Moreover to improve the performance of block tracking during person 's turning around we introduce a cylindrical model to approximate head and extract and track features in the warped cylindrical surface .

另外，为提高转身运动时 相邻两 帧图象的特征跟踪正确率，还引入圆柱模型来拟合头部，并在展开 柱面内进行块特征选取和跟踪。

When the sun 's rotation sweeps this warped surface across the earth we detect sudden changes in the polarity of the magnetic field .

当太阳的自转使这个 波浪 形 间隔 面扫过地球时，我们 就会探测到磁场极性的突然反转。

Based on the description of fitting warped blade surface with ruled surface the locus of cathode is induced by rigid body transfer in this paper .

在阐述用直纹面拟合 扭曲型 面的基础上，用刚体变换的方法推算出阴极的控制轨迹。