Abstract: A circuit for controlling a DC voltage source current includes a low-voltage DC bus capacitor, a first set of power electronics half-bridge units, a first set of branch circuit inductors, and a first set of DC switches. All of the first set of power electronics half-bridge units are connected in parallel between a positive pole and a negative pole of a low-voltage DC bus and are also connected in parallel with the low-voltage DC bus capacitor, an output neutral point of each power electronics half-bridge unit is connected in series with one of the first set of branch circuit inductors and one of the first set of DC switches to form one of a first set of current-sharing branch circuits, and each power electronics half-bridge unit and the corresponding current-sharing branch circuit are used to be connected with a DC voltage source to form a DC voltage source branch circuit.

Abstract: Embodiments of the present disclosure relate to a method, system and computer program product for providing system services. In some embodiments, a method is disclosed. According to the method, from a user program in a user address space, a request for a system service is received via a program call instruction of a set of program call instructions in an application interface code library. Based on the program call instruction, a target authorized address space of a plurality of authorized address spaces and a target system service routine for providing the system service in the target authorized address space is determined. A result of running the target system service routine in the target authorized address space is returned to the user program as a response to the request.

Abstract: The present invention discloses a positive pole piece, an electrochemical device including the positive pole piece, and an electronic device, and falls within the technical field of batteries. The positive pole piece includes a positive current collector and a positive active material layer provided on at least one surface of the positive current collector. The positive active material layer includes a ternary positive active material. The positive pole piece satisfies the following relationship: 1.2?D/(R/5+P/2)?3.5. D is a particle size change rate of Dv50 before and after the positive active material is held for 30 seconds at a pressure of 35 KN, and Dv50 is a particle size corresponding to 50% of a volume cumulative distribution percentage of the positive active material. R is a roughness of the positive pole piece, and P is a porosity of the positive pole piece.

Abstract: This application discloses a flexible printed circuit board and an electronic device. The flexible printed circuit board includes a body part, a coaxial cable, and a terminal disposed in the body part. The coaxial cable is disposed in the body part, and at least one end of the coaxial cable is electrically connected to outside by using the terminal.

Abstract: Embodiments of the disclosure provides a method, an apparatus, an electronic device and a storage medium for object processing. The method includes: in response to a deletion triggering operation, obtaining a target object to be deleted; determining object attribute data and a data association relationship corresponding to the target object, where the data association relationship is a reference relationship between the target object and a superior object containing the target object; obtaining serialized object data by serializing the object attribute data, and storing the serialized object data; and dissolving the data association relationship, and deleting the target object.

Abstract: Embodiments of the present disclosure provide a method, an apparatus, an electronic device, and a storage medium for data processing. The method comprises: in response to a copy trigger operation, obtaining an object to be copied, and determining a target component corresponding to the object to be copied; for each of the target component, obtaining a component object and an engine object of the target component, and determining target storage data corresponding to the target component based on the component object and the engine object, wherein the target storage data comprises a component object type field, an engine object type field, component object serialized data, and engine object serialized data; and storing the target storage data corresponding to the target component into a clipboard.

Abstract: This description relates to a substance causing a mutation at position 727 in an amino acid residue of the pAPN protein in any of the following: 1) constructing a cell line with site-directed modification of the pAPN gene for non-disease diagnostic and therapeutic purposes; 2) preparing a cell with resistance to the porcine transmissible gastroenteritis virus; and so on. A system for site-directed modification of the pAPN gene may effectively cleave two target sites of the pAPN gene, thereby achieving the precise mutation at position 727 in an amino acid of pAPN. Based on the precise modification of the pAPN gene while capable of avoiding disruption or alteration of the normal expression of other amino acids in the pAPN, the physiological activity function of pAPN protein on the basis of resisting TGEV infection is retained.

Abstract: The presently disclosed subject matter relates to devices, systems, and methods for fabricating a solid polymer electrolyte electrode assembly are provided. One or more electrode for a solid polymer electrolyte electrode assembly includes a porous substrate configured as a liquid/gas diffusion layer and an ionomer-free catalyst coated on the substrate.

Abstract: Provided is a fixing member used in a support structure (100) for a bed. The support structure includes a lower frame (10), an upper frame (20), a raising/lowering mechanism (30) configured to raise and lower the upper frame with respect to the lower frame and including a support shaft (312) extending in a width direction of the bed, and a supported member (221, 222) fixed to the upper frame and supported by the support shaft. The support shaft moves in a longitudinal direction of the bed while supporting the supported member when the upper frame is raised and lowered. The fixing member includes a plurality of fixing tools (S11 to S14) configured to fix the supported member to the upper frame. Each of the plurality of fixing tools includes a flexure element (SB) fixed to the upper frame at one end and fixed to the supported member at the other end, and a strain gauge (SG) attached to the flexure element.

Abstract: The present invention provides a pAPN mutant and a composition for site-directed modification of pAPN gene and application thereof, involving the field of gene editing technology. The mutated pAPN mutant with an alanine at position 734 can maintain its normal expression, while reducing the ability of a host expressing the pAPN mutant to specifically bind to TGEV, which has important scientific and practical significance in pig disease resistance breeding.

Abstract: Provided is a fixing member used in a support structure (100) for a bed. The support structure includes a lower frame (10), an upper frame (20), a raising/lowering mechanism (30) configured to raise and lower the upper frame with respect to the lower frame and including a support shaft (312) extending in a width direction of the bed, and a supported member (221, 222) fixed to the upper frame and supported by the support shaft. The support shaft moves in a longitudinal direction of the bed while supporting the supported member when the upper frame is raised and lowered. The fixing member includes a plurality of fixing tools (S11 to S14) configured to fix the supported member to the upper frame. Each of the plurality of fixing tools includes a flexure element (SB) fixed to the upper frame at one end and fixed to the supported member at the other end, and a strain gauge (SG) attached to the flexure element.

Abstract: A kit for breeding a pig breed with resistance to the porcine transmissible gastroenteritis virus infection and application thereof. The systems includes a genetically edited protein, pAPN-sgRNA-1, pAPN-sgRNA-2, and a donor DNA. Effectively enzymatic cleavage can be made in two target sites of a pAPN gene by the gene editing protein. By replacing the fragment to be site-directed modified located between two target sites with donor DNA, a codon encoding tryptophan at position 737 in pAPN protein can be mutated to a codon encoding alanine, thereby achieving precise mutation of tryptophan to alanine at position 737 in a pAPN protein. The systems can avoid disruption or alteration of the normal expression of other amino acids in pAPN protein, therefore, the present invention maximally retains the physiological activity function of pAPN protein on the basis of resisting TGEV infection.

Abstract: A screwing machine includes a motor, an output shaft, a twist portion, a plate portion, a strain gauge, an amplification circuit. The output shaft is driven by the motor. To the output shaft, a bit is attachable. The twist portion is hollow. To the twist portion, torque applied to the output shaft is transmitted through a transmission element. The output shaft is configured to be indirectly twisted by the torque applied to the output shaft. The plate portion is integrally formed with the twist portion. The strain gauge is disposed on the twist portion. The amplification circuit is disposed on the plate portion. To the amplification circuit, a signal from the strain gauge is input.

Abstract: An atomizer may include a housing and an atomizing assembly. The housing may include a nozzle and a liquid storage pipe. The nozzle may be located at an end of the liquid storage pipe and integrated with the liquid storage pipe. At least a portion of an outer surface of the nozzle away from the liquid storage pipe may include a matte surface having a first rugosity. At least a portion of an outer surface of the housing may be a polished surface through which aerosol-generating substrate stored in the liquid storage pipe can be observed. The atomizing assembly may be configured to heat and atomize the aerosol-generating substrate to generate smoke.

Abstract: An over-energy protection circuit, a residual current device, an electronic device, and a power distribution box. The protection circuit has relatively high operating reliability, and includes: a first over-energy absorption circuit, a second over-energy absorption circuit, and a residual current determining circuit. The first over-energy absorption circuit receives a first electrical signal output from a current transformer; and when a voltage value of the first electrical signal is greater than or equal to a first preset threshold, performs step-down processing on the first electrical signal to obtain a second electrical signal, and outputs the second electrical signal to the second over-energy absorption circuit; or when a voltage value of the first electrical signal is less than a first preset threshold, outputs the first electrical signal to the second over-energy absorption circuit.

Abstract: The present disclosure may provide an atomizer and an electronic atomization device. The atomizer may include a shell, a heating assembly, a lid, a base, and a first sealing component. The shell defines a liquid cavity and a smoke outlet. The heating assembly may heat and atomize the liquid into a smoke. The lid and the base may be provided to fix the heating assembly therebetween. The lid defines a liquid inlet communicating with the liquid cavity, and the liquid may flow through to reach the heating assembly. The atomizer may define an air entering hole, such that external air may enter the device through the hole to drive smoke to flow. The first sealing component may be engaged between the lid and the heating assembly, contacting both at the same time and defining air guiding channels to guide the air to flow into the liquid cavity.

Abstract: An atomizer may include a housing and an atomizing assembly. The housing may include a nozzle and a liquid storage pipe. The nozzle may be located at an end of the liquid storage pipe and integrated with the liquid storage pipe. At least a portion of an outer surface of the nozzle away from the liquid storage pipe may include a matte surface having a first rugosity. At least a portion of an outer surface of the housing may be a polished surface through which aerosol-generating substrate stored in the liquid storage pipe can be observed. The atomizing assembly may be configured to heat and atomize the aerosol-generating substrate to generate smoke.

Abstract: The present disclosure may provide an atomizer and an electronic atomization device. The atomizer may include a shell, a heating assembly, a lid, a base, and a first sealing component. The shell defines a liquid cavity and a smoke outlet. The heating assembly may heat and atomize the liquid into a smoke. The lid and the base may be provided to fix the heating assembly therebetween. The lid defines a liquid inlet communicating with the liquid cavity, and the liquid may flow through to reach the heating assembly. The atomizer may define an air entering hole, such that external air may enter the device through the hole to drive smoke to flow. The first sealing component may be engaged between the lid and the heating assembly, contacting both at the same time and defining air guiding channels to guide the air to flow into the liquid cavity.

Abstract: The present invention provides a polysubstituted nitrogen-containing heterocyclic derivative, a preparation method, and use thereof. In the present invention, the novel structure of the natural nitrogen-containing heterocyclic molecule is designed to obtain the polysubstituted nitrogen-containing heterocyclic derivative. The polysubstituted nitrogen-containing heterocyclic derivatives have obvious bactericidal activity, and some compounds have significant bactericidal activity against diseases such as E. carotovora, E. coli, and R. solanacearum, which can be widely applied in the comprehensive prevention and control of agricultural and forestry bacterial diseases. The bactericide obtained by mixing the polysubstituted nitrogen-containing heterocyclic derivative of the present invention with various adjuvants also have good bactericidal effects on E. coli, E. carotovora, R. solanacearum, etc.

Abstract: A negative electrode sheet and a battery applying the same are provided. The negative electrode sheet includes a current collector and a negative electrode active coating disposed on two opposite surfaces of the current collector. The negative electrode active coating contains a negative electrode active material, and the negative electrode active material includes graphite. The negative electrode sheet satisfies 0.0025??*?/PD?0.0065, where ? is a porosity of the negative electrode sheet, ? is a surface density of a single surface of the negative electrode sheet with a unit of g/cm2, and PD is a compacted density of the negative electrode sheet with a unit of g/cm3. The compacted density PD, the surface density ?, and the electrode sheet porosity ? of the negative electrode sheet form specific correlation relationships among one another.