http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
MATLAB을 이용한 자동차 엔진모델 설계 및 시뮬레이션
장종승,설재훈,김승철,임영도 東亞大學校 附設 情報通信硏究所 1997 情報通信硏究所論文誌 Vol.5 No.1
Detailed model of longitudinal dynamics of a typical automobile is developed. A nonlinear controller is designed for speed control of the automobile. This paper discribes the first step of a vehicle model design which designs a engine model. The design of a vehicle engine designs Matlab Simulink, and control which is compared describes characteristics be using Fuzzy and PID.
폴라로그래피법에 따른 各種 金屬의 電解還元 反應機構의 解析
張哲鉉,朴勝祚 大田工業大學 1992 한밭대학교 논문집 Vol.9 No.1
Using the current-potential equation of the following two cases of E-E mechanism based on an expanding electrode model, were studied the reduction mechanisms of various metals. ◁그림 삽입▷ (원문을 참조하세요) And the logarithmic analysis of the average current-potential curves are carried out in the case of single wave being obtained. The results of this study showed that Lead(Ⅱ) is the case of both charge transfer steps being reversible(R-R CASE), Cadmium(Ⅱ) and Manganese(Ⅱ) are the case of first charge charge trasfer step being reversible while the second step being irrevers- ible(R-I CASE) and Hickel(Ⅱ) rlnd Cobalt(Ⅱ) are case of the first charge transfer step being irreversible and the second charge transfer step being reversible(I-R CASE ).
充塡複極槽에 의한 黃酸구리및窒酸카드뮴 廢液의 電解處理 (Ⅰ)
朴勝祚,崔鍾楨,張哲鉉 동아대학교 환경문제연구소 1986 硏究報告 Vol.9 No.1
The objective of this study is to review charateristics of mono and bipolar electrolytic cell in various packing materials, applied valtages and material size. In this paper, we were investigated in the case of the electrolysis of CuSO₄ and Cd(NO₃)₂ solution under different conditions. When the electrolysis was carried out in the cell packed activated carbon from coconut shell, the reaction rate and particile size were increased, the reaction rate increased and metal deposited on packed material. The electrolytic treatment efficiency was over 98% when electrolysis were carried out at 20 voltages during 3 hours.
심장수술 시 농축적혈구, 자가수혈기 혈액, 체외 순환기 혈액에서의 유리 혈색소 농도 비교
송장호,구승우,백종화,정용보,이정순,최인철 대한마취과학회 2002 Korean Journal of Anesthesiology Vol.43 No.5
Background: Intraoperative autotransfusion or residual blood in a cardiopulmonaty bypass (CPB) circuit has been used to reduce the need for an homologous blood transfutsion during cardiac surgery. However, it may contain some free hemoglobin released from damaged cells. The load of blood containing free hemoglobin may cause renal dysfunction. We measured the amount of free hemoglobin in backed blood, cell saver blood and CPB blood to evaluate what is the least hemolytic blood transfused in cardiac surgery. Methods: This study was performed in 20 patients undergoing cardiac surgery. In each patient, the banked blood, intraoperative salvaged blood with a cell saver and CPB residual blood were sampled at the end of the operation. The concentration of free hemoglobin, hemoglobin and platelet counts were measured in these blood samples and percent of hemolysis was calculated (%hemolysis = [free hemoglobin] / .free hemogloben + hemoglobin]) Results: In salvaged blood with a cell saver, CPB residual blood and banked blood, hemoglobin concentrations were 20.1 ± 2.7 g/dl, 8.0 ± 1.1 g/dl, and 22.2 ± 2.7 g/dl, respectively. Free hemoglobin concentrations were 336.6 ± 239.5 mg/dl, 49.2 ± 26.8 mg/dl, and 279.5 ± 167.5 mg/dl respectively. Platelet counts were 26.1 ± 22.2 × 10^3/mm^3, 116.8 ± 56.5 × 10^3/mm^3, and 94.9 ± 43.6 × 10^3/mm^3 respectively. % Hemolysis were 1.6 ± 1.1%, 0.6 ± 0.4%, and 1.2 ± 0.7% respectively. In the comparison between the salvaged blood with a cell saver and CPB residual blood, free hemoglobin concentration, % hemolysis, and platelet counts had positive correlations (r = 0.8, 0.7, and 0.6). Conclusions: In twenty cardiac surgeries, CPB residual blood had a lower free hemoglobin level than the other two blood groups. The platelet counts in CPB residual blood were higher than those in cell saver blood but did not differ from those in banked blood. Therefore, CPB residual blood was the least hemolytic blood among the three blood groups when a transfusion was performed in cardiac surgery. (Korean J Acesthesiol 2002; 43: 588~593)
Stearic Acid로 被覆한 Fe₃O₄에 의한 油分除去 (Ⅰ)
韓尙敏,張哲鉉,朴勝祚 동아대학교 환경문제연구소 1989 硏究報告 Vol.12 No.1
The large quantity of iron contained in waste sludge discharged form pickling liquor in a steel industry was used for Fe₃O₄. Then we new adsorbent for oil removal was made. The adsorbent was made of Fe₃O₄ coated with stearic acid. The results of this study that perform batch test to relate adsorptive ability, and oil removal efficiency of the adsorbent with kerosene, bunker-c oil, and emulsified bunker-c oil are followings : 1) The results of batch adsorption test fit well to the Freundlich equation, and the K of kerosene, bunker-c oil, and emulsified bunker-c oil was, 0.20, 0.17, and 0.16, respectively. 2) The adsorptive reaction was the first order reaction and the K' was 0.526/min. 3) The kerosene removal efficiency by new adsorbent was 30% in the alkalinity, 85% in the acidity and 92% in a neutrality.