The smartphone has become an indispensable electric device for most people since it can assist us in finishing many tasks such as paying and reading. Therefore, the security of smartphones is the most crucial issue to...The smartphone has become an indispensable electric device for most people since it can assist us in finishing many tasks such as paying and reading. Therefore, the security of smartphones is the most crucial issue to illegal users who cannot access legal users’ privacy information. This paper studies identity authentication using user action. This scheme does not rely on the password or biometric identification. It checks user identity just by user action features. We utilize sensors installed in smartphones and collect their data when the user waves the phone. We collect these data, process them and feed them into neural networks to realize identity recognition. We invited 13 participants and collected about 350 samples for each person. The sampling frequency is set at 200 Hz, and DenseNet is chosen as the neural network to validate system performance. The result shows that the neural network can effectively recognize user identity and achieve an authentication accuracy of 96.69 percent.展开更多
Beta-amylase(BAM)plays an important role in plant resistance to cold stress.However,the specific role of the BAM gene in freezing tolerance is poorly understood.In this study,we demonstrated that a cold-responsive gen...Beta-amylase(BAM)plays an important role in plant resistance to cold stress.However,the specific role of the BAM gene in freezing tolerance is poorly understood.In this study,we demonstrated that a cold-responsive gene module was involved in the freezing tolerance of kiwifruit.In this module,the expression of AaBAM3.1,which encodes a functional protein,was induced by cold stress.AaBAM3.1-overexpressing kiwifruit lines showed increased freezing tolerance,and the heterologous overexpression of AaBAM3.1 in Arabidopsis thaliana resulted in a similar phenotype.The results of promoter GUS activity and cis-element analyses predicted AaCBF4 to be an upstream transcription factor that could regulate AaBAM3.1 expression.Further investigation of protein-DNA interactions by using yeast one-hybrid,GUS coexpression,and dual luciferase reporter assays confirmed that AaCBF4 directly regulated AaBAM3.1 expression.In addition,the expression of both AaBAM3.1 and AaCBF4 in kiwifruit responded positively to cold stress.Hence,we conclude that the AaCBF-AaBAM module is involved in the positive regulation of the freezing tolerance of kiwifruit.展开更多
文摘The smartphone has become an indispensable electric device for most people since it can assist us in finishing many tasks such as paying and reading. Therefore, the security of smartphones is the most crucial issue to illegal users who cannot access legal users’ privacy information. This paper studies identity authentication using user action. This scheme does not rely on the password or biometric identification. It checks user identity just by user action features. We utilize sensors installed in smartphones and collect their data when the user waves the phone. We collect these data, process them and feed them into neural networks to realize identity recognition. We invited 13 participants and collected about 350 samples for each person. The sampling frequency is set at 200 Hz, and DenseNet is chosen as the neural network to validate system performance. The result shows that the neural network can effectively recognize user identity and achieve an authentication accuracy of 96.69 percent.
基金the National Science Foundation of China(Grant No.31801820)the National Key Research and Development Project of China(Grant No.2019YFD1000800)+1 种基金the Special Engineering Science and Technology Innovation,Chinese Academy of Agricultural Sciences(Grant No.CAAS-ASTIP-2015-ZFRI)the Modern Agricultural Industrial Technology System of Henan Province(Grant No.S2014-11).
文摘Beta-amylase(BAM)plays an important role in plant resistance to cold stress.However,the specific role of the BAM gene in freezing tolerance is poorly understood.In this study,we demonstrated that a cold-responsive gene module was involved in the freezing tolerance of kiwifruit.In this module,the expression of AaBAM3.1,which encodes a functional protein,was induced by cold stress.AaBAM3.1-overexpressing kiwifruit lines showed increased freezing tolerance,and the heterologous overexpression of AaBAM3.1 in Arabidopsis thaliana resulted in a similar phenotype.The results of promoter GUS activity and cis-element analyses predicted AaCBF4 to be an upstream transcription factor that could regulate AaBAM3.1 expression.Further investigation of protein-DNA interactions by using yeast one-hybrid,GUS coexpression,and dual luciferase reporter assays confirmed that AaCBF4 directly regulated AaBAM3.1 expression.In addition,the expression of both AaBAM3.1 and AaCBF4 in kiwifruit responded positively to cold stress.Hence,we conclude that the AaCBF-AaBAM module is involved in the positive regulation of the freezing tolerance of kiwifruit.
