Journal ArticleDOI
A note on model selection based on the percentage of accuracy-precision
TLDR
By combining meaningful metrics of accuracy and precision, a new metric for determining the best-in-class method was defined.Abstract:
Mathematical methods such as empirical correlations, analytical models, numerical simulations, and data-intensive computing (data-driven models) are the key to the modeling of energy science and engineering. Accrediting of different models and deciding on the best method, however, is a serious challenge even for experts, as the application of models is not limited only to estimations, but to predictions and derivative properties. In this note, by combining meaningful metrics of accuracy and precision, a new metric for determining the best-in-class method was defined.read more
Citations
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Study of the transesterification of waste cooking oil for the production of biodiesel in a microreactor pilot: The effect of acetone as the co-solvent
TL;DR: In this paper, the performance of a semi-industrial microreactor in the production of biodiesel from waste cooking oil (WCO) with methanol was investigated, and the best performance in biodiesel production was observed at a residence time of 12.5min, reaction temperature of 60°C, methanoline to oil volume ratio of 2.15:5, and acetone concentration (pure oil-based) of 13.95% with a purity of 97.16%.
Journal ArticleDOI
Biodiesel production from waste cooking oil using wheat bran ash as a sustainable biomass
TL;DR: In this paper, the authors investigated the transesterification of waste cooking oil using methanol and modified wheat bran ash and CaO as the catalyst, and obtained a biodiesel purity of 93.6% under an optimal condition, i.e. methanols to oil volume ratio of 1.46:1, a catalyst content of 11.66% and a temperature of 54.6°C during 114.21min.
Journal ArticleDOI
Experimental study of carbon dioxide absorption by mixed aqueous solutions of methyl diethanolamine (MDEA) and piperazine (PZ) in a microreactor
TL;DR: In this paper, a T-shaped microreactor mixer was used as the mass transfer device to improve the absorption rate of carbon dioxide (CO2) using a MDEA+PZ solvent.
Journal ArticleDOI
Carbon dioxide desorption from aqueous solutions of monoethanolamine and diethanolamine in a microchannel reactor
TL;DR: In this article, the process of carbon dioxide (CO2) desorption from two saturated solutions of monoethanolamine (MEA) and diethanolamine (DEA) was performed in a microchannel made of stainless-steel grade 316 with a circular cross-section.
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The effect of alcohol–gasoline fuel blends on the engines’ performances and emissions
TL;DR: In this article, the authors investigated artificial neural network (ANN) modeling to predict the exhaust emissions and engine performance, and the accuracy of the proposed model was evaluated by calculating the mean square error (MSE), regression coefficient (R2), and average absolute relative deviation (AARD%).
References
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Journal ArticleDOI
River flow forecasting through conceptual models part I — A discussion of principles☆
J.E. Nash,J.V. Sutcliffe +1 more
TL;DR: In this article, the principles governing the application of the conceptual model technique to river flow forecasting are discussed and the necessity for a systematic approach to the development and testing of the model is explained and some preliminary ideas suggested.
Journal ArticleDOI
Combinatorial optimization: algorithms and complexity
TL;DR: This clearly written, mathematically rigorous text includes a novel algorithmic exposition of the simplex method and also discusses the Soviet ellipsoid algorithm for linear programming; efficient algorithms for network flow, matching, spanning trees, and matroids; the theory of NP-complete problems; approximation algorithms, local search heuristics for NPcomplete problems, more.
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Evaluating the use of “goodness-of-fit” Measures in hydrologic and hydroclimatic model validation
TL;DR: In this paper, the goodness-of-fit or relative error measures (including the coefficient of efficiency and the index of agreement) that overcome many of the limitations of correlation-based measures are discussed.
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The IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use
Wolfgang Wagner,Andreas Pruß +1 more
TL;DR: The International Association for the Properties of Water and Steam (IAPWS) adopted a new formulation called "The IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use" as discussed by the authors.