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基于神经网络的学生行为检测算法研究 被引量:4
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作者 苏寒松 刘腾腾 +1 位作者 刘高华 田曦初 《激光与光电子学进展》 CSCD 北大核心 2020年第22期177-183,共7页
关于行为检测的算法有很多,但针对教室场景下的学生行为检测算法却略显缺乏。为了使学生行为检测算法具有较好的准确率和实时性,在MTCNN的基础上改进了网络结构,并提出了一种新的激活函数和损失函数以检测学生图像和关键点。同时,提出... 关于行为检测的算法有很多,但针对教室场景下的学生行为检测算法却略显缺乏。为了使学生行为检测算法具有较好的准确率和实时性,在MTCNN的基础上改进了网络结构,并提出了一种新的激活函数和损失函数以检测学生图像和关键点。同时,提出了通过图像分类网络和关键点分类网络对学生行为进行联合分类的策略。实验结果表明,所提出的改进措施均有效提升了学生行为检测的准确率,最终模型的检测准确率为78.6%。在嵌入式开发板Jetson TX2上,所提算法的实时检测准确率和速度优于YOLOv3和SSD等算法。 展开更多
关键词 图像处理 机器视觉 神经网络 行为检测 教室场景
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Anti-diabetic effects of linarin from Chrysanthemi Indici Flos via AMPK activation 被引量:2
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作者 Zhenji Wang Zhe Bai +5 位作者 Jinghua Yan tengteng liu Yingmei Li Jiahui Xu Xiaoqian Meng Yuefeng Bi 《Chinese Herbal Medicines》 CAS 2022年第1期97-103,共7页
Objective:The purpose of this study is to investigate the anti-diabetic effects of linarin,a flavonoid extracted from Chrysanthemi Indici Flos(CIF),and its potential mechanisms.Methods:The effects of linarin on cell v... Objective:The purpose of this study is to investigate the anti-diabetic effects of linarin,a flavonoid extracted from Chrysanthemi Indici Flos(CIF),and its potential mechanisms.Methods:The effects of linarin on cell viability and glucose consumption in Hep G2 cells were measured.Meanwhile,monosodium glutamate(MSG) mouse model was constructed to monitor the changes of insulin tolerance,glucose tolerance,triglyceride and cholesterol.The protein expression levels of pAMPK,p-ACC,PEPCK and p-GS were detected by Western blot.Results:Linarin could increase the relative glucose consumption of Hep G2 cells,improve insulin tolerance and glucose tolerance,and decrease the levels of triglyceride and cholesterol of MSG mice.Simultaneously,the expression levels of p-AMPK and p-ACC in Hep G2 cells and the liver tissue of MSG mice were increased,while the expression levels of PEPCK and p-GS were decreased after treatment with linarin.Conclusion:Insulin resistance could be ameliorated by linarin in type 2 diabetes,and its mechanism may be related to AMPK signaling pathway. 展开更多
关键词 AMPK anti-diabetes Chrysanthemi Indici Flos insulin resistance LINARIN type 2 diabetes
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Taxonomic review on Acrocercopinae,Gracillariinae and Ornixolinae from Shandong,China,with new data on distribution and host associations(Lepidoptera:Gracillariidae)
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作者 Yurong Jiang Yang Zhao +2 位作者 Encui Wang Tongyou Zhang tengteng liu 《Zoological Systematics》 CSCD 2021年第3期240-257,共18页
Thirteen species of Gracillariidae,belonging to three subfamilies,Acrocercopinae,Gracillariinae and Ornixolinae,are reviewed from Shandong,China.Three species are recorded from China for the first time:Calybites secur... Thirteen species of Gracillariidae,belonging to three subfamilies,Acrocercopinae,Gracillariinae and Ornixolinae,are reviewed from Shandong,China.Three species are recorded from China for the first time:Calybites securinella(Ermolaev,1986),Eteoryctis picrasmae Kumata&Kuroko,1988,and Spulerina parthenocissi Kumata&Kuroko,1988.All species are described in detail except Liocrobyla indigofera Liu,Wang&Wang,2018,with the illustrations of adults,male and female genitalia. 展开更多
关键词 Host plants new record China MICROLEPIDOPTERA
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