双曲线

The shape formed by projection of correlation line of rotative surface on which two axises Intersect by meahs of analytical method is discussed,and some related characterlstles of hyperbolic curve ,on the basis of which are given some ideas about making a drawing by correlationline projection are analysed and the actual drawing process is illustrated.

用解析法探讨了两轴线相交的回转面的相贯线投影的形状，分析了双曲线的一些相关特性，在此基础上给出了相贯线投影作图的新思路；利用实例说明了具体的作图过程。

Parameters of DengKen-Zhang hyperbola model ; superunit transformation method

路堤沉降；邓肯－张双曲线模型参数；超单元变换法

In recent years, the company has completed 125 MW power plant in Sichuan Minjiang River unit, 125 MW unit of Pingdingshan in Henan, Shaanxi water-power plants of 300 MW Unit, Chengdu, Sichuan Wayao three 55 MW power plant unit of the overall task of construction and the construction of the Sichuan, Chongqing, Guizhou, Henan, Guangxi, Guangdong, Fujian, Hunan, and so a large number of 1,200 square meters to 10,000 square meters of hyperbolic cooling towers, 60 ~ 240 M Xin, such as its smoke 50 cigarettes or tower construction, construction output in 2003 from the 21000000-2004 years 55 million, from 2005 the 110000000-2006年230 million for four consecutive years of double the rate of increase has created one after another miracle!

近年来，公司先后完成四川岷江电厂125MW机组、河南平顶山125MW机组、陕西清水川电厂300MW机组、四川成都三瓦窑电厂55MW机组的整体建筑工程施工任务，并承建了四川、重庆、贵州、河南、广西、广东、福建、湖南等一大批1200㎡～10000㎡的双曲线冷却塔，60～240M烟囟等其计50座烟塔的施工，施工产值从2003年的2100万到2004年的5500万，从2005年的11000万到2006年23000万连续四年翻倍的速度递增，创造了一个又一个的奇迹！

But impact of interest rate on asset allocation attenuates in hyperbolic way when the plan horizon comes near.

所以，利率风险是通过现金和债券进行管理；但是随着期末的临近，利率对于资产配置的影响呈双曲线方式递减。

A new algorithm for representing conies precisely is presented using the periodic NURBS. The algorithm requires only four control vertices to represent a full circle using a circumscribing square.

本文探讨了用2次周期性NURBS表示闭合圆锥曲线的方法，导出了精确表示椭圆、抛物线和双曲线的条件，并给出了精确表示圆弧的充要条件；提出了用2次NURBS精确表示圆的新方法。

By the detail discussion onthe hardware of the smooth path control system of single-chip microcomputer developed and the system software including new type continuous smooth path software, the analyzing of international standard program languageISO andthe attempt to developmental application in the smooth path control systemand experiment have been done, the description of the smooth path of the non-circular curive such as ellipse, hyperbola, parabola and their realignment has been realized by the way directly to input their parameters. The correctnesson the priciple and the method of the continuous smooth path control and the forthright on programing method hayed been proved by the experiment, new way to realize higher accracy continuous smooth path control has been developed.

通过对所研制成功的单片微机平滑轨迹控制系统硬件和包括新型的连续平滑轨迹生成软件在内的系统软件的详细描述，进行了国际通用标准编程语言△ISO标准编码的分析和在平猾轨迹控制系统中扩展应用的尝试和实验，实现了椭圆、抛物线、双曲线等非圆曲线及其组合的直接参数输入的平滑轨迹轮廓描述，并通过实验证明了连续平滑轨迹控制原理及方法的正确性和程序编制的简捷性，为实现高精度连续平滑轨迹控制开辟了一条新的途径。

The purpose of this thesis is to study the theory of hyperbolas of triangles.

摘要 本论文是在研究三角形的双曲线的理论。

Usually Hough transform was used to detect lines, circles, ellipses, and hyperbolas in an image.

Hough transform 通常用来侦测影像中的直线、圆、椭圆、和双曲线。

Now according to Newtonian theory, some of them moved in hyperbolas or parabolas never to return; others moved in ordinary ellipses.

现在，牛顿理论认为，有一些彗星沿双曲线或抛物线运行，永远不再返回；另外一些彗星沿普通的椭圆轨道运行。

Simulated annealing algorithm is adopted to detect the parameters of ellipses, hyperbolas and lines in images and applied to seismic pattern detection.

我们提出一个运用模拟退火演算法的参数侦测系统来侦测影像中的直线、圆、椭圆与双曲线，并且将此系统应用到震测图形的侦测上。

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。