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2,080 results on '"Tian, ZhiGang"'

19. A Percolation-Based DTNs Routing Using Fountain Coding

Author

Zhi, Ruxin, Zhou, Bilei, Tian, Zhigang, Akan, Ozgur, Editorial Board Member, Bellavista, Paolo, Editorial Board Member, Cao, Jiannong, Editorial Board Member, Coulson, Geoffrey, Editorial Board Member, Dressler, Falko, Editorial Board Member, Ferrari, Domenico, Editorial Board Member, Gerla, Mario, Editorial Board Member, Kobayashi, Hisashi, Editorial Board Member, Palazzo, Sergio, Editorial Board Member, Sahni, Sartaj, Editorial Board Member, Shen, Xuemin, Editorial Board Member, Stan, Mircea, Editorial Board Member, Jia, Xiaohua, Editorial Board Member, Zomaya, Albert Y., Editorial Board Member, Rabie, Khaled, editor, Kharel, Rupak, editor, Mohjazi, Lina, editor, Elganimi, Taissir, editor, and Khan, Wali Ullah, editor

Published
2023
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31. Corrosion resistance of nano ZrO2/Zn-Al-C coating in simulated geothermal water

Author

YU Rong, LEI Huan, LU Siwen, TIAN Zhigang, FU Shaohua, and CHENG Keyao

Subjects
geothermal water, anti-corrosion coating, nano zro2, zn-al-c alloy powder, epoxy resin, Materials of engineering and construction. Mechanics of materials, TA401-492, Environmental engineering, TA170-171
Abstract

In order to improve the anti-corrosion performance of epoxy coatings, modified nano-ZrO2/Zn-Al-C epoxy resin composite coatings were prepared by using γ-aminopropyltriethoxysilane (KH-550) to improve the agglomeration phenomenon of nano-ZrO2 particles in combination with Zn-Al-C alloy powder. X-ray diffraction (XRD), Fourier infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) were used to characterize the structural changes of nano-ZrO2 before and after the modification. With electrochemical AC impedance spectroscopy (EIS) and polarization curves (Tafel), the corrosion behavior of the composite coatings in simulated geothermal water environment was analyzed. The results show that the nano-ZrO2 surface is successfully grafted with KH-550; the number of corrosion scaling products on the surface of the composite coating is significantly reduced compared with the original sheet after full immersion in simulated geothermal water for 720 h; the self-corrosion current density is 6.113×10-10 (A·cm-2), and the electrochemical performance is good. The modified epoxy composite coating effectively utilizes the superior properties of nanomaterials and metallic materials, and its hardness and corrosion resistance are improved significantly, which provides a reference for the long-term use of epoxy coating in geothermal water environment.

Published
2023
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39. Liver-resident NK cells suppress autoimmune cholangitis and limit the proliferation of CD4+ T cells

Author

Zhao, Zhi-Bin, Lu, Fang-Ting, Ma, Hong-Di, Wang, Yin-Hu, Yang, Wei, Long, Jie, Miao, Qi, Zhang, Weici, Tian, Zhigang, Ridgway, William M, Cao, Jie, Gershwin, M Eric, and Lian, Zhe-Xiong

Subjects
Biomedical and Clinical Sciences, Immunology, Liver Disease, Biotechnology, Autoimmune Disease, Chronic Liver Disease and Cirrhosis, Digestive Diseases, Aetiology, 2.1 Biological and endogenous factors, Oral and gastrointestinal, Inflammatory and immune system, Adoptive Transfer, Animals, Autoimmune Diseases, B-Lymphocytes, Basic-Leucine Zipper Transcription Factors, CD4-Positive T-Lymphocytes, CD8-Positive T-Lymphocytes, Cytokines, Disease Models, Animal, Disease Progression, Female, Hybridomas, Killer Cells, Natural, Liver, Liver Cirrhosis, Biliary, Male, Mice, Mice, Inbred C57BL, Mice, Knockout, Receptor, Transforming Growth Factor-beta Type II, Liver-resident NK, Cholangitis, CD4(+) T cell, Suppression, CD4+ T cell, Biochemistry and Cell Biology
Abstract

Liver-resident NK cells are distinct from conventional NK cells and play an important role in the maintenance of liver homeostasis. How liver-resident NK cells participate in autoimmune cholangitis remains unclear. Here, we extensively investigated the impact of NK cells in the pathogenesis of autoimmune cholangitis utilizing the well-established dnTGFβRII cholangitis model, NK cell-deficient (Nfil3-/-) mice, adoptive transfer and in vivo antibody-mediated NK cell depletion. Our data demonstrated that disease progression was associated with a significantly reduced frequency of hepatic NK cells. Depletion of NK cells resulted in exacerbated autoimmune cholangitis in dnTGFβRII mice. We further confirmed that the DX5-CD11chi liver-resident NK cell subset colocalized with CD4+ T cells and inhibited CD4+ T cell proliferation. Gene expression microarray analysis demonstrated that liver-resident NK cells had a distinct gene expression pattern consisting of the increased expression of genes involved in negative regulatory functions in the context of the inflammatory microenvironment.

Published
2020

46. ON ARITHMETIC PROGRESSIONS IN THE DIGITS OF ENGEL EXPANSIONS.

Author

TIAN, ZHIGANG and FANG, LULU

Subjects
*LEBESGUE measure, *REAL numbers, FRACTAL dimensions
Abstract

Denote by Eℱ and Eℐ the sets of real numbers whose Engel expansion digits contain arbitrarily long arithmetic progressions and arbitrarily long arithmetic progressions with arbitrary common difference, respectively. In this paper, the sizes of Eℱ and Eℐ are investigated from the measure-theoretical, fractal and topological viewpoints. We prove that Eℱ and Eℐ are of Lebesgue measure zero but have full Hausdorff dimension. Moreover, Eℐ is of first category while Eℱ is residual. [ABSTRACT FROM AUTHOR]

Published
2024
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