http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Effects of initial parameters on the internal-melt ice-on-tube while icing
Bingxi Li,Xinhai Xu,Yi Liu,Linhua Liu 대한기계학회 2009 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.23 No.7
Numerical simulation method is widely used in studying ice-storage process in an ice-storage system. In this paper, the three-dimensional dynamical mathematical model of the ice-storage process in a single tube is established and the process is solved by the enthalpy method. Effects on the performance of heat-exchange, caused by variation of velocity of the refrigerant, inner diameter of the tube, initial temperature of the external water and inlet temperature of the refrigerant, are simulated and analyzed.
Bingxi Zhao,Qi Yuan,Pu Li 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.1
Manufacturing errors of disks, namely, parallelism error and mass imbalance, cause complex bending and unbalance of rod-fastened rotor (RFR) after assembly, which act as original excitations and increase vibration. A method was introduced in this study to improve the vibration performance of an RFR. The method optimized the distribution of bending and unbalance and offered an improved assembly scheme. As a basic step, the quantitative relation of RFR bending and assembly angles of disks with parallelism errors was established. On this basis, dimensionless bending was proposed to evaluate the integral bending of an RFR. With respect to the unbalance of the RFR, the balance principle of rigid rotor was applied, that is, small equivalent reaction forces were considered better. The dynamic model of an RFR supported by elliptic bearings was established by using finite element method. Optimizations on the bending and unbalance were then performed individually, and related vibration responses of the RFR system were investigated. Results of single optimization on bending and unbalance proved the effectiveness in reducing the vibration responses of the RFR system. Moreover, results revealed that the bending and unbalance induced mainly the vibration of first order, which explained the difficulty to distinguish each other in actual balance of an RFR. Finally, the multioptimization on the bending and unbalance was performed, which greatly decreased the vibration responses of the RFR system. Optimizations on bending and unbalance in this study were independent with supporting conditions, which gave them a better application and provided a new way to improve the dynamic performance before assembly.
김민선(Minseon Kim),조린(Lin Cho),임수민(Sumin Lim),Li Bingxi,구명완(Myoungwan Koo) 한국방송·미디어공학회 2022 한국방송공학회 학술발표대회 논문집 Vol.2022 No.11
본 논문에서는 네일 아트를 한 손 이미지가 주어졌을 때 손톱에 있는 네일 아트의 컬러를 자동으로 분류해주기 위한 시스템을 제안한다. 네일 아트 컬러 자동 분류기는 Object Detection 모델을 이용하여 인풋으로 들어오는 손 이미지에서 손톱 영역을 찾고, 각 손톱에 대하여 13 가지 컬러 중 하나로 분류한 결과를 아웃풋으로 반환한다. 본 프로젝트에서는 사용자가 요청하는 네일 아트 손 이미지에 대하여 컬러 라벨링 결과를 반환해주는 API 형태의 서비스를 제안하며, 반응형 웹을 통해 시연 가능하도록 시스템을 설계 및 구현하였다.