Results 11 to 20 of about 7,962 (107)
Complexity, Volume 2021, Issue 1, 2021., 2021 The design of a robust flatness‐based tracking control for the DC/DC Buck converter‐DC motor system is developed in this paper. The design of the control considers the dynamics of a renewable energy power source that plays the role of the primary power supply associated with the system.
Ramón Silva-Ortigoza +7 more
wiley +1 more source
Mathematical Problems in Engineering, Volume 2021, Issue 1, 2021., 2021 In this paper, the trajectory tracking control and the field programmable gate array (FPGA) implementation between a recurrent neural network with time delay and a chaotic system are presented. The tracking error is globally asymptotically stabilized by means of a control law generated from the Lyapunov–Krasovskii and Lur’e theory. The applicability of
J. Perez-Padron +5 more
wiley +1 more source
Evaporation From Unsaturated Soils as a Function of the Air and Soil Sides of the Land Surface
Water Resources Research, Volume 56, Issue 12, December 2020., 2020 Abstract A theoretical framework for computing the evaporation from unsaturated soils is presented and validated based on laboratory experiments that were conducted in an uncontrolled environment where forcing variables vary in time according to diurnal meteorological cycles. This theory introduces a dimensionless number that controls the ratio between
Pedro de Amesti +2 more
wiley +1 more source
Cherenkov Emission Generated by a Modulated Source in 2D Dispersive Photonic Crystal Slabs
Advances in Materials Science and Engineering, Volume 2020, Issue 1, 2020., 2020 This work presents a systematic numerical study of Cherenkov optical radiation generated by a modulated source that moves with uniform velocity on a two‐dimensional (2D) photonic crystal (PCr) slab surface. We apply the FDTD technique with emphasis on the dispersion properties of the periodic medium to perform our numerical analysis.
Erika Martínez-Sánchez +5 more
wiley +1 more source
Tejiendo voces. Jóvenes universitarios opinan sobre la apropiación de Internet en la vida académica
Chasqui, 2012 Artículo producto de la investigación titulada “Acceso, uso y apropiación de las Tecnologías de Información y Comunicación, TIC, en la comunidad académica de la UNAM”, realizada en el marco del Macroproyecto 1 “Tecnologías para la universidad de la ...
Delia Crovi Druetta +1 more
doaj +1 more source
Implementation of a Controller to Eliminate the Limit Cycle in the Inverted Pendulum on a Cart
Complexity, Volume 2019, Issue 1, 2019., 2019 A frequency response‐based linear controller is implemented to regulate the inverted pendulum on a cart at the inverted position. The objective is to improve the performance of the control system by eliminating the limit cycle generated by the dead‐zone, induced by static friction, at the actuator of the mechanism.
Mayra Antonio-Cruz +4 more
wiley +1 more source
Integrating Frequency Setting, Timetabling, and Route Assignment to Synchronize Transit Lines
Journal of Advanced Transportation, Volume 2019, Issue 1, 2019., 2019 Synchronization of different transit lines is an important activity to increase the level of service in transportation systems. In particular, for passengers, transferring from one line to another, there may be low‐frequency periods and transfer zones where walking is needed, or passengers are exposed to adverse weather conditions and uncomfortable ...
Omar J. Ibarra-Rojas +4 more
wiley +1 more source
Optimizing a Biobjective Production‐Distribution Planning Problem Using a GRASP
Complexity, Volume 2018, Issue 1, 2018., 2018 This paper addresses a biobjective production‐distribution planning problem. The problem is formulated as a mixed integer programming problem with two objectives. The objectives are to minimize the total costs and to balance the total workload of the supply chain, which consist of plants and depots, considering that it represents a company vertically ...
Martha-Selene Casas-Ramírez +5 more
wiley +1 more source
Vocational guidance in childhood and career aspirations by gender [PDF]
, 2018 The aim of this work is to identify the areas of study and the factors that children take into account to choose their career or occupation aspirations.
Caldera Montes, Juan Francisco +2 more
core +2 more sources
Mathematical Problems in Engineering, Volume 2018, Issue 1, 2018., 2018 During the design of nonimaging Fresnel lenses, the reflectance losses at the refracting surfaces should be taken into account because, depending on the parameters of each prism, semiacceptance angle θin and output angle θout, these losses can decrease the total efficiency of the lens.
Perla M. Viera-González +4 more
wiley +1 more source