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diffusion medium
相关语句
  扩散介质
     The former is a dynamic parameter controlled by dsorption speed,gas desorption quantity and methane output,borehole pressure drop,etc. The latter is a static parameter which is affected by diffusion matter property,diffusion medium character,the temperature,pressure,pore surface texture and shape in diffusion system,etc.
     前者为由解吸速度、解吸气量和煤层气产量、井孔压力降等因素控制的动态参数,而后者为主要受扩散物质性质、扩散介质特征、扩散系统的温度、压力和孔隙结构形态等因素影响的静态参数。
短句来源
  扩散中介
     There is a game relationship among government, diffusion medium and the farm households during the diffusion processes of agricultural technology achievement.
     在农业技术成果扩散的过程中,政府、扩散中介、农户之间存在着博弈关系。
短句来源
     Through the game analyses between government and diffusion medium, diffusion and the farm households, the authors think the game phenomenon existed in possessors and users in agricultural new technology can finally impel agricultural technology constantly development and widely use.
     通过对政府和扩散中介扩散中介和农户之间的博弈分析,认为农业新技术的拥有者和使用者之间的博弈现象,最终将促进农业技术的不断优化和广泛使用。
短句来源
  相似匹配句对
     Reflections on the Commercial Medium of Cultural Diffusion
     文化传播的商贸媒介思考
短句来源
     Anomalous Diffusion in Fractal Porous Medium
     分形多孔介质中的奇异扩散
短句来源
     sensitivity:medium;
     灵敏度:中; 线性化参数:SX=3。
短句来源
     sensitivity:medium;
     灵敏度 :中 ;
短句来源
     Nonlinear Diffusion
     非线性扩散
短句来源
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  diffusion medium
Solid and liquid copper were used as a diffusion medium for tungsten to migrate to the surface of the graphite fibers at elevated temperature to form carbides.
      
The model results in a strong dependence of diffusivity on the melting point and elastic moduli of the diffusion medium (oxide scale).
      
A wide range of nitrogen-saturating atmospheres has been developed for this purpose, with each diffusion medium characterized by special process properties.
      
The effect of a bounded interplanetary diffusion medium on the propagation of solar flare cosmic rays
      
The positive and negative deviations observed at higher and lower concentrations, respectively, are explained in terms of relative contributions of various types of effects occuring in the diffusion medium.
      
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The Geo-system is an open and complicated system. This complexity origins from the geographic environment including natural environment and economic environment. However geographic space is a nonhomogeneos space. Furthermore.the nonhomogeneity of regions exists so absolutely that innovation diffusion in geo-system is restricted by geographic environment,as there is a great deal of differences between regions which have different natural,economic and social qualities.Then, there is no doubt that the diffusion...

The Geo-system is an open and complicated system. This complexity origins from the geographic environment including natural environment and economic environment. However geographic space is a nonhomogeneos space. Furthermore.the nonhomogeneity of regions exists so absolutely that innovation diffusion in geo-system is restricted by geographic environment,as there is a great deal of differences between regions which have different natural,economic and social qualities.Then, there is no doubt that the diffusion process of any innovation is in nonhomogeneos space.Spatial diffusion relates to not only distance but also nonhomogeneity of regions.A significant body of spatial diffusion theory was formed as a result of the work of T.Hagerstrand and others. Spatial diffusion research is of importance in understanding the spread of diseases, ideas,business, products and people from initial origins through time and space. But. existent diffusion models have been found to be parsimonious and inflexible in solving practical problems, because the T.Hagerstrand's models were based on the homogeneos space and the diffusion of geographic environment was ignored. It is considered that innovation is composed of infinite and noncontinuous small diffusion medium and the third dimension is included in space due to nonhomogeneity in this paper.We transfer the movement of innovation in two-dimensional space into a great deal of random medium movement in three-dimensional space.The random movement may be described by the Kolmogorov diffusion equation. By means of the spatial diffusion equation, we can derive the centers of isotropic diffusion,anisotropic diffusion, multiple diffusion and the dynamic diffusion equation in nonhomogeneos space.

地理系统的复杂性,导致不同地域地理环境存在差异,革新空间扩散的过程与行为将受控于地域的非物质性,从而在均质条件基础上的扩散模型与实际情况有较大出入。本文从非均质空间来考虑,将革新在客观现实中的二维平面运动转换为沿平面方向与地域自然、社会和经济综合质量方向的三维随机运动,由此总结出非均质空间条件下,革新的各向同性、各向异性、多源及动态扩散方程式。

The diffusion of coalbed methane in coal reservoirs is defined that the main process of coalbed methane desorbed from coal matrix pore surface migrated to cleat system. The premise of the diffusion is the gas concentration gradient. The important parameter of determining diffusion capability is diffusion coefficient. The former is a dynamic parameter controlled by dsorption speed,gas desorption quantity and methane output,borehole pressure drop,etc. The latter is a static parameter which is affected by diffusion...

The diffusion of coalbed methane in coal reservoirs is defined that the main process of coalbed methane desorbed from coal matrix pore surface migrated to cleat system. The premise of the diffusion is the gas concentration gradient. The important parameter of determining diffusion capability is diffusion coefficient. The former is a dynamic parameter controlled by dsorption speed,gas desorption quantity and methane output,borehole pressure drop,etc. The latter is a static parameter which is affected by diffusion matter property,diffusion medium character,the temperature,pressure,pore surface texture and shape in diffusion system,etc. The diffusion quantity of coalbed methane in coal reservoirs signifies direct ratio with methane concentration gradient and diffusion coefficient.

煤层气在煤储层中的扩散是指从煤基质孔隙表面上解吸的煤层气运移到割理系统的主要过程。发生扩散的前提条件是气体浓度差的出现,衡量扩散能力大小的重要参数是扩散系数。前者为由解吸速度、解吸气量和煤层气产量、井孔压力降等因素控制的动态参数,而后者为主要受扩散物质性质、扩散介质特征、扩散系统的温度、压力和孔隙结构形态等因素影响的静态参数。煤层气在煤储层中的扩散量与煤层气浓度差和扩散系数呈正比关系。

Objective: To investigate the in vitro percutaneous absorption and skin-intake of conjugated linoleic acid(CLA) and its ethyl ester(CLAE). Methods: The components of CLA and CLAE samples were analyzed by GC-MS, detecting wavelength of 233 nm was confirmed by UV, where the standard curve was prepared, 30% alcohol solution was used as receiving solution and an improved Franz diffusion cell was adopted to test the in vitro permeability of CLA and CLAE solutions through nude mouse skin. Results: After 10 h...

Objective: To investigate the in vitro percutaneous absorption and skin-intake of conjugated linoleic acid(CLA) and its ethyl ester(CLAE). Methods: The components of CLA and CLAE samples were analyzed by GC-MS, detecting wavelength of 233 nm was confirmed by UV, where the standard curve was prepared, 30% alcohol solution was used as receiving solution and an improved Franz diffusion cell was adopted to test the in vitro permeability of CLA and CLAE solutions through nude mouse skin. Results: After 10 h the skin-intakes of CLA and CLAE in varied diffusion mediums were obvious, and the intake of CLA was more than that of CLAE under the same conditions. When PG used as diffusion medium, a few CLA permeated the skin, but CLAE had hardly permeation. Azone restrained the permeation of CLA while enhanced the skin-intake of CLA. The skin-intakes of the 2%CLA and 2%CLAE ointments almost reached saturation in 3 h and the skin-intake of CLA in 24 h was less than that of CLAE. Conclusion: It is suggested that CLA and CLAE could be used for topical preparations.

目的:考察共轭亚油酸及其乙酯的体外透皮和皮肤摄取特性。方法:通过气相色谱-质谱法分析共轭亚油酸及其乙酯试样的成分;用紫外分光光度法确定测定波长为233nm,并且制备标准曲线;选择30%乙醇溶液作为接受液,采用改进的Franz透皮扩散仪对用试样配制的各扩散液进行裸鼠皮肤体外渗透实验。结果:共轭亚油酸及其乙酯在各扩散介质中于10小时内可导致显著的皮内摄取,并且共轭亚油酸的皮内摄取量大于其乙酯;以丙二醇作溶剂,共轭亚油酸可以透过皮肤,而其乙酯几乎无透过;氮酮能抑制共轭亚油酸的透皮吸收,但可促进其皮内摄取。以2%共轭亚油酸或其乙酯软膏作为扩散物,至3小时便几乎致皮内摄取达饱和,且24小时内共轭亚油酸的皮内摄取量小于其乙酯。结论:共轭亚油酸及其乙酯可用于局部制剂。

 
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