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16th International Conference on Environment and Electrical engineering, EEEIC 2016

作者： Gomes, Flavio A. Gomes, Viviane M. Assis, Alfredo De O. Reis, Marcio R. Da C. Da Cruz, Gelson Calixto, Wesley P. Electrical Mechanical and Computer Engineering School University of Goias Brazil Experimental and Technological Research and Study Group Federal Institute of Goias Brazil Program in Electronic Systems and Automation University of Brasilia Brazil

ISBN: (纸本)9781509023196

The purpose of this paper is to use the hybridized optimization method in order to find mathematical structures for analysis of experimental data. The heuristic optimization method will be hybridized with deterministic optimization method in order to that structures found require not knowledge about data generated experimentally. Three case studies are proposed and discussed to validate the results. The proposed method has viable solution for the analysis of experimental data and extrapolation, with mathematical expression reduced. © 2016 IEEE.

关键词： Heuristic methods

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An efficient method to estimate sorption isotherm curve coefficients

arXiv

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arXiv 2017年

作者： Berger, Julien. Busser, Thomas Dutykh, Denys Key, Nathan Mendes LOCIE 5271 CNRS Université Savoie Mont Blanc Le Bourget-du-Lac CedexF-73376 Grenoble Alpes Univ. Savoie Mont Blanc CNRS LAMA Chambéry73000 Thermal Systems Laboratory Mechanical Engineering Graduate Program Pontifical Catholic University of Paraná Rua Imaculada Conceicaõ Curitiba-Paraná1155

This paper deals with an inverse problem applied to the field of building physics to experimentally estimate three sorption isotherm coefficients of a wood fiber material. First, the mathematical model, based on convective transport of moisture, the Optimal Experiment Design (OED) and the experimental set-up are presented. Then measurements of relative humidity within the material are carried out, after searching the OED, which is based on the computation of the sensitivity functions and a priori values of the unknown parameters employed in the mathematical model. The OED enables to plan the experimental conditions in terms of sensor positioning and boundary conditions out of 20 possible designs, ensuring the best accuracy for the identification method and, thus, for the estimated parameter. Two experimental procedures were identified: I) single step of relative humidity from 10% to 75% and ii) multiple steps of relative humidity 10-75-33-75% with an 8-day duration period for each step. For both experiment designs, it has been shown that the sensor has to be placed near the impermeable boundary. After the measurements, the parameter estimation problem is solved using an interior point algorithm to minimize the cost function. Several tests are performed for the definition of the cost function, by using the L2or L∞norm and considering the experiments separately or at the same time. It has been found out that the residual between the experimental data and the numerical model is minimized when considering the discrete Euclidean norm and both experiments separately. It means that two parameters are estimated using one experiment while the third parameter is determined with the other experiment. Two cost functions are defined and minimized for this approach. Moreover, the algorithm requires less than 100 computations of the direct model to obtain the solution. In addition, the OED sensitivity functions enable to capture an approximation of the probability distribution fun

关键词： Sorption

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Soil resistivity study and simulation with finite elements method 16

Soil resistivity study and simulation with finite elements m...

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16th International Conference on Environment and Electrical engineering, EEEIC 2016

作者： Pereira, Thiago Martins De Lima, Rodrigo Alves Gomes, Viviane Margarida Gutembergue, Sostenes Alves, Aylton Jose Calixto, Wesley Pacheco Electrical Mechanical and Computer Engineering School EMC Federal University of Goias UFG Brazil Experimental and Technological Research and Study Group NExT Federal Institute of Goias IFG Brazil Program in Electronic Systems and Automation PGEA University of Brasilia UnB Brazil

ISBN: (纸本)9781509023196

This work purpose is to study the influence of concrete buried structures in grounding systems. Comparison of soil characteristics between dry and rainy seasons and soil electrical behavior was carried out. Simulations in finite element method was performed for tree layer stratified soil and the electrostatic equipotential surfaces were mapped into the region of interest. © 2016 IEEE.

关键词： Finite element method

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Author Correction: Quantitative Characterization of Structural and mechanical Properties of Boron Nitride Nanotubes in High Temperature Environments

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Scientific reports 2018年第1期8卷 4769页

作者： Xiaoming Chen Christopher M Dmuchowski Cheol Park Catharine C Fay Changhong Ke Micro- and Nanotechnology Research Center State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 China. Department of Mechanical Engineering State University of New York at Binghamton Binghamton New York 13902 USA. Materials Science and Engineering Program State University of New York at Binghamton Binghamton New York 13902 USA. Advanced Materials and Processing Branch NASA Langley Research Center Hampton Virginia 23681 USA. Department of Mechanical Engineering State University of New York at Binghamton Binghamton New York 13902 USA. cke@binghamton.edu. Materials Science and Engineering Program State University of New York at Binghamton Binghamton New York 13902 USA. cke@binghamton.edu.

A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.

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Nonlinear model predictive control hardware implementation with custom-precision floating point operations

Nonlinear model predictive control hardware implementation w...

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Mediterranean Conference on Control and Automation (MED)

作者： Helon Ayala Renato Sampaio Daniel M. Muñoz Carlos Llanos Leandro Coelho Ricardo Jacobi Industrial and Systems Graduate Program Pontifical Catholic University of Parana Brazil Department of Mechanical Engineering University of Brasilia Brazil

Model predictive control (MPC) based techniques have found many applications both in academia and in industry. Its reach, however, may not be compared to classical control techniques due to e.g. the difficulty of solving an optimization problem at each sampling interval with real-time requirements. Most of the efforts to make the application of MPC viable address this problem with more efficient solvers. This paper, in contrast, proposes a new approach for a real-time MPC solution by mapping an approximate off-line solution into an artificial neural network in a FPGA (Field programmable Gate Array). We implemented a radial basis function artificial neural network on a low cost FPGA using custom precision floating point operations and tested the control on a single-link robotic manipulator. The amount of time used to calculate the control action at each time instant is in around one microsecond. The comparison between the offline and the approximate solution shows the soundness of the idea. We provide an analysis of hardware usage and execution time in order to achieve the best compromise considering the precision for a given application.

关键词： Hardware Field programmable gate arrays Optimization Real-time systems Neurons Predictive control Neural networks

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Study of cultivation and growth rate kinetic for mixed cultures of local microalgae as third generation (G-3) bioethanol feedstock in thin layer photobioreactor

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Journal of Physics: Conference Series 2018年第1期1022卷

作者： Wahyu Prihastuti Yuarrina Yano Surya Pradana Arief Budiman Akmal Irfan Majid Indarto Eko Agus Suyono Master Program of Systems Engineering Universitas Gadjah Mada Jalan Teknika Utara 3 Yogyakarta Indonesia Chemical Engineering Department Universitas Gadjah Mada Jalan Grafika No. 2 Yogyakarta Indonesia Center for Energy Studies Universitas Gadjah Mada Sekip K1a Yogyakarta Indonesia Mechanical and Industrial Engineering Department Universitas Gadjah Mada Jalan Grafika No. 2 Yogyakarta Indonesia Faculty of Biology Universitas Gadjah Mada Jalan Teknika Selatan Yogyakarta Indonesia

The increasing use of fossil fuels causes the depletion in supply and contributes to climate change by GHG emissions into the atmosphere. Microalgae indicate as renewable and sustainable energy sources as they have a high potential for producing large amounts of biomass for third-generation biofuels (bioethanol and biodiesel) feedstock. However, there are several parameters which should be considered for microalgae cultivation, such as environmental conditions, medium composition and microalgae species. The aim of this research was to study cultivation of mixed microalgae cultures (Glagah consortium and Arthrospira maxima) in a thin layer photobioreactor. Farmpion medium, Bold's Basal Medium (BBM) and Thoriq Eko Arief (TEA) medium were investigated as cultivation medium for bioethanol feedstock for 7 days. The results showed that the highest dry weight concentration of microalgae was in Farmpion medium (0.35 mg/ml) and the highest carbohydrate concentration of microalgae was in BBM (0.14 mg/ml). Thus, the optimum medium of microalgae cultivation for bioethanol feedstock was BBM because of the highest carbohydrate-dry weight ratio (0.88). In addition, mathematical approach by using Contois model was used to find out the growth rate of microalgae cultivation in each medium.

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Long term operation of a salinity gradient solar pond in northern Cyprus-experimental investigations and CFD simulation

Long term operation of a salinity gradient solar pond in nor...

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Energy Transport Processes 2016 - Core programming Area at the 2016 AIChE Spring Meeting and 12th Global Congress on Process Safety

作者： Obaidullah, Madina Kadyrov, Sultan Gorjinezhad, Soudabeh Taylan, Onur Torkmahalleh, Mehdi Amouei Ahmadi, Goodarz Sustainable Environment and Energy Systems Middle East Technical University Northern Cyprus Campus Guzelyurt Kalkanli Mersin 10 Turkey Chemical Engineering Program Middle East Technical University Northern Cyprus Campus Guzelyurt Mersin 10 Turkey Civil Engineering Department School of Engineering Nazarbayev University 53 Kabanbay batyr ave. Astana010000 Kazakhstan Mechanical Engineering Program Middle East Technical University Northern Cyprus Campus Guzelyurt Mersin 10 Turkey Chemical Engineering Department School of Engineering Nazarbayev University 53 Kabanbay batyr ave. Astana010000 Kazakhstan Mechanical Engineering Department Clarkson University PotsdamNY13699- 5725 United States

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One year operation of a salinity gradient solar pond in Northern Cyprus-experimental investigations and CFD simulation

One year operation of a salinity gradient solar pond in Nort...

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Emerging Technologies in Clean Energy 2016 - Topical Conference at the 2016 AIChE Spring Meeting and 12th Global Congress on Process Safety

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Sliding mode control for underactuated slosh-container system using collocated and non-collocated linearization

Sliding mode control for underactuated slosh-container syste...

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Indian Control Conference (ICC)

作者： Parth S Thakar B. Bandyopadhyay P. S. Gandhi Interdisciplinary Program in Systems and Control engineering Indian Institute of technology Bombay Mumbai India Department of Mechanical Engineering Indian Institute of technology Bombay Mumbai India

This work mainly deals with the sliding mode control for the sloshing liquid in a container using Collocated and Non-Collocated linearization techniques. The comparative study of these techniques is done for the first time for a slosh-container system, which represents a class of underactuated systems. A linear sliding surface based sliding mode control is derived for both the approaches which rejects the matched uncertainties or model mismatches and disturbances. Some remarkable comparative points are noted and highlighted with the supporting simulations.

关键词： Mathematical model Containers Liquids Dynamics Sliding mode control Vehicles Vehicle dynamics

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Hierarchical method for prioritization of sustainable products' characteristics

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Chemical engineering Transactions 2016年 52卷 529-534页

作者： Junior, Osiris Canciglieri Krüger, Suewellyn Sant'Anna, Angelo M.O. Industrial and Systems Engineering Graduate Program Pontifical Catholic University of Parana Rua Imaculada Conceição Curitiba1155 Brazil Mechanical Engineering Department Federal University of Bahia Rua Aristides Novis 2 Salvador Brazil

ISBN: (纸本)9788895608426

The conception of the manufacturing process to be initially applied in the parts rapid production targeting a first embodiment of an idea (prototypes) and without many demands on strength and accuracy is called rapid prototyping. New rapid prototyping technologies are more accessible under the aspects of cost, accuracy, usability, environmental and prototypes started to be increasingly explored in the sustainable product development process. This paper proposes the application of hierarchical analysis method to support the decision-making in Rapid Prototyping processes based on the analysis of product and RP technology and prototype characteristics. The application of the developed method consists of assigning numeric values to the product characteristics and to the important characteristics for users in order to build the comparison matrix to perform the assessment and the prioritization steps of the relevant features. Performing the prioritization of features considered most important along with the characteristics of the chosen prototyping technology make possible the analysis of the effect of the characteristics prioritization. The concepts of product development, rapid prototyping and analytic hierarchy process for the sustainable product were used in a structure (lightweight dual) to evaluate the proposed strategy. The lightweight dual product from the 3D printing technology has been successful to show the product's purpose and functionality due to its lower cost, short execution time, good surface finishing and dimensional accuracy. The results show that the analysis of the sustainable product for rapid prototyping technology based on characteristics prioritization strategy improves the product design. © 2016, AIDIC Servizi S.r.l.

关键词： Rapid prototyping

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