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3rd International Conference on Energy Transition in the Mediterranean Area, SyNERGY MED 2024

作者： Charalambous, Chrysanthos Polycarpou, Alexis Efthymiou, Venizelos Georghiou, George E. University of Cyprus PV-Technology Laboratory Department of Electrical and Computer Engineering Nicosia Cyprus PHAETHON Centre of Excellence for Intelligent Efficient and Sustainable Energy Solutions Nicosia Cyprus Frederick University Department of Electrical Computer Engineering and Informatics Nicosia Cyprus

ISBN: (纸本)9798350375923

The transition to a lower-carbon energy system across Europe brings numerous opportunities and challenges, necessitating advancements in sustainable and eco-friendly energy solutions. This study examines the design and operation of distribution networks and microgrids, particularly emphasizing the integration of hybrid AC/DC distribution systems. The primary goals of this integration are to enhance overall system performance and reduce operating expenses. Utilizing DIgSILENT Power Factory software, the research simulates a microgrid at the FOSS Research Center for Sustainable Energy at the University of Cyprus, incorporating real load and PV generation data. In order to reduce the amount of energy imported from the main grid, this approach evaluates various combinations of AC and DC loads, power production units, and energy storage solutions. The results show that the most optimal structure, with 65% DC loads and 35% AC loads, maximizes efficiency as well as minimizes running expenses. The analysis highlights a notable decrease in imported energy, which dropped from 60.3 kWh/day at full AC loads to 51.6 kWh/day at the optimal DC ratio. Finally, the design and implementation of effective, sustainable energy systems that are in line with changing European energy policy and technology breakthroughs will be significantly impacted by these outcomes. © 2024 IEEE.

关键词： Energy transition

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The current pulses characteristics of the negative corona discharge in SF_(6)/CF_(4)mixtures

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Plasma Science and Technology 2023年第2期25卷 119-130页

作者：高青青王小华 Kazimierz ADAMIAK 杨爱军刘定新纽春萍张嘉伟 School of Electrical Engineering Xi'an University of TechnologyXi'an 710048People's Republic of China State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'an 710049People's Republic of China Department of Electrical and Computer Engineering Western UniversityOntario N6A5B9Canada

This paper presents the results of numerical investigation of the current pulses characteristics in SF_(6)/CF_(4)mixtures for the negative point-plane corona *** pressure and the temperature of gas mixtures are 0.4 MPa and 300 K,*** CF_(4)content varies from20%to 80%.The 2D axisymmetric geometry with point-plane electrodes is investigated,and the three drift-diffusion equations are solved to predict the characteristics of the negative corona *** addition,Poisson’s equation is coupled with the above three continuity equations to calculate the electric *** order to calculate the electron impact coefficients,including the Townsend ionization and attachment coefficients,as well as the mobilities and diffusion coefficients for electrons,the two-term Boltzmann equation is *** characteristics of three ionic species at five stages of the first current pulse in 60%SF_(6)-40%CF_(4)and20%SF_(6)-80%CF_(4)mixtures are selected to discuss the development mechanism of current ***,the reduced electric field strengths at the corresponding time instants are presented to help understand the discharge *** current waveform and the total number of three species are compared in all the cases to analyze the effects of the CF_(4)content on the *** reduced electric field strength is also helpful in understanding the effects of CF_(4)*** the CF_(4)content increases to 80%,the discharge is more intensive and the pulse frequency also increases.

关键词： SF_(6)/CF_(4)mixtures negative corona discharge current pulses

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Tunable VO_(2) cavity enables multispectral manipulation from visible to microwave frequencies

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Light(Science & Applications) 2024年第3期13卷 510-518页

作者： Hang Wei Jinxin Gu Tao Zhao Zhiyuan Yan He-Xiu Xu Shuliang Dou Cheng-Wei Qiu Yao Li Center for Composite Materials and Structure Harbin Institute of TechnologyHarbin 150001China National University of Singapore Department of Electrical&Computer EngineeringSingapore 117583Singapore School of Chemical Engineering and Technology Harbin Institute of TechnologyHarbin 150001China Suzhou Laboratory Suzhou 215123China

Optical materials capable of dynamically manipulating electromagnetic waves are an emerging field in memories,optical modulators,and thermal ***,their multispectral design preliminarily attracts much attention,aiming to enhance their efficiency and integration of ***,the multispectral manipulation based on these materials is challenging due to their ubiquitous wavelength dependence restricting their capacity to narrow *** this article,we cascade multiple tunable optical cavities with selective-transparent layers,enabling a universal approach to overcoming wavelength dependence and establishing a multispectral platform with highly integrated *** on it,we demonstrate the multispectral(ranging from 400 nm to 3 cm),fast response speed(0.9 s),and reversible manipulation based on a typical phase change material,vanadium *** platform involves tandem VO_(2)-based Fabry–Pérot(F-P)cavities enabling the customization of optical responses at target bands *** can achieve broadband color-changing capacity in the visible region(a shift of~60 nm in resonant wavelength)and is capable of freely switching between three typical optical models(transmittance,reflectance,and absorptance)in the infrared to microwave regions with drastic amplitude tunability exceeding *** work represents a state-of-art advance in multispectral optics and material science,providing a critical approach for expanding the multispectral manipulation ability of optical systems.

关键词： spectral microwave visible

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Dephasing in Fluxonium Qubits from Coherent Quantum Phase Slips

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PRX Quantum 2024年第3期5卷 030341页

作者： Mallika T. Randeria Thomas M. Hazard Agustin Di Paolo Kate Azar Max Hays Leon Ding Junyoung An Michael Gingras Bethany M. Niedzielski Hannah Stickler Jeffrey A. Grover Jonilyn L. Yoder Mollie E. Schwartz William D. Oliver Kyle Serniak Research Laboratory of Electronics Department of Physics Department of Electrical Engineering and Computer Science

Phase slips occur across all Josephson junctions (JJs) at a rate that increases with the impedance of the junction. In superconducting qubits composed of JJ-array superinductors—such as fluxonium—phase slips in the array can lead to decoherence. In particular, phase-slip processes at the individual array junctions can coherently interfere, each with an Aharonov-Casher phase that depends on the offset charges of the array islands. These coherent quantum phase slips (CQPS) perturbatively modify the qubit frequency, and therefore charge noise on the array islands will lead to dephasing. By varying the impedance of the array junctions, we design a set of fluxonium qubits in which the expected phase-slip rate within the JJ array changes by several orders of magnitude. We characterize the coherence times of these qubits and demonstrate that the scaling of CQPS-induced dephasing rates agrees with our theoretical model. Furthermore, we perform noise spectroscopy of two qubits in regimes dominated by either CQPS or flux noise. We find that the noise power spectrum associated with CQPS dephasing appears to be featureless at low frequencies and not 1/f. Numerical simulations indicate that this behavior is consistent with charge noise generated by charge-parity fluctuations within the array. Our findings broadly inform JJ-array-design trade-offs, relevant for the numerous superconducting-qubit designs employing JJ-array superinductors.

关键词： Noise Phase slips Superconductivity Josephson junctions Qubits Superconducting qubits Microwave techniques

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LMP-GAN: Out-Of-Distribution Detection For Non-Control Data Malware Attacks

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IEEE Transactions on Pattern Analysis and Machine Intelligence 2025年第07期47卷 5434-5444页

作者： Wood, David Kapp, David Kebede, Temesgen Hirakawa, Keigo Applied Research Solutions Dayton OH USA US Air Force Research Laboratory Wright Patterson Air Force Base USA Department of Electrical and Computer Engineering University of Dayton Dayton OH USA

Anomaly detection is a common application of machine learning. Out-of-distribution (OOD) detection in particular is a semi-supervised anomaly detection technique where the detection method is trained only on the inlier (in-distribution) samples - unlike the fully supervised variant, the distribution of the outlier samples are never explicitly modeled in OOD detection tasks. In this work, we design a novel GAN-based OOD detection network specifically designed to protect a cyber-physical signal systems from novel Trojan malware called non-control data (NCD) attack that evades conventional malware detection techniques. Inspired in part by the classical locally most powerful (LMP) test in statistical inferences, the proposed LMP-GAN trains the OOD detector (discriminator) by generating OOD samples that are aimed at making maximal alteration to the inlier samples while evading detection. We experimentally compare the results to the state-of-the-art anomaly detection methods to demonstrate the benefits and the appropriateness of the LMP-GAN OOD detector. © 2025 IEEE.

关键词： Malware

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Improved resolution in 3D structured illumination microscopy using a 3D-based U-Net

Improved resolution in 3D structured illumination microscopy...

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2023 Imaging Systems and Applications, IS 2023 in Optica Imaging Congress - Part of Imaging and Applied Optics Congress 2023

作者： Kebede, Bereket E. Preza, Chrysanthe Computational Imaging Research Laboratory Department of Electrical and Computer Engineering The University of Memphis United States

ISBN: (纸本)9781957171289

Recent developments using deep learning (DL) super-resolution in structured-illumination microscopy (SIM) have improved speed in two-dimensional (2D) image restoration and minimized the impact of noise. We explore extending this 2D DL technique to 3D by augmenting the 2D-convolutional layers to 3D in a U-Net DL network. We demonstrate experimentally that this extension improves lateral and axial resolution in the final 3D restoration compared to the resolution achieved by axially stacking the outputs of the 2D U-Net. © 2023 The Author(s).

关键词： Image reconstruction

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Noise Coil For Improving Sensitivity in a Fully Passive Bio-Magnetic Signal Detection System

Noise Coil For Improving Sensitivity in a Fully Passive Bio-...

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2023 International Applied Computational Electromagnetics Society Symposium, ACES-Monterey 2023

作者： Zhu, Keren Kiourti, Asimina The Ohio State University ElectroScience Laboratory Department of Electrical and Computer Engineering Columbus United States

ISBN: (纸本)9781733509633

Human emitted bio-magnetic signals are beneficial for several healthcare applications, yet they are difficult to capture due to their low magnitude. Overcoming limitations in the state-of-the-art, we previously reported a sensing system that can capture these signals in a non-contact, non-shielded, and low-cost manner. In this work, we take a major step further and demonstrate a noise coil subtraction scheme that successfully increases the sensitivity of the system. In vitro experimental results confirm that a reduced number of notch filters (10 vs. 13) are required to retrieve an 8.76 pT, 100-1000 Hz emulated evoked compound action potential (eCAP) signal with 30 minutes of averaging time when using the noise coil subtraction scheme. In the future, more advanced Digital Signal Processing (DSP) can be applied to adjust the level of noise for subtraction and further boost the sensitivity. © 2023 ACES.

关键词： Notch filters

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2D Skeleton-Based Keypoint Generation Method for Grasping Objects with Roughly Uniform Height Variation 11

2D Skeleton-Based Keypoint Generation Method for Grasping Ob...

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11th RSI International Conference on Robotics and Mechatronics, ICRoM 2023

作者： Sabzejou, Ali Masouleh, Mehdi Tale Kalhor, Ahmad University of Tehran Human and Robot Interaction Laboratory School of Electrical and Computer Engineering Department Iran

ISBN: (纸本)9798350308105

Robotic grasping poses a fundamental challenge in robotics, particularly when dealing with unknown objects. This skill has always been a focal point in robotics research due to its fundamental importance and inherent complexity. Recent advances utilize state-of-The-Art learning techniques, including deep learning and deep reinforcement learning, presenting their unique set of challenges. Training these models requires extensive data and computational resources, with the generalization to unknown objects presenting a significant obstacle for robots. This paper presents a comprehensive approach to unknown object robotic grasping, with a specific focus on top-down grasping actions. The process encompasses image preprocessing, the application of the Straight Skeleton (StSkel) method, and the systematic generation of grasp keypoints when applied to a selection of objects from the Dex-Net dataset. During the evaluation, the analysis incorporated crucial metrics, including the number of detected grasp keypoints for each object, the count of successfully generated grasp pairs, the overall success rate, and the success rate when considering the top 5 ranked grasp pairs. One of the notable strengths of this approach lies in its adaptability to a wide array of objects, ranging from simple shapes to complex ones. The proposed approach in this paper paves the way for automatically labeling grasping datasets, providing a valuable asset for developing auto-generating Deep-RL models. The StSkel method effectively captures essential structural information, making it suitable for real-world applications involving diverse objects. The experimental outcomes affirm the robustness and adaptability of the approach, as it most often achieved a high success rate in generating viable pairs of grasping points for most tested objects. Even complex objects yield impressive results, demonstrating the method's potential for real-world applications in grasping unknown objects. © 2023 IEEE.

关键词： Robotics

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In Vitro Validation of Partial Shielding to Detect an Extremely Weak and Wideband Bio-Magnetic Signal

In Vitro Validation of Partial Shielding to Detect an Extrem...

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2023 International Applied Computational Electromagnetics Society Symposium, ACES-Monterey 2023

作者： Zhu, Keren Kiourti, Asimina The Ohio State University ElectroScience Laboratory Department of Electrical and Computer Engineering Columbus United States

ISBN: (纸本)9781733509633

We have recently reported an induction coil-based system that can detect naturally emanated magnetic fields from the human body in unshielded environments. Previously, we demonstrated in simulation that, with the addition of a partial iron box shielding, the noise at the recording site can be significantly reduced. In this work, we take a step further and validate in vitro that such partial shielding can indeed effectively increase the sensitivity of our system and reduce the extent of digital signal processing (DSP) required. Indeed, in vitro experimental results show that, with partial shielding, less averaging time (24 minutes vs. 30 minutes), and a smaller number of notch filters (7 vs. 10) can retrieve a wideband (100-1000Hz), low strength (8.76 pT) bio-magnetic signal with even higher clarity level. Results shown here can expand the clinical applicability of our bio-magnetic sensing system such that higher quality signals can be detected with less extensive DSP. © 2023 ACES.

关键词： Notch filters

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Dynamic 2D Array of Higher Order Bessel Beams Integrated in Time (HOBBIT)

Dynamic 2D Array of Higher Order Bessel Beams Integrated in ...

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Frontiers in Optics + Laser Science 2023, FiO, LS 203: Part of Frontiers in Optics + Laser Science 2023

作者： Cramer, Tyler Holsenback, Vincent Free, Justin Miller, J. Keith Johnson, Eric G. Micro-Photonics Laboratory The Holcombe Department of Electrical and Computer Engineering Clemson University United States

This paper presents a scheme for the realization of a dynamic 2D array of Higher Order Bessel Beams Integrated in Time (HOBBIT). Results are presented for time varying changes in OAM and their corresponding propagatio... 详细信息

ISBN: (纸本)9781957171296

关键词： Doppler effect Gaussian beams Optical vortices Orbital angular momentum multiplexing Phase shift Structured light

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