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研究了吸纯Ｏ２排Ｎ２和环境压力降低排Ｎ２的脱饱和过程以及环境压力升高溶解Ｎ２的再饱和过程，发现三个过程共同遵循着指数规律变化并建立了相应的数学模型，对减压病的预测和防护进行了理论探讨。其数学表达式为：ｖ＝ｖ＋（ｖ。－ｖ）ｅ－ｂｔ，ｖ表示ｔ时刻体内Ｎ２含量，ｖ。为初始稳定状态Ｎ２含量饱和值，ｖ为到达的终止稳定状态Ｎ２含量饱和值，ｂ为常数。其微分方程式为ｄｖ／ｄｔ＝－ｂ（ｖ－ｖ），表示某时刻体内Ｎ２的变化速率同Ｎ２含量瞬时值与到达终止状态的饱和值之差成正比。在利用文献中的实测结果确定出常数值以后，利用数学表达式计算出某时刻体内的Ｎ２含量和达到某Ｎ２含量所需时间。这一模型对航空、航天和航海中减压病的防护均有实际意义。
The desorption process of purifying pure O2 and N2 with decreasing ambient pressure and the process of resaturation of dissolved N2 with increasing ambient pressure were studied. The three processes all followed the exponential law and established the corresponding mathematical model. Disease prediction and protection were discussed theoretically. Its mathematical expression is: v = v + (v.-v) e-bt, v represents the body N2 content at time t, v. For the initial steady state N2 content saturation value, v is the steady state reached the end of the steady state N2 content saturation, b is a constant. The differential equation is dv / dt = -b (v-v), which means that the rate of change of N2 in a body is proportional to the difference between the instantaneous value of N2 content and the saturation value at the termination state. After using the measured results in the literature to determine the constant value, the mathematical expression is used to calculate the N2 content at a certain moment and the time required to reach a certain N2 content. This model is of practical significance for the protection of decompression sickness in aviation, spaceflight and navigation.