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。
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。