speed of freezing meaning in English

冻结速度
结速度

So an equation , which calculates the annual times of pavement concrete natural freeze - thaw cycle was developed and the cycle parameters , including temperature decreasing speed of freezing , length of freezing time and lowest freezing temperature were statistically calculated
根据有限差分方法计算得到的我国主要城市铺面混凝土内部年逐时温度，进行了铺面混凝土冻融环境的量化指标统计分析，建立了铺面混凝土年冻融循环次数的预估方程，统计得到各量化指标的分布状况和特徵值。