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3rd IEEE International Conference on Control, Instrumentation, Energy and Communication, CIEC 2024

作者： Bhattacharjee, Dipanwita Chakraborty, Sourav Karmakar, Binoy Kumar Institute of Engineering & Managementt Department of Electrical Engineering Kolkata India Hitachi Energy Limited Department of Power Consulting Kolkata India University of Calcutta Department of Applied Physics Kolkata India

ISBN: (纸本)9798350313703

Rooftop solar photovoltaic (PV) installations play a crucial role in advancing PV penetration within distribution systems. Solar plants on rooftops, particularly those without energy storage, emerge as a cost-effective alternative when compared to conventional fossil fuel-based generation. However, as the proportion of solar PV within a distribution system increases, concerns about voltage swelling arise, especially under lightly loaded conditions. This issue becomes more pronounced in underground cable-based distribution systems due to their high R/X ratio, potentially leading to the curtailment of solar PV *** this work, we developed an IEEE 33-bus distribution system in MATLAB to assess the maximum allowable rooftop PV penetration without violating voltage limits. The same IEEE 33-bus network was then modified into a cable-based distribution system to investigate voltage swelling effects. In a comparative analysis between cable-based and overhead-based IEEE 33 bus systems, we found that the maximum allowable rooftop PV penetration is lower in cable-based networks. Simulation results suggest that blindly increasing rooftop PV penetration in a metropolitan cable-based system may lead to voltage instability. Careful planning is essential to ensure the sustainable integration of PV systems without compromising network stability. © 2024 IEEE.

关键词： Cables

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Enhancing in-field performance of GdBCO coated conductors by cooperative irradiation with Ti ions and protons

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Superconductivity 2024年第3期11卷 45-50页

作者： Daxing Huang Hao Dong Tongxin Wang Hao Yu Kaigui Zhu Hongwei Gu Fazhu Ding Key Laboratory of Applied Superconductivity and Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Department of Physics Beihang UniversityBeijing 100191China

Irradiation can accurately manipulate defects and adjust pinning landscapes within REBa_(2)Cu_(3)O_(7-δ) (REBCO, RE: rare earths) coated conductors (CCs). This study reports a productive method to dramatically boost the in-field critical current density (J_(c) ) for GdBCO CCs using cooperative irradiation with Ti ions and protons. Remarkably, the in-field J_(c) of commercial CCs can be almost doubled at a wide range of temperatures and magnetic fields. Defects of various sizes induced by cooperative irradiation are more uniform distribution through the entire GdBCO film to improve the vortex pinning characteristics, thereby enhancing the in-field performance of the GdBCO CC. This method highlights how combining different particle irradiation types can tailor defect size and distribution, optimizing pinning landscapes for commercial REBCO CCs.

关键词： REBCO Ti-ion irradiation Vortex pinning In-field performance

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Magnetic‑free chiral eigenmode spectroscopy for simultaneous sensitive measurement of optical rotary dispersion and circular dichroism

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eLight 2024年第1期4卷 160-171页

作者： Wenpeng Zhou Ya‑Ping Ruan Haodong Wu Han Zhang Jiang‑Shan Tang Zhenda Xie Lei Tang Yu Wang Yue-E Ji Kunpeng Jia Cheng‑Wei Qiu Yan‑Qing Lu Keyu Xia College of Engineering and Applied Sciences Nanjing UniversityNanjing 210023China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210023China School of Physics Nanjing UniversityNanjing 210023China School of Electronic Science and Engineering Nanjing UniversityNanjing 210023China Department of Electrical and Computer Engineering Engineering Drive 3National University of SingaporeSingapore 117583Singapore Hefei National Laboratory Hefei 230088China

Chirality,defined by Lord Kelvin,refers to the geometric symmetry property of an object that cannot be superposed onto its mirror image using rotations and *** material’s chirality can be probed with light as the optical activity:optical rotary dispersion(ORD)and circular dichroism(CD).It is still challenging to yield extremely sensitive ORD and CD for very weak chirality and measure both *** ringdown polarimetry has been reported to improve ORD detection sensitivity with the absence of equally important CD signature,at the price of high cavity finesse near 400,frequency-locking sophistication,and large magnetic ***,we report a unique recipe to demonstrate the simultaneous measurement of ORD and the CD by separately observing the chiral eigenmode spectra from a bowtie optical cavity with a finesse about 30,without resorting to frequency locking or magnetic *** obtain a sensitivity of2.7×10^(−3)deg/√Hz for ORD,8.1×10^(−6)/√Hz for CD,and a spectral resolution of 0.04 pm within a millisecond-scale *** present a cost-effective yet ultrasensitive account for chiral chromatography,the conformational dynamics and chiroptical analysis of biological samples which particularly exhibit weak and narrow spectral signals.

关键词： Chiral material Optical rotary dispersion Circular dichroism Cavity-enhanced chiral eigenmode spectroscopy

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Fully relativistic many-body perturbation energies,transition properties,and lifetimes of lithium-like iron Fe XXIV

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Chinese physics B 2023年第10期32卷 90-99页

作者：李双赵敏刘国庆胡昌宝潘国柱 School of Electrical and Opto-electronic Engineering West Anhui UniversityLu'an 237012China College of Mechanical and Electronic Engineering Fujian Agriculture and Forestry UniversityFuzhou 350002China Institute of Applied Physics and Computational Mathematics Beijing 100088China Shanghai EBIT Laboratory Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghai 200433China

Employing the advanced relativistic configuration interaction(RCI)combined with the many-body perturbation theory(RMBPT)method,we report energies and lifetime values for the lowest 35 energy levels from the(1s^(2))nl configurations(where the principal quantum number n=2–6 and the angular quantum number l=0,...,n-1)of lithium-like iron Fe XXIV,as well as complete data on the transition wavelengths,radiative rates,absorption oscillator strengths,and line strengths between the *** the allowed(E1)and forbidden(magnetic dipole M1,magnetic quadrupole M2,and electric quadrupole E2)ones are *** detailed comparisons with previous results,we assess the overall accuracies of present RMBPT results to be likely the most precise ones to *** interaction effects are found to be very important for the energies and radiative properties for the *** present RMBPT results are valuable for spectral line identification,plasma modeling,and diagnosing.

关键词： relativistic many-body perturbation multi-reference configuration radiative rates lifetime

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Self-Powered Flexible Micro-Supercapacitor based on Optimized Laser Induced Graphene Electrodes for Sustainable Energy Harvesting and Storage 38

Self-Powered Flexible Micro-Supercapacitor based on Optimize...

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38th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2025

作者： Beigh, Faizan T. Singh, Vishal Singh, Bharti Mallick, Dhiman Indian Institute of Technology Delhi Department of Electrical Engineering New Delhi India Delhi Technological University Department of Applied Physics New Delhi India

ISBN: (纸本)9798331508890

The present paper reports a single-step fabricated laser induced graphene (LIG) based interdigitated electrodes (IDE) with exceptionally low sheet resistance (5Ωsq1) for energy storage and harvesting, essential for flexible wearable devices. By optimizing LIG parameters we obtain doping-free fabrication of IDEs for Micro-supercapacitors (MSCs). Unlike conventional designs, the proposed MSCs feature self-charging capabilities using piezoelectric Polyvinylidene fluoride (PVDF) as separator and Polyvinyl Alcohol (PVA)/KOH as gel electrolyte. The LIG based self-powered MSC demonstrates an areal capacitance (CAr) of ~18mF/cm2 at 10mV/s, good cyclability (~85% retention) after 5,000 cycles, a series resistance (RSI) of 150.8Ω, and a charge transfer resistance (RCT) of ~1600 Ω, all achieved through a simple, scalable, and sustainable process. © 2025 IEEE.

关键词： Energy harvesting

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Dzyaloshinskii-Moriya-type spin-spin interaction from mixed-parity superconductivity

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Physical Review B 2025年第6期111卷 L060504-L060504页

作者： Jabir Ali Ouassou Takehito Yokoyama Jacob Linder Department of Computer Science Electrical Engineering and Mathematical Sciences Western Norway University of Applied Sciences NO-5528 Haugesund Norway Department of Physics Tokyo Institute of Technology Meguro Tokyo 152-8551 Japan Center for Quantum Spintronics Department of Physics Norwegian University of Science and Technology NO-7491 Trondheim Norway

Interacting impurity spins adsorbed on surfaces have been suggested as basic components for applications in quantum computation and spintronics. Such spins usually prefer a parallel or antiparallel configuration, but weakly noncollinear alignments are possible due to the Dzyaloshinskii-Moriya interaction (DMI) that arises in the presence of relativistic spin-orbit coupling. Here, we show that an effective Dzyaloshinskii-Moriya-type interaction (DMTI) can emerge purely from superconducting correlations without any spin-orbit interaction. We give an analytical proof and provide a numerical study which shows that DMTI arises in mixed-parity superconductors solely from the superconducting pairing. Moreover, we show that the same effect can be realized in Josephson junctions between s-wave and p-wave superconductors, where a phase bias toggles the DMTI entirely on and off. These results enable a way to engineer spin textures using superconducting order.

关键词： Shear waves

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A metamaterial-free fluid-flow cloak

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National Science Review 2022年第9期9卷 212-218页

作者： Fuyang Tay Youming Zhang Hongyi Xu Honghui Goh Yu Luo Baile Zhang Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University School of Electrical and Electronic Engineering Nanyang Technological University Centre for Disruptive Photonic Technologies Nanyang Technological University

The model of ide al fluid flow around a cylindrical obstacle exhibits a long-established physical picture,where originally straight streamlines are deflected over the whole space by the *** by transformation optics and metamaterials,recent theories have proposed the concept of fluid cloaking,which is able to recover the straight streamlines,as if the obstacle did not ***,such a cloak,similar to all previous transformation-optics-based devices,relies on complex metamaterials with inhomogeneous parameters and is difficult to *** we deploy the theory of scattering cancellation and report on the experimental realization of a fluid-flow cloak without *** clo ak is realized by engineering the geometry of the fluid channel,which effectively cancels the dipole-like scattering of the *** clo aking effect is demonstrated through the direct observation of recovered straight streamlines in the fluid *** work sheds new light on conventional fluid control and may find application in microfluidic devices.

关键词： invisibility cloaks metamaterials fluid-flow control

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Fully relativistic energies,transition properties,and lifetimes of lithium-like germanium

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Chinese physics B 2024年第10期33卷 52-61页

作者： Shuang Li Jing Zhou Liu-Hong Zhu Xiu-Fei Mei Jun Yan School of Electrical and Optoelectronic Engineering West Anhui UniversityLu’an 237012China Institute of Applied Physics and Computational Mathematics Beijing 100088China Shanghai EBIT Laboratory Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghai 200433China

Employing two fully relativistic methods,the multi-reference configuration Dirac-Hartree-Fock(MCDHF)methodand the relativistic many-body perturbation theory(RMBPT)method,we report energies and lifetime values for the lowest35 energy levels of the(1s^(2))nl configurations(where the principal quantum number n=2-6 and the angular quantum numberl=0,...,n-1)of lithium-like germanium(Ge XXX),as well as complete data on the transition wavelengths,radiativerates,absorption oscillator strengths,and line strengths between the *** the allowed(E1)and forbidden(magneticdipole M1,magnetic quadrupole M2,and electric quadrupole E2)ones are *** results from the two methodsare consistent with each other and align well with previous accurate experimental and theoretical *** assess theoverall accuracies of present RMBPT results to be likely the most precise ones to *** present fully relativistic resultsshould be helpful for soft x-ray laser research,spectral line identification,plasma modeling and *** datasetspresented in this paper are openly available at https://***/10.57760/sciencedb.j00113.00135.

关键词： multi-reference Dirac-Hartree-Fock relativistic many-body perturbation radiative rate lifetime

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Detection and Classification of Pulsed Doppler Radar Signals Using Deep Learning 1

Detection and Classification of Pulsed Doppler Radar Signals...

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1st International Conference on Global Aeronautical engineering and Satellite Technology, GAST 2024

作者： Grover, Suhani Gupta, Sujal Mandpura, Anup Delhi Technological University Department of Applied Physics New Delhi India Delhi Technological University Department of Electrical Engineering New Delhi India

ISBN: (纸本)9798350371598

Pulsed Doppler radars are commonly used in military applications, especially in aircraft and missile systems, as they are able to detect and track fast-moving targets, such as enemy aircraft, while filtering out ground clutter and slower-moving objects. Classification of modulation types in airborne radar signals is essential for ensuring efficient and reliable communication, target identification, and interference rejection. This research paper presents a comprehensive study on modulation classification techniques for radar signals on an airborne module. The transmitter identity message signal is coded with pseudo-random noise codes and modulated using five modulations, namely, BASK, BFSK, BPSK, QAM and QPSK. Additionally, it is also subjected to Additive White Gaussian Noise(AWGN) and Rayleigh distribution for multipath fading in wireless transmission environments. The paper proposes a modulation recognition scheme based on multi-class classification, hierarchical feature extraction using a convolutional neural network (CNN) and residual neural network (ResNet50) architecture. The simulated result indicates that the proposed method demonstrates adaptability to modulational recognition even in low Signal-to-Noise Ratio (SNR) environments. © 2024 IEEE.

关键词： Signal detection

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Ion-focused propagation of a relativistic electron beam in the self-generated plasma in atmosphere

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Chinese physics B 2022年第6期31卷 334-341页

作者： Jian-Hong Hao Bi-Xi Xue Qiang Zhao Fang Zhang Jie-Qing Fan Zhi-Wei Dong School of Electrical and Electronic Engineering Department North China Electric Power UniversityBeijing 102206China Institute of Applied Physics and Computational Mathematics Beijing 100094 China

It is known that ion-focused regime(IFR)can effectively suppress expansion of a relativistic electron beam(REB).Using the particle-in-cell Monte Carlo collision(PIC-MCC)method,we numerically investigate the propagation of an REB in neutral *** results demonstrate that the beam body is charge neutralization and a stable IFR can be *** a result,the beam transverse dimensions and longitudinal velocities keep close to the initial *** also calculate the charge and current neutralization factors of the *** with envelope equations,we obtain the variations of beam envelopes,which agree well with the PIC ***,both the energy loss and instabilities of the REB may lead to a low transport efficiency during long-range *** is proved that decreasing the initial pulse length of the REB can avoid the influence of electron *** parts of REB pulses to build a long-distance IFR in advance can improve the beam quality of subsequent ***,a long-distance IFR may contribute to the implementation of long-range propagation of the REB in space environment.

关键词： ion-focused regime(IFR) charge neutralization electron avalanche relativistic electron beam(REB) particle-in-cell Monte Carlo collision(PIC-MCC)

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