This paper analyse the distributed parameters model of long distance transmission line,and educe the vector-circular-graphical base on the voltage vector diagram.
本文通过远距离输电线的分布参数模型分析,在电压向量图的基础上得出向量圆图,把向量圆图和分布参数模型联系起来,得出了最大功率角δ_(Max)的确定方法及其物理解释,并将传输有功功率与向量圆图的三角形面积结合起来。
By means of rotary unit vectors, the equations of displacement, velocity and acceleration of the virtual mechanism were developed.
基于高副低代原理 ,将平面凸轮机构代换为平面连杆机构 ,运用圆向量函数建立代换机构的位移、速度、加速度矢量方程式 ,通过计算虚拟连杆的杆长和方向 ,求得凸轮实际廓线、曲率半径和压力角的表达式 ,并给出用圆形刀具加工凸轮时刀具中心的轨迹方程。
A new fingerprint drectional image—roundness directional image is proposed,which transits smoothly and exhibits not only good continuity and excellent robustness to the noises,but also filter the noises in the picture of low quality,represent the basic structural features of the fingerprint more precisely,and reduce the workload by fifteen percent.
提出一种在现行方向图的基础上改进的圆形方向图,这种圆形方向图过渡平滑、自然、具有很好的连续性、抗噪性,同时对低质量指纹图像具有良好的鲁棒性,能更精确地反应指纹脊线的结构特征,而且计算量比现行方向图减少15%,试验证明了方法的有效性。