6results about How to "High aspect ratio" patented technology

The utility model discloses a guide mechanism of a vibration test bench. The guide mechanism comprises an upper guide mechanism and a lower guide mechanism. The upper guide mechanism comprises a plurality of tension spring guide assemblies and a plate spring guide assembly, each tension spring guide assembly comprises a tension spring body, each plate spring guide assembly comprises a plate spring body, and the lower guide mechanism comprises a guide column. The vibration test bench further comprises a bench body, an inner drive and a moving coil, at least part of the moving coil is located in the bench body and can move in the vertical direction, the moving coil is connected with an upper cover plate of the bench body through plate spring guide assemblies and tension spring guide assemblies which are evenly distributed in the circumferential direction of the moving coil, and the vertically-arranged guide columns are inserted in the inner drive. According to the utility model, the movement direction of the moving coil can be limited, so that the vibration test bench has good lateral ratio, uniformity and frequency response when in use, and the precision of the vibration bench during testing is improved.

This invention relates to the fields of computer vision and intelligent detection technology, and particularly to a method and system for rapid recognition of multi-dimensional features of containers. The invention constructs a bidirectional closed-loop dynamic weighted multi-scale feature pyramid that includes top-down propagation and bottom-up calibration. Through the top-down path, high-level features provide semantic priors indicating the high probability of character presence, guiding shallower networks to focus on container number regions rather than background noise. Combined with dynamic weights, the contrast of characters can be adaptively adjusted under different lighting conditions, solving the problem of character breakage or adhesion caused by uneven lighting in existing technologies. Through the bottom-up calibration path, precise edge information contained in the multi-scale features is fed back to the deep aggregated features, enabling the deep aggregated features to achieve feature aggregation and calibration, thereby improving the positioning accuracy of subsequent detection heads.

This invention provides a small, long-tailed solid rocket motor, comprising a combustion chamber shell, a combustion chamber insulation layer, a propellant charge, an adjusting pad, a long tailed tube shell, a long tailed tube insulation layer, a nozzle shell, a nozzle insulation layer, a graphite throat liner, a plug, an electrode wire plug, a blunt-sensitive igniter, a pressure testing port plug, a connector mounting plate, and a short-circuit head. The propellant charge and adjusting pad are sequentially placed within the combustion chamber. The nozzle shell and long tailed tube shell are screwed together internally and externally. The blunt-sensitive igniter, via the electrode wire plug, connector mounting plate, and short-circuit head, is mounted on the side of the handle rib of the long tailed tube shell to provide short-circuit protection. The long tailed tube shell and combustion chamber shell are then assembled into the complete motor. This invention features high space utilization and minimal change in the center of gravity, resulting in a more rational structural layout.

This invention belongs to the field of polyolefin recycling technology and relates to a method for preparing high-quality carbon nanotubes by catalytic carbonization of polyolefins. In this invention, polyolefins are degraded at high temperature to generate small-molecule hydrocarbons. Subsequently, a Ni-Mo-Al catalyst undergoes a reduction reaction to generate elemental nickel. The elemental nickel catalyzes the degradation products to undergo dehydrogenation, cyclization, and aromatization reactions, followed by carbon deposition on the surface of the elemental nickel, which gradually grows into carbon nanotubes. Furthermore, the Ni-Mo-Al catalyst can reduce the formation of amorphous carbon, thereby increasing the activity of elemental nickel and reducing its ability to dissolve carbon, thus preparing carbon nanotubes with smaller diameters and uniform morphology. This invention has the advantages of inexpensive and readily available carbon sources and a simple preparation method, realizing the upgraded chemical recycling of waste polyolefins and the controllable preparation of carbon nanotubes, effectively solving the problem of reusing urban and industrial waste polyolefins.

This invention discloses a TOPCon battery and its fabrication method, belonging to the field of TOPCon battery technology. It includes a monocrystalline silicon wafer with a tunneling layer, a doped polycrystalline silicon layer, a back anti-reflection layer, and a back metal electrode sequentially disposed on its back side from the inside out. The doped polycrystalline silicon layer includes a first doped polycrystalline silicon region and a second doped polycrystalline silicon region. The first doped polycrystalline silicon region is in contact with the back metal electrode and is disposed on the surface of a groove. The tunneling oxide layer is relatively thin, and the inward junction depth is greater than that of the second doped polycrystalline silicon region. This effectively prevents electrode metal from penetrating into the junction region, reduces metal recombination current, and improves the battery's open-circuit voltage. Furthermore, the first doped polycrystalline silicon region has a larger contact area with the printing paste, reducing the battery's contact resistance. Simultaneously, the groove prevents the printing paste from widening outward, ensuring a high grid line aspect ratio, reducing grid line resistance, and thus improving the battery's fill factor.

A method for forming wiring includes: a first exposure step of forming a first resist layer on a main surface of a substrate and exposing the first resist layer with a predetermined wiring pattern; a second exposure step of forming a second resist layer on the exposed first resist layer and exposing the second resist layer with a predetermined wiring pattern; a development step of developing the exposed first resist layer and the exposed second resist layer to generate a resist pattern reflecting the predetermined wiring pattern; and a wiring forming step of forming wiring based on the resist pattern by electroplating.