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Zhaoxi Zhao,Yukui Wang,Zhen-long Wang,Jianyong Liu 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.2
Thermal error is a major factor influencing the accuracy of large precision electrical discharge machining (EDM) machine tools, especially when processing continuously for a long time. In this paper, a novel thermal analysis model was set up to identify the static and dynamic thermal behaviour of the large EDM machine tool. The thermal effect of multiple spark discharges is considered. An equivalent heat flux method was proposed to model the intermittent heat flux for the first time. Both the steady and transient analyses were applied to investigate the thermal equilibrium time of critical points. It is found that when the study point is far away from the heat source, the longer thermal equilibrium time is needed. And the thermal equilibrium time of the machine tool was also estimated. Verification experiment has been performed, indicating the simulation accuracy of 87 % on the temperature rise of the electrode. Moreover, on the displacement of the spindle, the simulated result matched with the experimental result in Z direction error of 7 %. Finally, suggestions for reducing the thermal deformation were proposed to further improve the machining accuracy of large EDM machine tools.
항공 서비스품질과 소비관련 감정이 고객만족과 재구매의도에 미치는 영향에 관한 연구
이용진 ( Long Zhen Li ),어문영 ( Wen Ying Yu ) 한국항공경영학회 2010 한국항공경영학회지 Vol.8 No.3
This study investigate perceived airline service quality and consumption emotion which classified into pre-consumption emotion and post-consumption emotion, on customer satisfaction and repurchase intention. Using survey date from 363 customers, the result reveals pre- consumption emotion positively relate to post-consumption emotion and perceived airline service quality, but no effect on customer satisfaction. we also find post-consumption emotion positively relate to customer satisfaction, but no effect on repurchase intention. In addition, we find perceived airline service quality positively relate to post-consumption emotion and customer satisfaction, but not significantly relate to repurchase intention and customer satisfaction positively effect on repurchase intention. These results suggest that airline managers must pay attention to not only cognitive factors but also experiential aspects of airline service.
중국진출 한국기업에서 인사부서의 전략적 참여, 경쟁전략, 몰입형 인사시스템 및 기업성과간의 관계
이용진(Li, Long Zhen),김성수(Kim, Seongsu) 한국인사관리학회 2010 조직과 인사관리연구 Vol.34 No.2
본 논문은 중국에 진출한 한국기업들을 대상으로 인사부서의 전략적 참여와 몰입형 인사시스템 및 기업성과 간의 관계를 연구하였다. 그리고 경쟁전략이 몰입형 인사시스템에 미치는 직접영향을 검증하고 또한 경쟁전략이 인사부서의 전략적 참여와 몰입형 인사시스템 간에 미치는 조절효과를 검증하였다. 연구 자료는 한국기업들이 가장 많이 진출한 중국 산동성 연태, 위해, 청도 지역에서 50인 이상을 고용하고 있는 130개 기업이었다. 회귀분석법을 채택하여 자료를 분석하였으며, 연구결과는 다음과 같다. 인사부서의 전략적 참여는 몰입형 인사시스템의 활용을 높이는 것으로 나타났으며 경쟁전략에서 차별화전략의 추구는 몰입형 인사시스템의 활용을 높이는 것으로 나타났다. 그리고 몰입형 인사시스템의 활용은 기업성과를 높이는 것으로 나타났다. 또한 가설과 달리, 원가우위전략을 활용할수록 인사부서의 전략적 참여가 몰입형 인사시스템의 활용을 높이는 것으로 나타났는데, 이는 중국진출 한국기업의 특수성과 관련되는것으로 보인다. 이러한 연구결과를 바탕으로 본 연구의 시사점과 한계 및 향후의 연구과제를 논의하였다 In this paper, we studied the relationship between HR involvement and Firm performance at Korean firms operating in China. We also examined the competitive strategy's impact on commitment-based HR system and tested the competitive strategy's moderation effect within the HR involvement with commitment-based HR system. To test hypotheses, we collected data from Korean firms with over 50 employees operating in Yantai, Weihai, Qingdao in Shandong Province of China. Questionnaires were sent to 200 firms and 139 firms replied to the survey. After dropping questionnaires that contained missing items, the final sample size for this study used was 130. We used hierarchical regression analyses. Research results are as follows. Both HR involvement and competitive strategy have positive relationship with commitment-based HR system. Also the commitment-based HR system has positive relationship with firm performance. Competitive strategy was found to moderate the relationship between HR involvement and commitment-based HR system. We also discussed research implications and described future research directions.