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- 저자 : Junwei Duan (검색결과 4 건)
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온라인 반품 행동요인에 대한 소비자 귀인 및 인지부조화의 영향 : 중국 산동성(山東省) 소비자를 중심으로
조군위(Junwei Zhao),단몽가(Mengge Duan),박현정(Hyun-Jung Park) 한국무역연구원 2021 무역연구 Vol.17 No.1
in the online market where the scale of shopping and returns is expanding rapidly. Based on the research on attribution theory;cognitive dissonance and product return behaviors;this thesis aims to help enterprises grasp consumers’ psychology and understand the causes of product return behavior. Design/Methodology/Approach Internal attribution and external attribution of dissatisfaction of purchase may lead to cognitive dissonance in the product or purchase behavior itself as well as emotional dissonance including regret;anxiety and many other psychological factors affecting product return behaviors. This paper conducted a questionnaire survey on 338 consumers who have actual return experience in Shandong Province of China. The data collected were analyzed with SPSS 26.0 and AMOS 24.0 to verify the impact of attribution and cognitive dissonance on the return reasons. Findings External attribution was more likely to cause product and emotional dissonance. Product dissonance increased emotional dissonance and the both types of cognitive dissonance had positive impacts on the reasons for product returns of “expectation not met” and “finding better”. Research Implications Results indicate that managers of online shopping sites need to find various ways to reduce internal attribution and product dissonance to minimize emotional dissonance associated to product returns.
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Buckling Modes of Cold-Formed Thin-Walled Steel Beams Under Different Impact Positions
Chang Wu,Junwei Duan,Renhong Wang,Ziheng Yang 한국강구조학회 2023 International Journal of Steel Structures Vol.23 No.1
This paper aims to study the buckling mode of cold-formed thin-walled channel steel beams under different impact positions. The impact test of the thin-walled channel steel beams was carried out using a drop hammer to obtain the acceleration of the measuring point and the buckling mode of the member. The experimental results and ANSYS/LS-DYNA numerical simulation results are compared and analyzed. The results show that the acceleration curve change trend obtained from the test is similar to numerical simulation. The difference between the acceleration obtained by numerical simulation and the maximum value obtained by test accounts for 5.86% of the simulated value. Therefore, the dynamic response results of cold-formed thin-walled channel steel beams under numerical simulation can be effectively verified by the test. Numerical simulation methods are used to analyze the dynamic response of two groups of members under impact at different positions and the corresponding buckling modes. The results show that the buckling of the members at 1/2, 1/3, and 1/4 of the flange of the impact member is similar to the O-I mode under the same conditions. The buckling mode is half-O mode when the midpoint of the intersection line between flange and web is impacted. The buckling mode is U-shaped when the midpoint of the intersection line between flange and the curling edge is impact.
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Measurement of TOF of fast neutrons with <sup>238</sup>U target
Li, Meng,Guan, Yuanfan,Lu, Chengui,Zhang, Junwei,Yuan, Xiaohua,Duan, Limin,Yang, Herun,Hu, Rongjiang,He, Zhiyong,Wei, Xianglun,Ma, Peng,Gan, Zaiguo,Yang, Chunli,Zhang, Hongbin,Chen, Liang,Qiu, Tianli Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.6
We developed a Dual-PPACs detector for fast neutron measurements that consists of two sets of PPAC: conventional PPAC and fission PPAC. A<sup>238</sup>U(U<sub>3</sub>O<sub>8</sub>) coating is placed in the fission PPAC's anode, which is used as the neutrons conversion layer. An experiment was performed to measure neutron time-of-flight (TOF) in which <sup>252</sup>Cf spontaneous fission source was used. An excellent time resolution of 164ps has been observed at 6 mbar in isobutene gas. With the excellent time resolution of Dual-PPACs detector, exact neutron energy can be extracted from the timing measurement. The experimental detection efficiency was 1.9 × 10<sup>-7</sup>, consistent with the efficiency of 2.5 × 10<sup>-7</sup> given by a Geant4 simulation. Ultimately, the results show that the Dual-PPACs detector is a suitable candidate for measuring fast neutrons in the future CiADS system.
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Development of Parallel Plate Avalanche Counter for heavy ion collision in radioactive ion beam
Wei, Xianglun,Guan, Fenhai,Yang, Herun,Wang, Yijie,Zhang, Junwei,Ma, Peng,Diao, Xinyue,Lu, Chengui,Li, Meng,Guan, Yuanfan,Duan, Limin,Hu, Rongjiang,Zhang, Xiuling,Xiao, Zhigang Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.3
We have developed a position-sensitive Parallel Plate Avalanche Counter (PPAC) to detect the fission fragments and reconstruct the fission reaction plane in the experiment of studying nuclear equation of state (nEOS) by means of heavy ion collision (HIC). This experiment put forward high requirements for the performances of PPAC, such as the time resolution, efficiency and position resolution. According to these requirements we designed the PPAC with an active area of 240 mm × 280 mm working at low gas pressure. The results show that time resolution could be less than 300 ps. Position resolution is consistent with the theoretical calculation about 1.35 mm. Detection efficiency could be approaching 100% gradually with the voltage increasing in different gas pressures. The performances of PPAC have also been verified in beam experiment. Each set of anode wires can be accurately separated in the position spectrum. In the beam experiment, we also got the back-to-back correlation of fission fragments which is one of the direct signals characterizing binary decay.
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