二次方程

An algebraic equation of the fourth degree.

有关二次方程式的代数分支。

A curve on a surface of revolution, formed by the intersection of the surface with a plane containing the axis of revolution.

二次曲面的由二次方程式所定义的几何平面的，或与其有关的

See a binomial equation as a game of Plink-O.

将二次方程视作Plink-0这个游戏。

By analytic geometry method and solving quadratic equation,a computer simulation algorithm of digital projection under arbitrary scanning locus was proposed.The algorithm is based on the rules of attenuation of monochromatic X-rays.Through mathematical modeling and computer simulation,digital projections of ellipsoid and cylinder in circular and helix scanning modes are exemplified respectively,which are proved to be correct by FDK and PI-line reconstruction algorithms.

介绍了一种利用解析几何和求解二次方程仿真任意扫描轨迹下的锥束射线投影数据算法，该方法基于单色射线贯穿物体的衰减理论，通过数学建模与计算机仿真，给出了椭球、圆柱两种典型模型分别在单圆、螺旋线扫描轨迹下的投影数据仿真结果，并利用FDK和PI线重建算法进行验证，证明了该种数值仿真方法的正确性。

The way of working out the problem of taking two line segments as the root of an equation is to link up monodic quadratic equation directly with geometry and establish the connection between them.

以两线段长为一元二次方程的根的问题的解法，是把一元二次方程与几何问题直接挂钩，沟通了几何与二次方程之间的联系。

The way of working out the problem of taking two l segments as the root of an equation is to link up monodic quadratic equation directly with geometry and establish the connection between them.

以两线段长为一元二次方程的根的问题的解法，是把一元二次方程与几何问题直接挂钩，沟通了几何与二次方程之间的联系。

Zeros of linear polynomials with real efficients are the real solutions of the original polynomial equation.

5四元数二次方程的显式解：利用改进的新方法完全可以得到二次方程解的显式表示以及关于解的具体情况的一些充分必要条件。

The branch of algebra that deals with quadratic equation.

二次方程式论处理二次方程式的代数分支。

For instance, in order to use the quadratic formula you must have the quadratic in standard form first.

例如，要运用二次方程你首先得懂得二次方程的标准格式。

From quintics on up, one requires more powerful methods if a general algebraic solution is sought, as explained under quintic equations.

因此找到一个通式解法或运算法则(就像二次方程那样，能解所有的一元二次方程)是很有用的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。