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 圆心角 Hyperbolic/Parabolic Interpolation Algorithms Based on Central Angle Division 基于圆心角分割的双曲线、抛物线插补算法 The diversion tunnel of QPQ Hydro Project is located on the right side of river, with 523. 76m tunnel span, and section shape like city gate with 120°central angle, and 1:200 longitudinal slope. QPQ水利枢纽工程导流隧洞布置在河右岸,洞身长523．76m,洞身段为圆心角120°,7m×9．2m(宽×高)的城门洞形,设计纵坡为1:200。 Influence of Eccentric Support on Two-Span Curved Box-Girder Bridges with 90-Degree Central Angle 偏心支承对90°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 偏心支承对45度圆心角双跨弯箱梁桥的影响 The test shows that nominal transverse splitting strength of concrete cylinder is well correlated to the concrete cube strength and splitting strength of cube and cylinder,especially,above interrelation is more ideal when hold-down central angle is 90°. 经试验证明,混凝土圆柱体的横劈名义强度与混凝土的抗压强度、立方体及圆柱体纵劈强度有很好的相关性,尤其当压具圆心角为90°时,上述关系更为理想。 The Effect of Central Angle on Elastic and Plastic Mechanical Behavior of Prestressed Concrete Curved Continuous Beams 圆心角对预应力砼曲线连续梁弹塑性力学的影响 When the central angle is increased，the torsional effect and the transversaldisplacement is obvious. 当圆心角较大时，上部结构的扭转效应和横桥向位移均较大。 Elliptical, hyperbolic and parabolic interpolation algorithms are introduced in this dissertation, which are based on central angle division. 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; (4)A series of factor such as the difference about the centre of figure and the shear centre, curvature radius, central angle is discussed. (4)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。 We use the waveguide simulation software BeamPROP? to analyze the effects of the Y-branch angle, the radius and central angle of arc waveguides, and the length of straight waveguide on insertion loss and nonuniformity. 采用光波导数值模拟软件BeamPROP~(TM)分析Y分叉角度、圆弧波导的半径与圆心角、直波导长度等结构参数对插入损耗与分光均匀度的影响。 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. 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。 the mendable Canny operator based on the linear interpolation is used to pick up the edge of the pointer, the pointers’instructive direction is gotten via the circumference chord length detection method proposed by the article, then according to the central angle of pointer relative to the benchmark and conjunctive relation, the right reading is received The database information management system realizes the consumers’water fee management. 利用基于线性插值的Canny算子提取边缘,通过本课题提出的圆周弦长灰度检测法得到指针的指示方向,进而依据指针相对于基准的圆心角和关联关系正确读数。 数据库信息管理系统实现对用户用水信息的管理,主要功能分三大模块:一. The conclusions gotten in the theoritical aspect are as follows:as the positions ofthe source and two sensors which are not located in the same generatrix and central angle oftwo generatrix between them is increased, the time difference of false location is increasedand the position of false location is located in the direction of the sensor near the source. 从理论上得到的结论为：当声源位置不在传感器所在母线上时，引起的伪定位时差随着声源所在母线与传感器所在母线之间的圆心角增加而增加，伪定位位置相对声源轴线位置偏向于相距它比较近的传感器一侧。 Analysis is carried out for direct determination of the central angle α in compression in zone of reinforced concrete member with circular section. 对圆形截面受压区圆心角系数α的一次准确判断进行了分析，并基本上可找到真值α。 This paper focuses on the calculation method of pretress lossproduced by anchoring curve prestressed bar with larger central angle. 本文讨论了较大圆心角情况下，圆派曲线预应力钢筋因锚固产生的预应力损失的计算方法。 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. 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。 When the central angle equals to 360°,the circle representation can then be obtained. 对于大于180°的圆弧则采用两段三次NURBS曲线来表示，当圆心角为360°时，则得到了整圆的表示。 A mechanical analysis was made to the bearing area,the bearing capacity,the volume,the internal pressure and the vertical siffness of bellow type rubber spring. The mechanical parameters were calculated as the semi central angle of the bellow arc in the radial section θ changed from 80° to 120°. 对曲囊式橡胶空气弹簧的承载面积、承载力、容积、内压和垂直刚度进行了力学分析，计算了胶囊经线方向断面圆弧的半个圆心角θ从80°～120°范围变化时，橡胶空气弹簧各力学参数的数值 The detonation propagation in the arc insensitive explosive initiated at the base plane has been calculated with GGO2D code of the general geometricaly optical model of the detonation shock dynamics method,and computed the time of arrival on different radius with the same central angle. The computational results agree well with the experimental results. 用爆轰冲击波动力学的广义几何光学模型GGO2D编码计算了底面起爆的圆弧钝感炸药的爆轰波传播过程，以及同一圆心角上不同半径的爆轰走时，计算结果与实验符合得很好。 The calculating results indicate that the central angle increases with chinmey radius, wall thickness and tensile strength raising, and reduas with chinmey mass increasing. The central angle of blasting gap of brick chinmey demolition changes from 149 degree to 196 degree. At last, the proposal is that the central angle of gap of brick chimney demolition should not be over 180 degree, except for chimneyS with smaller mass. 结合拆除爆破工程实践，建立了砖烟囱爆破切口圆心角的计算公式．计算结果表明：圆心角随烟囱质量的增加而减小，随烟囱半径和壁厚的增加而增大，随砖与砂浆之间粘接强度的增大而增大．大部分砖烟囱爆破切口圆心角的变化范围为149～196,°，建议除质量特别小的烟囱外，砖烟囱爆破切口圆心角不宜大于180°.

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2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社