Intelligent fault diagnosis technology plays an indispensable role in ensuring the safety,stability,and efficiency of railway operations.However,existing studies have the following limitations.1)They are typical black-...Intelligent fault diagnosis technology plays an indispensable role in ensuring the safety,stability,and efficiency of railway operations.However,existing studies have the following limitations.1)They are typical black-box models that lacks interpretability as well as they fuse features by simply stacking them,overlooking the discrepancies in the importance of different features,which reduces the credibility and diagnosis accuracy of the models.2)They ignore the effects of potentially mistaken labels in the training datasets disrupting the ability of the models to learn the true data distribution,which degrades the generalization performance of intelligent diagnosis models,especially when the training samples are limited.To address the above items,an interpretable few-shot framework for fault diagnosis with noisy labels is proposed for train transmission systems.In the proposed framework,a feature extractor is constructed by stacked frequency band focus modules,which can capture signal features in different frequency bands and further adaptively concentrate on the features corresponding to the potential fault characteristic frequency.Then,according to prototypical network,a novel metric-based classifier is developed that is tolerant to mislabeled support samples in the case of limited samples.Besides,a new loss function is designed to decrease the impact of label mistakes in query datasets.Finally,fault simulation experiments of subway train transmission systems are designed and conducted,and the effectiveness as well as superiority of the proposed method are proved by ablation experiments and comparison with the existing methods.展开更多
The nucleolus is the primary site of ribosomal DNAs(rDNAs)transcription and ribosome assembly within the nucleus[1],playing a crucial role in protein synthesis and cell growth.rDNA transcription is a tightly regulated...The nucleolus is the primary site of ribosomal DNAs(rDNAs)transcription and ribosome assembly within the nucleus[1],playing a crucial role in protein synthesis and cell growth.rDNA transcription is a tightly regulated process involving multiple molecular factors,including RNA Polymerase I(Pol I),UBF,SL1[1],TCOF1[2],etc.While it is well-established that noncoding RNAs(ncRNAs)can encode microproteins(preferentially as proteins)that function in various aspects of cell fates[3–5],whether such proteins have functions in nucleoli is largely unknown.展开更多
基金supported in part by the National Key R&D Program of China under Grant 2022YFB4300601in part by the State Key Laboratory of Advanced Rail Autonomous Operation under Grant RAO2023ZZ003.
文摘Intelligent fault diagnosis technology plays an indispensable role in ensuring the safety,stability,and efficiency of railway operations.However,existing studies have the following limitations.1)They are typical black-box models that lacks interpretability as well as they fuse features by simply stacking them,overlooking the discrepancies in the importance of different features,which reduces the credibility and diagnosis accuracy of the models.2)They ignore the effects of potentially mistaken labels in the training datasets disrupting the ability of the models to learn the true data distribution,which degrades the generalization performance of intelligent diagnosis models,especially when the training samples are limited.To address the above items,an interpretable few-shot framework for fault diagnosis with noisy labels is proposed for train transmission systems.In the proposed framework,a feature extractor is constructed by stacked frequency band focus modules,which can capture signal features in different frequency bands and further adaptively concentrate on the features corresponding to the potential fault characteristic frequency.Then,according to prototypical network,a novel metric-based classifier is developed that is tolerant to mislabeled support samples in the case of limited samples.Besides,a new loss function is designed to decrease the impact of label mistakes in query datasets.Finally,fault simulation experiments of subway train transmission systems are designed and conducted,and the effectiveness as well as superiority of the proposed method are proved by ablation experiments and comparison with the existing methods.
基金supported by the National Key Research and Development Program of China(2022YFC3401001)the National Natural Science Foundation of China(82430094 and 82025029)the Start-up Research Fund of Southeast University(RF1028623018).
文摘The nucleolus is the primary site of ribosomal DNAs(rDNAs)transcription and ribosome assembly within the nucleus[1],playing a crucial role in protein synthesis and cell growth.rDNA transcription is a tightly regulated process involving multiple molecular factors,including RNA Polymerase I(Pol I),UBF,SL1[1],TCOF1[2],etc.While it is well-established that noncoding RNAs(ncRNAs)can encode microproteins(preferentially as proteins)that function in various aspects of cell fates[3–5],whether such proteins have functions in nucleoli is largely unknown.
