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International Conference on Intelligent Transportation

作者： Minjun Sung Sambhu H. Karumanchi Christophe J. Hiltebrandt-McIntosh Hunmin Kim Naira Hovakimyan Department of Mechanical Science and Engineering Department of Aerospace Engineering University of Illinois at Urbana-Champaign USA Department of Electrical and Computer Engineering Mercer University USA

We present an end-to-end air traffic management framework for Unmanned Aircraft Systems (UAS) operations that is both scalable and robust. Our approach involves defining congestion in the airspace and developing a congestion-based cost map that can mitigate potential congestion while adhering to regulations and guidelines. Each UAS operation leverages a recursively updated cost map in solving the path planning problem, providing scalability of the framework. Additionally, we introduce a time-critical controller to enhance the robustness of mission execution. Empirical evidence confirms the feasibility and effectiveness of our method, achieving significant reductions in both cumulative and maximum levels of airspace congestion.

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Particle Swarm Algorithm-Based Integrated Tax and Finance Control Platform Construction 2

Particle Swarm Algorithm-Based Integrated Tax and Finance Co...

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2nd International Conference on Smart Technologies for Smart Nation, SmartTechCon 2023

作者： Sangeetha, M. Kaliappan, S. Raja, S. Ravichandran, P. Diana, I. Elsie Sagar, B.S. Department of Computer Science and Engineering VSB Engineering College Karur India Department of Electrical and Electronics Engineering Kumaraguru College of Technology Saravanampatti Coimbatore India Department of Mechanical Engineering Sri krishna College of Engineering and Technology Tamilnadu Coimbatore India Department of Mechatronics Engineering Kongu Engineering College Tamil Nadu Erode India Tamilnadu Dindigul624622 India School of Electrical and Electronics Engineering REVA University India

ISBN: (纸本)9798350305418

With the rapid development of modern society, enterprises have also stepped into an era in which the modernization process is accelerating. There are more and more enterprise groups participating in market competition, and the degree of conglomeration is getting deeper and deeper. This trend has led to the scale of the group company. With the continuous expansion, the disconnection between the group's financial work and the group's business and even other links in the group's development process has become a common problem that plagues most enterprise groups. Enterprise groups must face the embarrassing situation of the failure of financial control work. Governance and disclosure of financial status and other aspects are still far from perfect. Some companies have suffered losses, abnormal financial conditions, and even bankruptcy for various reasons, especially because of the outbreak and spread of the financial crisis. The business is in serious financial trouble. On the basis of the particle swarm algorithm, crossover and mutation operations of the genetic algorithm are added to construct the particle swarm genetic hybrid algorithm. Through the example simulation, it can be seen that this method is used to complete the frequency domain design of the control system, which is simpler and more effective than the traditional correction method. Therefore, in this context, how to build a relatively complete financial management and control integration system to ensure the efficient operation of the group's business and the smooth achievement of the overall strategic goal has important research value. By reviewing the research on the integration of financial management and control in academia, it is found that the theoretical community has not given a detailed financial management and control integration system framework. © 2023 IEEE.

关键词： control integration Governance Particle Swarm Algorithm Traditional Genetic Algorithm

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Guaranteed Privacy-Preserving H∞-Optimal Interval Observer Design for Bounded-Error LTI Systems

Guaranteed Privacy-Preserving H∞-Optimal Interval Observer ...

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IEEE Conference on Decision and Control

作者： Mohammad Khajenejad Sonia Martínez Departments of Mechanical Engineering and Electrical and Computer Engineering the University of Tulsa Tulsa OK USA Department of Mechanical and Aerospace Engineering the University of California San Diego San Diego CA USA

ISBN: (数字)9798350316339

ISBN: (纸本)9798350316346

This paper furthers current research into the notion of guaranteed privacy, which provides a deterministic characterization of the privacy of output signals of a dynamical system or mechanism. Unlike stochastic differential privacy, guaranteed privacy offers strict bounds on the proximity between the ranges of two sets of estimated data. Our approach relies on synthesizing an interval observer for a perturbed linear time-invariant (LTI) bounded-error system. The design procedure incorporates a bounded noise perturbation factor computation and observer gains synthesis. Consequently, the observer simultaneously provides guaranteed private and stable interval-valued estimates for a desired variable. We demonstrate the optimality of our design by minimizing the ${\mathcal{H}}_{\infty}$ norm of the observer error system. Furthermore, we assess the accuracy of our proposed mechanism by quantifying the loss incurred when considering guaranteed privacy specifications. Finally, we illustrate the outperformance of the proposed approach to differential privacy through simulations.

关键词： Linear systems Privacy Differential privacy Accuracy Perturbation methods Noise Observers Dynamical systems

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Electrochemical hydrogen-storage capacity of graphene can achieve a carbon-hydrogen atomic ratio of 1:1

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science China Chemistry 2022年第2期65卷 318-321页

作者： Quanfeng He Lanping Zeng Lianhuan Han Juan Peng Matthew M.Sartin Yuan-Zhi Tan Dongping Zhan Zhong-Qun Tian State Key Laboratory of Physical Chemistry of Solid Surfaces Fujian Science&Technology Innovation Laboratory for Energy Materials of ChinaEngineering Research Center of Electrochemical Technologies of Ministry of EducationGraphene Industry and Engineering Research InstituteDepartment of ChemistryCollege of Chemistry and Chemical EngineeringDepartment of Mechanical and Electrical EngineeringSchool of Aerospace EngineeringXiamen UniversityXiamen 361005China Department of Chemistry College of Chemistry and Chemical EngineeringNingxia UniversityYinchuan 750021China

As a promising hydrogen-storage material,graphene is expected to have a theoretical capacity of 7.7 wt%,which means a carbon-hydrogen atomic ratio of 1:***,it has not been demonstrated yet by experiment,and the aim of the *** of Energy is to achieve 5.5 wt%in *** designed a spatially-confined electrochemical system and found that the storage capacity of hydrogen adatoms on single layer graphene(SLG)is as high as 7.3 wt%,which indicates a carbon-hydrogen atomic ratio of 1:1 by considering the sp^(3) defects of ***,SLG was deposited on a large-area polycrystalline platinum(Pt)foil by chemical vapor deposition(CVD);then,a micropipette with reference electrode,counter electrode and electrolyte solution inside was impacted on the SLG/Pt foil(the working electrode)to construct the spatially-confined electrochemical *** SLG-uncovered Pt atoms act as the catalytic sites to convert protons(H^(+))to hydrogen adatoms(H_(ad)),which then spill over and are chemically adsorbed on SLG through surface diffusion during the cathodic *** the electrode processes are reversible,the H_(ad) amount can be measured by the anodic stripping *** is the first experimental evidence for the theoretically expected hydrogen-storage capacity on graphene at ambient environment,especially by using H+rather than hydrogen gas(H_(2))as the hydrogen source,which is of significance for the practical utilization of hydrogen energy.

关键词： graphene hydrogen storage surface electrochemistry adsorption desorption spillover surface diffusion

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Minimum quantity lubrication machining of aeronautical materials using carbon group nanolubricant: From mechanisms to application

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Chinese Journal of Aeronautics 2022年第11期35卷 85-112页

作者： Xin CUI Changhe LI Wenfeng Ding Yun CHEN Cong MAO Xuefeng XU Bo LIU Dazhong WANG Hao Nan LI Yanbin ZHANG Zafar SAID Sujan DEBNATH Muhammad JAMIL Hafiz Muhammad ALI Shubham SHARMA School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Chengdu Tool Research Institute Co. Ltd.Chengdu 610500China College of Automotive and Mechanical Engineering Changsha Universiy of Science and TechnologyChangsha 410ll14China Key Laboratory of Special Purpose Equipment and Advanced Processing Technology Ministry of Education&Zhejiang ProvinceZhejiang University of TechnologyHangzhou 310032China Sichuan Future Aerospace Industry LLC. Shifang 618400China School of Mechanical and Automotive Engineering Shanghai University of Engineering ScienceShanghai 201620China School of Aerospace Universiy of Notingham Ningbo ChinaNingbo 315100China College of Engineering Universityof SharjahSharjah 27272United Arab Emirates Mechanical Engineering Department Curtin UniversityMiri 98009Malaysia Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Department of Mechanical Engineering and Advanced Materials Science Council of Scientific and Industrial Research(CSIR)-Central Leather Research Institute(CLRI)Regional Center for Extension and DevelopmentJalandhar 144021India

It is an inevitable trend of sustainable manufacturing to replace flood and dry machining with minimum quantity lubrication(MQL)***,for aeronautical difficult-tomachine materials,MQL couldn’t meet the high demand of cooling and lubrication due to high heat generation during ***-biolubricants,especially non-toxic carbon group nano-enhancers(CGNs)are used,can solve this technical ***,the machining mechanisms under lubrication of CGNs are unclear at complex interface between tool and workpiece,which characterized by high temperature,pressure,and speed,limited its application in factories and necessitates in-depth *** fill this gap,this study concentrates on the comprehensive quantitative assessment of tribological characteristics based on force,tool wear,chip,and surface integrity in titanium alloy and nickel alloy machining and attempts to answer mechanisms ***,to establish evaluation standard,the cutting mechanisms and performance improvement behavior covering antifriction,antiwear,tool failure,material removal,and surface formation of MQL were ***,the unique film formation and lubrication behaviors of CGNs in MQL turning,milling,and grinding are *** influence law of molecular structure and micromorphology of CGNs was also answered and optimized options were recommended by considering diverse boundary ***,in view of CGNs limitations in MQL,the future development direction is proposed,which needs to be improved in thermal stability of lubricant,activity of CGNs,controllable atomization and transportation methods,and intelligent formation of processing technology solutions.

关键词： aerospace materials Carbon nanoparticles Grinding Lubrication mechanism Milling Minimum quantity lubrication Turning

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Spatially-invariant opinion dynamics on the circle

arXiv

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arXiv 2024年

作者： Amorim, Giovanna Bizyaeva, Anastasia Franci, Alessio Leonard, Naomi Ehrich Mechanical and Aerospace Engineering Princeton University PrincetonNJ08544 United States Sibley School of Mechanical and Aerospace Engineering Cornell University IthacaNY14850 United States Electrical Engineering and Computer Science University of Liege WEL Research Institute Wavre Belgium

We propose and analyze a nonlinear opinion dynamics model for an agent making decisions about a continuous distribution of options in the presence of input. Inspired by perceptual decision-making, we develop new theory for opinion formation in response to inputs about options distributed on the circle. Options on the circle can represent, e.g., the possible directions of perceived objects and resulting heading directions in planar robotic navigation problems. Interactions among options are encoded through a spatially invariant kernel, which we design to ensure that only a small (finite) subset of options can be favored over the continuum. We leverage the spatial invariance of the model linearization to design flexible, distributed opinion-forming behaviors using spatiotemporal frequency domain and bifurcation analysis. We illustrate our model's versatility with an application to robotic navigation in crowded spaces. Copyright © 2024, The Authors. All rights reserved.

关键词： Frequency domain analysis

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Differentiating structure of in situ and ex situ formation of laser-induced graphene hybrids

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Rare Metals 2022年第9期41卷 3035-3044页

作者： Li-Bei Huang Wei-Hua Guo Le Cheng Jian-Jun Su Yun Song Fei-Jun Hu Ying Lo Law Zheng Yan Jian Lin Ru-Quan Ye State Key Laboratory of Marine Pollution Department of ChemistryCity University of Hong KongHong Kong999077China Department of Mechanical and Aerospace Engineering University of MissouriColumbiaMO65211USA Department of Biomedical Biological&Chemical EngineeringUniversity of MissouriColumbiaMO65211USA Department of Electrical Engineering and Computer Science University of MissouriColumbiaMO65211USA City University of Hong Kong Shenzhen Research Institute Shenzhen518057China

Laser-induced graphene(LIG)has been exploited in various fields,such as batteries,water treatment,and flexible actuators and sensors,with the advantages of ease in patternable fabrication and graphene/metal hybrid *** in situ method which includes a single lase step and the ex situ method which uses two lase steps are both widely implemented to synthesize graphene/metal ***,the differences in the structures and properties of the resulting hybrids are not fully ***,we investigate the advantages of ex situ and in situ methods for preparing LIG hybrids using NiFe/LIG as an *** morphology,elemental composition,resistance to strong acid,and application in electrocatalysis and dye adsorption of ex situ and in situ NiFe/LIG hybrids were systematically studied and ***-dispersive X-ray spectrometry(EDS)and vibrating sample magnetometry(VSM)results confirmed the structural differences between the NiFe/LIG *** nanoparticles are mostly wrapped by carbon layers in the in situ NiFe/LIG hybrid,while the ex situ NiFe/LIG hybrid largely exposes the metal *** structural differences are significant for tailoring performance in applications,such as wastewater treatment and *** work provides insights into the synthesis and properties of LIGs and has important implications for future applications.

关键词： Ex situ In situ Laser-induced graphene Metal-containing hybrids Oxygen evolution reaction Dye adsorption

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Design and Deployment of an Autonomous Unmanned Ground Vehicle for Urban Firefighting Scenarios

Field Robotics

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Field Robotics 2025年 1卷 1-17页

作者： Kshitij Jindal Anthony Wang Dinesh Thakur Alex Zhou Vojtech Spurny Viktor Walter George Broughton Tomas Krajnik Martin Saska Giuseppe Loianno Department of Mechanical and Aerospace Engineering New York University New York New York USA Department of Mechanical Engineering and Applied Mechanics University of Pennsylvania Philadelphia Pennsylvania USA Faculty of Electrical Engineering CTU in Prague Prague Czech Republic Department of Electrical and Computer Engineering New York University New York New York USA

Autonomous mobile robots have the potential to execute missions that are either too complex or too dangerous for humans. In this paper, we address the design and deployment of an autonomous ground vehicle equipped with a robotic arm for urban firefighting scenarios. We describe hardware and algorithm designs for autonomous navigation, planning, fire source identification and abatement in unstructured urban scenarios. Our approach employs on-board sensors for autonomous navigation and thermal camera information for source identification. A custom electro-mechanical pump is responsible to eject water for fire abatement. The proposed approach is validated through several experiments, where we show the ability to identify and abate a simulated fire source in a building. The whole system was developed and deployed during the Mohamed Bin Zayed International Robotics Challenge (MBZIRC) 2020, for Challenge 3 — Fire Fighting Inside a High-Rise Building. Our approach was instrumental to win the first place in the MBZIRC Grand Challenge, which included the Challenge 3 as one its three tasks and it scored the highest number of points among all UGV solutions, while being the most compact one among all the teams.

关键词： Robots Cameras Buildings Robot vision systems End effectors Land vehicles Autonomous robots Water pumps Navigation Planning

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RAPUF: A Novel Integration of Reversible Logic and Arbiter Physical Unclonable Functions for Enhancing IoT Security

RAPUF: A Novel Integration of Reversible Logic and Arbiter P...

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2024 International Conference on Artificial Intelligence, computer, Data sciences, and Applications, ACDSA 2024

作者： Rizk, Dominick Rizk, Frederic Rizk, Patrick Rizk, Rodrigue The Catholic University of America Dept. of Electrical Engineering and Computer Science WashingtonDC United States University of Louisiana at Lafayette The Center for Advanced Computer Studies LafayetteLA United States University of Quebec at Trois-Rivières Dept. of Mechanical Engineering Drummondville Canada University of South Dakota Dept. of Computer Science VermillionSD United States

ISBN: (纸本)9798350394528

The Internet of Things (IoT) devices' proliferation underscores the critical importance of fortifying nanoscale circuit security against evolving cyber threats. This paper introduces an unprecedented paradigm to enhance IoT security through the synergistic integration of reversible logic gates and Arbiter Physical Unclonable Functions (APUFs). Reversible logic, known for its theoretical efficiency and energy conservation, is coupled with APUFs, leveraging their unique ability to exploit nanoscale manufacturing variations for robust hardware security. The novel integration is specifically tailored to address the distinctive security challenges prevalent in IoT ecosystems. The proposed methodology encompasses designing and implementing a secure nanoscale circuit system, tailored to the resource constraints of IoT devices. Through an exhaustive literature review, we establish the significance of reversible logic and APUFs in the broader context of nanoscale circuit design and IoT security. The experimental results demonstrate not only the feasibility of the integrated approach but also its effectiveness in fortifying IoT devices against unauthorized access and data breaches. This research contributes a fresh perspective to the field of IoT security, presenting a novel solution that combines energy-efficient reversible logic with the intrinsic security features of APUFs. The outcomes of this work hold promise for advancing the security paradigm of IoT devices ensuring their resilience against emerging threats in the ever-evolving landscape of cybersecurity and contributing significantly to the evolving field of quantum-enhanced IoT security. © 2024 IEEE.

关键词： Internet of things

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High-Fidelity CFD Verification Workshop 2024: Shock-Dominated Flows

High-Fidelity CFD Verification Workshop 2024: Shock-Dominate...

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AIAA Aviation Forum and ASCEND, 2024

作者： Huang, Tianci Zahr, Matthew J. Holst, Kevin Freels, James D. Baker, A.J. Batten, Paul Bachchan, Nili Brad Maeng, Jungyeoul Fisher, Travis C. Kim, Dongseok Yune, Kyeol Kim, Chongam Kim, Juhyun Park, Jaehyeon Jee, Solkeun White, William J. Johnsen, Eric Department of Aerospace and Mechanical Engineering University of Notre Dame Notre DameIN46556-5637 United States Department of Electrical Engineering and Computer Science University of Tennessee KnoxvilleTN37996 United States Department of Mechanical Aerospace and Biomedical Engineering University of Tennessee KnoxvilleTN37996 United States Metacomp Technologies Inc. 31365 Oak Crest Drive #250 Westlake Village CA91361 United States Computational Thermal and Fluid Mechanics Sandia National Laboratories AlbuquerqueNM87185 United States Department of Aerospace Engineering Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of Department of Aerospace System Engineering Sejong University Neungdong-ro Gwangjin-gu Seoul05006 Korea Republic of School of Mechanical Engineering Gwangju Institute of Science and Technology 123 Cheomdan-gwagi-ro Kuk-gu Gwangju61005 Korea Republic of University of Michigan Ann ArborMI48109 United States

This manuscript presents the test problems and results of the shock-dominated flow test suite of the first High-Fidelity CFD Verification Workshop held on January 6-7, 2024. © 2024, American Institute of Aeronaut... 详细信息

ISBN: (纸本)9781624107160

关键词： Shock testing

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