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Qiuyue Du,Song Chen,Shuo Cheng,Fengshan Du,Liang Li,Quantong Li,Limei Zhang 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.6
The integrated electric wheel module (IEWM) with large-angle steering capability is blooming which greatly alters the conventional chassis structure over recent years. The IEWM brings challenges to the suspension system due to higher requirements, which includes 360 degrees steering, active adjustment of chassis height and posture, superior ride comfort, and compact mechanical structure. Hence, a novel double trailing arm suspension mechanical system for the aforementioned IEWM and its control strategy are studied to get better driving maneuverability, ride comfort, driving safety, and posture stability of automobiles in this paper. The 6 degree of freedom (DOF) roll model of active suspension vibration with seats and multiobjective optimization controller are constructed for vehicle posture active control to solve the difficult trade-off between suspension dynamic deflection, roll angle, and seat vertical acceleration. The controller weight coefficients are optimized by an improved genetic algorithm (IGA) method, and the fitness function in piecewise form is adopted to reduce the search range. The simulation analysis shows that the combination of IGA and a multi-objective controller can defuse the conflict of goals between different suspension performance evaluation indexes, which also improves the overall suspension performances compared with the experience adjustment method and passive suspension system. In detail, this simple optimization control strategy can reduce the vertical acceleration root mean square value (RMSV) of the left and right seat by 45 % and 11 %, respectively; the left and right tire dynamic load decreased by 13 % and 2 %, respectively; and 25 % reduction in roll angle. These performance improvements only sacrifice part of suspension dynamic deflection RMSV increase, but do not affect driving safety.
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김채린 ( Chae-reen Kim ),박주현 ( Joo-hyun Park ),두추월 ( Du-qiuyue ),박두순 ( Doo-soon Park ) 한국정보처리학회 2014 한국정보처리학회 학술대회논문집 Vol.21 No.2
최근 들어,많은 추천시스템들이 연구 되고 있으며,대부분은 개인 맞춤형 추천 시스템이 연구되고 있다. 기존의 영화추천시스템에서는 희박성의 문제가 제기된다. 본 논문에서는 희박성에 대헤 보안하 고자,개인리뷰에 대한 가중치를 활용한다. 그 결과 사용자에게 정보의 제공에 대해 효율성을 높이고, 사용자마다 영화에 대한 리뷰에 따른 감정 및 사용자의 정보들을 반영한 영화추천시스템을 설계 및 구현한다.
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Ji-Eun Hwang,Su-Gyeong Jeon,Kil-Su Jang,Oh-Hun Kwon,Tae-Young Kwon,Hongjin Long,Min Gui,Qiuyue Zhong,Lei Du 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07
Fruit quality traits like heat, color and flavor are unique and important for pepper cuisines and industrial use. Pepper pigments include chlorophyll, carotenoids, anthocyanin and red pigments like capsanthin are unique carotenoids to capsicum spp. So developing carotenoids-rich peppers and use of red pigments extraction along with capsaicinoids are one of interest pepper breeding goals in the world. Horticultural traits of 113 germplasms introduced by international cooperative research with YASS of China were evaluated to select promissing materials for high quality peppers during the past 3 years. All of germplasms including 60 local peppers were belong to C. annuum and fruit characteristics were diverse. Especially fruit chemical compositions like ASTA color, capsaicinoids and sugars were evaluated compared with korean commercial peppers. Average contents of ASTA color was 98±37, 55±63mg in capsaicinoids and 12±6% in total sugars. ASTA color which generally means red pigments content was over 120 in 25 germplasms including over 200 in 2 germplasms. Higher ASTA colors were observed in different fruit types. Capsaicinoids content was over 90mg/100g in 24 germplasms including 5 germpalsms over 200mg. Especially higher capsaicinoids were higher in local peppers with round and wrinkled fruit shape. And total sugar content was over 20% in 10 germplasms. Germplasms of different fruit shapes and characteristics will be useful materials for diverse fruit quality breeding.
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