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In this paper, the preliminary technical and economic study for the integration of parabolic trough solar collectors to a geothermal binary cycle plan is presented, in order to maximize the use of medium enthalpy geothermal resource. It is proposed the use of solar collectors to increase the geothermal brine temperature and achieve design temperature of the plant. A study was conducted to determine...
Cardiovascular disease is a serious problem worldwide, are among the leading causes of morbidity and mortality in men and women of all ages. The increased number of deaths from cardiovascular disease is because the western way of life, obesity, diabetes and the traditional methods are not able to predict or detect risk factors in individuals with asymptomatic or early stage disease. Obtaining wave...
This paper presents an electronic ballast based high power LEDs for headlights automobile. The ballast is based on a buck converter to feed a load of high power LED. The load is divided into five high power LED (10W), in automobile lighting systems rapid changes of lighting is required (power changes), therefore the buck converter must deliver constant voltage levels to changes in power and further...
In electricity transmission networks, energy storage systems (ESS) provide a means of upgrade deferral by smoothing supply and matching demand. We develop a mixed integer programming (MIP) extension to the transmission network expansion planning (TEP) problem that considers the installation and operation of ESS as well as additional circuits. The model is demonstrated on the well known Carver's 6-bus...
This works makes a brief review of the current situation, first principles and objectives of Cognitive Radio, as well as, measurements of the electromagnetic environment in the 800–900 MHz UHF Band are carried out in a specific indoor environment in order to analyze and discover spectrum holes to be used by a cognitive receiver for creating white spaces in the selected site, in accordance with its...
This paper describes a basic experiment about linearization of a second order system as a mass spring damper structure, the mathematical model of system is obtained with characteristics of physical components, the linearization of system is made with acquired signal of a no lineal sensor and getting a new lineal equation, for validation of process a simulation with all components is made. In implementation...
This work presents a CMOS compatible method to develop suspended inductors. In other words, if analytical models for designing planar inductors do not take into account unwanted effects (due to the silicon substrate), our proposal is to etch the substrate in order to match both numerical results and experimental data. The accuracy in the inductance value is required not only to develop a design model,...
This paper presents a self-oscillating electronic ballast for a 36 W LED string. The design consists of a simple control that reduces the component number and cost of the ballast. Self-oscillating converters are popular in compact fluorescent lamps; therefore, it is proposed the use of this self-oscillating control technique for the LED lamp. The self-oscillating LED driver represents a very suitable...
This article presents the fundamental theory of inverse optimal control problems and its application in output voltage regulation of power converter circuits. An inverse optimal control problem avoids the explicit solution of the Hamilton-Jacobi-Bellman equation that appears in the formulation of an optimal control problem. Some analytical and numerical developments are performed here in order to...
In this work some basic characteristics of electrical distribution feeders such as its architecture, model, advantage and mainly the problem presented by induced over-voltages on overhead lines due to indirect lightning, is presented. As relevant data, two ways of modeling a distribution feeder JMarti and Pi models are described. Which allow analyzing and obtaining values approximate a real distribution...
Genetic Programming (GP) is an Evolutionary Algorithm commonly used to evolve computer programs in order to solve a particular task. Therefore, GP has been used to tackle different problems like classification and regression. In this work, the capabilities of GP in other types of problems are explored, particularly the feature selection problem. For this purpose, GP is applied to a set of benchmark...
This paper presents an empirical analysis of two well-known crossover operators in real-coded genetic algorithms: Blend Crossover (BLX-a) and Simulated Binary Crossover (SBX), for constrained numerical optimization problems. The aim of the study is to analyze the ability of each operator to generate feasible solutions and also suggest suitable variation operator parameter values for such purpose....
Cardiovascular diseases are on a continuous rise and the number of people who suffer sudden cardiac arrest. It has been recognized a direct influence between the autonomie nervous system and cardiac activity in the human body. Sometimes causes of disease can be explained by studying the relationship of both parts. Analyzing the beat to beat variations from de cardiac events can show valuable information...
The use of artificial neural networks has enabled applications that would be impossible to achieve with conventional electronics, through to versatility that them have, they can be configured as needed and use as required such as classifiers, adaptive filters, controllers and predictors. This paper describes a experimental implementation of virtual speed sensor for DC motor using back-propagation...
This paper presents an analysis and computation of stray losses in the tank cover of a 75 MVA three-phase core-type transformer. Stray losses in the region surrounding high current bushings are estimated using 3D Finite Element (FE) simulations. In the considered region the stray losses are high and its reduction is important to avoid the presence of hot spots in the tank cover of power transformer...
The path planning is one of the most important areas in robotics. Particularly in static environments, there are different algorithms that provide important solutions to this problem. Most of these algorithms are based on traditional geometric techniques such as: modeling of the free space, Voronoi diagrams and potential fields. This paper proposes an alternative to the strategy of decomposition in...
This paper describes a self-balancing mobile robot and their principal features as materials of construction, instrumentation, data communication and control. This kind of robots are an excellent platform for testing different techniques of control due to characteristics of the system (unstable, underactuated). The tilt measurement by means of an Accelerometer-Gyro pair to control a two-wheeled, self-balancing...
This paper presents a study of feasibility assessment of the installation of a photovoltaic system to supply energy to the external lighting of a private mining company, located in Cerro de San Pedro, San Luis Potosí, Mexico. The photovoltaic system will charge batteries during the day, and then these batteries will be used to provide the electricity to the external lighting over the night. This scheme...
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