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Статті в журналах з теми "Operando monitoring":
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Lemineur, Jean-François, Jean-Marc Noël, Catherine Combellas, and Frederic Kanoufi. "(Invited) Operando Optical Monitoring of Nanoparticle Electrodeposition." ECS Meeting Abstracts MA2020-01, no. 18 (May 1, 2020): 1139. http://dx.doi.org/10.1149/ma2020-01181139mtgabs.
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Jin, Yan, Lin Zhou, Jianyu Yu, Jie Liang, Wenshan Cai, Huigang Zhang, Shining Zhu, and Jia Zhu. "In operando plasmonic monitoring of electrochemical evolution of lithium metal." Proceedings of the National Academy of Sciences 115, no. 44 (October 15, 2018): 11168–73. http://dx.doi.org/10.1073/pnas.1808600115.
Анотація:
The recent renaissance of lithium metal batteries as promising energy storage devices calls for in operando monitoring and control of electrochemical evolution of lithium metal morphologies. While the development of plasmonics has led to significant advancement in real-time and ultrasensitive chemical and biological sensing and surface-enhanced spectroscopies, alkali metals featured by ideal free electron gas models have long been regarded as promising plasmonic materials but seldom been explored due to their high chemical reactivity. Here, we demonstrate the in operando plasmonic monitoring of the electrochemical evolution of lithium metal during battery cycling by taking advantage of selective electrochemical deposition. The relationships between the evolving morphologies of lithium metal and in operando optical spectra are established both numerically and experimentally: Ordered growth of lithium particles shows clear size-dependent reflective dips due to hybrid surface plasmon resonances, while the formation of undesirable disordered lithium dendrites exhibits a flat spectroscopic profile with pure suppression in reflection intensity. Under the in operando plasmonic monitoring enabled by the microscopic morphology of metal, the differences of lithium evolutionary behaviors with different electrolytes can be conveniently identified without destruction. At the intersection of energy storage and plasmonics, it is expected that the ability to actively control and in operando plasmonically monitor electrochemical evolution of lithium metal can provide a promising platform for investigating lithium metal behavior during electrochemical cycling under various working conditions.
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Flores, Eibar, Nataliia Mozhzhukhina, Ulrich Aschauer, and Erik J. Berg. "Operando Monitoring the Insulator–Metal Transition of LiCoO2." ACS Applied Materials & Interfaces 13, no. 19 (May 4, 2021): 22540–48. http://dx.doi.org/10.1021/acsami.1c04383.
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Lonergan, Alex, Umair Gulzar, Yan Zhang, and Colm O'Dwyer. "Operando Photonic Stopband Monitoring of Lithium-Ion Battery Electrodes." ECS Meeting Abstracts MA2022-01, no. 1 (July 7, 2022): 112. http://dx.doi.org/10.1149/ma2022-011112mtgabs.
Анотація:
Research in lithium-ion batteries is often focused on optimising the electrode performance of either the anode1 or cathode2. One common research strategy is to explore alternative electrode material candidates for use as both the anode3 and cathode4. Another approach involves optimising the performance of existing electrode materials through structured electrode architectures with nano-sized features. Incorporating nanostructure into electrode design has reported advantages of shorter ion diffusion lengths and improved rate capability during cycling5. A common and simple technique for introducing nanostructure to electrodes is the use of a photonic crystal template, particularly inverse opal photonic crystals. The porous geometry, highly interconnected material and nano-sized features of the pore walls are all believed to contribute to improved electrochemical performance in inverse opal electrodes6 7. Photonic crystal materials are more than just a structural template and are renowned for their ability to tune the wavelengths of light propagating in the structure8 9. The repeating dielectric material comprising the structure reflects specific wavelengths, known as the photonic bandgap or stopband, depending on the size of the repeating lattice and the refractive index contrast between the composite materials. Tuning the photonic stopband of various inverse opal materials has been extensively studied10 11. Inverse opal battery electrodes have yet to exploit the optical potential of the photonic stopband. Here, we showcase a fundamentally new operando analysis technique for lithium-ion battery electrodes adopting a photonic crystal structure. Visible spectroscopy is used to monitor the presence and position of the photonic stopband of the electrode material during battery cycling, see Figure 1. Capitalizing on the sensitivity of the photonic stopband to lattice size and refractive index contrast, shifts or changes in the optical spectrum can be correlated to the electrode environment and material performance. Several optical effects are observed throughout the cycling process and linked back to the battery performance of the anode. A TiO2 inverse opal anode is reported on here, yet the technique is versatile and should be applicable to a wide range of electrode materials possessing a photonic crystal structure. References Kim, H.; Choi, W.; Yoon, J.; Um, J. H.; Lee, W.; Kim, J.; Cabana, J.; Yoon, W.-S., Exploring Anomalous Charge Storage in Anode Materials for Next-Generation Li Rechargeable Batteries. Chemical Reviews 2020, 120 (14), 6934-6976. Xu, J.; Dou, S.; Liu, H.; Dai, L., Cathode materials for next generation lithium ion batteries. Nano Energy 2013, 2 (4), 439-442. Liang, B.; Liu, Y.; Xu, Y., Silicon-based materials as high capacity anodes for next generation lithium ion batteries. Journal of Power Sources 2014, 267, 469-490. Manthiram, A.; Song, B.; Li, W., A perspective on nickel-rich layered oxide cathodes for lithium-ion batteries. Energy Storage Materials 2017, 6, 125-139. Mahmood, N.; Tang, T.; Hou, Y., Nanostructured Anode Materials for Lithium Ion Batteries: Progress, Challenge and Perspective. Advanced Energy Materials 2016, 6 (17), 1600374. McNulty, D.; Carroll, E.; O'Dwyer, C., Rutile TiO2 Inverse Opal Anodes for Li-Ion Batteries with Long Cycle Life, High-Rate Capability, and High Structural Stability. Advanced Energy Materials 2017, 7 (12), 1602291. McNulty, D.; Geaney, H.; Buckley, D.; O'Dwyer, C., High capacity binder-free nanocrystalline GeO2 inverse opal anodes for Li-ion batteries with long cycle life and stable cell voltage. Nano Energy 2018, 43, 11-21. John, S., Strong localization of photons in certain disordered dielectric superlattices. Phys. Rev. Lett. 1987, 58 (23), 2486-2489. Yablonovitch, E., Inhibited spontaneous emission in solid-state physics and electronics. Phys. Rev. Lett. 1987, 58 (20), 2059-2062. Schroden, R. C.; Al-Daous, M.; Blanford, C. F.; Stein, A., Optical Properties of Inverse Opal Photonic Crystals. Chemistry of Materials 2002, 14 (8), 3305-3315. Lonergan, A.; Hu, C.; O’Dwyer, C., Filling in the gaps: The nature of light transmission through solvent-filled inverse opal photonic crystals. Physical Review Materials 2020, 4 (6), 065201. Figure 1 (a) Schematic diagram of simultaneous electrochemical and optical characterisation techniques for photonic crystal electrodes. (b) Galvanostatic charge/discharge data for a TiO2 inverse opal electrode. (c) Optical spectrum for a TiO2 inverse opal submerged in LiPF6 electrolyte. (d) SEM image showing the ordered structure of a pristine TiO2 inverse opal. (e) Operando optical spectra obtained at 0.5 V intervals during discharge of the TiO2 inverse opal electrode. Figure 1
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Campillo-Robles, Jose Miguel, Damian Goonetilleke, Daniel Soler, Neeraj Sharma, Damian Martín Rodríguez, Thomas Bücherl, Malgorzata Makowska, Pinar Türkilmaz, and Volkan Karahan. "Monitoring lead-acid battery function using operando neutron radiography." Journal of Power Sources 438 (October 2019): 226976. http://dx.doi.org/10.1016/j.jpowsour.2019.226976.
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Bolli, Christoph, Aurélie Guéguen, Manuel A. Mendez, and Erik J. Berg. "Operando Monitoring of F– Formation in Lithium Ion Batteries." Chemistry of Materials 31, no. 4 (January 17, 2019): 1258–67. http://dx.doi.org/10.1021/acs.chemmater.8b03810.
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Wu, Xiaohan, Claire Villevieille, Petr Novák, and Mario El Kazzi. "Insights into the chemical and electronic interface evolution of Li4Ti5O12 cycled in Li2S–P2S5 enabled by operando X-ray photoelectron spectroscopy." Journal of Materials Chemistry A 8, no. 10 (2020): 5138–46. http://dx.doi.org/10.1039/c9ta14147b.
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Rodríguez-García, Laura, Roland Walker, Eyal Spier, Konrad Hungerbühler, and Fabian Meemken. "Mass transfer considerations for monitoring catalytic solid–liquid interfaces under operating conditions." Reaction Chemistry & Engineering 3, no. 1 (2018): 55–67. http://dx.doi.org/10.1039/c7re00179g.
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Köhnke, Katrin, Niklas Wessel, Jesús Esteban, Jing Jin, Andreas J. Vorholt, and Walter Leitner. "Operando monitoring of mechanisms and deactivation of molecular catalysts." Green Chemistry 24, no. 5 (2022): 1951–72. http://dx.doi.org/10.1039/d1gc04383h.
Анотація:
The review presents spectroscopic and mathematical tools to perform operando investigations of mechanisms and deactivation pathways in homogeneous catalysis. Their potential is shown in two case studies, hydroformylation and asymmetric hydrogenation.
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Strobel, Vinzent, Julian Jonathan Schuster, Andreas Siegfried Braeuer, Lydia Katharina Vogt, Henrik Junge, and Marco Haumann. "Shining light on low-temperature methanol aqueous-phase reforming using homogeneous Ru-pincer complexes – operando Raman-GC studies." Reaction Chemistry & Engineering 2, no. 3 (2017): 390–96. http://dx.doi.org/10.1039/c6re00228e.
Дисертації з теми "Operando monitoring":
1
Albero, Blanquer Laura. "Operando optical sensing for battery diagnosis." Thesis, Sorbonne université, 2022. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2022SORUS134.pdf.
Анотація:
Les batteries, qui constituent l'une des technologies de stockage d'énergie les plus polyvalentes, sont essentielles dans un large spectre d'applications telles que les réseaux électriques, l'aérospatiale, la robotique, et les véhicules électriques. Cette dépendance rend la qualité, la fiabilité, la durée de vie et la sécurité des batteries immensément plus importantes que jamais. Cela confirme la nécessité de surveiller avec précision l'état fonctionnel des batteries et appelle donc au développement de techniques de détection intelligente dans ces dispositifs. Cette thèse vise à explorer ce sujet en utilisant des capteurs à fibre optique à réseau de Bragg (FBG). Pour commencer, nous donnons un aperçu historique de l'évolution de la surveillance des batteries, avant de nous concentrer sur la détection optique. Ensuite, nous démontrons la faisabilité de l'incorporation de capteurs FBG à l'intérieur de cellules cylindriques et de poches commerciales pour effectuer une calorimétrie optique. Ensuite, en utilisant le même capteur optique, on étudie la contrainte chimico-mécanique qui se produit au niveau de l'électrode dans des cellules contenant un électrolyte liquide ou solide. Pour la validation du concept, des électrodes en alliage de Li qui présentent d'importants changements de volume lors de l'insertion ou du retrait de Li sont sélectionnées. Au cours de cette thèse, le signal optique surveillé pendant le cyclage de la batterie est traduit soit en température, pression ou stress et corrélé avec le profil de voltage. Enfin, ce travail propose une technique operando avec une utilisation potentiellement efficace pour le diagnostic des cellules et le design des batteriesRechargeable batteries, as one of the most versatile energy storage technologies, are essential in a broad range of applications such as power grids, aerospace, robotics, consumer electronics, and electric vehicles. Such dependence makes battery quality, reliability, lifetime, and safety (QRLS) immensely more important than ever before. This underlines the need to accurately monitor the batteries’ functional status and therefore calls for the development of non-invasive operando techniques that could inject smart sensing functionalities into these dynamic electrochemical devices directly from inside. This is exactly what this thesis aims to explore by using optical fiber Bragg grating (FBG) sensors. To begin with, we first provide an historical overview of the evolution of battery monitoring, before focusing on optical sensing. Then, we demonstrate the feasibility of incorporating FBG sensors inside commercial pouch and cylindrical cells to perform optical calorimetry, hence assessing chemical events such as solid electrolyte interphase formation or thermodynamic parameters. Next, by using the same optical sensor, the chemo-mechanical stress occurring at the electrode level in cells containing either liquid or solid-state electrolyte is investigated. For proof-of-concept, Li-alloying electrodes that undergo large volume changes upon Li uptake or removal are selected. More specifically, throughout this thesis the optical signal monitored during battery cycling is translated into either temperature, pressure or stress and correlated with the voltage profile. To sum up, this work proposes an operando technique with potential use in cell diagnosis and battery designs
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Tonso, Aldo. "Monitoramento e operação de cultivos de células animais em sistemas de perfusão." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-31072001-120313/.
Анотація:
Os processos biotecnológicos com células animais tem despertado interesse crescente devido à sua capacidade de sintetizar moléculas complexas de altíssimo valor agregado, mesmo exigindo condições especiais de cultivo. Torna-se portanto fundamental o correto monitoramento de tais processos, para se manter seus parâmetros dentro de limites desejados. O objetivo deste trabalho foi efetuar cultivos de células animais em processo de perfusão, aos quais se acoplavam sistemas de monitoramento visando melhor controle, de modo a contribuir para o aumento da produtividade. Realizaram-se ensaios com células BHK e hibridoma em biorreator de 12L em alta densidade celular (20E6 cel/mL), para produção de fator de coagulação FVIII e anticorpo anti-TNF. O processo de perfusão foi analisado, buscando-se melhoria em seu controle através da correta estimativa da concentração celular. O sistema de transferência de oxigênio através de membranas de silicone foi estudado, tendo-se elaborado uma simplificação para a estimativa da velocidade de consumo de oxigênio, baseando-a na pressão média da membrana de silicone, e tendo-se determinado a influência da concentração de oxigênio no crescimento e na produção e seu valor limitante (entre 5 e 10%). Por fim, estudou-se o efeito da osmolalidade do meio no processo, tanto com relação ao crescimento e consumo de substratos, como na produtividade. Observou-se o aumento do tamanho da célula com o aumento da osmolalidade (até 470mmol/kg) e como este fato influencia o cálculo da velocidade específica de produção. Tentou-se sem sucesso fazer um monitoramento on-line deste aumento de tamanho, com o uso da sonda Lasentec FBRM. No entanto esta se mostrou capaz de estimar a concentração celular. O trabalho demonstra a importância de se efetuar um adequado monitoramento do processo para garantir a correta operação, em especial em cultivos com células animais em perfusão.Animal cell culture technology has become apparent, due to its capacity to synthesize highly valuable complex molecules, even requiring special attention. In this scenario, adequate process monitoring becomes essential to keep its parameters well controlled. The aim of this work is to perform perfusion cultures with animal cells, and couple them to monitoring systems, in order to improve the efficiency of the control and consequently productivity. Runs were realized with BHK and hibridoma cells in a 12-L bioreactor at high cell density (20E6 cel/mL), to produce clotting factor FVIII and antibody anti-TNF. The perfusion process was analyzed, to enhance its control through reliable cell density estimate. Oxygen transfer system through silicone tubing was studied, resulting in a simple way to estimate oxygen uptake rate and establishing the influence of oxygen partial pressure in the growth and production. At last, medium osmolality effect was investigated related to growth, substrate consumption, and productivity. Cell enlargement was observed at higher osmolalities (till 470mmol/kg) and its results over the specific production rate were analyzed. The cell size change was measured off-line. Lasentec FBRM probe could not follow the size change, but showed capable to estimate cell density This work makes evident the importance in having adequate monitoring systems, in order to assure correct process operation, and specially cell culture perfusion processes.
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Spaulding, Scott A. "Improving medication adherence for children with asthma objective monitoring and feedback as an intervention for inhaled corticosteroid use /." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=1966.
Анотація:
Thesis (Ph. D.)--West Virginia University, 2001.Title from document title page. Document formatted into pages; contains vii, 60 p. : ill. Includes abstract. Includes bibliographical references (p. 39-42).
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Gorni, Daniel. "Modelagem para operação de Bus Rapid Transit." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-19012011-103449/.
Анотація:
Este trabalho é um modelo para controle de operação de frota de ônibus público urbano de baixa demanda, que objetiva o monitoramento (e intervenção, quando necessário), de forma que os ônibus monitorados cumpram a programação predeterminada pela grade-horária, evitando assim situações indesejáveis como atrasos ou congestionamentos nas estações de embarque e desembarque. A gestão do controle da movimentação dos ônibus se baseia em intervenções a serem realizadas na frota, considerando-se o sistema Bus Rapid Transit, que possui como grande diferencial as faixas segregadas para circulação dos ônibus. O objetivo é propor intervenções na frota (ações enviadas diretamente ao motorista como, por exemplo, diminuir a velocidade), e analisar os resultados, de forma a contribuir para diminuir dois grandes problemas em transporte público urbano: (1) o não cumprimento dos horários e (2) congestionamentos nas estações. Esses dois problemas geram reações em cadeia que acabam também afetando a regularidade de outros ônibus que compartilhar a mesma via e estações. Instituições públicas ou privadas de ônibus urbano podem obter benefícios utilizando um bom sistema de monitoramento e controle de frota, como por exemplo: mais segurança e previsibilidade nos horários, melhor adequação entre demanda e oferta do serviço, gerenciamento da frota através dos relatórios de pontualidade e desvio, dentre outros. Além disso, a melhora da qualidade do serviço traz como conseqüência o aumento no número de usuários do transporte, devido à oferta de um sistema mais atrativo, seguro e eficiente. A metodologia apresentada neste trabalho é constituída de um modelo para monitoramento da operação da frota e detecção de inconformidades dos ônibus, baseado na grade-horária e em um algoritmo de tomada de decisão, que objetiva a correção das inconformidades identificadas. Na tentativa de resolver (ou diminuir) os problemas que possam surgir durante a circulação dos ônibus, algoritmos (heurísticos) de decisão são utilizados em simulações de situações adversas. Com essas simulações é possível efetuar comparação das situações sem e com as intervenções propostas pelo algoritmo de decisão. Um sistema de informação geográfica é utilizado para manipulação dos dados e apresentação dos mesmos. De forma unifilar, é possível comparar as situações com e sem intervenções. Gráficos e tabelas complementam a apresentação dos resultados, onde é possível identificar e perceber a vantagem no monitoramento e intervenção na frota (a fidelidade à grade-horária melhora com as situações/intervenções simuladas).This dissertation is a model for management of urban public bus fleet operation control, aimed at monitoring (and intervention when necessary) so that the buses monitored meet the pre-determined schedule by the time-grid, thus avoiding undesirable situations such as delays or congestion in the stations of embarkation and disembarkation. The proposed operational management model and the interventions to be carried out in the fleet are possible considering the Bus Rapid Transit system that has segregated roads for the movement of buses. The goal is to propose interventions in the fleet (actions will be sent directly to the driver, like - change the bus velocity), and analyze the results in order to help reduce two major problems in urban public transport: (1) non compliance with the schedules and (2) congestion at stations. These two problems create chain reactions that end up affecting the regularity of other vehicles who share the same track and stations. Public or private urban bus institutes can benefit by using a good system of monitoring and control of the fleet, for example: more security and predictability in schedules, better match between demand and supply of the service, fleet management through the reports of punctuality and deviation, among others. Moreover, the improvement of service quality has as consequence the increase in the number of users of transport, due to availability of a more attractive, safe and efficient bus service. The methodology presented here consists of a model for fleet tracking (operation control) and tracing of unconformities buses based on time-grid and on an algorithm of decision-making that aims to correct non-conformities identified. In an attempt to solve (or reduce) the problems that may arise during the movement of buses, algorithms (heuristic) decision is used in simulations of adverse situations. In these simulations can be performed comparing the situations \"without\" and \"with\" the interventions proposed by the decision algorithm. A geographic information system is used for data manipulation and presentation of them. Using linear representation is possible to compare the buses situations with and without interventions. Charts and tables complement the presentation of results, where it is possible to identify and realize the advantage in monitoring and intervention in the fleet (fidelity to the time-grid improvement with the simulated situations/interventions).
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Grimoni, Jose Aquiles Baesso. "Protótipo de um conjunto de sistemas especialistas para operação, monitoração e manutenção de subestações." Universidade de São Paulo, 1994. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-19092017-083202/.
Анотація:
O trabalho apresenta o protótipo de um conjunto de sistemas especialistas para o auxílio na operação, monitoração e a avaliação do desempenho da manutenção de uma subestação de energia. Os sistemas especialistas propostos têm como objetivos básicos: o tratamento de alarmes da subestação, para depuração e triagem dos mesmos durante perturbações facilitando a análise e ações do operador; a localização de defeitos através da iteração entre alarmes gerados (fatos), regras que relacionam alarmes a causas (base de conhecimento) e a estrutura que relaciona este conjunto de regras (máquina de inferência); a reconfiguração da subestação para transferência de cargas entre circuitos através de um conjunto de manobras gerados por algoritmos de busca e de regras ligadas aos limites das grandezas elétricas dos equipamentos da rede; e ainda a análise do desempenho da manutenção baseada no conceito de índice de mérito operativo aplicado a subestações. O protótipo prevê o desenvolvimento utilizando a linguagem PROLOG, que é voltada para o tratamento declarativo de informações. Foram utilizados dados de uma subestação de uma empresa concessionária de energia para que se pudesse avaliar melhor o desenvolvimento das bases de conhecimento e da própria arquitetura do conjunto e de sua comunicação. Os testes efetuados mostraram resultados promissores e com grau de acerto elevado, o que indica que o sistema desenvolvido, é um embrião confiável para maiores sofisticações. O trabalho termina por apresentar estas novas possibilidades de aperfeiçoamento do sistema.This work presents a set of expert systems for operation , supervision and maintenance of a electrical energy substation. The function performed by the expert systems presented here are: alarm processing, fault diagnosis, reconfiguration and the analysis of the maintenance performance. The system was developed in PROLOG language. Substation characteristics, data and information has been provided by a São Paulo utility company. The knowledge basis for the expert systems was developed with basis in such information. Tests were carried out to verify this system performance including the architecture and communication. The results are very promising and with a high level of confidence, which means that this system can be used as a seed for future improvement. The work ends by suggesting such improvements and new applications.
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Torres, Gonçalo Sousa. "Development of an interface for operation and monitoring of an incremental forming machine." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/23696.
Анотація:
Mestrado em Engenharia MecânicaEsta dissertação de mestrado detalha o desenvolvido de uma interface gráfica para a máquina Single Point Incremental Forming - Aveiro (SPIF-A) com o objetivo de realização de diversas funções, nomeadamente a sua operação. Esta insere-se na unidade curricular Dissertação/Projeto/Estágio do segundo semestre do quinto ano do Mestrado Integrado em Engenharia Mecânica da Universidade de Aveiro. A SPIF-A é uma máquina de estampagem incremental que vem sendo desenvolvida por alunos, investigadores e professores do Departamento de Engenharia Mecânica da Universidade de Aveiro. O trabalho em seguida apresentado é a continuação deste mesmo projeto, sendo que o principal objetivo passou pelo desenvolvimento de uma interface gráfica para operação e monitorização da máquina. O projeto começou pela definição dos principais requisitos que a interface teria de cumprir. Em seguida, iniciou-se o desenvolvimento e o teste da interface gráfica numa instalação auxiliar, sendo a mesma mais tarde transferida e testada na instalação da SPIF-A. Foram realizados vários testes com a interface para detetar e corrigir o maior número possível de erros. Durante este período, foram também introduzidas algumas alterações no controlo da SPIF-A para melhorar a sua segurança e utilização. Para avaliar a facilidade e velocidade de operação da SPIF-A com a interface desenvolvida, produziram-se algumas peças usando o método antigo e a interface atual e registaram-se as principais diferenças. Para finalizar, foi revisto o design da interface para a tornar o mais amigável possível para o operador. Foi também criado um manual de utilização da interface, de modo a possibilitar uma rápida aprendizagem a um novo utilizador.
This master dissertation resumes the development of SPIF-A's graphical user interface with some required functions such as its operation and monitoring. The project is inserted in the curricular unit Dissertação/Projeto/Estágio of the second semester of the fth year of the Master's degree in Mechanical Engineering of the University of Aveiro. SPIF-A project is a single point incremental forming machine that has been developed by students, researchers and professors of the Department of Mechanical Engineering at the University of Aveiro. The work presented is the prolongation of this project, being the main goal the development of a graphical interface for operation and monitoring of the machine. Initially, the work focused in the de nition of the main requirements that the interface should ful ll as well as an analysis to its target users. Then, the interface development and testing started in a backup installation to prevent accidents due to programming errors, being later transfered to SPIF-A. Some tests were performed to detect and x as many errors as possible. During this period, some changes in SPIF-A's control were implemented to improve its security and operation. To validade the new interface performance, some parts were produced using both old and new methodologies and the main di erences were registered. Finally, the interface design was revised and a user's manual was written to facilitate the learning process for new users.
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Silva, Milthon Serna. "Sistema de monitoramento e metodologia de estimativa dos tempos de operação do disjuntor." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-06052005-143916/.
Анотація:
O presente trabalho visa o desenvolvimento de um sistema de monitoramento de disjuntor voltado a coletar informações para manutenção preditiva. São analisadas as características das variáveis que são monitoradas através de sensores ligados ao disjuntor, sua aquisição e o tratamento das informações. Um protótipo foi desenvolvido e instalado na subestação de Sumaré 440kV de ETEO (Empresa de Transmissão de Energia do Oeste Paulista). Um assunto importante para a manutenção é a avaliação dos tempos envolvidos na movimentação dos contatos principais do disjuntor principalmente na operação de abertura do curto circuito. Para tal é proposto um sistema não intrusivo que analise a oscilografia das tensões e correntes no disjuntor sincronizado com as correntes no circuito de disparo deste equipamento. A Transformada de Fourier aplicada no sinal de corrente/tensão sem perturbação permite determinar o valor do componente fundamental desse sinal. Com esse valor pode-se gerar uma senóide que superposta com o sinal coletado pelo oscilógrafo permite visualizar a alteração. A Transformada Wavelet é realizada através de filtros decompondo-se o sinal de corrente ou tensão em Análise Multiresolução, em diferentes estágios obtendo-se em cada, uma versão chamada aproximação (baixas freqüências) e uma de detalhes (altas freqüências), sendo assim, os distúrbios podem ser detectados e localizados no tempo em função do seu conteúdo de freqüência.The present work addresses the development of a circuit breaker monitoring system so as to collect information for predictive maintenance. The characteristics of the variables that are monitored through certain sensors linked to the circuit breaker, its acquisition and the treatment of the information, are analyzed. A prototype was developed and installed at the 440kV Sumaré substation of ETEO (Empresa de Transmissão de Energia do Oeste Paulista) a Brazilian Transmission Company. An important aspect for the maintenance is the evaluation of the times involved in the movement of the circuit breaker main contacts, mainly at the opening operation for example during a short circuit. On this respect, a non-intrusive system that analyzes the oscillography of both voltages and currents in the circuit breaker synchronized with the currents in the tripping circuit of this equipment is proposed. The Fourier Transform applied to the current or voltage signal with no disturbance allows to determine the value of the fundamental component of this signal. With that value, it can be generated a pure sine wave which when overlapped to the signal collected by the oscillograph allows to visualize alterations. The Wavelet Transform is realized through filters and decomposing the current or voltage signal through the Multiresolution Analysis at different levels, in this way, obtaining in each level, a version called approximation (low frequencies) and another with details (high frequencies), thus, the disturbances can be detected and located in the time and as a function of its frequency content.
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Palomino, Ricardo Luis Quiroz [UNESP]. "Desenvolvimento de sistemas eletrônicos para operação e monitoramento de parâmetros envolvidos na produção de biomassa a partir de microalgas em fotobiorreatores." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152048.
Анотація:
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
O efeito de diferentes condições para a produção de biomassa a partir do cultivo de microalgas em um fotobiorreator com iluminação com luz de LED foi estudado nesta dissertação. Com o objetivo de avaliar a produtividade de biomassa da espécie de microalga Scenedesmus sp, foram testadas quatro condições de cultivo no fotobiorreator, a saber: cultivo sem controle do fotoperíodo (iluminação durante todo o período de cultivo); cultivo com controle do fotoperíodo por um sistema eletrônico desenvolvido (12 horas de luz e 12 horas de escuro); cultivo com monitoramento da temperatura do ambiente a 20 °C; e, finalmente, cultivo com injeção de CO2 produzido por meio de um sistema de fermentação desenvolvido. O sistema eletrônico implementado é controlado por uma placa Arduino Uno, com as seguintes principais funções programadas no microcontrolador: controlar o fotoperíodo; monitorar a temperatura; e facilitar o acesso remoto aos dados dos sensores utilizados. O cultivo de microalgas da espécie Scenedesmus sp em fotobiorreator, durante 10 dias, mostrou ter uma produtividade modesta de 10,2 mg/l.dia, com um fotoperíodo de 24 horas de luz; de 13,5 mg/l.dia, com o controle do fotoperíodo de 12 horas de luz e 12 horas de escuro; de 17,8 mg/l.dia, com o monitoramento de temperatura em um ambiente com a temperatura controlada a 20 °C e controle do fotoperíodo de 12 horas de luz e 12 horas de escuro; e, finalmente, uma produtividade dentro dos níveis normais de 36,2 mg/l.dia, com o controle do fotoperíodo de 12 horas de luz e 12 horas de escuro e com a injeção do CO2 produzido durante aproximadamente 3 dos 10 dias de cultivo
The effect of different conditions for production of biomass from the microalgae culture in a photobioreactor with LED light was studied in this dissertation. In order to evaluate the biomass productivity of the Scenedesmus sp microalgae specie, four cultivation conditions were tested in the photobioreactor: uncontrolled photoperiod cultivation (lighting during the whole growing period); cultivation with control of the photoperiod by an electronic system developed (12 hours of light and 12 hours of darkness); cultivation with ambient temperature monitoring at 20 °C; and, finally, cultivation with controlled injection of CO2 produced by means of a developed fermentation system. The electronic system implemented is controlled by an Arduino Uno board with the following main functions programmed in the microcontroller: controlling of the photoperiod; temperature monitoring; and simplification of the remote access to the data of the sensors used. The microalgae cultivation of Scenedesmus sp species in photobioreactor for 10 days showed a modest productivity of 10.2 mg/l.day, with the control of photoperiod of 24 hours of light; 13.5 mg/l.day, with the controls of the photoperiod 12 hours of light and 12 hours of dark; 17.8 mg/l.day, with monitoring of temperature in an environment with a controlled temperature at 20 °C and photoperiod 12 hours of light and 12 hours of darkness; and, finally, a productivity with normal levels 36.2 mg/l.day, with the control of photoperiod of 12 hours of light and 12 hours of darkness and with the injection of the CO2 produced during approximately 3 of the 10 days of culture.
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Palomino, Ricardo Luis Quiroz. "Desenvolvimento de sistemas eletrônicos para operação e monitoramento de parâmetros envolvidos na produção de biomassa a partir de microalgas em fotobiorreatores /." Ilha Solteira, 2017. http://hdl.handle.net/11449/152048.
Анотація:
Orientador: Ricardo Alan Verdú RamosResumo: O efeito de diferentes condições para a produção de biomassa a partir do cultivo de microalgas em um fotobiorreator com iluminação com luz de LED foi estudado nesta dissertação. Com o objetivo de avaliar a produtividade de biomassa da espécie de microalga Scenedesmus sp, foram testadas quatro condições de cultivo no fotobiorreator, a saber: cultivo sem controle do fotoperíodo (iluminação durante todo o período de cultivo); cultivo com controle do fotoperíodo por um sistema eletrônico desenvolvido (12 horas de luz e 12 horas de escuro); cultivo com monitoramento da temperatura do ambiente a 20 °C; e, finalmente, cultivo com injeção de CO2 produzido por meio de um sistema de fermentação desenvolvido. O sistema eletrônico implementado é controlado por uma placa Arduino Uno, com as seguintes principais funções programadas no microcontrolador: controlar o fotoperíodo; monitorar a temperatura; e facilitar o acesso remoto aos dados dos sensores utilizados. O cultivo de microalgas da espécie Scenedesmus sp em fotobiorreator, durante 10 dias, mostrou ter uma produtividade modesta de 10,2 mg/l.dia, com um fotoperíodo de 24 horas de luz; de 13,5 mg/l.dia, com o controle do fotoperíodo de 12 horas de luz e 12 horas de escuro; de 17,8 mg/l.dia, com o monitoramento de temperatura em um ambiente com a temperatura controlada a 20 °C e controle do fotoperíodo de 12 horas de luz e 12 horas de escuro; e, finalmente, uma produtividade dentro dos níveis normais de 36,2 mg/l.dia, com o controle do... (Resumo completo, clicar acesso eletrônico abaixo)
Mestre
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Barros, Tomás. "Previsão do tempo de vida de fadiga da aeronave Epsilon TB-30 baseada em ensaios experimentais representativos da operação da aeronave em provetes que simulam as zonas críticas." Master's thesis, Academia da Força Aérea, 2019. http://hdl.handle.net/10400.26/39701.
Анотація:
Os objetivos do presente trabalho são a caracterização do regime de operação e a previsão do tempo de vida de fadiga da frota Epsilon TB-30 da Força Aérea Portuguesa, através da implementação de um sistema de Structural Health Monitoring na referida aeronave. A implementação deste sistema consistiu na instrumentação de uma das aeronaves da frota, através da instalação de um acelerómetro perto do centro de gravidade da aeronave, de cinco extensómetros em localizações críticas da mesma e de um sistema de aquisição de dados.
Esta instrumentação possibilitou a recolha de dados de voo que permitiram a definição de funções transferência, correlacionando a aceleração da aeronave com a extensão nas localizações críticas da mesma. A análise de dados de voo de aceleração provenientes de uma anterior instrumentação permitiu a obtenção do espetro de carga acumulado para 1000HV , na qual se utilizaram filtros de sinal e o método de contagem de ciclos level cross counting.
Com o objetivo de caracterizar o regime de operação da frota, estabeleceu-se uma comparação de severidade com o regime de operação de referência considerado pelo fabricante da aeronave. A metodologia utilizada consistiu no cálculo do dano acumulado e no estudo da propagação de fissuras, para a qual se geraram sequências de carga aleatórias a partir dos espetros de carga acumulados para 1000HV .
O estudo da propagação de fissuras incluiu uma componente numérica, através dos modelos de propagação de Walker e NASGRO implementados no software AFGROW © e de um modelo de elementos finitos desenvolvido no software ABAQUS©.
Adicionalmente, incluiu uma componente experimental, através de ensaios de fadiga com amplitude variável realizados no Instituto Superior Técnico. No âmbito da propagação de fissuras, projetou-se um provete representativo de uma das localizações críticas da aeronave numa liga de alumínio 2024-T351, no qual se inseriu um entalhe de canto por eletroerosão.
Os resultados do presente estudo poderão contribuir para um ajuste do programa de manutenção da aeronave e fornecer, ao fabricante, informação quantitativa dos esforços existentes nas localizações críticas da mesma.The objectives of this work are the characterization of the Portuguese Air Force Epsilon TB-30 fleet operation and the fatigue lifetime predicition with the implementation of a Structural Health Monitoring system in this aircraft. The implementation of this system comprised the installation of one accelerometer near the aircraft center of gravity, five strain sensors in five critical locations and a data acquisition unit. Flight data was recorded with this system, allowing the definition of transfer functions that correlate the aircraft acceleration with the strain in the critical locations. The analysis of acceleration flight data from a previous instrumentation, using signal filters and the level cross counting method, allowed the definition of the 1000 flight hours accumulated load spectrum. The objective of characterizing the fleet operation led to the need of establishing a severity comparison with the reference operation considered by the aircraft manufacturer. The methodology used in this work consisted of the accumulated damage calculation and a crack propagation study, for which random load sequences were generated based on the 1000 flight hours accumulated load spectra. The crack propagation study included a numerical approach with the Walker and NASGRO crack propagation models in the AFGROW© software and a finite element model developed in the ABAQUS© software. Additionally, it included an experimental approach with variable amplitude fatigue tests performed in Instituto Superior Técnico. In the scope of the crack propagation study, a 2024-T351 aluminium alloy representative specimen of one of the aircraft critical locations was designed, in which a corner notch was inserted by electrical discharge machining. The results of the present study may contribute to a possible change of the aircraft maintenance program and provide quantitative information about the stresses in the aircraft critical locations to the manufacturer.
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Книги з теми "Operando monitoring":
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Friedrich, Alexander, Petra Gehring, Christoph Hubig, Andreas Kaminski, and Alfred Nordmann, eds. Steuern und Regeln. Nomos Verlagsgesellschaft mbH & Co. KG, 2019. http://dx.doi.org/10.5771/9783845296548.
Анотація:
In the traditional philosophy of technology, the two main modus operandi found in conventional technology are categorised and described under the terms ‘control’ and ‘regulation’ as a way of differentiating between them. This occurs for two reasons: on the one hand, in order to specify the difference between the forms of technology that have been developed by since the Neolithic revolution and the ‘accidental’ technology (as discussed by Ortega y Gasset) of higher species or prehistoric man, and on the other to reveal the relationship between technology and (natural) science more precisely. In the meantime, however, modern technologies and new epistemic practices are challenging historical descriptions of the nature of technoscience and the dichotomy between ‘control’ and ‘regulation’ respectively. Bearing in mind the so-called new emerging sciences and technologies (NEST) and other developments in IT, cognitive technology, nanotechnology and biotechnology, this volume examines who or what can be conceptualised as the subject of processes of control and regulation. In terms of large-scale systems and the organisation of large social structures, methods of control are becoming increasingly problematic because digital information technologies especially are creating new, diverse ways of manipulating and regulating processes or conditions, for example monitoring, big data and profiling, while the counteractive consequences of the same development, for example the ever-increasing amount of data, acceleration, automatisation and the logic of sociotechnical infrastructures, are increasingly throwing the possibility of coordinated control into doubt.
Частини книг з теми "Operando monitoring":
1
Klinser, G., S. Topolovec, H. Krenn, and R. Würschum. "Process Monitoring of Charging/Discharging of Lithium Ion Battery Cathodes by Operando SQUID Magnetometry." In Encyclopedia of Interfacial Chemistry, 849–55. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-12-409547-2.14200-3.
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Al Sandi, Yousuf Anwar, and Bernard Haber Ugalde. "Social Networking Sites Classroom Framework using Operant Conditioning of Learning." In Research Anthology on Applying Social Networking Strategies to Classrooms and Libraries, 248–59. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-7123-4.ch014.
Анотація:
In this information age, educational institutions have innovated to take the teaching and learning process to the next level. They are now infusing social media and social networks with traditional teaching as a method of instruction inside the classroom. Various studies have been carried out to find and suggest what social network is the best fit to adopt to education in general. However, there are no known standards on how to implement learning in social networks particularly in monitoring and responding to student behavior. This research is premised on the fact that positive response should be reinforced, and negative behavior is punished. Thus, this article presents how to use operant conditioning of learning inside a social network, particularly in managing a student's behavior. It was observed that there is an impact on the performance of students who used the developed classroom framework as compared to who did not. The result confirms that a monitored and guided social network approach can benefit students.
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Gellert, Raphaël. "Data protection as command and control regulation." In The Risk-Based Approach to Data Protection, 54–86. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198837718.003.0003.
Анотація:
Chapter 2 demonstrates that data protection can be understood as command and control regulation by applying the three constitutive elements of regulation (standard setting, monitoring, behaviour control) thereto. If one wants to understand the modus operandi of newer models of regulation as applied to data protection (namely risk-based model of regulation), one must first understand the basis. That is, how data protection can be understood as regulation in the first place. This standpoint has another corollary. Since newer models of regulation are featured in contemporary statutes (with the GDPR as a prime example), an understanding of data protection as command and control regulation entails to study less contemporary statutes. The prime case study will therefore be the EU Data Protection Directive, which, even though not in force anymore is considered a suitable case for analysis as it embodies earlier models of regulation. Because this chapter is retrospective in scope (i.e. looking at previous data protection statutes in order to better understand the current ones), it often refers to historical sources of data protection (e.g. statutes and literature).
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Waltz, Thomas J., and Claudia Drossel. "Primer on Basic Behavioral Principles." In The Oxford Handbook of Acceptance and Commitment Therapy, C3.P1—C3.N3. Oxford University Press, 2022. http://dx.doi.org/10.1093/oxfordhb/9780197550076.013.3.
Анотація:
Abstract Behavioral principles guided the initial development of acceptance and commitment therapy (ACT) and serve as the foundation for its flexible implementation. This article provides a broad introduction to the contextual approach to operant behavior, including behavioral principles, behavioral economics, and rule-governed behavior. Key applications of these relations include taking a constructional approach to building meaningful patterns of behavior that are supported by naturalistic contingencies outside of the therapeutic relationship, evaluating function-based hypotheses by monitoring response to treatment and other key variables, and occasionally systematically evaluating treatment outcomes using single-subject research designs. Examples used throughout the article help connect these foundational concepts to ACT practice. Behavioral principles support clinicians in taking a scientist-practitioner approach to ACT implementation and can support competent innovation while maintaining fidelity to the underlying functional contextual model.
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Wright, Sarah J., Kate A. Helbig, Stefanie R. Schrieber, James R. Derieux, and Evan H. Dart. "Behavior Assessment." In Handbook of Behavioral Interventions in Schools, 50–70. Oxford University Press, 2019. http://dx.doi.org/10.1093/med-psych/9780190843229.003.0004.
Анотація:
Behavior assessment describes the process of quantifying an operant dimension of student behavior, such that decisions can be made about the need for or effect of interventions. Assessment of behavior is essential to the successful implementation of intervention strategies, with failure of interventions often being attributed to lack of adequate assessment. The chapter describes the four primary purposes of behavioral assessment: universal screening, pre-intervention assessment, progress monitoring, and summative assessment. Next, the chapter describes various methods for assessment of behavior that may be utilized in school settings. Information is provided regarding direct behavior assessment and systematic direct observation, as well as systems for collecting such data on individual students and groups of students. Indirect behavior assessment through interviews, rating scales, office discipline referrals, and direct behavior ratings are also discussed. Finally, issues related to applied use of the described assessment tools are described.
Тези доповідей конференцій з теми "Operando monitoring":
1
Li, Yanpeng, Ziyun Miao, Xiangpeng Xiao, Zhen Li, Zhijun Yan, and Qizhen Sun. "Implantable optical fiber sensor for monitoring the stress evolution in lithium-sulfur battery." In CLEO: Applications and Technology. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_at.2022.atu5m.4.
Анотація:
We report the implantable optical fiber sensor for monitoring the cathode stress evolution in the lithium-sulfur battery. The operando decoding of the chemo-mechanics events of Li-sulfur battery is successfully realized.