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전자빔을 이용한 triclosan 제거에 있어서 실험계획법의 이용
장태범(Jang, Tae Bum),이시진(Lee, Si Jin) 한국지반환경공학회 2012 한국지반환경공학회논문집 Vol.13 No.6
본 연구는 E-beam 공정을 통한 triclosan의 광분해에 대하여 조사하였다. 공정의 최적화는 실험계획법에 의한 회분식 실험을 통해 수행되었다. 실험계획법은 통계적 적용 방안의 하나로 각 인자간의 영향을 고려하기 위해 반응표면을 설계하는 방법이다. 반응은 triclosan의 제거율(%, Y1)과 TOC 제거율(%, Y2)로 적용되었고 두 개의 독립변수로서 triclosan의 농도를 “x1”, 조사강도를 “x2”로 설계하였다. 코드화 된 인자에 대한 Triclosan 제거율과 TOC 제거율에 따른 회귀식은 각각 Y1 = 63 -12.4335x1 + 15.1835x2+ 5.8125x1<SUP>2</SUP> - 5.6875x2<SUP>2</SUP> - 0.75x1x2 (R<SUP>2</SUP> = 95.1%, R<SUP>2</SUP>(Adj) = 91.7%)과 Y2 = 46 - 8.8462x1 + 11.7175x2 -0.75x1<SUP>2</SUP> - 6.25x2<SUP>2</SUP> (R<SUP>2</SUP> = 98.7%, R<SUP>2</SUP>(Adj) = 97.7%)로 나타났다. Y1과 Y2에 대한 모델 예측식의 결정계수(R<SUP>2</SUP>)와 수정결정계수(R<SUP>2</SUP>(Adj))의 값이 90% 이상으로 나타나 실험적 관찰결과와 잘 부합하였다. 이러한 결과는 회귀모델이 E-beam 공정에서의 인자영향을 잘 설명하며 통계적 적용이 성공적으로 적용된 것으로 판단된다. This study investigated on the photolytic degradation of Triclosan by E-beam process. The optimization of process was investigated during a series of batch experiments by design of experiments(DOEs). The DOE was one of the statistical application that was used for designed the response surface to determine the effects of each parameters. The responses were applied as removal rate of Triclosan(%, Y1) and TOC removal rate(%, Y2). Two independent variables were concentration of Triclosan and irradiation intensity that were designed as “x1” and irradiation intensity was designed as “x2”. The regression equation in coded parameter between the Triclosan removal efficiencies(%) and TOC removal efficiencies(%) was Y1 = 63 -12.4335x1 + 15.1835x2 + 5.8125x1<SUP>2</SUP> - 5.6875x2<SUP>2</SUP>- 0.75x1x2 (R<SUP>2</SUP> = 95.1%, R<SUP>2</SUP>(Adj) = 91.7%) and Y2 = 46 - 8.8462x1 + 11.7175x2 -0.75x1<SUP>2</SUP> - 6.25x2<SUP>2</SUP> (R<SUP>2</SUP> = 98.7%, R<SUP>2</SUP> (Adj) = 97.7%), respectively. The model predictions agreed well with the experimentally observed results R<SUP>2</SUP> and R<SUP>2</SUP>(Adj) over 90% within both of Y1 and Y2. This result shows that the regression model express well about the effects of parameters on E-beam process and the statistical method was successfully applied.
Performance Analysis for Methods for the Computation of Derivatives
Jang, Taeboom,Cho, Youngsong,Cho, Dongsoo,Kim, Deok-Soo 한국경영과학회 1999 한국경영과학회 학술대회논문집 Vol.- No.1
The computation of derivative of a rational Be´zier curve is requires on its various point for some applications. It can be n issue to quickly compute derivatives of rational Be´zier curve. Therefore, some methods have been developed to compute derivatives of a rational Be´zier curve. This paper analyzed the performance of the methods have performance of the methods for computing derivatives of a rational Be´zier curve. Cons and pros of each method are also discussed. In this way, this paper discusses which method is preferable for the computation of derivatives of a rational Be´zier curve in various situations.