The consistency in pairs of the films was statistically analysed, including the length and diameter of metal bar and the distance and angle from the target dental root tip to the nearly middle point of metal bar. 用统计学方法分析20对牙片中金属条测量值的一致性及目标牙根尖到金属条近中端的距离和角度关系的一致性。
Then the methods are provided for determining the shaft centre location of the minimum base circle in two types problems, either with the given permissible pressure angle and the oscillating rod length or the centre distance as well as the permissible pressure angle. 提出了2类问题(已知摆杆长度及许用压力角或已知中心距及许用压力角)的最小基圆轴心位置的确定方法;
The algorithm combines two factors of curve length and curvature, by calculating the Bezier curves of between the distance and angle between the two endpoints and two control points ' connection, find the number of decomposition steps. 算法结合曲线长度与曲率两种因素,通过计算贝塞尔曲线的两个端点与两个控制顶点之间的连线的距离与夹角,求出曲线分解步数。
This method cannot be influenced by system grounding mode, the length of transmission line, fault distance, transition resistance, and fault switching angle. The sensitivity is even higher when the fault switching angle is small. 各种情况下的仿真证明了本算法的有效性,耐过渡电阻能力强,在小故障合闸角时灵敏度更高,不受系统接地方式、线路长短和故障距离影响。
The length of the gauge can be calculated after the relationship of the centers is recognized by giving a distance criterion with angle and length of two experiment points. 提出由中心点间距和中心连线角度构建的距离判距,解决了中心点位置关系的识别问题,进而计算出标距长度。