Abstract: A magnetic core (iron core) is a crucial component of electromagnetic devices including motors, transformers, and reactors, accounting for approximately 50% of the total weight. In electromagnetic devices like air-core transformers, the magnetic core is absent. However, due to the poor magnetic permeability of air, a large excitation current is required, resulting in weak load capacity, bulky size, and limited application scope. According to the present disclosure, a plurality of vector magnetic circuit components are utilized to construct a virtual magnetic circuit with magnetic permeability similar to or even better than that of a physical magnetic core, constituting a virtual magnetic core. Based on this, an application method is provided for constructing electromagnetic devices, including transformers, reactors, and motors, using the virtual magnetic core, which is capable of achieving significant reductions in the weight and volume of such devices.

Abstract: A method includes establishing a wireless connection between a mobile device and a programmable zone controller. The mobile device executes an application program configured to communicate with the programmable zone controller. The mobile device executes an application program displaying a zone dashboard on a display of the mobile device, wherein the zone dashboard includes a plurality of critical operating parameters associated with the programmable zone controller that are retrieved from the programmable zone controller. The application program is configured to display a listing of air flow control devices that are operatively coupled to the programmable zone controller and to allow a user of the mobile device to select one of the air flow control devices from the listing of air flow control devices, and in response, display a plurality of critical operating parameters associated with the selected air flow control device.

Abstract: A system for controlling a face velocity of a fume hood includes one or more sensors that are configured to detect one or more users in front of the fume hood. A controller is configured to determine a desired ventilation airflow rate for the fume hood based at least in part on the one or more users detected by the one or more sensors, wherein the desired ventilation airflow rate corresponds to one of three more available ventilation airflow rates. The controller is configured to provide a control signal to a ventilation device of the fume hood, wherein the control signal corresponds to the desired face velocity.

Abstract: A fume hood includes a housing with a fume hood opening for accessing a working chamber and movable sashes that cover the opening. The fume hood has sash position sensors with a base fixed to the housing and terminals fixed to the sashes. The sensors determine sash positions using time of flight measurements of radio signals between the base and terminals. An exhaust fan exhausts air from the working chamber, controlled by a controller that modulates exhaust air flow based on sash positions. The fume hood can include multiple sashes movable in horizontal and/or vertical directions, with single or multiple bases communicating with multiple terminals. Methods include transmitting radio signals between bases and terminals, determining sash positions from time of flight measurements, and adjusting exhaust air flow accordingly. Ultra-Wide Band radio signals with bandwidth greater than 500 MHz may be used.

Abstract: A display module includes a film, a liquid crystal module, and a frame. The film includes a first main body portion and first protrusions extending from a first side edge of the first main body portion, with the first protrusions spaced apart. The liquid crystal module includes a liquid crystal screen and a flexible circuit board fixedly connected to the liquid crystal screen. The liquid crystal screen is stacked with the film, and the flexible circuit board is bent from the first side edge. The frame includes a first side wall. A distance disposed between the first protrusion and the first side wall is less than a predetermined distance. An adjacent first protrusion forms a first opening space with the first side wall, and the flexible circuit board penetrates from the first opening space to avoid the flexible circuit board.

Abstract: The present invention discloses a superconducting motor quench detection method and apparatus based on rotational symmetry of a motor, belonging to the technical field of superconducting motor quench detection. The method includes: acquiring terminal voltages of each group of superconducting magnets in a superconducting motor, where the superconducting motor is pre-divided into at least two unit motors by using the rotational symmetry of the motor, and superconducting magnets located at corresponding positions are selected from the at least two unit motors as a group of superconducting magnets; calculating an absolute value of a terminal voltage difference of each group of superconducting magnets; and judging whether the absolute value exceeds a preset threshold, and if the absolute value exceeds the preset threshold, determining that the superconducting magnets are in a quench state.

Abstract: Embodiments of the present disclosure provide a display device, comprising a display module. The display module comprises a back plate. A first accommodating part and a second accommodating part which are stacked and communicated with each other are formed on one side of the back plate. The first accommodating part is configured to accommodate a backlight component, and the second accommodating part is configured to accommodate a liquid crystal screen.

Abstract: A linear Hall-based eccentricity diagnosis method and detection system for a permanent magnet motor. First, three linear Hall elements are mounted in stator slots at the same space interval, respectively; second, analog signals output by the three-phase linear Hall are converted into digital signals by means of a digital signal processor, and the digital signals are converted into a quadrature signal by means of linear combination; then, a negative sequence signal and a sideband signal are extracted from the quadrature signal by means of a complex factor filter; then the amplitude of the negative sequence signal and the amplitude of the sideband signal are extracted by means of synchronous reference frame phase-locked loops as a static eccentricity indicator and a dynamic eccentricity indicator; finally, percentages representing the degrees of eccentricity are calculated from the static eccentricity indicator and the dynamic eccentricity indicator in the digital signal processor.

Abstract: The present invention discloses a superconducting motor quench detection method and apparatus based on rotational symmetry of a motor, belonging to the technical field of superconducting motor quench detection. The method includes: acquiring terminal voltages of each group of superconducting magnets in a superconducting motor, where the superconducting motor is pre-divided into at least two unit motors by using the rotational symmetry of the motor, and superconducting magnets located at corresponding positions are selected from the at least two unit motors as a group of superconducting magnets; calculating an absolute value of a terminal voltage difference of each group of superconducting magnets; and judging whether the absolute value exceeds a preset threshold, and if the absolute value exceeds the preset threshold, determining that the superconducting magnets are in a quench state.

Abstract: A power generation device and method based on the time-varying magductance principle relate to the field of energy conversion, and in particular relate to an electromagnetic induction power generation device. The power generation device includes an electric energy generation unit, a power conversion unit and an electric energy storage unit. The electric energy generation unit includes a time-varying magductance component configured to form a closed conductor loop in a magnetic circuit with constant magnetic flux. By changing a magductance parameter of the time-varying magductance component, the time-varying magductance component generates induced current. The power conversion unit consists of a switching device and a circuit. The electric energy generated by the time-varying magductance component can be stored into the electric energy storage unit through controlling the switching device.

Abstract: A method includes establishing a wireless connection between a mobile device and a programmable zone controller. The mobile device executes an application program configured to communicate with the programmable zone controller. The mobile device executes an application program displaying a zone dashboard on a display of the mobile device, wherein the zone dashboard includes a plurality of critical operating parameters associated with the programmable zone controller that are retrieved from the programmable zone controller. The application program is configured to display a listing of air flow control devices that are operatively coupled to the programmable zone controller and to allow a user of the mobile device to select one of the air flow control devices from the listing of air flow control devices, and in response, display a plurality of critical operating parameters associated with the selected air flow control device.

Abstract: A method for operating a powerline is presented: —the powerline comprising a sending and a receiving end, —at least one shunt reactive power compensation device for regulating reactive power in the powerline, —means for measuring a line voltage of the powerline at the receiving end, —means for measuring reactive power to the load Qload, —means for determining the required reactive power of the shunt reactive power compensation device, the method comprising: —receiving information on parameters for the powerline, —determining a maximum transmission efficiency parameter H for the powerline based on the parameters for the powerline, —measuring line voltage at the receiving end of the powerline, —determining required reactive power Qreq based on the parameter H and the measured line voltage at the receiving end of the powerline, —measuring reactive power to the load Qload, —determine the required shunt reactive power Qshunt based on Qreq and the measured reactive power to the load Qload, —regulating the shunt rea

Abstract: A stator structure of a magnetic levitation flux-switching motor includes a stator of a modular structure and a motor housing. A modular stator includes front and rear side winding end heat dissipation modules, modular stator left and right wings, a modular stator permanent magnet, front side magnetic conduction column left and right wings, an inter-front side and inter-rear side magnetic conduction column permanent magnets, insulating layers, a stator winding, and rear side magnetic conduction column right and left wings. The front side and rear side winding end heat dissipation modules are of hollow structures, and are symmetrically provided with a cooling medium inlet and a cooling medium outlet, a cooling medium channel is disposed inside a hollow cavity, one side of the heat dissipation module is a smooth curved surface, and good thermal contact can be achieved between the heat dissipation module and the stator winding and the insulating layer.

Abstract: A fume hood monitor includes a user interface including a display, a wireless interface and a memory that stores a plurality of fume hood parameters and one or more default display settings. A controller is configured to display one or more of the plurality of fume hood parameters on the display formatted in accordance with the default display settings. The controller is configured to detect a presence of a mobile device, and in response, receive personalized display settings from the mobile device via the wireless interface and to display one or more of the plurality of fume hood parameters on the display formatted in accordance with the personalized display settings. When the mobile device is no longer detected, the controller is configured to display one or more of the plurality of fume hood parameters on the display formatted in accordance with the default display settings.

Abstract: Disclosed are a method and system for measuring a flux-switching electric motor rotor angle on the basis of linear Hall. The method comprises: firstly, selecting four linear Hall sensors and respectively mounting same in four slots of a stator; a first linear Hall sensor is mounted in any slot of the stator, and a second linear Hall sensor is spaced apart from the first linear Hall sensor by N1 slots in a unified direction; N1 is an even number, and N1?ks/(2p); a third linear Hall sensor is spaced apart from the first linear Hall sensor by N2 slots; N2 is an odd number, and N2=(2k?1)s/(2p); and a fourth linear Hall sensor is spaced apart from the second linear Hall sensor by N2 slots; and then calculating an electric motor rotor angle according to voltage signals of the four linear Hall sensors.

Abstract: A fume hood monitor includes a fume hood monitor controller that is configured to display one or more of the fume hood parameters on a display of the fume hood monitor and to communicate with the mobile device. The mobile device includes a mobile device controller that is configured to pair the mobile device with the fume hood monitor. Once paired, the mobile device controller is configured to receive two or more of the fume hood parameters from the fume hood monitor controller, display two or more of the received fume hood parameters on a display of a user interface of the mobile device, and receive a user interaction via the user input device of the mobile device. The user interaction may allow a user to manipulate information that is displayed on the display of the mobile device regarding the fume hood.

Abstract: The present disclosure belongs to the technical field of artificial cardiac pacemakers, and particularly relates to a leadless left-bundle-branch pacemaker. The leadless left-bundle-branch pacemaker comprises a case and an implant core, wherein the implant core is coaxially arranged inside the case, and a head of the implant core can be rotated out from the inside of the case; the implant core has an implant end that can be rotated out from the inside of the case, and the length of the implant end rotated out from the inside of the case is greater than 10 mm; and an end of the case corresponding to the implant end is provided with a fixing end for fixing the pacemaker.

Abstract: Provided are a compound of formula (I), or a pharmaceutically acceptable salt, solvate, active metabolite, polymorph, isotopic label, isomer or prodrug thereof, and a use thereof. The above-mentioned compound has a very strong inhibitory effect on the FGFR4 kinase activity and the proliferative activity of Hep 3B cells with high FGFR4 expression.

Abstract: A point cloud matching method and apparatus, an electronic apparatus, and a storage medium are provided. The point cloud matching method includes: dividing a to-be-matched point cloud into a plurality of matched point cloud patches, and inputting the plurality of matched point cloud patches to a pre-trained point cloud feature coding module to obtain feature vectors of the plurality of matched point cloud patches; and acquiring a global description vector of the to-be-matched point cloud according to the feature vectors of the plurality of matched point cloud patches, matching the global description vector of the to-be-matched point cloud with global description vectors of point cloud frames in a preset historical database, and determining a point cloud frame in the historical database within a preset matching threshold range to be a point cloud matching result.