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27 results on '"Bai, Fusheng"'

7. An Approximate ADMM for Solving Linearly Constrained Nonsmooth Optimization Problems with Two Blocks of Variables

Author

Bagirov, Adil M., Taheri, Sona, Bai, Fusheng, Wu, Zhiyou, Leugering, Günter, Managing Editor, Hintermueller, Michael, Managing Editor, Starovoitov, Victor Nikolayevich, Associate Editor, Kenmochi, Nobuyuki, Associate Editor, Hoppe, Ronald W., Associate Editor, Chen, Zhiming, Associate Editor, Hoffmann, Karl-Heinz, Honorary Editor, Hosseini, Seyedehsomayeh, editor, Mordukhovich, Boris S., editor, and Uschmajew, André, editor

Published
2019
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11. Nonsmooth Optimization-Based Model and Algorithm for Semisupervised Clustering

Author

Bagirov, Adil M., Taheri, Sona, Bai, Fusheng, and Zheng, Fangying

Abstract

Using a nonconvex nonsmooth optimization approach, we introduce a model for semisupervised clustering (SSC) with pairwise constraints. In this model, the objective function is represented as a sum of three terms: the first term reflects the clustering error for unlabeled data points, the second term expresses the error for data points with must-link (ML) constraints, and the third term represents the error for data points with cannot-link (CL) constraints. This function is nonconvex and nonsmooth. To find its optimal solutions, we introduce an adaptive SSC (A-SSC) algorithm. This algorithm is based on the combination of the nonsmooth optimization method and an incremental approach, which involves the auxiliary SSC problem. The algorithm constructs clusters incrementally starting from one cluster and gradually adding one cluster center at each iteration. The solutions to the auxiliary SSC problem are utilized as starting points for solving the nonconvex SSC problem. The discrete gradient method (DGM) of nonsmooth optimization is applied to solve the underlying nonsmooth optimization problems. This method does not require subgradient evaluations and uses only function values. The performance of the A-SSC algorithm is evaluated and compared with four benchmarking SSC algorithms on one synthetic and 12 real-world datasets. Results demonstrate that the proposed algorithm outperforms the other four algorithms in identifying compact and well-separated clusters while satisfying most constraints.

Published
2023
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27. Comparing Several Treatments with Antibiotics for Community-Acquired Pneumonia: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.

Author

Bai F and Li X

Abstract

Background: We aimed to review relevant randomized controlled trials to assess the relative clinical effects of antibiotic treatment of patients with community-acquired pneumonia (CAP)., Methods: In this meta-analysis, we identified relevant studies from PubMed, Cochrane, and Embase using appropriate keywords. Key pertinent sources in the literature were also reviewed and all articles published through Oct 2019 were considered for inclusion. For each study, we assessed the risk ratios (RRs) or mean difference combined with the 95% confidence interval (CI) to assess and synthesize outcomes., Results: Overall, 36 studies were consistent with the meta-analysis, involving 17,076 patients. There was no significant difference in the mortality after subgroup analysis: individualized treatment vs. standard treatment; β-lactams plus macrolides vs. β-lactam and/or fluoroquinolone; ceftaroline fosamil vs. ceftriaxone; combination therapy vs. monotherapy or high-dose vs. low-dose. The drug-related adverse event incidence was significantly higher in the ceftriaxone group than in the other drug groups ( P <0.05) and also higher in the tigecyline group than in the levofloxacin group ( P <0.05). Compared with ceftriaxone, ceftaroline fosamil significantly increased the clinical cure rate at the test-of-cure (TOC) visit in the clinically evaluable population, modified intent-to-treat efficacy (MITTE) population, microbiologically evaluable (ME) population and the microbiological MITTE (mMITTE) population (all P <0.05). Compared with ceftriaxone, ceftaroline fosamil significantly increased the clinical cure rate at the TOC visit in the mMITTE population of Gram positive- Streptococcus pneumoniae ( P <0.05) and multidrug-resistant S. pneumoniae ( P <0.05)., Conclusion: There was a limited number of included studies in the subgroup analysis, but it will still be necessary to conduct more high-quality randomized controlled trials to confirm the clinical efficacy of different antibiotics used to treat CAP., Competing Interests: Conflicts of interest The authors declare that they have no conflicts of interest., (Copyright © 2021 Bai et al. Published by Tehran University of Medical Sciences.)

Published
2021
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