Abstract: Embodiments of this application disclose a security verification method and apparatus. The method includes receiving a first command from a network device, where the first command includes a first value, and the first command is one of a select command, a query command, a query repeat command, a query adjust command, or an acknowledgment command. The method further includes determining a first response value based on the first value and a security key; and sending a first request, where the first request includes the first response value, and the first response value is used by a verification function to verify a terminal device. According to embodiments of this application, communication security can be ensured.

Abstract: The present disclosure relates to a radiating element, and the radiating element includes: a radiator with a radiating arm, the radiator configured to emit first electromagnetic radiation within a predetermined first operating frequency band; and a parasitic metal pattern, where a resonant circuit is formed between the radiating arm of the radiator and the parasitic metal pattern, and the resonant circuit is configured to allow an operating current on the radiating arm within the first operating frequency band to pass, but prevent an inductive current induced on the radiating arm and within a second operating frequency band. In addition, the present disclosure also relates to a base station antenna having the radiating element (FIG. 4).

Abstract: The present application relates to a robotic lawn mower including a cutting assembly. The cutting assembly includes a first cutting disc and a second cutting disc, the first cutting disc has a first cutting area that is circular with a first center point and a first cutting radius, while the second cutting disc has a second cutting area that is circular with a second center point and a second cutting radius. The first cutting radius is R1. The second cutting radius is R2. A minimum distance between the first and second cutting areas is L1. A distance between projections of the first center point and the second center point in a width direction of a body is L2. An angle between a line connecting the first and second center points and the width direction of the body is ?, where 0°<??80°, R1>R2 and R1?R2<L2, and 0.01?L1/L2?0.6666.

Abstract: A lawn mower is provided. The lawn mower includes a gripping portion provided with a toothed structure having multiple tooth units. A first extension direction of each of the tooth units forms an included angle of 75° to 105° with a length direction of the gripping portion and is not perpendicular to a traveling direction; the tooth units are spaced apart along the length direction of the gripping portion, and projections of any two adjacent tooth units on a plane perpendicular to the length direction of the gripping portion at least partially overlap. There is a first spacing between any two adjacent tooth units along the gripping portion. A minimum gap between orthographic projections of any two adjacent tooth units on a plane perpendicular to the traveling direction forms a second spacing. A ratio of the first spacing to the second spacing is greater than 1 and less than 5.

Abstract: Methods, apparatus, systems and articles of manufacture are disclosed for scale recovery from monocular video. An example non-transitory computer readable medium comprises instructions that, when executed, cause a machine to at least segment an input image from a monocular video to detect an object in the camera field, estimate camera parameters from the segmented input image, iteratively refine the estimated camera parameters using known object heights, calculate a scale for the video, iteratively refine the scale based on a user input, and report the scaling results for visualization.

Abstract: A pixel driving circuit of the display panel includes a driving transistor and a data writing transistor. Signal lines include multiple data signal lines. The data writing transistor is coupled between a data signal line and a gate of the driving transistor. The signal lines also include multiple power signal lines. A power signal line includes a body portion and a connection portion. The connecting portion connects two adjacent body portions. The display panel also includes a substrate and a light-emitting element. The light-emitting element includes a first light-emitting element. The first light-emitting element includes a first anode. In a direction perpendicular to the plane in which the substrate is located, the first anode at least partially overlaps the data signal line, and the first anode at least partially overlaps the body portion.

Abstract: The present disclosure provides a data interaction method and apparatus and an electronic device. The method is applied to a cloud service end. A specific implementation of the method comprises: establishing a long-connection communication channel with a local service end, the local service end comprising a target transaction system to be integrated; receiving first target data sent by the local service end through the long-connection communication channel, the first target data being obtained based on updated first transaction data of the target transaction system; performing data update using the first target data. In the implementation, the target transaction system included by the local service end needn't to be exposed to an external network, thereby improving the security of data interaction, reducing the number of times of establishing the communication connection between the local service end and the cloud service end, and improving the efficiency of data interaction.

Abstract: A wireless communication method and apparatus are provided. The method includes: a first device obtains first information, which includes a correspondence between first customer premise equipment and at least one first terminal device, and a correspondence between the first terminal device and at least one second terminal device. The first device configures the first information on a second device, which uses the first information to verify that a received service packet is a service packet sent by the first terminal device to the second terminal device by using the first customer premise equipment. Therefore, accuracy of service packet transmission of an industrial terminal device can be ensured, an industrial terminal or customer premise equipment can be prevented from being attacked to some extent, a loss caused by the attack on the device is reduced, and information security of the industrial terminal device and an entire industrial field network is improved.

Abstract: Systems and methods are provided for notifying users about videos in a playback sequence. The systems and methods determine that a video that meets a criterion is currently available on a video server associated with a messaging client. In response to determining that the video that meets the criterion is currently available, the messaging client on the client device prefetches a sequence of videos from a recommendation engine that match a profile of a user associated with the messaging client. The recommendation engine is being used to provide sequence of videos to a video playback graphical user interface (GUI) that automatically plays back the videos in the sequence. The systems and methods determine that the video that meets the criterion is in a first position in the sequence of videos and, in response, present a notification that indicates the availability of the video on the video playback GUI.

Abstract: A display module includes a display panel, at least one driving chip, a supporting plate and a strengthening plate. The display panel includes a display portion, a bending portion and a lead-out portion. The display portion has a display surface and a non-display surface. The at least one driving chip is mounted on a side of the lead-out portion away from the display portion. The supporting plate is located on the non-display surface of the display portion. The strengthening plate is located between the supporting plate and the lead-out portion. A depression structure is provided in at least one surface of two opposite surfaces of the strengthening plate and the supporting plate; an orthographic projection of the depression structure in the at least one surface on the lead-out portion at least partially overlaps with an orthographic projection of the at least one driving chip on the lead-out portion.

Abstract: Embodiments of this application provide example communication methods, apparatuses, and systems. One example method includes sending, by a user equipment, a first uncharged traffic message to a core network device, where the first uncharged traffic message is for triggering the core network device to send a second uncharged traffic message to the user equipment. The user equipment receives the second uncharged traffic message from the core network device, where the second uncharged traffic message includes login information, and the login information allows the user equipment to log in to an application server. The user equipment sends the login information to the application server to log in to the application server. Both the first uncharged traffic message and the second uncharged traffic message are transmitted via a base station without generating to-be-charged traffic.

Abstract: The present application relates to a new type coil structure and a manufacturing method therefor. The new type coil structure comprises an inner coil, an insulating cylinder layer, an outer coil, and first angular rings, wherein the inner coil is arranged at an inner side of the insulating cylinder layer in a surrounding manner; the outer coil is arranged at an outer side of the insulating cylinder layer in a surrounding manner; and two first angular rings are provided in such a way that annular structures are formed by means of insulating tapes being wound around the two first angular rings and the two first angular rings are respectively positioned at two ends of the outer coil. By means of the first angular rings being respectively arranged at the two ends of the outer coil, the electric field intensity at the end portions of the outer coil can be reduced, such that the electric insulation performance of the new type coil structure is improved.

Abstract: The present disclosure provides a method for ammonia injection control of a denitrification system in thermal power plants considering the characteristics of incoming coal. A total amount ammonia injection control method for denitrification mainly employs a two-stage intelligent controller. A main-intelligent controller controls the total amount of ammonia injection based on the deviation value of the outlet NOx concentration, as well as the feedforward values of the denitrification inlet NOx concentration and the flue gas volume. A sub-intelligent controller for the total amount controls the opening degree of the total valve according to the deviation value of the amount of ammonia injection. The zonal control method for denitrification ammonia injection volume takes the deviation value of the outlet NOx concentration of each zone and the total ammonia injection volume as constraint condition to obtain the opening degree of the regulating valve in each zone.

Abstract: A method for correcting imbalance in IQ demodulation of optical fiber DAS data is disclosed. The method includes obtaining I/Q signals I0 and Q0 of each sampling on an optical fiber from a DAS acquisition instrument; performing DC bias correction on the I/Q signals I0 and Q0 to obtain I/Q signals I1 and Q1 after DC bias correction; performing amplitude imbalance correction on the I/Q signals I1 and Q1 after DC bias correction by using Hilbert transform to obtain I/Q signals I2 and Q2 after amplitude imbalance correction; and performing phase imbalance correction on the I/Q signals I2 and Q2 after amplitude imbalance correction by using Hilbert transform to obtain I/Q signals I3 and Q3 after phase imbalance correction. It is possible to perform accurate correction on I/Q signals, accurately and efficiently suppress optical fiber demodulation noise, and improve optical fiber DAS data acquisition quality.

Abstract: A method includes inserting a recorded pair of slope related delays associated with a driver into one selected set of data points; fitting a respective delay related to a layout of a wiring tree and parameters related to a set of switches that adds capacitive loading to the set of stages, wherein a maximum of an absolute value of one or more computed prediction errors is minimized. Corresponding values are computed for the delay related to the layout of the wiring tree and the parameters related to the set of switches that adds capacitive loading to the set of stages. The computed corresponding values for the delay related to a layout of the wiring tree and the parameters related to the set of switches that adds capacitive loading to the set of stages are recorded. A pair of slope related delays associated with the driver are recorded.

Abstract: A method for inverting a formation wave impedance using DAS borehole seismic data, including: acquiring an initial magnitude at a time window after the initial arrival time of seismic wavefield data in a well; mapping the initial magnitude to a relative wave impedance; and correcting the relative wave impedance to obtain an inverted wave impedance. Also provided are an apparatus for inverting a formation wave impedance using DAS borehole seismic data, a device, and a computer-readable storage medium.

Abstract: A method includes a first network device that obtains first biometric identification information of a user of a first terminal device, and sends, based on a first authentication request message that is received from a second network device and that is used to authenticate the user, the first biometric identification information to the second network device or a third network device. The first biometric identification information is used to perform identity authentication on the user of the first terminal device. According to embodiments of this disclosure, authentication on a natural person identity can be provided in communication.

Abstract: A cavity phase shifter comprises a first cavity, a first main phase shifter circuit, a first moveable phase shift component, and a first sliding linkage for the first moveable phase shift component mounted within the first cavity; and a second cavity, a second main phase shifter circuit, a second moveable phase shift component, and a second sliding linkage for the second moveable phase shift component mounted within the second cavity. The first and second cavities are arranged side by side in a horizontal direction, and first and second grooves for at least partially exposing the respective first and second sliding linkages are provided on the cavity phase shifter. The first and second grooves are arranged side by side in the horizontal direction, and a dimension of the second groove is different from a dimension of the first groove.

Abstract: A liquid-crystal-on-silicon device includes a substrate, a thermally-conductive layer, an LCOS display panel, a printed circuit layer, and a resistive heating element. The thermally-conductive layer is on the substrate and has a thermally-conductive central region surrounded by a thermally-conductive periphery region. The LCOS display panel is on the thermally-conductive central region. The printed circuit layer is on the thermally-conductive periphery region and at least partially surrounding the LCOS display panel. The resistive heating element is electrically connected to the printed circuit layer, thermally connected to the thermally-conductive periphery region. At least part of the resistive heating element is directly above or directly below the thermally-conductive periphery region.