Edgar R. Arce-Santana

  • Citations Per Year
Learn More
This study presents different methods for automatic sleep classification based on heart rate variability (HRV), respiration and movement signals recorded through bed sensors. Two methods for feature extraction have been implemented: time variant-autoregressive model (TVAM) and wavelet discrete transform (WDT); the obtained features are fed into two(More)
Fluorescence lifetime microscopy imaging (FLIM) is an optic technique that allows a quantitative characterization of the fluorescent components of a sample. However, for an accurate interpretation of FLIM, an initial processing step is required to deconvolve the instrument response of the system from the measured fluorescence decays. In this paper, we(More)
In this work, it is proposed a simple off-line identification algorithm for an induction motor (IM) based on a novel optimization scheme, called hyperplanes optimization. The main idea of the identification scheme is to convert the problem of parameters characterization to a finite dimensional optimization problem over a bounded set. The proposed approach(More)
This paper presents an analysis of different multimodal similarity metrics for parametric image registration based on particle filtering. Our analysis includes four similarity metrics found in the literature and we propose a new metric based on the discretization of the kernel predictability, function recently introduced by Gómez-García et al.(More)
In this paper, we investigate novel low-dimensional and model-free representations for multi-spectral fluorescence lifetime imaging microscopy (m-FLIM) data. We depart from the classical definition of the phasor in the complex plane to propose the extended output phasor (EOP) and extended phasor (EP) for multi-spectral information. The frequency domain(More)
The desire to reduce complexity at the mobile units, in current code division multiple access (CDMA) mobile systems, has led research pursuing to transfer the signal processing from the mobile unit to the base station. The aim of this paper is to investigate a new bitwise scheme for transmitter precoding subject to a power constrained transformation at the(More)
Multispectral fluorescence lifetime imaging (m-FLIM) can potentially allow identifying the endogenous fluorophores present in biological tissue. Quantitative description of such data requires estimating the number of components in the sample, their characteristic fluorescent decays, and their relative contributions or abundances. Unfortunately, this inverse(More)
Time-deconvolution of the instrument response from fluorescence lifetime imaging microscopy (FLIM) data is usually necessary for accurate fluorescence lifetime estimation. In many applications, however, the instrument response is not available. In such cases, a blind deconvolution approach is required. An iterative methodology is proposed to address the(More)
Approximate string matching (ASM) is a well-known computational problem with important applications in database searching, plagiarism detection, spelling correction, and bioinformatics. The two main issues with most ASM algorithms are (1) computational complexity, and (2) low specificity due to a large amount of false positives being reported. In this(More)
The paper addresses the problem of identification of fluorescent molecules, or fluorophores, in biological samples obtained from time-resolved fluorescence microscopy. The contribution of this work is an algorithm, based on particle filter optimization, that solves the spectral unmixing problem for more than two fluorophores even when they present highly(More)