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Photon Structure and Wave Function from the Vector Potential Quantization
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作者 Constantin Meis 《Journal of Modern Physics》 CAS 2023年第3期311-329,共19页
A photon structure is advanced based on the experimental evidence and the vector potential quantization at a single photon level. It is shown that the photon is neither a point particle nor an infinite wave but behave... A photon structure is advanced based on the experimental evidence and the vector potential quantization at a single photon level. It is shown that the photon is neither a point particle nor an infinite wave but behaves rather like a local “wave-corpuscle” extended over a wavelength, occupying a minimum quantization volume and guided by a non-local vector potential real wave function. The quantized vector potential oscillates over a wavelength with circular left or right polarization giving birth to orthogonal magnetic and electric fields whose amplitudes are proportional to the square of the frequency. The energy  and momentum are carried by the local wave-corpuscle guided by the non-local vector potential wave function suitably normalized. 展开更多
关键词 PHOTONS Photon wave function Vector Potential quantization Photon Electric and magnetic Fields Photon Structure wave-Corpuscle Representation Photon “Energy-Vector Potential” Equation
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Electrostatic Attraction and Repulsion Explained and Modelled Mathematically Using Classical Physics—A Detailed Mechanism Based on Particle Wave Functions
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作者 Declan Traill 《Journal of Applied Mathematics and Physics》 2024年第4期1050-1062,共13页
The phenomenon of electrical attraction and repulsion between charged particles is well known, and described mathematically by Coulomb’s Law, yet until now there has been no explanation for why this occurs. There has... The phenomenon of electrical attraction and repulsion between charged particles is well known, and described mathematically by Coulomb’s Law, yet until now there has been no explanation for why this occurs. There has been no mechanistic explanation that reveals what causes the charged particles to accelerate, either towards or away from each other. This paper gives a detailed explanation of the phenomena of electrical attraction and repulsion based on my previous work that determined the exact wave-function solutions for both the Electron and the Positron. It is revealed that the effects are caused by wave interactions between the wave functions that result in Electromagnetic reflections of parts of the particle’s wave functions, causing a change in their momenta. 展开更多
关键词 ELECTROSTATIC Electron POSITRON COULOMB Force ATTRACTION REPULSION wave function Electric magnetic Radiation Pressure Shell THEOREM 3D Computer Model Quantum
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Mathematical Wave Functions and 3D Finite Element Modelling of the Electron and Positron
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作者 Declan Traill 《Journal of Applied Mathematics and Physics》 2024年第4期1134-1162,共29页
The wave/particle duality of particles in Physics is well known. Particles have properties that uniquely characterize them from one another, such as mass, charge and spin. Charged particles have associated Electric an... The wave/particle duality of particles in Physics is well known. Particles have properties that uniquely characterize them from one another, such as mass, charge and spin. Charged particles have associated Electric and Magnetic fields. Also, every moving particle has a De Broglie wavelength determined by its mass and velocity. This paper shows that all of these properties of a particle can be derived from a single wave function equation for that particle. Wave functions for the Electron and the Positron are presented and principles are provided that can be used to calculate the wave functions of all the fundamental particles in Physics. Fundamental particles such as electrons and positrons are considered to be point particles in the Standard Model of Physics and are not considered to have a structure. This paper demonstrates that they do indeed have structure and that this structure extends into the space around the particle’s center (in fact, they have infinite extent), but with rapidly diminishing energy density with the distance from that center. The particles are formed from Electromagnetic standing waves, which are stable solutions to the Schrödinger and Classical wave equations. This stable structure therefore accounts for both the wave and particle nature of these particles. In fact, all of their properties such as mass, spin and electric charge, can be accounted for from this structure. These particle properties appear to originate from a single point at the center of the wave function structure, in the same sort of way that the Shell theorem of gravity causes the gravity of a body to appear to all originate from a central point. This paper represents the first two fully characterized fundamental particles, with a complete description of their structure and properties, built up from the underlying Electromagnetic waves that comprise these and all fundamental particles. 展开更多
关键词 ELECTRON POSITRON wave function Solution Electromagnetic Spin Mass Charge Proof Fundamental Particle Properties Quantum Mechanics Classical Physics Computer 3D Model Schrödinger Equation RMS KLEIN GORDON Electric magnetic Lorentz Invariant Hertzian Vector Point Potential Field Density Phase Flow Attraction REPULSION Shell Theorem Ehrenfest VIRIAL Normalization Harmonic Oscillator
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Modeling Density and Anisotropy of Energetic Electrons Along Magnetic Field Lines 被引量:3
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作者 肖伏良 冯学尚 《Plasma Science and Technology》 SCIE EI CAS CSCD 2006年第3期279-284,共6页
The electromagnetic wave growth or damping depends basically on the number density and anisotropy of energetic particles as the resonant interaction takes place between the particles and waves in the magnetosphere. Th... The electromagnetic wave growth or damping depends basically on the number density and anisotropy of energetic particles as the resonant interaction takes place between the particles and waves in the magnetosphere. The variance of both the number density and anisotropy along the magnetic field line is evaluated systematically by modeling four typically prescribed distribution functions. It is shown that in the case of "the positive anisotropy" (namely, the perpendicular temperature T⊥ exceeds the parallel temperature T||), the number density of energetic electrons always decreases with the magnetic latitude for a regular increasing magnetic field and the maximum wave growth is therefore generally confined to the equator where the resonant energy is minimum, and the number density is the largest. However, the "loss-cone" anisotropy of the electrons with a "pancake" distribution or kappa distribution keeps invariant or nearly invariant, whereas the "temperature" anisotropy with a pure bi-Maxwellian distribution or Ashour-Abdalla and Kennel's distributions decreases with the magnetic latitude. The results may provide a useful approach to evaluating the number density and anisotropy of the energetic electrons at latitudes where the observation information is not available. 展开更多
关键词 number density ANISOTROPY distribution function magnetic field line
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Dispersion Dynamical Magnetic Radius in Intrinsic Spin Equals the Compton Wavelength
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作者 Antony J. Bourdillon 《Journal of Modern Physics》 2018年第13期2295-2307,共13页
Because magnetic moment is spatial in classical magnetostatics, we progress beyond the axiomatic concept of the point particle electron in physics. Orbital magnetic moment is well grounded in spherical harmonics in a ... Because magnetic moment is spatial in classical magnetostatics, we progress beyond the axiomatic concept of the point particle electron in physics. Orbital magnetic moment is well grounded in spherical harmonics in a central field. There, quantum numbers are integral. The half-integral spinor moment appears to be due to cylindrical motion in an external applied magnetic field;when this is zero , the spin states are degenerate. Consider lifting the degeneracy by diamagnetism in the cylindrical magnetic field: a uniquely derived electronic magnetic radius shares the identical value to the Compton wavelength. 展开更多
关键词 magnetic RADIUS INTRINSIC SPIN COMPTON waveLENGTH DISPERSION Dynamics Stable wave Packet Special Relativity Propagation Transverse Plane functions of Relativistic Free Particles Quantum Physics Quantum Mechanics
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Quantum and Classical Exact Solutions of Harmonic Oscillator in a Time-Dependent Magnetic Field
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作者 LIANGMai-Lin LIULi-Yan 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第6期1027-1029,共3页
In cylindrical coordinate, exact wave functions of the two-dimensional time-dependent harmonic oscillator in a time-dependent magnetic field are derived by using the trial function method. Meanwhile, the exact classic... In cylindrical coordinate, exact wave functions of the two-dimensional time-dependent harmonic oscillator in a time-dependent magnetic field are derived by using the trial function method. Meanwhile, the exact classical solution as well as the classicalphase is obtained too. Through the Heisenberg correspondence principle, the quantum solution and the classical solution are connected together. 展开更多
关键词 harmonic oscillator magnetic field exact wave function exact classicalsolution
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Statistical Characteristics of Scattered Radiation in Medium With Spatial-temporal Fluctuations of Electron Density and External Magnetic Field
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作者 George V. Jandieri Natalia N. Zhukova +1 位作者 Irma G. Takidze Ivane V. Jandieri 《Journal of Electromagnetic Analysis and Applications》 2012年第6期243-251,共9页
Influence of temporal fluctuations of both electron density and external magnetic field fluctuations on scattered ordinary and extraordinary waves in magnetized plasma is investigated using the ray-(optics) method. Tr... Influence of temporal fluctuations of both electron density and external magnetic field fluctuations on scattered ordinary and extraordinary waves in magnetized plasma is investigated using the ray-(optics) method. Transport equation for frequency fluctuations of scattered radiation has been derived. Broadening of the spatial power spectrum and amplification of the intensity of frequency fluctuation taking into account geometry of the task and the features of turbulent magnetized plasma is analyzed for the anisotropic Gaussian correlation function using the remote sensing data. It is shown that spatial-temporal fluctuations of electron density and external magnetic field, anisotropy and angle of inclination of prolate irregularities relative to the external magnetic field may lead to the exponential amplification of the intensity of frequency fluctuations of scattered electromagnetic waves in the collisional magnetized plasma. 展开更多
关键词 FLUCTUATIONS CORRELATION function SCATTERING MAGNETIZED Plasma Phase PORTRAIT Extraordinary wave
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Basic Quantum Magnetic Interaction Based on Detailed Gauss Meter Measurements
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作者 Bhekuzulu Khumalo 《Open Journal of Microphysics》 2022年第1期1-30,共30页
Understanding that the magnetic phenomenon is both a particle, khumalon, that organizes itself into a wave formation to travel through a medium, this paper shows proof of this in detail. It can only be doing this beca... Understanding that the magnetic phenomenon is both a particle, khumalon, that organizes itself into a wave formation to travel through a medium, this paper shows proof of this in detail. It can only be doing this because it is traveling through some medium. This paper is about observing relationships that are a result of different polarized magnetic phenomenon forced into relationships. The magnet shows it does not behave differently from other particles;when they have relationships with their “anti” particle, annihilation takes place. Two magnets will always be like a collider, but because the magnetic phenomenon is already unstable and of low energy allows us to see things otherwise difficult with particles of higher energy. Isaac Newton is truly needed in explaining this phenomenon. The magnetic phenomenon adheres to the first two laws of everything. All data can be found on figshare.com, to share. 展开更多
关键词 Isaac Newton Khumalon line of Silence/Annihilation magnetic wave MAGNETISM Particle Annihilation Quantum Magnetism
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重复经颅磁刺激联合体外冲击波治疗在脑卒中偏瘫患者中的应用效果
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作者 李志勇 唐震宇 黄颖 《中国当代医药》 CAS 2024年第30期32-35,40,共5页
目的探讨在脑卒中偏瘫患者中采取重复经颅磁刺激(rTMS)联合体外冲击波治疗(ESWT)的作用。方法选取2021年1月至2023年12月九江市第一人民医院收治的100例脑卒中偏瘫患者作为研究对象,采用随机数字表法分为对照组和观察组,每组各50例。对... 目的探讨在脑卒中偏瘫患者中采取重复经颅磁刺激(rTMS)联合体外冲击波治疗(ESWT)的作用。方法选取2021年1月至2023年12月九江市第一人民医院收治的100例脑卒中偏瘫患者作为研究对象,采用随机数字表法分为对照组和观察组,每组各50例。对照组采取ESWT干预,观察组在对照组的基础上采取rTMS干预,两组患者均持续干预观察4周。比较两组患者上肢痉挛状态、上肢运动功能、日常生活活动能力以及生活质量。结果干预前,两组上肢痉李状态、上肢运动功能、日常生活活动能力以及生活质量比较,差异无统计学意义(P>0.05)。干预后,观察组改良Ashworth挛评定量表(MAS)评分低于对照组,简化Fugl-Meyer运动功能评分法-上肢部分(FMA-UE)评分、改良Barthel指数(MBI)评分高于对照组,差异有统计学意义(P<0.05);干预后,观察组生存质量简表(QOL-BREF)中周围环境、社会关系、心理健康等维度评分均高于对照组,差异有统计学意义(P<0.05)。结论rTMS联合ESWT干预可改善脑卒中偏瘫患者上肢挛状态和上肢运动功能,有效提升患者日常生活活动能力,进而改善患者生活质量。 展开更多
关键词 脑卒中偏瘫 重复经颅磁刺激 体外冲击波治疗 上肢痊李 上肢运动功能 日常生活活动能力
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基于线图的无权脑超网络超边学习及融合特征分类
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作者 上官学奎 黄晓妍 +1 位作者 王春燕 郭浩 《科学技术与工程》 北大核心 2024年第21期9002-9014,共13页
脑功能超网络已广泛用于脑疾病的分类诊断中。在现有研究中,研究人员集中于改进脑功能超网络的构建却忽略了脑超网络拓扑对于分类诊断的影响,大多使用节点特征表征脑网络的拓扑。而研究表明超边信息能够弥补超网络的特征,同时超边间的... 脑功能超网络已广泛用于脑疾病的分类诊断中。在现有研究中,研究人员集中于改进脑功能超网络的构建却忽略了脑超网络拓扑对于分类诊断的影响,大多使用节点特征表征脑网络的拓扑。而研究表明超边信息能够弥补超网络的特征,同时超边间的传递有助于整体学习。考虑到该问题,提出基于线图的无权脑功能超网络超边学习,以分析超边对脑功能超网络拓扑和分类性能的影响。具体来说,首先,基于功能磁共振数据,使用星型扩展方法构建脑功能超网络;其次使用线图理论构建超网络的线图模型;然后使用超边密度提取线图的局部属性特征并使用非参数检验方法进行局部特征选择;接着使用基于图的子结构模式挖掘算法提取线图的子图特征并使用频繁分数特征选择方法选取判别子图;最后分别利用支持向量机构建分类模型。结果表明,所提方法分类结果优于传统脑功能超网络分类结果,达到86.79%。这表明脑功能超网络模型的超边拓扑信息影响分类模型的构建。此外,基于线图模型所求得的融合特征优于任一单一类型的特征,达到88.68%。可见对于超边拓扑信息提取,不仅需要考虑超边的属性信息,还需考虑超边间的空间传递信息能力。 展开更多
关键词 静息态功能磁共振影像 脑功能超网络 线图 超边密度 机器学习 阿尔兹海默症
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重复经颅磁刺激对精神分裂症患者的影响
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作者 于海英 田建华 《中外医药研究》 2024年第15期42-44,共3页
目的:探讨重复经颅磁刺激对精神分裂症患者的影响。方法:选取2023年1—12月石河子绿洲医院收治的精神分裂症患者60例作为研究对象,以随机数表法分为常规组和试验组,各30例。常规组采用利培酮、认知功能训练治疗,试验组在常规组基础上采... 目的:探讨重复经颅磁刺激对精神分裂症患者的影响。方法:选取2023年1—12月石河子绿洲医院收治的精神分裂症患者60例作为研究对象,以随机数表法分为常规组和试验组,各30例。常规组采用利培酮、认知功能训练治疗,试验组在常规组基础上采用重复经颅磁刺激治疗。比较两组5-羟色胺(5-HT)、去甲肾上腺素(NE)水平,脑电波频率,认知功能[基于修订的韦氏记忆量表(WMS-RC)和威斯康星卡片测验系统(WCST)]。结果:治疗前,两组5-HT、NE水平比较,差异无统计学意义(P>0.05);治疗后,两组5-HT、NE水平低于治疗前,试验组低于常规组,差异有统计学意义(P<0.05)。治疗前,两组β波、θ波和SMR波频率比较,差异无统计学意义(P>0.05);治疗后,两组β波、θ波和SMR波频率高于治疗前,试验组高于常规组,差异有统计学意义(P<0.05)。治疗前,两组WMS-RC、WCST评分比较,差异无统计学意义(P>0.05);治疗后,两组WMS-RC、WCST评分低于治疗前,试验组低于常规组,差异有统计学意义(P<0.05)。结论:重复经颅磁刺激可以调节精神分裂症患者的不良情绪,改善神经功能及认知功能。 展开更多
关键词 精神分裂症 重复经颅磁刺激 脑电波 神经功能 认知功能
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Frequency Tunability and Slow-Wave Characteristics of a High-Efficiency Ridged MILO
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作者 Xiaoyu Wang Baoping Yang +6 位作者 Xu Xu Yuwei Fan Ting Shu Ankun Li Zeyang Liu Xiaomin Wang Bing Han 《Journal of Computer and Communications》 2020年第12期91-101,共11页
<div style="text-align:justify;"> A high-efficiency ridged magnetically insulated transmission line oscillator (RMILO) is proposed and investigated theoretically and numerically in this paper. In the R... <div style="text-align:justify;"> A high-efficiency ridged magnetically insulated transmission line oscillator (RMILO) is proposed and investigated theoretically and numerically in this paper. In the RMILO, ridge-disk vanes are introduced to enhance the power efficiency. Theoretical investigation shows that the ridge-disk can enhance the coupling impedance of the slow-wave structure (SWS), and so enhance the power efficiency. Moreover, the ridge has a weak influence on frequency, so, it influences little on the tunability of the MILO. In simulation, when the applied voltage is increased to 807 kV, the RMILO can get the 3 dB tunable frequency range with 7.6 - 13.9 GHz and the 3 dB tuning bandwidth with 58.6% which has an increase of 27.6% compared with the conventional MILO. So, the tuning performance of the RMILO is more superior. Besides, the RMILO gets the maximum output power of 7.1 GW, the corresponding power efficiency is 22.6% and the frequency is 1.400 GHz. Furthermore, when the applied voltage is increased to 807 kV, high-power microwave with a power of 13.5 GW, frequency of 1.400 GHz, and ef?ciency of 24.5% is generated, which has an increase of 20.2% compared with the conventional MILO. The simulation results con?rm the ones predicted by theoretical analysis. </div> 展开更多
关键词 magnetically Insulated Transmission line Oscillator Slow wave Structure High Conversion Efficiency
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AB双层磁性薄膜的界面自旋波
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作者 邱荣科 张欣荣 刘忠菊 《沈阳工业大学学报》 CAS 北大核心 2023年第3期278-283,共6页
针对非对称AB双层磁性薄膜中自旋波的分布问题,采用量子格林函数方法研究了不同界面参数对界面自旋波在二维布里渊区中占有面积的影响.结果表明:非对称AB双层磁性薄膜中存在两支界面自旋波,第4原子层界面自旋波存在于中温区间,第5原子... 针对非对称AB双层磁性薄膜中自旋波的分布问题,采用量子格林函数方法研究了不同界面参数对界面自旋波在二维布里渊区中占有面积的影响.结果表明:非对称AB双层磁性薄膜中存在两支界面自旋波,第4原子层界面自旋波存在于中温区间,第5原子层界面自旋波存在于全温区间;随着温度的升高,两支界面自旋波的占有面积先增大后减小;随着外磁场的升高,两支界面自旋波的占有面积减小;随着界面层间交换耦合、界面层内交换耦合和界面各向异性的增加,第4原子层界面自旋波的占有面积增加,第5原子层界面自旋波的占有面积减小. 展开更多
关键词 海森堡模型 量子格林函数 AB双层磁性薄膜 界面自旋波 界面层间交换耦合 界面层内交换耦合 界面各向异性 布里渊区
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体外磁波盆底治疗对阴道分娩产妇盆底肌功能恢复效果 被引量:4
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作者 林敏芬 吴红波 +2 位作者 陈洁 袁晓玲 余馨 《中国计划生育学杂志》 2023年第5期1099-1104,共6页
目的:探究体外磁波盆底治疗对阴道分娩产妇盆底肌功能恢复效果。方法:选取2022年4-10月本院行阴道分娩产妇102例,随机数字表法分为两组各51例,分别采用常规盆底肌训练(常规组)及常规组基础上实施体外磁波盆底治疗(磁波组),均治疗3个月... 目的:探究体外磁波盆底治疗对阴道分娩产妇盆底肌功能恢复效果。方法:选取2022年4-10月本院行阴道分娩产妇102例,随机数字表法分为两组各51例,分别采用常规盆底肌训练(常规组)及常规组基础上实施体外磁波盆底治疗(磁波组),均治疗3个月。比较两组盆底肌电Glazer评估、盆底功能障碍状况、产后并发症、肌纤维疲劳水平及阴道动态压、产后漏尿情况。结果:治疗后两组快肌收缩最大值、10s慢肌收缩平均值、60s慢肌收缩平均值均得到提升,且磁波组高于常规组;磁波组盆底障碍影响问卷(21.99±4.38分)、盆底功能障碍量表评分(19.24±5.57分)均低于常规组(30.84±4.65分、28.53±4.88分);产后下腹坠胀感、便秘、尿频等并发症总发生率磁波组(9.8%)低于常规组(37.3%),肌纤维疲劳指数及阴道动态压改善优于常规组;治疗后2 d、10周、3个月,磁波组压力性尿失禁评分(5.17±0.84分、4.86±0.42分、3.15±0.34分)均低于常规组(6.66±1.12分、5.54±0.62分、4.73±0.55分)(均P<0.05)。Pearson相关分析,阴道分娩产妇盆底肌功能与压力性尿失禁呈负相关。结论:阴道分娩产妇行体外磁波盆底治疗,可有效促进盆底肌功能恢复,降低产后并发症发生率,明显改善肌纤维疲劳及阴道动态压,安全性及疗效显著。 展开更多
关键词 阴道分娩 盆底康复 体外磁波 盆底肌功能 压力性尿失禁 产后并发症
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主观认知下降及轻度认知障碍患者默认网络的静息态fMRI研究 被引量:4
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作者 韦懿宸 梁玲艳 +4 位作者 黎晓程 张清萍 段高雄 刘颖 邓德茂 《中国临床新医学》 2023年第4期305-310,共6页
目的分析主观认知下降(SCD)和轻度认知障碍(MCI)默认网络(DMN)的异常改变,揭示其演变规律,以期为阿尔茨海默病(AD)的早期诊断提供影像学依据。方法纳入SCD患者35例,MCI患者88例,健康对照(HC)者32名。收集受试者的相关临床数据、神经心... 目的分析主观认知下降(SCD)和轻度认知障碍(MCI)默认网络(DMN)的异常改变,揭示其演变规律,以期为阿尔茨海默病(AD)的早期诊断提供影像学依据。方法纳入SCD患者35例,MCI患者88例,健康对照(HC)者32名。收集受试者的相关临床数据、神经心理学量表评估数据以及3D-T1WI及静息态血氧水平依赖功能磁共振成像(BOLD-fMRI)数据。以后扣带回(PCC)作为种子点,分析SCD、MCI的DMN功能连接变化。结果与HC组相比,SCD组双侧前扣带回(ACC)的功能连接降低,右侧额下回的功能连接增强;MCI组双侧海马及海马旁回、右侧额上回/左侧ACC、部分右侧颞中回/角回的功能连接降低,右侧中央前回、双侧岛叶/双侧额下回、右侧中扣带回/右腹侧ACC、右侧补充运动区、左侧小脑的功能连接增强。结论随着疾病的进展,MCI在SCD的DMN功能连接变化的基础上出现了更为广泛的功能连接异常,提示了SCD是介于MCI和正常老年人之间的中间阶段。 展开更多
关键词 阿尔茨海默病 轻度认知障碍 主观认知下降 默认网络 功能磁共振成像
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Multi-spacecraft observations of ULF waves during the recovery phase of magnetic storm on October 30, 2003 被引量:11
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作者 YongFu Wang SuiYan Fu +4 位作者 QiuGang Zong Biao Yang ZuYin Pu Lun Xie XuZhi Zhou 《Science China(Technological Sciences)》 SCIE EI CAS 2008年第10期1772-1785,共14页
Based on observations obtained by Cluster C1, GOES 10, 12, and Polar, the global ULF wave properties are studied during the recovery phase of a very intense magnetic storm-Halloween storm (October 31, 2003, 21:00–23:... Based on observations obtained by Cluster C1, GOES 10, 12, and Polar, the global ULF wave properties are studied during the recovery phase of a very intense magnetic storm-Halloween storm (October 31, 2003, 21:00–23:00 UT). The results indicate that the ULF waves’ properties observed by different satellites, such as amplitude, period, etc. show large variations. This can be interpreted as that Field Line Resonance (FLR) might take place in the region where Cluster C1 passed. The compressional wave of the cavity mode coupled with FLR’s shear Alfven wave and fed energy to the latter, forming a large-amplitude toroidal mode. From the point of period, Cluster C1 observed the shortest period, GOES 10, 12 observed the middle, while Polar observed the longest. The wave period of toroidal mode observed by Cluster C1 kept almost unchanging when Cluster C1 passed L range from 11.7 to 5.3. Using the Squared Wavelet Coherence analysis method, we estimated that the FLR region in the dayside magnetosphere could expand to at least 4 local time widths. The toroidal mode observed by Polar was a standing wave, while the poloidal mode was a propagating wave, the observation results could be well explained by the waveguide mode theory. Since the solarwind speed V <SUB>x</SUB> was &#8722;800 km/s and the dynamic pressure varied little, we speculated that the source of the ULF wave was the Kelvin-Helmholtz instability at the magnetopause triggered by high speed solarwind. 展开更多
关键词 magnetic STORM ULF wave poloidal MODE TOROIDAL MODE compressional MODE cavity MODE Field line Resonance (FLR)
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利用磁环构造配电线路边界的单端量全线速动保护(2):基于电压行波峰值时间的保护原理
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作者 常仲学 闫吉飞 +4 位作者 张志华 徐瑞东 王毅钊 宋国兵 刘健 《电网技术》 EI CSCD 北大核心 2023年第5期1864-1873,共10页
以交、直流配电网为研究对象,分析了线路两侧安装磁环后区内、外故障电压行波陡度和峰值时间的差异,提出了基于模电压行波峰值时间的单端量全线速动保护原理,分析了故障类型、过渡电阻、故障初相角、分支线路、中性点接地方式以及雷击... 以交、直流配电网为研究对象,分析了线路两侧安装磁环后区内、外故障电压行波陡度和峰值时间的差异,提出了基于模电压行波峰值时间的单端量全线速动保护原理,分析了故障类型、过渡电阻、故障初相角、分支线路、中性点接地方式以及雷击等暂态干扰对对判据的影响并提出了相应对策,理论分析、仿真和实验结果表明该文的方法可以可靠识别交、直流配电网线路的区内外故障,具有仅利用单端电压即可保护线路全长、动作速度快、可理论整定的优点。 展开更多
关键词 磁环 边界元件 配电网 单端全线速动保护 电压行波 峰值时间
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发散式体外冲击波对原发性痛经患者疼痛、情绪及脑功能的即刻影响
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作者 刘珊珊 杨坚 《中国康复医学杂志》 CAS CSCD 北大核心 2023年第11期1541-1549,共9页
目的:探讨发散式体外冲击波(r ESWT)对经期原发性痛经(PDM)患者疼痛、情绪的即刻疗效,并通过静息态功能磁共振(rs-f MRI)观察r ESWT对PDM脑功能的影响。方法:39例PDM患者被随机分为冲击波组(20例)和安慰剂组(19例)。采用简式Mc Gill疼... 目的:探讨发散式体外冲击波(r ESWT)对经期原发性痛经(PDM)患者疼痛、情绪的即刻疗效,并通过静息态功能磁共振(rs-f MRI)观察r ESWT对PDM脑功能的影响。方法:39例PDM患者被随机分为冲击波组(20例)和安慰剂组(19例)。采用简式Mc Gill疼痛问卷(SF-MPQ)、中文版COX痛经症状量表(CMSS)、焦虑自评量表(SAS)和抑郁自评量表(SDS)评估患者的痛经强度、症状、焦虑和抑郁情绪,通过rs-f MRI记录分数低频振幅(f ALFF)。比较患者非经期(月经周期的第12—16天)、经期(月经来潮48h内)治疗前、后的SAS、SDS和f ALFF的差异,经期治疗前、后的SF-MPQ和CMSS的差异。结果:经期治疗后,两组SF-MPQ、CMSS、SAS较经期治疗前均下降(P<0.001),组间无显著差异;两组SDS得分在组内和组间均无显著差异;经期治疗后,冲击波组左侧颞中回的f ALFF较非经期下降(P<0.001)。结论:单次冲击波未即刻改善PDM患者经期的疼痛强度、痛经症状、焦虑、抑郁情绪及静息态脑功能活动。 展开更多
关键词 发散式体外冲击波 原发性痛经 静息态功能磁共振 分数低频振幅 焦虑 抑郁
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盆底康复体外磁波治疗仪在产后压力性尿失禁患者中的应用效果观察 被引量:2
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作者 刘志琴 邓伟萍 《保健医学研究与实践》 2023年第9期134-138,共5页
目的 探讨盆底康复体外磁波治疗仪在产后压力性尿失禁(PSUI)患者中的应用效果,以期为临床治疗提供参考。方法选取2020年2月—2022年2月江西省宜黄县妇幼保健和计划生育服务中心收治的PSUI患者60例为研究对象。采用随机数字表法将患者分... 目的 探讨盆底康复体外磁波治疗仪在产后压力性尿失禁(PSUI)患者中的应用效果,以期为临床治疗提供参考。方法选取2020年2月—2022年2月江西省宜黄县妇幼保健和计划生育服务中心收治的PSUI患者60例为研究对象。采用随机数字表法将患者分为对照组和观察组,每组30例。对照组患者采用常规护理,观察组患者在对照组基础上加用盆底康复体外磁波治疗仪干预。出院时比较2组患者治疗效果、1 h尿垫试验及24 h漏尿量。比较2组患者护理前后(护理后为出院时)盆底肌力恢复情况、尿失禁问卷简表(ICIQ-SF)评分、焦虑自评量表(SAS)评分、女性性功能量表(FSFI)评分、阴道静息压力(VRP)和盆底肌(PFM)力量、耐力;应用盆底三维超声测量2组患者护理前后(护理后为出院时)肛提肌裂孔面积和膀胱颈活动度。结果 观察组患者治疗有效率为93.33%,高于对照组的73.33%,差异有统计学意义(P<0.05)。护理前,2组患者1 h尿垫试验及24 h漏尿量比较,差异无统计学意义(P>0.05)。护理后,2组患者1 h尿垫试验及24 h漏尿量均少于护理前,且观察组少于对照组,差异均有统计学意义(P<0.05)。观察组患者盆底肌力情况优于对照组,差异有统计学意义(P<0.05)。护理前,2组患者ICIQ-SF及SAS评分比较,差异无统计学意义(P>0.05)。护理后,2组患者ICIQ-SF及SAS评分均低于护理前,且观察组低于对照组,差异均有统计学意义(P<0.05)。观察组患者性生活质量水平分布优于对照组,差异有统计学意义(P<0.05)。护理前,2组患者肛提肌裂孔面积及膀胱颈活动度比较,差异无统计学意义(P>0.05)。护理后,2组患者肛提肌裂孔面积及膀胱颈活动度均小于护理前,且观察组小于对照组,差异均有统计学意义(P<0.05)。护理前,2组患者VRP和PFM力量、耐力水平比较,差异无统计学意义(P>0.05)。护理后,2组患者VRP和PFM力量、耐力水平均大于护理前,且观察组大于对照组,差异均有统计学意义(P<0.05)。结论 对PSUI患者行盆底康复体外磁波治疗仪干预,能够改善患者的漏尿情况,提高其盆底肌力及性生活质量,降低患者焦虑程度,护理干预效果确切,值得临床推广使用。 展开更多
关键词 产后压力性尿失禁 盆底康复体外磁波治疗仪 盆底功能
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Joint observations of the large-scale ULF wave activity from space to ground associated with the solar wind dynamic pressure enhancement
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作者 SUN XiaoYing HU YunPeng +3 位作者 ZHIMA Zeren DUAN SuPing LV FangXian SHEN XuHui 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2024年第7期2215-2229,共15页
This study reports the rare ultralow-frequency(ULF) wave activity associated with the solar wind dynamic pressure enhancement that was successively observed by the GOES-17(Geostationary Operational Environmental Satel... This study reports the rare ultralow-frequency(ULF) wave activity associated with the solar wind dynamic pressure enhancement that was successively observed by the GOES-17(Geostationary Operational Environmental Satellite) in the magnetosphere, the CSES(China Seismo-Electromagnetic Satellite) in the ionosphere, and the THEMIS ground-based observatories(GBO) GAKO and EAGL in the Earth's polar region during the main phase of an intense storm on 4 November 2021. Along with the enhanced-pressure solar wind moving tailward, the geomagnetic field structure experienced a large-scale change. From dawn/dusk sides to midnight, the GAKO, EAGL, and GOES-17 sequentially observed the ULF waves in a frequency range of0.04–0.36 Hz at L shells of ~5.07, 6.29, and 5.67, respectively. CSES also observed the ULF wave event with the same frequency ranges at wide L-shells of 2.52–6.22 in the nightside ionosphere. The analysis results show that the ULF waves at ionospheric altitude were mixed toroidal-poloidal mode waves. Comparing the ULF waves observed in different regions, we infer that the nightside ULF waves were directly or indirectly excited by the solar wind dynamic pressure increase: in the area of L-shells~2.52–6.29, the magnetic field line resonances(FLRs) driven by the solar wind dynamic pressure increase is an essential excitation source;on the other hand, around L~3.29, the ULF waves can also be excited by the outward expansion of the plasmapause owing to the decrease of the magnetospheric convection, and in the region of L-shells ~5.19–6.29, the ULF waves are also likely excited by the ion cyclotron instabilities driven by the solar wind dynamic pressure increase. 展开更多
关键词 ultralow-frequency(ULF)wave solar wind dynamic pressure(P_(sw)) magnetic field line resonance(FLR) ion cyclotron instability
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