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Designing Fresnel microlenses for focusing astigmatic multi-Gaussian beams by using fractional order Fourier transforms
(Institute of Physics Publishing, 2011)
According to a scalar theory of diffraction, light propagation can be expressed by two-dimensional fractional order Fourier transforms. Since the fractional Fourier transform of a chirp function is a Dirac distribution, ...
Ultrasound image enhancement: A review
(2012)
Medical ultrasound imaging uses pulsed acoustic waves that are transmitted and received by a hand-held transducer. This is a mature technology that it is widely used around the world. Among its advantages are that it is ...
Perceptions and experiences about Google News from the editors of Latin-American news media indexed in the editions of Colombia and Mexico
(Universidad Complutense de Madrid, 2018)
News outlets of all sizes and trajectories are added to news aggregation services on the Web such as Google News, a situation that has caused to conflicts between parties in various parts of the world, including Latin-America. ...
Strategic direction: Projection of technological innovation and administrative management in small enterprises
(Centro de Informacion Tecnologica, 2017)
The main objective of this research is to establish the level of innovation in technology and strategic direction of small and medium size enterprises (SMEs) in the city of Barranquilla, Colombia. For this purpose, a ...
Adoption barriers for electric vehicles: Experiences from early adopters in Sweden
(Elsevier Ltd, 2017)
Electric vehicles are considered as one of the most effective technologies for reducing current greenhouse gas emissions from the transport sector. Although in many countries, local and national governments have introduced ...
Energy consumption feedback devices' impact evaluation on domestic energy use
(Elsevier Ltd, 2013)
Household energy accounts for one of the major contributors to the countries energy balances. It has been shown, that an effective way to achieve energy saving in that sector, is by providing consumers with information and ...
On the use of the p-q theory for harmonic currents cancellation with shunt active filter
(VSB-Technical University of Ostrava, 2019)
Discussion and mathematical proof on necessary and sufficient conditions for the application of the p-q theory for compensating the harmonic currents consumed by non-linear load using a shunt active filter are presented. ...
Distributed energy resources integration in AC Grids: A family of passivity-based controllers
(Universitat Politecnica de Valencia, 2019)
This paper presents the design and application of passivity-based control theory for distributed energy resources (DERs) integration through voltage source converters (VSC) in ac single-phase grids. The Hamiltonian ...
Optimal Power Flow on DC Microgrids: A Quadratic Convex Approximation
(Institute of Electrical and Electronics Engineers Inc., 2019)
This express brief shows a convex quadratic approximation for the optimal power flow (OPF) in direct-current microgrids (dc-μ Grid) via Taylor's series expansion. This approach can be used for solving OPF problems on radial ...
Solution of the optimal power flow problem in direct current grids applying the hurricane optimization algorithm
(2019-09-24)
The Colombian electrical power system is being transformed by the large-scale integration of energy storage systems and renewable energy resources to the power system. These technologies can be integrated using alternating ...
Universidad Tecnológica de Bolívar - 2017 Institución de Educación Superior sujeta a inspección y vigilancia por el Ministerio de Educación Nacional. Resolución No 961 del 26 de octubre de 1970 a través de la cual la Gobernación de Bolívar otorga la Personería Jurídica a la Universidad Tecnológica de Bolívar.