[1] Lv C G, Huo Z Q, Cheng X et al. Distributed optical fiber sensing intrusion pattern recognition based on GAF and CNN[J]. Journal of Lightwave Technology, 38, 4174-4182(2020).

[2] Juarez J C, Taylor H F. Field test of a distributed fiber-optic intrusion sensor system for long perimeters[J]. Applied Optics, 46, 1968-1971(2007).

[3] Wu H J, Chen J P, Liu X R et al. One-dimensional CNN-based intelligent recognition of vibrations in pipeline monitoring with DAS[J]. Journal of Lightwave Technology, 37, 4359-4366(2019).

[4] Xu C J, Guan J J, Bao M et al. Pattern recognition based on enhanced multifeature parameters for vibration events in φ-OTDR distributed optical fiber sensing system[J]. Microwave and Optical Technology Letters, 59, 3134-3141(2017).

[5] Sun Q, Zeng Z M, Li J. Application of relevance vector machine in pattern recognition of optical fiber pre-warning system[J]. Journal of Tianjin University (Science and Technology), 47, 1115-1120(2014).

[6] Tejedor J, Macias-Guarasa J, Martins H et al. A novel fiber optic based surveillance system for prevention of pipeline integrity threats[J]. Sensors, 17, 355(2017).

[7] Xu C J, Guan J J, Bao M et al. Pattern recognition based on time-frequency analysis and convolutional neural networks for vibrational events in φ-OTDR[J]. Optical Engineering, 57, 016103(2018).

[8] Chen X, Xu C J. Disturbance pattern recognition based on an ALSTM in a long-distance φ-OTDR sensing system[J]. Microwave and Optical Technology Letters, 62, 168-175(2020).

[9] Vaswani A, Shazeer N, Parmar N et al. Attention is all You need[C], 6000-6010(2017).

[10] Gong Y A, Chung Y A, Glass J. AST: audio spectrogram transformer[C], 571-575(2021).

[11] Gong Y, Khurana S, Rouditchenko A et al. CMKD: CNN/transformer-based cross-model knowledge distillation for audio classification[EB/OL]. https://arxiv.org/abs/2203.06760

[12] Chen K, Du X J, Zhu B L et al. HTS-AT: a hierarchical token-semantic audio transformer for sound classification and detection[C], 646-650(2022).

[13] Kim B, Chang S, Lee J et al. Broadcasted residual learning for efficient keyword spotting[C], 4538-4542(2021).

[14] Wu J, Guan L Y, Bao M et al. Vibration events recognition of optical fiber based on multi-scale 1-D CNN[J]. Opto-Electronic Engineering, 46, 180493(2019).

[15] Hinton G, Vinyals O, Dean J. Distilling the knowledge in a neural network[J]. Computer Science, 14, 38-39(2015).

[16] Selvaraju R R, Cogswell M, Das A et al. Grad-CAM: visual explanations from deep networks via gradient-based localization[C], 618-626(2017).