圆心角

设取∠aob为一个圆的圆心角。

Let angle AOB be taken as a central angle of a circle .

基于圆心角分割的双曲线、抛物线插补算法

Hyperbolic / Parabolic Interpolation Algorithms Based on Central Angle Division

李强等在已知三个型值点时，通过直接给出控制顶点和权因子的方法得到用二次NURBS精确表示圆弧的方法，但只给出圆弧的圆心角小于π的情况。

An approach of representing circular arcs with NURBS of degree two was given by others , but it was based on the hypothesis that the arc angle is less than n.

土坡等圆心角斜条分法与经典条分法的比较

Comparison of D slice method and classical slice methods for soil slopes

偏心支承对45度圆心角双跨弯箱梁桥的影响

Influence of Eccentric Support on two-span Curved Box-girder Bridges with 45-degree central angle

圆心角是影响曲线梁力学行为的重要因素。

Central angle is an important influencing factor of the mechanical behavior for curved beams .

圆心角及支座布置对圆弧曲线箱梁桥支座反力的影响

Effect of Central Angle and Bearing Arrangement on Bearing Reaction of Arc Curved Girder Bridge

圆心角对预应力砼曲线连续梁弹塑性力学的影响

The Effect of Central Angle on Elastic and Plastic Mechanical Behavior of Prestressed Concrete Curved Continuous Beams

甲板圆心角的增加会增大壳体的辐射声功率级。

Moreover , the bigger the central angle of floating deck is , the higher the sound radiation power is .

最后，对实际路段进行仿真，结果表明在圆弧段上，参数圆心角、半径、车速均对行车安全舒适性有影响。

The results indicate that the central angle , radii and speed all influence the traffic safety and riding comfort .

介绍了基于圆心角时间分割的圆弧、椭圆、双曲线、抛物线等插补算法；

Elliptical , hyperbolic and parabolic interpolation algorithms are introduced in this dissertation , which are based on central angle division .

一弧度就是长度刚好等于半径的一段圆弧所对的圆心角。

A radian is the angle subtended by an arc of a circle whose length is just equal to the radius .

根据圆弧的时间分割法插补原理，开发了基于圆心角分割的双曲线、抛物线插补算法。

According to the interpolation principle of time division of an arc , a hyperbolic interpolation algorithm and a parabolic interpolation algorithm based on central angle division are developed .

构造圆形截面正截面偏压承载力极限状态方程时，采用二次多项式替代了求解受压区混凝土截面面积的圆心角的超越方程，实现了对该节点的可靠度计算。

The quadratic multinomial was imported to replace the iterated equation in constitution of the limit state equation , which let the reliability analysis of the key point come ture .

利用有限元软件，建立了跨径相同、曲率半径和圆心角以及支撑形式不同的弯梁桥计算模型。

The calculation models of curved beam bridges with same span length , but different curvature radius , center angles and supporting forms are established by means of finite element software .

利用《人体总重心圆失真分析软件》通过调整总重心圆半径和圆心角的大小来控制人体总重心圆的失真程度，可根据计算结果来选择实验方案。

Applying the software of analyzing distortion of circle of general gravity center , we might select the experimental project by adjusting the radius and central angle to control the distortion .

并根据Z-缓冲算法原理给出了非设计接触模式的判断准则以及数学表达式。针对顶部圆弧对应圆心角较小的特点，采用两条线段来逼近顶部圆弧使后2类接触判断得到简化。

Then analytical solutions were established using Z-buffer algorithm , and then top arc was approached by two line segments to simplify the determination of the last 2 kinds of contact points .

得到以下研究成果：（1）圆心角的变化对曲线梁桥不利扭转为主的振型的影响较大。

Results can be gotten as follows : ( 1 ) The change of central angle has biggish effect on vibration mode of curved girder bridge which is dominated by adverse torsion .

以分析、计算结果，文章对本次爆破所设计的切口圆心角进行了评价，并结合实际爆破效果，对砖混结构烟囱定向倾覆时的力学模型选用，提出了建议和看法。

At the same time , contacting with the blasting effectiveness , the view of sleeting the mechanics model as the brick - concrete chimney is demolished by directional blasting is suggested .

随着圆心角的增大，曲线梁桥的以扭转为主的振型出现的越来越晚也越来越少。

With the increase of the change of central angle , vibration mode of curved girder bridge , which is dominated by torsion , appears later and later , also less and less .

利用检测的声时值对圆形钢管进行脱空定量研究，提出了通过计算缺陷处弦长所对应圆心角的大小来进行脱空的定量分析。

In this paper , circular steel pipe is done for the quantitative study by detecting the sonic time and we do a quantitative calculation made by calculating the chord length defects of the central angle .

研究圆柱根圆等截面圆柱榨螺体积的计算，将螺纹对应的圆心角M等分，得到M个计算单元。

The volume of cylinder-shaped worm section with equal area has been studied and computed . The center angle corresponding with the screw thread was divided into M equal segments that would be computed as calculation elements .

国际单位制采用的平面角单位；长度等于半径的弧所对的圆心角。

The unit of plane angle adopted under the System International d'Unites ; equal to the angle at the center of a circle subtended by an arc equal in length to the radius ( approximately 57.295 degrees ) .

介绍了测量局部凸圆半径的一种新方法及其设计方案，该方法能直接测读圆心角大于53°的局部凸圆半径，不需要二次计算，适于生产现场使用。

New method and design for measuring the local convex circle radius are introduced . This method can directly measure the radius of local and convex circle whose central angle is bigger than 53 ' , without secondary calculation .

本文就增强其可视性进行了研究，提出了颜色比例法以区分相交折线，圆心角映射法展示信息的分布和坐标轴非等值变化显示重点区域详细信息。

For strengthen its visuality , this paper present color proportion method to distinguish cross poly-lines , central angle mapping method to exhibit information distribution , and axes are not equivalent changed showing the detailed information in the key area .

对曲线梁中的剪、形心位置的差异以及曲率半径、圆心角、预应力大小、摩阻损失等内力影响因素进行了分析。有时，荷载作用在形心与剪心距离的一半处较为有利。

A series of factor such as the difference about the centre of figure and the shear centre , curvature radius , central angle is discussed . Sometimes it is better to locate the force half-way between the centroid and the shear centre .

提出确定异型钢丝形状和尺寸的方法：（1）计算异型钢丝在法面内的曲率半径；（2）计算异型钢丝大面所对应的圆心角。

To put forward the methods of determining the shape and size of shaped steel wire such as how to calculate the curvature radius in normal plane and the central angle corresponding to large section , then the pass can be designed by computer .

通过对调制式旋转导向钻井工具液压盘阀机构的工作原理、力学模型的理论和仿真分析，给出了上盘阀高压孔圆心角的最优设计参数；

According to the work principle , mechanical model theory and simulation analysis of the hydraulic control valve of the drilling tool , the optimal design parameters of the angle of center of circle of the high pressure hole of upside valve are proposed ;

结合某薄壁钢筋混凝土烟囱和水塔的定向爆破拆除，提出了确保定向爆破安全、成功的几条重要技术措施：①爆破切口圆心角可减小到208°；

Based on the directional blasting in demolition of a chimney and water tower built in thin reinforced concrete some key technological measures were put forward for the safety and success in directional blasting . These measures include : ① cutting down the blasting incision central angle to 208 °;