在组分分析的基础上，采用立方型状态方程建立了计算原油体积系数的新方法。

Based on the component analysis, a new calculation method for the volume factor of formation crude oil was proposed by cubic equation of state.

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这个新的立方型状态方程是目前计算水的相平衡参数和饱和湿空气性质较好的数学模型。

This new cubic type of status equation currently represents a relatively good mathematical model for calculating the phase equilibrium parameters of water and the properties of saturated humid air.

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又从另一侧面验证了所提出的刚体状态方程确能较好地代表实际流体分子的斥力项，为开发较好的立方型方程提供了参考。

This, from another aspect, confirms that the proposed hard-body equation of state represents repulsive pressure term of cubic equation of state for real liquids with good precision.

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又从另一侧面验证了所提出的刚体状态方程确能较好地代表实际流体分子的斥力项，为开发较好的立方型方程提供了参考。

This, from another aspect, confirms that the proposed hard-body equation of state represents repulsive pressure term of cubic equation of state for real liquids with good precision.

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