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Directional monitoring and diagnosis for covariance matrices |
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| Authors: | Hongying Jing Jian Li Kaizong Bai |
| Affiliation: | School of Management, Xi''an Jiaotong University, Xi''an, Shaanxi, People''s Republic of China |
| Abstract: | |
| Keywords: | Direction matrix EWMA likelihood ratio test quadratic form statistical process control |