Abstract: The present disclosure provides an acoustic output device comprising a bone conduction acoustic assembly used to generate a bone conduction acoustic wave; an air conduction acoustic assembly used to generate an air conduction acoustic wave; and a housing used to accommodate at least a portion of elements of the bone conduction acoustic assembly and the air conduction acoustic assembly. The housing includes a first chamber used to accommodate at least a portion of the bone conduction acoustic assembly; and a second chamber. The housing is provided with a sound outlet communicated with the second chamber. The air conduction acoustic wave is transmitted to an outside of the acoustic output device via the sound outlet. A frequency response curve of the air conduction acoustic wave has at least one resonance peak. A peak resonance frequency of the at least one resonance peak is greater than or equal to 1 kHz.

Abstract: The present disclosure provides a 3D printing-based device for shield tunnel lining formation, which utilize a more rapid and efficient extrusion process. Solid printing materials are fed into a specially structured tunnel forming mechanism via a pneumatic conveying system. In conjunction with a lining cooling jacket and a shield machine's advancement control device, the 3D printing-based device enables continuous 3D printing of the tunnel lining.

Abstract: Provided are an electroluminescent material and a device thereof. The electroluminescent material is a metal complex having a ligand represented by Formula 1 and can be used as light-emitting materials in electroluminescent devices. These new metal complexes can effectively regulate and control the luminescence wavelength, reduce the drive voltage of electroluminescent devices, greatly improve the current efficiency, power efficiency and EQE of electroluminescent devices, prolong the device lifetime, and provide better device performance. Further provided are an electroluminescent device and a compound composition.

Abstract: A heating device is provided. The device includes a heat generating lamp and a reflector assembly. The reflector assembly includes an upper reflector, a lower reflector, a pair of side reflectors arranged on either side of the upper and lower reflectors, and a lamp reflector. A temperature sensor is also provided. A control system is responsive to the output of the temperature sensor for controlling at least one parameter of the heat generating lamp.

Abstract: A riding mower includes a seat for a user to sit on, a main frame configured to support the seat, a power output assembly configured to mow vegetation, a traveling assembly configured to enable the riding mower to travel, an operating assembly configured to be operated by the user, a control module configured to control the riding mower, and a power supply apparatus configured to supply power to the riding mower. At least a portion of the control module is disposed on the lower side of the seat, and the control module comprises a drive control board for controlling the power output assembly and the traveling assembly, a fuse, and a power supply management module.

Abstract: A hemostatic clip includes a traction device, a clamping device and a first limiting member. The traction device includes a traction mechanism and a separation mechanism. The clamping device includes a constricting sleeve and a clip head assembly. A proximal end portions of the clip head assembly is inserted in an inner bore of the traction mechanism in an interference-fit manner. The separation mechanism prevents a second locking member of the clip head assembly from being connected to a first locking member of the constricting sleeve, thereby allowing the traction mechanism to drive, under the action of an external force, the clip head assembly to move along an axis of the constricting sleeve. The clip head assembly can be separated from the traction mechanism simply by providing an external force that can overcome the interference fit between the two.

Abstract: The present disclosure relates to a method for constructing the initial structure of an athermal optical system, specifically relating to a method for constructing the initial structure of an athermal optical system based on particle swarm optimization algorithm, which is used to solve the shortcomings of the current athermal optical system designs where optical design software heavily relies on the initial structure of the athermal optical system, and the construction of the initial structure does not consider the selection of optical materials, resulting in extremely low efficiency of the athermal optical system designs. The method for constructing the initial structure of an athermal optical system based on particle swarm optimization algorithm provides a new design concept for the athermal optical system, which achieves a reasonable match between optical materials and mechanical materials in the initial structure stage and improves the efficiency of subsequent design optimization.

Abstract: Provided in the present invention are a polyurethane-polyurea aqueous dispersion, and a preparation method therefor and the use thereof. The polyurethane-polyurea aqueous dispersion comprises a unit derived from a component a, wherein the component a comprises at least one polyhydric alcohol with a functionality of 2 or more, and the component a comprises at least 40 wt % or more of a semi-crystalline polyester polyol obtained by reacting a dihydric alcohol with a component I, the component I comprising an aliphatic dicarboxylic acid and a component II at a molar ratio of (2.1-10):1, and the component II being an aromatic dicarboxylic acid and/or aromatic dicarboxylic acid anhydride. A soft and elastic product prepared on the basis of the polyurethane-polyurea aqueous dispersion provided in the present invention has the comprehensive properties of good elasticity, strength, water resistance, wearability, tactility, etc.

Abstract: Disclosed are organic electroluminescent material and device. The organic electroluminescent material is a metal complex with a structure of Formula 1. These novel metal complexes can be used in electroluminescent device, and show more excellent performance, for example, they can reduce the driving voltage and full width at half maximum, obtain more saturated light emission, improve the efficiency and the lifetime of the device, and finally, it can improve the comprehensive performance of the device significantly.

Abstract: Embodiments of the present disclosure provide a data query method, a device, a system, and a storage medium. In this embodiment of the present disclosure, a data schema of target data may be constructed via a query request; and the target data is assembled according to the constructed data schema. In this way, based on the query request and the data schema, a computing operation can be performed on the target data stored in the constructed data schema to obtain a query result, thereby implementing schema on read. This data query manner does not require data to be written according to a fixed data schema, which can improve data flexibility. In addition, schema on read can satisfy computation and analysis requirements and improve data computing capability of the database.

Abstract: An air conditioner includes a housing provided with an air inlet and an air outlet, a heat exchanger and a fan assembly disposed inside the housing. The fan assembly includes a mounting assembly, and the mounting assembly includes a first mounting member and a second mounting member. The first mounting member is detachably disposed on the second mounting member. The first mounting member includes at least one first volute portion and at least one first fixing portion. The second mounting member includes at least one second volute portion, at least one second fixing portion and a partition portion. The second mounting member is fixed to the top plate. The at least one second volute portion, the at least one second fixing portion and the partition portion are integrally formed.

Abstract: Embodiments of the disclosure provide an array substrate, a display panel and a display apparatus. The array substrate includes: a plurality of first metal wires extending in the first direction, a plurality of conductive portions in the display region; an orthographic projection of at least one conductive portion is between the orthographic projections of adjacent first metal wires on the base substrate; the second conductive layer includes: a plurality of first electrodes in the display region; a first metal sub-wire and a second metal sub-wire included in the first metal wire are on two sides adjacent to the conductive portion; the first metal sub-wire is electrically connected with the second portion; the first part is electrically connected with the first electrode through the conductive portion.

Abstract: The present disclosure discloses an earphone. The earphone includes a loudspeaker component and at least one blocking member, the at least one blocking member including a first blocking member, the first blocking member being provided on one side of the loudspeaker component, wherein, in a wearing state, at least a portion of the first blocking member extends in an extension direction from the loudspeaker component to an ear canal of a user. In the above manner, the earphone provided in the present disclosure can increase a volume heard by the user's ear, so that the user can hear the content with a smaller volume and also the sound leakage can be reduced, thereby improving the user's listening effect.

Abstract: The present application relates to a real-time defect detection method for metal deposition based on artificial intelligence, which includes: acquiring a deposition defect dataset and extracting key deposition features by using a backbone network; capturing high-level semantic features in the deposition features and performing multi-scale feature fusion by a high-efficiency hybrid encoder; adopting an Intersection over Union (IoU) aware query selection method to assign corresponding classification scores to deposition features with different IoU values during the training process for constraining model learning, and selecting more accurate deposition features in the decoding stage by optimizing object queries; mapping the optimized objects to classification confidence and bounding boxes, and accelerating training convergence through a denoising module in a decoder.

Abstract: The present embodiments relate to a modular system to sort and analyze melee sized gemstones in an automated manner. The system can use a rotating tabletop design to separate gemstones for individual analysis and sorting. For instance, a feeder subsystem can obtain gemstones, and a singulation subsystem can orient the gemstones for further processing. The gemstone can move between subsystems due to the rotation of the table. A set of metric subsystems disposed about the table can process aspects of the gemstone to derive metrics for the gemstone. Further, a sorting subsystem can sort the gemstone into a corresponding bin based on the derived metrics for the gemstone.

Abstract: Disclosed are a backlight module and a display apparatus. The backlight module includes: a backboard and a diffusion plate arranged opposite to each other, and a middle bezel arranged along an edge of the backboard and abutting against the diffusion plate; and a plurality of light-emitting devices on a side of the backboard facing the diffusion plate. The light-emitting device of the plurality of light-emitting devices located on an outermost side is a first light-emitting device, and in a first direction of the middle bezel pointing toward the first light-emitting device, the light-emitting device nearest the first light-emitting device is a second light-emitting device.

Abstract: A long-span corridor comprising two sets of floor cantilevered inclined trusses combined with suspension cable bearing is provided, including floor cantilevered inclined trusses, floor double-arch trusses, radial circumferential connecting structures, V-shaped support structures, corridor truss structures and suspension cable bearing structures; two trapezoidal tapering planar inclined trusses of each set of floor cantilevered inclined trusses are connected to each other through a combination of the floor double-arch trusses and through the radial circumferential connecting structures to form a single-set system; and the corridor truss structures are arranged between the two single-set systems.

Abstract: The present disclosure provides an impedance device and a system for simulating an impact of a head on a vibration of a vibration unit. The impedance device may include a mass part, an elastic part, and a fixing part. The mass part is connected to the fixing part through the elastic part. The fixing part is a hollow structure, the fixing part includes an opening. The elastic part is located at the opening and is connected to the fixing part. The elastic part forms a cavity with the fixing part. An elastic coefficient of the elastic part of a vibration direction in which the mass part vibrates relative to the fixing part in a range of 600 N/m~5000 N/m.