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최문석,최인지,장민해,유하늘,Choi, Moonsuk,Choi, Inji,Jang, Minhae,Yoo, Haneul 한국전력공사 2020 KEPCO Journal on electric power and energy Vol.6 No.1
Scheduling of electric vehicles and optimizing for charging waiting time have been critical. Meanwhile, it is challengeable to exploit the fluctuating data from electric vehicles in real-time. We introduce an optimal routing algorithm and a simulator with electric vehicles obeying the Poisson distribution of the observed information about time, space and energy-demand. Electric vehicle routing is updated in every cycle even it is already set. Also, we suggest an electric vehicle routing algorithm for minimizing total trip time, considering a threshold of the waiting time. Total trip time and charging waiting time are decreased 34.3% and 86.4% respectively, compared to the previous algorithm. It can be applied to the information service of charging stations and utilized as a reservation service.
HPLC를 이용한 생체 시료중의 새로운 플라보노이드 유도체인 DA-6034의 분석
이종진,손미원,유무희,장민선,김원배,이강춘 성균관대학교 약학연구소 1998 成均藥硏論文集 Vol.10 No.1
A high performance liquid chromatographic method was developed for the determination of DA-6034 in biological fluids using internal standard. Plasma containing DA-6034 and internal standard was extracted by liquid-liquid extraction at an acidic pH. After evaporation of the organic layer, the drug and internal standard were reconstituted with mobile phase and injected into the column. They were separated by high performance liquid chromatography on inertsil ODS Ⅱ column at 334㎚. The detection limit of DA-6034 in plasma was 0.02㎍/㎖. In this method, the range of recovery and coefficients of variation were 96∼110% and 0.40∼3.78%, respectively. There was no interference from endogenous substances. Urine and bile were analysed using the deproteinization method and the detection limit of DA-6034 was 1㎍/ℓ.
50nm 급 낸드플래시 메모리에서의 Program/Erase 스피드 측정을 통한 트랩 생성 분석
김병택,김용석,허성회,유장민,노용한,Kim, Byoung-Taek,Kim, Yong-Seok,Hur, Sung-Hoi,Yoo, Jang-Min,Roh, Yong-Han 한국전기전자재료학회 2008 전기전자재료학회논문지 Vol.21 No.4
A novel characterization method was investigated to estimate the trap generation during the program /erase cycles in nand flash memory cell. Utilizing Fowler-Nordheim tunneling current, floating gate potential and oxide electric field, we established a quantitative model which allows the knowledge of threshold voltage (Vth) as a function of either program or erase operation time. Based on our model, the derived results proved that interface trap density (Nit) term is only included in the program operation equation, while both Nit and oxide trap density (Not) term are included in the erase operation equation. The effectiveness of our model was tested using 50 nm nand flash memory cell with floating gate type. Nit and Not were extracted through the analysis of Program/Erase speed with respect to the endurance cycle. Trap generation and cycle numbers showed the power dependency. Finally, with the measurement of the experiment concerning the variation of cell Vth with respect to program/erase cycles, we obtained the novel quantitative model which shows similar results of relationship between experimental values and extracted ones.
HPLC를 이용한 생체시료중의 새로운 플라보노이드 유도체인 DA-6034의 분석
이종진(Jong Jin Lee),손미원(Mi Won Son),유무희(Moo Hi Yoo),장민선(Min Sun Jang),김원배(Won Bae Kim),이강춘(Kang Chun Lee) 대한약학회 1998 약학회지 Vol.42 No.2
A high performance liquid chromatographic method was developed for the determination of DA-6034 in biological fluids using internal standard. Plasma containing DA-6034 and internal standard was extracted by liquid-liquid extraction at an acidic pH. After evaporation of the organic layer, the drug and internal standard were reconstituted with mobile phase and injected into the column. They were separated by high performance liquid chromatography on inertsil ODS II column at 334 nm. The detection limit of DA-6034 in plasma was 0.02 mcg/ml. In this method, the range of recovery and coefficients of variation were 96-110% and 0.40-3.78%, respectively. There was no interference from endogenous substances. Urine and bile were analysed using the deproteinization method and the detection limit of DA-6034 was 1mcg/l.