Exploració per tema "Statistical analysis"

Ara es mostren els items 25-44 de 64

    • Generalized equipartition theorem and confining walls 

      Rey Oriol, Rosendo (2015-06)
      Article
      Accés obert
      It is shown that the generalized equipartition theorem as applied to the momentum may fail, even though the usual conditions of validity are met. This failure is linked to the nature of the confining walls, with ideal walls ...

    • Human metastatic cholangiocarcinoma patient-derived xenografts and tumoroids for preclinical drug evaluation 

      Serra Camprubí, Queralt; Verdaguer, Helena; Oliveros, Winona; Lupión Garcia, Núria; Llop Guevara, Alba; Melé, Marta (American Association for Cancer Research, 2023)
      Article
      Accés obert
      Cholangiocarcinoma (CCA) is usually diagnosed at advanced stages, with limited therapeutic options. Preclinical models focused on unresectable metastatic CCA are necessary to develop rational treatments. Pathogenic mutations ...

    • Identification of circulating microRNA profiles associated with pulmonary function and radiologic features in survivors of SARS-CoV-2-induced ARDS 

      García Hidalgo, María C.; González, Jessica; Benítez, Iván D.; Carmona, Paola; Santisteve, Sally; Garcia Gasulla, Dario (Taylor & Francis Open Access, 2022)
      Article
      Accés obert
      ABSTRACT There is a limited understanding of the pathophysiology of postacute pulmonary sequelae in severe COVID-19. The aim of current study was to define the circulating microRNA (miRNA) profiles associated with pulmonary ...

    • Identifying hidden Zika hotspots in Pernambuco, Brazil: a spatial analysis 

      Picinini Freitas, Laís; Lowe, Rachel; Koepp, Andrew E; Valongueiro Alves, Sandra; Dondero, Molly; Marteleto, Letícia J (Oxford University Press, 2023)
      Article
      Accés obert
      Northeast Brazil has the world's highest rate of Zika-related microcephaly. However, Zika case counts cannot accurately describe burden because mandatory reporting was only established when the epidemic was declining in ...

    • Image restoration using HOS and the Radon transform 

      Sayrol Clols, Elisa; Nikias, C L; Gasull Llampallas, Antoni (IEEE IEEE PRESS, 1993)
      Text en actes de congrés
      Accés obert
      The authors propose the use of higher-order statistics (HOS) to study the problem of image restoration. They consider images degraded by linear or zero phase blurring point spread functions (PSF) and additive Gaussian ...

    • Image restoration using HOS and the Radon transform 

      Sayrol Clols, Elisa; Chrysostomos, Nikias; Gasull Llampallas, Antoni (. IEEE, 1993)
      Text en actes de congrés
      Accés obert
      The authors propose the use of higher-order statistics (HOS) to study the problem of image restoration. They consider images degraded by linear or zero phase blurring point spread functions (PSF) and additive Gaussian ...

    • Imaging and discrete modelling of sand shape 

      Rorato, Riccardo (Universitat Politècnica de Catalunya, 2019-11-08)
      Tesi
      Accés obert
      The shape of particles is known to play an important role in soil behaviour, with significant effects of engineering responses. Investigating how the shape of particles can be measured and quantified is therefore considered ...

    • Introducing semi-open learning/teaching into fundamental programming subjects 

      Xhafa Xhafa, Fatos; Marco Gómez, Jordi; Vázquez Alcocer, Pere Pau (Universitat de Barcelona. Edicions i Publicacions, 2006)
      Text en actes de congrés
      Accés obert
      Due to the development of Internet applications, semi-open learning is increasingly being introduced into traditional face-to-face learning and teaching. In several engineering degrees many subjects are developed using a ...

    • Linking shape and rotation of grains during triaxial compression of sand 

      Rorato, Riccardo; Arroyo Alvarez de Toledo, Marcos; Andò, Edward; Gens Solé, Antonio; Viggiani, Gioacchino (2020-11)
      Article
      Accés obert
      Particle shape has a strong effect on the mechanical response of coarse soils. This has been usually observed examining specimen-scale or engineering-scale responses, which are the sum of many microscale interactions. In ...

    • Mechanical optimization of concrete with recycled PET fibres based on a statistical-experimental study 

      Meza, Alejandro; Pujadas Álvarez, Pablo; Meza, Laura Montserrat; Pardo Bosch, Francesc; López Carreño, Rubén-Daniel (Multidisciplinary Digital Publishing Institute (MDPI), 2021-01-06)
      Article
      Accés obert
      Discarded polyethylene terephthalate (PET) bottles have damaged our ecosystem. Problems of marine fauna conservation and land fertility have been related to the disposal of these materials. Recycled fibre is an opportunity ...

    • Micromechanical mapping of polycrystalline cubic boron nitride composites by means of high-speed nanoindentation: Assessment of microstructural assemblage effects 

      Gordon Pozuelo, Sandra; Besharatloo, Hossein; Wheeler, Jeffrey; Rodriguez Suarez, Teresa; Roa Rovira, Joan Josep; Jiménez Piqué, Emilio; Llanes Pitarch, Luis Miguel (Elsevier, 2022-08-28)
      Article
      Accés obert
      Polycrystalline cubic boron nitrides (PcBNs) are composites widely used as cutting tool materials due to their exceptional high hardness and wear resistance. Investigation of their micromechanical properties is key for ...

    • N-gram-based Machine Translation 

      Mariño Acebal, José Bernardo; Banchs Martínez, Rafael Enrique; Crego Clemente, Josep Maria; Gispert Brosa, Adrian de; Lambert, Patrik; Rodríguez Fonollosa, José Adrián; Ruiz Costa-Jussà, Marta (2006-12)
      Article
      Accés obert
      This article describes in detail an n-gram approach to statistical machine translation. This approach consists of a log-linear combination of a translation model based on n-grams of bilingual units, which are referred to ...

    • Novel mechanical characterization of austenite and ferrite phases within duplex stainless steel 

      Besharatloo, H.; Carpio Garza, Marcel Francisco; Cabrera Marrero, José M.; Mateo García, Antonio Manuel; Fargas Ribas, Gemma; Wheeler, Jeffrey; Roa Rovira, Joan Josep; Llanes Pitarch, Luis Miguel (Multidisciplinary Digital Publishing Institute (MDPI), 2020-10)
      Article
      Accés obert

    • On the inverse windowed Fourier transform 

      Rebollo Neira, Laura; Fernández Rubio, Juan Antonio (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1999-11-30)
      Article
      Accés obert
      The inversion problem concerning the windowed Fourier transform is considered. It is shown that, out of the infinite solutions that the problem admits, the windowed Fourier transform is the "optimal" solution according to ...

    • Optimum energy allocation for massive spread-spectrum multiple access in networks of uncoordinated energy-limited terminals 

      Villares Piera, Nemesio Javier; Rey Micolau, Francesc; Sala Álvarez, José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés obert
      This paper derives the energy allocation policy that maximizes the aggregate spectral efficiency of an uncoordinated spread-spectrum multiple access network operating in the large-user regime and subject to a longterm ...

    • PCA based stress monitoring of cylindrical specimens using PZTs and guidedwaves 

      Quiroga Méndez, Jabid; Mujica Delgado, Luis Eduardo; Villamizar Mejía, Rodolfo; Ruiz Ordóñez, Magda; Camacho Navarro, Jhonatan (Multidisciplinary Digital Publishing Institute (MDPI), 2017-12)
      Article
      Accés obert
      Since mechanical stress in structures affects issues such as strength, expected operational life and dimensional stability, a continuous stress monitoring scheme is necessary for a complete integrity assessment. Consequently, ...

    • Performance analysis of a new packet trace compressor based on TCP flow clustering 

      Holanda Filho, Raimir; Verdú Mulà, Javier; García Vidal, Jorge; Valero Cortés, Mateo (Institute of Electrical and Electronics Engineers (IEEE), 2005)
      Text en actes de congrés
      Accés obert
      In this paper we study the properties of a new packet trace compression method based on clustering of TCP flows. With our proposed method, the compression ratio that we achieve is around 3%, reducing the file size, for ...

    • Performance analysis of an ISMA DS-CDMA packet data network 

      Pérez Romero, Jordi; Agustí Comes, Ramon; Sallent Roig, Oriol (Institute of Electrical and Electronics Engineers (IEEE), 1999)
      Text en actes de congrés
      Accés obert
      The efficiency of MAC protocols for a packet switching DS-CDMA network strongly depends on the offered traffic statistic. For bursty sources where transmission needs are restricted to short message lengths, a protocol such ...

    • Pitch determination of noisy speech using higher order statistics 

      Moreno Bilbao, M. Asunción; Rodríguez Fonollosa, José Adrián (. IEEE, 1992)
      Text en actes de congrés
      Accés obert
      The use of third-order statistics to determine the pitch of a speech signal and how they can eliminate the effect of a wide range of noises, including those generated by periodic sources, are shown. The proposed algorithm ...

    • Positive time-frequency distributions based on joint marginal constraints 

      Rodríguez Fonollosa, Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996-08-01)
      Article
      Accés obert
      This correspondence studies the formulation of members of the Cohen-Posch class of positive time-frequency energy distributions. Minimization of cross-entropy measures with respect to different priors and the case of ...