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3rd International Conference on Advance Computing and Innovative Technologies in engineering, ICACITE 2023

作者： Chauhan, Birendra Kumar Banupriya, M. Venkatagurunatham, K. Sungheetha, Akey Kumari, Ch D V P Karthick, L. Iimt University School of Basic Sciences and Technology Uttar Pradesh Meerut250001 India Hindustan Institute of Technology Department of Computer Science and Engineering Coimbatore India Andhrapradesh Guntur522019 India Adama Science and Technology University School of Electrical Engineering and Computing Department of Computer Science and Engineering Nazareth1888 Ethiopia Aditya College of Engineering Department of Computer Science and Engineering Andhra Pradesh Surampalem533437 India Hindusthan College of Engineering and Technology Department of Mechanical Engineering Coimbatore641032 India

ISBN: (纸本)9798350399264

Internet of things enabled devices are considered one of the technologies for the future and at the same time, the mass use of IoT devices has revolutionised the way of using modern technology. Hence, with the mass implication creating energy-efficient systems without compromising on the data ratio has become mandatory. Thus, the study collected secondary data and conducted a thematic analysis. Such methods of study have emperors the researchers to collect reliable data and with the discussion create a reliable result. For a better understanding, this study has discussed bout different kinds of routing and helps o create an energy-efficient system with better mobility. The discussion is based on different bandwidths of data along with their use at the same time problem of the system is mentioned at the end. Such a critical discussion allows a reader to prepare their own opinion about a system creation which have an energy-efficient topology and that has improved data packet ratio. © 2023 IEEE.

关键词： Energy efficiency

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Tracing Randomly Oriented Filaments in Cryo-Electron Tomography Maps

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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 915-916页

作者： Sazzed, Salim Scheible, Peter He, Jing Wriggers, Willy Dept. of Computer Science Old Dominion University Norfolk VA United States Dept. of Mechanical & Aerospace Engineering Old Dominion University Norfolk VA United States

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Control Barrier Function-Based Safety Filters: Characterization of Undesired Equilibria, Unbounded Trajectories, and Limit Cycles

arXiv

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arXiv 2025年

作者： Mestres, Pol Chen, Yiting Dall’Anese, Emiliano Cortés, Jorge Department of Mechanical and Aerospace Engineering UC San Diego United States Department of Electrical and Computer Engineering Boston University United States

This paper focuses on "safety filters" designed based on Control Barrier Functions (CBFs): these are modifications of a nominal stabilizing controller typically utilized in safety-critical control applications to render a given subset of states forward invariant. The paper investigates the dynamical properties of the closed-loop systems, with a focus on characterizing undesirable behaviors that may emerge due to the use of CBF-based filters. These undesirable behaviors include unbounded trajectories, limit cycles, and undesired equilibria, which can be locally stable and even form a continuum. Our analysis offer the following contributions: (i) conditions under which trajectories remain bounded and (ii) conditions under which limit cycles do not exist;(iii) we show that undesired equilibria can be characterized by solving an algebraic equation, and (iv) we provide examples that show that asymptotically stable undesired equilibria can exist for a large class of nominal controllers and design parameters of the safety filter (even for convex safe sets). Further, for the specific class of planar systems, (v) we provide explicit formulas for the total number of undesired equilibria and the proportion of saddle points and asymptotically stable equilibria, and (vi) in the case of linear planar systems, we present an exhaustive analysis of their global stability properties. Examples throughout the paper illustrate the results. Copyright © 2025, The Authors. All rights reserved.

关键词： Bandpass filters

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Explainable machine learning for motor fault diagnosis

Explainable machine learning for motor fault diagnosis

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IEEE Instrumentation and Measurement Technology Conference

作者： Yuming Wang Peng Wang Department of Electrical and Computer Engineering University of Kentucky Lexington USA Department of Electrical and Computer Engineering & Department of Mechanical and Aerospace Engineering Lexington USA

Industrial motors have been widely used in various fields such as power generation, mining, and manufacturing. Various motor faults and time-consuming motor maintenance processes will lead to serious economic losses in this context. Different sensing technologies, including acceleration, acoustic, and current sensing can be useful in motor condition monitoring, defect detection, and diagnosis. Regarding sensing data analytics, Machine Learning (ML) and Deep Learning (DL) techniques have been increasingly investigated, because of their promising capabilities in complex data characterization and pattern recognition. However, the explainability of ML and DL models and their decision-making remains a challenge, because of their black-box modeling by nature. Shapley Additive Explanations (SHAP), as a game theoretic approach, provides a way to explain ML and DL modeling results, by allocating credits (known as SHAP values) through local connections to quantify the contributions of input features to model outputs. In this paper, three commonly seen ML techniques, including Support Vector Machine (SVM), Random Forest (RF), and Neural Network (NN) are investigated for vibration-based motor fault diagnosis. Corresponding SHAP explanation methods are applied to the three ML techniques to discover the most important vibration features in detecting motor conditions and differentiating faults. Explanation results from the three ML techniques demonstrate great consensus: average vibration frequency contributes most to motor fault diagnosis. This explanation conclusion matches the physical understanding that fault occurrences would bring in additional frequency components to the spectrum. Improving the physical explainability of ML and DL techniques would significantly improve their credibility and generalizability.

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Design and Implementation of Smart Infrastructures and Connected Vehicles in a MiniCity Platform 27

Design and Implementation of Smart Infrastructures and Conne...

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27th IEEE International Conference on Intelligent Transportation Systems, ITSC 2024

作者： Vargas, Daniel Haque, Ethan Carroll, Matthew Perez, Daniel Roman, Tyler Nguyen, Phong Habibi, Golnaz School of Aerospace and Mechanical Engineering University of Oklahoma 865 Asp Avenue NormanOK United States School of Computer Science University of Oklahoma 110 W Boyd Street NormanOK United States

ISBN: (纸本)9798331505929

This paper presents a 1/10th scale MiniCity platform used as a testing bed for evaluating autonomous and connected vehicles. Using the MiniCity platform, we can evaluate different driving scenarios including human-driven and autonomous driving. We provide a unique, visual feature-rich environment for evaluating computer vision methods. The conducted experiments utilize onboard sensors mounted on a robotic platform we built, allowing them to navigate in a controlled real-world urban environment. The designed city is occupied by cars, stop signs, a variety of residential and business buildings, and complex intersections mimicking an urban area. Furthermore, We have designed an intelligent infrastructure at one of the intersections in the city which helps safer and more efficient navigation in the presence of multiple cars and pedestrians. We have used the MiniCity platform for the analysis of three different applications: city mapping, depth estimation in challenging occluded environments, and smart infrastructure for connected vehicles. Our smart infrastructure is among the first to develop and evaluate Vehicle-to-Infrastructure (V2I) communication at intersections. The intersection-related result shows how inaccuracy in perception, including mapping and localization, can affect safety. The proposed MiniCity platform can be considered as a baseline environment for developing research and education in intelligent transportation systems. © 2024 IEEE.

关键词： Depth perception

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Nano-enhanced biolubricant in sustainable manufacturing:From processability to mechanisms

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Friction 2022年第6期10卷 803-841页

作者： Yanbin ZHANG Hao Nan LI Changhe LI Chuanzhen HUANG Hafiz Muhammad ALI Xuefeng XU Cong MAO Wenfeng DING Xin CUI Min YANG Tianbiao YU Muhammad JAMIL Munish Kumar GUPTA Dongzhou JIA Zafar SAID School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China School of Aerospace University of Nottingham Ningbo ChinaNingbo 315100China School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Key Laboratory of Special Purpose Equipment and Advanced Processing Technology Ministry of Education&Zhejiang ProvinceZhejiang University of TechnologyHangzhou 310032China College of Automotive and Mechanical Engineering Changsha University of Science and TechnologyChangsha 410114China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China School of Mechanical Engineering&Automation Northeastern UniversityShenyang 110006China Industrial Engineering Department University of Engineering and Technology TaxilaTaxila 47080Pakistan School of Mechanical Engineering Shandong UniversityJinan 250061China College of Mechanical Engineering and Automation Liaoning University of TechnologyJinzhou 121001China College of Engineering University of SharjahSharjah 27272United Arab Emirates

To eliminate the negative effect of traditional metal-working fluids and achieve sustainable manufacturing,the usage of nano-enhanced biolubricant(NEBL)is widely researched in minimum quantify lubrication(MQL)***'s improved tool wear and surface integrity have been preliminarily verified by experimental *** previous review papers also concluded the major influencing factors of processability including nano-enhancer and lubricant types,NEBL concentration,micro droplet size,and so ***,the complex action of NEBL,from preparation,atomization,infiltration to heat transfer and anti-friction,is indistinct which limits preparation of process specifications and popularity in *** in the complex machining process,in-depth understanding is difficult and *** fll this gap,this paper concentrates on the comprehensive quantitative assessment of processability based on tribological,thermal,and machined surface quality aspects for NEBL application in turning,milling,and *** it attempts to answer mechanisms systematically considering multi-factor influence of molecular structure,physicochemical properties,concentration,and ***,this paper reveals advanced lubrication and heat transfer mechanisms of NEBL by quantitative comparison with biolubricant-based MQL ***,the distinctive filmformation,atomization,and infiltration mechanisms of NEBL,as distinguished from metal-working fluid,are clarified combining with its unique molecular structure and physical ***,the process optimization strategy is concluded based on the synergistic relationship analysis among process variables,physicochemical properties,machining mechanisms,and performance of ***,the future development directions are put forward aiming at current performance limitations of NEBL,which requires improvement on preparation and jet methods *** paper will help scientists deeply understand effective mec

关键词： nano-enhanced biolubricant(NEBL) sustainable manufacturing minimum quantity lubrication(MQL) tribological properties machining mechanisms

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Streamlining Phantom Tomogram Generation Through Situs and TomoSim Integration

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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 683-684页

作者： Scheible, Peter Sazzed, Salim He, Jing Wriggers, Willy Dept. of Computer Science Old Dominion University Norfolk VA United States Dept. of Mechanical & Aerospace Engineering Old Dominion University Norfolk VA United States

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Technical and economic feasibility assessment for hybrid energy system electricity and hydrogen generation: A case study

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Global Energy Interconnection 2025年第1期8卷 62-81页

作者： Paul C.Okonkwo Samuel Chukwujindu Nwokolo El Manaa Barhoumi Ibrahim B.Mansir Usman Habu Taura Barun Kumar Das Ahmed Bahgat Radwan Wilfred Emori Ephraim Bonah Agyekum Khalid Al Kaaf Mechanical&Mechatronics Engineering Department Dhofar UniversitySalalah 211the Sultanate of Oman Department of Physics Faculty of Physical SciencesUniversity of CalabarCalabar PMB 1115Nigeria Electrical&Computer Engineering Department Dhofar UniversitySalalah 211the Sultanate of Oman Department of Mechanical Engineering Prince Sattam bin Abdulaziz UniversityAl-Kharj 11942Saudi Arabia Centre for Energy Research and Training Ahmadu Bello UniversityPMB 1045ZariaNigeria Oil&Gas Research Center Sultan Qaboos UniversityMuscat 123the Sultanate of Oman Department of Mechanical Engineering Rajshahi University of Engineering&TechnologyRajshahi 6204Bangladesh Center for Advanced Materials Qatar UniversityDoha 2713Qatar School of Materials Science and Engineering Sichuan University of Science and EngineeringZigong 643000PR China Department of Nuclear and Renewable Energy Ural Federal University Named after the First President of Russia BorisEkaterinburg 620002Russia Western Caspian University Baku AZ1001Azerbaijan Department of Civil and Environmental Engineering Dhofar UniversitySalalah 211the Sultanate of Oman

Hydrogen is emerging as a promising alternative to fossil fuels in the transportation *** study evaluated the feasibility of estab-lishing hydrogen refueling stations in five cities in Oman,Duqm,Haima,Sur,Al Buraymi,and Salalah,using Hybrid Optimization of Multiple Electric Renewables(HOMER)*** hybrid energy systems,photovoltaic-wind turbine-battery,photovoltaic-battery,and wind turbine-battery were analyzed for each *** indicated that Duqm offers the lowest net present cost(NPC),levelized cost of energy,and levelized cost of hydrogen,making it the most cost-effective ***,Sensitivity analysis showed that as the life of electrolyzer increases during operation,the initial capital expenditure is distributed over a longer operational period,leading to a reduction in the *** so,renewable energy systems produced no emissions which supports Oman’s mission *** comprehensive analysis confirms the feasibility of establishing a hydrogen refueling station in Duqm,Oman,and highlights advanced optimization techniques’superior capability in designing cost-effective,sustainable energy systems.

关键词： Cities Economic indicator Hydrogen production Optimization Solar

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Symmetry-Guided Reinforcement Learning for Versatile Quadrupedal Gait Generation

arXiv

引用

arXiv 2024年

作者： Ding, Jiayu Chen, Xulin Katz, Garrett E. Gan, Zhenyu Department of Mechanical and Aerospace Engineering Syracuse University SyracuseNY13244 United States Department of Electrical Engineering and Computer Science Syracuse University United States

Quadrupedal robots exhibit a wide range of viable gaits, but generating specific footfall sequences often requires laborious expert tuning of numerous variables, such as touchdown and lift-off events and holonomic constraints for each leg. This paper presents a unified reinforcement learning framework for generating versatile quadrupedal gaits by leveraging the intrinsic symmetries of dynamic legged systems. We propose a symmetry-guided reward function design that incorporates temporal, morphological, and time-reversal symmetries, streamlining gait design, accelerating learning, and enhancing robot agility. By focusing on preserved symmetries and natural dynamics, our approach eliminates the need for predefined trajectories or footfall sequences, enabling smooth transitions between diverse locomotion patterns such as trotting, bounding, half-bounding, and galloping. Implemented on the Petoi Bittle robot, our method demonstrates robust performance across a range of speeds in both simulations and hardware tests, significantly improving gait adaptability without extensive reward tuning or explicit foot placement control. This work provides insights into dynamic locomotion strategies and underscores the crucial role of symmetries in robotic gait design. © 2024, CC BY.

关键词： Machine design

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Appraisal of AlphaFold2-Predicted Models in Cryo-EM Map Interpretation

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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 977-978页

作者： Alshammari, Maytha He, Jing Wriggers, Willy Dept. of Computer Science Old Dominion University Norfolk VA United States Dept. of Mechanical & Aerospace Engineering Old Dominion University Norfolk VA United States

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