Abstract: The present disclosure provides a method and system for monitoring a coal shearer status based on digital twinning, and an electronic device, and relates to the technical field of real-time status monitoring. The method includes: obtaining physical parameters, real-time driving data, and real-time status data of a coal shearer physical entity, where the physical parameters include geometric parameters, material properties, and positional parameters; the real-time driving data includes a real-time position, a real-time speed, and a real-time angle of a rocker arm; and the real-time status data includes real-time vibration information; building a coal shearer digital twin model on a Unity3D engine according to the physical parameters of the coal shearer physical entity; and updating a status of the coal shearer digital twin model based on the real-time driving data and the real-time status data. The present disclosure achieves visual monitoring of a coal shearer status.

Abstract: A method for filling carbide blades in cutter head by using a carbide blade cutter head filling device. The carbide blade cutter head filling device includes a feeding unit, a storage unit, a loading unit and a discharging unit which are arranged successively. The output end of the feeding unit is matched with the input end of the storage unit through the guide mechanism. The output end of the storage unit faces a conveying tray of the loading unit. The conveying tray is provided with a plurality of group of transition holes for accommodating blades. A receiving mechanism for accommodating a cutter head is arranged below the falling pull plate of the discharging unit. The falling pull plate adjusts the communication and isolation between the transition hole and the cutter head in the receiving mechanism by changing the relative position of the falling pull plate and the transition hole.

Abstract: Provided is a method for selecting a server. The method includes: receiving a first group call request from a calling party of a target group, wherein the first group call request carries information of target regions of session members in the target group; determining, according to first delay periods of user devices in each of the target regions in data communication with directly connected servers, a first server corresponding to the each of the target regions; and determining, according to an average delay period of the first server in data communication with the user devices in the each of the target regions, a central server for a group call of the target group.

Abstract: Provided are a foldable display device and a driving method of a foldable display device. The foldable display device includes a foldable screen, an image sensor, and a driving display unit. The image sensor is located at the edge of the foldable screen and configured to collect an alignment image in an opposed region of the image sensor after the foldable screen is folded. The driving display unit is configured to determine a position of the opposed region of the image sensor according to characteristic information of the alignment image in the opposed region of the image sensor and determine a folded state of the foldable screen according to the position of the opposed region of the image sensor.

Abstract: Disclosed herein is a case for accepting portable electronic devices, such as tablets, of multiple sizes. The case includes a central well that may receive either the portable electronic directly, or a portable electronic device and a frame. The well is bordered by channels having a lip to an exterior face, the lip acting to retain the portable electronic device or frame and portable electronic device within the well. The material making up the frame is preferably of a higher durometer than the material making up the main body of the case.

Abstract: Methods and apparatus for offloading wireless connections are disclosed. An example method includes configuring a wireless offload engine to maintain a wireless connection on behalf of one or more circuits coupled to the wireless offload engine, determining that the one or more circuits are to enter a low-power state, and maintaining the wireless connection after the one or more circuits have entered the low-power state based at least in part on the configuring.

Abstract: A method and a composite for evaporative cooling are provided. The method includes synthesizing MOF-801 and preparing CaCl2@MOF-801 composite based on the MOF-801. The synthesizing MOF-801 includes dissolving fumaric acid and ZrOCl2·8H2O into a solvent having N, N-Dimethylformamide and formic acid to produce a mixture; heating the mixture at a predetermined temperature for a predetermined amount of time; cooling the mixture to room temperature to obtain precipitate of MOF-801; separating the MOF-801 by a filter of a predetermined pore size; and drying the separated MOF-801 at a predetermined temperature for a predetermined amount of time to activate the MOF-801. The preparing CaCl2@MOF-801 composite includes dissolving a predetermined amount of CaCl2 in deionized (DI) water; applying ultrasonication to the solution for a predetermined amount of time; and mixing the MOF-801 synthesized with the CaCl2 solution under ultrasonication at a predetermined temperature for a predetermined amount of time.

Abstract: A nanofiber actuator comprises a composite structure and a vanadium dioxide layer. The composite structure comprises a carbon nanotube wire and an aluminum oxide layer. The aluminum oxide layer is coated on a surface of the carbon nanotube wire, and the aluminum oxide layer and the carbon nanotube wire are located coaxially with each other. The vanadium dioxide layer is coated on a surface of the composite structure, and the vanadium dioxide layer and the composite structure are located non-coaxially with each other.

Abstract: A method for adjusting brightness of a display panel and a device for adjusting brightness of a display panel are provided. The display panel includes a plurality of sub-pixels, and the method includes adjusting data voltages of at least two sub-pixels of the plurality of sub-pixels to be different when performing a zero grayscale display.

Abstract: The combination of: a portable electronic device; a base on the portable electronic device and having at least one connector part; and an accessory usable with the portable electronic device and having at least one connector part. The at least one connector part on the base and at least one connector part on the accessory are configured to cooperate such that: a) the accessory is movable from a starting position, fully spaced from the base, to against the base and guidingly relative to the base in translation in a first direction along a first path portion towards one fully connected relationship with the base; and b) with the accessory in the one fully connected relationship with the base the accessory is blocked from being separated from the base.

Abstract: A display driving method, a display driver and a display device are provided. The display driving method includes acquiring a first grayscale of at least one to-be-displayed sub-pixel, performing a first compensation manner to compensate the first grayscale and acquire a second grayscale, determining whether the second grayscale is less than a critical value; if yes, performing a second compensation manner to compensate the second grayscale and acquire a third grayscale, and acquiring a data voltage based on the third grayscale to control the sub-pixel to emit light and display, and if no, acquiring a data voltage based on the second grayscale to control the sub-pixel to emit light and display. The problem of displaying color deviation when the display panel is displayed at a low grayscale can be avoided.

Abstract: An array base plate and a fabricating method thereof, a display panel and a displaying device. The array base plate includes a substrate, the substrate is divided into a displaying region and a non-displaying region that surrounds the displaying region, and the non-displaying region includes a chip binding region; the array base plate further includes a target film layer provided on the substrate, and the target film layer extends to the non-displaying region; and the target film layer has a depression structure on a side that faces the chip binding region, and a position of the depression structure corresponds to a position of the chip binding region, whereby an orthographic projection of an alignment film in the array base plate on the substrate does not have a coinciding area with the chip binding region.

Abstract: A laser remote control switching system comprises a laser source and a control circuit. The control circuit comprises a power, an electronic device, a first electrode, a second electrode, and a photosensitive element electrically connected in sequence to form a loop. Each of the two nanofiber actuators comprises a composite structure and a vanadium dioxide layer. The composite structure comprises a carbon nanotube wire and an aluminum oxide layer. The aluminum oxide layer is coated on a surface of the carbon nanotube wire, and the aluminum oxide layer and the carbon nanotube wire are located coaxially with each other. The vanadium dioxide layer is coated on a surface of the composite structure, and the vanadium dioxide layer and the composite structure are located non-coaxially with each other.

Abstract: A supercapacitor is provided. The supercapacitor includes an elastic fiber, an internal electrode, a first electrolyte layer, and an external electrode. The internal electrode, the first electrolyte layer, and the external electrode are sequentially wrapped on an outer surface of the elastic fiber. The internal electrode includes a first carbon nanotube film and a NiO@MnOx composite structure, and the external electrode includes a second carbon nanotube film and a Fe2O3 layer.

Abstract: A cavity blackbody radiation source is provided. The cavity blackbody radiation source comprises a blackbody radiation cavity and a carbon nanotube composite material. The blackbody radiation cavity comprises an inner surface. The carbon nanotube composite material is located on the inner surface. The carbon nanotube composite material comprises a black lacquer and a plurality of carbon nanotubes, and the plurality of carbon nanotubes is dispersed in the black lacquer.

Abstract: A cavity blackbody radiation source is provide. The cavity blackbody radiation source comprises a blackbody radiation cavity and a carbon nanotube composite material. The blackbody radiation cavity comprises an inner surface. The carbon nanotube composite material is located on the inner surface. The carbon nanotube composite material comprises a black lacquer and a plurality of carbon nanotubes, and the plurality of carbon nanotubes is in an upright state in the black lacquer.

Abstract: The present invention discloses a method for detecting open phase of a startup/standby transformer based on optical CT. A startup/standby transformer in a power plant is in a no-load condition for a long time as a standby power supply. Once a single-phase open phase fault occurs, there is no significant change in the voltage phasor and voltage sequence component of each side. If not found in time, the defect may pose a great threat to the safe operation of the power plant. In the present invention, the optical CT is used to detect a three-phase current of the high-voltage side of the startup/standby transformer. If the current satisfies an open phase criterion, it is determined that an open phase fault occurs, and then, an alarm signal is given after a delay and an operator is informed to handle the fault in time. Therefore, the operation reliability of the startup/standby transformer system in the power plant is enhanced.

Abstract: A display driving method, a display driver and a display device are provided. The display driving method includes acquiring a first grayscale of at least one to-be-displayed sub-pixel, performing a first compensation manner to compensate the first grayscale and acquire a second grayscale, determining whether the second grayscale is less than a critical value; if yes, performing a second compensation manner to compensate the second grayscale and acquire a third grayscale, and acquiring a data voltage based on the third grayscale to control the sub-pixel to emit light and display, and if no, acquiring a data voltage based on the second grayscale to control the sub-pixel to emit light and display. The problem of displaying color deviation when the display panel is displayed at a low grayscale can be avoided.

Abstract: Display panel, display device and detection compensation method of display panel are disclosed herein. In one embodiment, a display panel includes: display pixels arranged in M rows and N columns and provided in a display area, where both M and N are both positive integers; first power supply lines provided in the display area; and an integrated circuit, a switch circuit and a voltage stabilization transistor provided in a border area. One row of display pixels is electrically connected to one first power supply line. The first power supply lines are electrically connected to a first pin of the integrated circuit. A detection pin of the integrated circuit is electrically connected to the switch circuit. The voltage stabilization transistor includes: a control electrode electrically connected to the second pin, a first electrode electrically connected to the detection pin, and a second electrode electrically connected to one row of display pixels.