Given a square matrix A, a Brauer's theorem [Brauer A., Limits for the characteristic roots of a matrix. IV. Applications to stochastic matrices, Duke Math. J., 1952, 19(1), 75-91] shows how to modify one single eigenvalue ...
Domingo, Luis R.; Sáez Cases, José Antonio; Perez, Patricia(Elsevier, 2007-04-20)
[EN] The electrophilicity index, omega, of a series of substituted ethylenes used in some relevant organic reactions has been evaluated from the ionization potential JP) and the electron affinity (EA) computed by vertical ...
Pesce, C.; Blasco-Gimenez, Ramon; Riedemann, J.; Andrade, I.; Peña, R.(Institute of Electrical and Electronics Engineers (IEEE), 2016-09)
[EN] This paper proposes a DC-DC power converter topology based on a modified Flyback Converter (FC). The aim of the proposed topology is to increase the voltage gain by connecting the inputs of N isolated FCs in parallel ...
García, José; Yepes, V.; Martí Albiñana, José Vicente(MDPI AG, 2020-04)
[EN] The counterfort retaining wall is one of the most frequent structures used in civil engineering. In this structure, optimization of cost and CO2 emissions are important. The first is relevant in the competitiveness ...
[EN] A multilevel modular DC DC power conversion topology based on cascaded H-Bridge converters in a double II configuration is presented. The topology is intended to interconnect large power DC networks. A two level control ...
In this paper a probabilistic economic dispatch model considering thermal units (fuel generators), photovoltaic
arrays and wind energy conversion systems is proposed. Wind speed, solar radiation and power
demand are ...
Architecting mobile collaborative applications has always been a challenge for designers. However, counting on a structural design as a reference can help developers to reduce risks and efforts involved in system design. ...
[EN] Air temperature records are acquired by networks of weather stations which may be several kilometres apart. In complex topographies the representativeness of a meteorological station may be diminished in relation to ...
[EN] The optimization methods and, in particular, metaheuristics must be constantly improved to reduce execution times, improve the results, and thus be able to address broader instances. In particular, addressing combinatorial ...
[EN] Evidence exists for the application of lean management practices in the design process. However, there is no systematic review of this type of practice that links the design management practices to the lean construction ...
Alba, Jesus; Arenas, Jorge P.; Rey Tormos, Romina María del; Rodríguez-Vercher, Juan-Carlos(Elsevier, 2019)
[EN] In this paper, a method for measuring the airflow resistivity of air-saturated porous sound-absorbing materials is presented. The method is based on a modification of the previous device developed by Dragonetti et al. ...
Herrera, Rodrigo F.; Mourgues, Claudio; Alarcón, Luis F.; Pellicer, Eugenio(American Society of Civil Engineers, 2021-04)
[EN] There is a beneficial effect when integrating Building Information Modeling (BIM) with lean practices to identify and reduce waste in the construction industry. According to experts, it is possible to improve the ...
Del Campo-Hitschfeld, María Luisa; Arenas, Nicolás; Rivera, Marco; Ballesteros-Pérez, Pablo(MDPI AG, 2023-04-23)
[EN] Deciduous trees are well known for controlling solar gains in buildings, contributing to energy savings in a sector that consumes 35% of global energy. However, there is still a lack of information about the real ...
Fernández-Puratich, Harald; Rebolledo-Leiva, Ricardo; Hernández, Diógenes; Gómez-Lagos, Javier; Armengot-Carbó, Bruno; Oliver Villanueva, José Vicente(Elsevier, 2021-10-15)
[EN] This research analyses and proposes an optimization model for the supply of biomass to a combined heat and power (CHP) system with a supply of different biomasses at a local level under Mediterranean conditions. The ...
Rojas, María José; Herrera, Rodrigo F.; Mourgues, Claudio; Ponz-Tienda, José Luis; Alarcón, Luis F.; Pellicer, Eugenio(Hindawi Limited, 2019-06-09)
[EN] The evaluation of BIM capabilities and repeatability enables a company or project to identify its current status and how to improve continuously; this evaluation can be performed with BIM maturity models. However, ...
Yepes, V.; Martí Albiñana, José Vicente; García, José(MDPI AG, 2020-04)
[EN] The optimization of the cost and CO 2 emissions in earth-retaining walls is of relevance, since these structures are often used in civil engineering. The optimization of costs is essential for the competitiveness of ...
[EN] There is qualitative evidence showing that design teams that use BIM-lean management have a higher level of interaction than design teams that do not use this management approach. However, there is no quantitative ...
García-Todolí, Salvador; Iglesias Rey, Pedro Luís; Mora Melia, Daniel; Martínez-Solano, F. Javier; Fuertes-Miquel, Vicente S.(MDPI AG, 2018-10)
[EN] The analysis of transient flow is necessary to design adequate protection systems that
support the oscillations of pressure produced in the operation of motor elements and regulation.
Air valves are generally used in ...
[EN] In Latin America, there is a wide gap between kilometers of paved ways and those with no type of protection. This situation is worse in rural areas, limiting development opportunities and inhabitants' quality of life. ...
The objective of this work was to study the influence of small variations in the chemical structure on the molecular dynamics of liquids using as models bis(cyclohexylmethyl) 2-methyl- and dicyclohexyl 2-methylsuccinate. ...