Abstract: Provided are a salt and a crystal form of a pyrimidine compound, and preparation methods therefor. Specifically, provided are a salt and a crystal form of a compound I, including a crystal form of the salt, and preparation methods therefor.

Abstract: Provided is a sofa extension apparatus. The sofa extension apparatus includes a sofa frame, extension brackets, a first linkage rod, a second linkage rod and a linear drive assembly. Each extension bracket includes a sofa fixing member and a leg portion extension assembly, the sofa fixing member is connected to the sofa frame, the leg portion extension assembly is rotatably connected to a front end of the sofa fixing member. Two ends of the first linkage rod are fixedly connected to rear ends of two sofa fixing members respectively. Two ends of the second linkage rod are connected to two leg extension assemblies respectively. The linear drive assembly is configured to drive the first linkage rod and the second linkage rod to move relative to each other, so as to enable the two extension brackets to be extended or retracted.

Abstract: An example electronic device is provided, including a housing, a lens cover, and a lens assembly disposed in the housing. The lens assembly includes a plurality of lenses sequentially arranged from an object side to an image side along an optical axis. The lens assembly satisfies a conditional expression: 0.7<IH/(4*F #)<6, where IH is a total image height of the lens assembly, and F # is an F-number of the lens assembly. At least one lens that is in the lens assembly and that is close to the object side is configured to move along the optical axis. An equivalent focal length of the lens assembly is between 18 mm and 30 mm.

Abstract: A seat frame includes: a base including a transverse support rod and a longitudinal support rod; an elevation unit including a support, a first elevation rod, a second elevation rod, and a connecting piece; an extension unit including a base plate, a lifting unit, a foot adjustment unit, and a backrest adjustment unit, where the base plate being fixed to the connecting piece; and a power unit disposed on the base and separately connected to the elevation unit and the extension unit, where the power unit includes a drive unit, a connecting base, and a drive connecting rod, a first end of the drive unit is hinged to the base, and a second end of the drive unit is hinged to the connecting base.

Abstract: The present invention relates to the technical field of chip fixtures. Disclosed is a chip mounting fixture, comprising: a fixture body, wherein the fixture body is provided with chip slots which are uniformly distributed in an array and are used for accommodating chips, recessed wire slots are formed at the chip slots, and the wire slots extend to the outer sides of the chip slots. The present invention facilitates taking out a processed chip product, and the operation mode is convenient.

Abstract: The invention relates to an Oceanobacillus jeddahense strain HMF12, preservation number CGMCC No. 30478. The microbial inoculant contains 4×109 cfu/g to 7×109 cfu/g of Oceanobacillus jeddahense HMF12 spores. This strain can promote seed germination and plant growth under salt stress conditions and effectively prevent and control crop diseases, especially strawberry gray mold.

Abstract: Provided in the present invention are a salt of a benzothiazole compound as represented by formula I and a crystal form and the use thereof. The salt is selected from pamoate and palmitate. Further provided is the use of the salt of the compound of formula I and the crystal form thereof in the preparation of a drug for treating Parkinson's disease and restless leg syndrome.

Abstract: A data transmission method includes obtaining a first initial configuration parameter for a first network link for communicating with a user terminal, and determining a target configuration parameter for at least one target network link based at least on the first initial configuration parameter. The at least one target network link includes at least a second network link for communicating with the user terminal, and the second network link has a second initial configuration parameter different from the first initial configuration parameter. The method further includes performing configuration parameter reconfiguration for at least the second network link based on the target configuration parameter, to enable the user terminal to receive data sent by the network terminal based on aggregation of the first network link and the second network link.

Abstract: The present disclosure provides a content initialization method and apparatus, an electronic device and a storage medium, which relates to a field of computer technology, in particular to fields of deep learning and distributed computing. The content initialization method is applied to any one of a plurality of devices included in a distributed system. A specific implementation scheme of the content initialization method is: determining, according to a size information of a resource space for the distributed system and an identification information of the any one of the plurality of devices, a space information of a first sub-space for the any one of the plurality of devices in the resource space, wherein the space information includes a position information of the first sub-space for the resource space; and determining an initialization content for the first sub-space according to a random seed and the position information.

Abstract: The invention relates to an Oceanobacillus jeddahense strain HMF12, preservation number CGMCC No. 30478. The microbial inoculant contains 4×109 cfu/g to 7×109 cfu/g of Oceanobacillus jeddahense HMF12 spores. This strain can promote seed germination and plant growth under salt stress conditions and effectively prevent and control crop diseases, especially strawberry gray mold.

Abstract: A seat bracket includes a base mechanism, an electric motor, a transmission mechanism, and a scissor mechanism, where the transmission mechanism includes a transmission piece, a transmission rod, and a link, the transmission piece and the transmission rod are rotatably connected through the link, the transmission piece is rotatably connected to the scissor mechanism, the transmission rod is rotatably connected to the base mechanism, the electric motor is disposed in the base mechanism, an output end of the electric motor is connected to the transmission rod, and the electric motor is configured to drive the transmission rod to cause the transmission rod to drive the transmission piece and the link to rotate so that the scissor mechanism extends or retracts.

Abstract: A rain simulation system that replicates realistic raindrop characteristics for controlled testing is invented. The rain simulation system can be used as a stand-alone system with wind using a blower fan or in a wind tunnel, and without wind to create wind-driven and vertically falling rain droplets, respectively. In addition, methods to simulate rainfall for stationary and moving objects such as a road passenger vehicle are proposed. The rain simulation system is fully adjustable for a range of droplet size, impact velocity, rain intensity, rain coverage via the use of dripping nozzle devices and positioning of system components. The rain simulation system dispenses distinct droplets or continuous streams that can be broken down into droplets by wind. A rain nozzle device is coupled with a rain reservoir, and multiple nozzles are used to create a rain matrix, the full matrix is integrated with a rain rack and rainwater flow control strategy.

Abstract: Embodiments of the present application provide a method, an apparatus, a device, a medium, and a program for generating a cover image of a virtual object. The method includes receiving a generation instruction of a cover image of a virtual object; determining a position of a virtual camera for shooting the virtual object; shooting the virtual object according to the position of the virtual camera; and generating, according to an image of the virtual object shot by the virtual camera, a cover image corresponding to the virtual object. The cover image of the virtual object shot by this method is more complete and aesthetically pleasing.

Abstract: A heat spreader for transferring heat from an electronic heat source to a heat sink, a system for cooling an electronic heat source, and a method for manufacturing a heat spreader are provided. The heat spreader includes a set of separate channels which are coupled with each other by an upper coupler and a lower coupler such that a cooling fluid circulates in the set of separate channels via the upper coupler and the lower coupler in operation.

Abstract: A device for installing and removing a faucet retainer is disclosed, including a sleeve and a handle. The sleeve is provided with a demountable block at a lower end thereon for installing and removing the faucet retainer, the handle is disposed on the sleeve, and the handle is configured to drive the sleeve to rotate for installing and removing the faucet retainer. The device can efficiently complete installation and removal tasks of the faucet retainer, and such operation is simple and flexible, thereby greatly improving work efficiency.

Abstract: A device for preventing a faucet from leaking water and flowing back is disclosed, including an outer cover and an inner lining member, the inner lining member is provided in the outer cover. The outer cover is configured to cover a wall at a back end of the faucet to prevent water from flowing back, the inner lining member is provided with a plug hole for a water pipe to be plugged in, and the liner lining member is formed with a waterproof section on an outside of the plug hole to prevent water from flowing back into the wall. Through a combination design of the outer cover and the inner lining member and with assistance of an annular washer, thereby realizing effective shielding and waterproofing of the wall at the back end of the faucet.

Abstract: Provided are a chair frame and a chair. The chair frame supports a human waist and back by using a waist support assembly and supports human legs and feet by using a footstool assembly. Meanwhile, when the waist support assembly is unfolded, driven by a second support rod, a second end of a first support rod can swing toward the footstool assembly with a junction between a first end of the first support rod and the second support rod as a rotation center to increase an included angle between a waist support bracket and a seat cushion bracket, that is, increasing an unfolded angle of a backrest and achieving the zero gravity effect. The chair can improve the chair comfort by applying the preceding chair frame.

Abstract: Provided are an elderly chair support and an elderly chair.

Abstract: The present disclosure provides a variable frequency drive cooling device, a cooling method, and an air conditioning apparatus.