http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
광분해반응을 통한 MTBE 분해 시 음이온 영향의 통계적 분석
천석영(Chun, Sukyoung),장순웅(Chang, Soonwoong) 한국지반환경공학회 2011 한국지반환경공학회논문집 Vol.12 No.10
이 연구는 Methyl tert Btyl Ether(MTBE)의 광촉매반응을 통한 제거시에 다양한 음이온(Cl?, NO₃?, HCO₃?)들의 영향을 통계적 방법을 사용하여 조사하였다. 이 공정은 일반적으로 UV의 존재 하에 수용액상에 생성되는 Hydroxyl radicals(OH라디칼)의 생성에 기초하며, 이러한 라디칼들의 생성은 수용액 상의 무기 음이온들이 OH라디칼과의 반응에 의해 광분해를 방해한다. 이런 무기 음이온들의 영향은 반응표면법(RSM)의 한 종류인 혼합물분석(Mixture analysis)를 통해 Cl?, NO₃?와 HCO₃?의 독립변수들을 수학적으로 표현하였다. 분산분석(Analysis of variance; ANOVA)의 회귀분석항은 유의한 p값(p<0.0001)과 높은 결정계수(R²=99.28%, R²adj=98.91%)를 나타냈다. 그리고 등고선도(Contour plot)와 반응표면도(Response surface plot)는 UV/H₂O₂ 공정에 기초한 MTBE광분해에 대한 무기 이온들의 영향을 나타내었다. 이 연구의 결과는 MTBE의 광분해에 대해 Cl?와 HCO₃? 이온이 OH라디칼의 생성을 방해하는 것으로 나타났고 이 두 인자에 의한 상호작용이 관찰되었다. This study investigated the effects of various inorganic anions(Cl?, NO₃?, HCO₃?) on the Methyl tert Butyl Ether(MTBE) degradation by photocatalysis using statistical method. Generally, this process in general demands the generation of hydroxyl radicals(OH radical) in solution in the presence of UV light. The generation of radicals were affected by inorganic anions in solution that inhibited the photodegradation by their trapping hydroxyl radicals. The effects of inorganic anions were mathematically described as the independent variables such as Cl?, NO₃?, and HCO₃?, and these were designed by mixture analysis that was one of the response surface methodology(RSM). Regression analysis on ANOVA showed significant p-value(p<0.0001) and high coefficients for determination value(R²=99.28%, R²adj=98.91%). Contour and response surface plots showed that the effects of inorganic anions for MTBE photodegradation based on UV/H₂O₂ process. In the result, Cl? and HCO₃? inhibited the photodegradation of the MTBE by their trapping hydroxyl radicals, and the interaction by these two factors was observed.
측벽 엔드밀 가공 시 반응표면법을 이용한 최적 가공조건
홍도관(Hong, Do-Kwan),최재기(Choi, Jae-Gi),박진우(Park, Jin-Woo),백황순(Baek, Hwang-Soon),안찬우(Ahn, Chan-Woo) 한국소음진동공학회 2008 한국소음진동공학회 논문집 Vol.18 No.11
Working condition is one of the most important factors in precision working. In this study, we optimized the vibration acceleration of working progress direction using RSM(response surface methodology) by table of orthogonal array. RSM was well adapted to make analytic model for minimizing vibration acceleration, created the objective function and saved a great deal of computational time. Therefore, it is expected that the proposed optimization procedure using RSM can be easily utilized to solve the optimization problem of working condition. The experimental results of the surface roughness and vibration acceleration showed the validity of the proposed working condition of side wall end-milling as it can be observed.
Development of the New Hybrid Evolutionary Algorithm for Low Vibration of Ship Structures
공영모(Kong, Young-Mo),최수현(Choi, Su-Hyun),송진대(Song, Jin-Dae),양보석(Yang, Bo-Suk) 한국소음진동공학회 2006 한국소음진동공학회 논문집 Vol.16 No.6
This paper proposes a RSM-based hybrid evolutionary Algorithm (RHEA) which combines the merits of the popular programs such as genetic algorithm (GA), tabu search method and response surface methodology (RSM). This algorithm, for improving the convergent speed that is thought to be the demerit of genetic algorithm, uses response surface methodology and simplex method. The mutation of GA offers random variety to finding the optimum solution. In this study, however, systematic variety can be secured through the use of tabu list. Efficiency of this method has been proven by applying traditional left functions and comparing the results to GA. It was also proved that the newly suggested algorithm is very effective to find the global optimum solution to minimize the weight for avoiding the resonance of fresh water tank that is placed in the after body area of ship. According to the study, GA's convergent speed in initial stages is improved by using RSM method. An optimized solution is calculated without the evaluation of additional actual objective function. In a summary, it is concluded that RHEA is a very powerful global optimization algorithm from the view point of convergent speed and global search ability.
진도훈(Do-Hun Chin),김종도(Jong-Do Kim),윤문철(Moon-Chul Yoon) 한국기계가공학회 2013 한국기계가공학회지 Vol.12 No.2
In this paper, an average surface roughness, Ra, was measured by optical measurement and its mathematical model according to spindle speed and feedrate was obtained by least square method. Also, its result is compared and investigated with real measured average surface roughness. The optical measurement of surface roughness is performed by CLSM(confocal laser scanning microscope) and the captured HEI(height encoded image) data is used as an original data for the generation of average surface roughness and its mathematical plane or contour surface of surface roughness. Using this polynomial model with two independent variables, the behavior of an average surface roughness is investigated and analyzed with an experimental modeling of least square algorithm. And it can be used for the prediction of Ra in different condition of machining.
반응표면법에 의한 연약지반 차량 거동의 통계적 분석 및 예측
이태희(TAE-HEE LEE),정재준(JAE-JUN JUNG),홍섭(SUP HONG),김형우(HYUNG-WOO KIM),최종수(JONG-SU CHOI) 한국해양공학회 2006 韓國海洋工學會誌 Vol.20 No.3
For optimal design of a deep-sea ocean mining collector system,based on self-propelled mining vehicle, it is imperative to develop and validate the dynamic model of a tracked vehicle traveling on soft deep seabed. The purpose of this paper is to evaluate the fidelity of the dynamic simulation model by means of response surface methodology. Various statistical techniques related to response surface methodology, such as outlier analysis, detection of interaction effect, analysis of variance, inference of the significance of design variables, and global sensitivity analysis, are examined. To obtain a plausible response surface model, maximum entropy sampling is adopted. From statistical analysis and prediction for dynamic responses of the tracked vehicle, conclusions will be drawn about the accuracy of the dynamic model and the performance of the response surface model.
최재기(Jae Gi Choi),박진우(Jin Woo Park),홍도관(Do Kwan Hong),안찬우(Chan Woo Ahn) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.6
Manufacturing condition is one of the important factor in precision manufacturing. In this study, we optimized minimizing the X, Y, Z vibration acceleration using Response Surface Methodology by Central Composite Design. The Response Surface Methodology was well adapted to make the analytical model of the minimum vibration acceleration and enable the objective function to be easily created and a great deal of the time in computation to be saved. Therefore, it is expected that the proposed optimization procedure using the Response Surface Methodology can be easily utilized to solve the optimization problem of manufacture condition.
엔드밀 가공에 반응표면법을 이용한 최적조건에 관한 연구
최재기(Jae Gi Choi),박진우(Jin Woo Park),홍도관(Do Kwan Hong),안찬우(Chan Woo Ahn) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
Manufacturing condition is one of the important factor in precision manufacturing. In this study, we optimized minimizing the Z vibration acceleration using Response Surface Methodology by Central Composite Design. The Response Surface Methodology was well adapted to make the analytical model of the minimum vibration acceleration and enable the objective function to be easily created and a great deal of the time in computation to be saved. Therefore, it is expected that the proposed optimization procedure using the Response Surface Methodology can be easily utilized to solve the optimization problem of manufacture condition.
유한요소법 및 반응표면법 기반 대면적 양면형 태양광 모듈 프레임 최적설계
한동운(Han Dongwoon),김성탁(Kim Seongtak) 한국태양에너지학회 2023 한국태양에너지학회 논문집 Vol.43 No.6
Large-scale bifacial photovoltaic modules have the advantages of high unit yield and production. Because the module weight increases with the module size, the power conversion efficiency can decrease owing to defects such as encapsulant delamination and cell cracking caused by the increased deflection of the module. However, research on the design optimization of large-scale bifacial photovoltaic module frames is lacking. Therefore, in this study, we analyzed the deflection of large-scale bifacial photovoltaic modules using finite element analysis (FEA). Furthermore, we propose an optimal design for a solar module frame that minimizes both module deflection and frame weight using the response surface methodology (RSM). We established 32 experimental setups utilizing the design of experiments with five frame shape factors placed at two levels each. The results of structural analysis showed that the maximum deflection occurred at the center of the module. The results obtained using RSM for minimizing deflection and weight yielded optimal factors as follows: a, b, c, d, e were found to be 1.9 ㎜, 14.0 ㎜, 1.5 ㎜, 1.7 ㎜, and 2.5 ㎜, respectively. A comparison of the deflection and weight between the existing and optimal conditions obtained from structural analysis revealed an increase in weight of approximately 4.5% compared to the existing conditions. Simultaneously, a deflection reduction of approximately 15.8% was observed.
김석현(S. H. Kim),김명호(M. H. Kim),차용훈(Y. H. Cha) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
In this study, response values were analyzed according to aging conditions using Design of Experiment and Response Surface Methodology in order to produce maraging steel with excellent mechanical properties. Aging treatment conditions were selected with temperature and time. Through response optimization, then, time and temperature of the most optimal response values were extracted.