The average retardation time τo was determined from the single Kelvin model.
采用单一的开尔文（Ｋｅｌｖｉｎ）模型确定被测材料的平均推迟时间，用适当选取各运动单元推迟时间的方法建立四参数数学模型ε＝∑ε２ｉ（ｌ－ｅ－ｔ／τｒｉ），并以最小二乘法拟合求得各待定参数。
Methods The differential equation is derived from the construction of Three Parameters Model,which is utilized to analyze the relaxation,creep,relaxation time and retardation time.
通过三参数固体模型的几何构型来推导其运动微分方程,利用其微分方程分析此模型的应力松弛过程、蠕变过程、以及反映弹性和粘性相结合的应力松弛时间和蠕变推迟时间。
The time-dependent Green s function of d Alembert s equation and retarded potentials;
d’Alembert方程的含时Green函数和推迟势
By Employing the retarded potential in calculating sound pressure in the pulse -wave sound field.
用推迟势计算了脉冲波声场的声压公式,克服了Fourier分析中对频率求和的困难。
Solving the Green s functions of electromagnetic potential equations in moving medium,the retarded potentials in unlimited space are obtained.
求解了运动媒质中电磁势方程的格林函数，给出了无界空间的推迟势。