半径

This paper discusses the least squares estimator circledetection method which is based on statistical theory. It gets the position through edge tracing and uses the edge point to estimate the center and radius of circle.

本文采用基于统计原理的最小二乘圆检测法，以边缘跟踪确定圆边缘点位置，以最小二乘法估计圆心和半径，精度可达亚像素级。

Will be left; The level crowding length is 40% of digging reach, so that the bucketfilling factor

水平挖掘推进，不形成开采"底根"；●挖掘半径的水平推压行程，提高满斗充斗系数；40

The path density of relative movement is derivative of path arc length s to lapping tool radius R i.e.

相对运动轨迹密度就是相对运动轨迹弧长 s 对磨具半径 R 的导数，即 ds/dR 。

Based on the full three-dimensional numerical simulation for the centrifugal pump, an optimal mathematical model of blade curve is set up. In this model, the object function is the minimum length of the blade curve; the constraint condition is no recirculation atr=0.5. This model makes the design of optimum blade curve efficient.

在对离心泵内部流场进行全三维数值模拟的基础上，建立了叶片型线优化设计的数学模型以叶片长度最短为目标函数，叶轮相对半径，r=0.5处无回流为约束条件，讨论了该模型优化计算的方法。

The design of the 3-dimensional trajectory in horizontal wells is an optimal control system where the state variables are azimuth, inclination and the control variables are radius, tool-face angle and length of curve.

水平井三维轨道设计是以方位角、井斜角为状态变量，以曲线半径、装置角、曲线段长为控制变量，以入靶精度等为性能指标的非线性多阶段最优控制系统。

In order to control the flow separation by reducing the diffusion factor and enlarging the diameter of inner circle, the meridian plane profile of the return channel was redesigned, which is achieved by substituting arbitrary curve for the circle with no change of the axial length of the stage. Bezier curve with eight parameters was chose to describe the shape of meridian plane profile, and the optimization of the meridian plane profile was implemented combining back-propagation neural network with genetic algorithm.

改进的主要思路是减小弯道前半部分通道的扩压度，并同时加大弯道出口内侧的转弯半径，主要做法是在不增加整级轴向尺寸的前提下，用任意曲线取代传统弯道的同心圆环结构，给定弯道回流器子午型线的外侧型线，采用Bezier曲线对内侧型线的2段曲线进行参数化描述，利用遗传算法和反向传播(back-propagation，BP)神经网络相结合的方法对内侧型线进行优化，得到新的弯道回流器子午型线。

Firstly,to abtain the parameters of coupling system,such as the focal length and the position of the lens,computing the Gaussian lens formula,then establishing the rectangular coordinate system and constructing equation and tracing the marginal ray to compute the parameter of the radius of the image beam waist.

首先使用高斯光束的透镜变换公式计算透镜的焦距及放置位置等耦合系统的参数，然后建立直角坐标系并利用耦合系统的参数构建方程，对边缘光线追迹，计算出像方束腰半径值。

The Moon's actual radius varies as a function of position angle and libration because of the irregularity in the limb profile.

月球实际半径根据其位置角度函数和缓慢摆动而变化，由于其边缘轮廓的不确定性。

Analyzing side force coefficient threshold and supreme super elevation for scenic area road design aiming at the differences between scenic area road and general road at the aspects of operating speed and traffic composition,it can calculate the reasonable value of lowest radius of limit circle curve for scenic area road design.

针对风景区道路与一般公路在行车速度、交通组成等方面的区别，分析适用于风景区道路设计的横向力系数阈值、最大超高的取值，可推算出风景区道路设计极限平曲线最小半径的合理取值。

To be specific,by means of changing inside dimension of concave,enlarging working volume of crushing cavity,shortening length of parallel zone of crushing cavity ,and limiting engage angle and radius of curv.

通过轧臼壁内侧尺寸的变化，扩大破碎腔的工作容积、缩短平行区长度、限定曲面啮角和曲面半径等，从而提高了破碎机的破碎效率，延长了衬板的使用寿命，改善了产品的粒度分布。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。