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煤岩损伤破坏ULF电磁感应实验研究被引量：2
《煤炭学报》2012年第10期1658-1664,共7页王恩元 贾慧霖 李楠 宋大钊 
国家自然科学基金资助项目(40874070);国家自然科学基金青年科学基金资助项目(50904067);教育部新世纪优秀人才支持计划资助项目(NCET-10-0768)
利用建立的煤岩声-电信号测试系统,对强度较低的煤岩试样进行了单轴压缩、剪切加载破坏实验,测试研究了ULF(1 kHz)、VLF(5 kHz)、LF(300 kHz)等频段电磁辐射及42.3 kHz声发射(AE)信号规律,并初步探讨了煤岩变形破坏ULF电磁信号的产生机...
关键词：煤岩体 损伤破坏 电磁感应 ULF 
Correlation length around Mars:A statistical study with MEX and MAVEN observations被引量：1
《Earth and Planetary Physics》2019年第6期560-569,共10页Adriane Marques de Souza Franco Markus Franz Ezequiel Echer Mauricio JoséAlves Bolzan 
FAPESP agency for support (projects 2016/10794-2 and 2017/00516-8);FAPESP (2018/21657-1) agencies;supported by FAPEG (grant no. 201210267000905);CNPq (grants no. 302330/2015-1),CNPq (project CNPq/PQ 302583/20157)
Correlation lengths of ultra-low-frequency(ULF)waves around Mars were computed for the first time,using data from MEX(electron density from 2004 to 2015)and MAVEN(electron density and magnetic field from 2014 to 2016)...
关键词：MARS induced MAGNETOSPHERE ULF WAVES correlation length 
智能化超低频频率特性测试仪
《电子与自动化》1994年第4期13-15,共3页王忠勇 
阐述了以ＭＣＳ－９８单片机为核心的超低频频率特性测试仪的基本原理，并详细介绍了超低频信号产生电路、频率测量电路、单片机主电路及系统软件设计。该仪器硬件结构简单，软件设计灵活，具有测量范围宽、精度高、使用方便等特点。
关键词：频率特性 测试仪 微处理机 
Detection of ULF electromagnetic emissions as a precursor to two earthquakes in China被引量：17
《Earthquake Science》2011年第6期601-607,共7页Qi Li Peiyu Zhu Alimj an Mamatemin Xuegong Xu 
financially supported by the Special Project for Earthquake Research(200708033)
The geomagnetic data recorded by Kashi and Jinghai observatories in China were analyzed with improved polarization method. We compared the result around 0.01 Hz which is thought to be useful to detect the ULF anomaly ...
关键词：ULF anomaly geomagnetic data polarization analysis earthquake precursor 
Numerical simulation of magnetospheric ULF waves excited by positive and negative impulses of solar wind dynamic pressure被引量：6
《Science China(Technological Sciences)》2009年第10期2886-2894,共9页ZHANG XiangYun ZONG QiuGang YANG Biao WANG YongFu 
Supported by the National Natural Science Foundation of China (Grant No. 40831061)
The sources of ultra low frequency (ULF) waves in the magnetosphere are generally believed to be either the external solar wind perturbations or the internal plasma instabilities. When a sudden impulse of the solar wi...
关键词：POSITIVE and NEGATIVE IMPULSES of solar wind dynamic pressure ULF waves field line RESONANCES (FLRs) 
全球化时代的城市空间和环境
《城市规划学刊》2007年第4期I0002-I0002,共1页
Ulf Kristersson，瑞典斯德哥尔摩市副市长，演讲“斯德哥尔摩市” 介绍了斯德哥尔摩是斯堪的纳维亚的文化之都，它的空间与环境以及相关的环境项目。最后就斯德哥尔摩作为斯堪的纳维亚的首都，总结了学到的经验和它现在城市的状况。
关键词：城市空间 环境 斯德哥尔摩市 全球化 斯堪的纳维亚 ULF 
A possible UL Fseismice lectro-magnetic emission　
《Acta Seismologica Sinica(English Edition)》1995年第3期463-471,共9页李兴才 曹惠馨 俞铁宏 
A possible electro-magnetic emission (EME) associated with earthquakes are presented in the paper throughanalysis of the anomaly EME in ultra-low frequency range (ULF) observed at some sites before two earthquakesnear...
关键词：electro-magnetic emission short-impeding Prediction ULF frequency band 
On the Anomalies in ULF Magnetic Field Variations Prior to the 2008 Sichuan Earthquake被引量：1
《Open Journal of Earthquake Research》2015年第2期55-64,共10页Qi Li Alexander Schekotov Tomokazu Asano Masashi Hayakawa 
There have been reported several papers on the ionospheric F region perturbations prior to the 2008 Sichuan earthquake (EQ) (magnitude 8.0), but it seems that very few reports have been published on the characteristic...
关键词：EARTHQUAKE EARTHQUAKE Prediction ULF Magnetic Variation LITHOSPHERIC ULF Radiation ULF DEPRESSION 
Fast acceleration of “killer” electrons and energetic ions by interplanetary shock stimulated ULF waves in the inner magnetosphere被引量：11
《Chinese Science Bulletin》2011年第12期1188-1201,共14页ZONG QiuGang WANG YongFu YUAN ChongJing YANG Biao WANG ChenRui ZHANG XiangYun 
supported by the National Natural Science Foundation of China (40831061 and 41074117);the Specialized Research Fund for State Key Laboratories
Energetic electrons and ions in the Van Allen radiation belt are the number one space weather threat. Understanding how these energetic particles are accelerated within the Van Allen radiation belt is one of the major...
关键词：行星际激波 高能离子 高能电子 地球磁层 ULF 激波加速 粒子相互作用 电子回旋共振 
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 
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