Abstract: The provided is a connector and a method for connecting a motor and an arm of multi-rotor aircraft. The connector includes a base, a locking disc component, and a guiding positioning component; one side of the base is connected to the arm, the locking disc component includes a forward locking disc structure and a reverse locking disc structure; the guiding positioning component includes a forward guiding positioning structure and a reverse guiding positioning structure; the forward guiding positioning structure and the reverse guiding positioning structure are respectively embedded in the forward locking disc structure and the reverse locking disc structure, and one end of the forward locking disc structure is connected to a forward propeller motor, another end of the forward locking disc structure is inserted into a forward end of the base through the forward guiding positioning structure and connected to the forward end of the base.

Abstract: A method for preparing concrete based on GGBS, silicon-aluminum compounds and CO2 waste gas includes: putting a certain quantity of GGBS, silicon-aluminum compounds and water into a ball milling tank; introducing CO2 waste gas into the tank, and stopping the introduction when gas pressure in the tank reaches a standard; and starting the ball milling tank, and repeating the gas charging and ball milling for multiple times until a median size reaches the standard and CO2 is completely reacted and adsorbed by the GGBS, and finally preparing concrete from a GGBS mixture meeting requirements. According to the method, by adding the silicon-aluminum compounds into the GGBS, and under a mechanical action of the ball milling machine, the GGBS is promoted to react with and adsorb CO2.

Abstract: A preparation method of a supplementary cementitious material based on electrostatic adsorption for high-efficiency CO2 sequestration is provided. The preparation method of the present disclosure includes the following steps: placing ultrafine carbide slag powder into an electrostatic field to make the ultrafine carbide slag powder have electrostatic charge, and obtaining ultrafine carbide slag powder with electrostatic charge; and uniformly mixing low-calcium fly ash and the ultrafine calcium carbide slag powder with electrostatic charge, followed by adding into a rotary packed bed; continuously introducing industrial waste gas containing CO2 and water vapor into the rotary packed bed; after a reaction, collecting a material and drying to obtain the supplementary cementitious material based on electrostatic adsorption for high-efficiency CO2 sequestration.

Abstract: Embodiments relate to a high-efficiency, refractive metalens capable of observing celestial bodies such as the moon. The metalens comprises a plurality of nanocylinders spatially arranged on a substrate, wherein the plurality of nanocylinders provide the metalens with an aperture having a diameter of 80 mm. The metalens is fabricated with deep-ultraviolet (DUV) projection stepper lithography, which is commonly used in the semiconductor industry. Embodiments further relate to a multi-level-compensated metalens (MLCM) that can achieve achromatic focusing and imaging across the entire visible light spectrum (e.g., 400 nm to 700 nm). The MLCM includes nanocylinders made of high-refractive-index silicon nitride and a plurality of stairs made of low-dispersion silicon nitride, separated by a spacer layer.

Abstract: The present invention provides a detection method for radiation-induced defects of an oxide layer in electronic devices. The detection method includes the following steps: selecting a semiconductor material to be prepared into a substrate; preparing a back electrode on an upper surface of the substrate; growing an oxide layer on the back electrode; etching one side of the oxide layer, and exposing an etched part out of the back electrode; preparing a front electrode on an upper surface of the oxide layer; forming a plurality of grooves in the front electrode, and distributing the plurality of grooves in a grid shape to prepare a test sample; and performing a radiation test on the test sample, and detecting radiation-induced defects. By using the detection method provided by the present invention, rapid identification and detection of electrons and holes are achieved.

Abstract: A terahertz signal-based image collection device, an image generation system and an image generation method are disclosed. The image collection device includes: a swinging reflection plate configured to reflect terahertz wave signals emitted from a sampling region including a target to be inspected; a lens component configured to focus the terahertz wave signals reflected by the swinging reflection plate; and a radiometer array including n rows of radiometers mounted on a focal plane of the lens component, where the n rows of radiometers are configured to sample the terahertz wave signals emitted from the same height of the target to be inspected and reflected by the swinging reflection plate at intervals, where n?2, so that the formed terahertz wave image has higher resolution and higher contrast.

Abstract: A stacking and palletizing device includes a cassette conveying mechanism, a product transporting and flipping mechanism, a product disc stacking mechanism, and a pallet feeding mechanism. The cassette conveying mechanism is provided thereon with an blank disc receiving station, a product loading station and a product disc stacking station; the product loading station is correspondingly provided with a cassette positioning mechanism; a cassette lifting and partitioning mechanism is disposed below the product disc stacking station; the product disc stacking mechanism includes a screw rod lifting mechanism, which is provided thereon with a palletizing and conveying mechanism; and a gantry truss transplanting mechanism is correspondingly disposed above the screw rod lifting mechanism.

Abstract: A heat dissipation module includes a plurality of heat dissipation units arranged along a longitudinal direction of the heat dissipation module. Each heat dissipation unit has a plurality of heat dissipation fins arranged at intervals along a transverse direction of the heat dissipation module. The heat dissipation fins of a first heat dissipation unit of a pair of adjacent heat dissipation units are each coupled with one of the heat dissipation fins of a second heat dissipation unit of the pair of adjacent heat dissipation units by a coupling structure. The heat dissipation fins of the first heat dissipation unit and the heat dissipation fins of the second heat dissipation unit are displaceable with respect to each other within a certain range.

Abstract: A radiator installation component includes a bottom plate defining a bottom opening, a top plate forming an elastic pressing member, a front end plate connected between front ends of the bottom plate and the top plate, and an inner cavity for inserting a radiator defined between the bottom plate, the top plate, and the front end plate. The radiator installation component is installed in a shielding shell of a connector and divides an internal space of the shielding shell into upper and lower accommodating chambers. The bottom opening formed in the bottom plate allows a bottom protrusion of the radiator to protrude into the lower accommodating chamber of the shielding shell. The elastic pressing member is adapted to press on a top surface of the radiator, so that the bottom protrusion of the radiator is in thermal contact with a mating connector inserted into the lower accommodating chamber.

Abstract: A connector module includes: 1) a first terminal module comprising a row of first terminals; 2) a second terminal module comprising a row of second terminals; and 3) a first holder, wherein the first terminal module and the second terminal module are respectively installed on the top and bottom of the first holder. The connector module further includes: 4) a third terminal module comprising a row of third terminals; 5) a fourth terminal module comprising a row of fourth terminals; and 6) a second holder, wherein the third and fourth terminal modules are respectively installed on the top and bottom of the second holder.

Abstract: An electric press with disc stacking, includes two sets of all-electric presses, a blank disc transporting and stacking all-in-one machine, and a control box. The blank disc transporting and stacking all-in-one machine includes a blank disc feeding mechanism, a cassette conveying mechanism, a product transporting and flipping mechanism, a product disc stacking mechanism, and a pallet feeding mechanism. During operation, the blank disc feeding mechanism feeds blank disc to a blank disc receiving station; the cassette conveying mechanism conveys the blank discs to a product loading station and install products in the blank discs; pallets are transported to the product disc stacking mechanism; the cassette conveying mechanism conveys the pallets with products loaded to a disc stacking station for a disc stacking operation, and after the disc stacking, conveys the products into the pallets for palletization.

Abstract: Disclosed are a laser transmission circuit, a laser transmission component and an electronic measuring instrument. The laser transmission circuit includes: an analog receiving unit, and a digital feedback path. The analog emission unit is configured to convert the accessed input analog signal into an analog laser signal, and emit the analog laser signal. The analog receiving unit is configured to convert the analog laser signal into an analog electrical signal as an output signal of the laser transmission circuit. An input end of the digital feedback path is connected to an output end of the analog receiving unit. An output end of the digital feedback path is connected to a feedback input end of the analog emission unit. The digital feedback path is configured to access the analog electrical signal output by the analog receiving unit, convert the analog electrical signal into a digital signal, and transmit the digital signal.

Abstract: A stacking and palletizing device includes a cassette conveying mechanism, a product transporting and flipping mechanism, a product disc stacking mechanism, and a pallet feeding mechanism. The cassette conveying mechanism is provided thereon with an blank disc receiving station, a product loading station and a product disc stacking station; the product loading station is correspondingly provided with a cassette positioning mechanism; a cassette lifting and partitioning mechanism is disposed below the product disc stacking station; the product disc stacking mechanism includes a screw rod lifting mechanism, which is provided thereon with a palletizing and conveying mechanism; and a gantry truss transplanting mechanism is correspondingly disposed above the screw rod lifting mechanism.

Abstract: A switchgear which includes a cable compartment enclosed by walls and a cover, and a cable connector arranged in the cable compartment. The cable connector is configured to electrically connect a cable to a cable bushing located in the cable compartment. cable connector includes a first portion to which the cable is connected and a metal plate arranged inside the cable compartment. The shortest distance between a main body and an outer surface of the first portion is in the range of 0 to 10 mm.

Abstract: The present invention provides a detection method for sensitive parts of ionization damage in a bipolar transistor, which includes the following steps: selecting an irradiation source, and carrying out irradiation test on the bipolar transistor to be tested; installing the irradiated bipolar transistor on a test bench of a deep level transient spectroscopy system, and setting test parameters; selecting at least two different bias voltages, and testing the bipolar transistor to obtain a deep level transient spectrum; determining whether a defect is an ionization defect according to a peak position of the defect signal in the deep level transient spectrum; determining the defect type as oxidation trapped charges or an interface state according to the level of the defect signal in the deep level transient spectrum; and determining the sensitive area of ionization damage in the bipolar transistor according to the determination result of the defect signal type.

Abstract: The disclosure provides a seat mounting structure and a train having same. The seat mounting structure includes a seat body (10), a side wall mounting member (20) and a suspension mounting rod (40), wherein a first end of the seat body is connected to a carriage side wall (30) by the side wall mounting member; one end of the suspension mounting rod is connected to a carriage roof, and the other end of the suspension mounting rod is connected to a second end of the seat body; wherein the first end of the seat body is one end, close to the carriage side wall, of the seat body, and the second end of the seat body is one end, away from the carriage side wall, of the seat body. The seat mounting structure provides an effective support for a suspension seat to improve a structural strength of the suspension seat.

Abstract: A switchgear which includes at least one three-position disconnector arranged in a gas-tight space of a frame. Each phase of the disconnector includes first, second, and third fixed contacts and a moving contact. The first fixed contact is directly connected to a main busbar, so that the conductive main circuit has shorter wiring, saving floor space, and conductor materials. An outer surface of the moving contact is provided with a slot extending in an axial direction to accommodate rolling elements, which guide the moving contact to move through the second fixed contact and prevent it from rotating. The moving contact is provided with grooves, which accommodate contact pieces to realize connection with the corresponding fixed contact. The moving contact of each disconnector is coupled to the same drive shaft so that it is connected to an external operating mechanism via only one sealing point on the frame.