检索结果-内蒙古大学图书馆

SSRN 2023年

作者： He, Chunmei Fan, Xianjun Zhou, Kang Ye, Zhengchun School of Computer Science School of Cyberspace Science Xiangtan University Hunan Xiangtan411105 China School of Mechanical Engineering Xiangtan University Hunan Xiangtan411105 China

Unsupervised domain adaptation (UDA) trains models using labeled data from a specific source domain and then transferring the knowledge to certain target domains that have few or no labels. Many prior measurement-based works achieve lots of progress, but they don’t consider negative transfer of the outlier sample in source domain, use the same measurement in both source domain and target domain and do not adequately evaluate the margin loss of samples in target domain. We address these issues in our work and propose an UDA method with asymmetrical margin disparity loss and outlier sample extraction, called AMD-Net with OSE. We first design different disparity losses for source and target domain where we use the marginal disparity loss for source domain and define multi-label margin disparity loss for target domain. We further define the certainty degree to describe the degree of sample confusion and divide the target domain samples into high certainty samples and low certainty samples. We design sample certainty selection to assign different disparity losses for different samples according to the sample certainty degree. We assign the multi-label margin disparity loss for the target domain samples with low sample certainty and the cross-entropy loss is provided for target domain samples with high certainty. We further propose an outlier sample extraction algorithm (OSE) based on weighted cosine similarity distance for source domain. Extensive experiments on three datasets Office-31, Office-Home and VisDA-2017 demonstrate that our method works well in various UDA settings and outperforms the state-of-the-art methods. © 2023, The Authors. All rights reserved.

关键词： Image classification

来源：评论

学校读者我要写书评

暂无评论

A Single-legged Robot Inspired by the Jumping Mechanism of Click Beetles and Its Hopping Dynamics Analysis

引用

Journal of Bionic engineering 2020年第6期17卷 1109-1125页

作者： Gang Chen Jiajun Tu Xiaocong Ti Huosheng Hu Faculty of Mechanical Engineering and Automation Zhejiang Sci-Tech UniversityHangzhou 310018China School of Computer Science and Electronic Engineering University of EssexColchester C043SQUK

The click beetle can jump up with a hinge when it is on the dorsal *** jumping mechanism is simple and suitable as an inspiration for designing a simple,small,and reliable hopping *** report a single-legged robot inspired by the jumping mechanism of click *** is 85 mm high,60 mm long,and 41 mm wide,and weighs about 49 *** robot has good hopping performance that the hopping height is about 4 times-4.3 times of its body *** is capable for rescue missions that require to enter enclosed spaces through cracks and narrow *** addition,hopping dynamics of the robot is important to understand its jumping mechanism and improve the robot’s hopping *** existing dynamic study does not complete the analysis including all stages in the hopping which are pre-hopping,take-off,and *** propose the decomposition method to study dynamics of the three stages separately,and synthesize them with related *** dynamic synthesis of multi-motion states in a hopping cycle of the single-legged hopping robot is *** hopping performance and dynamic synthesis theory of the robot are verified by simulations and *** study helps lay the foundation for design and hopping control of simple hopping robot systems.

关键词： single-legged hopping robots hopping cycle dynamics synthesis multi-motion states jumping mechanism imitaion of click beetles

来源：评论

学校读者我要写书评

暂无评论

Design and Evaluation of IoT Prototypes: Leveraging Test-Beds for Performance Assessment and Innovation

Design and Evaluation of IoT Prototypes: Leveraging Test-Bed...

引用

Computational, Communication and Information Technology (ICCCIT), International Conference on

作者： Arnav Kotiyal Anurag Shrivastava Amandeep Nagpal Manjunatha Krishna Kant Dixit R. Akhilesh Reddy Department of Computer Science & Engineering Graphic Era Deemed to be University Dehradun Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Chennai Tamilnadu Lovely Professional University Phagwara India Department of Mechanical Engineering New Horizon College of Engineering Bangalore Department of Electrical Engineering GLA University Mathura India Department of CSE-AI&ML MLR Institute of Technology Hyderabad Telangana

ISBN: (数字)9798331512965

ISBN: (纸本)9798331512972

When you mention the Internet of things (IoT), connected devices and systems can be made seamless. Whilst creating and prototyping IoTs are oftentimes necessary, design, testing and evaluating IoT prototypes require robust frameworks and methodologies to achieve reliable performance and innovation. In this paper, test beds as controlled environments for performance assessment of IoT prototypes are discussed and these tested in terms of design and evaluation. Of importance are test-beds as they aid in simulating real world conditions to do iterative improvements, and foster innovation in IoT solutions. It presents some key methodologies for developing IoT prototypes, underlines the role of test beds in the validation process, and reports about evaluation of some case studies demonstrating the impact of such frameworks on alleviating inefficiency, unreliability, and non-scalability. The paper combines leading edge technologies with strong data driven decision making to present actionable feedback on exploiting test beds to catalyse IoT innovation against pivotal challenges including interoperability, security, and scalability.

关键词： Performance evaluation Technological innovation Scalability Prototypes Packet loss Reliability engineering Throughput Real-time systems Internet of Things Edge computing

来源：评论

学校读者我要写书评

暂无评论

Research on Optimizing of circularity and Surface Roughness for Turn-Mill Multitasking Machining

Research on Optimizing of circularity and Surface Roughness ...

引用

International Conference on System science and engineering (ICSSE)

作者： Wei-Tai Huang Ze-Qi Chen Jyh-Horng Chou Department of mechanical engineering National Pingtung University of Science and Technology Pingtung Taiwan Department of Mechanical and Computer-Aided Engineering Feng Chia University Taichung Taiwan

ISBN: (数字)9781665488525

ISBN: (纸本)9781665488532

In this study, Taguchi’s robust process design optimizes the turning and milling combined processing. The quality characteristics are surface roughness and circularity. The experiment uses the $L 9\left(3^{4}\right)$ orthogonal table to find the parameters optimized for a target. The control factors used are tool speed (r.p.m.), axial depth of cut (mm), finishing allowance (mm), and C-axis brake pressure $\left(\mathrm{kg} / \mathrm{cm}^{2}\right)$, with roughness and circularity as characteristic targets, analyze and calculate the obtained signal-to-noise ratio (S/N) data to obtain the optimization of quality characteristics. The experimental results show that the optimized surface roughness of quality characteristics is $0.473 \mathrm{~mm}$, and the optimized parameters are Al (5001pm), B2 $(2 \mathrm{~mm}), \mathrm{Cl}(0.6 \mathrm{~mm})$, and D1 $\left(20 \mathrm{~kg} / \mathrm{cm}^{2}\right)$. The circularity is $0.0003 \mathrm{~mm}$, and the optimized parameters are $A 3$ (900r.p.m.), B1 (1mm), C3 (1.4mm) and D2 $\left(25 \mathrm{~kg} / \mathrm{cm}^{2}\right)$. After optimization experiments, the circularity has increased by 67 %, and the surface roughness has increased by 28.8 %. It is also known that a higher tool speed will increase the cutting speed and the tool wear will be relatively greater. After comparing the tool wear of the two characteristic targets, it is found that the tool wear difference of the circularity is $0.039 \mathrm{~mm}$, which is an increase of 59 %. The tool wear difference of the surface roughness is $0.025 \mathrm{~mm}$, an increase of 39 %.

关键词： Process design Machining Milling Multitasking Turning Surface roughness Rough surfaces

来源：评论

学校读者我要写书评

暂无评论

Multi-source Data-driven Procedure for Traffic Analysis Zones Definition

Multi-source Data-driven Procedure for Traffic Analysis Zone...

引用

International Conference on Models and Technologies for Intelligent Transportation Systems (MT-ITS)

作者： Marisdea Castiglione Marialisa Nigro Nicola Sacco Dept. of Civil Computer Science and Aeronautical Technologies Engineering Roma Tre University Rome Italy Dept. of Mechanical Energy Management and Transportation Engineering University of Genoa Genoa Italy

The choice of an appropriate Traffic Analysis Zones (TAZ) system is a critical step of travel demand modeling which is often overlooked. Studies have approached this process as an optimization problem aiming to maximize the homogeneity of socio-economic and geographic characteristics of zones while minimizing, at the same time, the number of intrazonal trips. However, beyond the application of general guidelines and individual experience to specific case studies, the definition of a formal approach is still an unsolved issue. Nevertheless, the rapid ICT development and novel big data sources allow to enhance traditional models by exploiting additional land-use and spatio-temporal mobility features. This paper illustrates a multi-source data-driven method for an automatic TAZ definition procedure which aims to minimize the number of intrazonal trips. With the proposed approach, Floating Car Data (FCD) can be suitably paired with the TAZs in order to define the best configuration of origin/destination zones that can be directly used in travel demand forecasting models. The procedure is applied to the EUR district of the city of Rome (Italy), starting from a regular hexagonal division of the study area consisting of 161 zones, using data from an FCD dataset containing more than 1.500.000 trips carried out between September and December 2020.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Developing Role Model of PV Powered Battery Swapping Stations for e-scooters in Urban Regions 7

Developing Role Model of PV Powered Battery Swapping Station...

引用

7th International Conference on Environment Friendly Energies and Applications, EFEA 2022

作者： Rohde, Robin Belea, Alexandru Seibert, Magdalena Gielen, Orin Abdelalim, Abdelrahman M. Ashok, B. Farrag, Mohamed Emad School of Computing Engineering and Built Environment Glasgow Caledonian University GlasgowG40BA United Kingdom School of Information Technology and Computer Science Nile University Giza12677 Egypt School of Mechanical Engineering Vellore Institute of Technology Tamil Nadu Vellore632014 India

ISBN: (纸本)9798350333213

Electric vehicles (EVs) can only provide lower carbon emissions than conventional, internal combustion-powered vehicles if they are charged using green energy. They also have the drawback of long charging times to 'refuel' them. To combat these two problems, a solar-powered battery charging and swapping station was developed using centered-human design and systems engineering. The design focuses on electric two-wheeled vehicles (e-scooters) due to the easier handling of their light and low-capacity batteries compared to electric cars. These stations are easy to maintain and manage and can be run by low-income individuals to provide them with a business opportunity. The stations are designed to run independently from the electrical grid and thus be deployed in areas with less sophisticated infrastructure to achieve lower carbon emissions. A based-Mobile application was also designed to identify the next available station with the same battery rating. The project outcome is found reliable in developing economically, ecologically, and socially sustainable services for most needing communities. © 2022 IEEE.

关键词： Charging (batteries)

来源：评论

学校读者我要写书评

暂无评论

EMaGer: A Wearable Full-Circumference HD-EMG Sensor and Data Augmentation Method for Robust Hand Gesture Recognition

EMaGer: A Wearable Full-Circumference HD-EMG Sensor and Data...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Félix Chamberland Étienne Buteau Simon Tam Paul Fortier Mounir Boukadoum Alexandre Campeau-Lecours Benoit Gosselin Department of Electrical and Computer Engineering Université Laval Québec Canada Department of Computer Science Université du Qutébec à Montréal Montréal Canada Department of Mechanical Engineering Université Laval Québec Canada

This work presents EMaGer, a new 360° 64-channel high-density electromyography (HD-EMG) bracelet combined with an original data augmentation method for improved robustness in gesture recognition. By leveraging homogeneous electrode density and powerful deep learning techniques, the sensor is capable of rotation invariance around the arm axis, thus increasing gesture recognition robustness to electrode movement and inter-session evaluation. The system is made of a 4x16 electrode array covering the full circumference of the limb, and uses a sampling frequency of 1 kHz and a 16-bit resolution. The sensor’s uniform and adjustable geometry paired with an array barrel shifting data augmentation (ABSDA) technique allows a convolutional neural network to maintain a 76.98% inter-session classification accuracy for a 6 gestures dataset, from a baseline intra-session accuracy of 93.75%. High inter-session classification accuracy decreases the training burden for users of EMG control systems such as myoelectric prostheses by minimizing calibration requirements. The same methods applied with different state-of-the-art sensors are demonstrated to be less effective. Thus, this work evidences the importance of co-designing the EMG sensor system with the gesture inference algorithms to leverage synergistic properties and solve state-of-the-art *** relevance— This paper establishes a method that alleviates clinical manipulations in setting up and calibrating myoelectric prosthetic devices.

关键词：

来源：评论

学校读者我要写书评

暂无评论

NDT-Map-Code: A 3D global descriptor for real-time loop closure detection in lidar SLAM

NDT-Map-Code: A 3D global descriptor for real-time loop clos...

引用

IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)

作者： Lizhou Liao Wenlei Yan Li Sun Xinhui Bai Zhenxing You Hongyuan Yuan Chunyun Fu College of Mechanical and Vehicle Engineering Chongqing University China The Autonomous Driving Division NIO China Department of Computer Science The University of Sheffield UK State Key Laboratory of Mechanical Transmission for Advanced Equipment Chongqing University China

ISBN: (数字)9798350377705

ISBN: (纸本)9798350377712

Loop-closure detection, also known as place recognition, aiming to identify previously visited locations, is an essential component of a SLAM system. Existing research on lidar-based loop closure heavily relies on dense point cloud and 360 FOV lidars. This paper proposes an out-of-the-box NDT (Normal Distribution Transform) based global descriptor, NDT-Map-Code, designed for both on-road driving and underground valet parking scenarios. NDT-Map-Code can be directly extracted from the NDT map without the need for a dense point cloud, resulting in excellent scalability and low maintenance cost. The NDT representation is leveraged to identify representative patterns, which are further encoded according to their spatial location (bearing, range, and height). Experimental results on the NIO underground parking lot dataset and the KITTI dataset demonstrate that our method achieves significantly better performance compared to the state-of-the-art.

关键词： Point cloud compression Location awareness Laser radar Simultaneous localization and mapping Three-dimensional displays Shape Scalability Transforms Real-time systems Spatial databases

来源：评论

学校读者我要写书评

暂无评论

Human-centric assembly in smart factories

引用

CIRP Annals 2025年

作者： Wang, Lihui Gao, Robert X. Krüger, Jörg Váncza, József Department of Production Engineering KTH Royal Institute of Technology Stockholm Sweden Department of Mechanical and Aerospace Engineering Case Western Reserve University Cleveland United States Institute for Machine Tools and Factory Management Technical University Berlin Germany Laboratory of Engineering and Management Intelligence Institute for Computer Science and Control Hungary

Assembly in future smart factories needs to address three challenges, including human centricity, sustainability, and resilience. Conventional approaches for automation in assembly have reached a bottleneck in terms of operation automomy, leaving various tasks to continued manual labour by human operators. To ease the burden on humans both physically and intellectually, human-centric assembly enhanced by augmented robots, cognitive systems, mixed reality and collaborative intelligence, assisted by thought-driven brain robotic controls, provides a promising solution. Within the context, this keynote provides an in-depth analysis of the state of human-centric assembly and identifies potentially fruitful research directions in future smart factories. © 2025 The Author(s)

关键词： Factory automation

来源：评论

学校读者我要写书评

暂无评论

Efficient Anti-Glare Ceramic Decals Defect Detection by Incorporating Homomorphic Filtering

引用

computer Systems science & engineering 2021年第3期36卷 551-564页

作者： Xin Chen Ying Zhang Lang Lin Junxiang Wang Jiangqun Ni Southeast Digital Economic Development Institute Quzhou324000China School of Mechanical and Electronic Engineering Jingdezhen Ceramic InstituteJingdezhen333400China School of Data and Computer Science Sun Yat-Sen UniversityCanton510000China

Nowadays the computer vision technique has widely found applicationsin industrial manufacturing process to improve their efficiency. However, it ishardly applied in the field of daily ceramic detection due to the following twokey reasons: (1) Low detection accuracy as a result of ceramic glare, and (2) Lackof efficient detection algorithms. To tackle these problems, a homomorphic filtering based anti-glare ceramic decals defect detection technique is proposed in thispaper. Considering that smooth ceramic surface usually causes glare effects andleads to low detection results, in our approach, the ceramic samples are takenin low light environment and their luminance and details restored by a homomorphic filtering based image enhancement technique. With relatively high quality preprocessed images, an effective ceramic decal defect detection algorithm isthen designed to rapidly locate those out-of-bounds defects and further estimatetheir size. The experimental results show that the proposed scheme could achieveits desired performance.

关键词： Ceramic glaring homomorphic filtering ceramic decal border extraction out-of-bounds detection

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：