Abstract: This application discloses an antenna system, including a plurality of antenna groups. Each antenna group includes two antenna array planes and one mounting panel. The two antenna array planes are symmetrically mounted on two planes of the mounting panel. Each antenna array plane includes at least one antenna element. The two antenna array planes in each antenna group work simultaneously. The antenna system includes a plurality of radiation areas, and each radiation area is formed by cooperative radiation of beams from a plurality of antenna array planes in different antenna groups. In this application, more antenna array planes can be deployed in the antenna system. Therefore, overall coverage of the antenna system is improved without additional wind resistance. In addition, each radiation area is formed by cooperative radiation of a plurality of antenna array planes. Therefore, a capacity and a gain of the antenna system are also improved.

Abstract: A signal transmission method and a communication apparatus are provided. The method includes: A network device sends at least two synchronization signals, where a time interval between every two adjacent synchronization signals in the at least two synchronization signals is less than or equal to a first value, and the at least two synchronization signals include a first synchronization signal; and the network device sends a wake-up signal after sending the first synchronization signal, where the wake-up signal is used to wake up at least one terminal device, a time interval between the first synchronization signal and the wake-up signal is less than or equal to a second value, and the first value is greater than the second value. The method may be applied to a communication system, for example, 5G or NR, LTE, V2X, D2D, M2M, MTC, the internet of things, a future communication system, or the like.

Abstract: The present invention provides an auxiliary pre-charging device for a power converter. The power converter includes at least one power unit with an input end being connected to a medium and high voltage AC power source, and an output end being connected to a low voltage DC bus, wherein the auxiliary pre-charging device includes a switch, a transformer, a pre-charging resistor, and a rectifier sequentially connected in series, one end of the switch is connected to the medium and high voltage AC power source, and an output end of the rectifier is connected to the low voltage DC bus. The present invention also provides a pre-charging method for a power converter, which uses the aforementioned auxiliary pre-charging device to start pre-charging at the low-voltage output end of the power converter.

Abstract: A cleaning apparatus and a control method thereof, a device, a base station, a system, and a storage medium are provided in embodiments of the disclosure. The cleaning system at least includes a cleaning apparatus and a first base station for being used in cooperation with the cleaning apparatus. The cleaning apparatus includes a first energy storage and a first electrical connector connected with the first energy storage, and the first base station includes a second electrical connector and a power consumer connected with the second electrical connector. When the cleaning apparatus is docked with the first base station to couple the first electrical connector with the second electrical connector, the first energy storage supplies power to the power consumer of the first base station through the first electrical connector and the second electrical connector.

Abstract: The application discloses a method for preparing 5-hydroxymethylfurfural and belongs to the technical field of synthesis of 5-hydroxymethylfurfural, mainly using biomass sugar as raw material and catalyzing the sugar to prepare 5-hydroxymethylfurfural in a tubular reactor filled with catalyst particles. In the application, the preparation of the humin-supported Sn catalyst is simple and has mild reaction conditions; the catalyst, as a high value-added product of humin, has good catalytic efficiency; the preparation of 5-hydroxymethylfurfural using the catalyst has the advantages of high yield, low cost and the like; the tubular reactor adopted can reduce backmixing, greatly shorten the reaction time and reduce the generation of humin and can also be equipped with inline monitoring equipment to monitor the preparation of HMF in a timely manner. Therefore, the application has the advantages of simple process, low energy consumption, high yield, cost saving, and the like.

Abstract: An information transmission method and an apparatus, a base station, a user equipment, a storage medium, and a program product are disclosed. The method may include: receiving a transport block (TB) sent by at least one second node, where the TB forms a TB set; obtaining information about a set of correct TBs according to the RB set; encoding the information about the set of correct TBs to obtain feedback information, where the feedback information is used to represent a reception condition of the TB sent by the at least one second node, and the encoding processing may include performing binary representation on the information about the set of correct TBs; and sending the feedback information to the at least one second node.

Abstract: A compound having a BCL-XL protein degradation function as shown in Formula I and a use thereof in preparation of a drug for diseases associated with BCL-XL activity.

Abstract: A method includes: determining, a first pixel in a receiving field of view of a radar and N sampling point sets in an echo signal corresponding to the first pixel; estimating an estimated distance between the radar and a target object based on each first sampling point set of the N sampling point sets, and determining, based on each estimated distance, M cumulative receiving fields of view in a one-to-one correspondence with M data frames; determining a second sampling point set in echo signals corresponding to Q neighboring pixels, and superposing each first sampling point set and the corresponding second sampling point set to obtain an echo signal that corresponds to the first pixel and that is obtained; and calculating an actual distance between the radar and the target object based on the echo signal obtained after superposition processing.

Abstract: A composition and a use of the composition in the preparation of a medicament for treating eye diseases. The composition includes 0.5-1.5% by weight of a muscarinic acetylcholine receptor M3 agonist; 0.005-0.5% by weight of naphazoline, a pharmaceutically acceptable salt thereof or a combination thereof; and 0.1-1% by weight of ketorolac tromethamine. While enhancing the effect of a muscarinic acetylcholine receptor M3 agonist such as a pilocarpine active ingredient in treating presbyopia, the composition effectively significantly reduces or even eliminates side effects caused by the pilocarpine active ingredient.

Abstract: A UE may identify a first set of preserved resources of one or more sets of preserved resources. An aircraft-borne device may identify a first set of preserved resources of one or more sets of preserved resources. The first set of preserved resources may be associated with a time domain starting point, a time domain duration, and a frequency domain resource allocation. The UE may transmit, to an aircraft-borne device and the aircraft-borne device may, receive from the UE, over at least part of the first set of preserved resources, a synchronization signal and a first payload message. The first payload message may include a first emergency message and may be transmitted and received via one of a first PUSCH, a first PSSCH, or a PSCCH. The aircraft-borne device may forward, to a base station or another aircraft-borne device, at least the first emergency message.

Abstract: Acoustic sensor and manufacturing method. The acoustic sensor includes: a base including a first silicon layer, a first oxide layer and a second silicon layer stacked, and a back cavity; a second oxide layer formed on the base; a piezoelectric unit formed on the second oxide layer and including a first electrode layer, a piezoelectric layer and a second electrode layer stacked; a first slit formed at a middle portion of the second electrode layer and passing the second electrode layer, the piezoelectric layer and the first electrode layer; a second slit formed at a middle portion of the second silicon layer and passing the second silicon layer and the second oxide layer; an additional membrane filled in the first slit and not filled in the second slit. The SPL and structural reliability are effectively improved, and the material type is not limited by dry film type materials.

Abstract: The present disclosure relates to the technical field of semiconductors, and provides a semiconductor structure and a manufacturing method thereof. The semiconductor structure includes: a substrate; a bit line located on the substrate; and a support layer located on the substrate, wherein the support layer includes a first support segment and a second support segment, the first support segment and the second support segment are both connected to the bit line, and the bit line is located between the first support segment and the second support segment.

Abstract: The embodiments of the present disclosure provide a method for extracting xylose liquid and cellulose with high purity from corn straw. The method includes raw material screening, raw material preprocessing, alkali processing, acid hydrolysis, and gradient alkali processing. The embodiments of the present disclosure adopt a gradient selective refining method for extracting a high-purity xylose liquid and cellulose from the corn straw, so as to maximize the extraction of the xylose from the corn straw, and at the same time, to separate and extract a high-purity cellulose product from straw residue under a low-cost process processing.

Abstract: A lower vehicle body rear structure includes a rear floor integrally formed in a die-casting mode, rear floor longitudinal beam rear sections fixedly connected to the rear floor, a shelf, and a spare tire cabin. Rear floor longitudinal beams arranged on the two sides of the rear floor, and a rear floor middle cross beam and a rear floor rear cross beam which are connected between the rear floor longitudinal beams are formed on the rear floor, and rear wheel covers connected to the rear floor longitudinal beams are respectively arranged on the two sides of the rear floor. The shelf is located above the rear floor, and the two ends of the shelf are connected to the rear wheel covers by means of connecting plates; and the rear floor, the shelf and the two connecting plates are connected to form an annular structure.

Abstract: A system includes: a DC bus electrically configured for connection to one or more of a rectifier and an inverter, the DC bus including a positive bus and a negative bus; and a DC link electrically connected to the DC bus. The DC link includes: an energy storage apparatus includes at least two energy storage elements; and a fuse assembly electrically connected the energy storage apparatus and to one of the positive bus and the negative bus.

Abstract: The present invention belongs to the field of biopharmaceuticals and relates to an anti-DKK1 antibody, a pharmaceutical composition thereof, and use thereof. Specifically, the present invention relates to an anti-DKK1 antibody or an antigen-binding fragment thereof, wherein the anti-DKK1 antibody comprises a heavy chain variable region comprising HCDR1 to HCDR3 and a light chain variable region comprising LCDR1 to LCDR3, wherein the amino acid sequence of HCDR1 is selected from SEQ ID NO: 1, etc., the amino acid sequence of HCDR2 is selected from SEQ ID NO: 2, etc., the amino acid sequence of HCDR3 is selected from SEQ ID NO: 3, etc., the amino acid sequence of LCDR1 is selected from SEQ ID NO: 4, etc., the amino acid sequence of LCDR2 is selected from SEQ ID NO: 5, etc., and the amino acid sequence of LCDR3 is selected from SEQ ID NO: 6, etc.

Abstract: Methods and systems for techniques for quality of service (QOS) for supporting extended reality (XR) traffic include a method of wireless communication that includes receiving, by a first network function, from a second network function, a first indication that activates an extended reality traffic transmission optimization by which an efficiency of a transmission of payloads of a set of protocol data units having different importance is increased, transmitting, by the first network function, to a network node a request to activate the extended reality traffic transmission optimization, receiving, by the first network function, from the network node, a response to the request to activate the extended reality traffic transmission optimization, and activating, by the first network function, the extended reality traffic transmission optimization in a third network function.

Abstract: The present invention provides a MEMS piezoelectric speaker including a substrate with a back cavity, a diaphragm, a capacitive system and a flexible film. The diaphragm includes a fixed end, a suspended end. Adjacent suspended ends are at least partially spaced to form a slit. The suspended end includes a support section and a piezoelectric section. Along the thickness direction of the MEMS piezoelectric speaker, a flexible film is at least partially spaced from the diaphragm and the flexible film is spaced from the substrate. This design can improve the sound pressure level of the MEMS piezoelectric speaker in the middle and high frequency, and improve the acoustic performance of the MEMS piezoelectric speaker.

Abstract: The present disclosure provides a manufacturing method of a semiconductor structure, including: an insulating layer includes a first dielectric layer and a second dielectric layer, a protective layer covers an upper surface of the second dielectric layer and a bottom and sidewalls of the first trench; removing part of the protective layer to expose at least part of a surface of the second dielectric layer; removing the second dielectric layer by a first wet etching process, the first wet etching process has a first etch selectivity of a material of the second dielectric layer to that of the first dielectric layer; and removing the protective layer by a second wet etching process, the second wet etching process has a second etch selectivity of a material of the protective layer to that of the first dielectric layer, and the second etch selectivity is greater than the first etch selectivity.

Abstract: A large-space high-temperature and high-pressure true triaxial flexible loading device includes a cylinder reaction frame, which includes a cylinder, a lower shear ring, an upper shear ring, a bottom cover, and a top cover, wherein the bottom cover and the top cover are detachably mounted at a bottom and a top inside the cylinder respectively, and an interior of the cylinder is divided to form a loading space for performing a triaxial test on a square test block; the lower shear ring is detachably embedded on an inner wall of the cylinder below the bottom cover; the upper shear ring is detachably embedded on the inner wall of the cylinder above the top cover; a confining pressure reaction frame, mounted in the loading space around the square test block; and, flexible loading mechanisms, disposed in pairs at two opposed side surfaces of the square test block.