cubic equation

Inflection Point and the Formula of Extracting Roots on Cubic Equation

拐点和一元三次方程的求根公式

A cubic equation of state for systems containing salts is presented by adding Debye-Huckel electrostatic contribution to the Patel-Teja equation of state.

本文将Debye-Huckel静电作用项增加至Patel-Teja立方型状态方程中，建立了适用于电解质体系的新模型。

The regressive equation of the water vapor permeability and the steam differential is cubic equation and the square of correlation coefficient is 0.719~ 0.973.

对于被测试样，蒸汽压差与透湿量呈三次曲线关系，具有较高的相关性，相关系数的平方为0.719~0.973。

A Two-Parameter Cubic Equation of State

二参数三阶状态方程

A new cubic equation of state

一个新的三次方型状态方程

The field equation for a complex scalar field with a cubic nonlinear term in tour-dimensional Minkowski space is studied. Two classes of exact solutions, corresponding to solutions of plane and spherical waves, are presented.

本文在四维Minkowski空间中对具有立方非线性复标量场方程进行了研究，并给出了场方程的两种精确解，这两种解相当于场的平面与球面波解。

Based on the Galois theory, we know the root solution of real coefficient cubic equation.

由域论的Galois理论，我们知道实系数三次方程有根式解。

With research objective on two closed loop system of DC electromotor, calculative expressions and boundary condition of parameters with cubic equation model are introduced in the paper.

以可控硅直流电动机双闭环系统作为研究对象，给出了三阶模型下的参数计算公式和边界条件。

Investigation of Cubic Equation of State

立方型状态方程的研究

A New Method of Calculating Parameter of Equation in Cubic Equations of State

立方型状态方程参数新算法

A new cubic equation of state for refrigerants is presented in this paper by means of a "hard-sphere fluid" model.

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。

Mixing Rules for van der Waals Type of Cubic Equation of State ⅱ Equation of State-Excess Gibbs Free Energy Model

van der waals型立方状态方程中的混合规则Ⅱ状态方程过量吉布斯自由能模型

I must work out the cubic equation.

我必须解出这道三次方程。

With the curve fit model method, the cubic equation is adopted to fit the experiment data resulting in good effect.

采用曲线拟合建模法，用三次曲线对试验数据进行拟合，经检验拟合效果较好。

A Rigorous Conversion from Geocentric to Geodetic Coordinates Based on the Solution to Univariate Cubic Equation

基于一元三次方程求解的地心坐标至大地坐标的严密变换

Prediction of the volume data of saturated vapors and liquids for organic substances using the cubic equation of molecular aggregation

应用聚集立方型状态方程预测有机物饱和汽、液相体积

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。

A two-parameter hard-body equation of state which can be used in cubic equation of state as a term of repulsive pressure is proposed.

提出了一个简化的二参数刚体状态方程，可用作立方型方程的斥力项。

Least square regression method was used for MTF curve ( at logarithmic axis) fitting with quadratic equation so as or cubic equation to obtain the desired parameters.

用最小二乘法对MTF曲线（对数坐标下）进行二、三次项拟合，求得拟合参数。

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。

A cubic equation which is about y 0 can be founded when the rectangle beam in the purely bended brings about damage.

分析矩形梁纯弯曲受损时可以得到一个现时截面中性轴位置y0和无量纲化弯矩m的关系式，它是一个关于y0的三次方程。

The coefficients of determination ( R~ 2) of fitting curve were 0.21 ± 0.09 ( P < 0.01), so the BMD reference database of Qingdao women were established by cubic regression equation.

拟合曲线的决定系数（R2）为0.21±0.09（P<0.01）。

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。

Researches and applications of cubic equation of state for high pressure phase equilibria

方型状态方程在高压相平衡中的研究及应用

Blind Detection of LSB Steganography Based on a Cubic Equation

基于三次方程的LSB隐藏信息的盲检测

The diversification level and changes in the value of enterprises meet the cubic equation.

研究发现，企业的多元化水平和企业价值的变化，满足三次方程。

Researches of Mixing Rules in Cubic Equation of State for Phase Equilibria

立方型状态方程的混合规则在相平衡计算中的研究

The cubic equation of state ( EOS) has the characteristics of simple forms and higher preci-sion.

立方型状态方程具有型式简单、精度高等特点。

An Improvement on Generalized Cubic Equation of State

改进的总包性立方型状态方程

The F function modified cubic equation of state-FRKS and the improved binary interaction function by introducing the pressure factor, were used to correlate excess volumes of binary mixtures at high pressure.

利用F函数改进的立方状态方程&FRKS方程，并在二元互作用函数中引入压力项因子，对高压下二元系的超额体积进行拟合。