Mitsubishi Electric R&D Centre Europe Patente

The disclosure relates to a method performed by a vertical federated learning, VFL server (10, 10a), the method comprising: obtaining (31, 31a, 31b) client information for a plurality of VFL clients (11, 12, 13, 14, 11a, 12a, 13a, 14a), the client information for a VFL client including data indicative of a reliability and/or a resource availability of the VFL client; transmitting (34, 34a, 34b) allocation instructions, the allocation instructions defining associations of local models to respective VFL clients, wherein the allocation instructions take account of the client information; obtaining (35, 35a, 35b) an update to the client information for a VFL client during a use of a local model by the VFL client in a training task (22) or an inference task (23); transmitting (36, 36a, 36b) at least one updated allocation instruction, an updated allocation instruction defining a reassociation of a local model to a respective VFL client, and wherein the at least one updated allocation instruction takes account of the update to the client information; and transmitting (33, 33a, 33b) model information for at least one of the local models, the model information comprising one or more of a model importance, a model size, and a model complexity, wherein the allocation instructions and/or the at least one updated allocation instruction take account of the model information.

The invention relates to a method, implemented by computer means of a telecommunication device , for inserting reference signals, said telecommunication device comprising a modulator, said method comprising: obtaining a sequence of signal samples, by inserting reference signals according to at least one reference signal pattern within a sequence of data samples ; feeding said modulator with signal blocks obtained from said sequence of signal samples wherein: the positions, in said sequence of signal samples, of the reference signals inserted according to each of said at least one reference signal pattern are a proper subset of a finite arithmetic progression ; said proper subset comprises at least three terms of the finite arithmetic progression, said at least three terms comprising the initial term of the finite arithmetic progression, and the final term of the finite arithmetic progression.

A ray-based detection system for detecting a wave blocking content within an environment (E) in based on ray-tracing. The system suits for detecting presence of an object or a human in the environment, in particular for safety of security applications. Two alternative implementations are provided for inferring the presence of the object or human from sensed waves. The system also allows distinguishing between several postures of the detected human. The waves implemented by the ray-based detection system may be radio waves, acoustic waves or laser-emitted waves.

An equalization optimizer (300) analyzes successive samples of at least one channel-related parameter (Pc) so as to determine contribution values of one or more time-reference classes representative of timescales of impact of channel impairments on response of an optical channel. The equalization optimizer (300) obtains environmental conditions data (Ed) representing environmental conditions at which equalization-related operations have to be performed. The equalization optimizer (300) performs channel inference so as to determine a contribution value for one or more remaining time-reference classes among said time-reference classes by relying on information learnt (Ld) from another channel in similar environmental conditions. The equalization optimizer (300) determines a value of at least one equalization-related parameter (Pe) according to the contribution values of the time-reference classes, and configures the equalization-related operations in accordance.

A method (60a) for determining assistance information for transmitting an upcoming data packet (j) via a route in a delay tolerant network including at least one contact (C₁-C₄) linking two routing entities (A-E),the method (60a) comprising:(S60) obtaining data related to the contact (C₁-C₄),(S611, S621) obtaining data related to the transmission of a data packet (i, j) among the upcoming data packet (j) and an ongoing data packet (i),based on at least said data related to the transmission of the data packet, (S612, S624) splitting the contact, said splitting resulting in at least first and second split contact (C_3a, C_3a*, C_3b, C_3b*) linking said two routing entities (A-E),(S614, S626) determining the assistance information, including at least data related to the first split contact and the second split contact (C_3a, C_3a*, C_3b, C_3b*).

An equalization optimizer analyzes (S401) successive samples of at least one channel-related parameter Pc so as to determine contribution values of time-reference classes representative of timescales of impact of channel impairments on response of an optical channel. The equalization optimizer determines (S402) a value of at least one equalization-related parameter Pe according to the contribution values of the predetermined time-reference classes and configures (S403) equalization-related operations in accordance. The equalization optimizer reviews (S404) the contribution value of each time-reference class at a rate of the timescale corresponding to the time-reference class in question, and updates (S406) accordingly the at least one equalization-related parameter Pe so that a part thereof which depends on the time-reference class in question is only updated, and the equalization optimizer reconfigures (S407) the equalization-related operations in accordance.

A thermal energy storage device is provided which comprises a first container and a second container, each having at least an obverse wall, a reverse wall, first side wall connecting the obverse wall and reverse wall, and an internal space, wherein the obverse wall and/or reverse wall has a substantially planar surface, wherein the internal space of the first container and/or the internal space of the second container contains a phase change material and wherein the first and second container are stacked to define a flow path for a fluid in an internal space of the thermal energy storage device, characterized in that the flow path allows a fluid to flow in a serpentine manner from an inflow port of the thermal energy storage device over the complete obverse wall and/or reverse wall of the first container, over the first side wall of the first container, over the complete obverse wall of the second container, over the first side wall of the second container and then over the complete reverse wall of the second container. Moreover, a system is provided.

The invention relates to a container for storing thermal energy, a method for producing a container for storing thermal energy, a thermal energy storage device and a system are provided. The container for storing thermal energy, comprises or consists of at least one wall defining an internal space of the container, a phase change material located in the internal space of the container and a gas located in the internal space of the container, characterized in that the gas in the internal space of the container has a higher thermal conductivity than air and the internal space of the container is sealed from an external space of the container in a gas-tight manner. The container for storing thermal energy according to the invention has an improved heat transfer property and a higher long-term stability.

A method, implemented by a sender node of a radiofrequency wireless communication system, said method comprising: sending to one or more receiver node, or receiving from said one or more receiver node, a signaling indicating an initialization of a procedure to insert in a plurality of data packets reference signals according to a plurality of reference signal patterns having respectively a plurality of distinct values of at least one parameter; inserting reference signals according to a first reference signal pattern in a first set of data packets ; sending, through a shared channel of said radiofrequency wireless communication system, said first set of data packets to said one or more receiver node of said radiofrequency wireless communication system ; inserting reference signals according to a second reference signal pattern in a second set of data packets, values of said at least one parameter being different between the first reference signal pattern and the second reference signal pattern ; sending, through said shared channel, said second set of data packets to said one or more receiver node.

A process for monitoring a degradation state of an electrical interconnection (15) in a power module assembly (100), comprises capturing a detection signal that is sensitive to a reverse recovery current originating from a diode (14) of the power module assembly. The reverse recovery current is triggered by a turning-on switching operation of a switch (11) in a tested half-bridge branch (1) that comprises said diode, switch and interconnection. The invention process may be combined optionally with another monitoring process based on a turning-off switching operation of the switch, for monitoring a degradation state of another electrical interconnection within the same half-bridge branch. Complete interconnection monitoring for said half-bridge branch is thus possible.

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Gate driver circuit, for a half bridge of a converter (100) where a first switching device (S<H>), having a first gate, and a second switching device (S<L>), having a second gate, are controlled independently and in a complementary way respectively through a first gate driver buffer (1a) and a second gate driver buffer (1b), and a controller (60) providing gate pull up and gate pull down pulse signals to the first and second gate drivers buffers, comprising a first gate current mirroring circuit (2a) on a sink branch of said first gate driver buffer (1a) and a second gate current mirroring circuit (2b) on a sink branch of said second gate driver buffer (1b) to provide, in advance from said pulse signals (GP1, .GP2) issued from the controller (60), a first early gate pullup command signal (EC1) issuing from the first gate current mirroring circuit (2a), for the second gate driver buffer (1b) under a turning off of said first switching device (S<H>) and a second early gate pullup command signal (EC2) issuing from the second gate current mirroring circuit (2b), for the first gate driver buffer (1a) from a turning off of said second switching device (S<L>), in advance from gate pull up pulse signals (GP1, GP2) issued from the controller (60).

A method for building a knowledge of an environment content (E) using a plurality of devices (i, j) implements selection of data internal to one of the devices operating as data-collecting node. The selected data are those less redundant with respect to external data newly received from the other devices. With a distributed configuration of the devices, the selected data may be shared with all devices, thereby prioritizing sharing data that are most relevant for enriching the digital representations which are stored in all devices. The method may also allocate more communication resources to transmission of most relevant data. Each device may be an unmanned aerial vehicle carrying a LiDAR sensing unit.

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Thermal impedance monitoring process for a power module of a power converter used for transforming DC current to AC current, or vice-versa, where the semiconductor dissipates an asymmetrical loss between two half cycles of an AC frequency f of the AC current, said power module comprising at least a semiconductor die attached to a material stack-up of layers for its thermal dissipation and/or electrical connections, said process comprising: - sampling and measuring a signal relating to the junction temperature Tj of said semiconductor die at a frequency higher than twice said AC frequency of said AC current, - calculating a time duration Δt= tTjmax- tTjmin between a moment tTjmax, where said junction temperature of said semiconductor die is at a maximum value, and a moment tTjmin, where said junction temperature is at a minimum value, in one period of said AC current, and storing said time duration Δt in a memory, - repeating said sampling and measuring said signal and said calculating said time duration at different times tx=t0 to tm during the operating life of the power module to provide a series of time durations Δt<t0> to Δt<tm> and comparing said time durations Δt<t0> to Δt<tm> values for monitoring an evolution of said time duration Δt to determine an evolution of degradation of the thermal impedance of said power module.

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A method for characterizing a carrier (10) which is equipped with a radio-transmitter (11) provides score values for the carrier to match each of several mobility models. The method may allow identifying a type of the carrier as that associated with a best-fit mobility model. The method may proceed by repeatedly executing a loop, each new execution of the loop delivering updated matching score values. The method is useful for monitoring a geographical zone, in particular for statistically analysing a traffic currently occurring in the geographical zone or characterizing a type of a transmitter-equipped carrier that is currently intruding into said geographical zone.

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A system for controlling a consumption of electrical energy is provided. The system comprises an electrical grid connection, at least one renewable energy generation device, at least one stationary electrical energy storage device, at least one thermal energy storage device, a heat pump, at least one forecast data source which is suitable to provide an electricity tariff forecast, at least one mobile electrical energy storage device being detachably connected to the system and a controller. The controller is configured to obtain information of the at least one forecast data source and is configured to control a charging and a discharging of the at least one stationary electrical energy storage device and of the at least one mobile electrical energy storage device based on information obtained from the at least one forecast data source. The system according to the invention allows minimization of operational costs, i.e. allows to reduce the cost of electricity for a building to which the system is connected.

Power module comprising a PCB comprising at least two outer layers (11, 12) provided with metallic tracks (13, 14, 15), comprising a core layer (16) embedding one or more power semiconductor dies (17) and comprising one or more deformation sensing elements (20, 21, 22) embedded in said PCB to sense a mechanical stress in at least one axis in a three dimension coordinate system attached to the PCB. Process for measuring stress on such a power module PCB comprising an initial measurement of a deformation D<0> of the PCB in use during a calibration period (100) with said strain gauges to provide a calibration of an initial deformation range of said PCB, in use measurements (110) of deformation cycles Cy of said PCB and counting (120) of said deformation cycles, repeating (150) said in use measurements during operation of said power module.

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