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将ＤＳＦＤ优化方法引入状态方程的拟合中，在Ｌｙｄｅｒｓｅｎ修正的两参数普遍 化数据表的基础上，关联出Ｚｃ为０．２７流体的通用状态方程和饱和蒸气压方程，并由此 导出了其他热力性质的解析表达式。在０．５≤Ｔｒ≤１５及０．０１≤Ｐｒ≤３０的广泛范围内， 在偏差函数的计算精度及连续性方面，均比Ｌｙｄｅｒｓｅｎ数据表有较大改进，并且编制了计 算程序．编绘了热力性质两参数统一通用计算图。可方便地同时确定密度、各种偏差函 数、焓差、熵差、内能差、焓 、内能 及其组成部分热 及机械同等热力参数。
The DSFD optimization method is introduced into the equation of state fitting. On the basis of Lydersen modified two-parameter universal data table, the general equation of state and the saturated vapor pressure equation of Zc = 0.27 are derived, and the other Analytical Expressions of Thermodynamic Properties. In the wide range of 0.5≤Tr≤15 and 0.01≤Pr≤30, both the accuracy and the continuity of the deviation function are greatly improved compared with the Lydersen data table, and the calculation program is prepared. A two-parameter general-purpose calculation diagram of thermodynamic properties was compiled. Density, various deviation functions, enthalpy difference, entropy difference, internal energy difference, enthalpy, internal energy and its constituent heat and mechanical equivalent thermal parameters can be conveniently and simultaneously determined.