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- surface diffusion coefficient 表面扩散系数
- The experimental results show that surface mortar layer can significantly reduce the chloride ion diffusion coefficient of concrete. 结果表明,致密的表面砂浆层能显著地降低混凝土本体的氯离子扩散系数。
- The moisture diffusion coefficient was increased at the early drying sta... 随后,随含水率逐渐降低呈逐步减少趋势。
- The average diffusion coefficient of carbon in surface layer of steel20 rare ea rth carburized at880 and900℃ for8 h was calculated by substituting the mea sured layer depths into the diffusion equation. 通过对20钢常规气体渗碳和稀土渗碳层深的测定,计算出稀土渗碳时碳在奥氏体中的平均扩散系数。
- The charge transport diffusion coefficient, DC, and apparent heterogenous electrode reaction rate constant, ks, in DMF and DDAB film systems were estimated by CV respectively, and the surface coverage was evaluated. 应用循环伏安法估计了DMF体系、薄膜体系中的电荷传递扩散系数Dc、表观非均相电极反应速率常数k_s及薄膜电极的表面覆盖度。
- The influence of surface diffusion on CVD diamond nucleation was found very important. 表面扩散对CVD金刚石成核有重要影响。
- A great impact of surface diffusion on CVD diamond nucleation is discovered and investigated. 发现和研究了表面扩散对CVD金刚石成核的重要影响。
- The diffusion coefficient of RaA atoms,being 0.071cm~2/s,was determinedusing two-filter wall deposition method. 采用壁沉积方法;测得 RaA 的扩散系数 D=0.;071cm~2/s。
- The longer time and the bigger convection and diffusion coefficient was,the bigger the polluted region. 作用时间越长,扩散系数越大,污染物影响范围越大,质量浓度值越高。
- Phosphor SrAl2O4: Eu, Dy synthesized by surface diffusion method has higher luminescence intensity than that by the solid state method. 用表面扩散法制备SrAl_2O_4:Eu,Dy磷光体。 用此方法制备的样品的发光强度高于传统固相法制备的样品。
- Results Increasing vascular permeability coefficient P and the drug diffusion coefficient D, AUC will increase. 结果增大肿瘤间质中毛细血管对药物的通透性P,提高药物在肿瘤间质的扩散系数D,AUC的值均增大。
- The effective diffusion coefficient and rate constant of intraparticle transport were calculated. 求出了颗粒内有效扩散系数和颗粒内扩散速率常数。
- Diffusion coefficient can be deduced from matano method using electronic microprobe. 采用电子显微探针法,“俣野”数值方法推导出扩散系数。
- The impurity concentration profile depends on epitaxy growth velocity, growth time and impurity diffusion coefficient. 如果杂质的扩散系数很小,杂质在外延层中的深度分布是均匀的。
- The effective diffusion coefficient of water-solubility chloride ion in GBC concrete is 17% of that in the OPC. GBC混凝土比普通混凝土具有更强的抗氯离子扩散性能,其水溶性氯离子有效扩散系数只有普通混凝土的17%25。
- At the same sintering temperature, the diffusion coefficient during the PCH process is larger than that of HP. 烧结温度越高,元素的相对扩散系数越大;相同烧结温度下,PCH样品的相对扩散系数要高于HP样品,即PCH过程中原子扩散要快于HP过程。
- The results showed that the viscous flow plus Knudsen diffusion could explain the permeation mechanism of supercritical CO_2 through macroporous membranes, where the surface diffusion was negligible. 理论分析与实验结果表明,当表面扩散可以忽略不计的时候,粘性流和Knudsen扩散可以解释超临界CO_2通过多孔膜的渗透行为。
- To calculate distribution of sediment concentration in vertical under wave and current, a model of silt diffusion coefficient distribution in vertical is set up. 为了计算波流共同作用下含沙量沿垂线的分布,建立了沿垂线分布的泥沙扩散系数模型。
- Moreover, multiple frequency stimulation method can increase consumption of IC obviously and surface diffuse reflection method can improve surface emission coefficient of IC availably. 混和信号激励法能明显增大三极管放大电路耗散功率,特别是第一级耗散功率;增频激励法能有效提高IC耗散功率;表面漫射法能有效增大元器件的发射系数。
- Aim: To explore apparent diffusion coefficient (ADC) in the diagnosis of infarction core and ischemic penumbra(IP) affter acute cerebral infarction. 探讨磁共振表观扩散系数(adc)值对急性期脑梗死核心和缺血半暗带(IP)的诊断价值。