查询词典 diffusion constant

The former consists of the spiculate FeAl3 phase which formed by the temperature deduction and the latter is composed of the lingulate FeAl3 and Fe2Al5 phases which embedded the substrate. Diffusion annealing as taken at 850℃, the structure changs apparently with increasing of the diffusion annealing time.

结果表明：浸镀层由表面富铝层及扩散层构成，富铝层包含降温形成的针状FeAl3相，扩散层由FeAl3、Fe2Al5相组成，形状如舌状指向基体。850℃扩散退火，随扩散时间的延长镀层组织结构明显变化。

Objective To investigate the pathogenesis of the abnormal diffusion in the white matter tracts in patients with neuromyelitis optica using diffusion tensor imaging.

在视神经脊髓炎(neuromyelitis optica，NMO)患者，脑白质纤维束的扩散异常已有报道，但其分布模式及发生机制尚不清楚[1]。

The investigation indicated that the diffusion and release behavior of the guest molecules in the self-assembled organogel followed the Higuchi equation and diffusion-controlled mechanism of Fickian model.

两种客体分子的累积释放率与时间的平方根成良好的线性关系，符合Higuchi方程，属扩散控制的Fickian释放机理。

Horizontal diffusion was used to control small-scale noise that results from numerical dispersion, nonlinear instability, and discontinuous physical processing, etc. by adding a linear forth-order monotonic horizontal diffusion with orographic flux limiting to the prediction equation.

水平扩散方案是将一个通量受地形限制的线性四阶单调水平扩散项加到预报方程，去控制由数值扩散、非线性不稳定及不连续物理过程等引起的小尺度噪音。

In addition,the mechanism isdiscussed on the prevention of interface diffusion via S-passivation.The FexS-dominateinterface reaction layer,is considered to prevent the reaction of Fe with As further meanwhilestabilizes the interface,therefore inhibits the diffusion from the substrate into Fe overlayer,which is different from the model of Anderson.

并且提出了S钝化阻止界面扩散的内在机制，认为在钝化层基底上形成的界面反应层，阻止了Fe和衬底As的反应并稳定了界面，从而阻止衬底元素向薄膜层的扩散，这与Anderson提出的模型不同。

In this paper the sulpho nitro oxy carburizing and the hydrogen removing technology of round broach, the structure of diffusion layer and the relation between the depth, properties, the hydrogen content of diffusion layer and the service life of the broach are studied.

研究了连杆圆拉刀的氮碳硫氧共渗与去氢处理工艺，以及渗层组织结构、层深度、能、层含氮量与拉刀寿命的关系。

The molecular diffusion mechanisms describe the diffusion process of the paraffinic hydrocarbon to the surfaces due to the temperature gradient of the liquid phase.

分子扩散机制描述石蜡烃类扩散过程的表面由于液相的温度梯度。

The descriptive studies can not only help us recognize the institutional characteristics of REET diffusion in rural China, but also help us interpret the success of the REET diffusion in rural China.

实证研究不仅可以帮助我们认识中国农村地区可再生能源与节能技术推广体制的特点，也可以帮助我们揭开中国农村地区可再生能源与节能技术推广成功之谜。

Furthermore, the knowledge accumulated on the nature of the innovation diffusion process is still rather limited and without a satisfactory theoretical framework. Based on microeconomics, games theory, and environmental economics, a general economic model of REET diffusion is established in this thesis, which combines the market equilibrium and the Stackelburg equilibrium.

本文在微观经济学、博弈论和环境经济学基础上，构建了一个一般性的可再生能源与节能技术推广经济学模型，将代表市场制度的市场均衡和代表政府干预制度的Stackelburg均衡有机结合在一起，为定量研究以可持续发展为导向的可再生能源与节能技术推广的体制与政策提供了理论依据。

The plasticizer diffusion was obtained by Einstein equation. The diffusion coefficients 10-4 cm^2s^(-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273，298，310，323，348K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平方公分s^(-1)）。

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。