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Qi Gao,Xiaoyu Xing 한국무역연구원 2023 무역연구 Vol.19 No.1
Purpose – The purpose of this paper is to analyze the impact of chatbot characteristics on customer satisfaction and reuse intention. Design/Methodology/Approach – The study collected data from 259 customers with experience using chatbots on online shopping malls. Statistical programs SPSS 27.0 and AMOS 26.0 were used for data analysis in this study. The empirical analysis consisted of frequency analysis, reliability analysis, confirmatory factor analysis, and hypothesis testing, in that respective order. Findings – The results showed that chatbot characteristics (empathy, intimacy, accuracy, ease of use, social presence) and the relationship between customer satisfaction had a positive effect, and customer satisfaction had a positive effect on chatbot reuse intention. In addition, hedonic motivation showed a moderating effect on the relationship between accuracy, ease of use, and customer satisfaction, and utilitarian motivation showed a moderating effect on the relationship between accuracy and customer satisfaction. Research Implications – This paper divided the characteristics of chatbots into empathy, intimacy, accuracy, ease of use, and social presence, which provides a theoretical framework for future research on chatbots, and has certain reference value. The importance of consumer psychological variables is confirmed by analyzing hedonic motivation and utilitarian motivation as moderating variables. In addition, the results of this study are of great significance to the application and improvement of chatbots utilized by online shopping mall companies. In the online shopping mall environment, retailers can use chatbots as a communication supplementary strategy to participate in customer service and improve the efficiency of the customer shopping experience.
Research on sub-surface recrystallization of single crystal nickel-based superalloy in micro-milling
Qi Gao,Po Jin,Ming Cai 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.7
The micro-structure/parts of single crystal nickel-based superalloy materials are extensively used in high temperature environments. The recrystallization mechanism of the machined workpiece sub-surface is explained through energy storage model. A micro-milling experiment of single crystal nickel-based superalloy DD98 was performed by simulating the working environment at high temperature and setting different heat treatment temperature. By scanning electron microscopy (SEM), the influence of sub-surface structural elements on the properties of micro-milling workpiece was analyzed. Experimental results indicate that the recrystallization layer thickness of single crystal nickel-based superalloy DD98 increases with the increase of heat treatment temperature. When this temperature is between 950 °C and 1150 °C, the recrystallization thickness is 5-20 µm. The recrystallization of sub-surface layer takes the form of equiaxed recrystallization. Those provide basic data for restraining recrystallization of single crystal materials and have good scientific significance.
Qi Gao,Yuanfang Cheng,Chuanliang Yan 한국자원공학회 2020 Geosystem engineering Vol.23 No.1
Separate layer fracturing (SLF) technique is the prevailing method for stimulating multi-thin layered reservoirs (MTLRs) whereas the production record reveals that not all wells show good performance after being fractured. The primary cause for this phenomenon can be attributed to the complex geometry of the created hydraulic fractures. For better understanding the problem, we establish a new geomachanical model based on the extended finite element method (XFEM) and cohesive zone method (CZM), to investigate the fracture propagation in MTLRs under SLF. Reverse faulting stress regime is considered. In the simulation procedure, horizontal hydraulic fractures (HHFs) are created sequentially from the bottom up along a vertical wellbore. The results show that later created HHFs will propagate out of the pay zones or probably enter the water or gas-bearing layers if the fracturing time is not reasonably controlled. The fracture initiation pressure (FIP) and fracture propagation pressure (FPP) present larger values when stimulating the upper formations, and the deviation of later created HHFs can lead to the building up of FPP. Parametric studies indicate that larger injection rate and shallower reservoir depth yields longer and wider HHFs while smaller injection rate, shallower reservoir depth and thicker barriers results in lower FIP and FPP.
PROBLEMS AND PROSPECT OF PUBLIC PARTICIPATION IN ENVIRONMENTAL DECISION-MAKING IN CHINA
Gao Qi 충북대학교 법학연구소 2014 과학기술과 법 Vol.5 No.1
In light of the current dysfunctional environmental governance regime in China and the growing popularity of deliberative democracy across the world, this paper identifies and evaluates the development of public participation at three different levels of environmental decision-making in China, namely (1) laws and executive regulations; (2) plans and policies; (3) and specific activities. Having examined the background for promoting public participation in China, specific issues are discussed at length, for example, the timing of participation, time frame allowed for public comments, information provided for the public, the forms of participation, the review and feedback on public opinions. Moreover, since effective public participation requires a strengthened and vibrant civil society, legal and political obstacles against the development of civil society are identified. Discussions also incorporate other relevant procedural rights for their notable impact on the compliance of public participation requirements, especially with regard to information transparency and access to justice. As a basic conclusion, the piecemeal feature of public participation in China is highlighted. This observation is further explained from several perspectives in the conclusion and recommendations will be given accordingly.
Name and Maintain Topological Faces in Rotating and Scanning Features
Gao Xue-Yao,Li Jia-Qi,Guo Hao,Gao Yun-Feng,Liu Yu-Hong 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.3
Features created in rotating and scanning operations are very complex. Naming and identifying their topological faces is an important problem in CAD fields. In this paper, a new method of coding topological faces in rotating and scanning features is proposed. Firstly, contour segments are numbered. Secondly, an angle between contour segment and rotating axis is computed. Thirdly, all topological faces are named based on contour segments’ numbers, rotating axis and other information. When a face splits and several subfaces merge, a method of processing their codes is given. The proposed method is applied to HUST-CAID feature modeling system. Experimental results show that it can name and identify topological faces effectively in operations.
Qi Gao,Yadong Gong,Yunguang Zhou,Xuelong Wen 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.1
Micro-milling is widely used as a method for machining of micro-parts with high precision and efficiency. Taking the nickel-based single-crystal superalloy DD98 as the research object, the crystal characteristics of single-crystal materials were analysed, and the removal mechanism of single-crystal micro-milled parts was described. Based on molecular dynamics, a simulation model for nickel-based single-crystal superalloy DD98 micro-milling was established. Based on the response surface method of central composite design, the influences of spindle speed, feed rate, and milling depth on the surface roughness were examined, and a second-order regression model of the DD98 surface roughness was established. Using analysis of variance and the residuals of the model, a significant influence on surface roughness was found in the following order from large to small: Feed rate, spindle speed, and milling depth. Comparisons were conducted between the micro-milling experimental values and the predicted model values for different process parameters. The results show that the model fit is relatively high, and the adaptability is good. Scanning electron microscopy analysis of the micro-milling surfaces was performed to verify the slip and the removal mechanism of single-crystal materials. These results offer a theoretical reference and experimental basis for micro-milling of single-crystal materials.