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This invention discloses an image processing method based on wavelet transform, belonging to the field of image processing technology. The method includes: converting the RGB values ​​of the acquired image to Lab space and separating the L, a, and b channels; selecting wavelet transform and choosing the order of wavelet transform according to the image size; applying wavelet transform to the L channel to obtain the image coefficients of each layer; calculating the mean and variance of the image coefficients of each layer; and calculating the adjustment coefficient G of each layer. i The adjustment coefficient G is applied to each layer of the wavelet-transformed image. i Apply adjustment factor G to each image layer. i Then, an inverse wavelet transform is performed to recover the L channel; the processed L channel is restored to the range of [0,255]; the L, a, and b channels are merged and converted to RGB space to obtain the processed image; this method preserves the local details of the image, improves noise robustness, and improves computational efficiency.

This application relates to the technical field of semiconductor processing equipment components, specifically disclosing a special metal chamfering wheel for semiconductor silicon carbide wafers and its processing technology. The special metal chamfering wheel for semiconductor silicon carbide wafers is mainly made of the following raw materials in weight percentages: 7-8% micron-sized diamond, 23-27% copper-tin powder, 60-65% cobalt powder, 2-3% silver powder, and 2-3% silicon nitride powder. This special metal chamfering wheel, through the interaction of the raw materials, has advantages such as high hardness, good thermal conductivity, excellent wear resistance, and high stability during the grinding process, outperforming traditional chamfering wheels and making it suitable for processing silicon carbide wafers.

This invention relates to the field of food processing technology, specifically to a method for improving the starch structure and digestibility of sprouted corn flour, the prepared sprouted corn flour, and its applications. A method for improving the starch structure and digestibility of sprouted corn flour includes the following steps: S1, preparation of sprouted corn: soaking and germinating corn kernels to obtain sprouted corn; S2, microwave treatment: subjecting the sprouted corn to microwave treatment; S3, forced-air drying: subjecting the microwave-treated sprouted corn to forced-air drying until constant weight, obtaining dried sprouted corn; S4, pulverization: pulverizing and sieving the dried sprouted corn to obtain sprouted corn flour. This method not only significantly improves the drying efficiency of sprouted corn but also improves the starch structure characteristics of the sprouted corn flour, particularly increasing the content of resistant starch and reducing in vitro digestibility, thereby providing a high-quality raw material for developing corn-based foods with low digestibility or low glycemic index.

The invention discloses a preparation method of an adsorbent for removing heavy metals in municipal sludge. The method comprises the synthesis and modification processes of the adsorbent. The preparation method comprises the following steps: firstly, preparing an adsorbent precursor, preparing a mixed solution according to the ratio of a calcium source to a silicon source to sodium hydroxide to water being 4: (5-6): (11-40): (72-175), then transferring the obtained mixed solution into a hydrothermal reaction kettle with a polytetrafluoroethylene lining, and reacting for 10-12 hours under the conditions of 180-190 DEG C and 0.8-1.0 MPa; after the reaction is finished, washing, drying and grinding to obtain an adsorbent precursor; and then preparing the heavy metal adsorbent: mixing cerium chloride and water according to a mass ratio of 1: (30-50), and stirring for 30-60 minutes in a room temperature environment. The mass ratio of the adsorbent precursor to the cerium chloride solution is 1: (20-25), stirring at room temperature for 2-4 hours, standing for 1-2 hours, alternately washing with ethanol and deionized water for 3-5 times, and finally drying to obtain the adsorbent. The prepared adsorbent can be used for removing the heavy metals in the municipal sludge, the amount ratio of the adsorbent to the municipal sludge is 1: (200-250) when the adsorbent is used, and the highest value of the removal efficiency of each group after the reaction is carried out for 50-70 minutes at the temperature of 25-50 DEG C reaches 90% or above. The method effectively improves the removal effect of the heavy metals in the municipal sludge, and provides a solution for reducing the content of the heavy metals in the municipal sludge.