Abstract: A method for manufacturing a humidity alarm device based on laser-induced graphene is performed as follows. Carbon-based films are coated with a hydroxide ion-containing solution and processed by a laser device to generate hydrophilic graphene layers. The hydrophilic graphene layers are peeled off from the carbon-based films, wetted, and respectively wrapped around shaping rods varying in diameter. The wrapped rods are heated and shaped by a drying oven to obtain curled graphene switches. Each curled graphene switch is connected in series with an alarm lamp to form an alarm component. The alarm components are connected in parallel, and then connected to a positive terminal and a negative terminal of a power supply to form the humidity alarm device.

Abstract: A well-killing system for ultra-deep well drilling with co-existence of overflow and lost circulation is provided. An upper part of a wellhead blowout preventer is connected to a first mud pump and a lost circulation material mud tank through a pipeline, a first three-way control valve, and a second three-way control valve. A lower port of the second three-way control valve is connected to a second mud pump and a mud pit. A lower port of the first three-way control valve is connected to a first well-killing fluid tank and a second well-killing fluid tank. A gas-liquid separation tank is connected to a side of a wellhead device. A first pressure sensor and a first flowmeter are provided on a left port of the first three-way control valve. A second pressure sensor and a second flowmeter are provided at a left port of a third three-way control valve.

Abstract: A method of precoding matrix indicator, PMI, generation for channel state information, CSI, compression in a first radio transceiver device, RTD the method comprising: receiving, from a second RTD, a reference signal; estimating CSI based on the received reference signal; generating a PMI to perform CSI compression, wherein the PMI indicates a precoding matrix, selected from among a codebook of precoding matrices, based on orthogonal matching pursuit, OMP, processing of the estimated CSI; and generating a compressed CSI based on the generated PMI for transmission to the second RTD.

Abstract: Systems and methods are disclosed to develop and use a tool to enable an application package to be instrumented with automatic real user monitoring (RUM) without accessing the original source code. A package, such as Android application bundle (AAB) or Android package kit (APK), is imported and decoded and a generated source code file and/or manifest is obtained. Instrumentation is then added at a location corresponding to a code signature in the generated source code file (e.g., an operation to be instrumented before and/or after the operation). The generated source code file is then compiled and packaged into an APK and/or AAB file. The resulting application package is available for downloading, installation, and use on user devices with the instrumentation having been automatically added and without access to the original source code.

Abstract: Disclosed in the present application are a display apparatus and a processing method. According to the method, a data stream from the external device in connection with the display apparatus is received; a device information frame in the data stream is obtained, where the device information frame is a data frame generated by the external device according to a basic transmission protocol between the external device and the display apparatus; marker bits in the device information frame are traversed; in response to the external device supporting the automatic control protocol, a play mode is switched according to usage scenario information added in the data stream; and in response to the external device not supporting the automatic control protocol, a play mode is switched according to a device type of the external device.

Abstract: Various embodiments of the present disclosure provide a method for beamforming. The method which may be at a network node and includes: obtaining channel information of a terminal device; determining a self-correlation factor of the terminal device according to the channel information; determining main lobe width according to a relationship between self-correlation factor and main lobe width; determining a weight vector on at least one transmitting antenna according to the determined main lobe width; and transmitting a message using the weight vector on the at least one transmitting antenna, to the terminal device.

Abstract: The present disclosure provides an underwater detection method for contact leakage of a tunnel joint of a dam culvert, including: obtaining an underwater image sequence of the culvert by an underwater robot; preprocessing and registering the underwater image sequence; extracting particle information appearing in the underwater image sequence based on the registered underwater image sequence; constructing a three-dimensional fluid velocity distribution map based on the particle information, and determining leakage situation according to the three-dimensional fluid velocity distribution map; and superimposing the three-dimensional fluid velocity distribution map on a preconfigured three-dimensional culvert model, and rendering and displaying it.

Abstract: Disclosed are a test routes planning method and apparatus of a vehicle on actual roads, a medium and a device. The method includes the following steps: dividing road traffic scenes; calculating traffic scene characteristics based on the divided road traffic scenes; constructing a preliminary road selection database for test routes; and completing a planning of the test routes of the vehicle on the actual roads at different speeds in different traffic scenes by leveraging a genetic algorithm based on the preliminary road selection database for the test routes. The present disclosure provides a solution for planning the test routes of the vehicle on the actual roads. In the solution, the travel speed distribution of a user is obtained through calculation based on traffic flow big data, and the planning of the test routes on the actual roads in different traffic scenes is completed by leveraging the genetic algorithm.

Abstract: A system in a vehicle includes a lidar system to transmit incident light and receive reflections from one or more objects as a point cloud of points. The system also includes processing circuitry to identify planar points and to identify edge points of the point cloud. Each set of planar points forms a linear pattern and each edge point is between two sets of planar points, and the processing circuitry identifies each point of the points of the point cloud as being within a virtual beam among a set of virtual beams. Each virtual beam of the set of virtual beams representing a horizontal band of the point cloud.

Abstract: A method includes extracting, by an analysis computer, a plurality of first datasets from a plurality of graph snapshots using a structural self-attention module. The analysis computer can then extract at least a second dataset from the plurality of first datasets using a temporal self-attention module across the plurality of graph snapshots. The analysis computer can then perform graph context prediction with at least the second dataset.

Abstract: A lithium salt-free composite solid electrolyte membrane and a preparation method thereof are provided. The composition of the lithium salt-free composite solid electrolyte membrane includes: micro-nanoscale garnet-type solid electrolyte and polymer; where a mass ratio of the micro-nanoscale garnet-type solid electrolyte to the polymer is (60-100):(5-40); a particle size of the micro-nanoscale garnet-type solid electrolyte is 100 nm-2 ?m. The disclosure also provides a preparation method for the lithium salt-free composite solid electrolyte membrane. The lithium salt-free composite solid electrolyte membrane prepared by the disclosure has controllable morphology and thickness, and does not need to add lithium salt and be equipped with anhydrous and inert environment atmosphere, so that the production cost can be significantly reduced, and large-scale production is easy.

Abstract: A display substrate is disclosed, including a base substrate, multiple data lines, multiple sub-pixels, multiple data lead-out lines, and at least one first compensation unit. The base substrate includes a display area and a first bezel area located on a side of the display area. The multiple data lines and the plurality of sub-pixels are located in the display area. The multiple data lead-out lines are located in the first bezel area and electrically connected with the plurality of data lines in the display area. The at least one first compensation unit is located in the first bezel area. At least one data lead-out line is electrically connected with the at least one first compensation unit, and the at least one first compensation unit is configured to compensate at least one of resistance and capacitance of a data line electrically connected with the at least one data lead-out line.

Abstract: Ligand-capped inorganic particles, films composed of the ligand-capped inorganic particles, and methods of patterning the films are provided. Also provided are electronic, photonic, and optoelectronic devices that incorporate the films. The ligands that are bound to the inorganic particles are composed of a cation/anion pair. The anion of the pair is bound to the surface of the particle and at least one of the anion and the cation is photosensitive.

Abstract: Disclosed is a near eye display apparatus, comprising a display screen and an imaging system. The imaging system comprises a biconvex lens, a transflective plane mirror and a transflective curved mirror. The biconvex lens is configured to magnify a display image of the display screen; the transflective plane mirror is configured to receive imaging light from the biconvex lens and reflect same to the transflective curved mirror; and the transflective curved mirror is configured to converge the imaging light and reflect same to the position(s) where human eyes are located.

Abstract: A multilevel converter system is provided. The system includes a converter and a converter controller interfaced with the converter. The converter controller includes a voltage loop, a current loop, and a voltage compensation loop. The voltage loop is configured to receive first and second voltages from the first and second segments of the converter and a reference voltage. The current loop is configured to receive a current output of the converter, a reference current, and a balancing reference current. The voltage compensation loop is configured to receive the first and second voltages and a sign signal. The converter controller is configured to generate first and second pulse-width modulation (PWM) signals using output signals from the current loop and the output compensation signals from the voltage compensation loop. The PWM signals are configured to control the switches of the converter and to balance the first voltage with the second voltage.

Abstract: In implementations of the subject matter as described herein, there is provided a method for forgery detection of a face image. Subsequent to inputting a face image, it is detected whether a blending boundary due to the blend of different images exists in the face image, and then a corresponding grayscale image is generated based on a result of the detection, where the generated grayscale image can reveal whether the input face image is formed by blending different images. If a visible boundary corresponding to the blending boundary exists in the generated grayscale image, it indicates that the face image is a forged image; on the contrary, if the visible boundary does not exist in the generated grayscale image, it indicates that the face image is a real image.

Abstract: The present invention provides a refrigerator door, comprising a door housing, a door liner, a decorative strip connected between the door liner and the door housing, a thermal insulation chamber formed between the door housing and the door liner, and a storage device mounted on the door liner. The refrigerator door further comprises a power supply module used to supply power to the storage device. The power supply module has a pre-embedded component fixed in the thermal insulation chamber and exposed by the door liner, a power supply line passing through the pre-embedded component from the thermal insulation chamber and leading out, and a connection mechanism disposed between the pre-embedded component and the storage device and electrically connected to the power supply line. The refrigerator door of the present invention can prevent the occurrence of leakage during a foaming process.

Abstract: An inverter junction box is provided that includes a cover plate and a knockout pin. The cover plate is detachably connected with a top part of a casing; the knockout pin has one end that is detachably connected with a bottom part of the cover plate, and another end that can abut against a protection device on an inverter. One side of the casing has a connecting part that is connected with an external cable. A bottom part of the casing is a hollow structure and abuts against an incoming terminal of the inverter.

Abstract: A capacitor structure and a power converter are provided. The capacitor structure includes a parallel cell combination, and the parallel cell combination includes a plurality of cells and a plurality of current collectors. In the parallel cell combination: the cells are connected in parallel, and the poles connected in parallel are respectively connected with other devices through corresponding confluence points. Same poles of two adjacent cells are connected through a corresponding current collector, and the current-carrying specifications of each current collector is lower than the current-carrying requirements of a confluence point of a corresponding pole. That is to say, a conductor that implements the parallel connection of the cells is no longer a whole copper plate, but the individual current collectors, thus realizing the reduction of the cost of the conductor material.