Abstract: This application provides a positioning reference signal sending method and a related apparatus. The method includes: receiving identification information, positioning reference signal (PRS) indication information, and PRS identification information of a terminal device from a location management function network element; sending the PRS identification information to the terminal device; and sending a first PRS to the terminal device. Based on the foregoing technical solutions, the terminal device may receive a PRS of another type other than a periodic PRS. Therefore, more PRSs are used for location measurement. In this way, positioning precision can be improved.

Abstract: A method for preparing a shell-bionic ceramic tool and a shell-bionic ceramic tool, wherein the shell-bionic ceramic tool includes alternating stacks of ceramic powders with different components, pressing a ceramic green body using a cold briquetting method, carrying out pre-pressing once using a graphite indenter on a working surface thereof after each layer of the ceramic powder being loaded, and pressing a last layer using a graphite rod, and then pressing a whole ceramic green body with a certain pressure to promote a bonding of the layers of ceramic powder, which in turn gives a complex shape to an interface between the layers, increases a bonding area between the layers, and plays the role of hindering crack expansion, extending the crack expansion path, and improving the bonding strength of the interface; after then, hot-pressed sintering is used to densify the ceramic green body to obtain the shell-bionic ceramic tool.

Abstract: Joint opening structures of 3D memory devices and fabricating method are provided. A joint opening structure comprises a first through hole penetrating a first stacked layer and a first insulating connection layer, a first channel structure at the bottom of the first through hole, a first functional layer on the sidewall of the first through hole, a second channel structure on the sidewall of the first functional layer, a third channel structure over the first through hole, a second stacked layer on the third channel structure, a second insulating connection layer on the second stacked layer, a second through hole penetrating the second stacked layer and the second insulating connection layer, a second functional layer disposed on the sidewall of the second through hole, a fourth channel structure on the sidewall of the second functional layer, and a fifth channel structure over the second through hole.

Abstract: A hydrogel for cell-laden bioprinting, bioink, and a preparation method and an application thereof, relates to the technical field of biomedical polymer hydrogels. The hydrogel for cell-laden bioprinting is polymer gel formed by adding a cell-specific material into a matrix of alginate and gelatin and crosslinking and curing, wherein the cell-specific material is polypeptide selected according to different laden cells. The structures printed using the hydrogel may have the advantages such as adjustable mechanical properties, adjustable porosity, high biocompatibility, high printing accuracy, and high customizability, which may widely support the printing of human tissues and organs such as spinal cord, cartilage, and heart, and has good prospects for applications in tissue repair, organ transplantation and so on.

Abstract: A method for processing a plurality of queries is provided according to embodiments of the present disclosure. In this method, based on a plurality of queries and an execution plan for the plurality of quires, a plurality of record identification (ID) numbers can be stored into a pool in a numerical order. Each of the plurality of record ID numbers can identify a data record in a database. Then, the execution plan can be performed to batch a plurality of data records corresponding to the plurality of record ID numbers in the database based on a distribution of the plurality of record ID numbers in the pool.

Abstract: The following is directed to an abrasive particle having a body including a core and a coating overlying at least a portion of the core. The coating can include a content of lithium. In an embodiment, the coating can further include silicon, oxygen, or a combination thereof.

Abstract: The present disclosure pertains to the field of health monitoring technologies, and discloses a life early warning system based on sensor acquisition, including a sign sensor, a camera, a location analysis module, an attachment location correction module, a sign detection module, an alarm feedback module, a detection optimizer, a medical comparison library, a medical platform, and a client, where the sign sensor is configured to attach to a specified location of a user body, and acquire user sign information in real time. In the present disclosure, a location of the sign sensor is analyzed by using a cascade network, which can ensure accuracy of an attachment location of each sensor, avoid reduction in precision of subsequent detection due to a sensor location abnormality, greatly improve detection accuracy, further prevent an abnormal sign report due to misusing by a child, and improve user experience.

Abstract: The present disclosure discloses an optical measurement device and method for a plasma magnetic field with adjustable sensitivity. The method comprises the following steps: constructing an optical rotation measurement system based on a pulsed laser beam for measuring an optical rotation image and a shadow image; processing the optical rotation image and the shadow image, and obtaining a distribution of proportional coefficients based on alight intensity distribution; obtaining a distribution of rotation angles based on a mapping relationship between the proportional coefficients and the rotation angles; constructing an interference measurement system based on the pulsed laser beam, and measuring a phase shift of an interference image; calculating a distribution of electron areal densities based on the phase shift in the interference image; obtaining a two-dimensional distribution of an average magnetic field based on the rotation angles and the electron areal densities.

Abstract: An alumina-based ceramic tool material with low thermal expansion and a preparation process thereof, accordingly, the ceramic tool material may have both the high hardness of alumina ceramics after the hot pressing sintering, and reduces the thermal expansion coefficient of the overall ceramic material by adding the Sc2W3O12 as the negative thermal expansion phase, which improves the thermal shock resistance of ceramic tools in high-speed cutting engineering and meets the requirements of large temperature range during the machining of nickel-based superalloys. Moreover, the composite material does not use metal binder and has strong thermal stability even in the high-speed machining under extreme heat-force-chemistry coupling, so it has a high machining compatibility for nickel-based superalloys.

Abstract: A single-atomically dispersed metal/two-dimensional transition-metal dichalcogenide nanosheet hybrid comprising a plurality of single-atomically dispersed metal atoms disposed on at least one surface of a transition-metal dichalcogenide nanosheet, wherein the transition-metal dichalcogenide nanosheet is uniformly crystalline.

Abstract: A composite hydrogel for light-cured 3D cell-laden printing and a preparation method and application thereof. The composite hydrogel of the present disclosure combines advantages of gelatin methacryloyl, sodium carboxymethylcellulose, hyaluronic acid-glutamic acid polymer, and the like. The provided composite hydrogel for 3D printing has the characteristics of low toxicity, good biocompatibility and adjustable mechanical properties, can provide cells with a three-dimensional living environment, promotes cell adhesion and migration on gradient scaffolds, and is suitable for tissue engineering scaffolds and cell-laden printing of tissues. The printing process of a scaffold is simple and can be completed within a short time, and the porosity and mechanical properties of the 3D printed hydrogel scaffold can be adjusted by adjusting the proportion of HA-Glu and Col in the hydrogel system.

Abstract: A ceramic tool with integrated temperature sensing and cutting functions and preparation method and application thereof. The ceramic tool comprises a ceramic matrix, a positive thermoelectric layer and a negative thermoelectric layer being provided on two surfaces of the ceramic matrix; the ceramic matrix being formed by sintering a first matrix material, a first binding agent and a first reinforcing phase, and the thermoelectric layer being formed by sintering of a thermoelectric material; the first matrix material comprises one or more of Al2O3, Si3N4 and CBN; the first binding agent comprises one or more of Mo, Ni, Co, W and Cr; the first reinforcing phase comprises one or more of TiC, WC, SiC, MgO, Cr2O3, TiO2 and ZrO2; the thermoelectric material for the positive thermoelectric layer comprises ZrB2 and SiC; the thermoelectric material for the negative thermoelectric layer comprises ZrB2, SiC, and graphite.

Abstract: A method for processing a plurality of queries is provided according to embodiments of the present disclosure. In this method, based on a plurality of queries and an execution plan for the plurality of quires, a plurality of record identification (ID) numbers can be stored into a pool in a numerical order. Each of the plurality of record ID numbers can identify a data record in a database. Then, the execution plan can be performed to batch a plurality of data records corresponding to the plurality of record ID numbers in the database based on a distribution of the plurality of record ID numbers in the pool.

Abstract: A crack self-healing functionally gradient material for ceramic cutting tools and a preparation method thereof. The material for ceramic cutting tools has a symmetrical gradient structure, and based on the percentage by mass, components of each layer include 50%-80% of Ti(C7,N3), 25%-5% of (W7,Ti3)C and 20%-0% of TiSi2; contents of components of layers that are symmetrical relative to a central layer are the same and a thickness is symmetrically distributed; a content of Ti(C7,N3) gradually increases from the surface layer to the central layer, contents of (W7,Ti3)C and Ti Si2 gradually decrease by 5% from the surface layer to the central layer, and the contents of Ni and Mo gradually increase from the surface layer to the central layer.

Abstract: A vascular structure-containing large-scale biological tissue and a construction method thereof. In the existing three-dimensional cell culture, it is contradictory for the elastic modulus of the scaffold material in ensuring structural stability and biocompatibility, and the vascular structure is required to provide channels for nutrient exchange when a large-scale structure is prepared. A cell-laden matrix material is poured into a hollow scaffold serving as a supporting scaffold. The overall stability of the scaffold structure can be ensured by regulating the mechanical properties of the supporting scaffold, thereby resolving the contradiction in ensuring structural stability and biocompatibility for the mechanical properties of the scaffold material in the conventional three-dimensional cell culture. A coaxially printing outer material contains a thermosensitive material.

Abstract: A single-crystal ?-Ga2O3 MSM detector and a preparation method thereof, comprising: machining grooves on a single-crystal ?-Ga2O3 substrate using a laser-assisted waterjet machining technique to form a 3D shape; wet etching the machined single-crystal ?-Ga2O3 substrate using an HF solution to remove machining damage; performing Au evaporation on a surface of the single-crystal ?-Ga2O3 substrate after processing, coating an Au thin film on the surface of the single-crystal ?-Ga2O3 substrate; and grinding the surface of the single-crystal ?-Ga2O3 substrate after evaporation to remove the Au thin film on an undressed surface and retain the Au thin film in the grooves, and then obtaining the single-crystal ?-Ga2O3 MSM detector.

Abstract: This application provides a beam information obtaining method and an apparatus, relates to the field of communications technologies, and resolves a problem that resources of positioning reference signals are wasted because the positioning reference signals need to be omnidirectionally sent because of an unknown direction, of a terminal, caused by use of a beam, when the terminal is positioned in, e.g., a 5G system. The method in this application resolves the problem and saves overheads of sending a reference signal. The method includes: The terminal receives a beam information request sent by a location management device, where the beam information request is used to request the terminal to provide measurement information of a downlink beam. The terminal obtains beam information, where the beam information includes information about a reference signal that is sent by at least one network device and that is measured by the terminal.

Abstract: This application provides a reference signal generation method, a reference signal detection method, and a communications apparatus, so that a terminal device or a network device can generate a reference signal by using a pseudo-random sequence initial factor cinit provided in embodiments of this application. Compared with a solution in the current technology, the generation manner can support a relatively large quantity of reference signal sequences, to better meet requirements of a plurality of 5G scenarios. The method may include: obtaining a reference signal sequence based on a pseudo-random sequence initial factor cinit; and mapping the sequence to one or more OFDM symbols, where the pseudo-random sequence initial factor cinit is related to a parameter d, d max(log2(nID,max+1)?10,0) or d=max(log2 (nID,max+1)?12,0), max represents that a larger value is selected from two values, and nID,max represents a maximum value of a reference signal sequence ID.

Abstract: A ceramic tool material, in particular with piezoelectric effect and a preparation method thereof, and a cutting tool. The ceramic tool material includes the following raw materials by weight: 30-70 parts of matrix material, 30-70 parts of piezoelectric material, 5-10 parts of binder, and 10-20 parts of reinforcing phase and can be made into cutting tools. The cutting tool has a piezoelectric effect and excellent mechanical properties and can convert the cutting force signal into the charge signal during machining. By collecting charge signals, a cutting force can be measured and ceramic cutting tool condition can be monitored. Cutting force measurement function and high mechanical properties are integrated. A ceramic tool material with piezoelectric effect can measure the cutting force on the premise by meeting the cutting performance requirements.

Abstract: The present invention relates to the field of new materials technology, in particular to carbon nitride composite ceramic tool materials, preparation method and cutting tools thereof. The raw materials comprise carbon nitride, titanium carbonitride, molybdenum, nickel and cobalt, carbon nitride as the matrix phase, titanium carbonitride as the reinforcing phase are added to the carbon nitride based composite ceramic materials, with molybdenum, nickel and cobalt as a suitable sintering aid, dense composite tool material is obtained with vacuum hot press sintering method. The prepared carbon nitride based composite ceramic tool materials boast the advantages of low cost, high hardness, high bending strength and high fracture toughness, which is an important way to promote the innovation, development and popularization of carbon nitride materials.