The intra - and inter - phase diffusion effects were analyzed . it was pointed out that the rate determining step will change with the temperature . the effective factor was calculated to evaluate the level of the inner diffusion 对反应中的内、外扩散行为作了分析，指出了速控步骤随温度的改变，并计算了衡量内扩散程度的有效因子。
On the basis of analysing the mechanism of improvement of the adsorption mass transfer by ultrasound field , a batch model cosindering pore difusion and surface diffusion , and a fixed - bed homogeneous model of mass transfer is developed . 论文在分析超声场强化固-液吸附传质的机理上，提出了考虑孔内扩散与表面扩散的静态传质模型以及考虑轴向扩散的均相动态传质模型。
We found that the cz silicon wafers preannealed by rtp in nitrogen atmosphere are significantly characteristic of ncz silicon wafer , that is , the n - o complexes related stds are also generated in the cz wafer subjected to rtf in na and subsequent proper heat treatments 研究发现，氮气氛下高温rtp处理的cz硅样品在后续热处理中表现出了掺氮硅的退火特性，进而证明了在氮气氛下rtp处理中氮发生了内扩散。
As duplication through digital technology has become much cheaper , simpler and faster than ever before , the production of piracy has been being stimulated greatly . in addition , through internet have the infringement outcomes spread throughout the world very quickly 数字技术使作品的复制变得从未有过的廉价、简便和快捷，大大刺激了非法盗版的产生，而网络环境又将侵权的结果迅速在全球的范围内扩散。
At the same time , the intrapartical diffusion and liquid internal mass transfer can been enhanced by ultrasound field , owing to additional stirring , the increasing rate of intraparticle diffusion coefficient is enhanced , while that of the liquid film mass transfer coefficient is reduced under ultrasound field 模型研究表明： freundlich ?两相阻力模型计算得到浓度与实验测定值非常吻合，超声场能有效地强化浸取粒内扩散与液膜传质，搅拌作用下超声强化液膜扩散的的能力降低，强化粒内扩散的能力增强。
In - diffusion of nitrogen during rtf was affected by rtf temperature , time , and thickness of wafer etc . . it was estimated that the diffusion coefficient of nitrogen in silicon at 1250 ? was 4 . 6 x 10 " 5 cm2 / s . it is concerned that during the rtf at high temperature nitrogen atoms and vacancies may react to generate niv2 complexes that could diffuse very fast in silicon 我们还研究了rtp处理温度、时间以及硅片厚度对氮内扩散的影响，并推算出rtp处理过程中氮的内扩散系数高达4 . 6 10 ~ ( - 5 ) cm ~ 2 s ，比氮对的扩散速度还要大一个数量级，我们认为可能是由于氮和空位形成了具有较大扩散速度的复合体所致。
To integrate the results , this survey indicated that respondents adoption of the suggested preventive health measures against atypical pneumonia were related to their self - efficacy in performing these health measures , concerns about the spread of the disease to the community as well as adequate knowledge about the disease 归纳调查结果，受访市民采取有关预防非典型肺炎的措施是基于认为个人有能力处理此疾病，担忧此疾病会在社区内扩散及蔓延，及对此疾病有足够的认识。
Based on the analysis of gas - solid multiphase catalytic reaction , the chemical reaction model is established . when the reaction is controlled by the chemical dynamic , the reaction rate is introduced by consideration of the adsorption and desorption effects . when the reaction is controlled by mass transfer , the diffusion coefficient is established which can present the flow rate increases in small reynolds domain ; for the internal diffusion , the internal diffusion coefficient is derived , and then the internal diffusion is coupled with chemical reaction to represent the phenomenon that the diffusion and the chemical reaction occur cocurrently 本文在考虑催化转化器载体内发生的传热传质现象的基础上,建立了催化转化器的一维单孔道和三维多孔道传热传质模型;在分析载体内以气-固多相催化反应为特点的工作机理的基础上,建立了催化转化器的化学反应模型:当催化转化处于化学动力学控制区时,引入了考虑吸附、表面反应和脱附的表面化学反应速率公式,当催化转化处于质量输运控制区时,引入了决定外扩散能力的扩散系数公式和和决定内扩散速率的内扩散系数公式,并与化学反应速率相耦合,得出由扩散过程决定的化学反应速率公式。
Although the diffusion of nitrogen and oxygen in silicon has been intensely studied respectively , the mechanism on in - diffusion of nitrogen and oxygen into silicon during rt p is unavailable . this research will provide theoretic direction for rtp application to defects engineering 尽管国内外对硅中氮、氧杂质的扩散行为进行了大量的研究，但他们在高温rtp处理过程中的内扩散行为在国内外的研究领域中至今仍是一个空白，这一研究将为快速热处理在硅材料缺陷工程中的应用提供理论指导。
12 . to integrate the results , this survey indicated that respondents adoption of the suggested preventive health measures against atypical pneumonia were related to their self - efficacy in performing these health measures , concerns about the spread of the disease to the community as well as adequate knowledge about the disease 12 .归纳调查结果，受访市民采取有关预防非典型肺炎的措施是基于认为个人有能力处理此疾病，担忧此疾病会在社区内扩散及蔓延，及对此疾病有足够的认识。
