Abstract: A system for detecting a fault in a polyphase electrical network, characterized by the fact that it comprises a plurality of sensors distributed over the electrical network and suitable for measuring a parameter representative of the positive sequence voltage and/or the negative sequence voltage at each respective sensor and analyzing means suitable for analyzing the signals coming from the different sensors representative of the positive sequence voltage and/or the negative sequence voltage at each respective sensor, by searching for an extremum from among the signals coming from the sensors and for locating a fault at the sensor corresponding to this extremum.

Abstract: The invention relates to a method for non-destructive testing of an insulating sheath (G) of a cable (CB) made of a material of elastomeric polymer.

Abstract: A method for managing authentication of an equipment in a data communication system for exchange of data between the equipment and an application server of the system, the system including a first data communication network for using a first security function for securing data communication within the first network, operatively coupled to a second data communication network for using a second security function for securing data communication within the second network including, in an authentication management unit of the system implemented in a node of the second communication network: receiving an authentication request from the equipment according to the second security function for access to the application server; determining whether an equipment identifier in the first communication network was received further to receiving an authentication request from the equipment according to the first function; and, when the equipment identifier was not received, generating an authentication failure response for th

Abstract: Fabrication of a double-sided photovoltaic cell, with two opposite active surfaces, comprising a step of depositing, on each active surface, at least one electric contact. The deposition step comprises in particular a shared operation of depositing on each of the active surfaces, implemented by electrolysis in a shared electrolysis tank comprising: a first compartment for depositing a metal layer on a first active surface of the cell, for fabrication of a contact comprising said metal layer on the first active surface; and a second compartment for depositing, by oxidation, a metal oxide conductor layer on the second active surface of the cell, for the fabrication of a contact comprising said metal oxide layer on the second active surface.

Abstract: A method for exchanging electrical energy between a plurality of private electricity networks each comprising: a coordination unit, groups of electrical devices, and a plurality of relays arranged on the power supply lines of the devices. The method comprises: a) transmitting device status data from the devices to the coordination unit, b) establishing a set of electrical energy resources and requirements, c) comparing the set of resources and requirements with those of other private networks, d) allocating the requirements and resources to one another, e) ensuring at least part of the routing of electrical energy by means of digital certificates and instructions for drawing electrical energy that are sent to the relays, f) keeping record of each energy exchange in order to define a transaction between two private networks.

Abstract: The invention concerns a method for measuring a power (Pe, Pm) of an electric motor, that involves measuring a real current (I) of the motor, by means of a measurement sensor (11), the invention being characterised in that it involves inputting, on an interface (20), at least one piece of nominal power data (Pn), one piece of nominal speed data (Wn), one piece of nominal current data (In), one piece of nominal voltage data (Un), one piece of power factor data (cos ?) and the real current (I) of the engine, calculating, in the computer, a no-load current of the motor according to a first stored function depending on at least the data (Pn, In, Un, cos ?), calculating, in the computer, the active power (Pe) and/or the mechanical power (Pm) and/or the active energy and/or the mechanical energy according to at least one second stored function depending on at least the data (Pn, In), the real current (I) and the no-load current that has been calculated, and providing the power that has been calculated on an output

Abstract: The invention relates to a method for evaluation of fouling of passages of a spacer plate (10) of a tubular heat exchanger (11), wherein first, second and third pressure sensors (31, 32, 33) are arranged, the method comprising steps of: (a) during a transient operation phase of the heat exchanger determination of a value over time of Wide Range Level NGL, from the measurements of the first and third pressure sensors (31, 33), and of a value over time of Narrow Range Level NGE, from the measurements of the second and third pressure sensors (31, 33); (b) determination of a value over time of Steam Range Level deviation ?NGV, corresponding to the NGL from which a component representative of a variation of free water surface in the heat exchanger has been filtered, from the values of NGL and NGE; (c) comparison of the determined value of ?NGV with a set of reference profiles ?NGVi for said transient operation phase of the heat exchanger, each reference profile ?NGVi being associated with a level of fouling so

Abstract: The present invention relates to a multi-layer material comprising an assembly of layers, called “front layers”, capable of forming a front photovoltaic cell, and an assembly of layers, called “rear layers”, capable of forming a rear photovoltaic cell, wherein the front layer assembly and the rear layer assembly are electrically insulated by an insulating layer of epitaxial material.

Abstract: The invention relates to a device for detecting icing and de-icing of a wind turbine blade, characterized in that it comprises: a sensor, placed on the surface of a blade, and comprising a first so-called “receiving” antenna, a second so-called “emitting” antenna, and a frequency divider inserted between said first and second antennas; and an interrogator, configured to emit an electromagnetic wave towards the receiving antenna of said sensor, and to receive an electromagnetic wave from the emitting antenna of said sensor.

Abstract: The invention relates to a process for the preparation of a semiconductor material comprising at least one entirely monocrystalline semiconductor layer, said process comprising the steps of preparation of the surface of a first substrate to receive a monocrystalline silicon layer; deposition by Plasma-Enhanced Chemical Vapor Deposition (PECVD) of a layer of monocrystalline silicon by epitaxial growth with a growth rate gradient on the silicon layer monocrystalline obtained in step (i); and epitaxial growth of a monocrystalline layer of a semiconductor material on the monocrystalline silicon layer obtained in step (ii), to thus obtain a material comprising at least one entirely monocrystalline semiconductor layer. The invention also relates to a multilayer material comprising a monocrystalline layer of semiconductor material.

Abstract: A method for monitoring and detecting defects in a doubly-fed asynchronous machine including a stator and a rotor, said method implemented by computer means. The method comprises: a. receiving a current and a voltage measurement of the stator, and a measurement of relative rotation speed between the stator and the rotor; b. deducing a stat or power as a function of time; c. performing a harmonic analysis on the resulting stator power including applying a wavelet transform to the stator power; d. comparing the resulting harmonic representation to a reference harmonic representation, where said reference harmonic representation is selected as a function of the rotation speed measurement, so as to detect possible defects in said machine as a function of possible differences identified by the comparison.

Abstract: The invention relates to a flow calming assembly for a nuclear reactor comprising a vessel (2), an enclosure (5) located in the vessel (2), a fluid being circulated between the vessel (2) and the enclosure (5) in order to then circulate in the enclosure (5) after a reversal of its direction of circulation, a diffusion element (9) being configured to limit the formation of swirling flows in the enclosure (5) and make the distribution of the flow rates uniform over the cross-section of the enclosure (5), a diffusion element (9) and a flow calming method in such a reactor.

Abstract: The invention relates to a method for estimating a clearance (7) between a tower (2) and foundations (6) of a wind turbine (1), comprising the following steps: S1: acquiring N maximum accelerations of the tower (2) of the wind turbine (1); S2: associating a predefined interval of accelerations with each maximum acceleration; S3: determining the number of occurrences of each interval of accelerations over the N time intervals; S4: deducing therefrom a mode for the N time intervals; S5: repeating steps S1 to S4 multiple times so as to obtain multiple modes; S6: comparing the modes obtained in this manner and deducing therefrom a change in the clearance (7).

Abstract: A proton-conductive electrochemical device and method for manufacturing the device. The device comprising a positive electrode able to reduce an oxidizing species, a negative electrode able to oxidize a reducing species, and a proton-conductive electrolyte, in contact with the positive and negative electrode. The device further comprises a layer able to diffuse protons and electrons, and forms a protective barrier against contaminants for the electrolyte. The layer is in contact with both the electrolyte and the negative electrode, and comprises a material of the type ABB?O3 or a material of the type ABO3, wherein A is an element chosen from group II of the periodic table, B is an element chosen from cerium and group IVB of the periodic table, B? is an element chosen from lanthanides or group VIIIB of the periodic table, and the layer has a porosity of less than 10% by volume.

Abstract: The invention relates to a method for processing images obtained by a diffraction detector, of a crystalline or polycrystalline material, in which a first image of the material is acquired in a state of reference as well as a second image of the material in a deformed state. The invention is characterised in that, in a calculator, during a first step (E6, E12), a current elastic deformation gradient tensor Fe is given a value determined by calculation, during a second step (E7), the current displacement field induced by the tensor Fe is calculated, during a third step (E8), third digital values of a deformed image {hacek over (g)}(x)=g(x+u(x)) corrected by the current displacement field are calculated, and during an iterative algorithm, iterations of the second and third steps (E12, E7, E8) are carried out on modified values of the tensor r Fe until a convergence criterion is met in relation to the correction to the current value of Fe.

Abstract: The present invention relates to a method for optimizing the adjustment of the gating of a hydraulic turbine (1), the turbine (1) is provided with a set of wicket gates (2), wicket gates (2) are moving with a single, conjoined movement between a closing position in which they press against one another and an opening position in which they are apart from one another, by a control ring (4) that is kinematically connected to each one of these wicket gates (2), this control ring (4) being moved in rotation by at least one actuator (3), this actuator (3) including a device (31) for adjusting the travel of its rod (30), the method includes at least the following steps, the turbine (1) is previously stopped and dry and the rod (30) of the actuator (3) is provided with at least one strain gauge: 1) calculating the theoretical force to be applied to the actuator (3) in order to obtain watertight closure of the wicket gates (2); 2) measuring, via the strain gauge, the force applied to the actuator (3), the latter being

Abstract: The disclosure relates to controlling electricity production by a facility of photovoltaic panels in order to establish a power reserve. A method is carried out iteratively and includes: issuing respective setpoints to a number k of inverters among the set of N inverters, so that each produces a maximum power, where k<N, the k inverters being determined for a given iteration of the method, and obtaining, from the k inverters, measurements of the maximum power respectively produced by the k inverters and storing these measurements in memory with N-k other measurements obtained from N-k additional inverters during preceding iterations of the method; estimating, by reading the contents of the memory, a total maximum power able to be produced by the set of N inverters of the facility, and obtaining information relating to an amount of reserve power to be established, and determining an overall power to be produced.

Abstract: A photovoltaic device comprising: a plurality of photovoltaic cells, separated from each other; a support receiving the cells; and a light guide in contact with the cells and comprising a primary guide with a surface that is proximal to the cells, where the proximal surface is oriented towards the cells and the support. The photovoltaic device comprises, between the cells, areas located between the support and the primary guide which comprise a material with an index of refraction less than that of the proximal surface, where the material is in contact with the proximal surface.

Abstract: The invention relates to a belt for measuring physical quantities of an object, comprising at least one measurement sensor, a strip and a device for clamping the strip around the object. According to the invention, the belt comprises a pressing device for pressing the measurement sensor in a first orientation toward the object, comprising a casing attached to the strip, an intermediate part and a constraining member to have the intermediate part assume a first low position in which it presses toward the sensor in the first orientation, a lifting member, for holding the intermediate part in a second lifting position above the first low position against the constraining member, the lifting member being actuable from the outside of the casing to have the intermediate part pass from the second lifting position to the first low position in which it presses toward the sensor.

Abstract: The invention concerns a belt for measuring temperature of an object, the belt comprising: at least one measurement sensor, a strip having a circumference intended to surround the object, a device for clamping the strip around the object, characterized in that the temperature sensor is mounted on an individual heat-insulating support displaceable in a guiding direction toward the object between at least two heat-insulating pads which are intended to abut against the object, the pads being attached to the strip.