Numerical Simulation of Influence of Variation of Fingers Flare Angle on Propulsion in Pull; An Improved Delaunay Triangulation and Boundary Generation of Water Depth Data Set 划水时手指张角的变化对游泳推进力影响的数值模拟航道工程水深数据三角化及边界生成算法的改进
Compared with conventional Eplane sectoral horn, it has low sidelobe level, short physical length and wide flare angle. 与通常的E面扇形喇叭比较,这种喇叭具有较低的副瓣电平,短的喇叭长度和宽的张角。
This paper presents a preprocessing algorithm of angle association which is deduced with maximum detection range of each sensor and relative location of sensors, and gives several new concepts such as association flare angle, candidate observation set and available observation set. 提出了一种利用传感器的最大探测距离和相对位置信息通过几何推导得到的角度观测数据预处理算法,并给出了关联张角、候选观测集和有效观测集等新概念。
The experimental results show that both the depth and the radius exert an influence on the stress concentration at the groove bottom remarkably, and the influence of the flare angle can be neglected. 实验研究表明,槽深、槽底圆角半径对槽底应力集中水平的影响最大,而槽外形夹角对槽底应力集中水平的影响程度最小。
A new concept is presented with wave mode theory. According to this concept, the impedance of antenna aperture cannot be regarded as the wave impedance in vacuum, but is connected with antenna size and flare angle. 本节从波模理论出发,提出喇叭的开口阻抗不能看作真空波阻抗,它与喇叭尺寸、张角有关;
Computation method of near and far field radiating characteristics of narrow flare angle corrugated horn about its radiation center is given in this paper. The computer aided analysis diagram is listed and the satisfactory results are obtained. 本文给出了小张角波纹喇叭关于其辐射中心的远场和近场辐射特性的计算方法,并给出了波纹喇叭在其工作频带内的计算机辅助分析框图。
Tests prove that the actual angle of flare from which separation fluids just occur is smaller than the optimum angle of flare obtained by theoretical calculation because of the influences of discharge curved pipe. 试验证明,由于水泵出水弯管的作用,出水流道实际开始脱流的扩散角小于理论计算的最优扩散角;
Computation of radiation characteristics of narrow flare angle corrugated horn 小张角波纹喇叭辐射特性计算
The relationship between axial liquid path and second focus depth in the workpiece, identification of defect wave by using longitudinal and shear wave, the effects of refraction angle and focus flare angle on detection sensitivity were investigated. 研究了工件内二次焦点深度随轴向液程的变化关系,横波和纵波检测时缺陷波的识别问题,以及折射角和焦点张角对检测灵敏度的影响。
However, the horn size was very long, if cut down the size of antenna horn directly, it should increase the phase error at the aperture because of large flare angle which caused gain decrease. 整个天线的结构比较长,如果直接缩小喇叭的长度,就会因大的喇叭口径张角而增加相位误差,进而导致天线的增益下降。
The influences of inclined angle and flare angle on the LCX circuit model are studied and analyzed. After summarizing, the reason of this parameter trend is analyzed in theory. 4. 研究并分析了倾斜角度、周向角度对于漏缆缝隙电路模型参数的影响,并通过总结与归纳,从理论上分析了这种变化趋势产生的原因。