Abstract: An electromagnetic ultrasonic double wave transducer, comprising a shell (1), and a permanent magnet assembly, a coil (4), a shielding layer (5), and a wire (6) which are provided in the shell (1). The permanent magnet assembly comprises a first permanent magnet (2) and a second permanent magnet (3) sleeved on the first permanent magnet (2). The magnetizing directions of the first permanent magnet (2) and the second permanent magnet (3) are perpendicular to the bottom of the shell (1), and the magnetic field directions of the first permanent magnet (2) and the second permanent magnet (3) are opposite. A non-conducting non-magnetic bushing material (9) is provided between the first permanent magnet (2) and the second permanent magnet (3), and upper end faces of the first permanent magnet (2) and the second permanent magnet (3) realize magnetic circuit closing by means of a magnetic circuit closing element (8).

Abstract: The present application discloses a multi-region plasma shell-and-tube reactor comprising a shell body. At least two reaction regions are provided inside the shell body, and a horizontal separation panel is provided between any two adjacent reaction regions, used to separate the two and passing through the tubes. A central hole is provided in the center of any horizontal separation panel, and at least one auxiliary hole distributed around the central axis of the central hole is provided in any horizontal separation panel so as to cooperate with the central hole to cause a vortex state to be formed in a reaction region.

Abstract: An application-level memory control group of a first application may be created when the first application is opened. An anonymous page of the first application is added to a least recently used linked list of the application-level memory control group, and a file page of the first application is added to a global least recently used linked list. An application-level memory control group is created in a dimension of an application, and an anonymous page of the application is managed in a refined manner. In addition, a file page of the application-level memory control group may be managed based on a global least recently used linked list.

Abstract: A data encoding and decoding method for underwater acoustic networks (UANs) based on an improved online fountain code, including: in a build-up phase, subjecting all original packets to sequential encoding according to their serial numbers to generate and send encoded packets with degree 2; merging k original packets to k/8 connected components with a size of 8; performing random encoding until a largest connected component is successfully decoded; in a completion phase, sending, by a receiver, a feedback packet according to a current decoding graph; according to a feedback packet containing decoding states of all the original packets, sending, by a sender, encoded packets with degree m; and randomly selecting original packets for recursive encoding to generate and send encoded packets with degree 1 or 2; and setting, by the receiver, a threshold to restrict the number of feedback packets.

Abstract: Provided is a method for presenting resources. The method includes: playing, in response to a launch operation on an application, a first media resource of a target activity in an initialization page of the application, wherein an activity interaction control is presented in a resource screen of the first media resource; displaying, in response to an interaction operation on the activity interaction control, the activity interaction control performing an action corresponding to the interaction operation; and presenting a second media resource of the target activity.

Abstract: A data encoding and decoding method for underwater acoustic networks (UANs) based on an improved online fountain code, including: in a build-up phase, subjecting all original packets to sequential encoding according to their serial numbers to generate and send encoded packets with degree 2; merging k original packets to k/8 connected components with a size of 8; performing random encoding until a largest connected component is successfully decoded; in a completion phase, sending, by a receiver, a feedback packet according to a current decoding graph; according to a feedback packet containing decoding states of all the original packets, sending, by a sender, encoded packets with degree m; and randomly selecting original packets for recursive encoding to generate and send encoded packets with degree 1 or 2; and setting, by the receiver, a threshold to restrict the number of feedback packets.

Abstract: This application provides an information processing method, an apparatus, a device, and a system. The information processing method includes: A host chip determines first information, where the first information includes a first logical address set. The host chip generates first indication information, where the first indication information includes the first logical address set and a first physical address set that is determined based on a mapping relationship between a logical address and a physical address and that corresponds to the first logical address set, the first physical address set includes N physical addresses, the N physical addresses are in a one-to-one correspondence with N logical addresses included in the first logical address set, and N is an integer greater than or equal to 2. The host chip sends a first request to a storage chip connected to the host chip, where the first request includes the first indication information.

Abstract: The present disclosure provides an electrical connector module, comprising a first housing, a first connecting board, and a plurality of first connectors. The first housing comprises a first accommodating part. The first connecting board is disposed at one side of the first housing. The plurality of first connectors are disposed in the first accommodating part at intervals along a first direction. The connector assembly comprises an electrical connector module according to the above embodiment, and a mating connector module. The mating connector module comprises a second housing, a second connecting board, and a plurality of second connectors. The second housing is disposed at one side of the second connecting board. The second housing comprises a second accommodating part. The plurality of second connectors is disposed in the second accommodating part along the first direction at intervals. The plurality of second connectors are respectively mated with the plurality of first connectors.

Abstract: A mask plate and a mask sheet are provided. The mask plate includes a first mask sheet and a second mask sheet, the first mask sheet includes a first mask area located in a middle region of the first mask sheet and first peripheral areas located on both sides of the first mask area in a first direction, a thickness of the first mask area is less than a thickness of the first peripheral areas to form a first concave portion; the second mask sheet includes a second mask area located in a middle region of the second mask sheet and second peripheral areas located on both sides of the second mask area in a second direction, a thickness of the second mask area is less than a thickness of the second peripheral areas to form a second concave portion.

Abstract: A display substrate is provided. The display substrate includes: a plurality of pixel unit groups arranged in rows, each of the pixel unit groups including: a first-color sub-pixel unit, and a ring-shaped second-color sub-pixel unit surrounding the first-color sub-pixel unit.

Abstract: A method for manufacturing a negative electrode for a lithium secondary battery is provided in which the method is capable of effectively performing pre-lithiation. While a negative electrode is compressed with a press, a lithium alloy layer is formed on a portion in contact with a negative electrode active material layer of upper and lower plates of the press, and a negative electrode tab is electrically connected to the press through a connection part respectively disposed on the upper and lower plates of the press, and thus, it is possible to manufacture a negative electrode for a lithium secondary battery in which the pre-lithiation of the negative electrode may be performed at time of compression even without a separate pre-lithiation process.

Abstract: A method of preparing a lithium secondary battery is provided which may effectively perform pre-lithiation, wherein, a closed square band-shaped lithium foil having an opening formed at a center thereof is prepared during the preparation of the lithium secondary battery, and a negative electrode is disposed in the opening of the lithium foil, but pre-lithiation of the negative electrode may be performed without a separate pre-lithiation process by disposing the negative electrode and the lithium foil so as not to overlap with each other and disposing a negative electrode tab so as to be in contact with the lithium foil.

Abstract: A mask sheet, a mask plate and an assembling method thereof are disclosed. The mask sheet includes at least one mask region and a peripheral region surrounding the mask region; at least one edge portion of the mask sheet in the peripheral region includes a thickness reduced portion.

Abstract: This application provides an information processing method, an apparatus, a device, and a system. The information processing method includes: A host chip determines first information, where the first information includes a first logical address set. The host chip generates first indication information, where the first indication information includes the first logical address set and a first physical address set that is determined based on a mapping relationship between a logical address and a physical address and that corresponds to the first logical address set, the first physical address set includes N physical addresses, the N physical addresses are in a one-to-one correspondence with N logical addresses included in the first logical address set, and N is an integer greater than or equal to 2. The host chip sends a first request to a storage chip connected to the host chip, where the first request includes the first indication information.

Abstract: A circuit device includes a circuit board having several contacts disposed on a first face of the circuit board and a connector disposed on a second face of the circuit board. The circuit board includes a hollow part, and the hollow part is defined through the circuit board from the first face of the circuit board to the second face of the circuit board. The circuit device includes several cables. One of two ends of each cable is on the first face of the circuit board and is connected to the corresponding contact, and the other end of each cable passes through the hollow part of the circuit board to the second face of the circuit board and extends outwardly.

Abstract: A display substrate, a display device and a display method thereof, and a mask plate are provided. The display substrate includes: a plurality of pixel unit groups arranged in rows, each of the pixel unit groups including: a first-color sub-pixel unit, and a ring-shaped second-color sub-pixel unit surrounding the first-color sub-pixel unit.

Abstract: The present disclosure provides a strap unlocking mechanism adapted for a cable plug and a connector. The strap unlocking mechanism comprises an elastic latch, a strap and an abutting rod. The elastic latch comprises a locking portion and an unlocking elastic piece disposed on the cable plug. The unlocking elastic piece is connected to one side of the locking portion. One end of the strap is connected with the unlocking elastic piece. The abutting rod is disposed on the cable plug and abuts against a surface of the strap close to the unlocking elastic piece. A first pull end and a second pull end are defined on the strap by the abutting rod. The extension direction of the first pull end and the extension direction of the second pull end being different.

Abstract: A circuit device includes a circuit board having several contacts disposed on a first face of the circuit board and a connector disposed on a second face of the circuit board. The circuit board includes a hollow part, and the hollow part is defined through the circuit board from the first face of the circuit board to the second face of the circuit board. The circuit device includes several cables. One of two ends of each cable is on the first face of the circuit board and is connected to the corresponding contact, and the other end of each cable passes through the hollow part of the circuit board to the second face of the circuit board and extends outwardly.

Abstract: A mask plate and a mask sheet are provided. The mask plate includes a first mask sheet and a second mask sheet, the first mask sheet includes a first mask area located in a middle region of the first mask sheet and first peripheral areas located on both sides of the first mask area in a first direction, a thickness of the first mask area is less than a thickness of the first peripheral areas to form a first concave portion; the second mask sheet includes a second mask area located in a middle region of the second mask sheet and second peripheral areas located on both sides of the second mask area in a second direction, a thickness of the second mask area is less than a thickness of the second peripheral areas to form a second concave portion.

Abstract: A double-layer mask component includes a first mask, a first mask frame, a second mask and a second mask frame. The first mask is fixed on the first mask frame, and a first clamping portion is provided within a region which is located on a surface of the first mask frame with the first mask fixed thereon and not covered by the first mask. The second mask is fixed on the second mask frame, and a second clamping portion is provided within a region which is located on a surface of the second mask frame with the second mask fixed thereon and not covered by the second mask. The surface of the first mask frame and the surface of the second mask frame are arranged in opposite, and the first clamping portion and the second clamping portion are clamped, so that the first mask fits with the second mask.