查询词典 diffusion constant

The plasticizer diffusion was obtained by Einstein equation. The diffusion coefficients (10-4 cm2·s-1) of dioctyl sebacate are respectively 0.0010,0.0020,0.0025,0.0031,0.0043 at the temperature of 273,298,310,323,348 K; and are respectively 0.0025,0.0020,0.0018,0.0015 at the content of

环境温度为273，298，310，323，348 K时，DOS在丁羟推进剂粘接体系中的扩散系数分别为0.0010，0.0020，0.0025，0.0031，0.0043； DOS含量为23%，37.5%，47%，60%时，扩散系数分别为0.0025，0.0020，0.0018，0.0015(单位10-4 cm2·s-1)。

The first the relation of AD model and the energy variety of image is educed by thermal diffusion and the diffusion equations based energy flux, and proves the image processing by energy flux sufficing maximum-minimum principle, the variety of image energy is equivalent to that of image intensity.

首先通过热扩散及热扩散方程、基于能量流的扩散方程，导出了向异性扩散模型与图像能量的变化过程之间的关系，并证明了利用能量流方法获得的图像处理过程同样满足极大极小原理。

Four thin-layer drying models were investigated for the description of FIR-assisted freeze-drying characteristics. The models were exponential model, Page model, diffusion model, and approximation of the diffusion model. Tests were conducted using a three-level, three-factor (drying temperature, distance between sample and FIR heater, and sample thickness) design, and quadratic polynomial analyses were performed to relate the drying parameters of thin-layer drying model. The performance of these thin-layer drying models was evaluated by comparing the coefficient of correlation (R2), the sum of squares, and the RMSE amongst four models. Drying parameter K of the Page model gave the best results in describing freeze-drying with FIR of Tylose and sweet potato.

运用四种薄层乾燥模型（指数、Page、渗透模型及近似渗透模型）研究远红外线冷冻乾燥之乾燥特性，实验采用三阶层、三因子（远红外线加热器设定温度、远红外线加热器至样品表面之距离及样品之厚度）的实验设计，对於薄层乾燥模型的乾燥参数以二次多项式函数表示之，乾燥参数之二次多项式函数的最适性判断主要是藉由决定系数、模式缺乏适合性及均方根误差等值的比较而加以评估，以Tylose及甘薯样品而言，其中四种薄层乾燥模型的乾燥参数以Page模型之K值的结果为最佳。

Objective To investigate the evolution of diffusion indices in the pyramidal tract with Wallerian degeneration due to cerebral infarction using diffusion tensor imaging.

目的 应用弥散张量成像探讨脑梗死后锥体束华勒氏变性弥散参数的变化规律。

The coarsing rate is much higher than that expected by volume diffusion. It coarsens by short circuit powder surface diffusion.

预处理时，表面析出相的粗化速度很高，其机理不是通常的体扩散，而是一种表面扩散方式的粗化。

On the achievement foundation in the domestic and foreign technological innovation diffusion research, this thesis elaborates representative personages typical viewpoint, points out the characteristic and limitation of some; afterwards it construes some concepts of technical innovation diffusion.

本文在国内外技术创新扩散研究的已有成果基础上，阐述代表人物的典型观点，指出其中一些观点的特点和局限性；随后界定了关于技术创新扩散的一些概念。

The applications of outgassing technology in industrial field were summarized with three kinds of outgassing models analyzed, ie. Schram model, diffusion model and adsorption-diffusion model based on Malev's theory.

总结了放气研究在工业领域的各种应用，分析了真空环境下非金属材料放气的三种模型：Schram模、扩散模型和基于马列夫理论吸附扩散模型。

On the basis of analyzing the product diffusion behavior in knowledgeable manufacturing, a nonlinear system model of the repurchasing competitive products' diffusion behavior is established.

基于对知识化制造环境中产品扩散行为的分析，给出重复购买竞争产品扩散行为的非线性模型。

On the basis of analyzing the product diffusion behavior in knowledgeable manufacturing,a nonlinear system model of the repurchasing competitive products' diffusion behavior is established.

市场竞争的日益加剧缩短了产品的生命周期，加速了产品的更新换代，继而对制造企业快速适应市场变化的能力提出了越来越高的要求，并由此催生了知识化制造[1]。

After heat treatment at 1100C in air, the elements of the substrate and the bond coat diffuse and the diffusion of Ni is an uphill diffusion. The layer of r " phase and the layer of A12O3 or NiAl2O4 were formed at the interface of the substrate and the bond coat and at the interface of the bond/top coat, respectively. The thickness of the r " phase and the oxide layer increases with the increase of the time of the heat treatment.

经1100℃热处理，基体和底层中元素发生了相互扩散，并在界面析出γ'相，γ'的存在使界面的结合为冶金结合；在底层／面层界面由于底层被氧化和Al与ZrO_2氧化还原反应形成Al_2O_3等氧化物，Y'和氧化物的厚度随热处理时间延长而增加。

The changes of the HAF after liver injury may be related to the volume of blood loss, the intraabdominal pressure and the pneumoperitoneum duration.

肝撞击伤伴失血后肝动脉血流量的变化与失血量、气腹压力以及气腹持续时间等有密切联系。

Reneging on our commitments to the world's poor cannot be an austerity measure, she said.

放弃我们给世界上的穷国的承诺不能成为一种紧缩措施。