Patents Assigned to Ecole Polytechnique
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Patent number: 12647611Abstract: A computer-implemented method of machine-learning. The method includes obtaining a training dataset of 3D models of real-world objects. The method further includes learning, based on the training dataset and on a patch-decomposition of the 3D models of the training dataset, a finite codebook of quantized vectors and a neural network. The neural network comprises a rotation-invariant encoder. The rotation-invariant encoder is configured for rotation-invariant encoding of a patch of a 3D model into a quantized latent vector of the codebook. The neural network further includes a decoder. The decoder is configured for decoding a sequence of quantized latent vectors of the codebook into a 3D model. The sequence corresponds to a patch-decomposition. This constitutes an improved solution for 3D model generation.Type: GrantFiled: January 16, 2024Date of Patent: June 2, 2026Assignees: DASSAULT SYSTEMES, ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Mariem Mezghanni, Kawtar Zaher, Malika Boulkenafed, Maks Ovsjanikov
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Publication number: 20260118299Abstract: A computer-implemented method for determining a quantum phase parameter characterizing a property of a quantum phase of a solid-state material sample, which comprises determining, for a bath site of an impurity-bath model of the solid-state material sample, respective parameters Vp and ?p of the bath site, where Vp represents a coupling strength of the bath site, and ?p represents an energy of the bath site, configuring a quantum circuit for computing a Green's function of the solid-state material sample corresponding to the impurity-bath model, wherein one or more quantum gates of the quantum circuit are configured based on the determined respective parameters Vp and ?p, wherein the quantum circuit is configured to use one or more noisy qubits, wherein respective noise patterns of the noisy qubits are used to represent dissipation of the impurity-bath model; and executing, on a quantum computer, the quantum circuit to determine an estimate of the quantum phase parameter.Type: ApplicationFiled: October 24, 2025Publication date: April 30, 2026Applicants: BULL SAS, ECOLE POLYTECHNIQUEInventors: Thomas AYRAL, Corentin BERTRAND, Pauline BESSERVE, Michel FERRERO
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Publication number: 20260087208Abstract: A computer-implemented method of applying a machine-learning function preconfigured for taking an input 3D layout and a given noise level, and for predicting an output 3D layout. The function is preconfigured with a conditioning drop-out with respect to at least one layout parameter. The method further comprises obtaining a set of conditioning inputs and, for each conditioning input, determining one or more conditioning candidate 3D layouts and determining a plurality of perturbed conditioning candidate 3D layouts. The method further includes, applying the preconfigured function to each perturbed conditioning candidate, in which the one layout parameter is dropped out, computing reconstruction errors, and averaging the reconstruction errors, thereby obtaining a score. This forms an improved solution for predicting 3D layouts.Type: ApplicationFiled: September 23, 2025Publication date: March 26, 2026Applicants: DASSAULT SYSTEMES, Ecole PolytechniqueInventors: Léopold MAILLARD, Tom DURAND, Maks OVSJANIKOV
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Patent number: 12581208Abstract: A plenoptic imaging device for forming an image of the light field of an object, includes a sample holder suitable for holding the object; a main optical assembly, arranged to focus rays of the light field of the object, at a distance z0, referred to as the object distance, from the sample holder, which distance is smaller than an object focal distance f1 from the main optical assembly so as to form an intermediate optical image (Iv) of the object in an intermediate image plane at a distance z1 from the optical assembly; an assembly for sampling the light field, which assembly is suitable for acquiring spatiodirectional information on the rays forming the virtual image and for forming the image of the light field.Type: GrantFiled: October 5, 2022Date of Patent: March 17, 2026Assignees: ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHE SCIENTIFIQUE, ECOLE NATIONALE SUPERIEURE DE TECHNIQUES AVANCESInventor: Philippe Zeitoun
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Patent number: 12534796Abstract: A process for producing nanoclusters of silicon and/or germanium exhibiting a permanent magnetic and/or electric dipole moment for adjusting the work function of materials, for micro- and nano-electronics, for telecommunications, for “nano-ovens”, for organic electronics, for photoelectric devices, for catalytic reactions and for fractionation of water.Type: GrantFiled: December 4, 2020Date of Patent: January 27, 2026Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, ECOLE POLYTECHNIQUE, UNIVERSITE D'ORLEANSInventors: Holger Vach, Fatme Jardali, Yvan Bonnassieux, Laïfa Boufendi
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Patent number: 12527516Abstract: A method of quantifying progression of pregnancy, includes a) illuminating a uterine cervix with polarized light having a wavelength comprised between 600 and 1100 nm; b) acquiring a plurality of images of the illuminated uterine cervix through a polarization state analyser in respective analysing states; steps a) and b) being performed either once or a plurality of time using polarized light having different polarization states; c) from the acquired images, computing a depolarization parameter over a region of interest of the uterine cervix; and d) quantifying the progression of the pregnancy from said depolarization parameter. An apparatus, based on a colposcope fitted with a controllable polarization state generator, a controllable polarization state analyser and a suitably-programmed computer, for carrying out such a method. A computer program for carrying out such a method.Type: GrantFiled: June 29, 2020Date of Patent: January 20, 2026Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, ECOLE POLYTECHNIQUE, CHU BRUGMANNInventors: Angelo Pierangelo, Jérémy Vizet, Jean Rehbinder, André Nazac
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Publication number: 20250380909Abstract: A method implemented by a computer for characterizing at least one observation y of a subject, including the steps of determining a template y characterizing a population of subjects without anomaly, by diffeomorphic deformation, minimizing the cost function J: J(F,A)=K?y?F(y)?A?2+??A?1+Reg(F) where F is a deformation function, A is an anomaly matrix, ?A?1 is the 1-norm of A, K and ? are predefined constants, Reg is a regularization function, where during minimization, F and A are determined by learning, F providing information on the morphological variability of the subject and A providing information on anomalies in the observation y.Type: ApplicationFiled: June 20, 2023Publication date: December 18, 2025Applicants: ASSISTANCE PUBLIQUE HOPITAUX DE PARIS, UNIVERSITE PARIS CITE, ECOLE POLYTECHNIQUE, INSTITUT NATIONAL DE RECHERCHE EN INFORMATIQUE ET EN AUTOMATIQUEInventors: Tom BOEKEN, Vianney DEBAVELAERE, Jean FEYDY, Stéphanie ALLASSONNIERE, Olivier PELLERIN, Marc SAPOVAL
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Patent number: 12483190Abstract: A lifetime optimization method for a two-sided photovoltaic module, which includes at least one multi-junction stack, where the stack's first junction layer is on the module's first side, which is exposed to the sun at the beginning of the module's life in the module's base position, and the stack's last junction layer is arranged under the module's second side, which receives diffused and reflected light and light passed through the stack. The method includes measuring the full module's output power (PFM); calculating an estimated output power for the last junction layer (PLL) as a function of the first irradiance in the module's turned over position, where the second side becomes its upper side; comparing the estimated PLL with the PFM when the first side is the upper side and recommending turning over the module when the base position's PFM becomes less than the turned over position's estimated PLL.Type: GrantFiled: July 6, 2022Date of Patent: November 25, 2025Assignees: ELECTRICITE DE FRANCE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE—CNRS—, ECOLE POLYTECHNIQUE, TOTALENERGIES ONETECH, INSTITUT PHOTOVOLTAIQUE D'ILE DE FRANCE (IPVF)Inventors: Jean-Baptiste Puel, Arthur Julien
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Patent number: 12470167Abstract: A method for maximizing the current produced by a bifacial photovoltaic solar module including a plurality of cells, each having at least two stacked and series-connected junctions, the module being capable of orientation and including a device for driving its orientation with respect to the sun. The method includes an algorithm including measuring the module's irradiance at the upper face (Ai) on its upper photoactive face, reflective irradiance (Ar) on its lower photoactive face in its initial orientation, and initial current I from the irradiances Ai and Ar, and calculating currents Ijg generated by the stacked junctions from the cells' physical characteristics and I, calculating an optimized theoretical orientation for which equalization and maximization of the theoretical currents Ijtmax is obtained, and positioning the module in the theoretical orientation when an imbalance between Ijtmax and Ijg is greater than a threshold value dIjmax. A module designed for this method.Type: GrantFiled: July 5, 2022Date of Patent: November 11, 2025Assignees: INSTITUT PHOTOVOLTAIQUE D'ILE DE FRANCE (IPVF), ELECTRICITE DE FRANCE, TOTALENERGIES ONETECH, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE-CNRS-, ECOLE POLYTECHNIQUEInventors: Jean-Baptiste Puel, Arthur Julien
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Patent number: 12407294Abstract: A method for optimizing an existing generator system based on photovoltaic cells and provided with an existing photovoltaic panel or a group of existing photovoltaic panels, each panel having a first plurality of cells of a first type interconnected in series or in series/in parallel. The method includes: determining an operating voltage of the panel(s); producing additional panel module(s) having a second plurality of thin-film cells of a second type and having a different band gap width than the cells of the panel(s), the additional module(s) being configured to supply an operating voltage equal, within ±10%, to the voltage of the panel(s); positioning the additional module to overlap on or under the panel or one of the panel(s), the module being connected in parallel to the panel(s), or positioning several additional modules to overlap on or under several panels, the several modules being connected in parallel to panels.Type: GrantFiled: November 19, 2021Date of Patent: September 2, 2025Assignees: ELECTRICITE DE FRANCE, INSTITUT PHOTOVOLTAIQUE D'ILE DE FRANCE (IPVF), CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE—CNRS, TOTALENERGIES SE, ECOLE POLYTECHNIQUEInventors: Sébastien Jutteau, Pierre-Philippe Grand, Cédric Guerard, Etienne Drahi
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Patent number: 12399124Abstract: A process for ultrasensitive in vitro detection and/or quantification of a substance of interest in a sample is performed by detecting the luminescence emission by photoluminescent inorganic nanoparticles. The process includes (i) use of photoluminescent particles comprising a photoluminescent inorganic nanoparticle consisting of a crystalline matrix having at least 103 rare-earth ions, and coupled to a targeting agent for the substance to be analyzed, under conditions conducive to their association with the sample substance to be analyzed; (ii) exciting the rare-earth ions of the particles by an illumination device having a power of at least 50 mW and an excitation intensity of at least 1 W/cm2; (iii) detecting the luminescence emission by the particles after single-photon absorption; and (iv) determining the presence and/or concentration of the substance by interpreting said luminescence measurement. This process can be used for in vitro diagnostic purposes and as an in vitro diagnostic kit.Type: GrantFiled: August 3, 2018Date of Patent: August 26, 2025Assignees: ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Pascal Preira, Maximilian Richly, Cédric Bouzigues, Antigoni Alexandrou, Thierry Gacoin
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Patent number: 12396619Abstract: A system for polarimetric characterization of a target that includes a liquid light guide (LLG) for propagating light from a light source to the target (S) at least one of a Polarization State Analyzer (PSA) serving to analyze polarization of light having propagated into the LLG and that has been reflected by the target, and a Polarized State Generator (PSG) for modulating the polarization of light injected into the LLG, an optical detector for detecting light backscattered by the target (S) that has been illuminated by the LLG.Type: GrantFiled: February 4, 2021Date of Patent: August 26, 2025Assignees: ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Angelo Pierangelo, Arvid Olof Lindberg
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Publication number: 20250160327Abstract: Herbicides useful for controlling the proliferation of undesired plants. In particular, the use of at least one compound derived from chromene or chromane as a herbicidal agent, a phytotoxic composition including the at least one compound derived from chromene or chromane, as well as a method for treating and/or controlling plants using the at least one compound derived from chromene or chromane.Type: ApplicationFiled: February 15, 2023Publication date: May 22, 2025Applicants: ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, SORBONNE UNIVERSITE, ECOLE NATIONALE SUPERIEURE DE TECHNIQUES AVANCEESInventors: Bastien NAY, Emmanuel Alain, Simon BAUDOUIN, Bruce WALTERS, Simon Michel THUILLIER
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Publication number: 20250164402Abstract: A method and device for determining effective electron lifetime in a component to be analysed, including emitting an excitation light beam with pulses, detecting a photoluminescence light emitted by the component in response to the excitation light beam, and for each of said pulses of the excitation light beam, calculating an effective electron lifetime value based on a temporal shift between this pulse and a corresponding pulse of the photoluminescence light.Type: ApplicationFiled: November 15, 2024Publication date: May 22, 2025Applicants: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, INSTITUT PHOTOVOLTAIQUE D'ILE DE FRANCE, ELECTRICITE DE FRANCE, TOTALENERGIES ONETECH, ECOLE POLYTECHNIQUEInventor: Mateusz POPLAWSKI
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Publication number: 20250154122Abstract: The synthesis of chemical compounds having a dihydrobenzoxepine structure. In particular, a process for preparing chemical compounds having a 2,5-dihydro-benzoxepine structure by photochemical rearrangement from chemical compounds having a chromene structure. The process including a step of irradiating with ultraviolet radiation a solution in a solvent of the chemical compounds having a chromene structure.Type: ApplicationFiled: February 15, 2023Publication date: May 15, 2025Applicants: ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, SORBONNE UNIVERSITE, ECOLE NATIONALE SUPERIEURE DE TECHNIQUES AVANCEESInventors: Bastien NAY, Bruce WALTERS, Simon Michel THUILLIER
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Patent number: 12241733Abstract: A device for measuring an angular inclination and angular inclination fluctuations of an electromagnetic radiation beam is adapted to detect the incidence angular inclination and the relative fluctuations with respect to a nominal axis of propagation of the beam, in a desired detection plane including the nominal propagation axis. A system and a method for measuring an angular inclination and angular inclination fluctuations of an electromagnetic radiation beam uses the device for measuring an angular inclination and angular inclination fluctuations of an electromagnetic radiation beam. A method measures a spatial shift of a focused laser beam, at the focusing point, with respect to a reference optical axis.Type: GrantFiled: November 5, 2020Date of Patent: March 4, 2025Assignee: ECOLE POLYTECHNIQUEInventors: Simone Cialdi, Daniele Ernesto Cipriani, Stefano Capra, François Mathieu, Zeudi Mazzotta
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Publication number: 20250055418Abstract: A process for maximum power point tracking of a photovoltaic module, which includes monitoring the module's degradation by: for a periodicity n1?t0 with n1>1 constant or variable, steps of measuring parameters I and V of the module for points offset in voltage voltage VMPP+? and VMPP?? over the curve I(V) relative to the maximum power point MPP, calculating the slope dI/dV+ at the point VMPP+? and the slope dI/dV? at the point and VMPP?? and recording of the data with the MPP; for a periodicity n2?t0 with n2?n1 of > of steps of measuring values I and V by sweeping the curve I(V) and calculating and storing the module's parameters and values; one or several steps of calculating, tracing and displaying of (p/2) curves of data pairs based on p measured and calculated parameters; and one or more steps of detecting degradation from the measured and calculated parameters.Type: ApplicationFiled: December 16, 2022Publication date: February 13, 2025Applicants: ELECTRICITE DE FRANCE, INSTITUT PHOTOVOLTAIQUE D'ILE DE FRANCE (IPVF), TOTALENERGIES ONETECH, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE - CNRS -, ECOLE POLYTECHNIQUEInventors: Jean-Baptiste PUEL, Arthur JULIEN, Jean-François GUILLEMOLES
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Patent number: 12193443Abstract: The invention relates to the use, as a herbicide, of at least one compound chosen from the compounds of general formula (I) and organic or inorganic salts thereof and isomers thereof. The invention also relates to a phytotoxic composition and to a method for controlling the development of and/or treating undesirable plants on the surface of a target zone.Type: GrantFiled: March 16, 2020Date of Patent: January 14, 2025Assignees: ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, SORBONNE UNIVERSITEInventors: Bastien Nay, Emmanuel Baudouin, Wei Zhang
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Publication number: 20240322746Abstract: A method for maximizing the current produced by a bifacial photovoltaic solar module including a plurality of cells, each having at least two stacked and series-connected junctions, the module being capable of orientation and including a device for driving its orientation with respect to the sun. The method includes an algorithm including measuring the module's irradiance at the upper face (Ai) on its upper photoactive face, reflective irradiance (Ar) on its lower photoactive face in its initial orientation, and initial current I from the irradiances Ai and Ar, and calculating currents Ijg generated by the stacked junctions from the cells' physical characteristics and I, calculating an optimized theoretical orientation for which equalization and maximization of the theoretical currents Ijtmax is obtained, and positioning the module in the theoretical orientation when an imbalance between Ijtmax and Ijg is greater than a threshold value dIjmax. A module designed for this method.Type: ApplicationFiled: July 5, 2022Publication date: September 26, 2024Applicants: INSTITUT PHOTOVOLTAIQUE D'ILE DE FRANCE (IPVF), ELECTRICITE DE FRANCE, TOTALENERGIES ONETECH, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE - CNRS -, ECOLE POLYTECHNIQUEInventors: Jean-Baptiste PUEL, Arthur JULIEN
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Publication number: 20240316477Abstract: The present invention relates to a method of monitoring a system, comprising the following steps: i. obtaining time series describing the temporal evolution of a parameter of a system between an initial and a final time, the final time being triggered by the occurrence of an abnormal event affecting the system, ii. for each time series, defining an abnormal time period and a normal time period, iii. for each time series, determining a metric characterizing each parameter of the series under consideration over the abnormal time period and over the normal time period, iv. determining association rules on the basis of the characterizing metrics, v. validating the obtained association rules, and vi. the predicting the occurrence or lack of occurrence of an abnormal event liable to affect a system to be monitored on the basis of the validated association rules.Type: ApplicationFiled: July 1, 2022Publication date: September 26, 2024Applicants: TotalEnergies OneTech, ECOLE POLYTECHNIQUE, Centre national de la recherche scientifiqueInventors: Amin DHAOU, Antoine BERTONCELLO, Sébastien GOURVÉNEC, Josselin GARNIER, Erwan LE PENNEC