Fiori Simone
Dipartimento di Ingegneria dell’Informazione, Facoltà di Ingegneria, Università Politecnica delle Marche, Via Brecce Bianche, Ancona I-60131, Italy.
IEEE Trans Neural Netw. 2011 Dec;22(12):2132-8. doi: 10.1109/TNN.2011.2168537. Epub 2011 Oct 6.
This brief tackles the problem of learning over the complex-valued matrix-hypersphere S(α)(n,p)(C). The developed learning theory is formulated in terms of Riemannian-gradient-based optimization of a regular criterion function and is implemented by a geodesic-stepping method. The stepping method is equipped with a geodesic-search sub-algorithm to compute the optimal learning stepsize at any step. Numerical results show the effectiveness of the developed learning method and of its implementation.
本简报探讨了在复值矩阵超球面S(α)(n,p)(C)上进行学习的问题。所发展的学习理论是根据基于黎曼梯度的正则准则函数优化来制定的,并通过测地线步进方法来实现。该步进方法配备了一个测地线搜索子算法,以在任何步骤计算最优学习步长。数值结果表明了所发展的学习方法及其实现的有效性。