Enviaments recents

  • Online reinforcement learning using a probability density estimation 

    Agostini, Alejandro Gabriel; Celaya Llover, Enric (The MIT Press. Massachusetts Institute of Technology, 2017-01-01)
    Article
    Accés obert
    Function approximation in online, incremental, reinforcement learning needs to deal with two fundamental problems: biased sampling and nonstationarity. In this kind of task, biased sampling occurs because samples are ...
  • Using a new high-throughput video-tracking platform to assess behavioural changes in Daphnia magna exposed to neuro-active drugs 

    Simão, Fátima C.P.; Martínez Jerónimo, Fernando; Blasco Gutiérrez, Víctor; Moreno-Noguer, Francesc; Porta Pleite, Josep Maria; Pestana, Joao; Soarez, Amadeu; Raldúa Pérez, Demetrio José; Barata Martí, Carlos (Elsevier, 2019-04-20)
    Article
    Accés obert
    One of the major challenges that faces today regulatory risk assessment is to speed up the way of assessing threshold sublethal detrimental effects of existing and new chemical products. Recently advances in imaging allows ...
  • Solution intervals for variables in spatial RCRCR linkages 

    Celaya Llover, Enric (2019-03-01)
    Article
    Accés obert
    An analytic method to compute the solution intervals for the input variables of spatial RCRCR linkages and their inversions is presented. The input-output equation is formulated as the intersection of a single ellipse with ...
  • Further characterization of the zebrafish model of acrylamide acute neurotoxicity: gait abnormalities and oxidative stress 

    Faria, Melissa; Valls Brusco, Arnau; Prats Miravitllas, Eva; Bedrossiantz, Juliette; Orozco, Manuel; Porta Pleite, Josep Maria; Gómez Oliván, Leobardo Manuel; Raldúa Pérez, Demetrio José (Nature, 2019-05-08)
    Article
    Accés obert
    Occupational, accidental, or suicidal exposure to acrylamide (ACR) may result in a neurotoxic syndrome. Development of animal models of acrylamide neurotoxicity is necessary for increasing our mechanistic understanding of ...
  • On Cayley's factorization with an application to the orthonormalization of noisy rotation matrices 

    Sarabandi, Soheil; Pérez Gracia, Alba; Thomas, Federico (2019-05-09)
    Article
    Accés obert
    A real orthogonal matrix representing a rotation in four dimensions can be decomposed into the commutative product of a left- and a right-isoclinic rotation matrix. This operation, known as Cayley's factorization, directly ...
  • A survey on the computation of quaternions from rotation matrices 

    Sarabandi, Soheil; Thomas, Federico (ASME PRESS, 2019-04-01)
    Article
    Accés obert
    The parameterization of rotations is a central topic in many theoretical and applied fields such as rigid body mechanics, multibody dynamics, robotics, spacecraft attitude dynamics, navigation, 3D image processing, computer ...
  • A Convolutional Neural Network for the automatic diagnosis of collagen VI-related muscular dystrophies 

    Rodríguez Bazaga, Adrián; Roldán Molina, Mónica; Badosa Gallego, Maria del Carmen; Jiménez Mallebrera, Cecilia; Porta Pleite, Josep Maria (2019-12-01)
    Article
    Accés restringit per política de l'editorial
    The development of machine learning systems for the diagnosis of rare diseases is challenging, mainly due to the lack of data to study them. This paper surmounts this obstacle and presents the first Computer-Aided Diagnosis ...
  • Closed-form position analysis of variable geometry trusses 

    Porta Pleite, Josep Maria; Thomas, Federico (2017-03-01)
    Article
    Accés obert
    Variable geometry trusses are composed, in general, of unit cells which can be modeled as bars connected by spherical joints. Under mild conditions, it has been shown that the only feasible cells are topologically equivalent ...
  • Uncalibrated visual servo for unmanned aerial manipulation 

    Santamaria Navarro, Àngel; Grosch Obregon, Patrick John; Lippiello, Vincenzo; Solà Ortega, Joan; Andrade-Cetto, Juan (Institute of Electrical and Electronics Engineers (IEEE), 2017-08-01)
    Article
    Accés obert
    This paper addresses the problem of autonomous servoing an unmanned redundant aerial manipulator using computer vision. The overactuation of the system is exploited by means of a hierarchical control law, which allows to ...
  • New algebraic conditions for the identification of the relative position of two coplanar ellipses 

    Alberich Carramiñana, Maria; Elizalde, Borja; Thomas, Federico (2017-05-01)
    Article
    Accés obert
    The identification of the relative position of two real coplanar ellipses can be reduced to the identification of the nature of the singular conics in the pencil they define and, in general, their location with respect to ...
  • On Cayley's factorization of 4D rotations and applications 

    Pérez Gracia, Alba; Thomas, Federico (2017-03-01)
    Article
    Accés obert
    A 4D rotation can be decomposed into a left- and a right-isoclinic rotation. This decomposition, known as Cayley’s factorization of 4D rotations, can be performed using the Elfrinkhof–Rosen method. In this paper, we present ...
  • A bayesian approach to simultaneously recover camera pose and non-rigid shape from monocular images 

    Moreno-Noguer, Francesc; Porta Pleite, Josep Maria (2016)
    Article
    Accés obert
    In this paper we bring the tools of the Simultaneous Localization and Map Building (SLAM) problem from a rigid to a deformable domain and use them to simultaneously recover the 3D shape of non-rigid surfaces and the sequence ...

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