Hongbo Guan

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This paper studies the finite element FE approximation to a second-type variational inequality. The supe rclose and superconvergence results are obtained for conforming bilinear FE and nonconforming EQ FE schemes under a reasonable regularity of the exact solution u ∈ H5/2 Ω , which seem to be never discovered in the previous literature. The optimal L2-norm(More)
A class of Crouzeix-Raviart type nonconforming finite element methods are proposed for the parabolic variational inequality problem with moving grid on anisotropic meshes. By using some novel approaches and techniques, the same optimal error estimates are obtained as the traditional ones. It is shown that the classical regularity condition or quasi-uniform(More)
This paper develops an analytical CRM model, called C-RS model, based on the rough sets theory and cluster method. The cluster algorithm K-means is used to classify the data set into different groups according to different distance. Hu's algorithm and IADT have been applied to study the rough sets analytical model. The proposed C-RS model is innovatively(More)
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