Abstract: Magnetic resonance imaging (MRI) systems and compositions thereof are provided. The MRI systems may include a main magnet configured to generate a primary magnetic field, the primary magnet forming a bore. The MRI system may include a gradient coil arranged in the bore and configured to generate a gradient magnetic field that provides a magnetic field environment with the main magnetic field. The gradient coil may include a shielding gradient coil including two or more coil units. One of the two or more coil units may be wound along a first coil path. Another one of the two or more coil units may be wound along a second coil path. The MRI system may also include a shimming structure arranged between the gradient coil and the primary magnet and configured to homogenize the main magnetic field.

Abstract: The disclosure provides an optical fiber splice closure including a closure cap and a base. The base includes an end cover and a sealing component, the end cover and the closure cap are connected to form a sealed cavity, an installation groove is formed in the end cover, a through hole communicating with the sealed cavity is formed in a bottom of the installation groove, the sealing component includes a sealing piece, a separator and an installation piece, the sealing piece includes a first pressing piece, a sealing block and a second pressing piece provided with first, second and third installation holes, respectively, which communicate with one another in sequence to form an optical cable hole, optical cables penetrate through the optical cable hole and the through hole and enter the sealed cavity, the separator is arranged in the optical cable hole to separate the optical cables from one another.

Abstract: Provided are a method for preparing a curved piezoelectric single crystal composite material, and the application thereof. The preparation method includes: step 1, designing a curved-surface 3D printed mesh mold and forming the curved-surface 3D printed mesh mold by printing; step 2, cutting a blocky piezoelectric phase into a plurality of small piezoelectric columns; step 3, inserting the small piezoelectric columns into empty cells of the 3D printed mold; step 4, filling gaps between the piezoelectric columns and the 3D printed mold with a non-piezoelectric phase such as an epoxy resin, and curing and forming the non-piezoelectric phase; and step 5, grinding, polishing, and ultrasonically cleaning a prepared sample, and then performing an electrode coating operation on the sample to obtain a curved-surface piezoelectric composite material.

Abstract: A display module and a display device are provided. The display module includes a display panel (1), which has a display region (AA) and a light-transmitting region (BB), the light-transmitting region (BB) being provided with a light-transmitting hole (V1); a flexible cover plate (2), which is located on the light exit side of the display panel (1), and covers the display region (AA) and the light-transmitting region (BB); a transparent supporting structure (3), which is located on the side of the display panel (1) facing the flexible cover plate (2), where the transparent supporting structure (3) covers the light-transmitting hole (V1), and an orthogonal projection of the transparent supporting structure (3) on the flexible cover plate (2) and an orthogonal projection of the display panel (1) on the flexible cover plate (2) have an overlapping region.

Abstract: An apparatus, including an electro-optical modulating means is for phase modulating a light signal with a range measurement code and a light beam isolation code; an electro-optical detecting means for receiving a reflected light signal of the phase modulated light signal reflected by an object and converting the received reflected light signal into an electronic data signal; and processor means for correlating the electronic data signal with the light beam isolation code and the range measurement code to obtain a range to the object.

Abstract: A display panel and a display device are provided. In the display panel, a first electrode of a first transistor is electrically connected to a first signal line, a second electrode of the first transistor is electrically connected to a first electrode of a second transistor through a first connecting portion, a second electrode of the second transistor is electrically connected to a light-emitting element, and the first connecting portion is disposed on one side, away from a substrate, of an active layer, which facilitates reducing a layout space of sub-pixels, to facilitate adaptation to the demands for displaying in high resolution and high definition.

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.