Browsing Productos de investigación by Title
Now showing items 339-358 of 798
-
Fractional Fourier analysis of random signals and the notion of α -Stationarity of the Wigner-Ville distribution
(2013)In this paper, a generalized notion of wide-sense α-stationarity for random signals is presented. The notion of stationarity is fundamental in the Fourier analysis of random signals. For this purpose, a definition of the ... -
Fractional sampling theorem for -bandlimited random signals and its relation to the von neumann ergodic theorem
(Institute of Electrical and Electronics Engineers Inc., 2014)Considering that fractional correlation function and the fractional power spectral density, for -stationary random signals, form a fractional Fourier transform pair. We present an interpolation formula to estimate a random ... -
Fracture Dynamic Analysis of Cracked Reissner Plates Using the Boundary Element Method
(Cartagena de IndiasIngeniería Mecánica, 2020-05-15)This work presents a Dual Boundary Element Method/Dual Reciprocity Boundary Element Method formulation for the dynamic analysis of fractured shear deformable plates. Equations for the Dual Boundary Element Method, including ... -
Fringe quality map for fringe projection profilometry in LabVIEW
(Sociedad Espanola de Optica, 2018)The phase retrieval process is mainly affected by local shadows, irregular surface brightness and fringe discontinuities. To overcome these problems, image-processing strategies are carried out such as binary masks, ... -
From a Home-Area-Network to a Secure Internet of Things Application
(Springer, 2019)In this paper, we present a secure system to control devices at home through the web, which we implement based on the Do It Yourself (DIY) culture. We use a model based on the Goal Question Metric approach to evaluate the ... -
Fuzzy logic methodology to study the behavior of energy transformation processes based on statistics T2and Q
(Cartagena de Indias, 2020-10)In the processes of energy transformation, to carry out an adequate follow-up of the process parameters represent an opportunity to propose strategies to improve the processes' performance. For this reason, it is essential ... -
Gender inequality in latin america: a multidimensional analysis based on eclac indicators
(Cartagena de Indias, 2021-11-27)This article analyzes the behavior of gender indicators on the economic, physical, and decision-making autonomy of Latin-American women, based on data compiled and published in 2020 by the Gender Equality Observatory of ... -
Generalized molecular descriptors derived from event-based discrete derivative
(Bentham Science Publishers B.V., 2016)In the present study, a generalized approach for molecular structure characterization is introduced, based on the relation frequency matrix (F) representation of the molecular graph and the subsequent calculation of the ... -
Generating density maps for convolutional neural network-based cell counting in specular microscopy images
(Cartagena de Indias, 2020)Accurate endothelial cell density with specular microscopy is essential for correct clinical assessment of the cornea. Commercial specular microscopes incorporate automated cell segmentation methods to estimate cell density. ... -
Generating dynamic fuzzy models for prediction problems
(2009)In this paper we present a new method to generate interpretable fuzzy systems from training data. A fuzzy system is developed for nonlinear systems modeling and for system state forecasting. The antecedent partition uses ... -
Generational diversity and quality of work life: Case study in the Colombian logistic sector
(International Business Information Management Association, IBIMA, 2019)Drawing upon generational differences in work values and attitudes, this article examines perception of quality of work life of three generational cohorts using survey data collected from 522 employees of the logistic ... -
Genericity of Continuous Maps with Positive Metric Mean Dimension
(Cartagena de Indias, 2021-11-02)M. Gromov introduced the mean dimension for a continuous map in the late 1990’s, which is an invariant under topological conjugacy. On the other hand, the notion of metric mean dimension for a dynamical system was introduced ... -
Genetic Advances in Post-traumatic Stress Disorder
(Elsevier Doyma, 2018)Post-traumatic stress disorder, or PTSD, is a condition that affects a subgroup of individuals that have suffered a previous traumatic event capable of generating changes at a psychological and behavioural level. These ... -
Genetic diversity of Rhizoctonia solaniAG-3PT, the etiological cause of stem canker and black scurf in Colombian potatoes
(Cartagena de Indias, 2021-10-18)Stem canker and black scurf are potato diseases caused by the fungus Rhizoctonia solani, anastomosisgroup 3 (AG-3PT). This fungus affects potato roots, stems, and tubers, reducing crop yields. This study aimsto determine ... -
Genetic-convex model for dynamic reactive power compensation in distribution networks using D-STATCOMs
(Cartagena de IndiasCampus TecnológicoIngeniería Eléctrica, 2021-04-21)This paper proposes a new hybrid master–slave optimization approach to address the problem of the optimal placement and sizing of distribution static compensators (D-STATCOMs) in electrical distribution grids. The optimal ... -
Girls Do Not Sweat: the Development of Gender Stereotypes in Physical Education in Primary School
(Cartagena de Indias, 2020-06-27)Despite efforts towards gender equality, from an early age, girls practice sport less than boys. Explaining this is paramount to psychology. Stereotypes about gender-appropriate behaviour play a key role in doing physical-sports ... -
Global Optimal Stabilization of MT-HVDC Systems: Inverse Optimal Control Approach
(Cartagena de Indias, 2021-11-17)The stabilization problem of multi-terminal high-voltage direct current (MT-HVDC) systems feeding constant power loads is addressed in this paper using an inverse optimal control (IOC). A hierarchical control structure ... -
Global stabilization of a reaction wheel pendulum: A discrete-inverse optimal formulation approach via a control lyapunov function
(Cartagena de Indias, 2020-10-26)This paper deals with the global stabilization of the reaction wheel pendulum (RWP) in the discrete-time domain. The discrete-inverse optimal control approach via a control Lyapunov function (CLF) is employed to make the ... -
GridUI, a RESTful web service and ubiquitous UI for accessing HPC resources
(Institute of Electrical and Electronics Engineers Inc., 2016)This paper describes the design of a user interface between a high-throughput computing pool system like HTCondor and a device-independent user interface. This design aims to bring parallel tools and resources to a novel ... -
Group-Theory for the Analysis of Heuristic Algorithms in Power Distribution Systems
(Institute of Electrical and Electronics Engineers Inc., 2018)This paper applies group theory to four classic problems in power distribution systems, namely: phase balancing, primary feeder reconfiguration, optimal tap setting of voltage regulator transformers and optimal placement ...
