5results about How to "Avoid time-consuming problems" patented technology

The invention provides a system frequency response estimation method and system based on a fault position, and belongs to the technical field of new energy power grids, and the method comprises the steps: constructing a new energy multi-operation-state model; solving the node voltage of the state model after the fault based on the superposition principle and iterative calculation, establishing a mapping model of the fault position and the low-cross cluster, obtaining the initial value of the active power vacancy, and comprehensively considering the difference between the initial value of the active power vacancy and the active recovery rate between stations at different fault positions. Calculating the system-level total active power vacancy considering the station low-voltage crossing characteristic difference; and constructing a system frequency response model based on the frequency modulation capability difference caused by the fault position, and estimating the system frequency response by adopting the response model. According to the invention, quantitative description of active power vacancy and system equivalent frequency modulation capability loss after disturbance at different fault positions is realized, so that the accuracy of frequency response analysis is improved.

This invention provides a method, apparatus, device, and medium for extracting water body information based on remote sensing data, comprising: acquiring multispectral image data of a target area; constructing a water body mask image corresponding to the target area based on the multispectral image data; initializing a threshold population corresponding to the water body mask image, iteratively updating the threshold population, and determining a target segmentation threshold corresponding to the water body mask image based on the iteratively updated threshold population; generating a binary image of the water body corresponding to the target area based on the target segmentation threshold; and constructing sample data based on the binary image of the water body, so as to extract water body objects contained in the target area based on the sample data using a water body information extraction model. This invention can automatically generate high-precision sample images, thereby improving the tedious and time-consuming problems caused by manual sample annotation, improving sample annotation efficiency, and significantly improving the accuracy of water body object extraction.

The invention relates to the field of heat treatment equipment, in particular to a sintering furnace with a preheating function, which comprises a sintering furnace body, a sealing cover, a holding furnace and the like, the sintering furnace body is connected with a sealing cover; a heat preservation furnace is installed on the sintering furnace body. Two different furnace bodies including the sintering furnace body and the heat preservation furnace are arranged, two temperature areas are divided, the sintering furnace body is kept in high-temperature operation all the time, the heat preservation furnace is used for preheating materials, preliminarily cooling the sintered materials and transferring the materials in the different temperature areas, and therefore uninterrupted continuous sintering treatment is achieved; the problem that in the prior art, a large amount of time is consumed due to the fact that a single sintering furnace body is directly heated and cooled is solved, the sintering efficiency is effectively improved, waste heat of the sintering furnace body is used for preheating materials, additional heating equipment is not needed, and therefore the heat energy utilization rate is increased, and the heat transfer speed is increased.

This invention relates to the field of additive manufacturing, specifically to a method and system for calibrating the substrate height of a 3D printing device based on machine vision. The method includes: S1, initializing the system and parameters; S2, acquiring a substrate image; S3, determining the substrate height; S4, coarsely adjusting the substrate height; S5, acquiring a powder-spreading image; S6, calculating indicators based on the powder-spreading image; S7, determining whether to perform substrate height adjustment; S8, determining whether to perform fine-tuning of the substrate height; S9, fine-tuning the substrate height; and S10, loop control and termination conditions. The system includes a metal 3D printing device, an industrial camera, a vision reference calibration block, and a control system. This invention monitors the substrate height and powder-spreading state using machine vision, and achieves precise control of the first layer of powder-spreading state using a two-stage precision adjustment height calibration mechanism.

The utility model discloses a wheat seed airing device for breeding belongs to wheat seed airing device technical field. A wheat seed airing device for breeding, including support frame and rotating installation on the airing box of support frame, the airing box mainly comprises airing board and upper cover body, and the closed space is formed between airing board and upper cover body, wherein, the first baffle is fixedly installed in airing board, the second baffle is fixedly installed in upper cover body, and the first baffle and the second baffle all have wave crest and wave trough, and the wave crest of first baffle and second baffle staggeredly sets up, and the wave trough of first baffle and second baffle forms airing area, the utility model uses the cooperation of first baffle and second baffle and airing box, and after rotating airing box, can make wheat seed drop to the airing area of second baffle, makes wheat seed complete the effect of turning over, and the ventilation part of setting up simultaneously can improve the ventilation effect in airing area.