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Reachability-Based Confidence-Aware Probabilistic Collision Detection in Highway Driving

engineering 2024年第2期33卷 90-107页

作者： Xinwei Wang Zirui Li Javier Alonso-Mora Meng Wang School of Engineering and Materials Science Queen Mary University of LondonLondon E14NSUK Department of Cognitive Robotics Delft University of TechnologyDelft 2628 CDNetherlands School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Chair of Traffic Process Automation “Friedrich List”Faculty of Transport and Traffic SciencesTU DresdenDresden 01069Germany

Risk assessment is a crucial component of collision warning and avoidance systems for intelligent ***-based formal approaches have been developed to ensure driving safety to accurately detect potential vehicle ***,they suffer from over-conservatism,potentially resulting in false–positive risk events in complicated real-world *** this paper,we combine two reachability analysis techniques,a backward reachable set(BRS)and a stochastic forward reachable set(FRS),and propose an integrated probabilistic collision–detection framework for highway *** this framework,we can first use a BRS to formally check whether a two-vehicle interaction is safe;otherwise,a prediction-based stochastic FRS is employed to estimate the collision probability at each future time ***,the framework can not only identify non-risky events with guaranteed safety but also provide accurate collision risk estimation in safety-critical *** construct the stochastic FRS,we develop a neural network-based acceleration model for surrounding vehicles and further incorporate a confidence-aware dynamic belief to improve the prediction *** experiments were conducted to validate the performance of the acceleration prediction model based on naturalistic highway driving *** efficiency and effectiveness of the framework with infused confidence beliefs were tested in both naturalistic and simulated highway *** proposed risk assessment framework is promising for real-world applications.

关键词： Probabilistic collision detection Confidence awareness Probabilistic acceleration prediction Reachability analysis Risk assessment

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Dynamic Behavior of Levitated Flexible Steel Plate in Bending Electromagnetic Levitation System During Disturbance Input 27

Dynamic Behavior of Levitated Flexible Steel Plate in Bendin...

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27th International Conference on Electrical Machines and Systems, ICEMS 2024

作者： Uchida, Yamato Ogawa, Kazuki Kobayashi, Ikkei Kuroda, Jumpei Uchino, Daigo Ikeda, Keigo Kato, Taro Endo, Ayato Narita, Takayoshi Kato, Hideaki Tokai University Course of Mechanical Engineering Kanagawa Hiratsuka Japan Aichi University of Technology Department of Electronics and Robotics Aichi Gamagori Japan National Institute of Standards and Technology Tokai University Kanagawa Hiratsuka Japan Research of Institute of Science and Technology Tokai University Kanagawa Hiratsuka Japan Numazu National College of Technology Department of Mechanical Engineering Shizuoka Numazu Japan Hokkaido University of Science Department of Mechanical Engineering Hokkaido Sapporo Japan Tokyo University of Technology Department of Mechanical Engineering Hachioji Tokyo Japan Fukuoka Institute of Technology Department of Electrical Engineering Fukuoka Fukuoka Japan Tokai University Department of Mechanical Systems Engineering Kanagawa Hiratsuka Japan

ISBN: (纸本)9784886864406

In thin steel plate production lines, contact conveying by rollers is used, which sometimes results in scratches and plating defects on the steel plate surface. To solve this problem, non-contact conveyance by magnetic levitation is expected. When thin steel plates are magnetically levitated, magnetic levitation control becomes difficult due to deflection caused by the flexibility of the plate. Therefore, we have proposed a curved magnetic levitation system that improves the levitation stability by curving the steel plate for magnetic levitation. However, the dynamic behavior of thin steel plates during bending magnetic levitation have not been clarified. In this report, we performed a levitation experiments of bending steel plate, and input disturbance to the bending levitation device. From the measured response of levitated and oscillated steel plate, it was confirmed that the bending thin steel plate was in rigid body motion due to the disturbance. © 2024 The Institute of Electrical Engineers of Japan.

关键词： Magnetic levitation

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A Eulerian Framework for Modeling and Simulation of Particle Transport during Fuel Dispersal

A Eulerian Framework for Modeling and Simulation of Particle...

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2024 Annual Conference on Transactions of the American Nuclear Society, ANS 2024

作者： Moharana, Avinash Shi, Shanbin Nuclear Engineering Program Department of Mechanical Aerospace and Nuclear Engineering Rensselaer Polytechnic Institute 110 8th Street TroyNY12180 United States

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Degenerate kernels of polyharmonic and poly-Helmholtz operators in polar and spherical coordinates

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engineering Analysis with Boundary Elements 2023年第1期148卷 137-152页

作者： Tsai, Chia-Cheng Hematiyan, M.R. Bachelor Degree Program in Ocean Engineering and Technology National Taiwan Ocean University Keelung202301 Taiwan Center of Excellence for Ocean Engineering National Taiwan Ocean University Keelung202301 Taiwan Department of Mechanical Engineering Shiraz University Shiraz71936 Iran

This paper presents the degenerate kernels for the polyharmonic and poly-Helmholtz partial differential operators in the polar and spherical coordinates. These degenerate kernels are essential if the analytical/semi-analytical solutions and the mathematical degeneracies involving these operators are conducted by the boundary integral equations. In addition, a two-dimensional creeping flow problem is considered to illustrate the use of the degenerate kernels for problems governed by coupled partial differential equations. The coupled governing equations of the creeping flow problems are converted into a biharmonic equation by using the Hörmander linear partial differential operator theory and the Cartesian partial derivatives on the harmonic and biharmonic degenerate kernels are used to obtain the degenerate kernels of two-dimensional creeping flow problems for BIE analyses. Finally, numerical experiments are conducted to study the convergence of the polyharmonic and poly-Helmholtz degenerate kernels. © 2022 Elsevier Ltd

关键词： Boundary integral equations

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Evaluation of an ErgoNomiCs and Human-Automation iNteracTion (ENCHANT) Summer Camp (Evaluation)

Evaluation of an ErgoNomiCs and Human-Automation iNteracTion...

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2024 ASEE Annual Conference and Exposition

作者： Kim, Jin Yong Chen, Szu Tung Hannan, Jacqueline Larson, Hannah Chung, Hyesun Jain, Tisha Fields, Maria Ulin, Sheryl Stirling, Leia Yang, X. Jessie Department of Industrial and Operations Engineering University of Michigan Ann ArborMI United States Department of Robotics University of Michigan Ann ArborMI United States Department of Mechanical Engineering University of Michigan Ann ArborMI United States

To foster inclusivity and increase diversity in Science, Technology, engineering, and Mathematics (STEM) education, ErgoNomiCs and Human-Automation iNteracTion (ENCHANT) summer camp was hosted at the University of Michigan's Industrial and Operations engineering department (IOE). Middle school students were introduced to IOE, Human Factors engineering, and robotics through four 50-minute engaging activity stations: two were specifically developed for outreach activities, and the other two were modified from current research topics. The stations included interactive hands-on activities and discussions around optimization, robotics, trust in automation, and autonomous vehicles. Post-activity evaluation questionnaires revealed that students were excited, engaged, and gained a deeper understanding of the topics covered during each station. By providing an environment where education, exploration, and enjoyment intersected, the camp created a platform for the students to get an insight into the exciting possibilities that industrial engineering holds. More summer camps should be hosted on various engineering topics, to broaden access to hands-on activities that provide enriching learning experiences to diverse student populations and encourage student interest in engineering and related fields. © American Society for engineering Education, 2024.

关键词： Ergonomics

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Design and development of an integrated enset processing machine suitable for central highland farmers of west shewa zone Ethiopia

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Discover Agriculture 2025年第1期3卷 1-26页

作者： Jima, Beka Adugna Kolhe, Kishor Purushottam Jiru, Moera Gutu Agricultural Machinery Engineering Program Department of Mechanical Engineering School of Mechanical Chemical and Materials Engineering at Adama Science and Technology University Adama Ethiopia Department of Mechanical Engineering School of Mechanical Chemical and Materials Engineering at Adama Science and Technology University Adama Ethiopia

The development of Integrated Enset processing technology is significant for the easy availability of stable food in the current condition for fulfilling the pangs of hunger in Ethiopia, currently; individual manual technologies such as decortication, corm granting, bulla extraction, and fermenting techniques eventually contribute to utilizing food security such as Kocho, which is not affordable for the marginal farmers of Ethiopia. However, there is a lack of integrated compromise of the all-function process of corm granting, decortication, and pulverization in one machine wholesome of the product such as Kocho, and bulla within consuming time and labor. Therefore, it is decided to design and develop an integrated enset processing machine for central high land of Ethiopian farmers with high-quality production. The physical and mechanical properties of the enset is studied to get an efficient and robust design of the various components. The overall design and development of proposed machine components were carried out at Adama Science and Technology University, Ethiopia by using ANSYS 2023 R1 software by considering the engineering economics and material specifications as per ASTM standards. The process parameters of the proposed machine are identified as feed rate, drum speed, concave to drum clearance, power requirement, etc. Also, the enset characteristics were considered as decorticating and granting, fiber cutting resistance, fiber length, dimension, shape, and weight. The overall developed enset integrated machine assembles are analyzed for granting and decorticating with drum clearance and bulla extraction throughput capacity, reliability, simplicity, safety, and overall cost. The machine's safety from a Design Perspective is checked and validated by a simulation study on the critical parts subjected to higher stresses. The cost of available individual decorticators, granting, pulverized, and bulla squeezer machines is costly to the farmer’s community. Theref

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Kinematic analysis and geometrical parameters justification of a planetary-type mechanism for actuating an inertial vibration exciter 66

Kinematic analysis and geometrical parameters justification ...

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66th International Conference on Vibroengineering

作者： Korendiy, Vitaliy Parashchyn, Oleh Heletiy, Volodymyr Pasika, Viacheslav Gurey, Volodymyr Maherus, Nadiia Department of Technical Mechanics and Engineering Graphics Lviv Polytechnic National University Lviv Ukraine Department of Robotics and Integrated Mechanical Engineering Technologies Lviv Polytechnic National University Lviv Ukraine

Vibration exciters are of most important units of any vibratory equipment defining its design peculiarities, operational features, functional purpose, and performance characteristics. Among a great variety of vibration exciters, the unbalanced rotors are of the most widely used. The present research considers the possibilities of providing specific motion trajectories of the vibratory machines’ working members with the help of the planetary-type vibration exciter. The methodology of this study is divided into two main stages: deriving motion equations of an unbalanced mass located on a planet gear and analyzing the possibilities of generating rectilinear, elliptical, and circular motion paths by choosing the appropriate geometrical parameters of the planetary gear train. The results of the performed kinematic analysis are presented in the form of the unbalanced mass trajectories, velocities, and accelerations at different design parameters of the planetary-type mechanism. The main scientific novelty of the present study is substantiating the possibilities of using the single-degree-of-freedom planetary-type mechanism for generating the controllable motion trajectories of the unbalanced mass of an inertial vibration exciter. The obtained results can be practically implemented while developing novel adjustable drives for various vibratory equipment, particularly compactors, sieves, screens, and conveyors. Copyright © 2023 Vitaliy Korendiy, et al.

关键词： Equations of motion

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ISLR101: An Iranian Word-Level Sign Language Recognition Dataset

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IEEE Access 2025年 13卷 96147-96158页

作者： Hossein Ranjbar Alireza Taheri Mechanical Engineering Department Social and Cognitive Robotics Laboratory Sharif University of Technology Tehran Iran

Sign language recognition involves modeling complex multichannel information, such as hand shapes and movements, while relying on sufficient sign language-specific data. However, sign languages are often under-resourced, posing a significant challenge for research and development in this field. To address this gap, we introduce ISLR101, the first publicly available Iranian Sign Language dataset for isolated sign language recognition. This comprehensive dataset includes 4,614 videos covering 101 distinct signs, recorded from 10 different signers (3 deaf individuals, 2 sign language interpreters, and 5 L2 learners) against varied backgrounds, with a resolution of $800\times 600$ pixels and a frame rate of 25 frames per second. It also includes skeleton pose information extracted using OpenPose. We establish both a visual appearance-based and a skeleton-based framework as baseline models, thoroughly training and evaluating them on ISLR101. These models achieve 97.01% and 94.02% accuracy on the test set, respectively. Additionally, we publish the train, validation, and test splits to facilitate fair comparisons.

关键词： Sign language Assistive technologies Videos Feature extraction Skeleton Systematic literature review Hands Visualization Hidden Markov models Data mining

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Separation of microalgae from bacterial contaminants using spiral microchannel in the presence of a chemoattractant

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Bioresources and Bioprocessing 2024年第1期11卷 511-525页

作者： Leticia F.Ngum Y.Matsushita Samir F.El-Mashtoly Ahmed M.R.Fath El-Bab Ahmed L Abdel-Mawgood Institute of Basic and Applied Sciences Biotechnology ProgramEgypt-Japan University of Science and TechnologyAlexandria 21934Egypt Institute of Basic and Applied Sciences Nanoscience ProgramEgypt-Japan University of Science and TechnologyAlexandria 21934Egypt Mechatronics and Robotics Engineering Department Egypt-Japan University of Science and TechnologyAlexandria 21934Egypt.

Cell separation using microfluidics has become an effective method to isolate biological contaminants from bodily fluids and cell cultures,such as isolating bacteria contaminants from microalgae cultures and isolating bacteria contaminants from white blood *** this study,bacterial cells were used as a model contaminant in microalgae culture in a passive microfluidics device,which relies on hydrodynamic forces to demonstrate the separation of microalgae from bacteria contaminants in U and W-shaped cross-section spiral microchannel fabricated by defocusing CO_(2) laser *** a flow rate of 0.7 ml/min in the presence of glycine as bacteria chemoattractant,the spiral microfluidics devices with U and W-shaped cross-sections were able to isolate microalgae(Desmodesmus sp.)from bacteria(***)with a high separation efficiency of 92%and 96%*** the same flow rate,in the absence of glycine,the separation efficiency of microalgae for U-and W-shaped cross-sections was 91%and 96%,*** was found that the spiral microchannel device with a W-shaped cross-section with a barrier in the center of the channel showed significantly higher separation *** microchannel chips with U-or W-shaped cross-sections were easy to fabricate and exhibited high *** these advantages,these devices could be widely applicable to other cell separation applications,such as separating circulating tumor cells from blood.

关键词： W-shaped cross-section CO_(2)laser ablation Glycine Separation efficiency Removal ratio

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Numerical Study of Temperature Distribution and CO2 Forming of Gaseous Tangential Firing Furnace with O2 Level Variations in Air Combustion 5th

Numerical Study of Temperature Distribution and CO2 Forming ...

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5th International Conference on mechanical engineering, ICOME 2021

作者： Indrawan, Muhammad Deni Sudarmanta, Bambang Setiyawan, Atok Graduate Program of Mechanical Engineering Institut Teknologi Sepuluh Nopember Surabaya60111 Indonesia Department of Mechanical Engineering Institut Teknologi Sepuluh Nopember Surabaya60111 Indonesia

ISBN: (纸本)9789811908668

Oxyfuel combustion is considered to be one of the most effective methods to improve thermal efficiency for high temperature processes such as boiler water of steam power plant. In the oxyfuel combustion, the combustion characteristics such as temperature and CO2 emission are largely influenced by the process parameters such as the mixing between fuel gas and oxygen and the nitrogen content in the oxidant and fuel. A numerical simulation of 200 MW gaseous tangential firing boiler with varying O2 content 25%, 30%, 35% is presented. Simulations demonstrate the characteristics of temperature distribution and CO2 form rate in the furnace. The results show that by increasing O2 percentage in air combustion there is an increase in temperature level and CO2 forms rate by 6.8% and 13.92% in Oxy25, 16.9% and 15.02% in Oxy30, and 19.14% and 15.72% in Oxy35 compared to airfuel combustion. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Temperature distribution

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