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LOW-FREQUENCY: 作品数：363被引量：709H指数：12; 导出分析报告; 相关作者：崔建忠韩立国刘伟贺振华钟文丽更多>>; 相关机构：中国石油化工集团公司中国石油大学（华东）东北大学吉林大学更多>>; 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国家高技术研究发展计划中国博士后科学基金更多>>

Causes of Winter Persistent Extreme Cold Events in Northeastern China: 《Advances in Atmospheric Sciences》2025年第4期780-793,共14页Ming YANG Qingjiu GAO Tim LI; supported by the National Natural Science Foundation of China(Grant Nos.42088101 and 42075032).; Persistent(5-day or longer)extreme cold events(ECEs)over northeastern China during the boreal winter of 1979–2020 are investigated using daily minimum temperature(Tmin)from the China Meteorological Data Network.The e...; 关键词：extreme cold events low-frequency ISO mode Rossby wave train composite analysis downward propagation potential vorticity

Modulation of suprathermal electron fluxes by ultra-low-frequency magnetic field fluctuations in the Martian foreshock: 《Earth and Planetary Physics》2025年第2期357-365,共9页TaiFeng Jin BinBin Ni Song Fu XiaoTong Yun ShuYue Pang MinYi Long QiongYue Zhang Nan Wang XinJie Xiong YiBin Zhao FangFei Shi; supported by the National Natural Science Foundation of China (Grant Nos. 42188101, 42174188, 42474217, 42330207, 42374193, 42241143, and 42025404);the National Key R&D Program of China (Grant Nos. 2022YFF0503700 and 2022YFF0503900)。; Ultra-low-frequency(ULF) waves are ubiquitous in terrestrial and planetary environments, playing a crucial role in energy transfer and dissipation through wave–particle interactions within space plasmas. By performin...; 关键词：Martian foreshock ULF waves electron modulation

Low-frequency metamaterial antenna based on magnetic field coupling effect: 《Science China(Technological Sciences)》2025年第4期82-93,共12页Zilun ZENG Jingqi WU Chenxi ZHANG Liwei WANG Zidong ZHANG Yunsheng GUO Jianchun XU Ke BI; supported by the National Natural Science Foundation of China(Grant Nos.U2241243,52102061,52372101);Beijing Natural Science Foundation(Grant No.JQ22010);the Fundamental Research Funds for the Central Universities(Grant No.2023ZCJH03);the Teaching Reform Projects at BUPT(Grant No.2024Y010);the Fund of State Key Laboratory of IPOC(BUPT)(Grant No.IPOC2024ZT13)。; Low-frequency(LF)electromagnetic waves have high penetration and low attenuation characteristics in media,making them essential for cross-media communications.In LF communication systems,the loop antenna commonly func...; 关键词：low frequency communication METAMATERIAL magnetic resonant coupling wireless communication

Lightweight multifunctional metamaterial with low-frequency vibroacoustic reduction and load-bearing performances: 《Applied Mathematics and Mechanics(English Edition)》2025年第3期403-422,共20页Qi JIA Dianlong YU Donghai HAN Jihong WEN; Project supported by the National Natural Science Foundation of China(Nos.11991032 and 52241103);the Hunan Province Graduate Research Innovation Project of China(No.KY0409052440)。; Metamaterials can control and manipulate acoustic/elastic waves on a subwavelength scale using cavities or additional components.However,the large cavity and weak stiffness components of traditional metamaterials may ...; 关键词：multifunctional metamaterial low-frequency sound insulation broadband vibration reduction load bearing

Low-frequency chatter suppression in robotic milling using Magnetorheological Joint Damper(MRJD): 《Chinese Journal of Aeronautics》2025年第3期521-543,共23页Shihao XIN Xiaowei TANG Jiawei WU Fangyu PENG Rong YAN Kai SUN; supported by the National Natural Science Foundation of China(No.U20A20294);the National Natural Science Foundation of China(No.52322511);the National Natural Science Foundation of China(No.52188102).; Low-frequency structural vibrations caused by poor rigidity are one of the main obstacles limiting the machining efficiency of robotic milling.Existing vibration suppression strategies primarily focus on passive vibra...; 关键词：Magnetorheological fluids Joint damper Vibration suppressioni Low-frequency chatter Robotic milling

Low-Frequency Sweep Design—A Case Study in Middle East Desert Environments: 《Applied Geophysics》2025年第1期71-83,233,共14页Qi Yong-fei Wei Zhou-hong Nie Ming-tao Li Guo-fa Wang Tao Ling Hai Cong Sheng-kui Chen Xin-yang Duan Chang-ping Liu Yang; The authors would like to express their sincere appreciation to the research project of CNPC Geophysical Key Lab(2022DQ0604-4);National Natural Science Foundation of China(Grant No.42074141).; Low-frequency vibroseis acquisition has become a routine operation in land seismic surveys,given the advantages of low-frequency signals in characterizing geological structures and enhancing the imaging of deep explor...; 关键词：VIBROSEIS Low-frequency sweep design

Broadband low-frequency sound absorption of multifunctional composite metastructure: 《Science China(Technological Sciences)》2025年第2期114-124,共11页Yilong YANG Shanshan LIU Yan LI Tong GAO Yongdong PAN Yong LI Yabin JIN; supported by the National Key R&D Program of China(Grant No.2022YFB4602000);the National Natural Science Foundation of China(Grant No.12272267);the Young Elite Scientists Sponsorship Program by CAST(Grant No.2021QNRC001);Shanghai Science and Technology Committee(Grant Nos.22JC1404100,21JC1405600);the Fundamental Research Funds for the Central Universities;the Special Funds of the Tongji University for“Sino-German Cooperation 2.0 Strategy”;Shanghai Gaofeng Project for University Academic Program Development.; In this study,we fabricated multifunctional metastructures from carbon fiber-reinforced plastic composites using additive manufacturing technology.These metastructures are characterized by their lightweight,load-beari...; 关键词：composite metastructure broadband sound absorption additive manufacturing

Research on Low-Frequency Multi-Directional Piezoelectric Energy Harvester with Combined Cantilever Beam: 《Chinese Journal of Electronics》2025年第1期156-164,共9页Qingying Ren Yuxuan Liu Debo Wang; supported in part by the National Natural Science Foundation of China(Grant No.61904085);in part by the China Postdoctoral Science Foundation(Grant No.2017M621692);in part by the Postgraduate Research&Practice Innovation Program of Jiangsu Province(Grant No.KYCX22_0260)。; In order to realize the collection and utilization of low-frequency vibration energy,a multi-directional piezoelectric energy harvester is proposed,which consists of a lower circular arc beam and an upper L-shaped bea...; 关键词：Low frequency Multi-directionality Vibration energy harvesting Resonant frequency Output power

Low-frequency signal generation in space based on high-frequency electric-antenna array and Doppler effect: 《Journal of Systems Engineering and Electronics》2025年第1期24-36,共13页CUI Anjing LI Daojing WU Jiang GAO Jinghan ZHOU Kai HU Chufeng WU Shumei SHI Danni LI Guang; Science and Technology Project of Aerospace Information Research Institute,Chinese Academy of Sciences(Y910340Z2F);Science and Technology Project of BBEF(E3E2010201)。; Low-frequency signals have been proven valuable in the fields of target detection and geological exploration.Nevertheless,the practical implementation of these signals is hindered by large antenna diameters,limiting t...; 关键词：frequency conversion array signal processing experimental verification Doppler effect

Detecting the Bull’s-Eye Effect in Seismic Inversion Low-Frequency Models Using the Optimized YOLOv7 Model: 《Applied Geophysics》2024年第4期766-776,880,881,共13页Jun Li Jia-bing Meng Pan Li; To detect bull’s-eye anomalies in low-frequency seismic inversion models,the study proposed an advanced method using an optimized you only look once version 7(YOLOv7)model.This model is enhanced by integrating advanc...; 关键词：bull’s-eye YOLO bidirectional feature pyramid network weighted intersection-over-union atrous spatial pyramid pooling

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