Listar Institute of New Imaging Technologies (INIT) por título

Mostrando ítems 549-568 de 853

    • openAccess   On the Integration of Model-Based Feature Information in Product Lifecycle Management Systems 

      Dorribo Camba, Jorge; Contero, Manuel; Company, Pedro; Pérez, David Elsevier (2017-12)
      As CAD models continue to become more critical information sources in the product’s lifecycle, it is necessary to develop efficient mechanisms to store, retrieve, and manage larger volumes of increasingly complex data. ...

    • closedAccess   On the performance of two clustering methods for spatial functional data 

      Romano, Elvira; Mateu, Jorge; Giraldo, Ramón Springer Verlag (2015-10)
      The performance of two clustering strategies for spatially correlated functional data based on the same measure of spatial dependence is examined and compared. In particular, the role of the spatial dependence computed by ...

    • openAccess   On the Role of Geometric Constraints to Support Design Intent Communication and Model Reusability 

      Company, Pedro; Naya, Ferrán; Contero, Manuel; Dorribo Camba, Jorge CAD Solutions (2020)
      The assurance of model quality in parametric CAD implies that designers must build models that facilitate reuse while retaining their design intent when modified. In this context, a suitable selection of geometric constraints ...

    • openAccess   On the suitability of resampling techniques for the class imbalance problem in credit scoring 

      Marqués Marzal, Ana Isabel; García, Vicente; Sánchez Garreta, Josep Salvador Palgrave Macmillan (2013)
      In real-life credit scoring applications, the case in which the class of defaulters is under-represented in comparison with the class of non-defaulters is a very common situation, but it has still received little attention. ...

    • openAccess   On the trend detection of time-ordered intensity images of point processes on linear networks 

      Chaudhuri, Somnath; Moradi, Mehdi; Mateu, Jorge Taylor & Francis (2023)
      Spatial point processes on linear networks are increasingly getting attention in different disciplines such as traffic accidents and street crime analysis. Dealing with a set of time-ordered point patterns on a linear ...

    • closedAccess   On the use of data filtering techniques for credit risk prediction with instance-based models 

      García, Vicente; Sánchez Garreta, Josep Salvador; Marqués Marzal, Ana Isabel Elsevier (2012)
      Many techniques have been proposed for credit risk prediction, from statistical models to artificial intelligence methods. However, very few research efforts have been devoted to deal with the presence of noise and outliers ...

    • closedAccess   On the effectiveness of preprocessing methods when dealing with different levels of class imbalance 

      Sánchez Garreta, Josep Salvador; García, Vicente; Mollineda, Ramón A. Elsevier (2012)
      The present paper investigates the influence of both the imbalance ratio and the classifier on the performance of several resampling strategies to deal with imbalanced data sets. The study focuses on evaluating how learning ...

    • closedAccess   On wavelet-based energy densities for spatial point processes 

      D'Ercole, Roberto; Mateu, Jorge Springer (2013-08)
      A spatial point process can be considered a random measure and therefore represented as a countable sum of Delta Dirac measures concentrated at some points of the process. Applying a two-dimensional continuous wavelet ...

    • openAccess   On-axis non-linear effects with programmable Dammann lenses under femtosecond illumination 

      Pérez Vizcaíno, Jorge; Mendoza-Yero, Omel; Borrego Varillas, Rocío; Mínguez-Vega, Gladys; Vázquez de Aldana, Javier R.; Lancis, Jesús Optical Society of America (2013)
      We demonstrate the utilization of Dammann lenses codified onto a spatial light modulator (SLM) for triggering non-linear effects. With continuous wave illumination Dammann lenses are binary phase optical elements that ...

    • openAccess   Online reconstruction-free single-pixel image classification 

      Latorre Carmona, Pedro; Traver Roig, Vicente Javier; Sánchez Garreta, Josep Salvador; Tajahuerce, Enrique Elsevier (2019-04)
      In single-pixel imaging, a series of illumination patterns are projected onto an object and the reflected or transmitted light from the object is integrated by a photodetector (the single-pixel detector). Then, from the ...

    • openAccess   Open City Toolkit: el rol de las ciencias geoespaciales para la realización de ciudades abiertas y participativas 

      Trilles, Sergio; Granell, Carlos; Degbelo, Auriol; Bhattacharya, Devanjan eGeoMapping S.L. (2017)
      En la literatura se distinguen dos enfoques diferentes para la transformación de las actuales ciudades en ciudades inteligentes: (a) ofrecer sistemas más eficientes y autónomos a través del uso de la tecnología, sensores, ...

    • openAccess   Open Source Based Deployment of Environmental Data into Geospatial Information Infrastructures 

      Gil, José; Díaz Sánchez, Laura; Granell, Carlos; Huerta, Joaquin IGI Global (2012)
      Today, scientists use local and closed geospatial solutions to run their models and store their results. This may limit their ability to share their models, and results with other interested colleagues. This scenario ...

    • openAccess   Opening up Smart Cities: Citizen-Centric Challenges and Opportunities from GIScience 

      Degbelo, Auriol; Granell, Carlos; Trilles, Sergio; Bhattacharya, Devanjan; Casteleyn, Sven; Kray, Christian MDPI (2016-02)
      The holy grail of smart cities is an integrated, sustainable approach to improve the efficiency of the city’s operations and the quality of life of citizens. At the heart of this vision is the citizen, who is the primary ...

    • openAccess   Optical characterisation and photothermal conversion efficiency of a water-based carbon nanofluid for direct solar absorption applications. 

      Gimeno Furió, Alexandra; Martinez Cuenca, Raul; Mondragon, Rosa; VELA GASULLA, ANTONIO FABIAN; Doñate-Buendía, Carlos; Mínguez-Vega, Gladys; Hernandez, Leonor Elsevier (2020-12-01)
      Carbon nanoparticles are very useful in solar thermal applications as they absorb much of the solar spectrum and can be inexpensive. Water-based carbon nanofluids with two different concentrations (3 and 33 mg l−1) were ...

    • openAccess   Optical frequency combs generated by acousto-optic frequency-shifting loops 

      Durán, Vicente; guillet de chatellus, hugues; Schnébelin, Come; Kanagaraj, Nithyanandan; Djevarhidjian, Leo; Clement Bellido, Juan; Fernandez-Pousa, Carlos IEEE (2019-12-01)
      A recirculating loop that includes an acousto-optic frequency shifter (AOFS) constitutes a versatile procedure to generate an optical frequency comb (OFC) from a continuous wave (cw) laser. This scheme, implementable with ...

    • closedAccess   Optimal Multicasting in Millimeter Wave 5G NR with Multi-beam Directional Antennas 

      Chukhno, Nadezhda; Chukhno, Olga; Moltchanov, Dmitri; Molinaro, Antonella; Gaidamaka, Yuliya; Samouylov, Konstantin; Koucheryavy, Yevgeni; ARANITI, Giuseppe Institute of Electrical and Electronics Engineers (2021-12)
      The support of multicast communications in the fifth-generation (5G) New Radio (NR) system poses unique challenges to system designers. Particularly, the highly directional antennas do not allow to serve all the user ...

    • openAccess   Optimal Placement of Social Digital Twins in Edge IoT Networks 

      Chukhno, Olga; Chukhno, Nadezhda; ARANITI, Giuseppe; CAMPOLO, Claudia; Iera, Antonio; Molinaro, Antonella MDPI (2020)
      In next-generation Internet of Things (IoT) deployments, every object such as a wearable device, a smartphone, a vehicle, and even a sensor or an actuator will be provided with a digital counterpart (twin) with the aim ...

    • openAccess   Optimal Receivers Location for Passive Indoor Positioning based on BLE 

      De Brouwer, Roald; Torres-Sospedra, Joaquín; Trilles, Sergio; Berkvens, Rafael CEUR Workshop Proceedings (2021-11)
      Indoor Positioning Systems are attracting many researchers, being Bluetooth Low Energy gaining some attention recently. The recent need to track people, ensuring low density of people in some areas, made the research ...

    • openAccess   Optimization of acousto-optic optical frequency combs 

      Kanagaraj, Nithyanandan; Djevarhidjian, Leo; Durán, Vicente; Schnebelin, Come; guillet de chatellus, hugues Optical Society of America (2019)
      Acousto-optic optical frequency combs can easily produce several hundreds of mutually coherent lines from a single laser, by successive frequency shifts in a loop containing an acousto-optic frequency shifter. They combine ...

    • openAccess   Optomechanical Coupling Optimization in Engineered Nanocavities 

      Edelstein, Shulamit; Gomis-Bresco, Jordi; Arregui, Guillermo; Koval, P.; Lanzillotti Kimura, Norberto Daniel; Torrent, Daniel; Sotomayor Torres, Clivia M; García, Pedro David Wiley (2024)
      In optomechanics, the interaction between light and matter is enhanced by engineering cavities where the electromagnetic field and the mechanical displacement are confined simultaneously within the same volume. This leads ...