通过试验发现就环状橡胶圈（模拟废旧轮胎）这种柔性加糙体，垂直水流方向的投影面积是影响槽底糙率、水深和流速的主要因素。
By the testing we found the flexible artificial roughness rubber turns which simulated the wasted tires were the main factor which affect the roughness of the bottom which directed to vertical flow.
本文应用计算机视觉理论并根据汽车车轮在运动中的两幅投影图像，建立了计算车轮运动参数的数学模型；通过试验验证了该数学模型的正确性。
By two projection images of the wheel in motion, the mathematical model based on computer to solve the Automobile wheel motion parameter is set up in this paper, and its practicability is proved.
最后，将类矩阵和试验样本分别进行投影，并根据其欧氏距离的大小得出试验人脸的最终类别。
Finally, class matrix and tested samples were projected respectively through the proposed rules. Then, the final class that tested faces belonged to was declared according to the Euclidean distance.
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