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Jianxuan, L., Zhihua, Z., Xiangming, Z., Jin, M., Lei, Z., & Rui, C. (2018). Study on Time-Frequency Calculation and Analysis Method of Frequency Spectrum Characteristic of Transient Frequency Conversion Signal. 2018 International Applied Computational Electromagnetics Society Symposium - China (ACES). doi:10.23919/acess.2018.8669388 
10.23919/ACESS.2018.8669388
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