是假定基本随机变量在均值点处产生微小摄动，利用Taylor级数把随机变量表示为确定部分和由摄动引起的随机部分，从而将有限元控制方程转化为一组线性的递推方程，求解得出位移的统计特性，进而求出应力的统计特性。

It was found that sulfuric acid, 2-naphthalenesulphonic acid and sulfurous acid could be effectively separated by competitive exchange adsorption in views of action force difference of the components with the resin. The exchange adsorption dynamic diffusion parameters were calculated with diffusion equation for solids and liquid films, and the rate-determining step was determined. The model of breakthrough curve for the resin bed was suggested, and applied to simulate the breakthrough process for each component.

通过单组分、双组分和多组分平衡数据的测定，发现对于硫酸-萘磺酸-亚硫酸混合体系，可以利用不同组分与树脂作用能的不同，通过竞争交换吸附实现分离；以固相扩散方程和液膜扩散方程对交换吸附动力学参数进行了估算，确定了交换吸附过程的控制步骤；建立了床层穿透曲线模型，并对各组分穿透过程进行了模拟。

Vascular cognitive impairment ; Diffusion tensor imaging ; Histogram analysis ; Apparent diffusion coefficient ; Anisotropy index

血管性认知功能障碍；扩散张量成像；直方图分析；表观弥散系数；各项异性指数

Vascular cognitive impairment Diffusion tensor imaging Histogram analysis Apparent diffusion coefficient Fractional anisotropy

血管性认知功能障碍；扩散张量成像；直方图分析；表观扩散系数；各项异性分数

PARTⅢMagnetic resonance imaging and diffusion tensor imaging of gray matter damage in multiple sclerosis Objective To study the Magnetic resonance imagingcharacteristics of the gray matter lesions in multiple sclerosis,and to investigate the occult damage in normal appearing gray matterby quantitative analysis using diffusion tensor imaging.

第三部分多发性硬化脑灰质损害的MRI表现及DTI定量研究目的：分析多发性硬化患者脑灰质病灶的磁共振成像特征，利用弥散张量成像定量研究MS的正常表现脑灰质是否存在隐匿性损伤。

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。

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。

But Severus escaped the hands of those that Julianus had sent to murder him and sent a letter to the praetorian guard, giving them the signal either to desert Julianus or to kill him.

赛维鲁总算逃过了尤利阿努斯派来的杀手，并写了一封信给罗马的禁卫军，向他们发出信号，要么抛弃尤利阿努斯，要么干掉他。他们立即服从了。

This text is in terms of this of " human nature ", it is under the influence of western literature human nature thought to probe into, awakening in human nature of novel works and all sorts of limitations that affectionate The school of Mandarin Duck and butterfly.

本文便是从"人性"这一角度，探讨在西方文学人性思想的影响下，清末民初鸳鸯蝴蝶派的言情、哀情小说作品在人性方面的觉醒与种种局限。