Abstract: A lightweight neck brace includes a head bracing member, a support member and a rotating mechanism rotatably couple the head bracing member and the support member between an adjustment state and a free state. The rotating mechanism enables the lightweight neck brace to be operable to switch between the adjustment state and the free state. In the adjustment state, the head bracing member can only be adjusted away from the support member, such that a height position of the supported head cannot be lowered. In the free state, the head bracing member can be adjusted away from the support member or close to the support member as desired.

Abstract: This application discloses a clock synchronization method and a related apparatus in a distributed system. The distributed system includes a plurality of nodes, and the plurality of nodes include a master node and a plurality of slave nodes. The master node obtains a plurality of local clock offsets, where each of the plurality of local clock offsets indicates a clock offset between two nodes in the distributed system. The master node determines a global clock offset of a target slave node relative to the master node based on the plurality of local clock offsets, and sends the global clock offset to the target slave node. The target slave node obtains a clock reference value of a local clock, and then performs clock synchronization based on the clock reference value and the global clock offset.

Abstract: Disclosed are a method, system and apparatus for data transmission, and a storage medium, which relate to the field of data transmission, and are used for transmitting data. Address mapping logic is provided in a storage array card, and a host maps a storage address space thereof to the storage array card by the address mapping logic of the storage array card; and after a data transmission instruction is sent to an NVMeSSD by a hard disk control mapping address in the storage array card, the NVMeSSD can directly perform data transmission on the basis of the data transmission instruction and a host storage mapping address in the storage array card, that is, the NVMeSSD can directly perform data transmission with the storage address space inside the host.

Abstract: A method and system for high-speed caching of data writing, a device and a storage medium. The method includes: in response to receiving a data-writing operating instruction emitted by a host, creating a controlling page table and filling sequentially a plurality of control blocks into the controlling page table; submitting an entry pointer of a first instance of the control blocks to a work-queue scheduling engine, to execute tasks corresponding to the plurality of control blocks alternately in the work-queue scheduling engine; sending in advance a completion response to the host and notifying a firmware to perform subsequent processing and falling-into-disk of data; and in response to ending of execution of a task corresponding to a last one instance of the control blocks, releasing a used resource of the controlling page table.

Abstract: A high-energy beam additive manufacturing forming device and forming method, comprising a magnetic field unit for assisting additive forming, and further comprising a forming base (6) for placing a material (12) to be processed, and a high-energy beam generation device which emits a high-energy beam, acts on the material (12) to be processed and forms a molten pool (15). The magnetic field unit comprises a first magnetic field generating device (7), and the first magnetic field generating device (7) comprises an induction coil (20) provided below the molten pool (15). The first magnetic field generating device (7) is detachably provided below a surface, used for containing the material (12) to be processed, of the forming base (6); second magnetic field generating devices (16) are provided above the forming base (6).

Abstract: A method and a device for determining a print position of a 3D model, a computer device, and a storage medium are provided. The method includes: obtaining an objective 3D model selected by a user and determining a projection of an objective area including the objective 3D model to a print plane; determining whether storage data exists; determining a first print position of the objective 3D model on the print plane in accordance with the projection when the storage data exists; and determining a second print position of the objective 3D model on the print plane in accordance with the projection and the storage data when the storage data does not exist. No intersection is existed between the second print position and the storage data.

Abstract: A model support point setting method includes: layering a model into a plurality of layers in accordance with a preset layer height, and obtaining a contour of each layer; locating a suspended layer in accordance with the contour of each layer; obtaining a suspension position of the suspended layer in accordance with a contour of a lower layer of the suspended layer and a contour of the suspended layer; determining a contour of an overhang position in accordance with the suspension position of the suspended layer, and determining a sharp corner area and a non-sharp corner area of the overhang position in accordance with the contour of the overhang position; and setting support points on the sharp corner area and the non-sharp corner area in accordance with corresponding preset support point densities. A model support point setting device, an electronic device, and a computer readable storage medium are also provided.

Abstract: A database system is provided, including a first global transaction manager (GTM), a first data node) DN, and a coordinator node (CN). The CN is configured to send a query to the first DN. The first DN is configured to, in response to the query, determine a target commit sequence number (CSN), determine a committed transaction on the first DN based on the target CSN, and determine a query result corresponding to the query based on the committed transaction. The target CSN is allocated by the first GTM. The target CSN is used to distinguish between the committed transaction and an active transaction on the first DN. The active transaction is a transaction that is being executed. In addition, a corresponding transaction management method is provided. The CSN is used to replace an active transaction linked list. This reduces network traffic and improves concurrency and scalability of the database system.

Abstract: Disclosed are a data transmission method, system and apparatus, and a device and a computer-readable storage medium. The method is applied to a data transmission system, and the system comprises a host device, devices for transmission and a transmission initiation device, wherein the host device can hold an initial configuration table, which contains device information of the devices for transmission, and sends the table to the transmission initiation device for selection and completion; the transmission initiation device fills in, according to its own demand, an initial configuration table of a target device with necessary information for establishing transmission, and returns an obtained complete configuration table to the host device; and the host device then configures the target device by using a complete information table, and returns the complete information table to the transmission initiation device after completing the configuration.

Abstract: A cache management method, apparatus and system, a device, and a nonvolatile readable storage medium. The method includes: receiving, by a storage system cache manager, a target operation request sent by a target user; processing the target operation request in a pipeline manner, so as to execute a processing operation corresponding to the target operation request on a cache line using the target operation request; and feeding back a processing result of the target operation request to the target user, and executing a cache maintenance operation corresponding to the processing result according to the processing result by means of a software cache manager.

Abstract: Disclosed are a method, system and apparatus for data transmission, and a storage medium, which relate to the field of data transmission, and are used for transmitting data. Address mapping logic is provided in a storage array card, and a host maps a storage address space thereof to the storage array card by the address mapping logic of the storage array card; and after a data transmission instruction is sent to an NVMeSSD by a hard disk control mapping address in the storage array card, the NVMeSSD can directly perform data transmission on the basis of the data transmission instruction and a host storage mapping address in the storage array card, that is, the NVMeSSD can directly perform data transmission with the storage address space inside the host.

Abstract: An auxiliary support apparatus includes a bearing member and a wear member, wherein the bearing member is used to support the user's head, the wear member includes a wear body extended from the bearing member downwardly while the bearing member is adjustably connected to the wear body.

Abstract: A ketoamide compound and a preparation method, a pharmaceutical composition, and a use thereof. Specifically, the ketoamide compound shown in formula (A), a racemate, an enantiomer, or a diastereoisomer thereof, or any mixture of same, or a pharmaceutically active metabolite thereof, or a pharmaceutically acceptable salt, solvate, or prodrug thereof. The ketoamide compound can effectively inhibit coronavirus or Ebola virus, and thereby implement the prevention or treatment of diseases related to coronavirus or diseases related to Ebola virus.

Abstract: The present disclosure relates to the field of directional solidification, and in particular, to an apparatus, method, and process for directional solidification by liquid metal spraying enhanced cooling (LMSC). The process has the following beneficial effects: the apparatus of the present disclosure can regulate a solidification structure of a casting, refine a dendrite spacing, and reduce or avoid metallurgical defects, and can be used to prepare high-quality large-sized columnar/single crystal blades or other castings.

Abstract: The disclosure provides novel method for removal of H2S from natural gas or other fluid in an oil and gas production facility by the use of a loop line method whereby the fluid passes through a looped pipeline containing H2S scavenger thereby increasing the contact time of the H2S scavenger with the gas and thus increasing the efficiency of the removal of H2S from the gas. The loop line can be added to a facility with an existing H2S scavenger direct injection line and can also be a standalone H2S scavenger method.

Abstract: The present application discloses a battery inspection device. The battery inspection device includes a power supply device, at least one charging port disposed on a surface of the power supply device, at least one display light bar disposed on the surface of the power supply device, and at least one first battery connection line, wherein the first battery connection line is electrically connected to the charging port.

Abstract: The present invention relates to the fields of medicinal chemistry and pharmaco therapeutics, and specifically to a method for preparing a compound of formula I and a chemically acceptable salt thereof.

Abstract: A method and system for high-speed caching of data writing, a device and a storage medium. The method includes: in response to receiving a data-writing operating instruction emitted by a host, creating a controlling page table and filling sequentially a plurality of control blocks into the controlling page table; submitting an entry pointer of a first instance of the control blocks to a work-queue scheduling engine, to execute tasks corresponding to the plurality of control blocks alternately in the work-queue scheduling engine; sending in advance a completion response to the host and notifying a firmware to perform subsequent processing and falling-into-disk of data; and in response to ending of execution of a task corresponding to a last one instance of the control blocks, releasing a used resource of the controlling page table.

Abstract: The present invention provides a pentacyclic triterpenoid glycoside compound, and a preparation method therefor and a use thereof. Specifically, the present invention provides a compound as shown in formula I. The definition of each group is described in the description. The compound can be used for preparing a medicament for treating metabolic diseases such as diabetes and viral diseases caused by influenza virus, coronavirus and the like.