Abstract: A folding hook structure comprising: a shell, fixed to the first object, and at least partially accommodates other parts of the folding hook structure; a rotating disk, fixed to the second object, and disposed in the shell to be rotatable around a rotation center in respect to the shell, with a folding hook groove disposed on a disk surface of the rotating disk, the folding hook groove including a circumferential section extending in a circumferential direction of the rotating disk with the rotation center as a center, and a radial section extending from the circumferential section along a radial direction of the rotating disk; a folding hook, disposed in the shell, and arranged movable between a locked position and a released position along the radial direction of the rotating disk, the folding hook being inserted in the folding hook groove.

Abstract: The present invention discloses a transaminase mutant and application thereof in preparation of sitagliptin intermediates, the transaminase mutant is obtained by substitution of tyrosine with proline at position 74, substitution of glutamic acid with aspartic acid at position 228, substitution of leucine with alanine at position 254 and substitution of methionine with threonine at position 290 of the amino acid sequence shown in SEQ ID NO: 2. The present invention uses wet cells or a purified transaminase as a biocatalyst and a sitagliptin precursor ketone or a prochiral carbonyl compound as a substrate to prepare a sitagliptin intermediate or a sitagliptin ester intermediate; the total yield of the method reaches about 82%, and e.e. value of the product reaches 99%.

Abstract: A battery heating system includes a switch assembly, and the switch assembly includes a first switch, a second switch, and a third switch. When the first switch is turned on and the second switch and the third switch are turned off, the first battery group and the second battery group are arranged in series connection and connected to a charging and discharging apparatus, for charging or discharging the first battery group and the second battery group after being connected in series. When the first switch is turned off and the second switch and the third switch are turned on, the first battery group and the second battery group are respectively connected to a battery heating apparatus to form a first loop and a second loop, and the first loop and the second loop are used for heating the first battery group and the second battery group.

Abstract: A dual-optical fusion laser rangefinder includes: a square housing, an optical core assembly, a protective lens, a touch control display module and a button control board. The optical core assembly and button control board are disposed in the square housing. The protective lens configured to transmit emitted and received lights is located at a front end of the square housing and corresponds to the optical core assembly. The touch control display module is disposed on the square housing and is connected to the button control board. The button control board is in control connection with the optical core assembly. The optical core assembly includes a phase laser ranging optical path unit and a pulse laser ranging optical path unit. The rangefinder can measure distances from 0.2 m to 5000 m and ensure that accuracy reaches the millimeter level within 200 m by integrating pulse laser ranging and phase laser ranging optics.

Abstract: A regulating method of a regulating circuit for a battery includes: determining whether to regulate the battery; and at least controlling, in response to determining to regulate the battery, multiple switching devices of a bridge arm set to form a current loop with a first current direction or a current loop with a second current direction between the battery and a power module, where the first current direction and the second current direction are opposite at the battery.

Abstract: Embodiments of this specification provide a user authentication information-based registration method and apparatus and a user authentication information-based query method and apparatus. The registration method includes: User equipment receives authentication information submitted by a first user in a process of registering with a server; obtains a public-private key pair by using a key generation algorithm and based on the random number r and a public parameter pp; performs a hash operation based on at least the password pwd, to obtain a user key value user_key; obtains a registration ciphertext Cregister by using an encryption algorithm and based on the public key pk and the user key value user_key; obtains, based on the private key sk and the registration ciphertext Cregister, a determining trapdoor tdregister that matches the registration ciphertext Cregister; and uploads the registration ciphertext Cregister and the determining trapdoor tdregister to the server.

Abstract: A self-heating control circuit includes a control module configured to obtain a cell temperature of each of two battery packs connected in parallel and send a trigger signal in response to the cell temperature being lower than a threshold. The two battery packs include a first battery pack and a second battery pack. The control circuit further includes a switch module disposed at a charging and discharging circuit of the first battery pack. A control terminal of the switch module is connected to the control module and is configured to cut off the charging and discharging circuit upon reception of the trigger signal. The control circuit also includes an excitation module configured to form a path with the two battery packs upon cut-off of the charging and discharging circuit, and generate an excitation current, so that the excitation current flows back and forth between the two battery packs.

Abstract: This application relates to communicating information between communication devices. A channel coding method is disclosed. A communication device obtains an input sequence of K bits. The communication device encodes the input sequence using a low density parity check (LDPC) matrix H, to obtain an encoded sequence. The LDPC matrix His determined according to a base matrix and a lifting factor Z. The base matrix includes m rows and n columns, m is greater than or equal to 5, and n is greater than or equal to 27. The lifting factor Z satisfies a relationship of 22*Z?K. According to the encoding method provided in the embodiments, information bit sequences of a plurality of lengths can be encoded for transmission between the communication devices.

Abstract: A low density parity check (LDPC) channel encoding method for use in a wireless communications system includes a communication device encoding an input bit sequence by using a LDPC matrix to obtain an encoded bit sequence for transmission. The LDPC matrix is obtained based on a lifting factor Z and a base matrix. The encoding method can be used in various communications systems including the fifth generation (5G) telecommunication systems, and can support various encoding requirements for information bit sequences with different code lengths.

Abstract: A device includes a parallel processor and a context switch scheduling circuit that is part of or separate from the parallel processor. The parallel processor is configured to execute requests from a plurality of virtual functions. The context switch scheduling circuit is configured to, responsive to a first virtual function of the plurality of virtual functions becoming idle during a first time slice at the parallel processor, perform a context switch for a second virtual function of the plurality of virtual functions before expiration of the first time slice, and assign a second time slice at the parallel processor to the second virtual function.

Abstract: A misting nozzle and a spray device are provided. The misting nozzle includes a spray barrel body, a liquid guiding element disposed in the spray barrel body and including first and second blocking portions, and a liquid valve disposed inside the spray barrel body and abutting against the liquid guiding element. Herein, the spray barrel body has one end provided with an opening and other end axially tapering to define a liquid outlet. An outer circumference surface of the first blocking portion is provided with an axially extending liquid guiding groove. A gap is defined between the outer circumference surface of the second blocking portion and the inner wall of the spray barrel body. The outer circumference surface of the liquid valve abuts against the inner wall of the spray barrel body. The liquid valve is a resilient element provided with an axially extending groove.

Abstract: A battery heating control method includes collecting a battery parameter of a battery module, in response to the battery parameter of the battery module meeting a preset heating condition, controlling a traction battery and a feed battery of the battery module to charge and discharge each other so that the battery module is heated through mutual charge and discharge of the traction battery and the feed battery, and controlling the traction battery of the battery module to power a motor of a vehicle.

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 device and method for heating a battery are provided. The device is provided on a first power-consuming device and includes: a first interface electrically coupled to a neutral point of a motor winding of the first power-consuming device; a second interface electrically coupled to a negative electrode of a battery of the first power-consuming device; and a control module coupled to a control system of the first power-consuming device and a control system of a second power-consuming device to coordinate and control the first power-consuming device and the second power-consuming device. The first interface is engageable with a third interface electrically coupled to a neutral point of a motor winding of the second power-consuming device. The second interface is engageable with a fourth interface electrically coupled to a negative electrode of a battery of the second power-consuming device. The control module is configured to perform a battery heating step.

Abstract: A misting nozzle and a spray device are provided. The misting nozzle comprises a spray barrel body, a liquid guiding element disposed in the spray barrel body and comprising first and second blocking portions, and a liquid valve disposed inside the spray barrel body and abutting against the liquid guiding element. Herein, the spray barrel body has one end provided with an opening and other end axially tapering to define a liquid outlet. An outer circumference surface of the first blocking portion is provided with an axially extending liquid guiding groove. A gap is defined between the outer circumference surface of the second blocking portion and the inner wall of the spray barrel body. The outer circumference surface of the liquid valve abuts against the inner wall of the spray barrel body. The liquid valve is a resilient element provided with an axially extending groove.

Abstract: Embodiments of golf club heads with energy storage characteristics are presented herein. In some embodiments, a golf club head comprises a body comprising a strikeface, a heel region, a toe region opposite the heel region, a sole, a crown, and an internal radius transition from the strikeface to at least one of the sole or the crown. In many embodiments, the internal radius transition region is not visible from an exterior of the golf club head and comprises a first tier, a second tier and a tier transition region between the first tier and the second tier.

Abstract: An electrical apparatus and a method for controlling heating thereof are disclosed. Before detecting a mobile electrical apparatus is in operation, the electrical apparatus may first receive input for a driving heating mode selected by a user. The driving heating mode corresponds to an enablement of a heating function is allowed or an enablement of a heating function is to be allowed. Thus, the battery heating function may be enabled or disabled according to the operating parameters of the battery and the motor based on the current driving heating mode. Further, a heating mode that matches the electrical apparatus may be selected based on usage habits and the current driving environment of the electrical apparatus for heating the battery. Further, the example methods avoid ineffective heating increased by manually controlling a battery self-healing function and the resulting high energy consumption in related technologies.

Abstract: A road milling cutting disc includes a support body in a disc shape, the support body includes a circumferential surface and a bottom surface which are arranged sequentially in that order from top to bottom, the bottom surface is configured to be arranged facing toward a road surface, the circumferential surface surrounds the bottom surface and is connected to the bottom surface along an edge of the bottom surface, the bottom surface is provided with multiple first cutting teeth around a rotational axis of the support body, and the circumferential surface is provided with multiple second cutting teeth around the rotational axis of the support body. Problems of cutting and flattening protruding rocks on the road surface are solved.