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Xinwei Yang,Cheng Yang,Shujuan Hou,Yiqi Mao 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.11
This work provide theoretical understandings for the enzyme-degradable PCL, and assist its structural designs and engineering applications. An energy-dependent evolution model is developed to reflect the enzyme-triggered decrystallization of crystals and the further dissolution by applying a chain-broken chemical reaction. Then, the mechanical properties of the enzyme-degradable semicrystalline PCL is modelled through the homogenization-based procedure by the volume-average of a collection of laminated inclusions with crystals and amorphous phase. A dual-phase-lag diffusion model is advanced to solve the enzyme concentrations in the PCL. The model is calibrated by the experiments and then applied for the chemomechanical properties of the PCL when under enzyme conditions. Some numerical examples are conducted to discuss effects of the enzyme concentration and the crystallinity on the crystallographic axe evolution as well as the overall chemomechanical properties of the semicrystalline PCL.
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Flexible Protocol Reconfiguration for Emergency Communication Systems
Ji Zhang,Hai Li,Shujuan Hou 한국전자통신연구원 2011 ETRI Journal Vol.33 No.1
The necessity for services of emergency communication systems to be uninterrupted and reliable has brought forward strict requirements for express software upgrades of base stations. Based on reconfigurability technology, this paper presents a protocol reconfiguration scheme for emergency communication base stations. By introducing the concept of ‘local safe state,’ the proposed scheme could make the updating and replacement of the protocol software flexible and maintain interactions during the updating procedure to achieve seamless system upgrades. Further, taking TETRA protocol stack and VxWorks operating system as an example, specific processes and realization methods of reconfiguration are proposed in this paper, along with the measurements of the factors impacting on the system performance. Simulation results show that, compared with traditional technology, the method proposed significantly improves the system efficiency and does not interrupt system services.
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Dynamic Changes of Transcriptome and Metabolites During Ripening of Alpinia Oxyphylla Fruit (AOF)
Pan Kun,Yu Xiaodan,Wang Shujuan,Hou Jie,Luo Yuchao,Gao Bingmiao 한국식물학회 2022 Journal of Plant Biology Vol.65 No.6
Alpinia oxyphylla (Yizhi) is an economically valuable plant, not only used as edible fruit, but also as an important traditional medicinal material. However, there are few studies on fruit development and metabolic pathways. To elucidate the dynamic changes of metabolites and transcription levels during fruit development of A. oxyphylla, the four parts of A. oxyphylla fruit from different periods, including early fruit (EF), middle fruit (MF), late pericarp (LP) and late seed (LS) were collected. KEGG pathway analysis shows that DEGs in EF, MF, LP are involved in amino sugar and nucleotide sugar metabolism, starch and sucrose metabolism, and plant hormone signal transduction. However, at the late part of fruit development (LS), most of the DEGs between LS and LP were enriched in pyruvate metabolism, glycolysis/gluconeogenesis, tryptophan metabolism. We found that in the early and middle parts of fruit development (EF, MF), many differential metabolites were enriched in piperidine tropane and biosynthesis of secondary metabolites, pyridine alkaloid biosynthesis. In addition, important active components, such as nootkatone in A. oxyphylla fruits accumulated in the LS part, but did not show significant differences in the first three parts. Some key transcription factors that are significantly positively correlated with the maturation of AOF have also been identified. Together, our research provides new insights into the accumulation of metabolites and the dynamic changes of the transcriptome during fruit development.
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