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29th Annual International Conference on Mobile Computing and Networking, MobiCom 2023

作者： Johnson, Kyle Englhardt, Zachary Arroyos, Vicente Yin, Dennis Patel, Shwetak Iyer, Vikram Paul G. Allen School of Computer Science and Engineering University of Washington Seattle60015481 United States Department of Electrical and Computer Engineering University of Washington Seattle60015481 United States

ISBN: (纸本)9781450399906

We present MilliMobile: a first of its kind battery-free autonomous robot capable of operating on harvested solar and RF power. We challenge the conventional assumption that motion and actuation are beyond the capabilities of battery-free devices and demonstrate completely untethered autonomous operation in realistic indoor and outdoor lighting as well as RF power delivery scenarios. We show first that through miniaturizing a robot to gram scale, we can significantly reduce the energy required to move it. Second, we develop methods to produce intermittent motion by discharging a small capacitor (47 - 150 μF) to move a motor in discrete steps, enabling motion from as little as 50 μW of power or less. We further develop software defined techniques for maximizing power harvesting. MilliMobile operates in the optimal part of the charging curve by varying the charging time to achieve maximum speeds of up to 5.5 mm/*** MilliMobile prototype has a 10x10 mm chassis and weighs less than 1.1 g. Our robot can carry payloads 3 times its own weight, and only experiences a 25% reduction in speed when carrying a 1 g payload. We demonstrate operation on 10 different surfaces ranging from wood and concrete to compact soil. We further show the ability to cold-start and move in light conditions as low as 20 W/m2 and -10 dBm of RF power. In addition to operating on harvested power, our robot demonstrates sensor and control autonomy by seeking light using onboard photodiodes, and can transmit sensor data wirelessly to a base station over 200 m away. © 2023 Owner/Author(s).

关键词： Energy harvesting

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Integrated Platform for Spin-Photon Interfaces in Silicon

Integrated Platform for Spin-Photon Interfaces in Silicon

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2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Song, Hanbin Zhang, Xueyue Zhi, Yiyang Komza, Lukasz Sipahigil, Alp Department of Materials Science and Engineering University of California Berkeley BerkeleyCA94720 United States Materials Sciences Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Department of Electrical Engineering and Computer Sciences University of California Berkeley BerkeleyCA94720 United States Department of Physics University of California Berkeley BerkeleyCA94720 United States

We demonstrate optical initialization and readout of electron spins of a single T center in a silicon nanophotonic waveguide. We present progress for coherent control of the waveguide single spin for silicon spin-phot... 详细信息

ISBN: (纸本)9781957171395

关键词： Electron optics

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Innovative Solutions for Water and Energy Challenges in Agriculture: A Review of Solar-Powered Irrigation Systems 1

Innovative Solutions for Water and Energy Challenges in Agri...

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1st International Conference on Circuits, Power, and Intelligent Systems, CCPIS 2023

作者： Mohammed, Ahmed Musa Samikannu, Ravi Kumar, P. Marish Sailaja, Indu Venkatesh, V. Yahya, Abid Tlemcen Algeria Saveetha Institute of Medical and Technical Sciences Department of Vlsi & Microelectronics Chennai India Easwari Engineering College Department of Electrical and Electronics Engineering Tamil Nadu Chennai India Rajalakshmi Engineering College Department of Electrical and Electronics Engineering Tamil Nadu Chennai India Botswana International University of Science and Technology Department of Electrical Computer and Telecommunications Engineering Palapye Botswana

ISBN: (纸本)9798350315769

The increasing population in developing countries is putting pressure on the demand for more food production, and modernization efforts are being made in the agricultural sector. In many developing countries, rainwater is heavily relied upon for agricultural practices, but the government and regional authorities have implemented various measures to enhance the accessibility of water for agriculture throughout the year. The majority of farmers depend on groundwater as their main water source, but the increasing prices of fossil fuels and inadequate electric grids in remote areas pose challenges to traditional water pumping methods. One solution to achieving sustainable and profitable agriculture is using renewable energy sources like solar energy for water pumping, which offers advantages such as reduced pollution and no fuel costs in the long term. Developing countries have widely adopted solar pumps, but the success of this technology depends on various elements like climatic conditions, crop type, groundwater availability, government support, and the cost and availability of conventional electricity. © 2023 IEEE.

关键词： Solar energy

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Optimal phase-based control of strongly perturbed limit cycle oscillators using phase reduction techniques

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Physical Review E 2024年第2期109卷 024223-024223页

作者： Adharaa Neelim Dewanjee Dan Wilson Department of Electrical Engineering and Computer Science University of Tennessee Knoxville Tennessee 37996 USA.

Phase reduction is a well-established technique for analysis and control of weakly perturbed limit cycle oscillators. However, its accuracy is diminished in a strongly perturbed setting where information about the amplitude dynamics must also be considered. In this paper, we consider phase-based control of general limit cycle oscillators in both weakly and strongly perturbed regimes. For use at the strongly perturbed end of the continuum, we propose a strategy for optimal phase control of general limit cycle oscillators that uses an adaptive phase-amplitude reduced order model in conjunction with dynamic programming. This strategy can accommodate large magnitude inputs at the expense of requiring additional dimensions in the reduced order equations, thereby increasing the computational complexity. We apply this strategy to two biologically motivated prototype problems and provide direct comparisons to two related phase-based control algorithms. In situations where other commonly used strategies fail due to the application of large magnitude inputs, the adaptive phase-amplitude reduction provides a viable reduced order model while still yielding a computationally tractable control problem. These results highlight the need for discernment in reduced order model selection for limit cycle oscillators to balance the trade-off between accuracy and dimensionality.

关键词： Circadian rhythms Collective behavior Neuronal dynamics Population dynamics Phase oscillator models Phase space methods

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Real-time programmable metasurface for terahertz multifunctional wave front engineering

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Light(science & Applications) 2023年第9期12卷 1795-1806页

作者： Feng Lan Luyang Wang Hongxin Zeng Shixiong Liang Tianyang Song Wenxin Liu Pinaki Mazumder Ziqiang Yang Yaxin Zhang Daniel M.Mittleman Sichuan THz Communication Technology Engineering Research Center School of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 611731China Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313000China Zhangjiang Laboratory Shanghai 201204China National Key Laboratory of Solid-State Microwave Devices and Circuits Hebei Semiconductor Research InstituteShijiazhuang 050051China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100094China University of Chinese Academy of Sciences School of ElectronicElectrical and Communication EngineeringBeijing 101408China Department of Electrical Engineering and Computer Science University of MichiganAnn ArborMI 48109USA School of Engineering Brown UniversityProvidenceRI 02912USA

Terahertz(THz)technologies have become a focus of research in recent years due to their prominent role in envisioned future communication and sensing *** of the key challenges facing the field is the need for tools to enable agile engineering of THz wave ***,we describe a reconfigurable metasurface based on GaN technology with an array-of-subarrays *** subwavelength-spaced array,under the control of a 1-bit digital coding sequence,can switch between an enormous range of possible configurations,providing facile access to nearly arbitrary wave front control for signals near 0.34 *** demonstrate wide-angle beam scanning with 1°of angular precision over 70 GHz of bandwidth,as well as the generation of multi-beam and diffuse wave fronts,with a switching speed up to 100 *** device,offering the ability to rapidly reconfigure a propagating wave front for beam-forming or diffusively scattered wide-angle coverage of a scene,will open new realms of possibilities in sensing,imaging,and networking.

关键词： wave scattered arbitrary

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On The Performance and Calibration of Arbitrarily Conformal Additively Manufactured Phased Arrays for Wearable, Deployable, and Morphing RF Applications

On The Performance and Calibration of Arbitrarily Conformal ...

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2024 IEEE International Symposium on Phased Array Systems and Technology, ARRAY 2024

作者： Positano, Francesco Jamal, Hani Al Lizzi, Leonardo Tentzeris, Manos M. Université Côte d'Azur LEAT Campus SophiaTech Sophia Antipolis France School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta United States University of Trento Department of Information Engineering and Computer Science Trento Italy

ISBN: (纸本)9798350392142

This paper introduces and evaluates various folding configurations of a phased array aiming to investigate its shape-changing capabilities. A phased array of four 9.75 GHz series-fed patch radiators, each consisting of five patch elements is utilized. These configurations include convex, concave, and accordion-like shapes. Conforming a phased array on static or dynamically shape-changing structures inevitably affects the radiation characteristics, which must in turn be studied and re-calibrated. Alternatively, shape-change may intentionally be used in conjunction with electrical beamforming to achieve higher levels of radiation pattern reconfigurability. Results demonstrate that convex and accordion-like structures effectively minimize the array's projected surface area while maintaining relatively low losses. Additionally, while convex-folded phased arrays inherently reduce the gain and coverage angles when compared to a planar array, an operation mechanism based on selectively activating different elements is proposed to improve performance. Finally, the paper outlines the fabrication of an additively manufactured flexible prototype to realize the different configurations. © 2024 IEEE.

关键词： Antenna phased arrays

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Exploring the Hidden Potential of Cyber Security Oriented Intelligent Data Hiding in Encrypted Images 1

Exploring the Hidden Potential of Cyber Security Oriented In...

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1st International Conference on Electronics, Communication and Signal Processing, ICECSP 2024

作者： Nirmaladevi, K. Nagarajan, Anandh Tamizharasi, A. Ramya, R. Allirani, P. Sreenivasa Reddy, M. Panimalar Engineering College Department of Computer Science and Engineering Tamil Nadu Chennai India Andhrapradesh Madanapalle India R.M.D. Engineering College Department of Computer Science and Engineering Tamil Nadu Chennai India Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Department of Nano Electronics Materials and Sensors Tamil Nadu Chennai India Prince Shri Venkateshwara Padmavathy Engineering College Department of Information Technology Tamil Nadu Chennai India MLR institute of technology Department of EEE Telangana Hyderabad India

ISBN: (纸本)9798350364590

In recent years, there has been a surge of interest in the possibility of reversible data hiding inside encrypted images due to the promising practical uses of this technology, which include content owner identification, privacy protection, and encrypted picture authentication. Data hiding refers to the process of concealing data within a cover material. It is possible to conceal data in visual, auditory, textual, and graphical formats. Pictures, particularly digital pictures, can be used to conceal data. This data may be authentication details or author information, or it might be any text that is relevant to the image. The receiving end has to be able to decipher the encrypted data and restore the original picture. Advanced Cipher Logic based Data concealing (ACLDH) is a data concealing approach that meets this condition;it allows for accurate recovery of the host image. The losslessness of this method makes it well-suited for use in the medical field, the military, and cloud storage. After extracting the concealed data from an encrypted image, the suggested technique, known as ACLDH, may restore the original image to its original state without introducing any deformation. These days, reversible data hiding in encrypted graphics is all the rage because of its great quality: you can have your original cover back after removing the hidden data. It safeguards the initial data as well. Reversible Data Hiding (RDH) techniques that are now available for encrypted photos may be classified into two groups: those that do not preprocess the images and those that does. In this research, we show how to use adaptive thresholding to increase data concealing capacity and how to retrieve the original picture from a tagged image without distortion. © 2024 IEEE.

关键词： ACLDH Advanced Cipher Logic Cyber Security Data Hiding Encrypted Images Intelligent Data Hiding RDH Reversible Data Hiding

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Analysis of a Transformerless High Step-Down DC-DC Converter

Analysis of a Transformerless High Step-Down DC-DC Converter

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2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023

作者： Truong, Phan Nhat Anh Dung, Nguyen Liu, Yu-Chen Chiu, Huang-Jen National Taiwan University of Science and Technology Department of Electronic and Computer Engineering Taipei Taiwan Virginia Polytechnic Institute and State University Department of Electrical and Computer Engineering Blacksburg United States National Taipei University of Technology Department of Electrical Engineering Taipei Taiwan

ISBN: (纸本)9798350316445

The analysis and performance of a proposed high step-down DC-DC converter without employing transformers are discussed in this article. The operating principle of the control signals in this proposed converter is similar to the traditional two-phase interleaved buck converter, resulting in a simple controller. Moreover, the proposed converter has lower switches' voltage stress than the traditional buck converter. Therefore, the low voltage rating switches can be considered to achieve low losses, high efficiency, and low cost. Besides, the comparisons between the proposed converter and the previous high step-down topologies are presented to show the benefits of the proposed topology such as lower passive component count and higher effective duty cycle range. The experimental results of the 48W prototype have been provided to validate the theoretical analysis. © 2023 IEEE.

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Enhancing Peer-to-Peer Energy Trading Efficiency and Fairness Through a Hybrid Auction Mechanism in Decentralized Smart Grids 49

Enhancing Peer-to-Peer Energy Trading Efficiency and Fairnes...

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49th Annual Conference of the IEEE Industrial Electronics Society, IECON 2023

作者： Arora, Mayank Gururaj, M.V. Sharma, Ankush Chilamkurti, Naveen Indian Institute of Technology Kanpur Department of Electrical Engineering India La Trobe University Department of Computer Science and IT MelbourneVIC Australia

ISBN: (纸本)9798350331820

This paper explores hybrid auction mechanism to incentivize peer-to-peer (P2P) energy trading in decentralized smart grid system to maximize societal welfare. P2P energy trading is a promising approach for leveraging renewable energy sources, allowing users to generate and exchange energy within local networks. In this context, buyers represent consumers, while sellers are prosumers, acting as both energy producers and consumers over time. Buyers are incentivized to procure energy from sellers due to the lower cost and greener source of energy compared to the centralized grid. In addition, the production and dissemination of renewable energy on a smaller scale mitigates the burden on transmission infrastructure, thereby decreasing reliance on the primary power grid. To optimize energy trading, We propose a hybrid auction that takes into account the constraints of grid infrastructure, such as transmission line capacity and related expenses, in order to increase the profitability of energy trading. The mechanism ensures individual rationality, truthfulness, computational efficiency, and fairness in the bidding process. Through mathematical examination and simulation experiments, the hybrid auction mechanism is assessed for its efficacy in enhancing energy trading efficiency and facilitating equitable resource allocation. This research contributes to the advancement of P2P energy trading mechanisms, enabling efficient use of renewable energy resources in decentralized smart grid environment. © 2023 IEEE.

关键词： Smart power grids

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A Tensor-based t-SVD-LSTM Remaining Useful Life Prediction Model for Industrial Intelligence

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IEEE Transactions on Industrial Informatics 2022年 1-12页

作者： Wang, Xiaokang Yang, Laurence T. Cao, Enyuan Guo, Luyang Ren, Lei Deen, M. Jamal School of Computer Science and Technology Hainan University Haikou China School of Artificial Intelligence University of the Chinese Academy of Sciences Beijing China School of Information and Communication Engineering University of Electronic Science and Technology of China Chengdu China School of Automation Science and Electrical Engineering Beihang University Beijing China Department of Electrical and Computer Engineering McMaster University Hamilton Canada

The Industrial Internet of Things (IIoT) integrates smart sensors and actuators for the widespread digitization and enhancement of industrial and manufacturing processes. Smart equipment is used to improve the industrial intelligence and make industrial production more flexible, safer and more efficient. For complex equipment, product life-cycle management (PLM) including remaining useful life (RUL) is one of the essential issues for industrial intelligence. In this paper, a tensor-based remaining useful life prediction model is proposed to facilitate the life-cycle management, which combines features from time domain and frequency domain. For the characteristics of continuous generation of industrial data streaming, tensor singular value decomposition (t-SVD) is combined with long shortterm memory network (LSTM) method to predict the RUL of devices from high-order and high-noise time series data. Finally, experiments are carried out on three different data sets including the battery charge and discharge data set, the bearing acceleration life cycle data set, and the turbofan data set to measure the performance of the proposed model. IEEE

关键词： Time domain analysis

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