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24th International Conference on Miniaturized systems for Chemistry and Life Sciences, MicroTAS 2020

作者： Chan, Katherine Navi, Maryam Kieda, Jennifer Tsai, Scott S.H. Graduate Program in Biomedical Engineering Ryerson University Toronto Canada Department of Mechanical and Industrial Engineering Ryerson University Toronto Canada Keenan Research Center for Biomedical Science St. Michael's Hospital Toronto Canada

ISBN: (纸本)9781733419017

In the field of intracellular phase separation, characterizing the composition and formation of liquid-like organelles is important to understanding their functional relevance. We introduce a microfluidic assay for in vitro testing of formation of these intracellular compartments where water-in-oil droplets containing different concentrations of phase separating components are generated. This platform has the distinct advantage of high-throughput, minimal reagent experiments that enables the necessary data collection and qualitative observation of conventional bulk methods. © 2020 CBMS-0001

关键词： Phase separation

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Exploring Bess Services for Transformer Energization on Offshore Oil and Gas Platforms

Exploring Bess Services for Transformer Energization on Offs...

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2024 IEEE Petroleum and Chemical Industry Conference Brasil, PCIC Brasil 2024

作者： Banda, Joseph K. Araujo, Lucas S. Brandao, Danilo I. Marafao, Fernando P. Tedeschi, Elisabetta Department of Electric Power Engineering Trondheim Norway Graduate Program in Electrical Engineering Belo Horizonte Brazil Department of Control and Automation Engineering Sorocaba Brazil University of Trento Department of Industrial Engineering Trento Italy

ISBN: (纸本)9798350368154

The electrification of offshore oil and gas platforms (OOGPs), using offshore wind turbines, is now a reality, aimed at minimizing carbon emissions. In this scenario, the utilization of battery energy storage systems (BESS) improves both efficiency and power quality. As this integration comes with a high CAPEX, industries demand exploring BESS for multiple ancillary services on OOGPs. Thus, this paper proposes an alternative approach to energizing a power transformer (PT) using the BESS power conversion system (PCS) on the platform, aiming to minimize inrush currents. This avoids the necessity for additional bulky devices, converters, or dc voltage sources specifically designated for this purpose. The strategy consists of manipulating residual core flux using BESS PCS followed by a controlled switching, which reduces inrush currents during PT energization. The results show effective reduction of the inrush current from 2.31 pu to 0.16 pu for the presented case study. © 2024 IEEE.

关键词： Power transformers

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Wavelet neural network approach applied to biomechanics of swimming

Wavelet neural network approach applied to biomechanics of s...

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2013 13th UK Workshop on Computational Intelligence, UKCI 2013

作者： Puchalski, Weslly Mariani, Viviana Cocco Schauenburg, Felipe Fidelis Dos Santos Coelho, Leandro Industrial and Systems Engineering Graduate Program PPGEPS Pontifical Catholic University of Parana Curitiba Brazil Department of Mechanical Engineering PPGEM Pontifical Catholic University of Parana Federal University of Parana Curitiba Brazil Department of Electrical Engineering Pontifical Catholic University of Parana Federal University of Parana Curitiba Brazil

ISBN: (纸本)9781479915682

An artificial neural network (ANN) consists of a number of interconnecting artificial neurons and employs mathematical or computational models for information processing. ANNs are suitable for handling large amounts of dynamic, noisy and nonlinear data. On the other hand, the wavelet theory provides a multi-resolution approximation for discriminate functions. The combination of the wavelet transforms theory with the basic concept of ANNs leads to new mapping networks called wavelet neural networks (WNNs) or wavenets, which are proposed as an alternative to feedforward ANNs for approximating arbitrary nonlinear functions. Generalized from radial basis function ANNs, WNNs are in fact feed-forward neural networks with one hidden layer, radial wavelets as activation functions in the hidden nodes and a linear output layer. The contribution of this paper is to evaluate the WNNs to model a parathlete swimmer behavior. The parathlete swimmer swims the breaststroke style using biomechanics data generated by the software tool called SWUMSUIT, which was developed in Tokyo Technological Institute in Japan. The forecasted results clearly show that WNN has good prediction properties. The proposed WNN modeling approach can benefit disabled swimmers (parathletes) to gain competitive advantage by studying the biomechanics involved in the sport and considering the help of simulations systems. © 2013 IEEE.

关键词： Biomechanics

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Applications of multi-objective optimisation for PID-like controller tuning: a 2015-2019 review and analysis

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IFAC-PapersOnLine 2020年第2期53卷 7933-7940页

作者： Tainara Marques Gilberto Reynoso-Meza Industrial and Systems Engineering Graduate Program (PPGEPS) Pontifical Catholic University of Parana (PUCPR) CuritibaPR Brazil

The first open invited track in multi-objective optimisation for control systems was organised in 2017 with the idea of exchanging ideas and research about how those techniques are valuable for control engineers. Given that control engineering problems are generally multi-objective problems, multi-objective optimisation offers an interesting approach via the simultaneous optimisation of all design objectives. Controller tuning is not except from this. In this paper we perform a review and analysis of the literature, limited to the IFAC environment, to appreciate and detect new tendencies in controller tuning applications via multi-objective optimisation. Time window under consideration is from 2015 to date, coinciding with a previous review on the topic, as well as the emigration of IFAC proceedings to Elsevier.

关键词： Multi-objective optimisation Parametric optimisation Evolutionary Algorithms Intelligent Control Process Control

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Modeling of a 2-DOF Piezoelectric Micromanipulator at High Frequency Rates through Nonlinear Black-box System Identification

Modeling of a 2-DOF Piezoelectric Micromanipulator at High F...

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2018 Annual American Control Conference, ACC 2018

作者： Ayala, Helon Vicente Hultmann Rakotondrahe, Micky Coelho, Leandro Dos Santos Pontifical Catholic University of Rio de Janeiro Department of Mechanical Engineering Brazil Industrial and Systems Engineering Graduate Program Pontifical Catholic University of Paraná Brazil FEMTO-ST Institute Université Bourgogne Franche-Comté CNRS Besançon France Department of Electrical Engineering Federal University of Paraná Brazil

ISBN: (纸本)9781538654286

In the present paper we proceed the data-driven modeling of a two degrees of freedom (2-DOF) piezoelectric micromanipulator through models with the Nonlinear AutoRegressive with eXogenous inputs (NARX) structure and real acquired data. We show the results when the system is excited at high frequencies, aiming towards rapid and precise micropositioning. The order of NARX the models are increased until they satisfy the statistical tests based on higher-order correlations and the multiple correlation coefficients, which are close to unity for both measured outputs. The results herein presented encourage the use of data-driven methods for modeling piezoelectric micromanipulators. © 2018 AACC.

关键词： Data models Mathematical model Micromanipulators Analytical models Actuators"

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Hydrodynamic forces and motion responses of feeding platform and sea cages

Hydrodynamic forces and motion responses of feeding platform...

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27th International Conference on Offshore Mechanics and Arctic engineering, OMAE 2008

作者： Ito, Sho Kinoshita, Takeshi Kitazawa, Daisuke Tsunoda, Tomoyuki Bao, Weiguang Itakura, Hiroshi Fujino, Masatoshi Dept. of Environmental and Ocean Engineering Graduate School of Engineering University of Tokyo Japan Dept. of Mechanical and Biofunctional Systems Institute of Industrial Science University of Tokyo Japan

ISBN: (纸本)9780791848234

With the increasing world demand for seafood and environmental problems in coastal aquaculture, offshore area has been increasingly expected to be utilized for aquaculture. The offshore aquaculture system has fewer effects on the surrounding marine environment through the rapid diffusion of organic wastes from the cultured fish than the coastal one. The offshore area then provides clean waters for cultured fish. On the other hand, the offshore aquaculture system is subject to the harsh natural condition such as typhoon attack. Actually, in the current aquaculture system, the offshore fish cages are submerged every time around 10m below the sea surface to escape from high waves and strong currents. However, the safety of the sea cage against the incident wave has not been examined, while that against the water current has been analyzed by tank model test and numerical simulation. In the present study, therefore, the hydrodynamic forces on the submerged sea cage from the incident wave were investigated by the tank model test, and the motion of the submerged sea cage was observed. As a result of the forccd oscillation test, the numerical values of the added mass and damping coefficient of the sea cage scatter according to the wave amplitude for the same frequency of the forced oscillation. The difference in the added mass may be attributed to the effects of ladder and the bending of the net. The current analysis is focused on modeling of the bending of the net. Then the difference was also found in the damping coefficient at the same frequency of the forced oscillation. The damping coefficient based on viscosity was separated by the equivalent linearization using the equation of Morison's drag force. As a result, the scattering of the damping coefficient was reduced, adjusting the drag coefficient. It is a future study to examine the relationship between each mode of the motion of the sea cage and the adjusted drag coefficient. As for the experiment of the mooring syst

关键词： Fish

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Multiscale investigation of seismic precursors before major earthquakes

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Mechanics Research Communications 2025年 147卷

作者： Leandro Ferreira Friedrich Mariana Hamdan Padilha Giuseppe Lacidogna Ignacio Iturrioz Department of Structural Geotechnical and Building Engineering Politecnico di Torino 24 Corso Duca degli Abruzzi 10129 Torino Italy Mechanical Post-Graduate Program Universidade Federal do Rio Grande do Sul Sarmento Leite 425 CEP 90050-170 Porto Alegre Brazil

In various mechanical systems, the study of damage processes can be approached from the perspective of continuous phase transition phenomena, a subject typically explored within the framework of statistical physics. This viewpoint enables a more refined interpretation of failure precursors, which are of great importance in the field. The present study investigates failure precursors through two case studies: the material failure process by using the Fiber Bundle Model and the seismicity of the 2023 Turkey Mw7.7 earthquake. To identify the criticality, two approaches are considered: (1) Natural Time (NT) analysis and (2) the Method of Critical Fluctuation-Based (MCF-B) approach. By comparing the evolution of precursors in both cases, the findings highlight their potential for predicting critical situations.

关键词： Large scale systems

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The cost of policy uncertainty in electric sector capacity planning: Implications for instrument choice

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Electricity Journal 2018年第1期31卷 33-41页

作者： Leibowicz, Benjamin D. Graduate Program in Operations Research and Industrial Engineering The University of Texas at Austin ETC 5.128D 204 E. Dean Keeton St. C2200 AustinTX78712 United States

A stochastic energy system optimization model is developed to investigate capacity planning under policy uncertainty in the ERCOT area. The optimal hedging strategy under carbon tax uncertainty is to delay decarbonization, but an uncertain carbon cap or renewable portfolio standard precludes this approach. The cost of policy uncertainty is found to be higher under a carbon cap than a tax, and highest under an RPS. Uncertainty considerations appear to favor price-based over quantity-based instruments. © 2017 Elsevier Inc.

关键词： Stochastic programming

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Numerical Investigation Effect of the addition of palm fronds on the burning of coal-fired boilers tangentially

Numerical Investigation Effect of the addition of palm frond...

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2023 International Conference on Advanced Mechatronics, Intelligent Manufacture and industrial Automation, ICAMIMIA 2023

作者： Ihsan, Sobar Prabowo Widodo, Wawan Aries Adi Saputra, I Nyoman Agus Institut Teknologi Sepuluh Nopember Graduate Program of Mechanical Engineering Department Surabaya Indonesia University of Islam Kalimantan Maab Indonesia Institut Teknologi Sepuluh Nopember Mechanical Engineering Department Surabaya Indonesia

ISBN: (纸本)9798350309225

Biomass co-firing is an appropriate and cheap solution for achieving renewable energy targets towards net zero emissions because it can reduce the potential environmental impacts associated with burning fossil fuels. CFD simulations were carried out by adding palm frond biomass with a ratio of 5% and 95% LRC coal, which was injected into the boiler combustion furnace. The boiler operational parameters used in this simulation are a coal flow rate of 151.75 tons/hour and an airflow rate of 1184.33 tons/hour on the research subject PLTU Pacitan with a capacity of 315 Mw. The results show that adding palm frond biomass to burning coal changes calorific value, affecting the combustion process's high temperature. However, it has a good impact from the operational side of burning coal particles. © 2023 IEEE.

关键词： Biomass

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A Mixed Integer Linear programming for COVID-19 Related Medical Waste Reverse Logistics Network Design 22

A Mixed Integer Linear Programming for COVID-19 Related Medi...

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4th International Conference on Management Science and industrial engineering, MSIE 2022

作者： Santos, Aira Ronalie P. Maghfiroh, Meilinda Fitriani Nur Sapiter, John Rayam Prasetyo, Yogi Tri Redi, Anak Agung Ngurah Perwira Persada, Satria Fadil Young, Michael Nayat Nadlifatin, Reny Ardiansyahmiraja, Bobby School of Industrial Engineering and Engineering Management Mapua University Manila Philippines Department of Industrial Engineering Universitas Islam Indonesia Yogyakarta Indonesia Industrial Engineering Department Binus Graduate Program - Master of Industrial Engineering Bina Nusantara University Jakarta Indonesia Department of Information Systems Institut Teknologi Sepuluh Nopember Surabaya Indonesia Faculty of Business and Economics Universitas Surabaya Surabaya Indonesia

ISBN: (纸本)9781450395816

Medical wastes bring probable hazards and public risks if not handled correctly, especially during the covid-19 pandemic. Waste management costs are rising due to continues devastation of covid-19 virus. Increased care and handling processes have been implemented to avoid further spreading the infection while ensuring the proper disposal. Given this, medical waste related to covid-19, including other wastes generated by medical facilities, requires delicate integration into the waste management process thru a reverse logistics network for cost-efficient collection, processing, and transport style. Using AMPL software as solving tool, this paper was designed to utilize a mixed-integer linear programming model of a reverse logistics network to improve medical waste management by identifying the total minimum cost of the waste disposal cycle from Waste generating facilities, treatment facilities, and to the disposal factory. © 2022 ACM.

关键词： COVID-19

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