擴散系數；擴散率
Results showed that hydrogen diffusion coefficient exponential decreased with the increase of SOC at the same temperature.
結果表明：在同一溫度下，氫擴散系數隨着SOC的增大，呈指數關系衰減。
The diffusion coefficient of hydrogen in an iron membrane was measured using slightly improved electrochemical hydrogen permeation technique.
一個略加改進的電化學氫滲透技術被用于測定氫在鐵膜中的擴散系數。
Diffusion coefficient is one of the important parameters deciding migration prediction in migration model of compounds from food packaging material.
在食品包裝材料化合物的遷移模型中，擴散系數是決定模型預測性的重要參數之一。
The estimated diffusion coefficient agrees with experiment within an order of magnitude.
估計的反常擴散系數在量級上與實驗一緻。
According to the theory of flow diffusion and convection, three dimensional state equation of radon field is established for constant and variable diffusion coefficient and convection rate.
根據流體場的擴散理論和對流理論，建立了擴散系數與對流速度為常量或變量情況下的氡氣場三維狀态方程；
The factors that influence the nutrients release behavior are as followings: membrane thickness, granule radius, diffusion coefficient, nutrients composition and nutrient dissolving property.
影響聚合物包膜肥料養分釋放的因素主要有：膜厚、顆粒半徑、擴散系數、養分組成及其溶解特性。
The calculation of chloride diffusion coefficient in prestressed concrete structures eroded by chloride ion is discussed.
針對氯鹽侵蝕的預應力混凝土結構，讨論了氯離子擴散系數的計算。
The determination of material structure, performance parameters and membrane resistance, membrane diffusion coefficient of the F4112 ion exchange membrane were introduced.
介紹了F4112離子交換膜的材料結構、性能參數及膜電阻、膜中擴散系數的測定方法。
Expressions of the phonons dispersion, density of the phonon state and the self-diffusion coefficient at the some conditions are also introduced.
此外，還介紹了在一定條件下的聲子色散關系、聲子态密度和自擴散系數的表達式。
The self-diffusion coefficient measurement shows that the mixed micelles are larger than the pure micelles of STS.
自擴散系數測量表明，混合膠束比單一陰離子表面活性劑形成的膠束大。
In salt water the composites had less water absorption, absorption rate and diffusion coefficient than that in DI water.
與在去離子水中相比，材料在鹽水中飽和吸水率、初始時吸水速率和水擴散系數較小。
Finally, the relationship between the stability of the rotating wave and the diffusion coefficient is discussed.
最後對旋轉波的穩定性與擴散系數的關系進行了讨論。
A new mutual diffusion coefficient model was proposed based on the relation between self-diffusion coefficient and friction coefficient.
根據分子間摩擦系數與組分自擴散系數關系，提出一個新的互擴散系數模型。
The equilibrium absorption stu***s indicate that the permselectivity of the anion exchange membrane is related not only to the component solubility, but mean diffusion coefficient as well.
三種抗衡離子膜的平衡吸收實驗表明，該陰離子膜的選擇滲透性不僅與醇水在膜中的溶解度有關，而且取決于平均擴散系數。
The average value of hydrogen diffusion coefficient in metal hydride(MH) electrode was measured by constant current discharge method.
利用恒流放電法測定了金屬氫化物（MH）電極中氫原子擴散系數的平均值。
Physical properties refer to viscosity, density, surface tension, diffusion coefficient, relative volatility and so on.
物系性質主要指粘度、密度、表面張力、擴散系數及相對揮發度等。
The mass transfer equation was introduced into heat transfer model of falling film evaporation. The radial velocity, mass diffusion coefficient and variation of film thickness were taken into account.
将傳質方程引入到垂直管降膜蒸發傳熱模型中，求解時考慮了徑向速度、質量擴散系數和膜厚變化對傳熱的影響。
The coefficients in the equilibrium distribution are determined by the convection coefficient and the diffusion coefficient.
由對流擴散方程的對流系數和擴散系數确定了局域平衡分布函數的系數。
When the temperature and gel don't change, the increasing speed of precipitation is related to electrolyte density, diffusion coefficient and so on.
在溫度和凝膠介質一定時，沉澱的增長速率與電解質濃度、擴散系數及沉澱物質的溶度積常數有關。
The model of liquid diffusion in a solid fractal medium is developed by adopting random theory, and thus the relationship of diffusion coefficient between fractal medium and free space is obtained.
采用隨機過程理論導出了液相在固體顆粒分形介質中的擴散方程，得到了分形擴散系數與自由空間擴散系數的關系式。
To calculate distribution of sediment concentration in vertical under wave and current, a model of silt diffusion coefficient distribution in vertical is set up.
為了計算波流共同作用下含沙量沿垂線的分布，建立了沿垂線分布的泥沙擴散系數模型。
The density maximum of water and some related properties such as distribution function and diffusion coefficient were simulated in NVT ensemble by applying molecular dynamics method.
本文采用分子動力學方法對NVT 系綜中水的密度極值問題以及分布函數和擴散系數等相關性質進行了模拟。
The relation of diffusion coefficient with temperature has also been simulated.
同時還模拟了流體自擴散系數隨溫度的變化關系。
The mixture ratio of C40 marine high performance concrete is optimized through test of the hydration heat of binding material, slump, chloride ion diffusion coefficient, anti-crack rand of concrete.
通過測試膠凝材料水化熱、混凝土的坍落度和氯離子擴散系數、抗裂等級等性能，對C40海工混凝土的配合比進行了優化設計。
Increased partition coefficient and diffusion coefficient values were obtained with these enhancers.
這些促進劑能增加藥物的分配系數的擴散系數值。
Diffusion of oxygen in the bonding coating and substrate is mainly grain-boundary diffusion. Grain-boundary diffusion coefficient is far greater than intragrain diffusion.
氧在粘結底層和基體中的擴散是以晶界擴散為主，晶界擴散系數遠遠大于晶内的擴散系數。
Objective To compare effectiveness of ADC(apparent diffusion coefficient)value and T2 value in the diagnosis of small focal hepatic lesions.
目的比較表觀擴散系數（ADC）及T2值在區分肝髒局竈性小病變性質方面的價值。
The paper presents the new compatible formula which indicates the relationship between the diffusion coefficient of cationic dyes and relative affinity of dyes.
文中介紹了用于表示陽離子染料的擴散系數和相對親和力的關系的新相容條件式。
|diffusivity/diffusion rate;[土壤][電子][物]擴散系數；擴散率
擴散系數（Diffusion Coefficient）是描述物質在介質中擴散速率的關鍵物理量，通常用符號 ( D ) 表示，單位為平方米每秒（m²/s）。以下是詳細解釋：
擴散系數量化了物質因熱運動從高濃度區域向低濃度區域遷移的速率。例如：
根據菲克第一定律（Fick's First Law）： $$ J = -D frac{partial c}{partial x} $$ 其中：
若需具體數值或實驗測定方法（如動态光散射法），可進一步補充說明。
"Diffusion coefficient" 是一個物理學和化學學科中常用的術語。它表示物質在給定溫度和壓力下在另一種物質中“擴散”的速度。該術語通常用于描述分子或離子************的行為，但也可以用于其他領域，如化學工程和材料科學。
擴散系數通常用符號“D”表示，其單位為“平方米每秒”（m²/s）。它可以通過實驗測量或使用模型計算得出。擴散系數的值取決于物質的性質、溫度、壓力和其他環境條件。
在化學工程中，擴散系數通常用于描述氣體或液體在固體或液體中的傳輸。例如，擴散系數可以用于預測在化學反應中氣體或液體的傳輸速率，或者用于設計分離設備，如蒸餾塔。
擴散系數是描述物質在給定環境中擴散速度的物理量。當兩種物質之間存在濃度差時，物質将從高濃度區域向低濃度區域擴散，直到濃度達到平衡。擴散系數越高，物質在單位時間内擴散的距離越遠。
擴散系數的值還可以提供有關物質分子結構和相互作用的信息。例如，分子量較大的物質通常具有較低的擴散系數，因為它們的分子間相互作用更強，擴散速度更慢。
【别人正在浏覽】