检索结果-内蒙古大学图书馆

Latin American Electron Devices Conference (LAEDC)

作者： A. X. Gonzalez-Cely C.F. Blanco-Díaz Camilo A.R. Díaz T. Bastos-Filho Robotics and Assistive Technology Laboratory Postgraduate Program in Electrical Engineering Federal University of Espírito Santo Vitoria Brazil Telecommunications Laboratory Postgraduate Program in Electrical Engineering Federal University of Espírito Santo Vitoria Brazil

ISBN: (数字)9798350361292

ISBN: (纸本)9798350361308

A real-time implementation of a classification system is proposed here to operate an electric-powered wheelchair. The proposed framework innovatively integrates Polymeric Optical Fiber (POF)-based pressure sensors, positioned within a neck pillow, to effectively capture critical user-specific pressure data emanating from the user’s neck region. The system considered the mechanical variations presented in the dataset construction owing to the movement generated by the wheelchair. To mitigate this inherent noise, an indispensable preprocessing stage is introduced, and a feature extraction stage is performed considering the variance, Root Mean Square (RMS), Crest Factor Margin (CMF), and Margin Factor (MF) in the time domain. This augmentation enhances the discriminative capacity of the feature representation and, consequently, enhances the classification performance. A fine k-Nearest Neighbors (kNN) was able to distinguish four neck movements: forward, right, left, and back, with performance metrics of: 80.39% (Accuracy), 87.09% (AUC), and 19.40% (False Positive Rate). This work contributes to the development of new strategies for the implementation of more robust power wheelchair controllers by integrating machine learning and optical fiber sensors, in order to assist people with disabilities.

关键词： Pressure sensors Optical fiber sensors Accuracy Wheelchairs Neck Classification algorithms Polymers

来源：评论

学校读者我要写书评

暂无评论

Optimizing Methylammonium Tin Iodide-based Perovskite Solar Cells with Different Hole Transport Materials

Optimizing Methylammonium Tin Iodide-based Perovskite Solar ...

引用

IEEE International Conference on Semiconductor Electronics (ICSE)

作者： Budi Mulyanti Jahril Nur Fauzan Chandra Wulandari Lilik Hasanah Roer Eka Pawinanto Study Program of Electrical Engineering Universitas Pendidikan Indonesia Bandung Indonesia Study Program of Electrical Engineering Education Universitas Pendidikan Indonesia Bandung Indonesia Study Program of Physics Institut Teknologi Bandung Bandung Indonesia Study Program of Physics Universitas Pendidikan Indonesia Bandung Indonesia Study Program of Industrial Automation and Robotics Engineering Education Universitas Pendidikan Indonesia Bandung Indonesia

ISBN: (数字)9798350378313

ISBN: (纸本)9798350378320

Perovskite materials have garnered significant attention in the field of solar cell applications due to their highly promising performance. However, the utilization of lead (Pb) as the primary material in perovskite solar cells has been associated to health and environmental hazards. Consequently an alternative material for lead is necessary in order to develop environmentally friendly and high-efficiency solar cells. The reported efficiency value still necessitates further enhancement, indicating that the development of lead-free solar cells requires improvement. Methylammonium tin iodide (MaSnI 3 ), a lead-free perovskite compound, can be utilized as a substitute for lead halide-based solar cells. This substitution is possible since MaSnI 3 is stable, non-toxic, and has a high efficiency. The simulation was conducted by the Solar Cell Capacitance Simulator (SCAPS-1D), employing the AM 1.5G spectrum. The primary objective of this research is to enhance the performance of the hole transport layer materials in order to achieve a high power conversion efficiency (PCE) using MaSnI 3 material. Organic and inorganic HTL such as CuSBS, PEDOT:PSS+WO 3 , Spiro-OMeTAD, P3HT, NiO, Cul, SrCu 2 O 2 and PTAA are required in our simulations. These materials were selected to explore their potential in optimizing device performance due to their distinct properties, such as conductivity, stability, and compatibility with MaSnI3. Regarding HTM performance for device construction, our modelling results indicate that the 100 nm CuSBS 2 layer works better. We have found that by using the configuration of ITO/TIO 2 /MASnI 3 /CuSBS 2 /Au, a PCE of 27.67% with a Voc of 0.97 V can be achieved.

关键词： Performance evaluation Semiconductor device modeling Photovoltaic cells Lead Tin Perovskites Stability analysis

来源：评论

学校读者我要写书评

暂无评论

Machine Learning Algorithms for Natural Language Processing Tasks: A Case of COVID-19 Twitter data (Thailand)

Machine Learning Algorithms for Natural Language Processing ...

引用

2022 International Conference on Computational Science and Computational Intelligence, CSCI 2022

作者： Kularbphettong, Kunyanuth Vichivanives, Rujijan Kanjanaprakarn, Pannawat Chutrtong, Jaruwan Ruksuntorn, Nareenart Suan Sunandha Rajabhat University Computer Science Program Bangkok Thailand Suan Sunandha Rajabhat University Faculty of Science and Technology Bangkok Thailand Suan Sunandha Rajabhat University Robotics Engineering Program Faculty of Industrial Technology Bangkok Thailand

ISBN: (纸本)9798350320282

This paper presents the use of natural language processing for the problem of information extraction and sentiment analysis. The dataset is from Twitter that has the information of people mentioning about COVID-19, this study has two tasks: (i) classification approach for information extraction task and (ii) deep learning approach for sentiment analysis task. In information extraction task, the data was gathered from twitter that related to COVID-19 information, and the sequence labelling method applied to classify text before giving it to classification algorithms (K-NN, Naïve Bayes, Decision Tree, Random Forest, and SVM). In sentiment analysis task, data was classified by convert the word into index and using word embedding, then to process deep learning algorithm (Bi-directional GRU). The accuracy of two tasks are 98% and 79% respectively. © 2022 IEEE.

关键词： COVID-19

来源：评论

学校读者我要写书评

暂无评论

Docking Assistance System Between Trailer and Tractor Using UWB Measuring Module

引用

Journal of Institute of Control, robotics and Systems 2024年第1期30卷 59-65页

作者： Park, Jong Hak Heo, Jeong Woong Moon, Hee Chang Industrial Convergence Interdepartmental Program Autonomous Vehicle･Intelligent Robotics The Graduate School of Hongik University Korea Republic of Mechanical and System Design Engineering Hongik University Korea Republic of

Trailers, which are used to load equipment such as containers and construction materials, are towed by the power of tractors to transport the equipment. The tractor, the towing vehicle, and the trailer, the towed vehicle, are independent systems, and the tractor can combine and separate by replacing the trailer for various purposes. To dock the trailer and tractor, the tractor should be backward with the posture and position of the rear of the tractor in line with the front of the trailer. The tractor driver shall be mounted based on the driver’s cognitive judgment, with a rear-view camera and mirror to determine the matching position of the trailer. We implemented and explored a system that could determine the length of this combination of systems using UWB, a positioning system, rather than driver recognition judgment, and used it to determine the position and posture of the trailer reference tractor using a square geometric approach. © ICROS 2024.

关键词： Light trailers

来源：评论

学校读者我要写书评

暂无评论

Development of a Lightweight Real-Time Application for Dynamic Hand Gesture Recognition

Development of a Lightweight Real-Time Application for Dynam...

引用

IEEE International Conference on Mechatronics and Automation

作者： Oluwaleke Yusuf Maki Habib Department of Mechanical Engineering Robotics Control and Smart Systems (RCSS) Program The American University in Cairo (AUC) Cairo Egypt

Hand Gesture Recognition (HGR) is a form of perceptual computing with applications in human-machine interaction, virtual/augmented reality, and human behavior analysis. Within the HGR domain, several frameworks have been developed with different combinations of input modalities and network architectures with varying levels of efficacy. Such frameworks maximized performance at the expense of increased hardware and computational requirements. These drawbacks can be tackled by transforming the relatively complex dynamic hand gesture recognition task into a simpler image classification task. This paper presents a skeleton-based HGR framework that implements data-level fusion for encoding spatiotemporal information from dynamic gestures into static representational images. Said static images are subsequently processed by a custom, end-to-end trainable multi-stream CNN architecture for gesture classification. Our framework reduces the hardware and computational requirements of the HGR task while remaining competitive with the state-of-the-art on the CNR, FPHA, LMDHG, SHREC2017, and DHG142S benchmark datasets. We demonstrated the practical utility of our framework by creating a lightweight real-time application that makes use of skeleton data extracted from RGB video streams captured by a standard inbuilt PC webcam. The application operates successfully with minimal CPU and RAM footprint while achieving 93.46% classification accuracy with approximately 2s latency at 15 frames per second.

关键词：

来源：评论

学校读者我要写书评

暂无评论

How Fast Can a Robotic Drummer Beat Using Dielectric Elastomer Actuators?

引用

IEEE robotics and Automation Letters 2024年第3期9卷 2638-2645页

作者： Wakle, Sudhir Lin, Tse-Han Huang, Shu Basu, Sumit Lau, Gih-Keong National Yang Ming Chiao Tung University International College of Semiconductor Technology Hsinchu30010 Taiwan Indian Institute of Technology Kanpur Mechanical Engineering Department Kanpur208016 India National Yang Ming Chiao Tung University Department of Graduate Degree Program of Robotics Hsinchu30010 Taiwan Industrial Technology Research Institute Mechanical and Mechatronics System Research Labs Zhudong 31057 Taiwan National Yang Ming Chiao Tung University Department of Mechanical Engineering International College of Semiconductor Technology Hsinchu30010 Taiwan

Fast drumming presents a speed challenge to many robotic arms. To simultaneously meet the needs for speed, stroke, and force, we proposed and tested a new double-saddle dielectric elastomer actuator (DEA) as the artificial biceps for driving a lightweight robotic drummer. This work finds that fast force induction is instrumental to the fast drumming by a DEA-driven drumstick. While a pure-shear series of DEA under a large pre-stretch and lateral reinforcement can generate a large isotonic stroke, it is not fast in isometric force induction. Instead, this work found a double-saddle DEA, which is a degenerated two-segment pure-shear DEA with a middle laterally buckled beam, managed to induce a faster isometric force at a 0.5 s down time constant when its ultimate actuation tapered due to substantial strain stiffening effect. As such, this double-saddle DEA-driven drummer suffered less from the dynamic stroke decrement than the 8-segment DEA did. A 4.4 g DEA managed to swing freely a 7.8 g drumstick up to nearly 60° at 6 kV and a maximum tip speed of up to 0.45 m/s. The drumming frequency upon 5.5 kV activation was up to 2-2.5 Hz. In comparison, an 8-segment pure-shear DEA-driven drummer failed to reach the drum when pulsed at 2 Hz. Interestingly, a slower stroke excited multiple drumbeats due to secondary bounces. To achieve a faster drumming to match a human drummer, it is foreseen that a harder dielectric elastomer material will help drive a faster soft robot. © 2016 IEEE.

关键词： Dielectric materials

来源：评论

学校读者我要写书评

暂无评论

Design and Validation of a Prosthetic Foot Adaptable to Sagittal Plane Ground Irregularity

Design and Validation of a Prosthetic Foot Adaptable to Sagi...

引用

3D Analysis of Human Movement (3DAHM), International Symposium on

作者： Marco Lagones Victoria E. Abarca Dante A. Elias Biomedical Engineering Program Pontificia Universidad Católica del Perú Biomedical Engineering Program Universidad Peruana Cayetano Heredia Lima Peru Biomechanics and Applied Robotics Research Laboratory Pontificia Universidad Católica del Perú Lima Peru

ISBN: (数字)9798331521738

ISBN: (纸本)9798331509842

Amputation involves the removal of a limb or part of it. In the case of the lower extremity, amputation affects the ankle joint and the metatarsophalangeal and intertarsal joints, improving the foot's adaptability on uneven terrain. Therefore, based on state-of-the-art technology that does not address the other joints of the foot to a large extent, a prosthetic foot has been developed that integrates the support structure of the foot through a foot arch with an extension analogous to the forefoot and an elastic element that mimics the plantar fascia that deforms against obstacles and provides stability to the prosthetic arch foot. The work addresses the design of the prosthetic foot from its design to its prototyping and validation, where the foot was shown to withstand the loads recommended for the P5 category of the ISO 22675 standard and to provide a return energy equal to 95.72%, 77.13%, and 90.21 %, in the heel strike, mid-stance, and toe-off stages, respectively. In addition to showing linear stiffness properties (66.95 kN /m) and torsional stiffness properties(2.05 kN.m/rad) in the forefoot analog element, values that are comparable with those recorded in commercial tests such as LP Variflex categories 7 and 8.

关键词： Three-dimensional displays Protocols Prototypes Amputation Stability analysis Standards Foot Prosthetics Load modeling Testing

来源：评论

学校读者我要写书评

暂无评论

AI Fairness-From Machine Learning to Federated Learning

引用

Computer Modeling in engineering & Sciences 2024年第5期139卷 1203-1215页

作者： Lalit Mohan Patnaik Wenfeng Wang Consciousness Studies Program School of HumanitiesNational Institute of Advanced StudiesBangalore560012India Research Institute of Intelligent Engineering and Data Applications Shanghai Institute of TechnologyShanghai201418China Research Center of Ecology and Environment of Central Asia Chinese Academy of SciencesUrumqi830011China Applied Nonlinear Science Lab Anand International College of EngineeringJaipur391320India London Institute of Technology The ASE-London CTI of SCOLondonCR26EQUK Sino-Indian Joint Research Center of AI and Robotics The IMT InstituteBhubaneswar752054India

This article reviews the theory of fairness in AI-frommachine learning to federated learning,where the constraints on precision AI fairness and perspective solutions are also *** a reliable and quantitative evaluation of AI fairness,many associated concepts have been proposed,formulated and ***,the inexplicability of machine learning systems makes it almost impossible to include all necessary details in the modelling stage to ensure *** privacy worries induce the data unfairness and hence,the biases in the datasets for evaluating AI fairness are *** imbalance between algorithms’utility and humanization has further reinforced *** for federated learning systems,these constraints on precision AI fairness still *** solution is to reconcile the federated learning processes and reduce biases and imbalances accordingly.

关键词： Formulation evaluation classification constraints imbalance biases

来源：评论

学校读者我要写书评

暂无评论

Development of Perching and Fail-Safe Module for Wall Climbing Multi-copter 10th

Development of Perching and Fail-Safe Module for Wall Cli...

引用

10th International Conference on Robot Intelligence Technology and Applications, RiTA 2022

作者： Kim, Taewan Tirtawardhana, Christian Yu, Byeongho Nahrendra, I. Made Aswin Kim, Seoktae Myung, Hyun Robotics Program Korea Advanced Institute of Science and Technology Daejeon34141 Korea Republic of School of Electrical Engineering Korea Advanced Institute of Science and Technology Daejeon34141 Korea Republic of KEPCO RI Korea Electric Power Corporation Daejeon34056 Korea Republic of

ISBN: (纸本)9783031268885

In recent years, various researches using UAVs (Unmanned Aerial Vehicles), especially multi-copter in various tasks, have been conducted due to their high mobility. Various perching mechanisms to perch the multi-copter onto the surface were developed for energy efficiency and to ensure safety while doing its tasks. However, developing mechanisms for multi-copter has limitations, such as limited payload. In this paper, we propose the perching and fail-safe module for the wall-climbing aerial robot "CAROS-Q" which can tilt its pose to perch on tilted surfaces. The proposed module consists of a passive perching mechanism with a specially designed suction cup to perch onto the surface safely, and a fail-safe mechanism to prevent falling from unexpected accidents. The prototype verifies the performance of the proposed module. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Energy efficiency

来源：评论

学校读者我要写书评

暂无评论

Unified Editing of Panorama, 3D Scenes, and Videos Through Disentangled Self-Attention Injection

arXiv

引用

arXiv 2024年

作者： Kwon, Gihyun Park, Jangho Ye, Jong Chul Kim Jaechul Graduate School of AI KAIST Korea Republic of Department of Bio and Brain Engineering KAIST Korea Republic of Robotics Program KAIST Korea Republic of

While text-to-image models have achieved impressive capabilities in image generation and editing, their application across various modalities often necessitates training separate models. Inspired by existing method of single image editing with self attention injection and video editing with shared attention, we propose a novel unified editing framework that combines the strengths of both approaches by utilizing only a basic 2D image text-to-image (T2I) diffusion model. Specifically, we design a sampling method that facilitates editing consecutive images while maintaining semantic consistency utilizing shared self-attention features during both reference and consecutive image sampling processes. Experimental results confirm that our method enables editing across diverse modalities including 3D scenes, videos, and panorama images. © 2024, CC BY.

关键词： Semantics

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：