Optimal sensor placement for classifier-based leak localization in drinking water networks

© 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.This paper presents a sensor placement method for classifier-based leak localization in Water Distribution Networks. The proposed approach consists in applying a Genetic Algorithm to decide the sensors to be used by a classifier (based on the k-Nearest Neighbor approach). The sensors are placed in an optimal way maximizing the accuracy of the leak localization. The results are illustrated by means of the application to the Hanoi District Metered Area and they are compared to the ones obtained by the Exhaustive Search Algorithm. A comparison with the results of a previous optimal sensor placement method is provided as well.Postprint (author's final draft

Los efectos sociales del deporte : ocio, integración, socialización, violencia y educación

Documento de trabajo que muestra una aproximación multidisciplinaria de las ciencias sociales al fenómeno del deporte. Es una reflexión sobre la dimensión social del deporte, desde los efectos que este produce en las formas de vida humana: integración, socialización o violencia. Se analiza también el papel del deporte como instrumento de educación.Document de treball que mostra una aproximació multidisciplinària de les ciències socials al fenomen de l'esport. És una reflexió sobre la dimensió social de l'esport, des dels efectes que aquest produeix en les formes de vida humana: integració, socialització o violència. S'analitza també el paper de l'esport com a instrument d'educació.Working paper showing a multidisciplinary approach of social sciences on sport's phenomenon. It is a reflection on the social dimension of the sport, from the effects that this produce in the forms of human life: integration, socialization or violence. They also analyze the paper of the sport as an education instrument

The effect of foreign service on trade volumes and trade partners

It has been emphasized that international promotion activities such as state visits or the presence of embassies, consulates and export promotion agencies help foster trade when there are search costs and/or uncertainty. In this paper we try to disentangle the differential effect that foreign service (embassies and consulates) has on both the establishment of trade links with countries, and the effect on trade volumes with already existing trading partners (the extensive and intensive margins at the country level). Using the estimation procedure suggested by Helpman, Melitz and Rubinstein (2007) and a cross-section of 21 exporters and 162 importers as in Rose (2005), we find that the presence of a foreign service office in a given country increases the probability of trading with that partner between 11% and 18%, but that it has no effect on the volume of trade with already existing trading partners. We then proceed to evaluate the importance of the extensive margin at the sectoral level, finding that these probabilities are substantially larger for more differentiated sector

Uncertainty and entry into export markets

It has been emphasized that international promotion activities such as state visits or the presence of embassies, consulates and export promotion agencies help foster trade when there are search costs and/or uncertainty. In this paper we try to disentangle the differential effect that foreign service (embassies and consulates) has on both the establishment of trade links with countries, and the effect on trade volumes with already existing trading partners (the extensive and intensive margins at the country level). Using the estimation procedure suggested by Helpman, Melitz and Rubinstein (2007) and a cross-section of 21 exporters and 162 importers as in Rose (2005), we find that the presence of a foreign service office in a given country increases the probability of trading with that partner between 11% and 18%, but that it has no effect on the volume of trade with already existing trading partners. We then proceed to evaluate the importance of the extensive margin at the sectoral level, finding that these probabilities are substantially larger for more differentiated sector

Pumps condition assessment in water distribution networks

Postprint (published version

Caracterización de la estructura fina de las fibras de poliamida 6 mediante la técnica de solubilidad diferencial

Se describe la puesta a punto de la técnica de solubilidad diferencial en mezclas fenol/isopropanol como parámetro de la estructura fina de las fibras de poliamida 6.Este parámetro ha permitido detectar diferencias entre sustratos de poliamida 6 del mismo tipo producidos por diferentes compañías. También se han apreciado diferencias de solubilidad diferencial en sustratos de poliamida 6 fabricados con diferentes relaciones de estirado. Los diferentes sustratos se han caracterizado tambiénprocediendo a medidas de cristalinidad (densidad) y orientación(módulo sónico)

Leak localization in water distribution networks using a mixed model-based/data-driven approach

“The final publication is available at Springer via http://dx.doi.org/10.1016/j.conengprac.2016.07.006”This paper proposes a new method for leak localization in water distribution networks (WDNs). In a first stage, residuals are obtained by comparing pressure measurements with the estimations provided by a WDN model. In a second stage, a classifier is applied to the residuals with the aim of determining the leak location. The classifier is trained with data generated by simulation of the WDN under different leak scenarios and uncertainty conditions. The proposed method is tested both by using synthetic and experimental data with real WDNs of different sizes. The comparison with the current existing approaches shows a performance improvement.Peer ReviewedPostprint (author's final draft