mass diffusion 中文意思是什麼
mass diffusion
解釋
質量擴散-
Combined heat and mass transfer by natural convection which is caused by heat and mass diffusion can be seen in nature and some processes of industry, such as evaporation and desiccation. these processes relate to aeronautics, hydraulics, mechanics, chemical engineering, oceanography and aerography
熱及物質擴散引起的傳熱傳質復合自然對流常見于自然界和蒸發、乾燥等工業過程，涉及到航空、水利、機械、化工、海洋、氣象等諸多領域，其流體力學和傳質傳熱特性一直是人們研究的重點。 -
This regime is termed mass transport or diffusion limited.
這種方式被稱作質量輸送或擴散控制。 -
The diffusion model and numerical simulation model for chaff clouds are modeled on the assumption that the speed of air where chaff locates is a winner random process and the mass of chaff is zero so it can trace the atmosphere speed very well
摘要假定箔條所在位置處大氣運動速度是一個維納隨機過程，同時在忽略箔條的質量時箔條的運動完全反應當地大氣的運動，在此基礎上建立箔條雲團的擴散模型及數值模擬模型。 -
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.
論文在分析超聲場強化固-液吸附傳質的機理上，提出了考慮孔內擴散與表面擴散的靜態傳質模型以及考慮軸向擴散的均相動態傳質模型。 -
The flow characteristics, distributions of current density and chemical components, and the performance of these two different designs are calculated and compared. the flow and mass transport characteristics are analyzed in detail, which indicate that strong forced convection is produced in the interdigitated flow field, which consist of dead - end gas channel that force the gases through the porous electrodes. results of comparison show that forced convection induced by the interdigitated flow field in the diffusion layer effectively enhances mass transport of reactants and products, thus leading to a higher cell performance and the limiting current density
在傳統流道設計的pemfc中，反應物從流道到催化層的供應和生成物從催化層到流道的排出主要是以擴散為主，而在交叉梳狀流道設計中，以流動帶動的對流傳遞則占據了主導地位，而且這種以對流為主的傳遞機理大大提高了反應物和產物傳遞速率，從而有效地改善了電池的極限電流密度和極化性能等特性。 -
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 ?兩相阻力模型計算得到濃度與實驗測定值非常吻合，超聲場能有效地強化浸取粒內擴散與液膜傳質，攪拌作用下超聲強化液膜擴散的的能力降低，強化粒內擴散的能力增強。 -
According to gaseous " molecular kinetic, the mass diffusion rate is within finite value. so theoretical conclusion of mass flux ' s producing and the essential relation of flux vs. force could be drawn. with the assumption that local density states in near equilibrium and the distribution is gradual changed, the classical first pick ' s law was modified considering mass relaxation time
根據氣體分子運動論對質量傳播速度為有限值情況下的質量流的產生及流與力之間的本構關系作了理論推導，在假定局域濃度處于近平衡態，其分佈為漸進的情況下得到了考慮質量鬆弛作用的經典fick第一定律的修正式。 -
These concrete works are the following : 1, a new heterogonous shs model had been proposed, which first included all the relative materials characters, such as reactants particle sizes, changeable heat - conductivity and mass diffusion during shs and so on, and its chemical reaction characters, initial combustion status
具體工作如下： 1 、提出了微觀不均勻的燃燒介質模型，在此基礎上完成了對非均質燃燒模型數學化的研究，並提出了「燃燒基團」模式，解決了模型數學分析量大的難點。 -
Firstly, it studied the incubation time in new technology diffusion applied mass model, interpreted the influence factors to incubation time
首先運用bass模型對創新產品的市場醞釀期進行了研究，解釋了影響市場醞釀期的諸多影響因素。 -
Generally, the membrane thickness is much larger than the pore dimension. therefore, the resistance of the pore channel was the control resistance of the membrane diffusion process. while the existences of the stephen diffusion and pore interaction well explained the reason why the total membrane surface would be used as the interfacial area through where the mass transport took place
盡管由於膜的厚度比孔的尺寸要大很多， stephen擴散以及孔之間的相互作用對通過膜的總擴散阻力影響很小，但它們存在的結果是使整個膜表面的氣體濃度趨於一致。 -
City construction is identical with applying load on soil mass, so researching maximal area coverage and locus of stress diffusion, transfer and concentration in soil will be helpful of analyzing the deformation and stabilization of city foundation. it also is important content in the research of ultimate bearing resistance of city geologic environment, and it will provide beneficial reference for city disaster reduction, prevention and city sustainable development
城市建設等同於在城市下伏土體上不斷施加荷載，土中應力分佈、傳遞、集聚的最大區域、部位的研究，將有助於分析城市地基變形與穩定問題，是城市地質環境極限承載力研究中的重要內容，可為城市減災、防災，城市可持續發展提供有利的依據。 -
To investigate the space / time distributions and occurrence and evolution of such events, the diffusion pattern over deserts, turbulent transfer features in sandstorm weather, the particle size distribution, mass concentration and its distribution, optic properties, chemical composition and physical factors responsible for the initiation of raising sands, we made integrative observation and sounding of sandstorms deep in the large - scale desert area, including tengri, badanjilin and maowusu, with the items consisting of micrometeorological measurement, 3d wind observation, data from kb - 120 and anderson samplers of mass concentrations of sands with their spectrum, the distribution of aerodynamic particle sizes from the aps3310a, retrieval of aerosols " optic depth from sunphotometer data, assay of the chemical composition by means of neutron activiation analysis ( naa ) and integrated study of all related factors for causing sandstorm to occur, based on the observations of all kinds
利用所取資料，系統分析了不同強度沙塵天氣條件下沙塵氣溶膠質量濃度和質量濃度譜、粒子譜分佈、光學厚度、化學組分等特徵；綜合分析了影響沙塵起動的諸物理因子在沙塵起動中的作用；用沙塵輸送模式對一次沙塵暴天氣造成的泥雨過程的形成機制進行了模擬。歷史氣象資料統計分析表明，沙塵暴有其高發期（ 4 、 5月）和高發時段（ 14 - 20時） ， 14時到20時之間發生的沙塵暴約占沙塵暴總次數的66 。揚沙和沙塵暴天氣條件下，湍流動量通量和湍流感熱通量都是重要的湍流交換，沙塵暴發生前近地層的超絕熱不穩定對沙塵暴天氣有加強作用。 -
Topics covered include : mass transport through membranes ( diffusion, osmosis, chemically mediated, and active transport ), electric properties of cells ( ion transport ), equilibrium, resting, and action potentials, kinetic and molecular properties of single voltage - gated ion channels
內容包括：細胞膜上的物質傳輸（擴散、滲透、化學為媒介的傳輸以及主動傳輸） ；細胞的電子特徵（離子傳輸） 、平衡、靜息和動作電位；單個電壓門控離子通道的動力學和分子特性。 -
Both ion diffusion and transport of ions to the root surface by mass flow appear to be dependent on soil moisture content.
離子擴散和通過質體流動把離子運送到根表面，看來似乎都取決于土壤的含水量。 -
The effects of interfacial resistance, superheating, free convection due to both temperature and concentration gradients, mass diffusion and thermal diffusion, and variable properties in both the liquid and gas - vapor regions were considered
分析中，考慮了相間阻力、液膜波動、蒸汽過熱度、因溫度和濃度梯度引起的自然對流、質擴散和熱擴散以及物性的變化。 -
In the study of the diffusion - reaction equation, the mass diffusion was believed could cause some order - behavior in the reaction, however in shs this effect was n ' t found. it was believed due to that mass could mainly diffuse in a fixed direction in shs, the combustion wave ' s direction
由於自蔓延過程中，燃燒波基本上是以單一行波的方式蔓延過樣品，因而擴散過程的方向基本是確定的單一方向，在shs過程中的作用主要是引起能量和物質的耗散，沒有導致通常擴散反應可能形成的有序性。 -
The characteristic of combined heat and mass transfer by natural convection has been the focus of researches for a long time. numerical analysis is conducted for combined heat transfer and mass transfer by natural convection on inclined surface. effects of the inclination angle and the ratio of buoyancies due to heat diffusion and mass diffusion on fluid flow and heat and mass transfer characteristics have been investigated for pr = 0. 7 and sc = 0. 05 - 5. 0
本文採用數值計算方法研究了傾斜平面上的傳熱傳質復合自然對流，求解了動量、能量及質量的完整方程，考察了熱質擴散共存時傾斜平面上的流動和傳熱特性，著重分析了熱浮力及物質擴散浮力之比b和傾斜角度對流體流動和傳熱傳質特性的影響。 -
The spectral dimension is estimated by monte cario ( random walk ) method. the calculated results show that mass diffusion in fractal media is non - homogeneous and nonlinear
上述模擬的結果使我們對分形多孔介質中的熱傳輸規律有了更深的了解。 -
This paper mainly deals with the research on the mass diffusion, dispersion and heat conduction in fractal porous media
本論文對分形多孔介質中斐克擴散、和壓力彌散和熱傳導過程進行了全面和系統的分析。 -
Take the liquid - liquid transient mass diffusion for granted, experiments on fast transient mass diffusion between a nacl solution and pure water was conducted. with the experimental results, the physical mechanism of fast transient mass diffusion was revealed
以液體與液體間的快速瞬態擴散傳質問題為例，對nacl溶液和純水快速接觸的瞬態擴散傳質問題進行了實驗研究，根據實驗結果，揭示了快速瞬態分子擴散過程中質量傳遞物理機制。
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