Abstract: The present disclosure discloses a low-frequency vibration-isolating superstructure unit, a superstructure and a method of designing a superstructure, is capable of solving the problem that it is difficult to meet the requirements of miniaturization and lightening of vibration-isolating devices, and the problem of reduced structural rigidity and strength caused by vibration isolation.

Abstract: This application provides a method for training a portrait detection model, a portrait detection method, an electronic device, and a computer-readable storage medium. The portrait detection method is performed by utilizing a portrait detection model, and the portrait detection model is trained by acquiring at least one first image and at least one second image, acquiring a fused fisheye image from the first image and the second image, and training the portrait detection model by utilizing the fused fisheye image. The first image is a planar image including a portrait, and the second image is a fisheye image including a portrait. The fused fisheye image includes the portraits in the first image and the second image. The method is implemented by the electronic device and can improve the portrait detection accuracy using the portrait detection model.

Abstract: A solar cell and a photovoltaic module are provided. The solar cell includes an N-type substrate having a front surface and a rear surface, a passivation stack disposed on the front surface, and a tunneling oxide layer and a doped conductive layer disposed on the rear surface. The passivation stack includes an oxygen-containing dielectric layer including a metal oxide material, a first passivation layer including an oxygen-containing silicon nitride material, and a second passivation layer including a silicon oxynitride material. A thickness of the oxygen-containing dielectric layer is in a range of 1 nm to 15 nm in a direction perpendicular to the front surface, a thickness of the first passivation layer is in a range of 30 nm to 60 nm in the direction perpendicular to the front surface, and a thickness of the second passivation layer is in a range of 20 nm to 40 nm in the direction perpendicular to the front surface.

Abstract: Disclosed are a multi-directional broadband tuned mass damper and a design method thereof, since a first damping structure and a second damping structure are set on a rigid vibration damping frame, and the first damping structure is provided with a control main frequency, the second damping structure is provided with two control main frequencies, the control main frequency of the second damping structure is greater than that of the first damping structure; under the synergistic effect, the second damping structure mainly effectively broadens the control range for high frequencies, and a plurality of first damping structures control the control main frequency of a low frequency one-to-one, thereby controlling the full frequency, and the extension direction of the first damping structure is the same as that of the second damping structure on the rigid vibration damping frame, ensuring isotropic mass and stiffness distribution characteristics thereof; and furthermore, when using different control frequency range

Abstract: A solar cell, a manufacturing method therefor, and a photovoltaic module are provided. The solar cell includes a substrate having a front surface and a rear surface, a passivation stack disposed on the front surface, and a tunneling oxide layer and a doped conductive layer disposed on the rear surface. The passivation stack includes an oxygen-containing dielectric layer, a first passivation layer and a second passivation layer. The first passivation layer includes a first interface adjacent to the oxygen-containing dielectric layer and a second interface adjacent to the second passivation layer, the second passivation layer includes a third interface opposite to the second interface, a nitrogen content and a silicon content at the second interface are higher than those at the first interface and the third interface, respectively, and an oxygen content at the second interface is lower than that at the first interface and the third interface, respectively.

Abstract: A chip for visible-light communication (VLC), a preparation method, and an application of the chip includes a substrate, a buffer layer, an intrinsic GaN layer, a first GaN layer, an i-InxGa1-xN functional layer, a second GaN layer, an i-InyGa1-yN functional layer, a third GaN layer, and a top electrode that are stacked sequentially, where 0?x<1 and 0?y?1. Sidewalls of the i-InxGa1-xN functional layer, the second GaN layer, the i-InyGa1-yN functional layer, and the third GaN layer are each provided with a SiO2 isolation layer. A bottom electrode is arranged in an upper portion or on a surface of the first GaN layer, and the SiO2 isolation layer on the sidewall of the i-InxGa1-xN functional layer is located between the bottom electrode and the i-InxGa1-xN functional layer. Based on the structural design and growth process for the chip for VLC, dual-band detection by a high-bandwidth chip can be implemented.

Abstract: An anechoic chamber and a construction method thereof are provided, the anechoic chamber includes a top surface, being a polygon; trapezoid surfaces, corresponding to edges of top surface, upper edge lengths of trapezoid surface being equal to edge lengths of top surface, trapezoid surfaces being connected to edges of top surface through the upper edges, the trapezoid surfaces being sequentially connected along a circumferential direction of top surface, and being at angle to the top surface; rectangular surfaces, corresponding to the trapezoid surfaces, upper edge lengths of rectangular surface being equal to lower edge lengths of trapezoid surface, rectangular surfaces being connected to the trapezoid surfaces through the upper edges, the rectangular surfaces being sequentially connected along a circumferential direction of the lower edges of trapezoid surfaces, and being perpendicular to the top surface; and an absorbing material, disposed on the top surface, the trapezoid surfaces and the rectangular surf

Abstract: An anechoic chamber and a construction method thereof are provided, the anechoic chamber includes a top surface, being a polygon; trapezoid surfaces, corresponding to edges of top surface, upper edge lengths of trapezoid surface being equal to edge lengths of top surface, trapezoid surfaces being connected to edges of top surface through the upper edges, the trapezoid surfaces being sequentially connected along a circumferential direction of top surface, and being at angle to the top surface; rectangular surfaces, corresponding to the trapezoid surfaces, upper edge lengths of rectangular surface being equal to lower edge lengths of trapezoid surface, rectangular surfaces being connected to the trapezoid surfaces through the upper edges, the rectangular surfaces being sequentially connected along a circumferential direction of the lower edges of trapezoid surfaces, and being perpendicular to the top surface; and an absorbing material, disposed on the top surface, the trapezoid surfaces and the rectangular surf

Abstract: A loading/unloading system for a quay type full-automatic container terminal includes a plurality of shore cranes, an operation lane area between two rails of the shore cranes, an operation area from a rear side of a landside rail of the shore cranes to a yard, an automatic container yard area, an operation lane area of the yard, and facilities behind the yard. The shore cranes are disposed in parallel at a front edge of a container terminal to autonomously complete shipping and unshipping operations of containers, and autonomously complete loading/unloading processes of artificial intelligence transportation robots through information interaction with an artificial intelligence transportation robot system. The operation lane area between two rails of the shore cranes includes: a lambdoidal reverse operation area of inner container trucks, a ship lofting operation area, and a loading/unloading operation area of the inner container trucks, which are physically isolated by fences.