Abstract: A method of preparing PAN-based carbon fibers relates to the technical field of materials. The method includes: S1. acrylonitrile, a second monomer and an unsaturated UV-sensitive cross-linking agent are mixed, an initiator is then added and a reaction is performed to obtain a meltable PAN-based copolymer; S2. the meltable PAN-based copolymer and a flow modifier are mixed to obtain a mixture, the mixture is extruded and pelletized, and then melt spinning is performed to obtain nascent fibers, the nascent fibers are stretched and annealed to obtain a PAN-based carbon fiber precursor; S3. ultraviolet irradiation is performed on the PAN-based carbon fiber precursor; S4. the PAN-based carbon fiber precursor after ultraviolet irradiation is pre-oxidized and carbonized to obtain PAN-based carbon fibers.

Abstract: The present application discloses a double-sided SiP packaging structure and a manufacturing method thereof, wherein the double-sided SiP packaging structure comprises a substrate, a first packaging structure arranged on the substrate, and a second packaging structure arranged below the substrate; the second packaging structure comprises a chip, interposer and a molding material; a conductive structure array is arranged on an upper surface of the interposer; the interposer is arranged below the substrate through the conductive structure array; a space region among a lower surface of the substrate, the chip and the interposer is filled with the molding material; a conductive bonding pad array is arranged on the lower surface of the interposer; and a groove is formed in a part of region between the conductive bonding pad and an edge contour of the interposer.

Abstract: The present disclosure providing an LED lamp with a heat sink and with a power supply received in a housing, includes the housing, a body, the power supply received in the housing, and a first connecting member arranged between the housing and the body. The body includes the heat sink, and a plurality of first LED plates installed on the heat sink and electrically connected to the power supply; the first connecting member including an upper portion clamped with the housing, and a lower portion fixed with the heat sink. The present disclosure provides the first connecting member to separate the power supply from the heat sink and increase a distance between the power supply and the heat sink to reduce heat transferred from the first LED plates to the power supply; the first connecting member is clamped with the housing, which is convenient for assembling the LED lamp.

Abstract: Determining an active jacking force of a tunneling closely undercrossing existing station, includes: acquiring design parameters of stations, and geological parameters of a construction site; obtaining a stress solution expression of the active jacking force on the existing station to obtain a stress solution of any point in a semi-infinite space under the action of a vertical load, replacing the vertical load with a vertical load acting on the existing station, and obtain a vertical stress solution of the existing station; obtaining a relational expression between the deflection and the stress solution of the existing station; and substituting the stress solution expression of the active jacking force into the relational expression between the deflection and the stress solution of the existing station according to boundary conditions at both ends of a beam on elastic foundation to obtain the active jacking force that controls the deflection of the existing station.

Abstract: The present disclosure is directed to a metrology system having 3-dimensional sensors for thickness measurements of semiconductor elements, and methods for taking the thickness measurements. In an aspect, the 3-dimensional sensor may be a single or dual 3-dimensional profiler that may scan across the top and bottom surfaces of an element to obtain a thickness measurement. In another aspect, the method may be used to measure a gap between elements that have assembled together.

Abstract: The invention relates to the technical field of vehicle design, and aims to solve the problem that an existing vehicle body design method is likely to cause a high scrap rate of a stamped part constituting a vehicle body in a manufacturing process. To this end, the invention provides a method for improving the design of a vehicle-body stamped part, the method including: obtaining thinned portions with thinning rates exceeding a standard rate on a stamped part that has been formed; screening a first portion with a defect rate and/or a defect type not meeting a preset requirement from the thinned portions; and adjusting a shape, a size, and/or a material of a second portion that is the same as the first portion on an original design model of the stamped part to obtain a target design model.

Abstract: The present invention discloses an atomized liquid storage device, including a container used for storing atomized liquid, where the container is axially provided with a penetrating through hole, an inner wall of the through hole is provided with a liquid outlet hole communicating with an inner part of the container, the through hole is further internally provided with a sealing structure slidable up and down, and the sealing structure seals the liquid outlet hole and is set to allow air in the through hole to pass through. An atomizer is further disclosed, including the atomized liquid storage device and an atomization device. The atomized liquid storage device of the present invention has advantages of a simple structure and good sealing performance, and the atomizer of the present invention has advantages of being convenient and efficient in use and replacement of an atomized liquid storage device.

Abstract: The present application discloses a multi-function alcohol tester, including a housing, where the housing is internally provided with an alcohol test module, the alcohol test module includes a PCB mainboard, and the PCB mainboard is provided thereon with an alcohol measurement sensor communicating outside the housing; and the housing is further internally detachably connected with a function module, and the alcohol test module and the function module are powered by a battery disposed in the housing. The present application has advantages as follows: the multi-function alcohol tester has many functions, has a function module that can be detached or replaced, and is easy to carry.

Abstract: Disclosed is an electronic atomization device, which includes a suction nozzle, an oil cup assembly, an atomization core assembly and an electrode assembly. The atomization core assembly includes a heater support with a first stepped structure, an atomization core body supported by the heater support, a sealing washer sleeved on the atomization core body and closely contacting with the first stepped structure, an electrode connecting part connected with an end of the heater support via an insulating ring and an air hole connecting part disposed in the atomization core body. The oil cup assembly includes an oil cup body having an airway tube for connecting with the air hole connecting part, a first connecting element removably connected with the suction nozzle and a second connecting element having a second stepped structure formed therein for fitting the sealing washer. According to the present invention, its atomization core is easy to be changed.

Abstract: The present invention discloses an anti-seepage atomizer, including an oil cup and a hollow atomizing core, where a hollow tube is disposed at a center of the oil cup in a manner of extending inward and downward from a top, an upper end of the atomizing core is movably inserted into the hollow tube in a sealed manner from a place below the hollow tube, a lower end of the atomizing core is movably disposed inside an atomizing core base in a sleeved manner, an inner wall of the oil cup, the hollow tube, an upper surface of the upper end of the atomizing core, and an upper surface of an atomizing core base form a sealed oil storage chamber, the middle of the atomizing core is provided with at least one oil hole in communication with an atomizing structure inside the atomizing core.

Abstract: The present application discloses a multi-function alcohol tester, including a housing, where the housing is internally provided with an alcohol test module, the alcohol test module includes a PCB mainboard, and the PCB mainboard is provided thereon with an alcohol measurement sensor communicating outside the housing; and the housing is further internally detachably connected with a function module, and the alcohol test module and the function module are powered by a battery disposed in the housing. The present application has advantages as follows: the multi-function alcohol tester has many functions, has a function module that can be detached or replaced, and is easy to carry.

Abstract: A thermal insulation suction nozzle is disclosed, including a hollow inner tube, where an outer wall of the inner tube extends outwardly in a radial direction to form at least two partition plates, an adjusting ring is further sleeved on the inner tube in a rotatable manner, at least two partition spaces between the inner tube and the adjusting ring are partitioned by the partition plates, air inlet holes are disposed in a lower part of the adjusting ring, the number of the air inlet holes being the same as the number of the partition plates, and the adjusting ring is rotated outside the inner tube so as to enable the air inlet holes to communicate with or close the partition spaces. The thermal insulation suction nozzle has the advantages of preventing harms to the oral cavity caused by vapor and improving the degree of comfort for inhalation.

Abstract: Disclosed is a power supply device for electronic atomizer, which includes a housing having a battery compartment formed therein, at least a battery installed in the battery compartment and a control circuit having an input side electrically connected with the battery and an output side electrically connected with an output electrode terminal. The control circuit includes a microcontroller unit, a mode selection module connected with the microcontroller unit for selecting working mode of the electronic atomizer, a regulation module connected with the microcontroller unit for regulating working parameter of the electronic atomizer and a start button connected with the microcontroller unit for controlling whether the electronic atomizer starts up. The mode selection module is a multi-position switch and the microcontroller unit is able to being triggered to start corresponding working modes by switching the multi-position switch to be different positions.

Abstract: The present invention discloses an atomized liquid storage device, including a container used for storing atomized liquid, where the container is axially provided with a penetrating through hole, an inner wall of the through hole is provided with a liquid outlet hole communicating with an inner part of the container, the through hole is further internally provided with a sealing structure slidable up and down, and the sealing structure seals the liquid outlet hole and is set to allow air in the through hole to pass through. An atomizer is further disclosed, including the atomized liquid storage device and an atomization device. The atomized liquid storage device of the present invention has advantages of a simple structure and good sealing performance, and the atomizer of the present invention has advantages of being convenient and efficient in use and replacement of an atomized liquid storage device.

Abstract: Disclosed are an authentication device and an authentication method for electronic atomization device based on mobile terminal. The device includes a Bluetooth control module, an information transmission module, an information searching module, an information input module and a comparing and authenticating module. The authentication method includes steps of: building a Bluetooth connection between battery and mobile terminal; sending serial number of the battery to the mobile terminal after atomizer connects with the battery successfully; searching corresponding user identification information according to the serial number of the battery; receiving authentication information entered by user and carrying out an authentication by comparing the authentication information entered by user and the user identification information.

Abstract: Disclosed are a control device and a control method for electronic atomization device based on mobile terminal. The device includes a Bluetooth control module, a matching module and an authentication module. The control method includes steps of: building a Bluetooth connection between battery and mobile terminal; sending atomizer identification information stored in atomizer to the mobile terminal and then carrying out a match by comparing the atomizer identification information and original identification information; and searching corresponding user identification information according to serial number of the battery, receiving authentication information entered by user and then carrying out an authentication by comparing the authentication information entered by user and the user identification information.