Showing 721 - 740 results of 1,540 for search '"electromagnetism"', query time: 0.04s Refine Results
  1. 721

    Resonances in Reverse Vavilov-Cherenkov Radiation Produced by Electron Beam Passage over Periodic Interface by Gerard Granet, Petr Melezhik, Anatoliy Poyedinchuk, Seil Sautbekov, Yuriy Sirenko, Nataliya Yashina

    Published 2015-01-01
    “…For the first time, several physical peculiarities owing to these effects are considered in the conditions of possible resonant scattering of electromagnetic waves.…”
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    Article
  2. 722
  3. 723

    Design of a Printed Dipole Antenna Array for a Passive Radar System by Peter Knott

    Published 2013-01-01
    “…Isolated antenna elements and a small uniform linear antenna array were designed and optimised using computational electromagnetic methods. Several prototypes have been fabricated on conventional microwave PCB substrate material. …”
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    Article
  4. 724

    Broken Wire Detection System for PCCPs Based on Raspberry Pi and Deep Learning by SUN Xuechao, ZHANG Youyuan, ZHU Jinxiang, WANG Ping, YIN Da

    Published 2024-01-01
    “…Broken wire electromagnetic detection technology for prestressed concrete cylinder pipes (PCCPs) is an important technical means to maintain the safety of PCCP engineering. …”
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    Article
  5. 725

    Indoor wireless signal coverage and enhancement based on passive reconfigurable intelligent metasurface by Haixia LIU, Hao YI, Xiangjin MA, Shuyao YUE, Xudong KONG, Pei MA, Yuxin ZENG, Long LI

    Published 2022-12-01
    “…Reconfigurable intelligent metasurface (RIS) is a new type of artificial electromagnetic metamaterial, which can control the frequency, amplitude, phase, polarization, propagation direction and wave type of electromagnetic wave flexibly.In the field of wireless communication, RIS can be used to reconstruct the wireless communication channel to achieve blind coverage of wireless signals and improve the communication quality.First, the development and research status of RIS, the key technologies and application scenarios of RIS were summarized and analyzed.Then, a new passive RIS was proposed to realize the characteristics of the aperture reconfiguration and beam reconfiguration through passive coding and splicing principle, which had the advantages of low cost, low power consumption and low complexity.Finally, the blind area coverage enhancement experiment of indoor wireless signal based on passive reflection metasurface was carried out.The effectiveness of passive splicing metasurface in wireless communication blind coverage scenarios was proved by comparison between simulation and field measurement.In addition, for 5G/6G millimeter wave communication, the passive RIS with double-layer cross dipole elements was designed and applied to typical indoor L-shaped corridor scene to verify the enhancement effect of indoor wireless signal coverage.…”
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  6. 726
  7. 727

    Non-cooperative signal modulation recognition algorithm based on joint feature parameter extraction by Haifei SI, Xingliu HU, Zhen SHI, Shiyong LI

    Published 2020-07-01
    “…Aiming at the problem that in the current electromagnetic environment,the modulation method is complicated,the frequency-consuming equipment increases,the spectrum is congested,and the electromagnetic environment interference increases,the algorithm of OFDM signal detection and subcarrier identification in the background of non-cooperative communication were deeply studied.Using the different distribution states of OFDM signals and single carrier signals in the time domain,a joint characteristic parameter was proposed to solve the existence problem of OFDM in the received signal.For the phase shift and frequency offset problems caused by the channel transmission to the signal,by using the periodic stability the blind parameter estimation was performed to obtain the signal prior information.On the basis of the obtained signal prior information,a multi-level classification and recognition method for non-cooperative OFDM signal sub-carrier signals was proposed.Therefore,a model based on non-cooperative communication system OFDM signal detection and subcarrier modulation identification was designed,and finally modulation identification of unknown signals was completed.Simulation experiments show that in non-cooperative communication systems,OFDM signals and single-carrier signals can be accurately identified,and ideal modulation recognition effects can be achieved on empty subcarriers,QPSK,and 16QAM in the receiver OFDM signal subcarriers,overcoming the channel transmission band The problems of phase shift and frequency offset have improved the accuracy of modulation mode identification.…”
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  8. 728

    Damping Multimode Switching Control of Semiactive Suspension for Vibration Reduction in a Wheel Loader by Tao Wei, Liu Zhiqiang

    Published 2019-01-01
    “…The multimode switching damping characteristics are achieved by just changing the discrete statuses of two high-speed switch electromagnetic valves, which makes the damping adjustment simpler and more reliable. …”
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    Article
  9. 729

    General Principles of Formation and Transformation of Energy Fields of Different Nature by I. I. Gretchikhin

    Published 2006-06-01
    “…Following this representation Lorentz’s equation is validated and on the basis of it Maxwell’s equations derive as a consequence with justification of magnetic and electromagnetic fields. A brief review of the existing theories of the gravitational field origination is given in the paper.…”
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    Article
  10. 730

    Ultra‐Low Threshold Resonance Switching by Terahertz Field Enhancement‐Induced Nanobridge by Sang‐Hun Lee, Moohyuk Kim, Yeeun Roh, Myung‐Ki Kim, Minah Seo

    Published 2025-01-01
    “…In this study, ultra‐low threshold resonance mode switching by strong nonlinear carrier transport beyond the semi‐classical Boltzmann transport regime using terahertz (THz) electromagnetic waves are demonstrated, whose energy is thousands of times smaller than the bandgap. …”
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    Article
  11. 731

    Synchronization of Two Self-Synchronous Vibrating Machines on an Isolation Frame by Chunyu Zhao, Qinghua Zhao, Zhaomin Gong, Bangchun Wen

    Published 2011-01-01
    “…The condition of implementing synchronization is that the torque of frequency capture between each pair of the unbalanced rotors on a vibrating machine is greater than the absolute values of the output electromagnetic torque difference between each pair of motors, and that the torque of frequency capture between the two vibrating machines is greater than the absolute value of the output electromagnetic torque difference between the two pairs of motors on the two vibrating machines. …”
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  12. 732

    The Value of Programmable Shunt Valves for the Management of Subdural Collections in Patients with Hydrocephalus by Dimitrios Pachatouridis, George A. Alexiou, Evaggelos Mihos, George Fotakopoulos, Spyridon Voulgaris

    Published 2013-01-01
    “…The aim of the present study was to assess the value of electromagnetic programmable shunt valves for the treatment of subdural collections. …”
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    Article
  13. 733

    The SiD Digital ECal Based on Monolithic Active Pixel Sensors by Brau James E., Breidenbach Martin, Dragone Angelo, Habib Alexandre, Rota Lorenzo, Vassilev Mirella, Vernieri Caterina

    Published 2024-01-01
    “…The SiD Collaboration is developing Monolithic Active Pixel Sensor (MAPS) technology for tracking and electromagnetic calorimetry (ECal). This technology offers high granularity, thin sensors, good time resolution (<nsec), and small dead areas, enabled by gaseous cooling for tracking and passive thermal conduction for calorimetry. …”
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  14. 734

    Controlling aluminum casting from stationary furnace by E. S. Kinev, A. A. Tyapin, E. A. Golovenko, Yu. S. Avdulova

    Published 2019-03-01
    “…Evaluation of the asymmetry of the electromagnetic mode of the shortened machines for switching on the windings of six-zone inductors can be conveniently performed according to the vector diagrams of magnetic fluxes. …”
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  15. 735

    Cervical Spine Mechanism for Reproduction of the Biomechanical Behaviours of the Human Neck during Rotation-Traction Manipulation by Yuancan Huang, Shuai Li, Minshan Feng, Liguo Zhu

    Published 2017-01-01
    “…Second, a mass-spring-damper system with an electromagnetic clutch was designed to emulate the entire dynamic response of the human neck. …”
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    Article
  16. 736

    CALCULATION OF MAGNETIC CIRCUIT OF SINGLE-PHASE INDUCTION MOTOR WITH DECOMPOSED POLES by V. S. Malyar, L. Yu. Glukhivskyi, A. V. Malyar, D. P. Grechyn, R. Gavdyo

    Published 2003-06-01
    “…High level and detailed presentation of magnetic core makes it possible to determine electromagnetic parameters and investigate an influence of motor geometry on its behavior under steady state and dynamic modes.…”
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    Article
  17. 737

    Multifunctional Design Ratios for Calculating Power Losses and Energy Efficiency of Long-Distance Electricity Transmission by G. E. Pospelov, Т. G. Pospelova

    Published 2012-02-01
    “…Universality of these ratios with due account of electromagnetic wave propagation nature and intermediate connections and multifunctional application are considered in the paper. …”
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  18. 738

    Algorithm оf Computer Model Realization оf High-Frequency Processes in Switchgears Containing Non-Linear Over-Voltage Limiters by Ye. V. Dmitriev, A. M. Gashimov, N. R. Babayeva

    Published 2007-08-01
    “…Analysis of the Over-Voltage Limiter (OVL) influence on electromagnetic high-frequency over-voltages at commutations with isolators of unloaded sections of wires and possibility of application of a frequency-dependent resistor in case of necessity to facilitate OVL operation conditions is provided in the paper.It is shown that it is necessary to take into account characteristics of OVL by IEEE circuit and its modifications at computer modeling of high-frequency over-voltages.…”
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  19. 739

    Spontaneous Emission of an Excited Atom in a Dusty Unmagnetized Plasma Medium by Naser Alinejad, Noushin Pishbin

    Published 2014-01-01
    “…Calculation of the decay rate of atoms is applicable to understand the particular structure of the vacuum state of the electromagnetic field.…”
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  20. 740

    PROTOTIPE PAKAIAN ANTI RADIASI UNISEX SPORTSWEAR SMARTPHONE DENGAN PAPARAN RADIASI PLASMA PIJAR KORONA ELEKTRODA TIP- SILINDER by Valentinus Galih Vidia Putra, Annisa Diyan Fitri, Ichsan Purnama, Juliany Ningsih Mohamad

    Published 2020-04-01
    “…The result of thisresearchindicates that an anti-radiation clothe patch was succesfully shield an electromagnetic radiation from a smartphone.   Keywords: plasma discharge, unisex sportswear, tip-plane electrode, electromagnetic shielding …”
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    Article