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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 naturally emitted bio-magnetic signal can aid diagnosis of various health conditions. Improving upon our previously developed bio-magnetic sensing system, in this work, we investigate the effectiveness of an added partial shielding in terms of the ability to reduce noise at targeted recording site through CST simulation. Simulation results confirm that with partial shielding, the noise is significantly reduced at the recording site/plane while not attenuating the original bio-magnetic signal, regardless of the noise field level. In the future, in vitro experiment can be carried out to further validate the shielding performance. © 2023 ACES.

关键词： Signal detection

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State Definition in Deep Reinforcement Learning: A Smoothness Index Approach 11

State Definition in Deep Reinforcement Learning: A Smoothnes...

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

作者： Dehdasthian, Soroosh Kalhor, Ahmad Masouleh, Mehdi Tale University of Tehran Human and Robot Intraction Laboratory School of Electrical and Computer Engineering Department Iran

ISBN: (纸本)9798350308105

In the pursuit of developing autonomous agents capable of learning optimal behaviors, reinforcement learning has emerged as a foundational frame-work. This paper introduces a novel approach for state definition in deep reinforcement learning systems, with a focus on solving pixel-based control scenarios. The proposed frame-work harnesses the capabilities of Convolutional Variational Auto-Encoders to extract compact and meaningful latent representations from high-dimensional pixel observations. These representations serve as the foundation for constructing an efficient state space for reinforcement learning agents. To further enhance the state construction process, the concept of the Smoothness Index is introduced. Smoothness index acts as a criterion for feature selection within the latent space, facilitating the identification of the most relevant and informative states. Demonstrating the effectiveness of iterative smoothness index-based forward selection, this process notably compresses the observation space while retaining essential information. This compression enables the creation of more efficient reinforcement learning agents. The procedure involves collecting and preprocessing observation data given by the OpenAI Gym car racing environment, encoding observations using a convolutional variational auto-encoder, and iteratively selecting features based on smoothness index. Subsequently, the Proximal Policy Optimization algorithm is employed as a policy-based controller to evaluate the effectiveness of the proposed frame-work. Results indicate that this approach yields a remarkably compact state space that either maintains or enhances reinforcement learning agent performance. This innovative frame-work paves the way for the development of more efficient and adaptive reinforcement learning agents in real-world image-based applications. © 2023 IEEE.

关键词： Reinforcement learning

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A 146 GHz Low Noise Amplifier with 19.65 dB Gain Using YZ-Embedding Gain Boosting Technique in 22-nm FDSOI Technology 23

A 146 GHz Low Noise Amplifier with 19.65 dB Gain Using YZ-Em...

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23rd International Symposium on Communications and Information Technologies, ISCIT 2024

作者： Tugahan, Johnny R. Hora, Jefferson A. Zhu, Xi Mindanao State University Iligan Institute of Technology Microelectronics Laboratory Department of Electrical Engineering and Technology Iligan City Philippines University of Technology SydneyNSW Australia

ISBN: (纸本)9798350353952

This study introduces a differential D-Band Low Noise Amplifier (LNA) with a unique four-stage design and YZ-embedding techniques. These features enable a substantial boost in gain performance, achieving 19.65 dB at 146 GHz. The design incorporates a neutralizing capacitor for Y-embedding network and source degeneration capacitors coupled with transmission lines for Z-embedding network. Leveraging gain-plane method to evaluate the effect of embedding networks on maximum available gain, simulation results demonstrate a noise figure (NF) of 7.65 dB and peak power consumption of 26.3 mW from a 0.9 V supply, © 2024 IEEE.

关键词： Low noise amplifiers

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Vascular Age Prediction with PPG-Based LSTM Model 9

Vascular Age Prediction with PPG-Based LSTM Model

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9th International Conference on Control, Instrumentation and Automation, ICCIA 2023

作者： Abrisham, Kiana Pilevar Alipour, Khalil Tarvirdizadeh, Bahram Ghamari, Mohammad Laboratory Department of Mechatronics Engineering Tehran Iran Kettering University Flint Department of Electrical and Computer Engineering MI United States

ISBN: (纸本)9798350366013

Vascular aging encompasses structural and functional changes in blood vessels associated with aging, including increased stiffness, reduced elasticity, and atherosclerosis development. These changes contribute to cardiovascular diseases (CVDs), a global health challenge necessitating precise assessment methods. Evaluating vascular age involves comparing blood vessel health to chronological age, offering insights into arterial stiffness for potential cardiovascular disease prevention. In this study, we introduce an approach using Long Short-Term Memory (LSTM) models for vascular age prediction. Leveraging simulated Photoplethysmogram (PPG) waveforms from the radial artery and a diverse sample of healthy adults aged 25 to 75, our method offers a non-invasive, cost-effective means of health evaluation. Following 5-fold cross-validation, the LSTM-based model demonstrated significant performance, with an average test accuracy, precision, recall, and F1 Score of approximately 97%. This innovative approach, with its non-invasive nature, minimal power consumption, and user-friendly interface, showcases the potential of PPG technology's integration into various devices, such as fitness trackers, smartphones, and tablets, ensuring its widespread accessibility and applicability in real-world health assessments. Accurate vascular age prediction aids in identifying cardiovascular aging deviations and underlying disorders, advancing assessment methods and contributing to proactive cardiovascular health management. © 2023 IEEE.

关键词： Long short-term memory

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Broadband spin and angle co‑multiplexed waveguide‑based metasurface for six‑channel crosstalk‑free holographic projection

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eLight 2024年第1期4卷 223-237页

作者： Zeyang Liu Hao Gao Taigao Ma Vishva Ray Niu Liu Xinliang Zhang L.Jay Guo Cheng Zhang School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Department of Physics University of MichiganAnn ArborMI 48109USA Lurie Nanofabrication Facility Department of Electrical Engineering and Computer ScienceUniversity of MichiganAnn ArborMI 48109USA Department of Electrical Engineering and Computer Science University of MichiganAnn ArborMI 48109USA

Metasurface-based holograms,or metaholograms,offer unique advantages including enhanced imaging quality,expanded field of view,compact system size,and broad operational ***-channel metaholograms,capable of switching between multiple projected images based on the properties of illuminating light such as state of polarization and angle of incidence,have emerged as a promising solution for realizing switchable and dynamic holographic ***,existing designs typically grapple with challenges such as limited multiplexing channels and unwanted crosstalk,which severely constrain their practical ***,we present a new type of waveguidebased multi-channel metaholograms,which support six independent and fully crosstalk-free holographic display channels,simultaneously multiplexed by the spin and angle of guided incident light within the glass *** employ a k-space translation strategy that allows each of the six distinct target images to be selectively translated from evanescent-wave region to the center of propagation-wave region and projected into free space without crosstalk,when the metahologram is under illumination of a guided light with specific spin and azimuthal *** addition,by tailoring the encoded target images,we implement a three-channel polarization-independent metahologram and a two-channel full-color(RGB)***,the number of multiplexing channels can be further increased by expanding the k-space’s central-period region or combing the k-space translation strategy with other multiplexing techniques such as orbital angular momentum *** work provides a novel approach towards realization of high-performance and compact holographic optical elements with substantial information capacity,opening avenues for applications in AR/VR displays,image encryption,and information storage.

关键词： Metasurface Multi-channel metahologram Color metahologram Waveguide display

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A Secure and Cost-Effective Training Framework Atop Serverless Computing for Object Detection in Blasting

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computer Modeling in engineering & Sciences 2024年第5期139卷 2139-2154页

作者： Tianming Zhang Zebin Chen Haonan Guo Bojun Ren Quanmin Xie Mengke Tian Yong Wang Department of Computer and Science Shanghai Jiaotong UniversityShanghai200240China Aerospace System Engineering Shanghai Shanghai200240China State Key Laboratory of Precision Blasting Jianghan UniversityWuhan430056China Beijing Microelectronics Technology Institute Beijing100076China

The data analysis of blasting sites has always been the research goal of relevant *** rise of mobile blasting robots has aroused many researchers’interest in machine learning methods for target detection in the field of *** Computing can provide a variety of computing services for people without hardware foundations and rich software development experience,which has aroused people’s interest in how to use it in the field ofmachine *** this paper,we design a distributedmachine learning training application based on the AWS Lambda *** on data parallelism,the data aggregation and training synchronization in Function as a Service(FaaS)are effectively *** also encrypts the data set,effectively reducing the risk of data *** rent a cloud server and a Lambda,and then we conduct experiments to evaluate our *** results indicate the effectiveness,rapidity,and economy of distributed training on FaaS.

关键词： Serverless computing object detection blasting

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Hybrid Multistage Differential Rectifier for Indoor Light Energy Harvester in 65nm CMOS Technology 38

Hybrid Multistage Differential Rectifier for Indoor Light En...

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38th IEEE Region 10 Conference, TENCON 2023

作者： Diangco, Mike Martin C. Omongos, George C. Tabaculde, Nicole A. Palencia, Gene Fe P. Hora, Jefferson A. Mindanao State University Iligan Institute of Technology Microelectronics Laboratory Department of Electrical Engineering and Technology Iligan City9200 Philippines

ISBN: (纸本)9798350302196

This paper presents a design of a hybrid multistage differential rectifier dedicated for indoor light energy harvesters. For the first stage, a fully cross- coupled rectifier with two additional PMOS switches is used and conventional fully cross-coupled rectifiers are cascaded for the succeeding six stages. The proposed rectifier is designed using TSMC 65nm CMOS process for a smaller chip area. With an input voltage of 0.5 V operating at 10 MHz, the circuit obtained an output voltage of 2.08 V and output current of 10.4 mA. It allows improving the output current to as much as twice the value compared to that of a conventional multistage differential rectifier structure. The maximum power conversion efficiency obtained is 43.08 %. The total core chip area is 0.052 um2. All the design underwent multiple thorough verifications and simulations using Synopsys Custom Design Tool. © 2023 IEEE.

关键词： Internet of things

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How to Deploy Intelligent Reflecting Surfaces in Wireless Network:BS-side,User-side, or Both Sides?

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Journal of Communications and Information Networks 2022年第1期7卷 1-10页

作者： Changsheng You Beixiong Zheng Weidong Mei Rui Zhang Department of Electronic and Electrical Engineering Southern University of Science and Technology(SUSTech)Shenzhen 518055China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore School of Microelectronics South China University of Tech-nologyGuangzhou 511442China

The performance of wireless communication systems is fundamentally constrained by the random and uncontrollable wireless channel. By leveraging the recent advances in digitally-controlled metasurface, intelligent reflecting surface (IRS) has emerged as a promising solution to enhance the wireless network performance by smartly reconfiguring the radio propagation environment. Despite the substantial research on IRS-aided communications, this article addresses the important issue of how to deploy IRSs in a wireless network to achieve its optimum performance. We first compare the two conventional strategies of deploying IRS at the side of base station or users in terms of various communication performance metrics,and then propose a new hybrid IRS deployment strategy by combining their complementary advantages. Moreover,the main challenges in optimizing IRS deployment as well as their promising solutions are discussed. Numerical results are also presented to compare the performance of different IRS deployment strategies and draw useful insights for practical design.

关键词： intelligent reflecting surface(IRS) IRS deployment double-IRS system cooperative beamforming channel estimation

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Transient Angle Stability of Inverters Equipped with Robust Droop Control

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CSEE Journal of Power and Energy Systems 2023年第2期9卷 659-670页

作者： Chen Qi Keyou Wang Qing-Chang Zhong Jin Xu Guojie Li Key Laboratory of Control of Power Transmission and Conversion Ministry of EducationShanghai Jiao Tong UniversityShanghai 200240China Department of Electrical and Computer Engineering Illinois Institute of TechnologyChicagoIllinois60616USA

Transient angle stability of inverters equipped with the robust droop controller is investigated in this *** first,the conditions on the control references to guarantee the existence of a feasible post-disturbance operating point are ***,the post-disturbance equilibrium points are found and their stability properties are ***,the attraction regions of the stable equilibrium points are accurately depicted by calculating the stable and unstable manifolds of the surrounding unstable equilibrium points,which presents an explanation to system transient ***,the transient control considerations are provided to help the inverter ridethrough the disturbance and maintain its stability *** is shown that the transient angle stability is not a serious problem for droop controlled inverters with proper control settings.

关键词： Droop controlled inverter equilibrium point transient angle stability (un)stable manifold

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Low-Cost Dielectrophoresis-Based Microfluidic Chip for Label-Free Particle Separation with 3D Electrodes 31

Low-Cost Dielectrophoresis-Based Microfluidic Chip for Label...

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31st International Conference on electrical engineering, ICEE 2023

作者： Esmaeili, Fatemeh Alipour, Zeynab Fardmanesh, Mehdi University of Toronto Electrical and Computer Engineering Department Toronto Canada Sharif University of Technology Superconducting Electronics Research Laboratory Electrical Engineering Department Tehran Iran

ISBN: (纸本)9798350312560

In this article, an easy and low-cost fabrication method for microfluidic chips with 3D electrodes is proposed. As an application of this method, the fabricated chip has been employed as a particle separator using the dielectrophoresis force. This new design does not require a sheath current, and the separation can be done only by using an injection pump, which reduces cost and complexity. The developed microfluidic channel and electrodes are engraved simultaneously using a laser, and therefore the depth of the channel and the electrodes are equal, which increases the efficiency of the chip. Then the electrodes' engraved regions were filled up by silver paste to the level of that of the microchannel. This structure is used to separate live and dead yeast cells using dielectrophoresis force, generated efficiently throughout the channel using 3D electrodes. Simulations and experimental results, both confirm the effective performance of the microfluidic chip in this design. © 2023 IEEE.

关键词： Microfluidic chips

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