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김정준,김선겸,김영균,장태석,김휘준,김용진,최현주,Kim, Jungjoon,Kim, Sungyeom,Kim, Youngkyun,Jang, Taesuk,Kim, Hwi-jun,Kim, Youngjin,Choi, Hyunjoo 한국분말재료학회 (*구 분말야금학회) 2021 한국분말재료학회지 (KPMI) Vol.28 No.3
Iron-based amorphous powder attracts increasing attention because of its excellent soft magnetic properties and low iron loss at high frequencies. The development of an insulating layer on the surface of the amorphous soft magnetic powder is important for minimizing the eddy current loss and enhancing the energy efficiency of high-frequency devices by further increasing the electrical resistivity of the cores. In this study, a hybrid insulating coating layer is investigated to compensate for the limitations of monolithic organic or inorganic coating layers. Fe<sub>2</sub>O<sub>3</sub> nanoparticles are added to the flexible silicon-based epoxy layer to prevent magnetic dilution; in addition TiO<sub>2</sub> nanoparticles are added to enhance the mechanical durability of the coating layer. In the hybrid coating layer with optimal composition, the decrease in magnetic permeability and saturation magnetization is suppressed.
김승원(Seungwon Kim),김용진(Youngjin Kim),정공섭(Kongsup Jung),허준행(Junhaeng Heo),박선영(Sunyoung Park) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
The Engine Mounting is the system to connect P/trian which happens the vibration at the frame. A main performance insoluates with the vibration and control to the behavior of P/Train. And, the system is examined to the main design parameter which infulence NVH and R&H of the vehicle. Thus, in the case of longitudinal mounted engine, generally, the type of engine mounts is fluid. However, due to the need for continuous improvement in driving performance, TM mount is often applied to the fluid type. but this disadvantage of the package layout is difficult to apply the fluid type. In particular, in case all wheel systems, due to the application of the transfer, structure of TM mount is further disadvantage, and the durability of TM mount is further disadvantage In order to solve the above problems, this paper optimization the optimization process of rubber shape. Becasus of large deformation of the rubber, the design parameters defined the outer curve of the rubber. And, bezier curves cane be reduced to the design parameters. Using bezier curve, the shape optimization was conducted, and can be found the optima in a short time. The durability test’s result were satisfied the specification.
시간 정보를 활용한 Time Aligned-LSTM 사람 행동 예측 연구
홍성은(Seongeun Hong),방준일(Junil Bang),김용진(Youngjin Kim),김화종(Hwajong Kim) 한국정보기술학회 2022 한국정보기술학회논문지 Vol.20 No.10
Recently, as IoT devices are widely spread, many sensors exist and measure various information. the house occupies a large part of a humans life, and various sensors can be installed, making it easy to collect various information. By analyzing the users current location, device usage information, and time information, the users activity, patterns, and habits can be found, and activity prediction enables various services. Users Behavior Prediction In previous studies, the time the behavior occurred is very important, but this information was not used for model training. In this study, we propose a users behavior prediction model that uses occurrence time information in addition to sensor data in a smart home environment. The accuracy of the proposed model was 1.2~5.7% higher than that of Bi-LSTM as a result of using the model input of occurrence time and evaluating model performance in multiple data sets.