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Showing 1 to 20 of 73 for “"Central Composite"”.
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Mixed-Factors Central-Composite Designs: A Theoretical and Empirical Comparison
Made available in DSpace on 2014-12-13T18:21:39Z (GMT). No. of bitstreams: 1 7624069.pdf: 6440030 bytes, checksum: 04b573b0e568bb85e333e9dbd649d613 (MD5) Previous issue date: 1976
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Recommendations for Design Parameters for Central Composite Designs with Restricted Randomization
In response surface methodology, the central composite design is the most popular choice for fitting a second order model. The choice of the distance for the axial runs, alpha, in a central composite design is very crucial to the performance of the design. In the literature, there are plenty of …
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A central composite design to investigate antibody fragment production by Pichia pastoris
… rate, protein expression), by a 3-factor-3-level central composite factorial design. This experimental design involved running shake flask culture at 15 different experimental conditions with duplicates. Optical density (OD600), dry cell weight (DCW), and BCA Protein Assays were done on each …
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Graphical Tools, Incorporating Cost and Optimizing Central Composite Designs for Split-Plot Response Surface Methodology Experiments
… examining and comparing different variations of central composite designs (CCDs) with standard, V- and G-optimal factorial levels. The graphical tools are shown to be informative for evaluating and developing strategies for improving the prediction performance of SPDs. The overall cost of a SPD …
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Optimality criteria applied to certain response surface designs
… was used to construct D<sub>S</sub>-optimal central composite designs. This involved viewing the design points as having continuous weights. D<sub>S</sub>-best central composite designs were constructed either analytically or numerically for a fixed axial point distance. The results of …
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Improving Response Characteristics of Split Ring Resonators Using Experimental Designs
… curvature effects. A full factorial design and a central composite design is utilized for the study. The results in improving split ring resonator design are discussed.</p> <p>This study shows that the design of experiments approaches can effectively be utilized to examine the effects on the …
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Outliers and robust response surface designs
… parameters are obtained by computer for the central composite, Box-Behnken, hybrid, small composite and equiradial designs. Similar results are seen for both robustness to outliers and to missing data. The central composite turns out to be the optimal design type and of the two economical …
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Decision-Based Design of New Products: Electrothermal Swing Adsorption (Esa) System
… A response surface methodology using Central Composite Design is then used to optimize the operation of the ESA system. The results of the experiments also provide inputs to the multiattribute evaluation and design optimization. Finally, an assessment of ESA technology in terms of its …
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Quantitative Model for the Prediction of Hydrodynamic Size of Nonionic Reverse Micelles
… using dynamic light scattering (DLS). A central composite experimental design was used to quantitatively model reverse micelle size as a function of ω, [NP], and r. The model has demonstrated the capability of predicting the mean diameter of micelles from 4 to 13 nm with a precision of ± …
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Experimental Investigation of the Effect of Composition on the Performance and Characteristics of PEM Fuel Cell Catalyst Layers
… the role of catalyst layer composition using a Central Composite Design (CCD) experiment with two factors which are Nafion content and carbon loading while the platinum catalyst surface area is held constant. For each catalyst layer composition, polarization curves are measured to evaluate cell …
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The use of correlated simulation experiments in response surface optimization
… order case, four design classes are considered; central composite designs, Box-Behnken designs, three-level factorial designs, and small composite designs. The findings of this research indicate that the assignment rule blocking strategy generally performs the best of the three strategies under …
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Anaerobic co-digestion of municipal solid waste and sewage sludge.
… thermal, alkaline and thermochemical. Using a central composite experimental design, two factors were studied, the total solids content of the feed and its particle size. For all three pretreatments, second order empirical models were developed with respect to common indicators of metabolic …
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An experimentally designed melt rheological characterization of starblock polymers
… of response surface methodology. A rotatable central composite design (ccd) was employed with linear 2⁵ factorial structure and with axial points to fit the pure quadratic terms. Regression analysis of rheological data from styrene-isoprene and t-butyl styrene-isoprene starblock polymers was …
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Response Surface Method for Time-Variant Reliability Analysis
… modeled by second order polynomials fitted using central composite designs applied to data from response time histories. The structural failure probability conditional upon the uncertain system parameter values is assumed to follow an extreme value distribution, the parameters of which are fitted …
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Investigation of operating parameters in a vertical stirred mill
… experiments was designed using a face centred central composite design (FCCD) and the results was statistically analysed using a design of experiments (DOE) software.
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Measurement Error in Designed Experiments for Second Order Models
… to suggest optimal values for axial points in Central Composite Designs. The proper analysis for experimental data including ME is outlined for first and second order models. A comparison of this analysis to a typical Ordinary Least Squares analysis is made for second order models. The …
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Short-term traffic forecasting for a smart satellite communications system
… to identify impactful hyper-parameters and a central composite design to find optimal model settings. During a holdout period, the mean absolute percentage error using a 15-minute lag was 10.7% with a standard deviation of 2.6% over a month of forecasting. Networks using a GRU layer and tuned …
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DC magnetron reactive sputtering of low stress AlN piezoelectric thin films for MEMS application
… as a gravimetric chemical sensor. A rotatable central composite designed experiment was performed to optimize film properties affecting device performance: film crystallinity, stress, and uniformity. Film property response characterization was conducted with x-ray diffractometry, spectroscopic …
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Method of reliability-based calibration of seismic structural design parameters
… states. The Response Surface Method (RSM) with a central composite design is used to expedite the calibration process. Since information is required on the actual probabilities of exceeding various limit state conditions for various structural configurations which typically requires a large number …
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