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RISS 인기검색어
- 검색키워드
- 저자 : Xueqin Lin (검색결과 5 건)
- 무료
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- 유료
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The Effects of Electric Field on Jet Behavior and Fiber Properties in Melt Electrospinning
Xueqin Li,Yuansheng Zheng,Xiaoqi Mu,Binjie Xin,Lantian Lin 한국섬유공학회 2020 Fibers and polymers Vol.21 No.5
The electric field and temperature are the two important factors that influence the diameter and properties of fiberin the melt electrospinning process. It is commonly known that the polymer jet behavior is governed by the electric fieldwithin spinning area. In present work, a comprehensively-designed and properly-conducted analysis was carried out toinvestigate into the effects of electric field on the jet behaviors, diameters, crystalline structure and mechanical properties ofthe resultant fibers. An auxiliary electrode was invited to enhance the electric field strength. The high-speed photography wasadopted to capture the jet motion, and also, the numerical simulation was used to understand the electric field distribution. Bymaking use of the whipping amplitude and whipping frequency, the characteristics of jet behavior were described. It wasfound that by applying an auxiliary electrode, the average fiber diameter reduced from 61.01 μm to 9.06 μm, and thecrystallinity and strength of the fiber was improved with the help of the higher electric filed intensity. In addition, the moreuniform electric field would produce finer and more uniform fiber because of the more stable jet motion.
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3D Numerical Simulation of Ice Accretion on a Rotating Surface
Mu, Zuodong,Lin, Guiping,Bai, Lizhan,Shen, Xiaobin,Bu, Xueqin The Korean Society for Aeronautical and Space Scie 2017 International Journal of Aeronautical and Space Sc Vol.18 No.2
A novel 3D mathematical model for water film runback and icing on a rotating surface is established in this work, where both inertial forces caused by the rotation and shear forces due to the air flow are taken into account. The mathematical model of the water film runback and energy conservation of phase transition process is established, with a cyclical average method applied to simulate the unsteady parameters variation at angles of attack. Ice accretion on a conical spinner surface is simulated and the results are compared with the experimental data to validate the presented model. Then Ice accretion on a cowling surface is numerically investigated. Results show that a higher temperature would correspond to a larger runback ice area and thinner ice layer for glaze ice. Rotation would enhance the icing process, while it would not significantly affect the droplet collection efficiency for an axi-symmetric surface. In the case at angle of attack, the effect of rotation on ice shape is appreciable, ice would present a symmetric shape, while in a stationary case the shape is asymmetric.
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Effects of Temperature on Melt Electrospinning: Experiment and Simulation Study
Xiaoqi Mu,Yuansheng Zheng,Xueqin Li,Binjie Xin,Lantian Lin 한국섬유공학회 2021 Fibers and polymers Vol.22 No.4
In this study, the jet formation progress, jet motion, resultant fiber diameter, fiber mat morphology, inner structuresand mechanical properties of the fibers prepared at different heating temperatures via melt electrospinning system werestudied, in a comprehensive and systematic manner. The temperature distribution of the melt electrospinning configurationwas simulated, in order to provide a good deal of insight into the experimental results. High-speed photography was adoptedto capture the images of jet formation process and jet motion during melt electrospinning. The experimental results showedthat higher heating temperature at the spinneret results in shorter jet formation time, smaller fiber diameter, more disorderedfiber mat, lower degree of crystallinity and strength. The simulation works was carried out, aimed at facilitating to deeplyunderstand the experimental results.
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Research on High-Dimensional Data Reduction
Cuihua Tian,Yan Wang,Xueqin Lin,Jing Lin,Jiangshui Hong 보안공학연구지원센터 2016 International Journal of Database Theory and Appli Vol.9 No.1
In this paper, features of high-dimensional data are analyzed, and existing problems of the Canonical Correlation Analysis (CCA) are analyzed for a single view of a full supervised view data. In order to improve CCA, we introduce the method of classifier and present a Classifying to Reduce Correlation Dimensionality (CRCD). Meanwhile, combining big interval learning method, we propose the big correlation analysis (BCA). At last, experiments are respectively conducted by using artificial data set and UCI standard data set. The result shows that methods are feasible and effective.
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3D Numerical Simulation of Ice Accretion on a Rotating Surface
Zuodong Mu,Guiping Lin,Lizhan Bai,Xiaobin Shen,Xueqin Bu 한국항공우주학회 2017 International Journal of Aeronautical and Space Sc Vol.18 No.2
A novel 3D mathematical model for water film runback and icing on a rotating surface is established in this work, where both inertial forces caused by the rotation and shear forces due to the air flow are taken into account. The mathematical model of the water film runback and energy conservation of phase transition process is established, with a cyclical average method applied to simulate the unsteady parameters variation at angles of attack. Ice accretion on a conical spinner surface is simulated and the results are compared with the experimental data to validate the presented model. Then Ice accretion on a cowling surface is numerically investigated. Results show that a higher temperature would correspond to a larger runback ice area and thinner ice layer for glaze ice. Rotation would enhance the icing process, while it would not significantly affect the droplet collection efficiency for an axi-symmetric surface. In the case at angle of attack, the effect of rotation on ice shape is appreciable, ice would present a symmetric shape, while in a stationary case the shape is asymmetric.
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