Abstract: An airborne detection device and an operational method for cracks in concrete infrastructure structures include a multi-rotor UAV equipped with an ultrasonic mechanism for collecting concrete crack depth information and an imaging system for marking crack locations, capturing crack images, and extracting crack morphology information from these images. By integrating crack depth information with crack morphology data, the system generates a three-dimensional structure of the crack. The airborne detection device and method are suitable for the rapid inspection of large-scale concrete infrastructure (such as bridges, dams, buildings, etc.) in outdoor environments. By combining image recognition technology with ultrasonic techniques, it enables three-dimensional visualization of concrete cracks, providing reliable support for subsequent crack treatment decision-making.

Abstract: A reagent disc control device uses a combined rotary wheel to control an inner rod and an outer rod in a locking mechanism to move. By improving the structure of the combined rotary wheel, the locking mechanism can lock and release a reagent disc more stably and smoothly. Even if the rotary wheel is in direct contact with the locking mechanism, the locking mechanism will not shake. The locking mechanism is allowed to return to the initial state when it is not working, and to enter the working state when it needs to work. Springs in the locking mechanism do not need to be in a compressed state for a long time, and can be reused many times, thereby prolonging the service life and lowering the cost.

Abstract: The present invention relates to a silk fibroin/hydroxyapatite composite material, and a preparation method therefor and an application thereof. A uniform mixture of hydroxyapatite nanoparticles, silk fibroin, and hexafluoroisopropanol is maintained at a temperature range from 50° C. to 60° C. for at least 1 hour to obtain a silk fibroin/hydroxyapatite solution; the silk fibroin/hydroxyapatite solution is poured into a long cylindrical mold, two ends of the long cylindrical mold being respectively an end A and an end B; at room temperature, the end A is opened and the end B is closed, and the mold is vertically immersed in methanol with the opening facing up and let stand for at least 2 days; the mold is turned upside down, the end A is closed and the end B is opened, and the mold is vertically immersed in the methanol with the opening facing up and let stand for at least 2 days; the mold is removed, and ventilation and drying are performed to obtain a silk fibroin/hydroxyapatite composite material.

Abstract: A COMBO ONU optical module circuit is provided, including a MCU control circuit, a XGSPON ONU circuit, and a GPON ONU circuit. The MCU control circuit includes three control units. The first control unit is configured to determine a transmission channel according to a signal level. The second control unit is configured to switch between a TX_SD_10G signal and a TX_SD_1G signal. The third control unit is configured to supply power to the GPONG ONU circuit using PWR_1G control or the XGSPONG ONU circuit using PWR_10G control. The first control unit is further configured to control the XGSPON ONU circuit and the GPON ONU circuit in an I2C communication mode. Under control of the first control unit, the XGSPON ONU circuit is configured to receive and emit a 10G optical signal, and the GPON ONU circuit is configured to receive and emit a 2.5G optical signal.

Abstract: Provided are a synchronization mechanism and a folding hinge. In the synchronization mechanism, a base includes a spindle seat and a stop rack, and one first rotation portion is provided on each of two sides of the spindle seat along the width direction; the stop rack is detachably connected to the spindle seat, and a second rotation portion is provided on each of two sides of the stop rack along the width direction; two swing arms are rotatably disposed on two first rotation portions respectively; at least two slide rail arms are synchronously and rotatably disposed on two second rotation portions respectively, and each slide rail arm is provided with a slide groove; one end of a connecting rod shaft is connected to a respective swing arm while the other end of the connecting rod shaft is in a sliding fit with the slide groove.

Abstract: Provided is an air-conditioning indoor unit. The air-conditioning indoor unit includes a plurality of centrifugal wind wheels, a motor drivingly connected to the plurality of centrifugal wind wheels, an electric control box disposed in an axial direction of the plurality of centrifugal wind wheels, and an evaporator disposed in a radial direction of the plurality of centrifugal wind wheels and obliquely disposed relative to a height direction of the air-conditioning indoor unit. By providing the plurality of centrifugal wind wheels and driving the plurality of centrifugal wind wheels by a same motor, when a size of the air-conditioning indoor unit is large, a constant air volume may be outputted. The electric control box is located in the axial direction of the centrifugal wind wheel and far away from the evaporator, to prevent the electric control box from being splashed by condensed water.

Abstract: An electric control box is provided. The electric control box includes a box body, a circuit board, and a heat sink. The box body has a chamber, and an air inlet and an air outlet that are in communication with the chamber. The chamber has an air duct, and the air inlet and the air outlet are in communication with each other via the air duct. The box body is configured to allow air to be introduced into the air duct from the air inlet and to flow out of the air outlet. The circuit board is disposed in the chamber. The heat sink is disposed at the circuit board and located in the air duct.

Abstract: A motor mounting structure includes a motor, a first support member, and a second support member. The first support member and the second support member are both disposed at the motor and configured to be fixed. The first support member and the second support member are different from each other.

Abstract: A data access method includes a target storage node that determines at least one data access policy input or selected by a user on a management platform. The target storage node receives a first write data stream from a request client, where the first write data stream indicates a first tape, first data to be written into the first tape, and first tape space required by the first data, the first tape space belongs to a same data partition. The target storage node writes the first data into the first tape according to the at least one data access policy using a first tape drive in at least one tape drive.

Abstract: Provided is a coupler, an air-conditioner indoor unit, and an air conditioner. The coupler includes a sleeve, a spacing portion, a first inner core, and a second inner core. The sleeve is provided with a chamber. The spacing portion is configured to be elastically deformable and provided in the sleeve to divide the chamber into a first accommodation cavity and a second accommodation cavity. The spacing portion has a first groove opened towards the first accommodation cavity and a second groove opened towards the second accommodation cavity, and the first groove and the second groove at least partially overlap in a circumferential direction of the sleeve. The first inner core is inserted into the first accommodation cavity and embedded in the first groove, and adapted to be connected to a driving shaft. The second inner core is inserted into the second accommodation cavity and embedded in the second groove.

Abstract: Disclosed are a method for improving a surface quality of an alloy micro-area via a supersaturated film and use thereof. The method includes: adding nickel chloride to a sodium chloride-ethylene glycol electrolyte until the electrolyte is saturated, and conducting electrochemical machining.

Abstract: A temperature-pressure sensor includes a shell, a pressure sensitive component provided in the shell and a temperature sensitive component provided in the lower cavity. The shell is provided with a fluid inlet. The pressure sensitive component includes a ceramic plate laterally extended. The temperature sensitive component includes a temperature sensor, and two connection ends of the temperature sensor are respectively electrically connected to the circuit board through an elastic connection body, a conductive pin and a conductor. The conductive pin is respectively correspondingly penetrated through two via holes opened on the ceramic plate, and a gap between the conductive pin and the corresponding via hole is sealed by a seal body made of glass material; and the fluid inlet is communicated with the lower cavity.

Abstract: A loudspeaker mounting structure includes a case, a first cover, a second cover and a limiting module. The case is recessed inwardly with a groove. The first cover and the second cover are disposed on the upper surface and the lower surface of the case. The case, the first cover and the second cover form an accommodation cavity where a loudspeaker is mounted. The limiting module is disposed in the groove and includes a stud and a limiting component rotatably connected to the stud.

Abstract: A method for cyclic biochemical conversion of carbon dioxide and hot gas cogeneration in depleted oil and gas reservoirs includes: S1: selecting a target depleted oil and gas reservoir; S2: adjusting a temperature of the target depleted oil and gas reservoir to 30° C. to 70° C. and detecting whether formation water of the target depleted oil and gas reservoir contains methanogenic archaea, in which if no methanogenic archaeon is contained, then methanogenic archaea is injected and step S3 is proceeded, and if methanogenic archaea are contained, then step S3 is proceeded directly; S3: injecting a mixture of carbon dioxide and hydrogen into the target depleted oil and gas reservoir through a gas injection well; and S4: shutting down the gas injection well to wait for the methanogenic archaea to convert carbon dioxide and hydrogen into methane and exploiting the methane and heat energy in the target depleted oil and gas reservoir.

Abstract: The present disclosure discloses a high-whiteness polyimide microfiber and a preparation method thereof and use. The polyimide fiber includes polyimide obtained from the reaction of wholly alicyclic dianhydride HTDA and an aromatic diamine monomer containing methyl or trifluoromethyl by chemical imidization. In the present disclosure, the polyimide microfiber has both excellent heat-resistant stability and spinning film-forming property, and the fabric has ultra-high whiteness. The microfiber fabric prepared from the polyimide fiber may be used as a component with high-temperature resistant and high-whiteness in personal protective equipment such as mask and protective clothing, and also may be used as an electronic component in the high-tech field such as aerospace, optoelectronic, microelectronic and automobile.

Abstract: Disclosed are a heat exchanger fin, a heat exchanger, an indoor unit and an air conditioner. The heat exchanger fin includes a fin body, and the fin body includes an air outlet contour line arranged on one side and an air inlet contour line arranged on the other side; refrigerant pipe mounting holes are provided in the fin body; and on a straight line where the curvature radius of the air outlet contour line of the fin body is located, or on a straight line where the curvature radius of the air inlet contour line of the fin body is located, the distance between the air inlet contour line and the air outlet contour line of the fin body is gradually reduced from the middle to two ends of the heat exchanger fin.

Abstract: A dielectric coated plasmonic photoemitter is provided. An aspect of the present photonic apparatus includes a conductive photoemitter including a dielectric material coating or layered on a metallic core. The dielectric material being configured to enhance a local optical field strength and current density of the photoemitter as compared to a bare photoemitter without the dielectric layer. The dielectric layered photoemitter being tunable to transmit photoemissions from corners thereof with different photonic characteristics depending on a laser wavelength pulse received.