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- 저자 : Xiaobin Guo (검색결과 5 건)
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Xiong Wei,Xiaobin Liu,Bing Guo,Shen Yan,Wenli Zhang 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.3
As embedded devices prevail in daily life, high energy consumption caused by embedded software caught academic attentions. Multifarious testing and predicting methods are developed accordingly. This paper proposes a model about energy consumption of embedded device based on analysis of embedded software structure and support vector machine regression. The nonlinear relationship between energy consumption and software structure is revealed. The research finds software structure is determined by features like number of components, complexity of component interface, component coupling, and path length. These features are qualified and modeled by using support vector machine regression and energy consumption is predicted based on this model. The experiments results confirm the proposed model.
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Xuehong Xu,Yunlai Deng,Xiaobin Guo,Qinglin Pan 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.7
The influence of the asymmetric rolling process (ASR) and thickness reduction on the microstructure and mechanical propertiesof Al–Mg–Si alloys is studied. The specimens of the ASR and higher thickness reduction show higher strength (both theultimate tensile strength and yield strength) and lower elongation (El). However, both the strength and El are reduced withthe increase of the rotation speed ratio (ω1/ω2) in the specimens treated by the ASR. The grain size, density of dislocations,volume fraction of deformation texture and number density of precipitates are the main reasons causing the difference instrength and El. The increment in strength is mainly due to the increase of deformation texture, density of dislocations duringthe cold rolling and number density of precipitates formed during subsequent ageing. The reduction of volume fractionof deformation texture and number density of precipitates are responsible for the decrease of the strength in the specimenstreated by the ASR. The high-density dislocations in turn provide little room for the accumulation of dislocations and thereforereduces the EI.
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Manfa Yuan,Yunlai Deng,Sen Lin,Xiaobin Guo,Yuankang Xie 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.9
In this work, Al–Mg–Si/Al–Zn–Mg laminated composite sheets were successfully produced first time by combining AA6082and AA7204 sheets through the cross accumulative roll bonding process. Two different starting materials were rolling bondedas alternate layers up to 8 rolling cycles with 408 °C pre-heating for 20 min before each cycle. In-situ corrosive surface wascharacterized by the electron backscattered diffraction to study the relationship between the grain orientation and the corrosionbehavior of Al–Mg–Si/Al–Zn–Mg composite sheets. 78.2% of the volume fraction of S-type ({123} <634>) texture,46.0% of R-Cubic-type ({001} <110>) texture and 18.8% of Brass-type ({110} <112>) texture reduced during in situ corrosivetests. Corrosion results indicated that the excellent corrosion resistance mainly contributed from grains near Brass-typetexture ({110} <112>). As the volume fraction of the Brass-type ({110} <112>) texture distributed in the Al–Zn–Mg alloyaround the interface increased from 0.18 to 4.16% with the rolling reduction increased from 93.7 to 99.2%, the corrosionresistance of the laminated rolling material improved.
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Manfa Yuan,Jin Zhang,Yunlai Deng,Xiaobin Guo,Liqun Guan 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.5
Noteworthy ductility Mg-8Gd-4Y-1Nd-0.5Si (wt.%) alloy with a strong non-basal texture was developed by 12 passes ofmulti-directional forging (MDF) combine with extrusion. The slip trace analysis indicated that deformation mechanism after3 passes of MDF and extrusion were basal < a > , pyramidal < a > and pyramidal < c + a > slips. The intensity of non-basaltexture increased from 5.37 to 8.03 with the MDF passes increased from 3 to 12, which means grain orientation tends tobe more consistent and makes the basal < a > slips easy to pass through grain boundaries to accommodate ductility. Withmore basal < a > slips crossing the grain boundaries, dislocation interaction in grain interior caused stress accumulation,exceeding the critical shear stress (CRSS) of slips with low schmidt factor (SF), and multiple slips appeared. The activationof slip cross grain boundary and multiple slip improved the elongation from 14.7% to 25.6% of MDFs-extruded Mg-8Gd-4Y-1Nd-0.5Si alloy.
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Liqun Guan,Yunlai Deng,Yaofeng Luo,An Luo,Xiaobin Guo 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.10
In this study, low-cost Si was added to an Mg–8Gd–4Y–1Nd–0.5Zr alloy to regulate the intermetallic phases. The mechanicalproperties of 0, 0.5, and 1.0 wt% Si-added alloys were studied to explore the trade-off between the elastic modulus andstrength. The microstructures were characterized through metallographic microscopy, scanning electron microscopy applyingenergy dispersive spectroscopy, and transmission electron microscopy. The microstructures demonstrated that Y5Si3and GdSi phases formed and consumed the solid soluble Gd and Y elements, thus reducing the amount of precipitation andincreasing the size of the β′ phase. Correlations between the elastic modulus and the intermetallic phase indicated that theY5Si3and GdSi phases formed by the addition of Si were the mainly responsible for the improvement in the elastic modulus. The change in strength through the addition of Si was calculated, and the results revealed that such an addition could increasethe elastic modulus but with a reduction in the alloy strength. The addition of 0.5 wt% Si alloy resulted in a relatively highcomprehensive performance, with an elastic modulus of 46 GPa, a tensile strength of 278 MPa, a yield strength of 226 MPa,and an elongation of 4.9% under a cast-T6 state.
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