Ciencia e Ingeniería Neogranadina https://revistas.unimilitar.edu.co/index.php/rcin <p><a href="https://doi.org/10.18359/issn.0124-8170" target="_blank" rel="noopener"><strong>https://doi.org/10.18359/issn.0124-8170</strong></a></p> <p class="p1"><span class="s1">La <em>Revista Ciencia e Ingeniería Neogranadina </em>es una publicación científica arbitrada de acceso abierto que tiene el propósito de ser un canal de difusión del conocimiento en las Ciencias aplicadas, a nivel general, con un enfoque particular con temáticas relacionadas con el diseño, desarrollo, pruebas e implementación de métodos sistemas, dispositivos y soluciones en las áreas de la ingeniería.</span></p> <p class="p1"><span class="s1">La revista publica artículos inéditos que responden a criterios de relevancia; originalidad y pertinencia temática; escritos en español e inglés. Está dirigida a profesores; investigadores; estudiantes; y a organizaciones involucradas en la investigación o aplicación del conocimiento. La frecuencia de publicación es semestral: el primer número se publica en el periodo enero-junio; y el segundo en el periodo julio-diciembre; en el formato electrónico.</span></p> <p class="p1"><span class="s1">Puedes revisar las estadísticas de citación de la revista en&nbsp;<a href="https://scholar.google.com/citations?user=k68rekgAAAAJ&amp;hl=es" target="_blank" rel="noopener" data-saferedirecturl="https://www.google.com/url?q=https://scholar.google.com/citations?user%3Dk68rekgAAAAJ%26hl%3Des&amp;source=gmail&amp;ust=1556281459283000&amp;usg=AFQjCNGCFM3-4I-ziu77puA1y0zS-5kfMw">https://scholar.google.com/<wbr>citations?user=k68rekgAAAAJ&amp;<wbr>hl=es</a></span></p> <p class="p1">&nbsp;</p> Universidad Militar Nueva Granada es-ES Ciencia e Ingeniería Neogranadina 0124-8170 <span>Aquellos autores/as que tengan publicaciones con esta revista, aceptan los términos siguientes:</span><ol type="a"><li>Los autores/as conservan los derechos de autor y garantizan a la revista el derecho de ser la primera publicación de su obra, el cuál estará simultáneamente sujeto a la licencia de <a href="https://creativecommons.org/licenses/by-nc-nd/4.0/" target="_blank">Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional</a>, que permite a terceros compartir la obra siempre que se indique su autor y su primera publicación esta revista. No se puede obtener ningún beneficio comercial. No se pueden realizar obras derivadas.</li><li>Los autores/as podrán adoptar otros acuerdos de licencia no exclusiva de distribución de la versión de la obra publicada (p. ej.: depositarla en un archivo telemático institucional o publicarla en un volumen monográfico) siempre que se indique la publicación inicial en esta revista.</li><li>Se permite y recomienda a los autores/as difundir su obra a través de Internet (p. ej.: en archivos telemáticos institucionales o en su página web) antes y durante el proceso de envío, lo cual puede producir intercambios interesantes y aumentar las citas de la obra publicada. (Véase <a href="http://opcit.eprints.org/oacitation-biblio.html" target="_new">El efecto del acceso abierto</a>).</li></ol> Special Issue in Electrical and Telecommunications Engineering, and Computer Science https://revistas.unimilitar.edu.co/index.php/rcin/article/view/4162 <p>En esta edición especial de la revista <em>Ciencia e Ingeniería Neogranadina</em>, el lector podrá encontrar artículos de investigación y de revisión en las áreas de ingeniería eléctrica, electrónica, telecomunicaciones, y Ciencias de la Computación. Todos los artículos publicados han sido evaluados por revisores nacionales y/o internacionales expertos en cada una de estas temáticas.</p> Dora Maria Ballesteros Derechos de autor 2019 Ciencia e Ingeniería Neogranadina http://creativecommons.org/licenses/by-nc-nd/4.0 2019-06-20 2019-06-20 29 2 10.18359/rcin.4162 Impact of InterChannel Interference in gridless nyquist-wdm systems with and without nonlinear impairments compensation https://revistas.unimilitar.edu.co/index.php/rcin/article/view/3830 <p>In this paper, we expose a characterization of interchannel interference (ICI) effects in gridless Nyquist-WDM systems affected by both contributions: i) due to overlapping among optical carriers and ii) due to stimulation of nonlinear impairments of the optical fiber. The ICI is assessed regarding bit error rate (BER) at 16-Gbaud and 32-Gbaud, as a function of several system parameters. Compensation of nonlinear impairments based on digital backpropagation algorithm is implemented in the DSP-based coherent receiver. The results demonstrated that ICI due to channels overlapped has a higher impact concerning BER than the optical fiber’s nonlinear impairments. Besides, the use of the backpropagation algorithm improves the system performance, reducing up to 3 and 0.7 orders of magnitude of BER in QPSK and 16QAM cases, respectively. It means that this algorithm can minimize the nonlinear effects under variation of system parameters, but its performance is limited in sub-Nyquist cases.</p> Jhon James Granada Torres Juan Pablo López Martínez Eduardo Avendaño Fernandez Ana María Cárdenas Soto Neil Guerrero González Derechos de autor 2019 Ciencia e Ingeniería Neogranadina https://creativecommons.org/licenses/by-nc-nd/4.0 2019-06-20 2019-06-20 29 2 10.18359/rcin.3830 Design of a flattening filter using Fiber Bragg Gratings for EDFA gain equalization: an artificial neural network application https://revistas.unimilitar.edu.co/index.php/rcin/article/view/3818 <p>This paper presents a proposal for the compensation of the non-uniform gain of an Erbium-doped fiber optic amplifier (EDFA) in Wavelength Division Multiplexed (WDM) system using Fiber Bragg Gratings (FBG). In this proposal, the multilayer perceptron feed-forward artificial neural network with backward propagation was trained under the secant method (one-step secant) and was selected according to mean square error measurement. The proposal optimizes the parameters of the FBG such as center frequency, rejection level and length in order to determine a filtering response based on a reduced number of FBGs used to flatten the non-linear response of the amplifier gain. The proposal was evaluated in an amplified WDM system of eight optical carriers located from 195 THz to 196.4 THz.</p> David Montoya Alba Jhonatan Cagua Herrera Gustavo Puerto Leguizamon Derechos de autor 2019 Ciencia e Ingeniería Neogranadina https://creativecommons.org/licenses/by-nc-nd/4.0 2019-06-20 2019-06-20 29 2 10.18359/rcin.3818 Artificial Neural Model based on radial basis function networks used for prediction of compressive strength of fiber-reinforced concrete mixes https://revistas.unimilitar.edu.co/index.php/rcin/article/view/3737 <p>A complex nonlinear relationship exists between the factors influence the compressive design strength of steel fiber reinforced concrete. This relation between input variables, the factors, and the output variable as it is the compressive design strength can be obtained by using an artificial neural model, which has characteristics of self-adapting, self-study and nonlinear mapping. An application of a radial basis function artificial neural model is presented in this paper. Compressive design strengths of steel fiber reinforced concrete endured mixes with diverse proportioning was predicted and compared with the experimental measured results. The predicted values were analyzed by R lineal correlation factor. The results showed that the predicted values based on radial basis function networks presented coincidence with the experimental values, and the predictability of the mechanical property of the neural model is better than that of the multi-layer neural models developed previously by the authors</p> Luis Octavio Gonzalez Salcedo Aydee Patricia Guerrero Zúñiga Silvio Delvasto Arjona Adrián Luis Ernesto Will Derechos de autor 2019 Ciencia e Ingeniería Neogranadina https://creativecommons.org/licenses/by-nc-nd/4.0 2019-06-20 2019-06-20 29 2 10.18359/rcin.3737 Simulation of physical habitat in Ayuquila-Armeria river in the west of Mexico https://revistas.unimilitar.edu.co/index.php/rcin/article/view/3128 <p>En la última década las simulaciones ecohidráulicas han expuesto la capacidad de generar los campos de las variables hidráulicas y los biológicos que establecen el hábitat físico en los ríos. El desarrollo de modelos bidimensionales empleados en la Metodología Incremental de Caudal en la Corriente (IFIM), ha permitido representar el hábitat utilizable para las especies de interés. En México en el año 2012 se publicó la norma mexicana, que establece el procedimiento para la determinación del caudal ecológico, en su apéndice normativo E considera la simulación ecohidráulica. El objetivo de este estudio es generar las simulaciones hidráulicas combinadas con las curvas de idoneidad de hábitat de peces en el Río Ayuquila-Armería, para determinar el Hábitat Potencial Útil, y considerar las series en el tiempo del régimen hidrológico actual. Para generar las simulaciones ecohidráulicas, se selección un tramo de río aguas abajo de la confluencia del río Ayuquila y Tuxcacuesco, se realizaron tres campañas de campo para medir los parámetros de profundidad, velocidad y sustrato dentro del río. Para simular el hábitat ecohidráulico se usó la plataforma FaSTMECH dentro del software iRIC 1.5, se calibraron y validaron las simulaciones. Como resultado, se obtuvieron simulaciones a diferente caudal y su variabilidad de hábitat potencial útil para cada una de las especies seleccionadas, además, se definió el Hábitat Potencial Útil para las series en el tipo del régimen hidrológico actual. El modelo iRIC 1.5 en su plataforma FaSTMECH fue adecuado para simular las características ecohidráulica en dos dimensiones del tramo seleccionado.</p> Demetrio Meza Rodríguez Luis Manuel Martinez Rivera José Luis Olguin López Ángel Aguirre García Derechos de autor 2019 Ciencia e Ingeniería Neogranadina https://creativecommons.org/licenses/by-nc-nd/4.0 2019-06-20 2019-06-20 29 2 10.18359/rcin.3128 Multitemporal analysis of the flow of sediments using MODIS MYD09 and MOD09 images https://revistas.unimilitar.edu.co/index.php/rcin/article/view/3854 <p>In this article, we show the development of an empirical model applied to the MODIS MYD09 and MOD09 images based on in-situ samples of total suspended solids (TSS) taken in the waters of the Gulf of Urabá (Colombia) between 2011 and 2015. The spatial and temporal variability at the annual and monthly scale of the sediments was analyzed, showing a marked difference during the two climatic seasons (of rain and drought) both in the concentration and in the direction of the sedimentation plume. The best model applied to the images for the recovery of the TSS was the polynomial functional form of grade 3 that relates the sedimentation with the reflectance of band 2 applied in the MYD09 images. Among the results obtained, it is found that there are annual average values higher than 100mgL-1 in El Rotico Bay due to the contributions given by the Atrato River in the El Roto mouth and high sediment concentration in Bahia Colombia during the first quarter of the year mostly because of the direction of the winds. The research allows us to show the benefits of digital image processing to retrieve ocean color data such as sedimentation, in order to obtain relevant results that allow an analysis of the sedimentation flows within the gulf, especially because it is constituted a place of ecological importance for its great marine biodiversity and where knowledge of the dynamics and concentration of sediments is scarce.</p> Ivan Dario Carrillo Duran Ruben Javier Medina Daza Derechos de autor 2019 Ciencia e Ingeniería Neogranadina https://creativecommons.org/licenses/by-nc-nd/4.0 2019-06-20 2019-06-20 29 2 10.18359/rcin.3854 Numerical simulation of an acoustic tube https://revistas.unimilitar.edu.co/index.php/rcin/article/view/3701 <p>In this work, we introduce a staggered finite difference method to analyze and simulate the generation and behavior of sound waves inside a tube. We describe a special numerical treatment on the boundary conditions which model reflection and transmission phenomena by means of the acoustic impedance concept. Through an exhaustive sampling of frequencies and the fast Fourier transform (FFT) a modal analysis is performed when the air inside the tube is subjected to both harmonic and random disturbances. Finally, we analyze the quality factor behavior of the acoustic system to confirm its exponential character as well as its dependence on the acoustic impedance.&nbsp; The results show the utility of the method in the acoustic phenomena simulation such as reflection, transmission, dissipation of sound waves and resonance in bounded domains. The propose method allows analyzing general cases such as the dispersion of non-harmonic sound waves.</p> Jorge Mauricio Ruiz Vera Leonardo Vásquez Martínez Derechos de autor 2019 Ciencia e Ingeniería Neogranadina https://creativecommons.org/licenses/by-nc-nd/4.0 2019-06-20 2019-06-20 29 2 10.18359/rcin.3701 Complementarity of energy resources for the electrical generation: a review https://revistas.unimilitar.edu.co/index.php/rcin/article/view/3625 <p>Given the needs to increase the rates of electricity coverage, to generate measures to adapt the Climate Change and to diversify the Matrix Energy in the countries, there have been developed a lot of studies to establish the complementarity of energy resources. In that sense, this document presents a literature review of some regions worldwide, to highlight the research initiatives around the study of energy complementarity. This review includes studies about establishing the complementarity of solar, wind and water resources, and includes demand, electricity prices, etc. Among the results found, it is noted that although several studies conducted around the world have shown that most of the renewable energy production systems has a variable and unpredictable nature, make use of more than one type of renewable energy improves the performance of those systems, it decreases the generation fluctuations and increases the system reliability. Also, it is found that the correlation factor is the most used method for the evaluation of energy complementarity. Other methods include simulations, model application, optimization algorithms, etc. In the same way, the input information for the realization of these studies comes from the registries of the electrical power systems of the countries, from the application of meteorological prediction models, from historical climatological data coming from satellites or from measurements of meteorological stations, among others. There are opportunities observed in Colombia to generate knowledge about complementarity between energy resources.</p> Angélica Vanessa Aldana Urrea Diego Julián Rodríguez Patarroyo Derechos de autor 2019 Ciencia e Ingeniería Neogranadina https://creativecommons.org/licenses/by-nc-nd/4.0 2019-06-20 2019-06-20 29 2 10.18359/rcin.3625 Use of energy storage systems in the optimal operation of distribution networks https://revistas.unimilitar.edu.co/index.php/rcin/article/view/3635 <p>This paper proposes a methodology for the purchase and sale of energy which consider energy storage elements in the operation of distribution systems and whose objective is to improve the utilities of the network operator by the load curve management. In the formulation of the problem are proposed two mathematical models whose objective function is the minimization of the cost of the purchase of electric energy. The first (linear) model includes the purchase of energy and the second (non-linear) considers, in addition to the above, the energy losses of the distribution system. Both mathematical models consider operational restrictions on energy storage and electrical power grid. The proposed methodology can be used by network operators as a strategy for the purchase and sale of energy, additionally is proposed a mathematical tool that can be applied in the operation and planning of distribution systems with energy storage elements. The proposed methodology is verified using test systems of different sizes, obtaining results that corroborate an economic benefit when energy storage is used in the operation of the distribution systems.</p> Alejandro Valencia Diaz Ramón Alfonso Gallego Rendón Ricardo Alberto Hincapié Isaza Derechos de autor 2019 Ciencia e Ingeniería Neogranadina https://creativecommons.org/licenses/by-nc-nd/4.0 2019-06-20 2019-06-20 29 2 10.18359/rcin.3635