Results 21 to 30 of about 1,446 (82)
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
Ibersid: revista de sistemas de información y documentaciónSe analiza el impacto de los Acuerdos Transformativos en la Universidad Nacional Autónoma de México (UNAM) desde la perspectiva de la inclusión de las revistas núcleo de cada una de las entidades académicas que conforman este estudio.
Beatriz Juárez Santamaría +6 more
semanticscholar +1 more source
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
Quantum Cosmology of Quadratic f(R) Theories with a FRW Metric
Advances in Mathematical Physics, Volume 2017, Issue 1, 2017., 2017 We study the quantum cosmology of a quadratic f(R) theory with a FRW metric, via one of its equivalent Horndeski type actions, where the dynamic of the scalar field is induced. The classical equations of motion and the Wheeler‐DeWitt equation, in their exact versions, are solved numerically.
V. Vázquez-Báez +2 more
wiley +1 more source
Mathematical Problems in Engineering, Volume 2017, Issue 1, 2017., 2017 We address a logistics districting problem faced by a parcel company whose operations consist of picking up and delivering packages over a service region. The districting process aims to find a partition of the service region into delivery and collection zones that may be served by a single vehicle that departs from a central depot.
Rosa G. González-Ramírez +5 more
wiley +1 more source
Algebraic and toroidal representation of the genetic code
Frontiers in Applied Mathematics and StatisticsThe genetic code is a set of regulatory principles that control the translation of information encoded in messenger RNA (mRNA) into a sequence of amino acids.
Rodrigo Rodríguez-Gutiérrez +3 more
doaj +1 more source
Complexity, Volume 2017, Issue 1, 2017., 2017 The trajectory tracking task in a wheeled mobile robot (WMR) is solved by proposing a three‐level hierarchical controller that considers the mathematical model of the mechanical structure (differential drive WMR), actuators (DC motors), and power stage (DC/DC Buck power converters).
José Rafael García-Sánchez +8 more
wiley +1 more source
Noncontact Optical Fiber Sensor for Measuring the Refractive Index of Liquids
Journal of Sensors, Volume 2016, Issue 1, 2016., 2016 A noncontact optical fiber sensor for measuring the refractive index of transparent liquids is proposed. It operates by calculating the path of a focused laser beam at 635 nm that travels across the boundaries of a liquid sample. The optical power Fresnel reflections are detected and, subsequently, the refractive index is determined as the ratio ...
R. Selvas-Aguilar +8 more
wiley +1 more source
Space Weather, Volume 22, Issue 11, November 2024.Abstract On 10 May 2024, a severe geomagnetic storm coinciding with Mother's Day in Mexico lasted over 40 hr and produced polar auroras observable at low latitudes. This storm, the most intense since 2003, resulted from a series of solar flares and coronal mass ejections from active region 3664.
J. A. Gonzalez‐Esparza +26 more
wiley +1 more source
Bilevel Programming and Applications
Mathematical Problems in Engineering, Volume 2015, Issue 1, 2015., 2015 A great amount of new applied problems in the area of energy networks has recently arisen that can be efficiently solved only as mixed‐integer bilevel programs. Among them are the natural gas cash‐out problem, the deregulated electricity market equilibrium problem, biofuel problems, a problem of designing coupled energy carrier networks, and so forth ...
Vyacheslav V. Kalashnikov +5 more
wiley +1 more source