Bibliographies thématiques / Cstnur

Littérature scientifique sur le sujet « Cstnur »

Auteur : Grafiati

Publié le 11 mars 2023

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Articles de revues sur le sujet "Cstnur"

Cruz-Flores, Gerardo, Eloisa A. Guerra-Hernández, Juan M. Valderrábano-Gómez et Julio Campo-Alvés. « Indicadores de calidad de suelos en bosques templados de la Reserva de la Biosfera los Volcanes, México ». REVISTA TERRA LATINOAMERICANA 38, n^o 4 (11 octobre 2020) : 781–93. http://dx.doi.org/10.28940/terra.v38i4.421.

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La degradación y erosión edáfica por cambios de uso suelo, disminuyen los contenidos de carbono y su calidad. Con el objetivo de identificar y reconocer los mejores indicadores de calidad edáfica y de relacionarla con sus contenidos de carbono orgánico, se realizó esta investigación en bosques de la Reserva de la Biósfera los Volcanes. Se seleccionaron 26 sitios distribuidos entre 2600 y 3800 m de altitud colectando muestras de suelo de 0 a -0.2 m para análisis físicos y químicos y entre 0 a -0.1 m para bioquímicos y biológicos. Los resultados mostraron como excelentes indicadores parciales para evaluar calidad del suelo (IpCS) al pH, porcentaje de arena; contenido gravimétrico de agua, carbono orgánico, Ca+2 y K+ intercambiables; carbono de biomasa microbiana y actividad fosfatasa ácida y presencia/abundancia de bacterias y algas. Con estos IpCS, se determinó aditiva y conmutativamente, calidad total del suelo (CSTsum y CSTmul) cuyas tendencias fueron similares, aunque el modelo aditivo, muestra mejor que bosques afectados y vegetación secundaria (2600 y 2700 m) tienen menor calidad edáfica, mientras que en la franja media (3000-3300 m) con bosques de Abies y mixto Abies-Pino, los suelos tuvieron mayores contenidos de carbono orgánico y altas CSTsum y CSTmul.

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Fu, Ning, Xue-chang Ren et Jian-xin Wan. « The Effect of Molar Ratios of Ti/Si on Core-Shell SiO2@TiO2 Nanoparticles for Photocatalytic Applications ». Journal of Nanomaterials 2020 (27 avril 2020) : 1–11. http://dx.doi.org/10.1155/2020/5312376.

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After the core-shell SiO2@TiO2 nanoparticles (CSTNs) were synthesized by hydrothermal method, we investigated the influence of different molar ratios of Ti/Si on morphology, structure, and photocatalytic activity of the CSTNs. It was found that the CSTNs showed different size and surface morphology as the Ti/Si molar ratio changed. Besides, the TiO2 and the CSTN had the anatase phase after hydrothermal process and calcination at 450°C for 2 h. The N2 adsorption-desorption isotherms demonstrated the CSTNs with the molar ratio of Ti/Si increased from 1 : 1 to 8 : 1 can be categorized as type IV with hysteresis loop of type H2 and showed to be mesoporous materials. In addition, the CSTNs with the Ti/Si molar ratio of 5 : 1 had the highest surface area of 176.79 m2/g. Surface charges showed the isoelectric point (IEP) of the CSTNs ranged between silica (IEP at pH 3.10) and titania (IEP at pH 5.29). Since the molar ratio of Ti/Si increased from 1 : 1 to 8 : 1 by degradating both colorless organic pollutant of phenol and colored substances of methylene blue (MB) under UV irradiation, the photocatalytic activity of CSTNs exhibited higher photodegradation efficiency compared with TiO2. What is more, the experimental results also showed the CSTNs with Ti/Si molar ratio of 5 : 1 had the highest photocatalytic activity and showed higher photocatalytic efficiency compared with other TiO2-SiO2 composites reported for photodegradation of phenol and MB.

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Hunsberger, Luke, et Roberto Posenato. « Faster Dynamic-Consistency Checking for Conditional Simple Temporal Networks ». Proceedings of the International Conference on Automated Planning and Scheduling 30 (1 juin 2020) : 152–60. http://dx.doi.org/10.1609/icaps.v30i1.6656.

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A Conditional Simple Temporal Network (CSTN) is a structure for representing and reasoning about time in domains where temporal constraints may be conditioned on outcomes of observations made in real time. A CSTN is dynamically consistent (DC) if there is a strategy for executing its time-points such that all relevant constraints will necessarily be satisfied no matter which outcomes happen to be observed. The literature on CSTNs contains only one sound-and-complete DC-checking algorithm that has been implemented and empirically evaluated. It is a graph-based algorithm that propagates labeled constraints/edges. A second algorithm has been proposed, but not evaluated. It aims to speed up DC checking by more efficiently dealing with so-called negative q-loops.This paper presents a new two-phase approach to DC-checking for CSTNs. The first phase focuses on identifying negative q-loops and labeling key time-points within them. The second phase focuses on computing (labeled) distances from each time-point to a single sink node. The new algorithm, which is also sound and complete for DC-checking, is then empirically evaluated against both pre-existing algorithms and shown to be much faster across not only previously published benchmark problems, but also a new set of benchmark problems. The results show that, on DC instances, the new algorithm tends to be an order of magnitude faster than both existing algorithms. On all other benchmark cases, the new algorithm performs better than or equivalently to the existing algorithms.

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Ma, Yongzheng, Jiangning Chen et Kai Nan. « Global Collaborations in CSTNET ». Proceedings of the Asia-Pacific Advanced Network 37 (7 juin 2014) : 1. http://dx.doi.org/10.7125/apan.37.1.

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Posenato, Roberto. « CSTNU Tool : A Java library for checking temporal networks ». SoftwareX 17 (janvier 2022) : 100905. http://dx.doi.org/10.1016/j.softx.2021.100905.

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Li, Linxuan, Tingting Zhu, Lele Huang et Maozhi Ren. « Target of Rapamycin Signaling Involved in the Regulation of Photosynthesis and Cellular Metabolism in Chlorella sorokiniana ». International Journal of Molecular Sciences 23, n^o 13 (4 juillet 2022) : 7451. http://dx.doi.org/10.3390/ijms23137451.

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Target of rapamycin (TOR) is a serine/threonine protein kinase that plays a central regulating role in cell proliferation, growth, and metabolism, but little is known about the TOR signaling pathway in Chlorella sorokiniana. In this study, a Chlorella sorokiniana DP-1 strain was isolated and identified, and its nutritional compositions were analyzed. Based on homologous sequence analysis, the conserved CsTOR protein was found in the genome of Chlorella sorokiniana. In addition, the key components of TOR complex 1 (TORC1) were present, but the components of TORC2 (RICTOR and SIN1) were absent in Chlorella sorokiniana. Pharmacological assays showed that Chlorella sorokiniana DP-1 was insensitive to rapamycin, Torin1 and KU0063794, whereas AZD8055 could significantly inhibit the growth of Chlorella sorokiniana. RNA-seq analysis showed that CsTOR regulated various metabolic processes and signal transduction pathways in AZD8055-treated Chlorella sorokiniana DP-1. Most genes involved in photosynthesis and carbon fixation in Chlorella sorokiniana DP-1 were significantly downregulated under CsTOR inhibition, indicating that CsTOR positively regulated the photosynthesis in Chlorella sorokiniana. Furthermore, CsTOR controlled protein synthesis and degradation by positively regulating ribosome synthesis and negatively regulating autophagy. These observations suggested that CsTOR plays an important role in photosynthesis and cellular metabolism, and provide new insights into the function of CsTOR in Chlorella sorokiniana.

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Novotný, Vít. « Příprava Zpravodaje CSTUG ». Zpravodaj Československého sdružení uživatelů TeXu 28, n^o 1-4 (2018) : 1–10. http://dx.doi.org/10.5300/2018-1-4/1.

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Novotný, Vít. « Příprava Zpravodaje CSTUG ». Zpravodaj Československého sdružení uživatelů TeXu 28, n^o 3-4 (2018) : 1–10. http://dx.doi.org/10.5300/2018-3-4/1.

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Jin, Xiao Ping, Hui Zhen Feng et You Ming Li. « Cooperative Space-Time Network Coding for Multi-Sources Distributed Cooperative Network ». Applied Mechanics and Materials 651-653 (septembre 2014) : 1816–20. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.1816.

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In this paper, a novel cooperation space-time network coding (CSTNC) scheme based on multi-sources distributed cooperative network is considered. In this scheme, multiple sources transmit signals to relay and destination node. The relay re-encodes the decoded signals through space-time network coding with the aid of multiple antennas. The simulation shows that the BER, capacity and outage probability of the CSTNC becomes better with the increasing of relay antenna number and very close to traditional space-time network coding (TCSTC) scheme. Meanwhile, transmission efficiency analysis demonstrates that CSTNC scheme has higher transmission rate.

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Zhou, Xu, M. C. B. Ashley, Xiangqun Cui, Longlong Feng, Xuefei Gong, Jingyao Hu, Zhaoji Jiang et al. « Progress and Results from the Chinese Small Telescope ARray (CSTAR) ». Proceedings of the International Astronomical Union 8, S288 (août 2012) : 231–38. http://dx.doi.org/10.1017/s1743921312016936.

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AbstractIn 2008 January the 24th Chinese expedition team successfully deployed the Chinese Small Telescope ARray (CSTAR) to Dome A, the highest point on the Antarctic plateau. CSTAR consists of four 14.5cm optical telescopes, each with a different filter (g, r, i and open) and has a 4.5°×4.5° field of view (FOV). Based on the CSTAR data, initial statistics of astronomical observational site quality and light curves of variable objects were obtained. To reach higher photometric quality, we are continuing to work to overcome the effects of uneven cirrus cloud cirrus, optical “ghosts” and intra-pixel sensitivity. The snow surface stability is also tested for further astronomical observational instrument and for glaciology studies.

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Thèses sur le sujet "Cstnur"

Planchat, Jean-François. « Groupes d'automates et Cstar-algèbres ». Paris 7, 2010. http://www.theses.fr/2010PA077116.

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Cette thèse se propose d'introduire et d'étudier quelques Cstar-algèbres naturellement associées à tout sous-groupe de type fini SGS du groupe des automorphismes d'un arbre enraciné régulier. On s'intéressera particulièrement au cas où SGS est un groupe d'automate afin d'illustrer, et parfois préciser, les propriétés de ces algèbres. Deux chapitres seront consacrés à l'étude du point suivant : étant donné une de ces Cstar-algèbres, sous quelles conditions sur SGS cette dernière contient-elle la Cstar-algèbre régulière de SGS ? Nous verrons que cette question est reliée à la taille des stabilisateurs de sous-arbres ; nous étudierons ainsi ces sous-groupes dans le cas où SGS est un groupe d'automate. Par ailleurs, nous montrerons que ces algèbres permettent parfois d'obtenir des résultats sur la Cstar-algèbre régulière du groupe et sur certaines algèbres introduites par V. Nekrashevych
This PHD dissertation aims to introduce and study some Cstar-algebras naturally associated with any finitely generated subgroup SGS of the automorphism group of a regular rooted tree. We will especially be interested with the case of SGS an automata group, in order to illustrate, and sometimes specify the properties of these algebras. Two chapters will be devoted to the study of the following point: given one of these Cstar-algebras, under what conditions on the group SGS does this latter algebra contain the regular Cstar-algebra of SGS? We will see that this question is related to the size of the stabilizers of sub-trees; we will thus study these subgroups when SGS is an automata group. Besides, we will show that these algebras sometimes allow to obtain results on the regular Cstar-algebra of the group and on certain algebras introduced by V. Nekrashevych

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Tanaka, Ken. « Control of solution MMA polymerization in a CSTR ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq22260.pdf.

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Barbosa, Junior Vandoel Pedro. « Estrategias de controle de operação de reatores CSTR ». [s.n.], 1992. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267333.

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Orientador: Rubens Maciel Filho
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica
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Resumo: : O controle de processos químicos é um fator determinante para o bom desempenho de toda a planta. No entanto, o seu sucesso vai depender do desenvolvimento de estruturas de controle adequadas. Neste trabalho foram propostas e investigadas várias estruturas de controle com o objetivo de obter o controle de reatores químicos ¿off-line¿ e ¿on-line¿. Para tanto foram utilizadas técnicas de controle não convencionais. O sistema considerado é um reator tanque contínuo agitado (CSTR) não isotérmico para reações químicas do tipo A 'seta¿ B ou A 'seta¿ B 'seta¿ C (consideradas exotérmicas, irreversíveis e com cinéticas de primeira ordem), onde pretende-se maximizar o produto B. O estudo deste tipo de sistema tem relevância para muitos processos na indústria química e em processos biotecnológicos. Embora o sistema seja de parâmetros concentrados, o fato de ser multivariável e ter um modelo matemático determinístico não linear, leva-o a ter um comportamento dinâmico complexo. Um estudo dinâmico abrangente do sistema, para perturbações múltiplas nas variáveis de entrada, foi realizado. A metodologia proposta para analisar tais efeitos mostrou-se conveniente na definição de futuras políticas de controle e de operação. Feita a análise dinâmica do sistema iniciou-se os estudos de otimização através de um procedimento visando a definição de ¿set-point¿ para operação ótima do reator, estratégias e implementação de algoritmos de controle... Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital
Abstract: The control of chemical processes is a determining factor to a good performance of the whole plant. However, its success will be highly restricted to the development of suitable control structures. In this work, it was proposed and investigated several structures of control looking for obtaing suitable off-line and on-line control of chemical reactor. For that some non-conventional techiniques were used. A non-isothermic continuous stirred tank reactor (CSTR) to chemical reactions of the type A 'seta¿ B ou A 'seta¿ B 'seta¿ C (considered exothermic, irreversible with first order kinetics) was used as the system, where the control objective is to maximize product b. the study of this system is of major importance in many process is of the chemical and biotechnological industries. In spite of being a lumped parameter system, the process multivariable and nonlinear so that it has a complex dynamic behaviour. A comprehensive dynamic study for simultaneous perturbations of the inputs was carried out. The proposed methodology to analyse such effects showed out be very convenient in the definitions of control strategies and operational policies. Made the dynamic analyse of the system was began the optimization study through a procedure to define the set-point for the reactor optimum operation, strategies and implementation of control algorithm... Note: The complete abstract is available with the full electronic digital thesis or dissertations
Mestrado
Mestre em Engenharia Química

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Murphy, Terry 1955. « Residence time distribution of solid particles in a CSTR ». Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79251.

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When mixing in a tank is insufficient solid particles are known to form a concentration gradient along the height. The one-dimensional sedimentation dispersion model provides a relationship between mixing parameters and the solids concentration gradient. An investigation of the relationship between the solid mixing properties and the solids residence time distribution, as derived from the sedimentation dispersion model has been conducted. Experimental results show that the solids residence time distribution was a function of particle size and differed from that for the liquid phase. An empirical correlation for the solids Peclet number to predict the residence time distribution of the particles is proposed. A single parameter model to predict the solids residence time distribution as a function of particle size is presented. The influence of the particle concentration gradient on the mean conversion obtained in the reactor for two different cases is examined.

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Ali, Fathei M. « On the nonlinear chemical dynamics of the imperfectly mixed CSTR ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ33891.pdf.

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SANTOS, Tarcísio David KOnna Nunes. « Simulação em CFP de um reator CSTR para produção de biodíesel ». Universidade Federal de Campina Grande, 2016. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/301.

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Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-03-20T13:04:38Z No. of bitstreams: 1 TARCISIO DAVID KONNA NUNES SANTOS - DISSERTAÇÃO PPGEQ 2016..pdf: 1645201 bytes, checksum: 6f9773a951b06aacdb26ff5287e21e18 (MD5)
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Este trabalho propôs um modelo matemático para um reator do tipo CSTR (continuous stirred-tank reactor) partindo de dados experimentais da cinética da reação de transesterificação entre o óleo de soja e o acetato de metila, tendo como catalisador uma enzima, a Candida Antartica. Um volume foi proposto para reator para que o tempo médio de residência da mistura reacional fosse suficiente tal que o rendimento esperado, com base nos dados obtidos pelo Matlab®, fosse obtido na saída do reator. O estudo reacional fluidodinâmico foi feito utilizando o software comercial ANSYS® versão 15.0. Duas configurações do reator foram propostas otimização, afim de tornar o processo o mais homogêneo possível, tentando atingir as configurações do reator de mistura perfeita. Os impelidores utilizados foram o tipo pás retas inclinadas e o ripo Ribbon (Âncora), afim de avaliar qual dos impelidores consegue o rendimento satisfatório com menor potência de operação. A potência requerida foi determinada através das equações para misturadores mecânicos, sendo avaliado apenas como variável a rotação das pás.
This work proposes a mathematical model to a reactor of CSTR-type (Continuous Stirred-tank reactor) starting from experimental data of the kinetics of transesterification of soybean oil and methyl acetate, with the catalyst enzyme, Candida Antarctica. A reactor volume was proposed for the average residence time of the reaction mixture was sufficient such that the expected yield, based on data obtained by Matlab, was obtained in the reactor outlet. The reaction fluid dynamic study was done using the commercial software ANSYS® version 15.0. The optimization of the reactor was proposed by comparing the reactor operation with two impellers separately in order to make the process more homogeneous as possible, trying to achieve the perfect blend of reactor configurations. The impellers used were the type inclined straight blades and Ribbon RIPO (Anchor), to determine which of the impellers can the satisfactory performance with lower power operation. The required power was determined by the equations for mechanical mixers, being rated only as a variable rotation of the blades

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SOARES, Arianne de Freitas Barros. « Análise e avaliação entrópica de reações múltiplas consecutivas em reator CSTR ». Universidade Federal de Campina Grande, 2017. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/2022.

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Submitted by Maria Medeiros (maria.dilva1@ufcg.edu.br) on 2018-10-19T12:15:24Z No. of bitstreams: 1 ARIANNE DE FREITAS BARROS SOARES - DISSERTAÇÃO (PPGEQ) 2017.pdf: 1645096 bytes, checksum: d2c070ce1e85b955e552b026e872343c (MD5)
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O presente trabalho estende a metodologia de análise e otimização de processos químicos via minimização da taxa de produção de entropia a um sistema considerado complexo e pouco explorado pela metodologia adotada. Com o intuito de determinar as condições ótimas operacionais do processo, um sistema de reações múltiplas, genéricas e consecutivas conduzidas em um reator de mistura perfeita foi analisado. Tendo em vista que o produto intermediário é o de interesse comercial, o desenvolvimento da metodologia foi baseado nos balanços de massa e energia associados ao balanço entrópico objetivando a minimização da taxa de produção de entropia da reação de interesse. Em conformidade com estudos antecedentes, o procedimento de otimização revelou que a obtenção de uma relação entre a temperatura de alimentação e a temperatura de operação é fundamental para que a condição de mínima produção de entropia seja alcançada. Se tratando da temperatura de reação, uma única condição operacional foi considerada ótima do ponto de vista da mínima produção de entropia, maximizando o rendimento do produto desejado; enquanto que a metodologia clássica de análise e otimização sugeriu diversos pontos operacionais, incluindo um que direciona o sistema para a maximização do produto indesejado em detrimento do produto de interesse. Por se tratar de reações consecutivas, um parâmetro construtivo do reator também foi analisado para alcançar a condição de mínima entropia. A otimização entrópica do tempo de residência revelou que quanto maior for seu valor menor será a taxa de produção de entropia. Uma análise econômica de modo simplificado foi aplicada ao sistema com o intuito de se configurar um critério de seleção de tal parâmetro. Os resultados obtidos revelaram uma nova condição operacional capaz de reduzir os custos energéticos do processo e melhorar o desempenho reacional do sistema.
The present study extends the methodology of analysis and optimization of chemical process by minimizing the entropy rate production to a system considered complex and still not explored by the adopted methodology. In order to determinate the optimal operational conditions of the process, a system of multiple generic and consecutive reactions conducted in a perfect mixing reactor was analyzed. Since the intermediate product is of commercial interest, the development of the methodology was based on the mass and energy balances associated with the entropic balance aiming to minimize the entropy rate production of the reaction of interest. In accordance with previous studies, the optimization procedure revealed that obtaining a relation between inlet and operating temperatures is essential to reach the minimum entropy production condition. If treating of reaction temperature, a single operational condition was considered optimal from the point of view of minimum entropy production, while the classical analysis methodology suggested several operating points. Because it is a consecutive reaction, a constructive parameter of the reactor was also analyzed to reach the minimum entropy condition. The entropic optimization of the residence time revealed that the higher its value the lower is the entropy rate production. A simplified economic analysis was applied in order to configure a selection criterion for such parameter. The results reveals a new operating condition capable of reducing the energy costs of the process and improving the reactive performance of the system.

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Mendiburu, Díaz Henry A. « Diseño de un neurocontrolador dinámico (DBP) aplicado a un reactor químico continuo (CSTR) ». Master's thesis, Pontificia Universidad Católica del Perú, 2005. http://tesis.pucp.edu.pe/repositorio/handle/123456789/138.

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La presente tesis se compone de cuatro capítulos: en el primer capítulo se plantea los objetivos de la esta investigación y se realiza una recopilación de información referente a investigaciones relacionadas con el control y la automatización de reactores químicos CSTR. En el segundo capítulo realiza una introducción teórica sobre el reactor tanque agitado continuo, así mismo se desarrolla el modelo matemático de un reactor químico de este tipo, el cual servirá para la simulación del sistema a controlar. En el tercer capítulo se lleva a cabo el desarrollo de los criterios de diseño y parámetros de sintonización de los diversos controladores implementados para aplicarlos al reactor. En el cuarto capítulo se presentan las simulaciones del sistema sometido a la acción de control de los diversos controladores, para luego elaborar un análisis de la performance de cada uno, y finalmente establecer la superioridad del neurocontrolador dinámico frente a otros controladores.
Tesis

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Hanna, Molin. « Optimal steady-state design of bioreactors in series with Monod growth kinetics ». Thesis, Uppsala universitet, Avdelningen för systemteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-338760.

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Bioreactors are used to carry out bioprocesses and are commonly used in e.g. biogas production and wastewater treatment. Two common hydraulic models of bioreactors are the continuous stirred tank reactor (CSTR) and the plug-flow reactor (PFR). In this paper, a differential equation system that describes the substrate, biomass and inert biomass in the bioreactors is presented. It is used in a steady-state analysis and design of CSTRs in series. Monod kinetics were used to describe the specific growth rate and the decay of biomass was included. Using the derived systems of differential equations, two optimization problems were formulated and solved for both CSTRs in series and for a CSTR+PFR. The first optimization problem was to minimize the effluent substrate level given a total volume, and the second was to minimize the total volume needed to obtain a certain substrate conversion. Results show that the system of differential equations presented can be used to find optimal volume distributions that solves the optimization problems. The optimal volume for N CSTRs in series decreases as N increases, converging towards a configuration of a CSTR followed by a PFR. Analyzing how the decay rate affects the results showed that when the total volume was kept constant, increasing the decay rate caused less difference between the configurations. When the total volume was minimized, increasing the decay rate caused the configurations to diverge from each other. The presented model can be used to optimally divide reactors into smaller zones and thereby increasing the substrate conversion, something that could be of interest in e.g. existing wastewater treatment plants with restricted space. A fairly accurate approximation to the optimal design of N CSTRs in series is to use the optimal volume for the CSTR in the configuration with a CSTR+PFR and equally distribute the remaining volumes.
Bioreaktorer används för att utföra olika biologiska processer och används vanligen inom biogasproduktion eller för rening av avloppsvatten. Två vanliga hydrauliska modeller som används vid modellering av bioreaktorer är helomblandad bioreaktor (på engelska continuous stirred tank reactor, CSTR) eller pluggflödesreaktor (på engelska plug-flow reactor, PFR). I den här rapporten presenteras ett system av differentialekvationer som används för att beskriva koncentrationerna av substrat, biomassa och inert biomassa i både CSTR och PFR. Ekvationssystemet används för analys och design av en serie CSTRs vid steady-state. Tillväxten av biomassa beskrivs av Monod-kinetik. Avdödning av biomassa är inkluderat i studien. Från ekvationssystemet formulerades två optimeringsproblem som löstes för N CSTRs i serie och för CSTR+PFR. Det första optimerinsproblemet var att minimera substrathalten i utflödet givet en total volym. I det andra minimerades den totala volymen som krävs för att nå en viss substrathalt i utflödet. Resultaten visade att ekvationssystemet kan användas för att hitta den optimala volymsfördelningen som löser optimeringsproblemen. Den optimala volymen för N CSTRs i serie minskade när antalet CSTRs ökade. När N ökade konvergerade resultaten mot de för en CSTR sammankopplad med en PFR. En analys av hur avdödningshastigheten påverkade resultaten visade att en ökad avdödningshastighet gav mindre skillnad mellan de två olika konfigurationerna när den totala volymen hölls konstant. När den totala volymen istället minimerades ledde en ökad avdödningshastighet till att de två konfigurationerna divergerade från varandra. Modellen som presenteras i studien kan användas för att fördela en total reaktorvolym i mindre zoner på ett optimalt sätt och på så vis öka substratomvandlingen, något som kan vara av intresse i exempelvis befintliga avloppsreningsverk där utrymmet är begränsat. En relativt bra approximation till den optimala designen av N CSTRs i serie är att optimera volymerna för en CSTR+PFR, använda volymen för CSTR som första volym i konfigurationen med N CSTR i serie, och sedan fördela den kvarvarande volymen lika mellan de övriga zonerna.

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Basu, Nandini. « Nonlinear chemical phenomena in a continuously stirred tank reactor (CSTR) containing chlorine dioxide and sulfite / ». free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1426045.

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Livres sur le sujet "Cstnur"

Tyagi, Rajesh. Control of pH in a continuous stirred tank reactor (CSTR). Ottawa : National Library of Canada = Bibliothèque nationale du Canada, 1993.

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Edwards, J. B. Use of the Riccati equation on-line for adaptively controlling a CSTR chemical reactor. Sheffield : University of Sheffield, Dept. of Automatic Control and Systems Engineering, 1995.

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OAU/STRC, Inter-African Symposium on New Renewable and Solar Energies (3rd 1997 Pretoria South Africa). Third OAU/STRC Inter₋African Symposium on New, Renewable and Solar Energies : Troisieme Symposium Inter₋African OAU/CSTR sur les energies nouvelles, renouvelables et solaires. Pretoria : Dept. of Minerals and Energy, 1999.

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Collymore, Christa. Gratitude Journal by CStar. Independently Published, 2021.

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Ali, Fathei M. On the nonlinear chemical dynamics of the imperfectly mixed CSTR. 1998.

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CSTAR Technical Symposium : The University of Tennessee-Calspan, Center for Space Transportation and Applied Research : the Fifth Annual Technical Symposium, November 10, 1993 at the University of Tennessee Space Institute, Tullahoma, Tennessee. Tullahoma, TN : CSTAR, 1993.

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Chapitres de livres sur le sujet "Cstnur"

Gehrke, Manfred, et Otto Schmidbauer. « German-Japanese Speech Translation in CSTAR ». Dans Grundlagen und Anwendungen der Künstlichen Intelligenz, 338–49. Berlin, Heidelberg : Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-78545-0_32.

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Martinez-Guerra, Rafael, et Juan Luis Mata-Machuca. « Fault Detection in CSTR Using Nonlinear Observers ». Dans Understanding Complex Systems, 21–32. Cham : Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-03047-0_2.

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Kiew, Lau Lee, Samsul Ariffin Abdul Karim et Muhammad Izzatullah. « Physics-Constrained Deep Learning for Isothermal CSTR ». Dans Studies in Systems, Decision and Control, 13–23. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-04028-3_2.

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Manimozhi, M., et R. Meenakshi. « Multiloop IMC-Based PID Controller for CSTR Process ». Dans Proceedings of the International Conference on Soft Computing Systems, 615–25. New Delhi : Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2671-0_59.

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Taylor, T. W., et W. Geiseler. « Periodic Perturbation of Limit Cycles in an Isothermal CSTR ». Dans Temporal Order, 122–25. Berlin, Heidelberg : Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70332-4_17.

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Bar-Eli, K. « Oscillations in a CSTR Affected by the Pump Periodicity ». Dans Temporal Order, 126–27. Berlin, Heidelberg : Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70332-4_18.

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Vojtesek, Jiri, et Petr Dostál. « Control of Concentration inside CSTR Using Nonlinear Adaptive Controller ». Dans Nostradamus 2014 : Prediction, Modeling and Analysis of Complex Systems, 195–204. Cham : Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07401-6_19.

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Kroiss, Helmut, et Karl Svardal. « CSTR Reactors and Contact Processes in Industrial Wastewater Treatment ». Dans Biotechnology, 479–91. Weinheim, Germany : Wiley-VCH Verlag GmbH, 2008. http://dx.doi.org/10.1002/9783527620944.ch23.

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Murugan, B., R. Vinodha et B. Shoba. « Fuzzy Cluster based PID Controller for a CSTR Process ». Dans Lecture Notes in Electrical Engineering, 283–93. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0336-5_23.

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Ranjan, Ankita, et Sarbani Chakraborty. « Phase Portrait Analysis of Continuous Stirred Tank Reactor (CSTR) ». Dans Nanoelectronics, Circuits and Communication Systems, 177–92. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7486-3_18.

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Actes de conférences sur le sujet "Cstnur"

Liu, Jiawei, Zheng-Jun Zha, Xierong Zhu et Na Jiang. « Co-Saliency Spatio-Temporal Interaction Network for Person Re-Identification in Videos ». Dans Twenty-Ninth International Joint Conference on Artificial Intelligence and Seventeenth Pacific Rim International Conference on Artificial Intelligence {IJCAI-PRICAI-20}. California : International Joint Conferences on Artificial Intelligence Organization, 2020. http://dx.doi.org/10.24963/ijcai.2020/141.

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Person re-identification aims at identifying a certain pedestrian across non-overlapping camera networks. Video-based person re-identification approaches have gained significant attention recently, expanding image-based approaches by learning features from multiple frames. In this work, we propose a novel Co-Saliency Spatio-Temporal Interaction Network (CSTNet) for person re-identification in videos. It captures the common salient foreground regions among video frames and explores the spatial-temporal long-range context interdependency from such regions, towards learning discriminative pedestrian representation. Specifically, multiple co-saliency learning modules within CSTNet are designed to utilize the correlated information across video frames to extract the salient features from the task-relevant regions and suppress background interference. Moreover, multiple spatial-temporal interaction modules within CSTNet are proposed, which exploit the spatial and temporal long-range context interdependencies on such features and spatial-temporal information correlation, to enhance feature representation. Extensive experiments on two benchmarks have demonstrated the effectiveness of the proposed method.

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Hunsberger, Luke, et Roberto Posenato. « Simpler and Faster Algorithm for Checking the Dynamic Consistency of Conditional Simple Temporal Networks ». Dans Twenty-Seventh International Joint Conference on Artificial Intelligence {IJCAI-18}. California : International Joint Conferences on Artificial Intelligence Organization, 2018. http://dx.doi.org/10.24963/ijcai.2018/184.

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Recent work on Conditional Simple Temporal Networks (CSTNs) has focused on checking the dynamic consistency (DC) property assuming that execution strategies can react instantaneously to observations. Three alternative semantics---IR-DC, 0-DC, and π-DC---have been presented. The most practical DC-checking algorithm for CSTNs has only been analyzed with respect to the IR-DC semantics, while the 0-DC semantics was shown to have a serious flaw that the π-DC semantics fixed. Whether the IR-DC semantics had the same flaw and, if so, what the consequences would be for the DC-checking algorithm remained open questions. This paper (1) shows that the IR-DC semantics is also flawed; (2) shows that one of the constraint-propagation rules from the IR-DC-checking algorithm is not sound with respect to the IR-DC semantics; (3) presents a simpler algorithm, called the π-DC-checking algorithm; (4) proves that it is sound and complete with respect to the π-DC semantics; and (5) empirically evaluates the new algorithm.

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Yang, Xin, Ying Wang, Haishun Chen et Jie Li. « CSTNET : Enhancing Global-To-Local Interactions for Image Captioning ». Dans 2022 IEEE International Conference on Image Processing (ICIP). IEEE, 2022. http://dx.doi.org/10.1109/icip46576.2022.9897810.

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Prokop, Roman, Radek Matusu et Jiri Vojtesek. « A Robust And Adaptive Approach To Control Of A Continuous Stirred Tank Reactor With Jacket Cooling ». Dans 35th ECMS International Conference on Modelling and Simulation. ECMS, 2021. http://dx.doi.org/10.7148/2021-0185.

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Continuous Stirred Tank Reactors (CSTR) are one of the main technological plants used in chemical and biochemical industry. These systems are quite complex with many nonlinearities and the conventional linear control with fixed parameters can be questionable or sometimes unacceptable. The solution should be found in so-called “non-traditional” control approaches like adaptive, robust, fuzzy, or artificial intelligent methods. One way is the utilization of self-tuning adaptive schemes, but computations may be quite difficult, clumsy and time-consuming. This paper brings an alternative principle called a robust approach and the comparison of the robust and adaptive control responses. Robust control considers a CSTR model as a linear system with parametric uncertainty, which covers a family of all feasible plants. Then several controllers with fix parameters are designed so that for all possible plants, the acceptable control behavior is obtained. The two-degree-of-freedom (2DOF) structure for the control law was chosen. Both robust and adaptive control is applied to an original nonlinear model of a CSTR. All calculations and simulations of mathematical models and control responses were performed in the Matlab and Simulink environment.

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Zhang, Hong-fei, Jian-min Wang, Yi Zhang, Yi Feng, Cheng Chen, Qi-jie Tang, Dong-xu Yang, Guang-yu Zhang et Jian Wang. « Scientific CCD camera for CSTAR telescope in Antarctica ». Dans High Energy, Optical, and Infrared Detectors for Astronomy VIII, sous la direction de Andrew D. Holland et James Beletic. SPIE, 2018. http://dx.doi.org/10.1117/12.2309892.

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Sun, Qingxiao, Yi Liu, Hailong Yang, Zhonghui Jiang, Xiaoyan Liu, Ming Dun, Zhongzhi Luan et Depei Qian. « csTuner : Scalable Auto-tuning Framework for Complex Stencil Computation on GPUs ». Dans 2021 IEEE International Conference on Cluster Computing (CLUSTER). IEEE, 2021. http://dx.doi.org/10.1109/cluster48925.2021.00037.

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Yuan, Xiangyan, Xiangqun Cui, Genrong Liu, Fengxiang Zhai, Xuefei Gong, Ru Zhang, Lirong Xia et al. « Chinese Small Telescope ARray (CSTAR) for Antarctic Dome A ». Dans SPIE Astronomical Telescopes + Instrumentation, sous la direction de Larry M. Stepp et Roberto Gilmozzi. SPIE, 2008. http://dx.doi.org/10.1117/12.788748.

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Utkin, Victor A., et Svetlana I. Gulyukina. « Block approach for CSTR Control ». Dans 2020 International Russian Automation Conference (RusAutoCon). IEEE, 2020. http://dx.doi.org/10.1109/rusautocon49822.2020.9208071.

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Wang, Zaiying, Ye Zhang et Dong Li. « Temperature Optimization Control of CSTR ». Dans 2020 IEEE International Conference on Information Technology,Big Data and Artificial Intelligence (ICIBA). IEEE, 2020. http://dx.doi.org/10.1109/iciba50161.2020.9276793.

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Hazerchi, Mohamed, et Rachid Illoul. « Tracking PDC controller for CSTR ». Dans 2015 3rd International Conference on Control, Engineering & Information Technology (CEIT). IEEE, 2015. http://dx.doi.org/10.1109/ceit.2015.7233084.

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Rapports d'organisations sur le sujet "Cstnur"

Lee, D. D. Test Results for CSTR Test 4. Office of Scientific and Technical Information (OSTI), mai 2001. http://dx.doi.org/10.2172/786329.

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Lee, D. D. Test Results for CSTR Test 3. Office of Scientific and Technical Information (OSTI), octobre 2000. http://dx.doi.org/10.2172/814058.

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Liu, D. D. S., et D. J. Patmore. Comparison of pitch conversions from experiments using CSTR and tubular reactors in the CANMET hydrocracking process. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/302572.

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Liu, D. D. S., D. J. Patmore, J. S. H. Tscheng et A. K. Jain. Upgrading of heavy oil and residuum by the CANMET hydrocracking process : comparison of pitch conversion from experiments using CSTR and tubular reactors. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/302591.

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Rittman, Martyn, Xiaoli Chen, Chieh-Chih Estelle Cheng, Lulu Jiang et Jia Liu. Better Together : Facilitating FAIR Research Output Sharing (APAC time zones). Chair Ran Dang. Crossref, septembre 2022. http://dx.doi.org/10.13003/yzmm3339.

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Unique and persistent identifiers for researchers, institutes, and different types of research outputs, alongside comprehensive metadata, facilitates Findable, Accessible, Interoperable, and Reusable (FAIR) research. In the second webinar of the Better Together series hosted by Crossref, DataCite, and ORCID, we welcomed a guest co-organizer CSTR (Common Science and Technology Resource Identifier) to jointly present a session focused on the sharing of scholarly resources, leveraging both the global and local identifier infrastructure and services. We go into detail about how repositories can leverage open scholarly infrastructure to help researchers share more, cite more, and generate impact. Part of this webinar focuses on some use cases in the Mandarin-speaking community. However, the presentation is be conducted in English with slides in both English and Mandarin. In this webinar we covered the following topics: Who we are Besides papers, what other resources can be shared? What’s the difference between “sharing” and “publishing”? How our organizations work together to make different types of scholarly resources Findable, Accessible, Interoperable and Reusable Science Data Bank and how it integrates with identifiers in their workflow This webinar took place on 19 September 2022 at 6am UTC/ 14:00 Beijing. This webinar lasts 90 minutes including time for Q&A. 研究者、科研机构、和科研成果都能利用独特永久识别符(PID)及其背后丰富详尽的元数据,实现可查询、可获取、可互操作、可复用的FAIR科研数据原则。此次Crossref, DataCite, ORCID和通用科技资源标识符CSTR合办的线上宣讲会,将着重讨论机构存储库利用国际国内开放标识符基础设施,帮助研究者分享、引用不同类型研究成果,产生影响力。本次宣讲会以英文进行,幻灯片内容将以中英双语呈现。时间 2022年9月19日 06:00 上午世界标准时间UTC

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