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1·Z It's a cubic equation. There is actually a formula.

这是一个三次方程，事实上是有一个公式可以解出。

2·The questionnaire concludes that the model of quantity is a cubic equation.

调查问卷的统计结果显示，我国大学受赠量模型的一般形式为三次方程式。

3·In this paper, the cubic equation is simplified into a quadratic equation, thus greatly simplifying the calculation.

本文将三次方程简化为二次方程，使计算得到很大简化。

4·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。

5·It is rather complicated to compute the neutral axis in partially pre-stressed concrete beams after cracking, since we have to solve a cubic equation.

计算部分预应力混凝土梁开裂后截面应力时，需求解中和轴高度的三次方程，使计算显得比较复杂。

6·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。

7·This paper discussed an elementary solution to the envelope of a kind of family of curves of which the equation was one of the cubic equations in regard to a parameter.

本文论述曲线族的方程为关于参数的三次方程时，其包络曲线方程的初等求法。

8·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.

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。

9·Applying the operation on three ary number, we got the formula that was applied to seeking the roots of normally cubic equation, and proved that the result is consistent with Cardans formula.

应用三元数运算，推导得到了一般三次代数方程的求根公式，结果证明与卡尔丹公式是一致的。

10·Based on the definition of sensitive actual stage a cubic equation was derived and solved for the liquid compositions on the sensitive actual stages for the rectifying and stripping sections.

从灵敏实际级的定义出发，导出一个立方型方程，解此方程得出精馏段和提馏段的灵敏实际级上的液相组成。