• Title/Summary/Keyword: response surface methodology

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Production of Levulinic Acid from Marine Algae Codium fragile Using Acid-Hydrolysis and Response Surface Methodology (산가수분해법과 반응표면분석법을 이용한 해조류 청각으로부터 레불린산의 생산)

  • Jeong, Gwi-Taek;Park, Don-Hee
    • KSBB Journal
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    • v.26 no.4
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    • pp.341-346
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    • 2011
  • This work is focused on the possibility of marine biomass Codium fragile as renewable resources for production of levulinic acid. In an effort to optimize the reaction conditions of levulinic acid production from Codium fragile, response surface methodology was applied. A total of 18 individual experiments were designed to investigate the effect of reaction temperature, catalyst amount, and reaction time. As a result, 4.26 g/L levulinic acid from Codium fragile was produced in the condition of $160.7^{\circ}C$ of reaction temperature, 3.9% of sulfuric acid, and 39.1 min of reaction time. This result will provide the useful information for chemical production from marine resource.

Optimization for Hot water Extraction Condition of Liriope spicata Tuber Using Response Surface Methodology (반응표면분석법에 의한 맥문동 열수추출 조건의 최적화)

  • 김순동;구연수;이인자;박인경;윤광섭
    • Food Science and Preservation
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    • v.8 no.2
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    • pp.157-163
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    • 2001
  • Optimal conditions for hot water extraction of Liriope spicata tuber were investigated with changes in solvent ratio(2∼6 fold) and heating time(1∼5 hr) by response surface methodology. The content of extractable solids increased with an increased in solvent ratio, and the highest content showed at heating time of 3 hr. The content of total steroid saponin increased with a decrease in solvent ratio, and increased with an increase in heating time at increasing the solvent ratio. The content of non-reducing sugar containing oligosaccharides at a lower solvent ratio didn’t show changes depending on heating time, while that at a higher ration decreased with an increase in heating time. Optimal extraction conditions using hot water as the limited conditions of 15∼18% extractable solids, 1.5∼2.0% total steroid saponin, 6∼8% reducing sugar, 6∼7% non-reducing sugar and 13∼15 brix were 3 hrs of heating time and 4 fold of solvent ratio.

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Optimization of Homemade Pasta with Addition of Basil using Response Surface Methodology (반응표면 분석법을 이용한 바질 첨가한 홈메이드 파스타 제조의 최적화)

  • Choi, Eun-Young;Joo, Na-Mi
    • Journal of the Korean Society of Food Culture
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    • v.20 no.1
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    • pp.61-67
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    • 2005
  • The purpose of study was to determine the organoleptic characteristics of homemade basil-pasta made in various compounding ratio according to central composite design. The optimum mixing condition for basil-pasta was optimized by response surface methodology. The texture, including color, flavor, elasticity and overall quality, was measured as sensory evaluation. The optimum mixing rates of durum wheat semolina, basil and egg were 73.97g, 5.95g and 36.17g for color, 53.14g, 4.52g and 35.85g for flavor, 48.75g, 2.95g and 36.85g for elasticity. The organoleptic overall quality of basil-pasta showed the maximum score in the mixing condition of 55.52 g durum wheat semolina, 4.55g basil paste and 35.51g egg.

Optimization of Jelly with Addition of Morinda Citrifolia(Noni) by Response Surface Methodology (반응표면분석법을 이용한 노니젤리 제조의 최적화)

  • Park Sang-Hyun;Joo Na-Mi
    • Korean journal of food and cookery science
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    • v.22 no.1 s.91
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    • pp.1-11
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    • 2006
  • To determine the optimal mixing conditions of Noni jelly, samples were prepared with various compounding ratios of Noni juice(120, 160, 200, 240 and 280 g), gelatin(12, 16, 20, 24 and 28 g) and sucrose(80, 100, 120, 140 and 160 g) using a central composite design. Physical and sensory evaluations were performed and the results analyzed using response surface methodology. The optimum mixing rate satisfying sensory items was Noni juice 192 g, gelatin 18.25 g and sucrose 135 g.

Optimum Manufacturing Condition of Side Wall End Milling Using Response Surface Methodology (측벽 엔드밀 가공 시 반응표면법을 이용한 최적가공조건)

  • Choi, Jae-Gi;Park, Jin-Woo;Hong, Do-Kwan;Woo, Byung-Chul;Ahn, Chan-Woo
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2007.11a
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    • pp.1313-1317
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    • 2007
  • Manufacturing condition is one of the most important factors in precision manufacturing. In this study, we optimized minimizing the Z vibration acceleration using RSM(response surface methodology) by table of orthogonal array. RSM 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 RSM can be easily utilized to solve the optimization problem of manufacture condition.

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Design of a Fuzzy Logic Controller Using Response Surface Methodology (반응표면분석법을 이용한 퍼지제어기의 설계)

  • 김동철;이세헌
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.05a
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    • pp.225-228
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    • 2002
  • When the fuzzy logic controller (FLC), which is designed based on the plant model, is applied to the real control system, satisfactory control performance may not be attained due to modeling errors from the plant model. In such cases, the control parameters of the controller must be adjusted to enhance control performance. Until now, the trial and error method has been used, consuming much time and effort. To resolve such problem, response surface methodology (RSM), a new method of adjusting the control parameters of the controller, is suggested. This method is more systematic than the previous trial and error method, and thus optimal solutions can be provided with less tuning. First, the initial values of the control parameters were determined through the plant model and the optimization algorithm. Then, designed experiments were performed in the region around the initial values, determining the optimal values of the control parameters which satisfy both the rise time and overshoot simultaneously.

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Design of the Bead Force and Die Shape in Sheet Metal Forming Processes Using a Rigid-plastic Finite Element Method and Response Surface Methodology (강소성 유한요소법과 반응표면분석법을 이용한 박판성헝 공정에서의 비드력 및 다이형상의 설계)

  • Kim, S.H.;Huh, H.
    • Transactions of Materials Processing
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    • v.9 no.3
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    • pp.284-292
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    • 2000
  • Optimization of the process parameters is carried out for process design in sheet metal forming processes. The scheme incorporates with a rigid-plastic finite element method for the deformation analysis and response surface methodology for the optimum searching of process parameters. The algorithm developed is applied to design of the draw bead force and the die radius in deep drawing processes of rectangular cups. The present algorithm shows the capability of designing process parameters which enable the prevention of the weak part of fracture during processes.

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Determination of Fleet Size of Equipment in Buffer Yard of an Automated Container Terminal by using a Response Surface Methodology (표면반응법을 이용한 자동화 컨테이너 터미널의 버퍼 장치장에서의 장비 규모 결정)

  • 배종욱;양창호;김갑환
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2000.11a
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    • pp.121-129
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    • 2000
  • In this paper, we discuss how to operate a buffer yard in an automated container terminal, which will be used for resolving the difficulties to which the interaction between external manned trucks and internal unmanned equipment led. The determination of fleet size of material handling equipment is an important issue in designing of buffer yard in automated container terminals. This research also addresses the issue of determining buffer capacities through simulation. By using response surface methodology (RSM) for efficient experimentation, the optimal combination of design parameters under applicable operational strategies is obtained.

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Application of Response Surface Methodology for optimize the Biostimulant ball and stabilize Heavy metals pollutants in contaminated coastal sediments

  • Song, Young-chae;Subha, Bakthacachallam;Woo, Jung Hui
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2015.07a
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    • pp.179-180
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    • 2015
  • The variety of organic and inorganic pollutants are introduced to coastal sediment and making highly contaminated due to rapid development of industralization and economic development. Numerous contaminants are release into marine sediment and it significantly affect marine aquatic environment. In the present study stated the optimize the biostimulant ball (BSB) in coastal sedimentand stabilse the heavy metals present in the sediment. The effective variables like BSB size, distance and month variables on Cu stabilization was determined by using Response surface methodology(RSM). The analysis of variance (ANOVA) and coefficient determination (R2) of Cu reduction 0.9610 and maximum stabilisation was obtained in 3cm ball size and 5.5cm distance and 4 month interval time. This result revealed that the BSB in effective for Cu reduction in coastal sediment.

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A study of cut-off tool life equation by response surface methodology (應答表面法에 의한 切斷바이트의 工具壽命式에 關한 硏究)

  • 김원익;이충경;송지복;최만성
    • Journal of the korean Society of Automotive Engineers
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    • v.10 no.2
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    • pp.54-60
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    • 1988
  • This paper presents a study of tool-life equation on cut-off test by the statistical approach, referred to as response surface methodology instead of a conventional one-variable at a time method. It is the merit of response surface methodology that the test time is reduced to minimize the size and accurate analysis can be done. The reliability of such an equation can also be estimated. Two independent variables, cutting speed and feed rate, were investigated. A first order modeling equation is presented in this project. The results of this study are as follows that tool-life in cut-off operation is affected by cutting speed more than feed, and first order tool-life predicting equations are in good agreement with experimental results.

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