2results about How to "Improve preference" patented technology

The invention relates to a training method, an audio-visual segmentation method, an electronic device and a storage medium, and the method comprises the steps: obtaining a training sample which comprises an audio signal, an image, a target semantic tag and a segmentation tag; extracting audio features and image features, and performing self-attention enhancement on the audio features based on the target semantic tag to apply target semantic consistency constraint to obtain enhanced audio features; performing cross attention reweighting on the unenhanced audio features based on the guidance of the enhanced audio features to obtain target pointing audio features; bidirectional interactive fusion is executed based on the image features and the target pointing audio features, and a sparse self-attention network is adopted in the image feature fusion process to suppress unmatched image region response; generating a segmentation prediction result based on the fused image features and audio features, and training to obtain an audiovisual segmentation model; and inputting a to-be-processed video into the trained audio-visual segmentation model, and outputting a segmentation result. The image segmentation accuracy of the sounding target can be improved.

This invention discloses a method with NMN + A preferred glucose-6-phosphate dehydrogenase mutant and its preparation method were investigated. Using the TmG6PDH-R7 mutant as the starting protein, random mutations were performed using error-prone PCR to construct a random mutant library. A high-throughput screening method for positive clones on plates was used to obtain the clones with the most obvious color development. Recombinant bacteria were cultured and purified to obtain the mutants. After three rounds of screening, NMN with amino acid sequences as shown in SEQ ID NO.6, SEQ ID NO.8, or SEQ ID NO.10 was obtained. + A glucose-6-phosphate dehydrogenase mutant with enhanced preference, achieving NMN + The specific enzyme activity of TmG6PDH coenzyme is increased. The mutant with the amino acid sequence shown in SEQ ID NO.10 has more than 5 times higher specific enzyme activity at 37 degrees compared with the R7 mutant with the highest specific enzyme activity, and has good application prospects in industrial production.