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3rd International Conference on Energy Systems, Drives and Automations, ESDA 2020

作者： Agnihotri, Suneet Kumar Prashant, D.v. Samajdar, Dip Prakash Nanoscale Device Circuit and System Design Lab Electronics and Communication Engineering Discipline PDPM-Indian Institute of Information Technology Jabalpur482005 India

ISBN: (纸本)9789811672736

The use of nanostructures over traditional bulk and thin film solar cells increases the absorption of light due to the coupled effects of intrinsic antireflection and strong excitation of resonance modes. Therefore, to increase the absorption over the wavelength of 300 to 1600 nm, InP nanowires (NWs) are grown on Ge substrates to design tandem solar cells, which particularly broaden the absorbed solar spectrum. In this article, we have performed the optical simulation and optimized the dimensions of the InP NWs such as period, diameter, and height of the InP NW and thickness of Ge substrate for current matching between the two sub cells using the FDTD simulation software. The performance parameters such as Photogeneration rate, Electric-field, and absorption power are compared by considering different simulation regions of InP NWs only, Ge substrate only, and combination of InP NW and Ge substrate. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Nanowires

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Enabling Enterprise Autonomy Development with a Unified Data Infrastructure

Enabling Enterprise Autonomy Development with a Unified Data...

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Big Data v: Learning, Analytics, and Applications 2023

作者： Dotterrer, Kyle Schramke, Brian A. Ponce-Pore, Abby E.v. Sturzinger, Eric M. Hargrove, Henry Lowrance, Christopher J. Army Artificial Intelligence Integration Center U.S. Army Futures Command PittsburghPA United States Carnegie Mellon University PittsburghPA United States RAND Corporation United States

ISBN: (数字)9781510661592

ISBN: (纸本)9781510661585

Data is the cornerstone of Artificial Intelligence (AI) and Machine Learning (ML) systems. As the Department of Defense (DoD) leverages AI/ML to develop, test, and deploy autonomous vehicle capabilities, management of autonomy data will become increasingly important. Modern sensors on autonomous vehicles generate an enormous amount of data, and making this data available for further research presents a significant challenge. Moving such large volumes of data from a field environment to a centralized, cloud-based data lake is not straightforward, nor necessarily efficient for data of unknown enterprise utility. As a result, much of DoD’s autonomy data remains siloed in geographically or logically separated on-premises and cloud-based data stores in mixed formats. Organizations within DoD’s modernization enterprise require a mature data infrastructure to store, discover, share, and collaborate upon datasets, models, and other artifacts efficiently. In this paper, we examine the characteristics a data infrastructure must exhibit to meet the needs of the DoD for autonomy research. These characteristics are identified through a review of existing solutions, use cases, and current industry best practices. On the basis of this review, we propose a set of requirements for DoD’s data infrastructure for autonomous systems research. Moreover, an analysis of the viability of various options, including centralized and decentralized architectures, is provided through the lens of DoD data requirements and unique organizational constraints. While data infrastructure for autonomy is our primary concern, the requirements and design we propose generalize to other AI tasks that are of interest to DoD. © 2023 SPIE.

关键词： Information management

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A design of Filament Power Supply Based on UC3842 Controller 7

A Design of Filament Power Supply Based on UC3842 Controller

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7th International Conference on Electromechanical Control Technology and Transportation, ICECTT 2022

作者： Lin, Yihua Jiang, Haiming You, Jing Hu, Lang Li, Xiaofeng Qiao, Jian State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment School of Electromechanical Engineering Guangdong University of Technology Guangdong Guangzhou China Microwave and Vacuum Technology Laboratory Jihua Laboratory Guangdong Foshan China

ISBN: (纸本)9781510656659

When the high power microwave power supply system works normally, the magnetron has higher requirements for the filament power supply. In order to solve the problems of long response time and unstable output voltage of filament power supply, This wrok applied UC3842 as a current mode PWM generator component to construct a single-ended forward filament power supply with AC208v input and DC5v output. And the working principle of the main circuit and the design of the control circuit are analyzed in detail. The validity of the circuit is verified by the simulation results. © 2022 SPIE

关键词： Electric network analysis

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Rate-Distortion Theory in Coding for Machines and its Applications

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IEEE Transactions on Pattern Analysis and Machine Intelligence 2025年第7期PP卷 PP页

作者： Harell, Alon Foroutan, Yalda Ahuja, Nilesh Datta, Parual Kanzariya, Bhavya Somayazulu, v. Srinivasa Tickoo, Omesh de Andrade, Anderson Bajic, Ivan v. Simon Fraser University 8888 University Drive BurnabyBCV5S1A6 Canada Intel Labs United States

Recent years have seen a tremendous growth in both the capability and popularity of automatic machine analysis of media, especially images and video. As a result, a growing need for efficient compression methods optimised for machine vision, rather than human vision, has emerged. To meet this growing demand, significant developments have been made in image and video coding for machines. Unfortunately, while there is a substantial body of knowledge regarding rate-distortion theory for human vision, the same cannot be said of machine analysis. In this paper, we greatly extend the current rate-distortion theory for machines, providing insight into important design considerations of machine-vision codecs. We then utilise this newfound understanding to improve several methods for learned image coding for machines. Our proposed methods achieve state-of-the-art rate-distortion performance on several computer vision tasks – classification, instance and semantic segmentation, and object detection. © 2025 IEEE. All rights reserved.

关键词： Semantic Segmentation

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Stimuli-responsive switchable halide perovskites: Taking advantage of instability

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JOULE 2021年第8期5卷 2027-2046页

作者： Zhumekenov, Ayan A. Saidaminov, Makhsud, I Mohammed, Omar F. Bakr, Osman M. King Abdullah Univ Sci & Technol KAUST KAUST Catalysis Ctr KCC Phys Sci & Engn Div Thuwal 239556900 Saudi Arabia Univ Victoria Dept Chem Victoria BC V8P 5C2 Canada Univ Victoria Dept Elect & Comp Engn Victoria BC V8P 5C2 Canada Univ Victoria Ctr Adv Mat & Related Technol CAMTEC Victoria BC V8P 5C2 Canada King Abdullah Univ Sci & Technol KAUST Adv Membranes & Porous Mat Ctr AMPMC Phys Sci & Engn Div Thuwal 239556900 Saudi Arabia Univ Calif Berkeley Dept Chem Berkeley CA 94720 USA

Halide perovskites have recently shown potential as stimuli-responsive materials (SRMs) for a range of important technologies such as smart windows, memory devices, data storage, and sensors. Here, we overview these emerging SRMs that are based on halide perovskite systems of switchable optical and electrical properties as well as discuss their switching characteristics and practical applications. We summarize the reversible chemical and structural transformations of these materials and categorize them by their switching mechanisms. Furthermore, to guide the community's search for new designs of stimuli-responsive halide perovskites, we outline several important criteria for effective switchable materials. Finally, we provide our perspective on the current challenges and future developments of these emerging materials.

关键词： stimuli-responsive switchable perovskite smart materials

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基于AOTF成像光谱仪主动变焦前置光学系统设计

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光学学报 2023年第19期43卷 176-183页

作者：常凌颖王馨幼邱跃洪王冠儒石浩楠梁驰陈奎西安邮电大学电子工程学院陕西西安710121 中国科学院西安光学精密机械研究所西安710119

声光可调协滤波器(AOTF)成像光谱仪可同时获取探测目标的空间图像和光谱信息,具有体积小、质量轻、中心波长挑选灵活等优势。提出一种基于AOTF成像光谱仪组合变焦光学系统设计方案并完成了主动变焦前置光学系统仿真设计。该方案由主反... 详细信息

声光可调协滤波器(AOTF)成像光谱仪可同时获取探测目标的空间图像和光谱信息,具有体积小、质量轻、中心波长挑选灵活等优势。提出一种基于AOTF成像光谱仪组合变焦光学系统设计方案并完成了主动变焦前置光学系统仿真设计。该方案由主反式变焦前置系统和具有任意放大倍数的投影系统组成,可实现大变焦范围主动变焦成像。前置光学系统的初始结构由主反式变焦系统设计理论确定,利用同轴系统的离轴解和参数优化完成离轴三反远心结构的设计和系统像差校正,构建逐步逼近优化法实现主动连续变焦。在Code v中的仿真结果表明:前置变焦系统工作波段为0.5~1.7μm,变焦范围为260~520 mm,短焦处调制传递函数大于0.68@34 lp/mm,长焦处大于0.45@34 lp/mm,全场的均方根半径小于0.345μm,成像质量良好。

关键词：声光可调协滤波器成像光谱仪光学设计组合主动变焦离轴三反像方远心

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Smart design and Implementation of Self Adjusting Robot using Arduino

Smart Design and Implementation of Self Adjusting Robot usin...

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2022 International Conference on Augmented Intelligence and Sustainable Systems, ICAISS 2022

作者： vidhya, R.G. Singh, Kamlesh Paul, P John Sai Srinivas, T. Aditya Prasad Patra, Jyoti Sagar, K.v.Daya HKBK College of Engineering Department of Electronics and Communication Engineering Bangalore India Graphic EraHill University Department of Computer Science Engineering Dehradun Campus Dehradun India Ellenki College of Engineering and Technology Department of Computer Science and Engineering Hyderabad India G Pulla Reddy College of Engineering Department of Computer Science and Engineering Andhra Pradesh Kurnool India Odisha University of Technology and Research Faculty of Electrical OUTR Mahalaxmi ViharGhatikia Techno campus Odisha Bhubaneswar India Koneru Lakshmaiah Education Foundation Department of ECE Guntur Andhrapradesh Vaddeswaram India

ISBN: (纸本)9781665489621

Self-adjusting robots are an excellent approach for keeping up with breakthroughs and developments in advanced mechanics. This idea is based on the basic pendulum theory. A framework goes through a cycle of self-adjustment to reinforce itself from inside. This study intends to overcome the difficulties of stabilizing an unstable structure by supplying the robot with the essential components for self-adjustment and balance. Data from the accelerometer and gyrator are used to compute the robot's accurate three-dimensional location, which is then relayed to a controller. The regulator then uses its own code to legally direct the wheel rotation of the drive module, boosting the robot's stability. This robot has an advantage over others with four wheels since it can spin faster and around obstacles more readily. As a result, it is a necessary tool in many current scenarios. © 2022 IEEE.

关键词： Accelerometers

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Meteorological Observations and Their Instrumental Support at IMCES SB RAS

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ATMOSPHERIC AND OCEANIC OPTICS 2022年第4期35卷 456-466页

作者： Tikhomirov, A. A. Korolkov, v. A. Smirnov, S. v. Azbukin, A. A. Bogushevich, A. Ya. Kalchikhin, v. v. Kobzev, A. A. Kurakov, S. A. Telminov, A. E. Bogomolov, v. Yu. Kabanov, M. M. Kapustin, S. A. Repina, I. A. Pashkin, A. D. Stepanenko, v. M. Russian Acad Sci Siberian Branch Inst Monitoring Climat & Ecol Syst Tomsk 634055 Russia Russian Acad Sci Obukhov Inst Atmospher Phys Moscow 119017 Russia Moscow MV Lomonosov State Univ Moscow 119991 Russia

We present information on the organization and the history of development of meteorological observations at Institute of Monitoring of Climatic and Ecological Systems, Siberian Branch, Russian Academy of Sciences (IMCES), that were initiated at the second category weather station of the Optics Technological design Institute of Scientific Instrument engineering (TDI SIE) (since 1994) and continue to the present at the Geophysical Observatory (GO) of IMCES. A retrospective of the development of meteorological instrument-making at IMCES is presented beginning from the creation of experimental prototypes of automated complexes for operational measurement of optical and meteorological characteristics of the atmosphere (1970s-1980s) during tests of different laser systems to the development and creation of a number of meteorological instruments, including automatic ultrasonic weather stations of different purposes and spatially distributed information and measuring systems on the basis of these stations. Some of the weather stations developed are included in the State Register of Measuring Instruments.

关键词： meteorological observations meteorological instrument ultrasonic weather stations information-measuring system

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Surface and subsurface characteristics of wire-electrical discharge machined Al-alloy and composite: a fundamental study on the role of machining variables

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Journal of Materials Research and Technology 2025年 36卷 9432-9461页

作者： Gaurav Anand Santanu Sardar Satesh Sah Ashim Guha Ibrahim Albaijan Debdulal Das Department of Mechanical Engineering Indian Institute of Engineering Science and Technology Shibpur Howrah 711103 West Bengal India Department of Metallurgy and Materials Engineering Indian Institute of Engineering Science and Technology Shibpur Howrah 711103 West Bengal India Department of Mechanical Engineering College of Engineering in Al-Kharj Prince Sattam Bin Abdulaziz University PO Box 655 Al-Kharj 16273 Saudi Arabia

For hard-to-machine materials like discontinuous particulate reinforced Al-matrix composites, wire-electrical discharge machining (wire-EDM) is increasingly preferred for manufacturing intricately shaped parts with high dimensional accuracies and surface finishes. The wire-EDM process involves a large number of machining variables apart from parameters associated with the workpiece, dielectric, and electrode; therefore, research on wire-EDM is often performed on the basis of the design of experiments , which is somewhat limited the fundamental understanding of the role of various influencing variables. The current experimental research reports the influences of major wire-EDM machining variables on the surface and subsurface characteristics of 20 vol% in-situ Al 3 Fe reinforced Al–2Mg alloy in reference to the unreinforced matrix alloy. The cutting velocity (Cv), kerf width (KW), surface roughness (SR), and surface chemistry (SC, = ΣO + Zn + Cu) of the composite and base alloy have been determined over a wide range of peak current (I P , 70–150 A), pulse-on time (T ON , 5–25 μs), pulse-off time (T OFF , 51–63 μs), servo voltage (S v , 40–80 v), wire feed rate (W FR , 6–10 m min −1 ) and wire tension (WT, 4–12 N), varying one parameter at a time and keeping all others constant at their mid-levels. The surface and subsurface of the wire-EDMed composite and alloy specimens have been extensively characterized employing FESEM coupled with EDS microanalyses, including the change in surface chemistry due to the in-situ oxidation and transfer of elements from the brass wire electrode, while a noncontact optical profilometer has been employed to determine the surface roughness. The Cv, KW, and SR are found to increase monotonically with increasing I P and T ON but decreasing T OFF, while the reverse trend has been observed for SC; these influences are more pronounced for base alloy over composite except for SR. Higher S v diminishes Cv and markedly raises SC; in contrast, en

关键词： Composite WEDM Machining performance Surface integrity Surface chemistry Surface roughness

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Computational modeling of Cs3Sb2I9-based novel architecture under WLED illumination for indoor photovoltaic applications

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optical and Quantum Electronics 2024年第11期56卷 1-17页

作者： Sharma, Rajesh Kumar Keshri, Rishabh Yadav, Shivendra Department of Electronics Engineering Sardar Vallabhbhai National Institute of Technology Surat395007 India Marvell India Pvt. Ltd. Bangalore560103 India

This manuscript presents a comprehensive evaluation of Cs3Sb2I9 (Eg = 1.95 ev) as a potential absorber for indoor photovoltaic (IPv) applications. Using computational modeling, we developed a baseline model of the device structure (FTO/TiO2/Cs3Sb2I9/PolyTPD(poly(N,N'-bis-4-butylphenyl-N,N'-bisphenyl)benzidine)/Au), which experimentally achieved a power conversion efficiency (PCE) of 3.7% under white light-emitting diode (WLED) illumination at 3.2 W m−2 (1000 lx). By increasing the source transmission power density from 3.2 W m−2 (6%) to 53.31 W m−2 (100%), we significantly enhanced the device’s performance. Key parameters such as absorber layer thickness and defect density, along with parameters of the electron transport layer (ETL) and hole transport layer (HTL), were optimized, such as doping concentration, electron affinity (χ), and bandgap (Eg), were optimized. Our simulations demonstrated that the optimized device can achieve a remarkable PCE of 38.77%, with an open-circuit voltage (vOC) of 1.47 v, a short-circuit current density (JSC) of 1.55 mA cm−2, and an excellent fill factor (FF) of 89.09%. Additionally, we proposed a new device architecture, AZO/TNT/Cs3Sb2I9/SrCu2O2/Ni, capable of delivering 38.77% PCE under WLED illumination. This study highlights the critical role of computational modeling in optimizing device design, offering a cost-effective and efficient alternative to experimental methods. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.

关键词： Open circuit voltage

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