- Internship at the French National Institute for Transport and Safety Research (INRETS) [April 09 - September 09]
Title : Independent factor analysis for the diagnosis of a component of the railway infrastructure in a semi-supervised learning.
The overall objective of this research is to develop a diagnostic tool automatic for a system of the railway infrastructure: the track circuit. This system is composed of several sub-systems whose number is variable and the observations collected are spatially dependent. The goal is to estimate the severity of the failure of each subsystem, taking into account these peculiarities.
A diagnostic system based on generative models graphic was developed in the laboratory. A solution based on the Independent Factor Analysis (IFA) has been proposed where the observed variables are assumed to be derived from mixtures of latent variables, which are Gaussian mixtures. It remains to study the semi-supervised learning on track circuits with different sizes.
You may find my report and my defense in its full/printable version (in french).
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The skills at the Laboratory of New Technologies apply to the electromechanical aspects of guided transport, such as levitation, guidance and propulsion, with a technological approach of the innovative diagnosis components and methods on the one hand and a global approach of transport systems, especially guided systems on the other hand.
The research poles more precisely correspond to the following types of activities:
- Transport and energy conversion for electrical traction
- The dynamics of guided vehicles
- The diagnosis and maintenance of guided transport systems
- Urban and interurban guided transport systems
These research poles are oriented towards the sustainable development of public transport systems as a part of INRETS strategic axis "Sustainability and Environment".
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The French National Institute for Transport and Safety Research has been created by interministerial decree on September 18, 1985. INRETS is a state-financed scientific and technological body under the administrative supervision of the Ministries in charge of Research and Transport.
Axes and scientific domains
- Improve people safety
- Optimize the use of transport networks and reduce the dependency to oil: from mobility to land planning
- Increase reliability and sustainability of transport systems, optimize energy consumption and reduce the impact on the environment
INRETS is administered by a board of directors composed of nine representatives of the transport professions (manufacturers and operators), eight representatives of the ministries concerned, and four representatives of INRETS personnel.