Search

Your search keyword '"Zhang, Jinjin"' showing total 1,608 results
Start Over Author "Zhang, Jinjin"
1,608 results on '"Zhang, Jinjin"'

1. More on Maximally Permissive Similarity Control of Discrete Event Systems

Author

Wang, Yu, Zhu, Zhaohui, van Glabbeek, Rob, Zhang, Jinjin, and Tan, Lixing

Subjects
Computer Science - Formal Languages and Automata Theory
Abstract

Takai proposed a method for constructing a maximally permissive supervisor for the similarity control problem (IEEE Transactions on Automatic Control, 66(7):3197-3204, 2021). This paper points out flaws in his results by providing a counterexample. Inspired by Takai's construction, the notion of a (saturated) (G, R)-automaton is introduced and metatheorems concerning (maximally permissive) supervisors for the similarity control problem are provided in terms of this notion. As an application of these metatheorems, the flaws in Takai's work are corrected., Comment: 8 pages

Published
2024

5. Exploration and Exploitation of Unlabeled Data for Open-Set Semi-Supervised Learning

Author

Zhao, Ganlong, Li, Guanbin, Qin, Yipeng, Zhang, Jinjin, Chai, Zhenhua, Wei, Xiaolin, Lin, Liang, and Yu, Yizhou

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

In this paper, we address a complex but practical scenario in semi-supervised learning (SSL) named open-set SSL, where unlabeled data contain both in-distribution (ID) and out-of-distribution (OOD) samples. Unlike previous methods that only consider ID samples to be useful and aim to filter out OOD ones completely during training, we argue that the exploration and exploitation of both ID and OOD samples can benefit SSL. To support our claim, i) we propose a prototype-based clustering and identification algorithm that explores the inherent similarity and difference among samples at feature level and effectively cluster them around several predefined ID and OOD prototypes, thereby enhancing feature learning and facilitating ID/OOD identification; ii) we propose an importance-based sampling method that exploits the difference in importance of each ID and OOD sample to SSL, thereby reducing the sampling bias and improving the training. Our proposed method achieves state-of-the-art in several challenging benchmarks, and improves upon existing SSL methods even when ID samples are totally absent in unlabeled data.

Published
2023

8. In Vitro Production of Red Blood Cells: Progress and Challenge

Author

WANG Hui, ZHANG Jinjin, CHEN Lili, and XING Yanchao

Subjects
in vitro production of red blood cells, embryonic stem cells, immortalized erythroid progenitor cell line, blood transfusion, Medicine
Abstract

Although blood protection technologies such as autologous blood transfusion can alleviate to some extent the short supply of clinical blood, red blood cells are still in great demand as the main blood component. This problem can be solved by the safe production of red blood cells in vitro. At present, mature erythrocytes can be differentiated from embryonic stem cells, human induced pluripotent stem cells, umbilical cord blood, peripheral blood, and immortalized erythroid progenitor cell lines. This article reviews the sources and applications of red blood cells produced in vitro, and analyzes the current challenges, in order to provide new insights for blood transfusion therapy.

Published
2024
Full Text
View/download PDF

15. Research Progress of PDGF Promoting Wound Repair

Author

ZHAO Qin, ZHANG Jinjin, CHEN Lili, and XING Yanchao

Subjects
platelet-derived growth factor, wound repair, applied research, Medicine
Abstract

Platelet-derived growth factor (PDGF), a multi-potent cytokine, has caught attention in the field of wound repair. The PDGF ability to initiate cell proliferation, migration, secretion and promote angiogenesis can be beneficial for wound healing. Platelet-rich plasma and recombinant human PDGF that contain high concentrations of PDGF have been used for decades in wound repair. However, their short shelf life, limited allogenic use, low bioavailability, and many side effects make them unable to meet clinical needs. Optimized platelet-rich fibrin and concentrated growth factor have higher concentrations of PDGF and better wound repair ability. Platelet lysate, with the ability to significantly extend the preservation period and reduce the risk of allogeneic use, has become the development direction for platelet wound repair. The high-energy delivery system based on bioengineering technology can significantly improve the local resident rate and prolong the action time of PDGF. A variety of transformed PDGF capable of inducing sustained tonic signals can be created through the modification of PDGF structure and addition of active domains. Functional controllable PDGF simulation peptides can be generated by integrating the active domains and a variety of efficient PDGF gene delivery strategies can be derived, thus providing more potential options to solve the problem of wound repair. The focus of this article, is on reviewing the physiological and applied.

Published
2023
Full Text
View/download PDF

16. Tim-3/galectin-9 regulates Th1/Th2 cell balance in lipopolysaccharide-induced human lymphocytes

Author

SUN Xiaoli, ZHANG Jinjin, SONG Fengying, HUANG Yongli, CHEN Lili, XING Yanchao

Subjects
tim-3, galectin-9, t helper cells, jak2/stat3 pathway, sepsis, Medicine
Abstract

Objective To investigate the mechanism of Tim-3/galectin-9 in T helper type 1/2 (Th1/Th2) cell imbalance in lipopolysaccharide(LPS)-induced human lymphocytes. Methods Peripheral blood mononuclear cells (PBMC) were isolated from patients with sepsis. The expression of Tim-3, galectin-9, T-bet and GATA3 were detected by RT-qPCR; ELISA was used for detecting sTim-3, galectin-9, IFN-γ and IL-4.Isolated peripheral blood mononuclear cells were incubated with LPS and then cytokines related to Th1 and Th2 cells in the supernatant of cell culture were detected by ELISA; Western blot was used to detect the expression of JAK2/STAT3 related factors; Pearson correlation coefficient analysis was performed to identify relationship among Tim-3, galectin-9,IFN-γ and IL-4. Results The mRNA expression of Tim-3 and galectin-9 in peripheral blood of patients with sepsis was increased, and protein expression of Tim-3, galectin-9, IL-4 and GATA-3 was increased significantly. The levels of IFN-γ and T-bet were decreased and levels of p-JAK2 and p-STAT3 were elevated. After blocking Tim-3 expression, IFN-γ level increased, while IL-4 level decreased significantly. Phosphorylation of JAK2 and STAT3 decreased. Level of Tim-3 and of IL-4 was positively correlated with galectin-9, while Tim-3 was negatively correlated with IFN-γ;IFN-γ was negatively correlated with galectin-9, and Tim-3 was positively correlated with IL-4. Conclusions Tim-3/galectin-9 regulates the JAK2/STAT3 pathway and leads to the imbalance of Th1/Th2 cells in LPS induced inflammation.

Published
2023
Full Text
View/download PDF

30. Representation and Correlation Enhanced Encoder-Decoder Framework for Scene Text Recognition

Author

Cui, Mengmeng, Wang, Wei, Zhang, Jinjin, and Wang, Liang

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

Attention-based encoder-decoder framework is widely used in the scene text recognition task. However, for the current state-of-the-art(SOTA) methods, there is room for improvement in terms of the efficient usage of local visual and global context information of the input text image, as well as the robust correlation between the scene processing module(encoder) and the text processing module(decoder). In this paper, we propose a Representation and Correlation Enhanced Encoder-Decoder Framework(RCEED) to address these deficiencies and break performance bottleneck. In the encoder module, local visual feature, global context feature, and position information are aligned and fused to generate a small-size comprehensive feature map. In the decoder module, two methods are utilized to enhance the correlation between scene and text feature space. 1) The decoder initialization is guided by the holistic feature and global glimpse vector exported from the encoder. 2) The feature enriched glimpse vector produced by the Multi-Head General Attention is used to assist the RNN iteration and the character prediction at each time step. Meanwhile, we also design a Layernorm-Dropout LSTM cell to improve model's generalization towards changeable texts. Extensive experiments on the benchmarks demonstrate the advantageous performance of RCEED in scene text recognition tasks, especially the irregular ones., Comment: 15 pages, 5 figures, 3 tables

Published
2021

32. Strategies to Maintain Ovarian Function

Author

Wei, Jia, Ye, Shuangmei, Chen, Qian, Li, Milu, Tang, Weicheng, Zhang, Jinjin, Lu, Huan, Xi, Yueyue, Wu, Mingfu, Yuan, Ming, Du, Dingfu, Wen, Jingyi, Zhang, Yan, and Wang, Shixuan, editor

Published
2023
Full Text
View/download PDF

50. BDDC Algorithms for Advection-diffusion problems with HDG Discretizations

Author

Tu, Xuemin and Zhang, Jinjin

Subjects
Mathematics - Numerical Analysis
Abstract

The balancing domain decomposition methods (BDDC) are originally introduced for symmetric positive definite systems and have been extended to the nonsymmetric positive definite system from the linear finite element discretization of advection-diffusion equations. In this paper, the convergence of the GMRES method is analyzed for the BDDC preconditioned linear system from advection-diffusion equations with the hybridizable discontinuous Galerkin (HDG) discretization. Compared to the finite element discretizations, several additional norms for the numerical trace have to be used and the equivalence between the bilinear forms and norms needs to be established. For large viscosity, if the subdomain size is small enough, the number of iterations is independent of the number of subdomains and depends only slightly on the sudomain problem size. The convergence deteriorates when the viscosity decreases. These results are similar to those with the finite element discretizations. Moreover, the effects of the additional primal constraints used in the BDDC algorithms are more significant with the higher degree HDG discretizations. The results of two two-dimensional examples are provided to confirm our theory.

Published
2021

Catalog

Books, media, physical & digital resources
See catalog results