Abstract: A voltage drop Vzs is calculated based on an output current detection value Iac and a virtual synchronous impedance Zs or a corrected virtual synchronous impedance Zs?, and a value obtained by subtracting the voltage drop Vzs from an internal induced voltage Ef is output as a grid voltage command value Vac*. Zs calculation unit 7 limits an output current phase ? so that the output current phase ? is within an effective range by a phase limiter 12a, and calculates the corrected virtual synchronous impedance Zs? based on a limited output current phase ?, the internal induced voltage Ef, a grid voltage detection value Vac and a current limit value Ilim. Accordingly, in grid interconnection power conversion device that controls a virtual synchronous generator, it is possible to continue operation while suppressing an overcurrent and possess a synchronizing power generated by action or working of a virtual synchronous impedance.

Abstract: Examples provide a seat assembly, a system including the seat assembly and a method for reducing electromagnetic interference in an aircraft. A seat assembly for an aircraft includes a frame having a base and a support member operatively coupled to the base. A seat is coupled to the base and a first side of the support member. The seat includes a conductive substrate layer configured to absorb electrical charges.

Abstract: A patch antenna is constituted by a radiation element disposed on a substrate and a ground conductor disposed in the substrate. A dielectric member is disposed to cover the radiation element and a body of a resin material is disposed to cover the dielectric material as viewed from above. The dielectric member is disposed on a side opposite a side on which the ground conductor is disposed as viewed from the radiation element. When a direction of a normal line to the radiation element is assumed as a height direction, a line which links centroids of horizontal sectional surfaces of the dielectric member in the height direction leans with respect to the direction of the normal line to the radiation element.

Abstract: An apparatus comprises a processing device configured to select first and second versions of at least a given portion of a web application, to obtain first and second document object model structures of the first and second versions of the given portion of the web application, and to generate, based at least in part on the first and second document object model structures, first and second tree structures, the first and second tree structures comprising nodes representing web elements of the given portion of the web application. The processing device is also configured to identify node differences between the first and second tree structures, to generate information characterizing differences between web elements in the given portion of the first and second versions of the web application, and to initiate automated action based at least in part on the generated information.

Abstract: A data processing method for a data processing system having a first communications node and a second communications node where the first communications node corresponds to a first blockchain node and the second communications node corresponds to a second blockchain node that maintains a same block chain as the first blockchain node, the method including obtaining, by the first communications node, to-be-verified data when a terminal camps on a target cell, where the to-be-verified data is obtained based on camping information of the terminal, and the target cell is a cell within signal coverage of the first communications node sending, by the first communications node, the to-be-verified data to the second communications node, so that the second communications node verifies the to-be-verified data based on the second blockchain node, and obtaining, by the first communications node, a target block if the verification succeeds.

Abstract: Disclosed is a 5G NR antenna device. An antenna module includes an antenna material formed of a metal material and having a semi-planar inverted-F antenna (PIFA) structure, and a support formed in the shape of a hexahedron with side and bottom faces that are bent from the antenna material by stamping, wherein the support and the antenna material are formed as an integral body.

Abstract: A method for operating a bone conduction communication system can include establishing a communicable connection, operating a transducer in an input mode wherein the bone conduction transducers are configured to detect a vibration associated with a bone of the user; transmitting an audio signal over the communicable connection; and operating the transducers responsive to the audio signal.

Abstract: An antenna structure with wide radiation bandwidth in a reduced physical space includes a metallic housing, a first feed portion, and a second feed portion. The metallic housing includes a metallic side frame and a metallic back board. The metallic side frame defines a slot, and first and second gaps. The metallic side frame between the first gap and one end of the slot forms a first radiation portion. The second gap divides the first radiation portion into first and second radiation sections. The first feed portion feeds current and signal to the first radiation section, and the first radiation section works in a GPS mode and a WIFI 2.4 GHz mode. The second feed portion feeds current and signal to the second radiation section, and the second radiation section works in a WIFI 5 GHz mode.

Abstract: A single-switch-per-bit topology for reconfigurable reflective surfaces (RRSs) is provided. Novel multi-bit unit-cell configurations are presented for radio-frequency (RF) RRSs with improved radiation efficiency and compact designs. Embodiments described herein realize a multi-bit RRS using an antenna array with multiple integrated switches at the ports of every antenna element (e.g., one at each port, providing one control bit per switch). By manipulating the states of the switches, the impinging waves on the surface are modulated, leading to beamforming in the desired direction. Some embodiments utilize a single switch-per-bit topology integrating single-pole-single-throw (SPST) switches (e.g., PIN diodes) into the unit-cell design, achieving up to 4 bits of phase quantization with only 4 switches. The exhibited radiation efficiency of the multi-bit RRS is significantly improved compared to lower bit configurations.

Abstract: A T-breaker is an all-in-one solution for dc microgrid fault protection, power flow control, and power quality improvement. A T-breaker features a modular multilevel “T” structure with integrated energy storage devices. The two horizontal arms of the T-breaker realize fault current breaking, load voltage compensation, and power flow control; and the vertical arm of the T-breaker realizes shunt compensation. The configuration provides excellent voltage scalability and relaxes the requirements on the switching signal synchronization during fault transients. The local energy storage in sub-modules eases the fault energy dissipation requirement placed on the traditionally-adopted surge arrestors. The modular multilevel structure also offers immense control flexibility for all types of targeted functions of the provided T-breaker.

Abstract: The present disclosure relates to a heating system comprising: a heating element for heating a process medium; a DC power converter configured to receive an input direct-current voltage from a power supply and to deliver an output direct-current voltage to the heating element; a sensor arrangement configured to generate a first sensor output signal indicative of a thermodynamic parameter of the process medium or the heating element; and a controller configured to control the DC power converter based on the first sensor output signal.

Abstract: A voltage converter for direct current includes a power converter circuit having a transformer, a switch converter bridge on a primary-side of the transformer, and a full-bridge rectifier on a secondary side of the transformer. The full-bridge rectifier has first and second rectifier branches. A capacitor is asymmetrically connected to the second rectifier branch.

Abstract: A mobile terminal including an antenna according to an embodiment is provided. The mobile terminal includes a slide metal part and a front metal part, and a contact member configured to contact the slide metal part and the front metal part is provided on a side of the front metal part. In a first state in which a display area of the mobile terminal is contracted, the contact member may remove parasitic resonance caused by a slot area, as the slide metal part and the front metal part contact are contacted by the contact member at a first position which is a lower end of the slot area, and in a second state in which the display area is expanded, the contact member may remove parasitic resonance caused by the slot area, as the slide metal part and the front metal part are contacted by the contact member at a second position which is an upper end of the slot area.

Abstract: A method for using a patch for pain relief, and the patch are provided. The method includes determining a location corresponding to source of pain in a body, and disposing a patch including a reactive capacitance material at one of a location corresponding to source of pain or a location between location corresponding to source of pain and a brain. The patch is disposed adjacent to the surface of the body. The reactive the capacitance material comprises conductive particles dispersed in a binder so that at least a majority of the conductive particles are adjacent to, but do not touch, one another. The patch includes a first outer layer, a reactive capacitance layer, and a second outer layer. The reactive capacitance layer is disposed between the first outer layer and the second outer layer. The reactive capacitance layer is formed of the reactive capacitance material.

Abstract: Described herein is an earphone including an ear hook portion and an earphone portion, the ear hook portion is provided with a first magnetic attraction member, the earphone portion is provided with a second magnetic attraction member, and the second magnetic attraction member attracts and cooperates with the first magnetic attraction member to connect the earphone portion with the ear hook portion; a heart rate detection module, the heart rate detection module is arranged on the ear hook portion and/or earphone portion.

Abstract: In an example, a speaker device may include a first transducer and a second transducer. The first transducer may include a first diaphragm, a first magnetic circuit, and a first voice coil disposed in a magnetic gap of the first magnetic circuit to cause vibration of the first diaphragm. The second transducer may include a second diaphragm, a second magnet circuit, and a second voice coil disposed in a magnetic gap of the second magnetic circuit to cause vibration of the second diaphragm. Further, the speaker device may include a magnetic plate having a first surface coupled to the first transducer and a second surface coupled to the second transducer. The first surface is opposite to the second surface.

Abstract: A headset and/or a hearing protection device comprises a waterproof speaker assembly. The waterproof speaker assembly comprises a speaker unit, a waterproof speaker housing, and a waterproof pressure equalization element. The speaker unit includes a transducer configured to generate an audio frequency signal. The waterproof speaker housing is configured to receive and sealably enclose, in part or in full, the speaker unit in an interior or a cavity of the waterproof speaker housing. The waterproof pressure equalization element is permeable to air. The waterproof speaker housing is configured to receive and/or support the waterproof pressure equalization element. The waterproof pressure equalization element is configured to equalize surrounding or ambient pressure changes from the interior or cavity of the waterproof speaker housing.

Abstract: An integrated glazing with a data transponder embedded between layers of glass is disclosed. The data transponder stores and processes data. The integrated glazing also includes a display unit including display elements disposed between layers of glass, communicating with the data transponder. The integrated glazing may comprise a data channel, a power channel, antenna and chip. An intelligent system is also disclosed including the integrated glazing, a reader device and a control system. The reader device is communicably coupled to the integrated glazing to generate signals based on the received data. The control system is communicably coupled to the integrated glazing and the reader device to process signals received from the reader device and perform pre-defined operations in response to the instructions and received signals.

Abstract: A terminal device includes a metal frame. At least two slots are provided on one side of the metal frame; at least two antenna feed points are provided on an inner side wall of the metal frame, and different antenna feed points in the at least two antenna feed points are located on sides of different slots. The terminal device is further provided therein with a signal reflecting wall, and there is a gap between the signal reflecting wall and the at least two slots. The signal reflecting wall is formed by a metal wall of a battery compartment of the terminal device, and the signal reflecting wall is a reflective curved surface that is convex. The metal frame and the signal reflecting wall are electrically connected with a ground plate in the terminal device.

Abstract: The present disclosure provides a power supply control device and a flyback converter. The power supply control device includes: a comparator, comparing a current sensing signal generated by IN conversion of a primary side current flowing in the primary winding with a threshold voltage; a switching controller, turning off a switching element according to a comparing result of the current sensing signal and the threshold voltage by the comparator; an external terminal, connectable to a connection node of an external resistor connected in series between one end of the auxiliary winding and an application end of a ground potential; a current detector, detecting a terminal current flowing through the external terminal; and a threshold voltage corrector, correcting the threshold voltage based on a current detection signal of the current detector.