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基于改进YOLOv5目标检测算法的口罩识别
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作者 王赫 王刚 +2 位作者 杨锋勇 范春媛 沈中昊 《自动化技术与应用》 2023年第9期1-5,62,共6页
为遏制疫情蔓延,正确佩戴口罩是有效的防护手段之一,但人工检测和监督的效率很低。基于深度学习网络模型的口罩实时自动检测在准确性和实时性方面还有待提升。在YOLOv5目标检测算法的基础上,创建人脸识别数据集MaskData。采用DIOU_nms... 为遏制疫情蔓延,正确佩戴口罩是有效的防护手段之一,但人工检测和监督的效率很低。基于深度学习网络模型的口罩实时自动检测在准确性和实时性方面还有待提升。在YOLOv5目标检测算法的基础上,创建人脸识别数据集MaskData。采用DIOU_nms方法替代NMS中的IOU,提高对遮挡和重叠目标的检测精度。最后,用α-CIoU损失函数替换GIOU损失函数,更快、更准确地获得更高质量的定位图像区域,生成边界框并预测类别。改进后的YOLOv5检测网络,对创建的数据集MaskData进行训练。实验结果表明,改进后的网络在94.45%的检测精度的基础上,提升到了95.2%,可以更准确地识别人脸是否戴口罩。 展开更多
关键词 YOLOv5 口罩识别 α-CIoU
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Molecular Cloning and Expression Analysis of a FT Homologous Gene from Solanum tuberosum 被引量:1
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作者 fan chun-yuan YIN Jing-ming +2 位作者 WANG Bing ZHANG Yun- feng YANG Qing 《Agricultural Sciences in China》 CSCD 2010年第8期1133-1139,共7页
A homologue of flowering locus T gene, designated StFT, was isolated from Solanum tuberosum by reverse transcriptasepolymerase chain reaction (accession no. GU223211). The DNA sequence of StFT was 1 626 bp long and ... A homologue of flowering locus T gene, designated StFT, was isolated from Solanum tuberosum by reverse transcriptasepolymerase chain reaction (accession no. GU223211). The DNA sequence of StFT was 1 626 bp long and contained four exons and three introns. The open reading frame of the gene was 522 bp long and encoded a putative protein of 173 amino acids with a molecular weight of 19.75 kD and a theoretical pI of 7.76. StFT protein had a conserved PBP domain and a higher degree of identity with FT homologous members from other species. Analysis on the mRNA levels of StFT showed that it was highly expressed in leaves, apical buds, flowers, and swelling stolons. Further analysis indicated that its expression was regulated by CONSTANS gene in StCOL-antisense transgenic potato plants. 展开更多
关键词 CLONING expression StFT gene Solanum tuberosum
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