Browsing by Title Facultad de Ciencias Físicas y Matemáticas
Now showing items 14357-14376 of 20342
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(Sage, 2020)A solution strategy based on integer linear programming models has been developed for leaf sweeping operations in the Argentine city of Trenque Lauquen. The aim is to achieve efficiency in the assignment of sweepers to ...
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(2012-02)We present a methodology for long-term mine planning based on a general capacitated multicommodity network flow formulation. It considers underground and open-pit ore deposits sharing multiple downstream processing plants ...
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(John Wiley & Sons, 2013)When a company decides to outsource a service, the most important reasons for doing so usually are to focus on core business, to be able to access high-quality services at lower costs, or to benefit from risk sharing. ...
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(Southern African Inst Mining Metallurgy, 2016-07)A crucial problem in the open pit mining industry is to determine the optimal block scheduling, defining how the orebody will be sequenced for exploitation. An orebody is often comprised of several thousand or million ...
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(2013)Salmon farming in Chile constitutes one of the nation's principal food exporting sectors. In the seawater stage, one of the most important in the farm production chain, salmon are cultivated in floating cages fitted with ...
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Optimizing the ENAP's systems for distributing refined petroleum products by tankers and pipelines (Universidad de Chile, 2017)This thesis is compused by two research projects developed at Empresa Nacional del petroleo, ENAP. In the first part of this thesis we present an optimization framework for determining the optimal schedule for a fleet of ...
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(Elsevier B.V., 2019)© 2019 This paper describes the creation, development, implementation and impact of a system optimizing the distribution of petroleum products by pipeline at Empresa Nacional del Petroleo, the state-owned oil company in ...
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(Elsevier, 2020)The SART (Sulfidization, Acidification, Recycling and Thickening) process has been successfully installed to recover cyanide and copper in seven worldwide gold cyanidation plants in the last 15 years. This technology has ...
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(Elsevier, 2020)The problem studied in this paper is that of designing the optimal open pit haulage ramp that, for a given ramp width and a maximum ramp gradient, connects two points of the mine, minimising construction and operational ...
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(Universidad de Chile, 2012)Currently, mine plans are optimized by using many criteria, such as profit, life of mine, concentration of some pollutants, mining costs, confidence level or mineral resources, while attending constraints related to ...
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(Academic Press Inc., 2019)The design of effective incentive schemes that are both successful in motivating employees and keeping down costs is of critical importance. Research has demonstrated that prosocial incentives, where individuals’ effort ...
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(Ediciones Doyma, S.L., 2020)
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(EDP Science, 2020)Context. Detecting and characterizing substellar companions for which the luminosity, mass, and age can be determined independently is of utter importance to test and calibrate the evolutionary models due to uncertainties ...
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(IOP Publishing Ltd., 2017)We present orbital elements and mass sums for 18 visual binary stars of spectral types B to K (five of which are new orbits) with periods ranging from 20 to more than 500 yr. For two double-line spectroscopic binaries with ...
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(ESO, 2016-03)Aims. We present new astrometric measurements of the components in the T Tauri system and derive new orbits and masses. Methods. T Tauri was observed during the science verification time of the new extreme adaptive ...
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(Oxford University Press, 2019)© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.New data obtained during the 2018 March-April speckle run at the 4.1 m Southern Astrophysical Research (SOAR) telescope ...
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(Canadian Mathematical Society, 2015)We prove that quasiconvex functions always admit descent trajec- tories bypassing all non-minimizing critical points.
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(Universidad de Chile, 2013)Esta tesis se dedica al estudio de las fluctuaciones de densidad, orden y de capilaridad en la vecindad de una transición de fase granular tipo sólido-líquido que ocurre en una monocapa granular vibrada de geometría ...
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(ELSEVIER SCIENCE, 2003-11-15)We consider a discrete-time ergodic Markov chain on a partially ordered state space and study the stochastic comparison between its invariant measure and some measures related with the behaviour of the chain conditioned ...
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(Tech Univ Braunschweig, 2016)Our goal is to show that the standard model-theoretic concept of types can be applied in the study of order-invariant properties, i.e., properties definable in a logic in the presence of an auxiliary order relation, hut ...
