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New Cluster Selection and Fine-grained Search for k-Means Clustering and Wi-Fi Fingerprinting
(IEEE, 2020-06-02)
Wi-Fi fingerprinting is a popular technique for Indoor Positioning Systems (IPSs) thanks to its low complexity and the ubiquity of WLAN infrastructures. However, this technique may present scalability issues when the ...
Far-field perfect imaging with time-modulated gratings
(American Physical Society, 2022-06-22)
We study the capabilities of time-modulated diffraction gratings as imaging devices. It is shown that a time-dependent but transversally homogeneous slab can be used to make a perfect image of an object in the far-field, ...
Transfer Deep Learning for Remote Sensing Datasets: A Comparison Study
(IEEE, 2022-07-17)
Remote sensing is also benefiting from the quick development of deep learning algorithms for image analysis and classification tasks. In this paper, we evaluate the classification performance of a well-known Convolutional ...
A Spatially Correlated Model with Generalized Autoregressive Conditionally Heteroskedastic Structure for Counts of Crimes
(MDPI, 2022-06-29)
Crime is a negative phenomenon that affects the daily life of the population and its development. When modeling crime data, assumptions on either the spatial or the temporal relationship between observations are necessary ...
Spatial point processes and neural networks: A convenient couple
(Elsevier, 2022)
Different spatial point process models and techniques have been developed in the past decades to facilitate the statistical analysis of spatial point patterns. However, in some cases the spatial point process methodology ...
Coupling Helmholtz resonators for sound manipulation
(IEEE, 2021-09-20)
In this work, we discuss the interaction between Helmholtz resonators, using the finite element method. We show that the coupling between two spheres gives rise to two resonant modes at low frequencies. One is symmetric ...
UJIIndoorLoc-Mag: A New Database for Magnetic Field-Based Localization Problems
(IEEE, 2015)
Indoor localization is a key topic for mobile computing. However, it is still very difficult for the mobile sensing community to compare state-of-art Indoor Positioning Systems due to the scarcity of publicly available ...
Dataset of inertial measurements of smartphones and smartwatches for human activity recognition
(Elsevier, 2023-11-17)
This article describes a dataset for human activity recognition with inertial measurements, i.e., accelerometer and gyroscope, from a smartphone and a smartwatch placed in the left pocket and on the left wrist, respectively. ...
Influence of Measured Radio Map Interpolation on Indoor Positioning Algorithms
(IEEE, 2023-07-24)
Indoor positioning and navigation increasingly have become popular, and there are many different approaches, using different technologies. In nearly all of the approaches, the locational accuracy depends on signal propagation ...
Analysing the effect of shot noise in indirect Time-of-Flight cameras
(Elsevier B.V., 2024)
Continuous wave indirect Time-of-Flight cameras obtain depth images by emitting a modulated continuous
light wave and measuring the delay of the received signal. In this paper we generalize the estimation of
the effect ...