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Yverdon-les-Bains, Switzerland

Prina Howald E.,HEIG VD | Odier M.,Geotechnique appliquee Deriaz
Rock Mechanics in Civil and Environmental Engineering - Proceedings of the European Rock Mechanics Symposium, EUROCK 2010 | Year: 2010

The publication refers to the rehabilitation of a water diversion tunnel of the streamletVengeron in Geneva. The construction includes a section of 100m drilled and blasted gallery. The swelling behavior of the rock has gradually led to local collapse. The rehabilitation works were carried out in especially difficult conditions since there is no bypass opportunity. The watershed is highly urbanized; the risk of severe flooding was an important parameter in planning the work. © 2010 Taylor & Francis Group. Source

Maalouf E.,University of Applied Sciences and Arts Western Switzerland | Di Zuzio M.,HEIG VD | Sokhn M.,University of Applied Sciences and Arts Western Switzerland
ACM International Conference Proceeding Series | Year: 2014

Business Process Management (BPM) is accepted to be an efficient approach to capture processes in order to improve operational aspects of an enterprise. Business process modeling and design is the first step in BPM. This paper presents a process fragmentation approach that serves to generate process fragments ready for reuse during modeling in a semantic modeling tool. The fragmentation is based on the Refined Process Structure Tree which is an algorithm to decompose processes based on their workflow graphs. Copyright © 2014 ACM. Source

Melab N.,French Institute for Research in Computer Science and Automation | Van Luong T.,HEIG VD | Boufaras K.,French Institute for Research in Computer Science and Automation | Talbi E.-G.,French Institute for Research in Computer Science and Automation
GECCO 2013 - Proceedings of the 2013 Genetic and Evolutionary Computation Conference | Year: 2013

In this paper, we propose a pioneering framework called Par-adisEO-MO-GPU for the reusable design and implementation of parallel local search metaheuristics (S-Metaheuris-tics) on Graphics Processing Units (GPU). We revisit the ParadisEO-MO software framework to allow its utilization on GPU accelerators focusing on the parallel iteration-level model, the major parallel model for S-Metaheuristics. It consists in the parallel exploration of the neighborhood of a problem solution. The challenge is on the one hand to rethink the design and implementation of this model optimizing the data transfer between the CPU and the GPU. On the other hand, the objective is to make the GPU as transparent as possible for the user minimizing his or her involvement in its management. In this paper, we propose solutions to this challenge as an extension of the ParadisEO framework. The first release of the new GPU-based Par-adisEO framework has been experimented on the permuted perceptron problem. The preliminary results are convincing, both in terms of flexibility and easiness of reuse at implementation, and in terms of efficiency at execution on GPU. Copyright © 2013 ACM. Source

Romero C.,Ecole Polytechnique Federale de Lausanne | Rachidi F.,Ecole Polytechnique Federale de Lausanne | Paolone M.,Ecole Polytechnique Federale de Lausanne | Rubinstein M.,HEIG VD
IEEE Transactions on Power Delivery | Year: 2013

This paper presents statistical distributions of lightning current parameters based on the lightning current and current-derivative waveforms measured at the Säntis Tower site in 2010 and 2011. The total number of flashes analyzed in this study was 167, which includes nearly 2000 pulses. The statistical distributions refer to upward negative flashes. It is shown that negative flashes are mainly concentrated in the summer months during the convective season. Statistical data on the salient lightning current parameters, namely, peak current, peak current derivative, risetime, pulse charge, pulse duration, interpulse interval, and flash multiplicity are presented and discussed. The obtained data that constitute the largest dataset available to this date for upward negative flashes are also compared with other available statistical distributions. © 1986-2012 IEEE. Source

Hashemi A.,Isfahan University of Technology | Kalantari M.,School of Engineering in Information and Communication Science and Technology | Kasser M.,HEIG VD
Applied Mathematics and Information Sciences | Year: 2013

In this paper, we propose a new algorithm to solve the 7 parameters transformation problem. Using Gröbner bases techniques and solving polynomial systems, we find, in a direct manner and without the need of a linearization, the values of the translation, rotation and a scale factor. Then, with the aid of simulated data, we will confront the algorithm to all sorts of configurations. Finally, we show the application of this algorithm in photogrammetry. © 2013 NSP Natural Sciences Publishing Cor. Source

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