method of cubic equation 三次方程法
In riser design of steel casting, modulus method is the most widely used method, and the cubic equation method is a most close method in modulus method.
在铸钢件冒口设计中，模数法是一个广泛应用的计算方法，三次方程解析法是模数法中较为严密的计算方法。
Based on the component analysis, a new calculation method for the volume factor of formation crude oil was proposed by cubic equation of state.
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。
Furthermore, a Cubic Curve-fitting equation deduces and set up. In the end, through a group of actual data, the effect of this new method is validated.
建立了三次拟合曲线方程，通过实际数据的检验，验证了该方法的拟合效果。
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