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GMPG: A Geometric Multipath Generating Method in Software-Defined Service Overlay Network
Yunchong Guan,Weimin Lei,Wei Zhang,Yuzhuo Zhan,Hao Li,Songyang Zhang 한국통신학회 2019 한국통신학회 학술대회논문집 Vol.2019 No.1
Multipath diversity (MPD) significantly impacts multipath transmission quality. Enough MPD helps improve concurrent link utilization and weaken negative impacts from a single path, thus improves abilities of congestion and failure tolerance. However, MPD is hard to guarantee on overlay networks because of little awareness of underlay network and few evaluation methods. In this paper, we design a multidimension orchestration view and propose a geometric multipath generating (GMPG) method. Overlay nodes are orchestrated in a two-dimension, i.e., intra-AS and inter-AS dimensions, view to enhance the awareness of underlay networks. Firstly, we generate coordinate-based views independently in each autonomous system. Then independent views are merged by embedding predicted switch points. The GMPG method evaluates and improves MPD from a novel perspective. Considering that MPD could be characterized by node diversity (ND), we impose some geometric mechanisms on the view to convert ND to MPD, including Transmission Direction to facilitate path convergence, Transmission Surface to reduce search complexity and Deviation Angle to evaluate link diversity. GMPG is conducted on the control plane of software-defined service overlay network both in inter-AS and intra-AS phases to establish end-to-end multiple paths. Experiments demonstrate that GMPG guarantees MPD better and the transmission quality is improved.
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Zhu Sining,Wan Haitao,Yan Zhibo,Xi Chen,Zhang Yuzhuo,Zhang Fan 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.9
With the continuous development of the concept of green chemistry, more attention is being paid to the selective capture of copper (II) from wastewater and its recovery and reuse. Ion imprinting technology is widely used to remove heavy metals from aqueous solutions due to its high selectivity. In this work, Cu(II) imprinted polymer (Cu(II)-IIP) was prepared by stepwise polymerization using Cu(II) ions as the template ions, PEG-600 as a pore-forming agent, epoxy resin as the carrier, and polyethylene polyamine as curing agent and complexing agent. The influences of solution pH, reaction temperature, reaction time and initial solubility of metal ions on its adsorption ability were systematically examined. The studies showed that the maximum adsorption quantity was 91.58 mg/g when pH=5 and T=318 K. The adsorption for Cu(II) of the Cu(II)-IIP was considered to be the monolayer chemisorption and spontaneous endothermic process. In the presence of multiple coexisting ions, Cu(II)-IIP had high selectivity for Cu(II). After five adsorption-desorption cycles, high removal rate could still be obtained, which means that the material provides a feasible method for treating wastewater containing Cu(II) ions.
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Dongmin Zhao,Qing Tao Liu,Xinmei Huang,Huili Wang,Kaikai Han,,Jing Yang,Keran Bi,Yuzhuo Liu,Lijiao Zhang,Yin Li 대한수의학회 2018 Journal of Veterinary Science Vol.19 No.4
Heat shock protein A9 (HSPA9), a member of the heat shock protein family, is a putative receptor for Tembusu virus (TMUV). By using Western blot and co-immunoprecipitation assays, E protein domains I and II were identified as the functional domains that facilitate HSPA9 binding. Twenty-five overlapping peptides covering domain I and domain II sequences were synthesized and analyzed by using an HSPA9 binding assay. Two peptides showed the capability of binding to HSPA9. Dot blot assay of truncated peptides indicated that amino acid residues 19 to 22 and 245 to 252 of E protein constitute the minimal motifs required for TMUV binding to HSPA9. Importantly, peptides harboring those two minimal motifs could effectively inhibit TMUV infection. Our results provide insight into TMUV–receptor interaction, thereby creating opportunities for elucidating the mechanism of TMUV entry.
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