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Journal articles on the topic 'Diagrama de Cobweb'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Upton, Graham J. G. "Cobweb Diagrams for Multiway Contingency Tables." Journal of the Royal Statistical Society: Series D (The Statistician) 49, no. 1 (2000): 79–85. http://dx.doi.org/10.1111/1467-9884.00221.

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2

Moore, F., K. M. Ribeiro, E. R. Almendra, and T. Ogasawara. "Análise termodinâmica visando estabelecer as condições ideais de síntese da ferrita de cobre a partir de solução aquosa a baixa pressão." Cerâmica 45, no. 295 (1999): 137–39. http://dx.doi.org/10.1590/s0366-69131999000500005.

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A literatura assinala que a ferrita de cobre é uma das ferritas possíveis de obtenção a partir da solução aquosa a baixa pressão, isto é, um precipitado misto de hidróxidos de ferro e de cobre submetido a um tratamento de cristalização em temperaturas e pressões ordinárias (inferior a 100 <FONT FACE="Symbol">°</font> C e aproximadamente 1 atm de pressão) resultará em ferrita de cobre cristalina. Utilizando o Programa de Aplicativos HSC Chemistry for Windows 3.0, foram construídos diagramas <FONT FACE="Symbol">e</font>H-pH para grande número de atividades de Cu e Fe na s

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3

Mohd Roslan, Ummu Atiqah. "Sensitive Dependence on Initial Conditions for an Example of Markov Map: Skewed Doubling Map." MATEMATIKA 34, no. 1 (2018): 13–21. http://dx.doi.org/10.11113/matematika.v34.n1.1002.

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Markov map is one example of interval maps where it is a piecewise ex-panding map and obeys the Markov property. One well-known example of Markov map is the doubling map, a map which has two subintervals with equal partitions. In this paper, we are interested to investigate another type of Markov map, the so-called skewed doubling map. This map is a more generalized map than the doubling map. Thus, the aims of this paper are to nd the xed points as well as the periodic points for the skewed doubling map and to investigate the sensitive dependence on initial conditions of this map. The method c

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4

GÓMEZ, MANUEL A. "DYNAMICS OF THE SAVING RATE IN THE NEOCLASSICAL GROWTH MODEL WITH CES PRODUCTION." Macroeconomic Dynamics 12, no. 2 (2008): 195–210. http://dx.doi.org/10.1017/s1365100507060464.

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This paper characterizes the global dynamics of the saving rate in the neoclassical growth model with CES production. The study is based on qualitative phase-diagram analysis. The analytical conditions characterizing the cases that may arise theoretically depending on the parameters' configuration are obtained. It is well known that the saving rate behaves monotonically if technology is Cobb-Douglas. However, when the elasticity of substitution is nonunitary, the saving rate path may exhibit nonmonotonic behavior.

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5

Flores, Jesús, Angel Bustamante, Juan Feijoo, J. C. González, Dalbert Sánchez, and Geraldo R. C. Cernicchiaro. "Correlación entre la superconductividad y la estructura en el sistema [Y1−xPrx]Ba2Cu3O7." Revista de Investigación de Física 14, no. 02 (2011): 1–7. http://dx.doi.org/10.15381/rif.v14i02.8698.

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Un estudio estructural de la incorporación de iones de Pr en los sítios de Y fue realizado en muestras policristalinas de [Y1−xPrx]Ba2Cu3O7 a través de: análisis de Rietveld de los patrones de difracción de rayos X, el método de enlaces de valencia y los diagramas de densidad electrónica correlacionando sus efectos del dopaje en las propiedades superconductantes. El contenido de oxígeno fue chequeado por medio de espestroscopia μ-Raman, observando la posición de la frecuencia del modo de fonón de O4-Ag y estableciendo una relación entre el modo de frecuencia del O4-Ag y los dos sítios del cobr

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6

Oré Vidalón, Salvador. "Evaluación de la saturación y sedimentación en la precipitación selectiva del drenaje ácido de mina." Prospectiva Universitaria 9, no. 1 (2017): 64. http://dx.doi.org/10.26490/uncp.1990-7044.2012.1.294.

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En el presente trabajo de investigación, se realizó la evaluación de la saturación y sedimentación en la precipitación selectiva del drenaje ácido de mina, Los metales pesados fueron el cobre, zinc, manganeso, hierro y aluminio, la precipitación se realizó mediante la adición de óxido de calcio, estableciéndose un rango adecuado de los pH en base al diagrama de precipitación. Para la evaluación de la sedimentación se realizaron las pruebas en forma discontinua, con la finalidad de establecer los parámetros necesarios para el dimensionamiento de un sedimentador continuo. La precipitación select

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7

Qi, Xiaowei, Yiyong Yang, Xiangyu Wang, and Zaobei Zhu. "Analysis and optimization of the gear-shifting process for automated manual transmissions in electric vehicles." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 231, no. 13 (2017): 1751–65. http://dx.doi.org/10.1177/0954407016685461.

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In recent years, it has been a trend for an automated manual transmission to be adopted as the powertrain for an electric vehicle. However, the strong degrees of jerk and power interruption during the gear-shifting process affect the shifting quality and restrict the application of automated manual transmissions. Therefore, it is a currently popular research topic to find an optimal method to improve the shifting qualities of automated manual transmissions. In this paper, the clutchless shifting process is analysed on the basis of a dynamics model of an automated manual transmission in an elec

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8

Araujo, Luis, Yasuana Britto, Keyla Meza, and J. Olivella. "Caracterización y clasificación geomecánica del depósito de cobre localizado en el corregimiento de Camperucho, municipio de Valledupar, Cesar." Revista Agunkuyâa 7, no. 1 (2017): 26–35. http://dx.doi.org/10.33132/27114260.1210.

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En las obras mineras, principalmente en aquellas a cielo abierto se realizan numerosas excavaciones que requieren el diseño y control de los taludes abiertos, para este control se requiere explicar el comportamiento geomecánico del terreno, al igual que conocer las características de resistencia de este, para luego poder implementar los equipos necesarios para la seguridad y el rendimiento de la extracción. Este artículo presenta el estudio de las propiedades físicas y mecánicas del depósito de cobre perteneciente a la formación Guatapuri (Tgr), localizado en la vereda Camperucho, corregimient

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9

López-Plaza, M., A. Esparza Arroyo, I. García Gómez, and F. J. López-Moro. "Procedencia del material pétreo de los molinos de los yacimientos Cogotas I (Bronce Medio y Tardío) de la Cuenca del Duero y modelos consecuentes de flujo." Estudios Geológicos 74, no. 1 (2018): 074. http://dx.doi.org/10.3989/egeol.42955.462.

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Se ha estudiado la procedencia del material pétreo de doce molinos de diferentes yacimientos cogotenses de la Cuenca del Duero. Utilizando una marcha metodológica previa, se alcanza una caracterización petrográfica, mineralógica y geoquímica del material, incluyendo el tratamiento de elementos traza mediante diagramas de normalización y comparación con datos disponibles de áreas fuente potenciales. Esto ha permitido, en muchos casos, la identificación de áreas fuente locales ya que la signatura geoquímica representa una huella arqueológica fidedigna de las facies o subtipos de rocas implicadas

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10

Sandor, Leonardo Taborda, and Itamar Ferreira. "Uma Metodologia para a avaliação dos gradientes de tenacidade à fratura ao longo da camada cementada do aço SAE 5115." Matéria (Rio de Janeiro) 11, no. 2 (2006): 111–24. http://dx.doi.org/10.1590/s1517-70762006000200005.

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Este trabalho propõe um modelo para avaliar pontualmente as variações de tenacidade à fratura ao longo da camada cementada de um aço SAE 5115. A pequena espessura dessas camadas impede a retirada de corpos de prova nas dimensões especificadas pelas normas de ensaios de tenacidade à fratura. Assim, para simular uma camada cementada retirou-se corpos-de-prova de tração e de tenacidade à fratura de amostras de aços SAE 5115, 5140, 5160 e 52100 assumindo a influência local apenas da variação do teor de carbono e considerando que os teores dos demais elementos de liga são essencialmente constantes.

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11

Teja-Ruiz, A. M. Teja-Ruiz, J. C. J.C. Juárez-Tapia, K. K. Flores-Castro, et al. "Identificación de sulfuros de arsénico complejos contenidos en una muestra mineral de Fresnillo, Zacatecas y propuesta de disolución de semimetales." Tópicos de Investigación en Ciencias de la Tierra y Materiales 6, no. 6 (2019): 23–32. http://dx.doi.org/10.29057/aactm.v6i6.4991.

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En la industria minera, los concentrados de cobre, plomo y zinc son comúnmente castigados de manera comercial por su alto contenido de arsénico. En busca de combatir esta problemática, se caracterizó un mineral proveniente de Fresnillo, Zacatecas, con importantes concentraciones de este metal tóxico a fin de someterlo a un baño alcalino y lograr la separación del arsénico del resto del mineral. El análisis químico realizado a la muestra del mineral mediante la técnica de Espectroscopia de Emisión de Plasma Acoplada por Inducción (ICP) y Fluorescencia de Rayos X (FRX) identificó un alto conteni

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12

Kumar, Vishal, and Evelyn Ai Lin Evelyn Teo. "Exploring the application of property graph model in visualizing COBie data." Journal of Facilities Management ahead-of-print, ahead-of-print (2021). http://dx.doi.org/10.1108/jfm-09-2020-0066.

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Purpose The usability aspect of the construction operations building information exchange (COBie) datasheet has been largely overlooked. Users find it difficult to find relevant data inside COBie and understand the dependencies of information. This research study is a part of a more comprehensive research study to identify the usability issues associated with COBie and propose solutions to deal with them. This paper aims to discuss the challenges associated with the visualization aspect of COBie and proposes a solution to mitigate them. Design/methodology/approach This paper is based on design

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13

"A Set of Economic and Mathematical Models for Assessment of Agricultural Crop Cultivation Technologies." International Journal of Recent Technology and Engineering 8, no. 2 (2019): 3829–33. http://dx.doi.org/10.35940/ijrte.b2464.078219.

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Research objectives. The paper describes the process of development of a set of mathematical models for assessment of agricultural production technologies to be used as the basis of a software complex module for managing technological processes in crop farming. The reported study was funded by RFBR according to the research project № 18-37-00148. Methods. Given the specifics of management in agriculture, it is worth noting that the lack of objective information across the production cycle in crop farming and the subsequent misalignment with an optimum technology results in overshooting labour

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14

Bock, Clive H., Kuo-Szu Chiang, and Emerson M. Del Ponte. "Plant disease severity estimated visually: a century of research, best practices, and opportunities for improving methods and practices to maximize accuracy." Tropical Plant Pathology, June 22, 2021. http://dx.doi.org/10.1007/s40858-021-00439-z.

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AbstractPlant disease quantification, mainly the intensity of disease symptoms on individual units (severity), is the basis for a plethora of research and applied purposes in plant pathology and related disciplines. These include evaluating treatment effect, monitoring epidemics, understanding yield loss, and phenotyping for host resistance. Although sensor technology has been available to measure disease severity using the visible spectrum or other spectral range imaging, it is visual sensing and perception that still dominates, especially in field research. Awareness of the importance of acc

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15

Garzón García, Guillermo, Juan Guillermo Morales, and Luis Alfredo Lopez. "Evaluación del grado de verdor de la Síntesis del Complejo CuCl2(DMSO)2 a Escala Micro Empleando la Métrica Escala Verde." BISTUA REVISTA DE LA FACULTAD DE CIENCIAS BASICAS 16, no. 2 (2018). http://dx.doi.org/10.24054/01204211.v2.n2.2017.2878.

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Los objetivos básicos de la Química Verde se fundamentan en los 12 pricipios formulados por Anastas. En diversos trabajos de investigación se sostiene que las reacciones y los procesos estudiados son verdes, sin demostrar qué tanto cumplen con los planteamientos de la Química Verde. Por ello, con el fin de contribuir a un cambio cultural y educativo que acerque la química a la búsqueda diaria de la sostenibilidad, en esta investigación se emplea una métrica conocida como Escala Verde, de acuerdo a la metodología sugerida por el profesor René Miranda. Esta métrica sirve para analizar de forma c

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16

Su, Qihang. "Percutaneous Vertebroplasty Versus Kyphoplasty for Thoracolumbar Osteoporotic Vertebral Compression Fractures in Patients with Distant Lumbosacral Pain." Pain Physician, May 1, 2021, E349—E356. http://dx.doi.org/10.36076/ppj.2021/24/e349.

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Background: In clinical practice, we have found that the pain caused by thoracolumbar osteoporotic vertebral compression fracture (OVCF) is sometimes not limited to the level of the fractured vertebrae but instead occurs in areas far away from the injured vertebrae, such as the lower back, area surrounding the iliac crest, or buttocks, and this type of pain is known as distant lumbosacral pain. The pathogenesis of pain in distant regions caused by thoracolumbar OVCF remains unclear. Objectives: To compare the clinical efficacy and imaging outcomes of percutaneous vertebroplasty (PVP) and percu

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