1) Soil thermal diffusivity
土壤热扩散率
1.
For the characteristics of urban boundary layer and energy budget,experiments were carried in Hefei and Nanjing city during the summer of 2004,and values of the soil thermal diffusivity v_g were obtained.
为了获得城市边界层能量特征,于2004年7～8月分别在合肥、南京两地采集土壤温度数据,并分析获得两地的土壤热扩散率v_g。
2.
A method coupled thermal conduction and convection,first proposed by Zhiqiu GAO,to determing the accurate values of soil thermal diffusivity and liquid water flux density is introduced,using this method we determined the soil thermal diffusivity,k=0.
利用临汾市基本气象观测站的土壤温度资料,采用同时考虑热传导和热对流的土壤温度算法研究了临汾市的土壤热扩散率和液态水通量密度。
2) soil water diffusivity
土壤水分扩散率
1.
Establishing and application on single parameter model of soil water diffusivity in Nanxiaohegou basin
甘肃南小河流域土壤水分扩散率单一参数模型的建立及应用
2.
Unsaturated soil water diffusivity is a necessarily basal parameter to study soil water movement laws and quantificationally analyze soil water movement with method of mathematical simulation.
非饱和土壤水分扩散率是研究土壤水分运动规律必不可少的基本参数之一。
3) soil water diffusion
土壤水扩散率
1.
Based on the soil of runoff plot in the loess hilly areas,the soil hydraulic properties have been measured,which are the soil water retention curve,soil water diffusion and soil water conductivity.
利用土壤水动力学原理 ,以陕西长武黄土沟壑区径流小区土壤为材料 ,用离心机法、水平土柱渗吸法及公式推导法分别对径流小区土壤水分运动参数 (土壤水分特征曲线、土壤水扩散率、土壤导水率 )进行测定 ,结果表明 :土壤水分特征曲线符合指数关系曲线 ,土壤水扩散率符合抛物线形式以及土壤导水率的表达式。
4) unsaturated soil water diffusivity
非饱和土壤水扩散率
1.
his paper discusses the unsaturated soil water diffusivity of lateritic red earth and its effect factors in South China.
对华南赤红壤非饱和土壤水扩散率及其影响因素进行了研究。
2.
The method of horizontal earth column was used to study the unsaturated soil water diffusivity of three seashore saline soils.
本试验采用水平土柱法对三种滨海盐渍土的非饱和土壤水扩散率进行的研究结果表明:三种土壤的非饱和土壤水扩散率变化于0。
5) diffusion of soil
土壤扩散度
6) thermal diffusivity
热扩散率
1.
The measuring thermal diffusivity of film materials by laser photoacoustic backing exciting technique;
利用激光光声技术测量薄膜材料的热扩散率
2.
Theoretical study on thermal diffusivity measurement of semi-transparent materials by the flash method;
闪光法测量半透明材料热扩散率的理论研究
3.
Measurement of thermal diffusivity of SiO_2 thin films using AC calorimetric method;
交流量热法测量SiO_2薄膜的热扩散率
补充资料：热扩散率
热扩散率
thermal diffusivity
rekUOSQnlU热扩散率(thermal diffusivity)物体在加热或冷却过程中，各部分温度趋向一致能力的特征参数。又称导温系数。热扩散率a是一个综合参数，a一刀Pc户，单位mZ/s，式中p为材料的体积质量，又为热导率，‘，为定压质量热容。它用来说明不稳定导热过程中温度变动速度的特征。材料的a值越高，则在同祥的外部加热或冷却条件下，材料内部温度的传播速度越大。各点的温差就越小。a是不稳定传热过程的热分析和计算的重要参数。间歇式窑炉窑墙温度分布和蓄热量计算;隧道窑的窑车蓄热量计算都需要用到耐火材料的热扩散率。热扩散率的测量采用非稳态法，常用激光脉冲法。仪器的测量原理是:在一个四周绝热的薄圆片试样的正面，辐照一束垂直于试样正面的均匀的激光脉冲，试样被单面加热，测出在一维热流条件下试样背面的温升曲线，计算求得热扩散率值。 (汪厚植)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条