recurvev.折回； 使 ... 向后弯曲n.反向弯曲； 后弯recurvi.重现；再发生recursive signal predictor递归信号预测器recursive conceptual graph递归概念图Recursive kernel estimator递归核估计量recursive state estimation递归估计recursive fuzzy clustering模糊集合Recursive Utility Function递归效用recursive summation method循环累加法recursive cycles algorithm周期预推算法recursive descent analysis递归下降分析法recursive filtering method递推滤波方法