supported by the National Natural Science Foundation of China(Grant No.10871035);the Key Project of Scientific Research Fund of Hunan Provincial Education Department(Grant No.03A002);the Project Supported by Zhongshan Science and Technology Department(Grant No.2008A245)
We first introduce a similarity assumption to describe the similarity phenomenon in natural images, and establish a similarity principle which supplies a simple mathematical justification for the non-local means filte...
supported by National Natural Science Foundation of China (Grant No.10871035);the New Century Excellent Talents in University of China (Grant No. 05-0319)
Anti de Sitter space is a maximally symmetric, vacuum solution of Einstein's field equation with an attractive cosmological constant, and is the hyperquadric of semi-Euclidean space with index 2. So it is meaningful t...
利用Arnol'd的Legendrian理论,对三维Anti de Sitter空间中Lorentzian曲面进行了研究.引入光维高度函数概念研究了三维Anti de Sitter空间Lorentzian曲面的S1t×S1s-值、光锥Gauss映射的奇点,进行了奇点分类,揭示了类光Causs-kronecker...