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极半径
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  polar radius
     Based on the experimental results, it was proved that the algorithm of FDs based on polar radius function is the best one among them, and the recognition ratio arrives at 99% when it is conducted in the identification of spores.
     实验结果表明 ,基于极半径函数的傅里叶子最为理想。 将它用于孢子的识别和计数 ,正确识别率达 99%。
短句来源
     The involute polar angle and the polar radius under the different pressure angles was calculated using the EXCEL function aiming at the bisic dimension of the DIN3960 involute spline. And the polar angle and the polar radius was represented into AutoCAD polar coordinate, the involute was drawn through the spline linear tool. And then, a section of the involute was intercepted with the diameters of the point circle and the root circle, used it as the tooth face of the spline.
     根据DIN3960渐开线花键的坐标值,用EXCEL函数功能计算出不同压力角下渐开线的极角和极半径,表示成AutoCAD极坐标并通过样条线工具绘制出渐开线,再用齿顶圆和齿根圆直径截取一段渐开线作为花键齿面,并用分度圆直径绘制出渐开线齿剖面,经镜像和裁剪便可绘制出渐开线齿形。
短句来源
     This retrieval algorithm proceeded first on orientation normalization, then the model was projected on three orthogonal planes,afterward the feature vector which can differentiates images well was extracted with the way of Moment Invariants and Polar Radius Fourier Transform,and at last the similarity between two models was obtained from the three similarities of images with different weights.
     该检索算法首先对零件模型进行方位规范化,然后将其投影到三个正交平面上,对投影图像利用不变矩和极半径傅里叶变换分别提取图像特征,其联合特征向量可以很好地进行图像比较,最后加权三个图像之间的相似距离得到三维模型的相似距离。
短句来源
  “极半径”译为未确定词的双语例句
     Polar-Radius-Invariant-Moment for Pattern Recognition
     用于模式识别的极半径不变矩
短句来源
     (3) A novel moment, called 3D polar-radius-invariant-moment, is proposed for the 3D object recognition and classification.
     给出了三维极半径矩的定义以及三维极半径中心矩具有平移、缩放和旋转不变性的证明,为三维模型的检索提供了形状特征不变量提取的方法。
短句来源
     There are too many boundary feature description methods for object recognition,three main methods are Fourier descriptors,Relative moments, mathematical morphology.
     实际应用中,对物体边界特征描述的方法很多,本文对数学形态学、相对矩、基于极半径函数的傅里叶子这几种方法进行了比较研究。
短句来源
     (5) It introduced the principles of equal difference function algorithm, and some other equal difference function derived from which on this basis, features of skull boundary and region are extracted by using those different descriptor, then based on experiment results the respective advantages and disadvantages are analyzed.
     (5)介绍了均差函数的算法原理,提出一种边界Legender描述子,分析了基于极半径均差函数,分别颅骨边界特征进行提取,根据实验结果分析了各自的优缺点。
短句来源
     The air flow rate around stripped rotor was analyzed and studied. The velocity decreased with the increasing of the radius and the direction was perpendicular with the direction of radius.
     对割前脱联合收割机摘脱割台流场特性进行了分析, 认为摘脱滚筒周围气流速度随极半径增加而减小,方向与极半径垂直,建立了气流流速分布方程。
短句来源
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  相似匹配句对
     On the Spectral Radius of Two Types of Graphs
     两类图的谱半径
短句来源
     Polar-Radius-Invariant-Moment for Pattern Recognition
     用于模式识别的半径不变矩
短句来源
     Ionic Radius
     离子半径
短句来源
     Bungee Jump
     蹦
短句来源
     Boundary Radii of Cations
     正离子的边界半径
短句来源
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  polar radius
The analysis of the corresponding overdetermined system leads totheir special (but nontrivial) dependence of the polar radius.
      
The blue shifts associated with the limb effect appear 9%±5% larger in the polar radius vector than in an equatorial radius vector at cos θ = 0.5.
      
The solar figure as charted from these data diverges from a perfect sphere by a mid-heliolatitude depletion at the level of 50?mas, and an overall flatness, to the effect of the polar radius being shorter than the equatorial radius by 13±4?mas.
      
It is assumed that the diffuser walls are maintained at a temperature depending on the polar radius.
      
Elongation continues until the polar radius extends to about 1016 cm, at which point our quasi-steady assumption breaks down.
      
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The air flow rate around stripped rotor was analyzed and studied.The velocity decreased with the increasing of the radius and the direction was perpendicular with the direction of radius.The air velocity distribution equation was built,on which the detached grain kinematics equation math model was constructed,and the simulation in computer conducted.

对割前脱联合收割机摘脱割台流场特性进行了分析, 认为摘脱滚筒周围气流速度随极半径增加而减小,方向与极半径垂直,建立了气流流速分布方程。在此基础上, 构造了摘脱割台脱出物运动方程数学模型, 依此模型对脱出物运动轨迹进行了计算机仿真

The influence of the non-globular distribution of the sun's mass on the orbit motion of the Mercury is discussed. By assuming that the surplus advance of the Mercury perihelion is only attributed to this distribution, the difference between the equatorial radius and the polar radius and the oblateness of the sun is presented.

探讨了太阳质量的非球对称分布对水星轨道运动的影响 ,然后假定水星近日点的剩余进动完全是由于太阳质量的非球对称分布引起的 ,由此计算出了太阳在这种情形下应有的赤道半径和极半径的差及其扁率 .

Three algorithms of Fourier descriptors(FDs) based on polar radius function, rotation angle function and contour curvature function, respectively, are chiefly used in pattern recognition. An accurate algorithm was found out through comparative study of FDs. The original function values and their Fourier frequency spectrums of different shapes were calculated using three algorithms, respectively. Then inverse Fourier transformations were made by employed k (k=1,2,...,N) Fourier coefficients sequenced from large...

Three algorithms of Fourier descriptors(FDs) based on polar radius function, rotation angle function and contour curvature function, respectively, are chiefly used in pattern recognition. An accurate algorithm was found out through comparative study of FDs. The original function values and their Fourier frequency spectrums of different shapes were calculated using three algorithms, respectively. Then inverse Fourier transformations were made by employed k (k=1,2,...,N) Fourier coefficients sequenced from large to small, and the errors between the restored and the original functions were computed. These three algorithms were evaluated according to the curve of error with respect to k . Based on the experimental results, it was proved that the algorithm of FDs based on polar radius function is the best one among them, and the recognition ratio arrives at 99% when it is conducted in the identification of spores.

用于模式识别的傅里叶子主要有基于极半径函数、转角函数和曲率函数等三种方法 ,通过比较研究 ,找出一种运算简便且精度高的傅里叶子。对不同的图形用三种方法分别计算出原函数和傅里叶频谱 ,然后从大到小依次选取k个 (k =1,2 ,… ,N)傅里叶系数进行反变换 ,计算出反变换函数与原函数之间存在的误差 ,根据误差随k变化的曲线判断三种方法的优劣。实验结果表明 ,基于极半径函数的傅里叶子最为理想。将它用于孢子的识别和计数 ,正确识别率达 99%。

 
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