Spectrum prediction algorithm in ISM band based on two-dimensional LMBP neural network by Xiaoyu WAN, Pan HU, Zhengqiang WANG

“…With the rapid development and application of short-range wireless communications technology，the electromagnetic interference of ISM（2.4 GHz）band has become more apparent.Using the spectral prediction algorithm to predict the information of spectrum occupancy has become an effective way to solve the problem of compatible coexistence between devices.On the basis of verifying the time-domain and frequency-domain correlation of ISM band，an LMBP neural network of time and frequency domain was proposed and applied in the spectral prediction of ISM band.Through simulations and theoretical analysis，the best training combination of time-frequency point （△t=5，△f=2）was obtained.This point improves 95% of the spectrum prediction accuracy under the conditions of the input vector N=9 of the neural network.It increased 9% and 4% prediction accuracy compared with Markov algorithm and time-domain LMBP neural network and it had a better convergence time of training.…”
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Uniqueness and Asymptotic Behavior of Positive Solutions for a Fractional-Order Integral Boundary Value Problem by Min Jia, Xin Liu, Xuemai Gu

“…We study a model arising from porous media, electromagnetic, and signal processing of wireless communication system -𝒟tαx(t)=f(t,x(t),x'(t),x”(t),…,x(n-2)(t)),  0<t<1,   x(0)=x'(0)=⋯=x(n-2)(0)=0,   x(n-2)(1)=∫01x(n-2)(s)dA(s), where n-1<α≤n,   n∈ℕ and n≥2, 𝒟tα is the standard Riemann-Liouville derivative, ∫01x(s)dA(s) is linear functionals given by Riemann-Stieltjes integrals, A is a function of bounded variation, and dA can be a changing-sign measure. …”
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Unveiling the nature of cathodoluminescence from photon statistics by Sotatsu Yanagimoto, Naoki Yamamoto, Tatsuro Yuge, Takumi Sannomiya, Keiichirou Akiba

“…Using this approach, we experimentally unveiled the statistical differences of coherent CL involving a single electromagnetic interaction process and incoherent CL involving multiple excitation processes. …”
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Implementation of CSMA/CA-Based MAC Protocol for Optical Camera Communication by Muhammad Miftah Faridh, Herfandi Herfandi, Ones Sanjerico Sitanggang, Muhammad Rangga Aziz Nasution, Huy Nguyen, Yeong Min Jang

“…This technology offers benefits such as a broad spectrum, low cost, high efficiency, and resistance to electromagnetic interference. However, OCC faces challenges in medium access management, which necessitates the development of effective medium access control (MAC) protocols. …”
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Multi-node cooperation based robust visible light intelligent positioning by Sicong LIU, Danping SU, Tiankuo WEI, Xianyao WANG

“…Visible light communication is expected to be one of the key alternative technologies for 6G with the advantages of abundant spectrum resources, less susceptibility to electromagnetic pollution and green safety, which also provides a new idea for high-precision indoor positioning.However, the positioning accuracy can be significantly degraded in the harsh indoor environment where LED that can be used as an anchor is insufficient or severely blocked.Therefore, a robust visible light intelligent positioning method based on multi-node cooperation was investigated.Considering the non-line-of-sight propagation of visible light and the dynamic change of user terminal orientation, a cooperative localization mechanism between user terminals was established to obtain mutual information gain and a convolutional-recurrent neural network was designed, and the theoretical analysis of cooperative localization accuracy performance was carried out.Simulation results show that the introduction of the cooperative localization mechanism can effectively improve positioning performance under harsh conditions.…”
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Metasurface spatial filters for multiple harmonic signals by Kim Daeik, Nguyen Mai Anh, Byun Gangil, Lee Jongwon

“…Nonlinear frequency mixings have shown an alternative way to create new electromagnetic sources in frequency ranges that are difficult to access with conventional techniques. …”
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Identification of Gamma-Ray Point Sources in Fermi-LAT Data with Minimum Spanning Tree Algorithm by Mehran Soor, Fatemeh Akhondi, Hadi Hedayati

“…Gamma rays are the most energetic photons in the electromagnetic spectrum, detected with ground-based and space-based detectors in different energy ranges from sources in our galaxy and beyond. …”
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Extracting the dependence of directed flow differences on conserved charges by Lin Zi-Wei, Nayak Kishora, Shi Shusu

“…A nonzero directed flow difference △v1 has been proposed as a consequence of the electromagnetic field produced in relativistic heavy ion collisions. …”
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Reevaluating the necessity of static shift correction in magnetotelluric inversion by Jingzhong Zeng, Jingzhong Zeng, Xiaobin Chen, Xiaobin Chen, Peijie Wang, Zhongyin Liu, Zhongyin Liu, Juntao Cai, Juntao Cai

“…Magnetotelluric (MT) is a significant electromagnetic exploration method. However, due to uneven distribution of surface charges and other factors, static shift often affects observed data, reducing the accuracy of inversion and interpretation. …”
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Polarization of thermal dilepton radiation by Florian Seck, Bengt Friman, Tetyana Galatyuk, Hendrik van Hees, Ralf Rapp, Enrico Speranza, Jochen Wambach

“…Using a realistic model for the in-medium electromagnetic spectral function, we predict polarization observables and compare them to experiment. …”
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Synchronization of Two Non-Identical Coupled Exciters in a Non-Resonant Vibrating System of Linear Motion. Part I: Theoretical Analysis by Chunyu Zhao, Hongtao Zhu, Ruizi Wang, Bangchun Wen

“…In this paper an analytical approach is proposed to study the feature of frequency capture of two non-identical coupled exciters in a non-resonant vibrating system. The electromagnetic torque of an induction motor in the quasi-steady-state operation is derived. …”
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Non-linear PID control of AC current and DC voltage for a photovoltaic system operating on a microgrid by Pablo Proaño, Marcelo Pozo, Carlos Gallardo, Oscar Camacho

“…This adaptive behavior eliminates the need for a derivative component, effectively circumventing challenges posed by electromagnetic noise and rapid system dynamics. A comparative analysis between the proposed nonlinear PI controller and a conventional PI controller is conducted within a photovoltaic microgrid framework. …”
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Numerical Simulation and Active Protection of Lightning Discharge Based on Quantum Heuristic Evolutionary Algorithm by Mingfa Wu, Yufeng Qian, Chongjing Yang

“…Due to its physical influences such as strong current, high temperature, strong shock waves, and strong electromagnetic radiation, it has a huge destructive effect instantly, which may bring serious threats to people’s lives and property safety. …”
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Towards a new era of 2D materials-based multifunctional composite films: From innovation to evolution by Muhammad Yasir Khalid, Rehan Umer

“…Moreover, the integrated functions of the 2D materials-based multifunctional composite films such as sensing and actuation behaviour, thermal conductivity, and electromagnetic interference (EMI) shielding effectiveness are explored and their mechanisms for superior performance are elucidated. …”
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Stellarator fusion systems enabled by arrays of planar coils by D.A. Gates, S. Aslam, B. Berzin, P. Bonofiglo, A. Cote, D.W. Dudt, E. Flom, D. Fort, A. Koen, T.G. Kruger, S.T.A. Kumar, M.F. Martin, A. Ottaviano, S. Pasmann, P.K. Romano, C.P.S. Swanson, L. Tang, E. Winkler, R. Wu

“…We present an overview of a novel electromagnetic coil configuration for stellarators and its application to two near-term fusion systems. …”
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GPR in Damage Identification of Concrete Elements—A Case Study of Diagnostics in a Prestressed Bridge by Piotr Łaziński, Marcin Jasiński, Mateusz Uściłowski, Dawid Piotrowski, Łukasz Ortyl

“…Utilizing high-frequency electromagnetic waves, GPR accurately detects and maps anomalies within hardened concrete, enabling precise identification of defect locations and their dimensions. …”
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Research Progress in Environmental Response of Fiber Concrete and Its Functional Mechanisms by Yanxuan Ma, Xia Yu, Fei Zhao, Jin Liu, Pengfei Zhu, Peng Zhang, Jian Zhang, Lei Wu

“…The response fields include the stress field, temperature field, electromagnetic field, chemical field, and humidity field, among which the field response mechanism of smart NFRC is classified and summarized. …”
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EMT Model Validation Throughout the Life Cycle of Wind Power Plants Based on Type IV Turbines: Experiences and Recommendations by Gabriel Miguel Gomes Guerreiro, Ranjan Sharma, Pankaj Kumar, Sulav Ghimire, Frank Martin, Pramod Ghimire, Guangya Yang

“…The validation of Electromagnetic Transients (EMT) models is essential for ensuring the accuracy of grid compliance and stability studies. …”
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Micro-Doppler Ambiguity Resolution Based on Short-Time Compressed Sensing by Jing-bo Zhuang, Zhen-miao Deng, Yi-shan Ye, Yi-xiong Zhang, Yan-yong Chen

“…The proposed algorithm is verified using the echo signals generated according to the theoretical model and the signals with micro-Doppler signature produced using the commercial electromagnetic simulation software FEKO.…”
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Extraction of Weak Scatterer Features Based on Multipath Exploitation in Radar Imagery by Muhannad Almutiry, Lorenzo Lo Monte, Michael C. Wicks

“…The proposed solution is to suppress the dominant scatterer by modeling its electromagnetic effects as a secondary source or “extra dependent transmitter” in the measurement domain. …”
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