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Research on Preparation of Ni/SiO2 Optical Attenuation Slice by Magnetron Sputtering
Lei Li,Hui Tang,Shanshan Hao,Wenxue Wang 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.12
In order to find new methods for preparing and improving the performance of optical attenuation slice. Vacuum magnetron sputtering method was used to prepare Ni/SiO2 composite film optical attenuation slices, with vacuum magnetron sputtering apparatus, at 5,10,15,20,25min sputtering time, 0.2,0.4,0.6,0.8,1.0Pa sputtering pressure and sputtering power 300~1200W. The XRD, SEM, EDS, AFM and 722 spectrophotometer also were used to study the effects of different sputtering time, sputtering pressure and sputtering power on the film structure, surface morphology, composition, three-dimensional structure, surface roughness and light attenuation rate of optical attenuation slice samples. The results indicated that: Ni/SiO2 composite films were formed, instead of simple physical adsorption between Ni film and SiO2 substrates with magnetron sputtering by XRD analysis and calculation, with uniform grain size of 25.96, 32.38, 32.29,26.95, 25.92nm, respectively. The main component element was Ni, but there were few impurities deposited on the substrates. Impurities were reduced gradually with the increase of sputtering time, mainly resulted from two sputtering of Ni atoms by EDS; The film surface was smooth and dense, flatness and organizational structure of Ni film were better, surface roughness was 1.267nm at 25min sputtering time, 0.4Pa pressure and 400W power with SEM and AFM. Light attenuation rate of optical attenuation slices was different in different process parameters, and the maximum reached 0.52, film flatness, impurities and defects were the main reason by the light attenuation performance analysis.
Yan Guo,Wenxue Fan,Shuyu Cao,Yuefeng Xie,Jiancong Hong,Huifen Zhou,Haitong Wan,Bo Jin 대한생리학회-대한약리학회 2020 The Korean Journal of Physiology & Pharmacology Vol.24 No.6
Endothelial cell injury is a major contributor to cardiovascular diseases. The 2,3,5,4’-Tetrahydroxystilbene-2-O-β-D-Glucoside (TSG) contributes to alleviate human umbilical vein endothelial cells (HUVECs) injury through mechanisms still know a little. This study aims to clarify the TSG effects on gene expression (mRNA and microRNA) related to oxidative stress and endoplasmic reticulum stress induced by H₂O₂ in HUVECs. We found that TSG significantly reduced the death rate of cells and increased intracellular superoxide dismutase activity. At qRT-PCR, experimental data showed that TSG significantly counteracted the expressions of miR-9-5p, miR-16, miR-21, miR-29b, miR-145-5p, and miR-204-5p. Besides, TSG prevented the expression of ATF6 and CHOP increasing. In contrast, TSG promoted the expression of E2F1. In conclusion, our results point to the obvious protective effect of TSG on HUVECs injury induced by H₂O₂, and the mechanism may through miR16/ATF6/ E2F1 signaling pathway.
Jinle Xiang,Wenxue Zhu,Junqi Han,Zhixi Li,Hanjin Ge,Dehui Lin 한국식품과학회 2012 Food Science and Biotechnology Vol.21 No.4
Chinese raisin tree (Hovenia dulcis) peduncle is a wonderful food material for fermented food for high contents of sugars and a variety of organic acids. The organic acids in the fresh peduncle, fermented wine, and vinegar were identified and quantified by HPLC, and changes in biochemical parameters and organic acids in the fermentation process were studied. Skin-on fermentation was carried out in the alcoholic fermentation, and 9identified organic acids fluctuated by physical or biochemical reactions during the alcoholic fermentation. Submerged fermentation was carried out in the acetic fermentation. It took 72 h to finish the 1st cycle of acetification with the titratable acidity 5.42%(w/v), and 30h to finish the 2nd cycle. The contents of acetic acid, formic acid, and α-ketoglutaric acid increased, while the rest identified organic acids decreased in the acetification process. The fermentation developed in this study appeared to be a practical processing method for Chinese raisin tree peduncles.
Quantum Bacterial Foraging Optimization for Cognitive Radio Spectrum Allocation
( Fei Li ),( Jiulong Wu ),( Wenxue Ge ),( Wei Ji ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.2
This paper proposes a novel swarm intelligence optimization method which integrates bacterial foraging optimization (BFO) with quantum computing, called quantum bacterial foraging optimization (QBFO) algorithm. In QBFO, a multi-qubit which can represent a linear superposition of states in search space probabilistically is used to represent a bacterium, so that the quantum bacteria representation has a better characteristic of population diversity. A quantum rotation gate is designed to simulate the chemotactic step for the sake of driving the bacteria toward better solutions. Several tests are conducted based on benchmark functions including multi-peak function to evaluate optimization performance of the proposed algorithm. Numerical results show that the proposed QBFO has more powerful properties in terms of convergence rate, stability and the ability of searching for the global optimal solution than the original BFO and quantum genetic algorithm. Furthermore, we examine the employment of our proposed QBFO for cognitive radio spectrum allocation. The results indicate that the proposed QBFO based spectrum allocation scheme achieves high efficiency of spectrum usage and improves the transmission performance of secondary users, as compared to color sensitive graph coloring algorithm and quantum genetic algorithm.
On the isoperimetric deficit upper limit
Jiazu Zhou,Lei Ma,Wenxue Xu 대한수학회 2013 대한수학회보 Vol.50 No.1
In this paper, the reverse Bonnesen style inequalities for con- vex domain in the Euclidean plane R2 are investigated. The Minkowski mixed convex set of two convex sets K and L is studied and some new geo- metric inequalities are obtained. From these inequalities obtained, some isoperimetric deficit upper limits, that is, the reverse Bonnesen style in- equalities for convex domain K are obtained. These isoperimetric deficit upper limits obtained are more fundamental than the known results of Bottema ([5]) and Pleijel ([22]).
Microstructure and Mechanical Properties of Mg–2.0Gd–1.2Y–1.0Zn–0.2Zr Alloy
Jianan Liu,Xiaoru Zhang,Wenxue Lv,Yumei Zhou,Daqing Fang,Xiangdong Ding,Jun Sun 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.7
The microstructural evolution of Mg–2.0Gd–1.2Y–1.0Zn–0.2Zr (GWZK) alloy during homogenization and subsequentaging heat-treatment and the tensile properties of the peak-aged sample at various temperatures have been investigated. Thephase transformation during homogenization, static precipitation during aging, and deformation mechanisms at 250 °C aresystematically analyzed through XRD, TEM and EBSD measurements. The peak-aged GWZK alloy has good combinationof strength and ductility at elevated temperatures owing to its high thermal stability by the LPSO phases distributed alongthe grain boundaries. The change (19 MPa) in the yield strength of peak-aged samples between RT and 250 °C is mainlyrelated to easy gliding of dislocations on the non-basal planes due to the decrease in critical resolved shear stress of slip. Two strengthening models are applied to quantitatively describe the efect of {11 −2 0}훼precipitate plates on Orowanstrengthening corresponding to RT and 250 °C. Ignoring changes in solid solution strengthening and grain boundary strengthening of the peak-aged sample caused by increasing temperature, the calculated reduction value (16.5 MPa) in macroscopicyield strength from RT (based on the basal<a>slip mode) to 250 °C (based on the pyramidal<c+a>slip mode) is in goodagreement with the measured reduction value (19 MPa).