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2024 IEEE Microwaves, Antennas, and Propagation Conference, MAPCON 2024

作者： Choudhary, Anshuman Akhtar, M. Jaleel Materials Science Programme Indian Institute of Technology Kanpur Kanpur India Department of Electrical Engineering & Materials Science Programme Indian Institute of Technology Kanpur Kanpur India

ISBN: (纸本)9798350379693

A flexible, optically transparent and lightweight silver nanowires (AgNWs) based thin film is demonstrated for the electromagnetic interference (EMI) shielding applications. The process involves the synthesis of silver nanowires with a length of 60 µm and a diameter of 169 nm using the polyol process. These AgNWs are then deposited on polyethylene terephthalate (PET) sheet via drop-casting to create a silver nanowire-polyethylene terephthalate (AgNWPET) layer. The resulting thin film forms AgNW networks with a sheet resistance (Rs) of 70.73 Ω/sq, which provides conductive paths for the EM waves in the specified frequency band thereby providing adequate shielding. This film is found to be quite effective as the EMI shielding layer, providing a total shielding effectiveness (SET) above 10 dB in the X-band (8.2-10.5 GHz), for a thickness of only 100.8 µm. The proposed AgNWPET film is also simulated using the CST Microwave Studio to optimize various parameters, and the measured SET agrees well with the simulated results. The high aspect ratio (355) of AgNWs allows optical frequencies to pass through, thereby making it optically transparent. The proposed thin sheet is lightweight, highly flexible, and optically transparent, making it ideal for EMI shielding applications in the aerospace and defense industry. © 2024 IEEE.

关键词： Aspect ratio

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Phase-tailored assembly and encoding of dissipative soliton molecules

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Light(science & Applications) 2023年第6期12卷 1061-1070页

作者： Yusong Liu Siyun Huang Zilong Li Haoguang Liu Yixiang Sun Ran Xia Lisong Yan Yiyang Luo Huanhuan Liu Gang Xu Qizhen Sun Xiahui Tang Perry Ping Shum School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhanChina Key Laboratory of Optoelectronic Technology and Systems(Ministry of Education) Chongqing UniversityChongqingChina School of Engineering and Materials Science Queen Mary University of LondonLondonUK Department of Electronic and Electrical Engineering Southern University of Science and TechnologyShenzhenChina

Self-assembly of particle-like dissipative solitons,in the presence of mutual interactions,emphasizes the vibrant concept of soliton molecules in varieties of laser *** manipulation of the molecular patterns,held by the degrees of freedom of internal motions,still remains challenging to explore more efficient and subtle tailoring approaches for the increasing ***,we report a new phase-tailored quaternary encoding format based on the controllable internal assembly of dissipative soliton *** manipulation of the energy exchange of soliton-molecular elements stimulates the deterministic harnessing of the assemblies of internal ***-assembled soliton molecules are tailored into four phase-defined regimes,thus constituting the phase-tailored quaternary encoding *** phase-tailored streams are endowed with great robustness and are resistant to significant timing *** these results experimentally demonstrate the programmable phase tailoring and exemplify the application of the phase-tailored quaternary encoding,prospectively promoting high-capacity all-optical storage.

关键词： soliton dissipative quaternary

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Path Planning for an Autonomous Vehicle based on the Ant Colony Algorithm: A Review

Path Planning for an Autonomous Vehicle based on the Ant Col...

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2023 International Workshop on Artificial Intelligence and Image Processing, IWAIIP 2023

作者： Sari, Desi Windi Dwijayanti, Suci Suprapto, Bhakti Yudho Universitas Sriwijaya Faculty of Engineering Department of Electrical Engineering Palembang Indonesia Universitas Sriwijaya Doctoral Program in Engineering Science Faculty of Engineering Palembang Indonesia

ISBN: (纸本)9798350382914

Efficient path planning technology for autonomous vehicles not only yields significant time savings but also contributes to reducing fuel usage. Various methodologies have been introduced and documented in the literature concerning the path planning of autonomous vehicles. While these methodologies may not ensure an optimal solution, they have demonstrated successful applications in their respective contexts, especially the ant colony algorithm. Nevertheless, not many papers discuss the literature review from the viewpoint of ant colony-based path planning. This paper aims to provide a comprehensive review encompassing the modeling, optimization criteria, and solution algorithms related to the ant colony for path planning. In this study, the review of the ant colony algorithm is divided into global and local path planning. Based on the review results, the ant colony algorithm appears suitable for global path planning. To achieve better performance, it can be combined with other algorithms such as artificial potential field (APF), genetic algorithm, and particle swarm algorithm. These studies are conducted solely in simulations. Therefore, further research should be carried out to ensure the performance of combining the ant colony and APF for autonomous vehicles for both global and local path planning. © 2023 IEEE.

关键词： Autonomous vehicles

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A Balloon-Based UAV-Aided Non-Terrestrial Sectorized Network for Post Disaster Cellular Coverage: A Dynamic Environment Perspective 7

A Balloon-Based UAV-Aided Non-Terrestrial Sectorized Network...

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7th International Conference on Advanced Communication Technologies and Networking, CommNet 2024

作者： Dabiri, Mohammad Taghi Hasna, Mazen Althunibat, Saud Qaraqe, Khalid Alouini, Mohamed-Slim Qatar University Department of Electrical Engineering Doha Qatar Al-Hussein Bin Talal University Department of Communications Engineering Jordan Hamad Bin Khalifa University Electrical Engineering Program College of Science and Engineering Qatar King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia

ISBN: (纸本)9798350367027

With the advancements in low-earth orbit (LEO) constellations, modern aerial platforms (APs), sector antennas, and device technologies, it is now becoming feasible to provide aerial platform-based cellular network (APCN) as an efficient and easy-To-deploy solution for post-disaster internet recovery. Similar to the terrestrial networks (TNs), sector access antennas have a huge potential for their usage in APs, such as tethered balloons, to provide a wide coverage and high-speed internet connectivity in disaster areas. However, in this paper, we show that many significant challenges remain in their commercial deployments which have received less attention so far. For instance, as the main cause of other challenges, by providing realistic 3D network simulations, we show that sectorized antenna-based APCNs suffer from inherent motions and vibrations of floating AP topologies, which causes moving and dynamic holes in the coverage and thus, confirms that the design of these APCNs is much more complicated than fixed TNs. To this end, by providing an easy-To-read brief review of existing aerospace post-disaster solutions, we show the superiority of APCNs which can bring several key benefits over the existing topologies, and then technically discuss its various challenges and open problems that need to be addressed before they can be deployed at a large scale. © 2024 IEEE.

关键词： Tropics

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Evaluation of Ni–B alloy electroplated with different anionic groups

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Journal of materials Research and Technology 2023年 27卷 8360-8371页

作者： Cheng, An-Yu Pu, Nen-Wen Liu, Yih-Ming Hsieh, Min-Syuan Ger, Ming-Der Department of Chemistry & Materials Engineering Chung Cheng Institute of Technology National Defense University Taiwan Taoyuan Taiwan Department of Electrical Engineering Yuan Ze University Zhongli Taiwan Taoyuan320 Taiwan System Engineering and Technology Program National Chiao Tung University Hsinchu Taiwan

In order to study the effects of the main nickel salt on the electroplated nanocrystalline Ni–B alloy coating, the deposition rates, surface morphology, crystallinity, grain sizes, hardness, and corrosion resistance of the Ni–B films electrodeposited with plating baths containing separately nickel sulfate (NS) and nickel sulfamate (NSA) under various temperatures and current densities were compared. Under all conditions, the NSA bath system offered higher deposition rates and lower B contents than the NS counterpart because of the formation of Ni-ammonium complex, which can be adsorbed faster than nickel ions. These two groups of coatings had similar surface morphology and crystallinity under all plating conditions except for those plated with the NS bath system at 60 °C, wherein significant changes in surface texture and preferred crystal orientation as well as an abrupt increase in grain size occurred. The coating hardness was optimized by reducing the grain size and increasing the boron content because of the combined effects of grain refinement strengthening and solid solution strengthening. The differences between the two main salt systems can be explained by the presence of ammonium ions in the NSA bath, which not only increased the deposition rate but also maintained the preferred orientation in Ni (111) at high temperature. Our results indicate that, under high current density and high temperature operation conditions, the NSA main salt plating system is a more favorable option for obtaining higher quality Ni–B alloy coatings. © 2023 The Authors

关键词： Sulfur compounds

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High-Speed Visible Light Communication Using Phenothiazine/Dimesitylborane Derivatives as Color Conversion materials in Semipolar Micro-LED-Based White-Light Systems

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ACS Photonics 2024年第2期11卷 489-497页

作者： Sadhu, Annada Sankar Chen, Li-Yin Pai, Yi-Hua Hsieh, Chung-An Lin, Hao-Wu Chow, Chi-Wai Kuo, Hao-Chung Department of Photonics Institute of Electro-Optical Engineering College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu30010 Taiwan Semiconductor Research Center Hon Hai Research Institute Taipei11492 Taiwan College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu30010 Taiwan Department of Materials Science and Engineering National Tsing Hua University Hsinchu30013 Taiwan

Visible light communication (VLC) has emerged as a cutting-edge high-speed communication technology, poised to meet the surging capacity demands of 6G networks. Micro-light-emitting diodes (μLEDs) are considered as the light sources for achieving high-speed VLC, distinguished by their remarkable modulation bandwidths. However, achieving broadband white light emission hinges on the utilization of color-conversion materials with wide emission spectra. The transmission speed of the white-light system is inherently constrained by the characteristics of these color-conversion materials. In this work, we demonstrate CC-MP7 and CC-MP8, two derivatives of phenothiazine/dimesitylborane, as color conversion materials in a semipolar (20-21) micro-LED-based white-light system for high-speed VLC. The color conversion layers possess wide emission spectra, enabling them to achieve excellent color rendering performance when combined with blue micro-LEDs. CCMP7 and CC-MP8 demonstrate rapid photoluminescence decay characteristics, thereby enhancing the modulation bandwidth of the color-conversion layer in the white-light system. The resulting bandwidths achieved by CC-MP7 and CC-MP8 are 210 and 240 MHz, respectively, which represents an approximately 45-fold increase compared to ordinary phosphors. By combining semipolar (20-21) micro-LEDs with CC-MP7 and CC-MP8, the resulting white-light systems exhibit correlated color temperatures of 6860 and 7500 K, CIE coordinates of (0.3009, 0.3577) and (0.2958, 0.3129), and color-rendering indexes of 80 and 85, respectively. Furthermore, both systems offer high bandwidths of 1063 and 1084 MHz with the data rates of 1.72 Gbps and 1.74 Gbps using non-return-to-zero on-off keying (NRZ-OOK) format, respectively, indicating the significant potential of CC-MP7 and CC-MP8 for practical applications in VLC. © 2024 The Authors.

关键词： Bandwidth

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Design and Analysis of Novel High-Gain Boost Converter for Renewable Energy Systems (RES)

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IEEE Access 2024年 12卷 24262-24273页

作者： Lin, Chang-Hua Khan, Mohammad Suhail Ahmad, Javed Liu, Hwa-Dong Hsiao, Tung-Chun National Taiwan University of Science and Technology Department of Electrical Engineering Taipei 106 Taiwan National Taiwan Normal University Undergraduate Program of Vehicle and Energy Engineering Taipei 106 Taiwan

High-gain DC-DC converters are becoming increasingly popular in renewable energy applications and solar PV systems. This article introduces a non-isolated non-coupled inductor-based high-gain DC-DC boost converter with the desirable features of low voltage stress on controlled power switches and high voltage gain at lower duty ratios. The proposed converter is well suited for boosting the low-input DC voltage obtained from distributed generation units like photovoltaic (PV) or fuel cells to substantially higher DC voltage. The converter comprises only two switches, and a single PWM signal governs its operation. These characteristics result in a topology that is more compact, less costly, lighter weight, and easier to control. The proposed converter is compared with some previously developed topologies of high-gain boost converters across various performance parameters. This comparison illustrates that the proposed model surpasses them in every aspect. A 300 W hardware prototype of a proposed model is developed and tested in a laboratory environment to confirm the theoretical assertions of a proposed model. The proposed topology offers a promising solution and enables a high gain of approximately 12 times the input voltage at a smaller duty ratio, specifically 11.25 at a duty of 0.6 and 17.77 at a duty of 0.7. The efficiency of a proposed converter ranges between 92.5% to 94.5% making it appropriate for numerous medium-high power applications. The uniqueness of the suggested system is its simple design and greater efficiency, which provides a more considerable gain and higher output voltages for sustainable energy systems. © 2013 IEEE.

关键词： boost converter dc(!-!)dc converter high gain Renewable energy system (RES)

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In situ Observation of Lithium Stripping and Plating Process in an Open-cell All-solid-state Lithium Metal Battery

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Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada 2023年第1期29卷 1287-1288页

作者： Wu, C. Zhao, L. Ai, Q. Risal, S. Lou, J. Yao, Y. Fan, Zheng Materials Science and Engineering Program and Texas Center for Superconductivity at the University of Houston University of Houston Houston TX United States Department of Electrical and Computer Engineering University of Houston Houston TX United States Department of Materials Science and Nano Engineering Rice University Houston TX United States Department of Engineering Technology University of Houston Houston TX United States

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Environmental Stability Study of Solution-Processed Black Phosphorus

Environmental Stability Study of Solution-Processed Black Ph...

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2023 IEEE MetroCon, MetroCon 2023

作者： Mather, Thomas Mehta, Ravindra Kaul, Anupama B. University of North Texas Department of Electrical Engineering DentonTX76207 United States University of North Texas Department of Materials Science and Engineering DentonTX76207 United States University of North Texas Department of Electrical Engineering Department of Materials Science and Engineering DentonTX76207 United States

ISBN: (纸本)9798350317336

As two-dimensional materials gain increased traction toward device applications, the need to expand on the material used proportionally increases. Black phosphorus (BP) is a notable two-dimensional material that exhibits favorable optical characteristics such as a bandgap tunable by the thickness of the material. Despite the favorable properties of the material, BP is highly susceptible to environmental conditions such as moisture and oxygen exposure. This shortcoming has stunted the growth of BP manufacture via additive manufacturing methods such as ink-jet printing with chemically exfoliated material. In this work, we fabricated graphene and BP electronic devices on silicon substrates via ink-jet printing and tested their stability when subjected to varying temperatures and ambient exposure times. To ensure the quality of the both devices, Raman spectroscopy was performed where both A_g^l and A_g^2 vibrational modes were observed in BP. To combat the onset of oxidative degradation, the BP device was coated with ionic liquids (ILs) as a passivation layer. Two-terminal I/V measurements were conducted at 0,6,24, and 48 hours to monitor current changes over a 48-hour period, as well as an 18-month test for graphene. We also tested the effects of temperature from 5 - 335 Kelvin for BP. Overall, this study demonstrates that passivating with ionic liquids is an effective avenue for more robust solution processed black phosphorus devices. © 2023 IEEE.

关键词： Graphene

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A flexible capacitive photoreceptor for the biomimetic retina

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Light(science & Applications) 2022年第1期11卷 38-49页

作者： Mani Teja Vijjapu Mohammed E.Fouda Agamyrat Agambayev Chun Hong Kang Chun-Ho Lin Boon S.Ooi Jr-Hau He Ahmed M.Eltawil Khaled N.Salama Sensors lab Advanced Membranes and Porous Materials CenterComputerElectrical and Mathematical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia Communication and Computing Systems Lab ComputerElectrical and Mathematical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia Department of Electrical Engineering and Computer Science University of California-IrvineIrvineCA 92612USA Department of Electrical Computer and Energy EngineeringArizona State UniversityTempeAZUSA Computer Electrical and Mathematical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia Department of Materials Science and Engineering City University of Hong KongHong Kong SARChina

Neuromorphic vision sensors have been extremely beneficial in developing energy-efficient intelligent systems for robotics and privacy-preserving security *** is a dire need for devices to mimic the retina's photoreceptors that encode the light illumination into a sequence of spikes to develop such ***,we develop a hybrid perovskite-based flexible photoreceptor whose capacitance changes proportionally to the light intensity mimicking the retina's rod cells,paving the way for developing an efficient artificial retina *** proposed device constitutes a hybrid nanocomposite of perovskites(methyl-ammonium lead bromide)and the ferroelectric terpolymer(polyvinylidene fluoride trifluoroethylene-chlorofluoroethylene).A metal-insulator-metal type capacitor with the prepared composite exhibits the unique and photosensitive capacitive behavior at various light intensities in the visible light *** proposed photoreceptor mimics the spectral sensitivity curve of human photopic *** hybrid nanocomposite is stable in ambient air for 129 weeks,with no observable degradation of the composite due to the encapsulation of hybrid perovskites in the hydrophobic *** functionality of the proposed photoreceptor to recognize handwritten digits(MNIST)dataset using an unsupervised trained spiking neural network with 72.05%recognition accuracy is *** demonstration proves the potential of the proposed sensor for neuromorphic vision applications.

关键词： perovskite illumination preserving

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