经验方程 meaning in English
empirical equation
observed equation
Examples
- Moreover , there are good fitted power function relationship between thermal conductivity and soil water content , soil water suction and salt concentration . meanwhile , based on the measured data of soil water content and soil temperature distribution under temperature - controlled conditions , according to philip ' s empirical equation , through difference method , the water diffusivity under temperature gradient was calculated , which can be expressed as a power function of temperature
此外，研究表明，导热率与土壤含水率、土壤水吸力、含盐浓度之间均存在良好的幂函数关系；在取得一定温控条件下的土壤水分与温度分布实测资料的基础上，根据philip经验方程，通过差分法计算得出温差作用下的水分扩散率，该参数可表示为温度的幂函数形式。 - The dynamics equations of soil water vaporizing and ammonia volatilizing hcluding the factors of water and temperature , and the dynamics - like equation of urea transforming into ammonium nitrogen in soil are founded in the paper , by taking the effect of interaction of water and temperature as subject , the dynamic change character of object studied as basis and using principle of chemical dynamic ; the empirio - equations of soil water retention curve including temperature and the empirio - equations including temperature between water potential of millet seedling leaves and soil water are founded in order to make the equation of relation between water potential and water content in soil suit the demand of temperature change much better
本文以水热耦合效应为主题，基于研究对象的动态变化特征，应用化学动力学原理，建立了含水、热因子以及水热耦合效应的土壤水分蒸发、肥料氨挥发动力学方程，以及施入土壤中的尿素转化为铵态氮的动力学型方程；为使水势?含水量关系式更好适应变温条件应用的要求，建立了含温度因子直接表征土壤持水曲线的经验方程，以及含温度因子的谷苗叶水势与土壤含水量关系经验方程。 - 5 . the empirio - equations of soil water retention curve including temperature is developed on the basis of the empirio - equations of soil water retention curve without temperature by studying the quantitative relation between water absorption capacity and soil water content . in addition , the empirio - equations including temperature of millet seedling and soil water content is got
5 .通过对不同温度下土壤水吸力与土壤含水量关系的研究，依据土壤持水曲线经验方程e = as一，建立了含温度因子直接表征土壤持水曲线的经验方程e = e ‘ rbt ， s一‘ 。