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Jang, Hong Seok,Kang, Ki Mun,Choi, Byung Ock,Chai, Gyu Young,Hong, Soon Chan,Ha, Woo Song,Jirtle, Randy L WJG Press 2008 World journal of gastroenterology Vol.14 No.9
<P>To investigate the relationship between loss of heterozygosity (LOH) for mannose 6-phosphate/insulin-like growth factor 2 receptor (M6P/IGF2R) and the outcomes for primary HCC patients treated with partial hepatectomy.</P>
경제성 분석을 통한 산업용 수용가의 ESS 설치 용량 산정
홍종석(Jong-Seok Hong),채희석(Hui-Seok Chai),문종필(Jong-Fil Moon) 대한전기학회 2015 전기학회논문지 P Vol.64 No.4
In this paper, ESS capacity installed in industrial customer is calculated using economic analysis. To do this, electric charge for industrial customer is analyzed and power management system(PMS) of ESS is selected. Reduction of kW cost and kWh cost are set to ‘benefit’ according to operation of ESS. Also, installation cost and maintenance cost of ESS are set to ‘cost’. Proper ESS capacity is determined as a result of benefit-to-cost(B/C) analysis according to the variation of ESS installation cost. In case study, B/C is analyzed for the specific industrial customer and minimum capacity of ESS to make a profit are proposed for the customer.
홍종석(Jong-seok Hong),채희석(Hui-seok Chai),강병욱(Byoung-wook Kang),김태형(Tae-hyeong Kim),김재철(Jae-chul Kim) 대한전기학회 2015 전기학회논문지 Vol.64 No.7
The ESS is composed of Battery Package, PCS(Power Conditioning System) Package, BCU(BESS Control Unit). In Jeju smart grid test-bed, we have developed a business model by ESS power system, renewable energy, transportation, such as customers, and have demonstrated above things. We have analyzed the EMS(Energy Management System) model of KPX where manages supply and demand of domestic electrical power system. We modified and launched EMS for microgrid but the cost was expensive and the system was large size. For releasing this system from industry as a whole, it is imperative to develop PMS(Power Management System) for microgrid. However, the cost of EMS for microgrid is expensive, some systems because it is a large development of the all of the first fruits in urgent PMS(Power Management System) for microgrid to be used in industry in general. Therefore, in this paper, we propose the ESS model considering the power systems characteristics and extensibility in korea. and also we propose the PMS to manage the ESS systems.
에너지저장장치 도입 시 비예측 알고리즘의 경제성 분석에 관한 연구
홍종석(Jong-Seok Hong),강병욱(Byoung-Wook Kang),채희석(Hui-Seok Chai),김재철(Jae-Chul Kim) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.5
Prediction algorithm of the energy storage system in accordance with the load pattern can cause economic loss in case of a failure prediction. In addition, algorithm that uses TOU(Time of Use) based on the revelation by the power electric charge which covers most simply is an inefficient operation because it is only for the purpose of reducing the peak power. In this paper, we introduced a non-prediction algorithm with a conventional TOU in order to solve this problem operating the energy storage system economic and efficient.
Modeling and Simulation for a Tractor Equipped with Hydro-Mechanical Transmission
( Seok Hwan Choi ),( Hyoung Jin Kim ),( Sung Hyun Ahn ),( Sung Hwa Hong ),( Min Jae Chai ),( Oh Eun Kwon ),( Soo Chul Kim ),( Yong Joo Kim ),( Chang Hyun Choi ),( Hyun Soo Kim ) 한국농업기계학회 2013 바이오시스템공학 Vol.38 No.3
Purpose: A simulator for the design and performance evaluation of a tractor with a hydro-mechanical transmission (HMT) was developed. Methods: The HMT consists of a hydro-static unit (HSU), a swash plate control system, and a planetary gear. It was modeled considering the input/output relationship of the torque and speed, and efficiency of HSU. Furthermore, a dynamic model of a tractor was developed considering the traction force, running resistance, and PTa (power take off) output power, and a tractor performance simulator was developed in the co-simulation environment of AMESim and MATLAB/Simulink. Results: The behaviors of the design parameters of the HMT tractor in the working and driving modes were investigated as follows; For the stepwise change of the drawbar load in the working mode, the tractor and engine speeds were maintained at the desired values by the engine torque and HSU stroke control. In the driving mode, the tractor followed the desired speed through the control of the engine torque and HSU stroke. In this case, the engine operated near the OOL (optimal operating line) for the minimum fuel consumption within the shift range of HMT. Conclusions: A simulator for the HMT tractor was developed. The simulations were conducted under two operation conditions. It was found that the tractor speed and the engine speed are maintained at the desired values through the control of the engine torque and the HSU stroke.