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Showing 1 to 20 of 20 for “"response surface method"”.
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Response Surface Method for Time-Variant Reliability Analysis
An efficient, approximate method for computing the structural reliability of uncertain systems subjected to time-varying loads is presented in this study. The method uses response surface methodology and the fast integration scheme developed by Wen and Chen (1987). The mean and coefficient of …
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EVALUATION OF CELLULOLYTIC ENZYMES FROM A NEWLY ISOLATED BREVIBACILLUS SP. JXL; AND OPTIMIZATION OF COSLIF PRETREATMENT VARIABLES OF SWEET SORGHUM BAGASSE USING A RESPONSE SURFACE METHOD
… bagasse (SSB) feedstock was studied using Response Surface Methodology (RSM). Batch experimental matrix was set up based on response surface method's central composite design in two factors to determine the effects of reaction time and temperature on the yield of simple sugars after a …
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A screening model to explore planning decisions in automotive manufacturing systems under demand uncertainty
… the adaptive one-factor-at-a-time (OFAT) method with a Response Surface method and simulation-based linear optimization. The identified solution is then examined with Value at Risk and Gain chart and a statistics table.
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Method of reliability-based calibration of seismic structural design parameters
… ability of analytical models to describe the response of a structure. To account for these uncertainties, the design parameters in current seismic codes need to be calibrated based on required safety and satisfactory performance under future earthquakes in terms of reliability. The calibration …
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Development and optimization of a wide base FEA truck tire model for prediction of tire-road interactions
… based tire model. Through the use of an Adaptive Response Surface Method (ARSM) optimization algorithm, the newly constructed wide base FEA truck tire model underwent a parameter-tuning procedure of its materials until the behaviour of the virtual model closely matched the behaviour of the …
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A Structural Optimization Scripted Software System
… consists of the gradient-based optimization method and input file regeneration program. The small-scale structural optimization system, requires users only to put in the parameters of the initial design, the system will run the optimization process and generate new models automatically until …
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The optimization of simulation models by genetic algorithms:a comparative study
… a comparative study of simulation optimization methods. We compare a new technique, genetic search, to two old techniques: the pattern search and the response surface methodology search. The pattern search uses the Hooke and Jeeves algorithm and the response surface method search uses the code …
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Response Surface Modelling of Monte-Carlo Fire Data
… of the computer fire models. An alternative method is to use Monte-Carlo simulation. But it usually requires a large amount of calculation to reach sufficient accuracy, particularly if the probability of the unsafe region is small, as it should be if the design is to be reasonably reliable. …
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A study on laser engraving process parameters and performance characteristics for wood base materials
… the output results which were identified as surface roughness, depth of engraving and Head Affected Zone (HAZ). A second order equation by Response Surface Method (RSM) was used to get the prediction result that was compared with the experimental result. The experimental result showed that …
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Stochastic analysis of structures made of composite materials
A probabilistic methodology for the reliability analysis of composite rotor blades at the ply level was developed. The proposed methodology involves (i) the quantification of the uncertainties (physical, statistical and model) related to the material properties and the extreme aero-elastic loads …
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Sequestration of carbon dioxide (CO2) using bio-foamed concrete brick incorporating bacillus tequilensis bacteria
… CO2 and convert it to CaCO3. 2k factorial and Response Surface Method (RSM) analysis were used to optimise carbonation depth and compressive strength of B-FCB using four factors, density (D), B.tequilensis (B), temperature (T) and CO2. By given priority to carbonation depth the optimal …
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Utilization of coal bottom ash and fine coconut shell as partial sand replacement in concrete
… absorption. Design Expert software was used for Response Surface Method (RSM) analysis to determine the optimum percentages of CBA and FCS as partial sand replacement in concrete. CBA and FCS were inserted as factors (input) whereas the results of fresh and hardened concrete from the experimental …
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Performance evaluation of alsi10mg mould insert material fabricated by selective laser melting process
… strategies as an alternative to conventional methods in order to produce of plastic injection mould (PIM) tools was investigated. Response surface method (RSM) and variance analysis (ANOVA) are utilized to optimize the SLM parameters and develop the mathematical models. The optimum values …
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Modelizado y optimización de problemas biomecánicos mediante la combinación del método de los elementos finitos (mef) y técnicas avanzadas de optimización
… difficult to model and optimise by widely used methods such as the Finite Element Method (FEM). First, there is a very high computational cost when only FEM is applied to model and optimise biomechanical problems. In addition, solving this type of biomechanical problems experimentally (through …
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Selected optimization procedures for CFD-based shape design involving shock waves or computational noise
… cause the objective function to be non-smooth. Methods for robust optimization of the nonsmooth functions are presented. The dissertation is divided into two parts, The first part investigates a simple model problem involving quasi-one-dimensional flow in a duct. The flow field computation is …
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BIODIESEL PRODUCTION THROUGH MICROWAVE ASSISTED TRANSESTERIFICATION OF MICROBIAL CELLS
… was conducted. Through Box-Behnken design and response surface methodology, the optimal temperature, pH, and glycerol concentration for yeast growth on pretreated crude glycerol was identified as 30.2 deg C, 6.0, and 19.8 g/L, respectively. Adopting these optimal parameters, the biomass density …
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Development and optimisation of food products low in FODMAPs: an investigation of dietary fibres in low FODMAP products and the reduction of FODMAPs via bio-technological processes
… a fibre-enriched low FODMAP biscuit. Using the response surface method (RSM) for finding the best combination of the three ingredients resulted in a biscuit with a DF content of ~15 % and an improved quality compared to the unfortified biscuit. The sensory quality of the optimised biscuit was …
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Modelizado y optimización de problemas mecánicos no lineales mediante el Método de Elementos Finitos, RSM y ML
… stress-strain curves. The subsequent adjustment method consists of an iterative procedure that tries to reduce the existing error between the curves obtained in the tests and those generated by means of certain input parameters. The difficulty that this implies, added to the cost of the necessary …
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DFIG-Based Split-Shaft Wind Energy Conversion Systems
… Then, an optimization approach using the Response Surface Method (RSM) is conducted to minimize the annualized cost of the Hybrid Energy Storage System (HESS); consisting of a flywheel, supercapacitor, and battery. The goal is to smooth out the output power fluctuations by the optimal size …
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In-Vivo and In-Vitro Cholesterol Removal by Lactobacilli and Bifidobacteria
… removal of cholesterol via binging to cellular surface. Fatty acid methyl esters, as quantified using gas chromatography, showed changes of hexadecanoic-, octadecanoic-, total saturated-, and unsaturated acids in cells grown in the presence of cholesterol compared with those grown without …