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TIME-FREQUENCY: 作品数：161被引量：312H指数：9; 导出分析报告; 相关领域：电子电信更多>>; 相关作者：何川谭玉阳李晓春岳崇旺李长春更多>>; 相关机构：中国石油北京大学中国石油大学（华东）吉林大学更多>>; 相关期刊：更多>>; 相关基金：国家自然科学基金国家重点基础研究发展计划中国博士后科学基金国家高技术研究发展计划更多>>

HyTiFRec:Hybrid Time-Frequency Dual-Branch Transformer for Sequential Recommendation: 《Computers, Materials & Continua》2025年第5期1753-1769,共17页Dawei Qiu Peng Wu Xiaoming Zhang Renjie Xu; supported by a grant from the Natural Science Foundation of Zhejiang Province under Grant LY21F010016.; Recently,many Sequential Recommendation methods adopt self-attention mechanisms to model user preferences.However,these methods tend to focus more on low-frequency information while neglecting highfrequency informatio...; 关键词：Sequential recommendation frequency domain efficient attention

Fusion of Time-Frequency Features in Contrastive Learning for Shipboard Wind Speed Correction: 《Journal of Ocean University of China》2025年第2期377-386,共10页SONG Jian HUANG Meng LI Xiang ZHANG Zhenqiang WANG Chunxiao ZHAO Zhigang; supported by the Major Innovation Project for the Integration of Science,Education,and Industry of Qilu University of Technology(Shandong Academy of Sciences)(Nos.2023HYZX01,2023JBZ02);the Open Project of Key Laboratory of Computing Power Network and Information Security,Ministry of Education,Qilu University of Technology(Shandong Academy of Sciences)(No.2023ZD007);the Talent Research Projects of Qilu University of Technology(Shandong Academy of Sciences)(No.2023RCKY136);the Technology and Innovation Major Project of the Ministry of Science and Technology of China(No.2022ZD0118600);the Jinan‘20 New Colleges and Universities’Funded Project(No.202333043)。; Accurate wind speed measurements on maritime vessels are crucial for weather forecasting,sea state prediction,and safe navigation.However,vessel motion and challenging environmental conditions often affect measurement...; 关键词：time series prediction wind speed correction comparative learning shipborne sensor

Predictive Generation for Digital Twin Channel:Long-Batch Time-Frequency Construction: 《China Communications》2025年第4期161-173,共13页Che Chang Hu Jie Kang Honghui Rui Hua Lyu Xingzai Wang Bo; Wireless communication systems that incorporate digital twin(DT)alongside artificial intelligence(AI)are expected to transform 6G networks by providing advanced features for predictive modeling and decision making.The...; 关键词：channel generation channel prediction deep learning digital twin(DT) generative adversarial network(GAN)

Deep Time-Frequency Denoising Transform Defense for Spectrum Monitoring in Integrated Networks: 《Tsinghua Science and Technology》2025年第2期851-863,共13页Sicheng Zhang Yandie Yang Songlin Yang Juzhen Wang Yun Lin; The Space-Air-Ground-Sea Integrated Networks(SAGSIN)significantly enhance global communication by merging satellite,aviation,terrestrial,and marine networks.Crucial to SAGSIN’s functionality and security is spectrum ...; 关键词：Space-Air-Ground-Sea Integrated Networks(SAGSIN) spectrum monitoring adversarial defense Deep Time-Frequency Denoising Transformation(DTFDT) transformation module

Ultra-linear FMCW laser based on time-frequency self-injection locking: 《Photonics Research》2025年第1期31-39,共9页JICHEN ZHANG SHANGYUAN LI XIAOPING ZHENG XIAOXIAO XUE; National Key Research and Development Program of China(2021YFB2800602);National Natural Science Foundation of China(62127805);Fundamental Research Funds for the Central Universities(2242022k60006);Open Research Fund of Key Laboratory of All Optical Network and Advanced Telecommunication Network,Ministry of Education,Beijing Jiaotong University(AON2024K02).; Frequency-modulated continuous-wave(FMCW)light sources are essential components for coherent light detection and ranging(LiDAR),which is ubiquitously utilized in autonomous driving,industrial monitoring,and geological...; 关键词：laser LIDAR INJECTION

Analyzing time-frequency connectedness between cryptocurrencies,stock indices,and benchmark crude oils during the COVID-19 pandemic: 《Financial Innovation》2024年第1期939-966,共28页Majid Mirzaee Ghazani Ali Akbar Momeni Malekshah Reza Khosravi; We used daily return series for three pairs of datasets from the crude oil markets(WTI and Brent),stock indices(the Dow Jones Industrial Average and S&P 500),and benchmark cryptocurrencies(Bitcoin and Ethereum)to exam...; 关键词：TIME-FREQUENCY COVID-19 Wavelet coherence SPILLOVER VOLATILITY

Study on Coupled Motion of Floating Hydrogen Storage Platform with Liquid Hydrogen Sloshing被引量：1: 《China Ocean Engineering》2024年第6期999-1011,共13页ZHANG Jian SHI Sheng-quan YUAN Hong-tao YANG Kang; supported by the National Natural Science Foundation of China(Grant No.51979130).; The production of hydrogen on offshore platform can decrease reliance on the power grid,mitigate transmission losses of electricity,and diminish investment costs for subsea cables.In this study,the hydrodynamic perfor...; 关键词：liquid hydrogen liquid sloshing motion coupling VOF method time-frequency response dynamics behavior thermodynamic response

Examining time-frequency quantile dependence between green bond and green equity markets: 《Financial Innovation》2024年第1期753-780,共28页Md.Bokhtiar Hasan Gazi Salah Uddin Md.Sumon Ali Md.Mamunur Rashid Donghyun Park Sang Hoon Kang; supported by the Ministry of Education of the Republic of Korea and the National Research Foundation of Korea(NRF-2022S1A5A2A01038422).; In the context of the rapidly growing demand for green investments and the need to combat climate change,this study contributes to the emerging literature on green investments by exploring the time-frequency connected...; 关键词：Green bond Green equity Frequency connectedness Quantile dependency DIVERSIFICATION

Intelligent recognition and information extraction of radar complex jamming based on time-frequency features: 《Journal of Systems Engineering and Electronics》2024年第5期1148-1166,共19页PENG Ruihui WU Xingrui WANG Guohong SUN Dianxing YANG Zhong LI Hongwen; supported by Shandong Provincial Natural Science Foundation(ZR2020MF015);Aerospace Technology Group Stability Support Project(ZY0110020009).; In modern war,radar countermeasure is becoming increasingly fierce,and the enemy jamming time and pattern are changing more randomly.It is challenging for the radar to efficiently identify jamming and obtain precise p...; 关键词：complex jamming recognition time frequency feature convolutional neural network(CNN) parameter estimation

QTFN:A General End-to-End Time-Frequency Network to Reveal the Time-Varying Signatures of the Time Series: 《Big Data Mining and Analytics》2024年第3期905-919,共15页Tao Chen Yang Jiao Lei Xie Hongye Su; supported by the National Key R&D Program of China(No.2022YFB3305900);the Shenzhen Key Laboratory of Intelligent Bioinformatics(No.ZDSYS20220422103800001);and the National Natural Science Foundation of China(No.62073286).; Nonstationary time series are ubiquitous in almost all natural and engineering systems.Capturing the time-varying signatures from nonstationary time series is still a challenging problem for data mining.Quadratic Time...; 关键词：Time-Frequency Analysis(TFA) Multi-scale Residual Encoder-Decoder(MRED) quadratic Time-Frequency Distribution(TFD)

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