In other coordinates it will involve second and possibly first derivatives with respect to time . 在别的坐标系中，它除了包含对时间的二阶微商外，还可能会包含对时间的一阶微商。
2.
3 ) a novel martensitic transformation kinetics model for sma is proposed based on the phenomenological description of the martensitic transformation heat flow - temperature curve and on the linear relationship between the partial derivatives with respect to the temperature of martensite fraction and of gbbis free energy . numerical simulations by utilizing the proposed model are closer to experimental results than those from other models 3 )基于对马氏体相变热流-温度实验曲线的唯象模拟，以及马氏体体积分数与热力势对温度偏导数之间的线性关系，建立了一种新的马氏体相变动力学模型，并与其他模型及实验结果进行了比较。
