双曲线

Particle Swarm Optimization is adopted to detect parameter pattern e.g. circle, ellipse, hyperbola and asymptote.

我们采用一种以粒子群演算法Particle Swarm Optimization 为基础的方法，用来侦测一张影像上的参数图形(如：圆、椭圆、双曲线与双曲线的渐近线)的参数。

In a special case when the boundary is perpendicular to one asymptotic line of the hyperbola, phase matching can not be achieved unless the 1DLHM is regarded intrinsically lossy.

在具有双曲线色散特性的一维各向异性异向介质界面上，当双曲线的渐近线垂直于界面时，平面波的折射反射行为只有在介质被考虑为有损的情况下才能得到合理的解释。

Shaped like a biconvex lens.Of, relating to, or having the form of a hyperbola.

双曲线的属于双曲线的，与之有关的，或有双曲线形状的

The locus of the centers of curvature of a given curve .

双曲线的属于双曲线的，与之有关的，或有双曲线形状的

As the equation of the curve determined by companion centers shows, our main result is that the set of all companion centers of a nonisosceles triangle is the unique equilateral hyperbola, called the hyperbola of , passing through the vertices ,, and the barycenter of .

透过伴心轨迹方程式我们得到主要结果如下：非等腰三角形的伴心所成的集合是一个通过三顶点、、及重心唯一的等轴双曲线，称为的双曲线。

Of, relating to, or having the form of a hyperbola .

双曲线的属于双曲线的，与之有关的，或有双曲线形状的

Hyperbolic cosine.

直角双曲线，等轴双曲线

The similar drawing of the hyperbolic line is argument according to my experience with teaching, which is on the head surfaces of hex nut and used in the engineering drawings, through building three-dimensional model in AutoCAD.

本文通过在AutoCAD中建立三维虚拟对比模型，探讨了工程图样中六角螺母和六角螺栓头部外表面双曲线在计算机辅助设计中的近似画法问题。通过对比，论证了样条曲线替代圆弧近似双曲线改进画法在计算机绘图中的合理性和优越性。

In this chapter, based on six integral of hyperbolic motion, we gave the analytical solution for the satellite's motion perturbed by the oblateness of the primary and numerical examples were also given to prove the accuracy.

文中给出了无摄情况下双曲线轨道的基本关系式，受摄情况下双曲线运动对应的摄动运动方程，以及在目标天体扁率摄动影响下双曲线轨道变化的分析解。

The advan tages and disadvantages of using the normal equations to fit a hyperbola were an alyzed. The hyperbola fitted by SVD was used to express the change of the laser beam's width, and the rules for estimating the goodnessoffit were offered. The fitting precisions of hyperbolas fit with the normal equations and the SVD were compared.

通过分析激光光束质量参数测量中应用正规方程组拟合双曲线的优缺点，给出采用奇异值分解拟合激光光束束宽变化双曲线的拟合优度判断方法，并对比了奇异值分解和正规方程组两种双曲线拟合方法的拟合精度。

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。