Electricite De France

Centre National De La Recherche Scientifique-cnrs

Nicolas Paul

Laurent Lombez

Denis Vautrin

Paul Kassis

Stephanie Dubost

Charlotte Gauchet

Antoine De Chillaz

Nicolas Bousquet

Kersane Zoubert-Ousseni

Eric De Oliveira

Pierre-Louis Filiot

Bruno Renard

Joseph Mure

Loïc Vallance

Daniel Ory

Stéphanie Dubost

A method for processing data in a video sequence comprising impulse noise ('salt-and-pepper', 'snow', or other type), comprising, for filtering the noise, an application of a recursive filter (S), given by:()=(&#x2212;1)+&#x394; if()&#x3e;(&#x2212;1)()=(&#x2212;1)&#x2212;&#x394; if()&#x3c;(&#x2212;1)and()=(&#x2212;1) if()=(&#x2212;1)where: y(n) designates an element in the nimage of the succession, not processed by application of the sign filter; z(n&#x2212;1) designates an element having a position corresponding to y(n), in the (n&#x2212;1)image of the succession, and processed by application of the sign filter; z(n) designates an element having a position corresponding to y(n), in the nimage of the succession, and processed by application of said sign filter, and &#x394; is a strictly positive coefficient.

Processing of impulse noise in a video sequence

The invention concerns a method for the ultrasound detection and characterisation of defects in a heterogeneous material, comprising the following steps:

Method for the ultrasound detection and characterization of defects in a heterogeneous material

A method for assisting with the management of a pumping device capable of supplying a circuit of a power production facility with water taken from a natural watercourse is disclosed here. In particular, at least some parameters relating to a watercourse and having an influence on the quantity of materials liable to clog filters are collected. A statistical model is developed that is at least based on historical data for said parameters relating to the watercourse for which clogging of the filters has been observed. Current parameters relating to at least the watercourse are collected and said statistical model is used in conjunction with said current parameters to assess the risk of an influx of clogging materials, and an alert signal for deactivating the pumping device at a selected time is generated on the basis of the assessed risk.

Managing water-supply pumping for an electricity production plant circuit

The invention concerns a method for ultrasounds detection of defects in a material, including the following steps:

Method for detecting defects in a material by ultrasounds

A method for detecting and characterizing defects in a heterogeneous material via ultrasound. The method includes the following steps: emitting ultrasound waves from an emitting ultrasound transducer placed against the material; acquiring, using a receiving ultrasound transducer in various positions relative to the material, a plurality of time signals, representing the amplitude of the sound propagated in the material as a function of time, for a position of the receiving ultrasound transducer; determining a time function representing a spatially averaged power of the time signals that correspond to different positions of the receiving transducer; and&#x2014;normalizing the time signals by the time function so as to obtain normalized time signals. The defects in the material are detected from the normalized tune signal.

Method for detecting and characterizing defects in a heterogenous material via ultrasound

A method for estimating and forecasting an energy production indicator for a solar system. The method comprises, in particular, the steps of: a) receiving images of the sky taken from the ground, each image comprising an optical marker; b) extracting values of pixels and locating of image pixels from the received images; c) determining distances between the located pixels and the optical marker of the image; d) generating a vector of parameters from a pixel classification, according to the extracted values and the determined distances; e) comparing parameters of the generated vector with predetermined parameters, the predetermined parameters being respectively associated with energy production indicators; f) estimating the energy production indicator of the solar system from energy production indicators of the predetermined parameters compared to the generated vector.

Method for estimating and forecasting an energy production indicator for a solar system

A method for evaluating the clogging of the passages of a tube support plate of a tube heat exchanger, in which an eddy current probe is passed through a tube of the exchanger and a measurement signal is measured with the probe to evaluate the clogging at the downstream edge of a tube support plate. A lower (upper, respectively) edge signal corresponding to the probe passing the downstream (upstream, respectively) edge of the tube support plate is determined from the measurement signal. The impulse response of the probe is estimated. The lower edge signal is deconvolved () by the impulse response estimation. The clogging is evaluated () by analyzing () the lower edge signal thus deconvolved.

Method for evaluating the clogging of a heat exchanger

A method for determining positions of elements of fuel assemblies arranged in a nuclear vessel is described herein. According to an implementation, the method involves capturing a plurality of images of a nuclear vessel and using the plurality of images to estimate a first set of positions of S-holes of a fuel assembly of the nuclear vessel. The method further involves determining a value representative of differences between: (a) the distances from the estimated set of positions to a location on a face of the fuel assembly and (b) known actual distances between the S-holes and the location on the face of the fuel assembly.

Determination of positions of fuel assembly elements

Disclosed herein is a method for processing of successive digital image data, acquired by a camera immersed in a liquid comprising turbulence, such as water in a nuclear reactor core, this turbulence causing an effect of apparent displacement of pixels of the images. The processing comprises advantageously: a modelling of the effect of the turbulence on the pixels of the images, and a deconvolution by this modelling of a time-averaged image.

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Montreuil, France

Nicolas Paul