L21 - Open Access .click

Neural Processing Letters, 2021
As one of the most commonly used algorithms in the field of feature extraction, common spatial pattern (CSP) has a good effect on multichannel electroencephalogram (EEG) signal classification, especially for motor imagery-based signals. However, the formulation of the conventional CSP based on the L2-norm is sensitive to outliers.
Jingyu Gu, Mengting Wei, Yiyun Guo, Haixian Wang +3 more
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The primary structure of rat ribosomal protein L21

Biochemical and Biophysical Research Communications, 1989
The covalent structure of rat ribosomal protein L21 was deduced from the sequence of nucleotides in a recombinant cDNA and confirmed from the NH2-terminal amino acid sequence of the protein. Ribosomal protein L21 contains 159 amino acids (the NH2-terminal methionine is removed after translation of the mRNA) and has a molecular weight of 18,322 ...
K R, Devi, Y L, Chan, I G, Wool
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Robust nonnegative matrix factorization using L21-norm

Proceedings of the 20th ACM international conference on Information and knowledge management, 2011
Nonnegative matrix factorization (NMF) is widely used in data mining and machine learning fields. However, many data contain noises and outliers. Thus a robust version of NMF is needed. In this paper, we propose a robust formulation of NMF using L21 norm loss function. We also derive a computational algorithm with rigorous convergence analysis.
Deguang Kong, Chris Ding, Heng Huang
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