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gem方程
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  gem equation
    Fitting the experimental data into the general effective media (GEM) equation, a theoretical percolation curve was gained. A mathematical model was proposed which is based on the GEM equation and the dilution effect of filler volume fraction due to thermal volume expansion.
    使用有效介质普适方程(GEM方程)对实验数据进行拟合,得到导电复合材料的理论渗流曲线,根据GEM方程和基体的体积膨胀,建立起一个数学模型。
短句来源
    This process has potential to excellent performance PTCR. By research on the relation between resistivity and metal volume fraction of composites, it is concluded that Ni particles and (Ba,Sr)TiO3 particles are even distributed in composites which resistance pattern is series & parallel one and agrees with GEM equation.
    通过研究复合材料的电阻率和金属的体积分数的关系,得到如下结论:金属Ni和(Ba,Sr)TiO3陶瓷的复合属于两相物质颗粒态的均匀混合,其电阻混合方式是混联模式,符合GEM方程,电阻率可通过下式近似的估算:。
短句来源
    The electrical conductivity of v2o3-polymer composites were studied by examining the dependence of resistivity(conductivity)on the volume fraction of v2o3.The experimental data(ρm vs Φ)were fitted using computer to GEM equation to a satisfactory accuracy.
    研究了V2O3/聚合物复合材料的导电特征。 采用GEM方程对实验数据进行计算机拟合,结合电镜照片详细地分析了拟合参数Φc,t及LΦ,Lf的物理含义。
短句来源
    Regression results show that parameter t and A in GEM equation increase with the augment of the ratio of the dielectric constants of the two phases.
    结果表明:GEM方程中的拟合参数t和A随介电常数比的增大而增大;
短句来源
    It is concluded by GEM equation that the total resistance of the composite made of metal particles and ceramic particles almost agree with the series and parallel circuit rule, which can be calculated from the e-quation,.
    通过引入GEM方程,分析相关的数学模型和实验数据,得出了:复合材料中,金属与陶瓷的电阻混合方式为近似的混联模式,电阻率符合如下公式:。
短句来源
  gem equation
    Fitting the experimental data into the general effective media (GEM) equation, a theoretical percolation curve was gained. A mathematical model was proposed which is based on the GEM equation and the dilution effect of filler volume fraction due to thermal volume expansion.
    使用有效介质普适方程(GEM方程)对实验数据进行拟合,得到导电复合材料的理论渗流曲线,根据GEM方程和基体的体积膨胀,建立起一个数学模型。
短句来源
    This process has potential to excellent performance PTCR. By research on the relation between resistivity and metal volume fraction of composites, it is concluded that Ni particles and (Ba,Sr)TiO3 particles are even distributed in composites which resistance pattern is series & parallel one and agrees with GEM equation.
    通过研究复合材料的电阻率和金属的体积分数的关系,得到如下结论:金属Ni和(Ba,Sr)TiO3陶瓷的复合属于两相物质颗粒态的均匀混合,其电阻混合方式是混联模式,符合GEM方程,电阻率可通过下式近似的估算:。
短句来源
    The electrical conductivity of v2o3-polymer composites were studied by examining the dependence of resistivity(conductivity)on the volume fraction of v2o3.The experimental data(ρm vs Φ)were fitted using computer to GEM equation to a satisfactory accuracy.
    研究了V2O3/聚合物复合材料的导电特征。 采用GEM方程对实验数据进行计算机拟合,结合电镜照片详细地分析了拟合参数Φc,t及LΦ,Lf的物理含义。
短句来源
    Regression results show that parameter t and A in GEM equation increase with the augment of the ratio of the dielectric constants of the two phases.
    结果表明:GEM方程中的拟合参数t和A随介电常数比的增大而增大;
短句来源
    It is concluded by GEM equation that the total resistance of the composite made of metal particles and ceramic particles almost agree with the series and parallel circuit rule, which can be calculated from the e-quation,.
    通过引入GEM方程,分析相关的数学模型和实验数据,得出了:复合材料中,金属与陶瓷的电阻混合方式为近似的混联模式,电阻率符合如下公式:。
短句来源
  “gem方程”译为未确定词的双语例句
    AC impedance spectroscopy was used to evaluate the DC conductivity of Portland cement mortar and silica fume containing cement mortar with single sized graphite as aggregate.
    采用交流阻抗谱方法,测定了以单粒级石墨为集料配制的系列硅酸盐水泥砂浆和含15%硅灰水泥砂浆的电导率. 砂浆电导率与集料体积分数的关系可以用GEM方程拟合.
短句来源
    quantitative analysis on the PTC effect of metal-ceramic composites is made with theeffective media theory. By the general effective media(GEM) equation for metal-ceramic twophase system,the conductivity of the composite medium(σm)as a function of the conductivi-ty of the two phases(σ1 and σh)is derived and found to be in fairly good agreement with thatobtained experimentally and other relevant dat.
    用有效介质理论对金属-陶瓷复合材料的PTC效应进行定量分析,通过将GEM方程应用于金属-陶瓷二相复合系统的电导率分析,发现所得到的方程与实验结果及有关工作基本相符。 从而探明了提高金属-陶瓷复合材料的PTC效应的有效途径。
短句来源
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  gem equation
Preliminary models, also based on the GEM equation, are used to describe the positive temperature coefficient of resistivity (PTC) and the piezoresistivity (uniaxial pressure) of the composite when the composition is near the percolation threshold.
      
The experimental data (ρm versus φ) were fitted (using a computer program) to the GEM equation with satisfactory accuracy.
      
The experimental data can be well fitted to the GEM equation.
      
The ac conductivity of silicon-polyester resin composites is found to be best fitted using the two exponent phenomenological percolation equation (TEPPE) (formerly known as the general effective media (GEM) equation).
      
The two fitting parameters in the GEM equation are rh and k.
      


The electrical conductivity of v2o3-polymer composites were studied by examining the dependence of resistivity(conductivity)on the volume fraction of v2o3.The experimental data(ρm vs Φ)were fitted using computer to GEM equation to a satisfactory accuracy. The critical volume fration Φ c and other parameters,t,σh and σ1 evaluted by fitting,and LΦ and Lf,calculated after fitting were analysed by taking into account the geometry,the orientation and the arrangement of two components.The physical meanings of LΦ,Lf...

The electrical conductivity of v2o3-polymer composites were studied by examining the dependence of resistivity(conductivity)on the volume fraction of v2o3.The experimental data(ρm vs Φ)were fitted using computer to GEM equation to a satisfactory accuracy. The critical volume fration Φ c and other parameters,t,σh and σ1 evaluted by fitting,and LΦ and Lf,calculated after fitting were analysed by taking into account the geometry,the orientation and the arrangement of two components.The physical meanings of LΦ,Lf and t were further illustrated on the basis of their definitions.

本文通过考察电阻率与V2O3体积分数的关系。研究了V2O3/聚合物复合材料的导电特征。采用GEM方程对实验数据进行计算机拟合,结合电镜照片详细地分析了拟合参数Φc,t及LΦ,Lf的物理含义。研究发现,随着填料粒径、基体种类和复合方式的不同,临界体积分数Φc便不同,GEM方程能够准确地描述该复合材料电阻率与V2O3体积分数的关系,其中参数LΦ,和Lf具有非常特定的物理意义,它们分别由导电填料(V2O3)和聚合物基体的几何特征、取向状态和配置方式决定,而Φc、t则是导电填料和基体互相作用的综合反映。

quantitative analysis on the PTC effect of metal-ceramic composites is made with theeffective media theory.By the general effective media(GEM) equation for metal-ceramic twophase system,the conductivity of the composite medium(σm)as a function of the conductivi-ty of the two phases(σ1 and σh)is derived and found to be in fairly good agreement with thatobtained experimentally and other relevant dat.

用有效介质理论对金属-陶瓷复合材料的PTC效应进行定量分析,通过将GEM方程应用于金属-陶瓷二相复合系统的电导率分析,发现所得到的方程与实验结果及有关工作基本相符。从而探明了提高金属-陶瓷复合材料的PTC效应的有效途径。

AC impedance spectroscopy was used to evaluate the DC conductivity of Portland cement mortar and silica fume containing cement mortar with single sized graphite as aggregate. The experimental conductivity against aggregate volume fraction data were fitted accurately to GEM equation with two percolation morphology parameters, critical aggregate volume fraction φ hc and an exponent t , which are 0.38 and 1.48~1.68 respectively. The fitted critical volume fraction differs from that deduced from the...

AC impedance spectroscopy was used to evaluate the DC conductivity of Portland cement mortar and silica fume containing cement mortar with single sized graphite as aggregate. The experimental conductivity against aggregate volume fraction data were fitted accurately to GEM equation with two percolation morphology parameters, critical aggregate volume fraction φ hc and an exponent t , which are 0.38 and 1.48~1.68 respectively. The fitted critical volume fraction differs from that deduced from the site percolation threshold, and the exponent is hydration time dependent. It is concluded that the partial wetting of aggregate particles by cement paste and the existence of transition zone are responsible for the effect on these two GEM equation parameters.

采用交流阻抗谱方法,测定了以单粒级石墨为集料配制的系列硅酸盐水泥砂浆和含15%硅灰水泥砂浆的电导率.砂浆电导率与集料体积分数的关系可以用GEM方程拟合.GEM方程拟合得到的两个参数———渗流临界体积分数φhc和指数t分别为0.38和1.48~1.68.针对拟合得到的临界体积分数与按点渗流阈值所得到的临界体积分数的差异和指数的时间依赖性,讨论了水泥浆体对集料的包裹及过渡区对GEM方程参数的影响

 
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