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Ara es mostren els items 44897-44916 de 245820

    • Compositional classes and diversity in archaeological ceramic studies 

      Buxeda i Garrigós, J. (CIMNE, 2011)
      Text en actes de congrés
      Accés obert
      Archaeological studies are based, at a large extent, on the study of the materials that form the different unearthed assemblages. Thus, ceramic assemblages are defined by their compositions, i.e. how many pots of different ...

    • Compositional combination and selection of forecasters 

      Martín Arroyo, Antonio; de Juan Fernández, Aránzazu (Institut d'Estadística de Catalunya, 2022-12-19)
      Article
      Accés obert
      The Split-Then-Combine approach has previously been used to generate the weights of forecasts in a combination in the Euclidean space. This paper extends this approach to combine forecasts inside the simplex space, the ...

    • Compositional data analysis : An innovative framework for analyzing asset allocation and portfolio performance 

      Prous I Conde, Joan (Universitat Politècnica de Catalunya, 2023-07-06)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Stock market sectors and financial ratios are extensively studied by banks and financial institutions worldwide. However, when these types of data are expressed as percentages, they present mathematical and statistical ...

    • Compositional data analysis approach in the measurement of social-spatial segregation: towards a sustainable and inclusive city 

      Cruz Sandoval, Marco Antonio; Roca Bosch, Elisabet; Ortego Martínez, María Isabel (2020-05-24)
      Article
      Accés obert
      The location and context in which people live influences and conditions their opportunities in life. This becomes relevant in a world subject to rapid urban and demographic growth, in which different economic, social, and ...

    • Compositional data analysis as a potential tool to study the (paleo)ecology of calcareous nannoplankton from the central portuguese submarine canyons (W off Portugal) 

      Guerreiro, C.; Cachão, M.; Stigter, De; Oliveira, H.; Rodrigues, A. (CIMNE, 2011)
      Text en actes de congrés
      Accés obert
      Submarine canyons are deep and steep incisions on the continental margins. The physical forcing mechanisms linked with these marine systems, such as the enhancement of upwelling and bottom sediment resuspension, are ...

    • Compositional data analysis with Red-R 

      Parent, Serge-Etienne; Covington, Kyle R. (CIMNE, 2011)
      Text en actes de congrés
      Accés obert
      The compositional analyst must use a series of software to transform raw compositional data and run statistical analyses on them. Tools for compositional data analysis are available in R, an open source widely-used ...

    • Compositional data for global monitoring: the case of drinking water and sanitation 

      Pérez Foguet, Agustí; Giné Garriga, Ricard; Ortego Martínez, María Isabel (2017-07)
      Article
      Accés obert
      Introduction At a global level, access to safe drinking water and sanitation has been monitored by the Joint Monitoring Programme (JMP) of WHO and UNICEF. The methods employed are based on analysis of data from household ...

    • Compositional data techniques for the analysis of the container traffic share in a multi-port region 

      Grifoll Colls, Manel; Ortego Martínez, María Isabel; Egozcue Rubí, Juan José (Springer, 2019-12)
      Article
      Accés obert
      The statistical techniques based on compositional data are applied to investigate the evolution of the traffic share of the container throughput in a multi-port system. Compositional vectors are those which contain relative ...

    • Compositional data, bayesian inference and the modeling process 

      Bacon-Shone, J. (CIMNE, 2011)
      Text en actes de congrés
      Accés obert
      Statistical modeling in practice encompasses both the exploratory process, which is an inductive scientific approach and the confirmatory modeling process, which uses the deductive scientific approach. This paper will ...

    • Compositional formulation for multi phase flow reactive transport in porous media: an approach that simplifies coupling between phenomena 

      Gamazo Rusnac, Pablo Andres; Saaltink, Maarten Willem; Carrera Ramírez, Jesús (Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2010)
      Text en actes de congrés
      Accés obert
      In this work we discuss coupling difficulties that arises when solving phase and species conservation equations. We present a compositional formulation that avoids these difficulties, and allows solving multiphase reactive ...

    • Compositional influence on the electrical performance of zinc indium tin oxide transparent thin-film transistors 

      Marsal Vinade, Albert; Carreras Seguí, Paz; Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal; Galindo Lorente, Sergi; Alcubilla González, Ramón; Bertomeu Balaguero, Joan; Antony, Aldrin (2014-03-31)
      Article
      Accés restringit per política de l'editorial
      In this work, zinc indium tin oxide layers with different compositions are used as the active layer of thin film transistors. This multicomponent transparent conductive oxide is gaining great interest due to its reduced ...

    • Compositional loess modeling 

      Bergman, J.; Holmquist, B. (CIMNE, 2011)
      Text en actes de congrés
      Accés obert
      Cleveland (1979) is usually credited with the introduction of the locally weighted regression, Loess. The concept was further developed by Cleveland and Devlin (1988). The general idea is that for an arbitrary number of ...

    • Compositional meta-analysis of citrus varieties in the state of São Paulo, Brazil 

      Rozane, Danilo Eduardo; De Mattos Junior, Dirceu; Parent, Serge-Etienne; Natale, William; Parent, Leon Etienne (CIMNE, 2011)
      Text en actes de congrés
      Accés obert
      Brazil is the largest orange (Citrus sinensis) producer worldwide. The nutrient management of orange orchards is designed from experiments on a limited number of varieties. This knowledge is transferred to other varieties ...

    • Compositional meta-analysis of the nutrient profile of potato cultivars 

      Hernandes, Amanda; Parent, Serge-Etienne; Veillette, Jean-Pierre; Parent, Philippe; Leblanc, Michaël; Roy, Guy; Sylvestre, Philippe; Samson, Nicolas; Natale, William; Parent, Leon Etienne (CIMNE, 2011)
      Text en actes de congrés
      Accés obert
      While several potato (Solanum tuberosum L.) cultivars of different maturity groups (e.g. early, mid-season, late) are being selected each year as a result of successful breeding for disease resistance and market requirements, ...

    • Compositional random data: a routine for CoDaPack 

      Comas Cufí, Marc; Mateu Figueras, G.; Thió Fernández de Henestrosa, Santiago (CIMNE, 2011)
      Text en actes de congrés
      Accés obert
      Generation of random variables are needed in the simulations of many natural process. For some random variables, di erent methodologies are known, specially into euclidean spaces. In this paper a routine for dealing with ...

    • Compositional safety verification with Max-SMT 

      Brockschmidt, Marc; Larraz Hurtado, Daniel; Oliveras Llunell, Albert; Rodríguez Carbonell, Enric; Rubio Gimeno, Alberto (2015)
      Text en actes de congrés
      Accés obert
      We present an automated compositional program verification technique for safety properties based on conditional inductive invariants. For a given program part (e.g., a single loop) and a postcondition, we show how to, using ...

    • Compositional spatio-temporal PM2.5 modelling in wildfires 

      Sánchez Balseca, Joseph; Pérez Foguet, Agustí (2021-10)
      Article
      Accés obert
      Wildfires are natural ecological processes that generate high levels of fine particulate matter (PM2.5) that are dispersed into the atmosphere. PM2.5 could be a potential health problem due to its size. Having adequate ...

    • Compositionally tuned Ni x Sn alloys as anode materials for lithium-ion and sodium-ion batteries with a high pseudocapacitive contribution 

      Li, Junshan; Xu, Xijun; Luo, Zhishan; Zhang, Chaoqi; Yu, Xiaoting; Zuo, Yong; Albiol, Jordi; Llorca Piqué, Jordi; Cabot, Andreu (2019-05-01)
      Article
      Accés obert
      Nickel tin alloy nanoparticles (NPs) with tuned composition NixSn (0.6¿=¿x¿=¿1.9) were synthesized by a solution-based procedure and used as anode materials for Li-ion batteries (LIBs) and Na-ion batteries (SIBs). Among ...

    • Compositionally-tailored steel-based materials manufactured by electron beam melting using blended pre-alloyed powders 

      Koptyug, Andrey; Popov Jr., Vladimir V.; Botero Vega, Carlos Alberto; Jiménez Piqué, Emilio (2020-01-13)
      Article
      Accés obert
      The paper presents the prospects of additive manufacturing (AM) in metal, using the powder bed fusion (PBF) method Electron Beam Melting (EBM) in fabrication specific steel-based alloys for different applications. The ...

    • Compositions and fuzzy compositions in decision-making models 

      Talasova, J.; Pavlacka, O. (CIMNE, 2011)
      Text en actes de congrés
      Accés obert
      In decision-making models, the compositions (Aitchison, 1986) are employed in various forms. They can represent the normalized weights of criteria in multiple-criteria decision-making models, or the probabilities of ...