检索结果-内蒙古大学图书馆

arXiv 2025年

作者： Yang, Yingyuan Liang, Guoyuan Wang, Xianwen Wang, Kaiming Wang, Can Wu, Xiaojun Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen518055 China University of Chinese Academy of Sciences Beijing10049 China Guangdong Provincial Key Laboratory of Robotics and Intelligent System Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen518055 China Guilin University of Technology Guilin541000 China School of Mechanical Engineering and Automation Harbin Institute of Technology at Shenzhen Shenzhen518055 China

To satisfy the rigorous requirements of precise edge detection in critical high-accuracy measurements, this article proposes a series of efficient approaches for localizing subpixel edge. In contrast to the fitting based methods, which consider pixel intensity as a sample value derived from a specific model. We take an innovative perspective by assuming that the intensity at the pixel level can be interpreted as a local integral mapping in the intensity model for subpixel localization. Consequently, we propose a straightforward subpixel edge localization method called Converted Intensity Summation (CIS). To address the limited robustness associated with focusing solely on the localization of individual edge points, a Stable Edge Region (SER) based algorithm is presented to alleviate local interference near edges. Given the observation that the consistency of edge statistics exists in the local region, the algorithm seeks correlated stable regions in the vicinity of edges to facilitate the acquisition of robust parameters and achieve higher precision positioning. In addition, an edge complement method based on extension-adjustment is also introduced to rectify the irregular edges through the efficient migration of SERs. A large number of experiments are conducted on both synthetic and real image datasets which cover common edge patterns as well as various real scenarios such as industrial PCB images, remote sensing and medical images. It is verified that CIS can achieve higher accuracy than the state-of-the-art method, while requiring less execution time. Moreover, by integrating SER into CIS, the proposed algorithm demonstrates excellent performance in further improving the anti-interference capability and positioning accuracy. Copyright © 2025, The Authors. All rights reserved.

关键词： Pixels

来源：评论

学校读者我要写书评

暂无评论

Wandering around: A bioinspired approach to visual attention through object motion sensitivity

arXiv

引用

arXiv 2025年

作者： D’Angelo, Giulia Clerico, Victoria Bartolozzi, Chiara Hoffmann, Matej Furlong, P. Michael Hadjiivanov, Alexander Department of Cybernetics Faculty of Electrical Engineering Czech Technical University Prague Czech Republic IBM Research Europe Zurich Switzerland Event-Driven Perception for Robotics Italian Institute of Technology Genoa Italy National Research Council of Canada & Systems Design Engineering University of Waterloo Canada Advanced Concepts Team European Space Agency Noordwijk Netherlands Adapsent Leiden Netherlands

Active vision enables dynamic and robust visual perception, offering an alternative to the static, passive nature of feedforward architectures commonly used in computer vision, which depend on large datasets and high computational resources. Biological selective attention mechanisms allow agents to focus on salient Regions of Interest (ROIs), reducing computational demand while maintaining real-time responsiveness. Event-based cameras, inspired by the mammalian retina, further enhance this capability by capturing asynchronous scene changes, enabling efficient, low-latency processing. To distinguish moving objects while the event-based camera is also in motion, the agent requires an object motion segmentation mechanism to accurately detect targets and position them at the center of the visual field (fovea). Integrating event-based sensors with neuromorphic algorithms represents a paradigm shift, using Spiking Neural Networks (SNNs) to parallelise computation and adapt to dynamic environments. This work presents a Spiking Convolutional Neural Network (sCNN) bioinspired attention system for selective attention through object motion sensitivity. The system generates events via fixational eye movements using a Dynamic Vision Sensor (DVS) integrated into the Speck neuromorphic hardware, mounted on a Pan-Tilt unit, to identify the ROI and saccade toward it. The system, characterised using ideal gratings and benchmarked against the Event Camera Motion Segmentation Dataset (EVIMO), reaches a mean IoU of 82.2% and a mean SSIM of 96% in multi-object motion segmentation. Additionally, the detection of salient objects reaches an accuracy of 88.8% in office scenarios and 89.8% in challenging indoor and outdoor low-light conditions, as evaluated on the Event-Assisted Low-Light Video Object Segmentation Dataset (LLE-VOS). A real-time demonstrator showcases the system’s capabilities of detecting the salient object through object motion sensitivity in 0.124 s in dynamic scenes. Its l

关键词： Eye movements

来源：评论

学校读者我要写书评

暂无评论

Cubic boron arsenide: An emerging semiconductor with exceptional thermal conductivity and high carrier mobility

引用

Matter 2025年第5期8卷

作者： Yue, Shuai Tian, Fei Song, Bai Zhong, Yangguang Bao, Jiming Liu, Xinfeng CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and Technology Beijing100190 China School of Materials Science and Engineering Sun Yat-sen University Guangdong Guangzhou510006 China Department of Energy and Resources Engineering and Department of Advanced Manufacturing and Robotics Peking University Beijing100871 China Department of Electrical and Computer Engineering and Texas Center for Superconductivity University of Houston HoustonTX77204 United States University of Chinese Academy of Sciences Beijing100049 China College of Materials Science and Engineering Hunan University Hunan Changsha410082 China

Over the past decade, cubic boron arsenide (BAs) has emerged as a highly promising semiconductor owing to its extraordinary thermal conductivity (1,200 W/m·K) and high ambipolar mobility (1,600 cm2/V·s). This unique combination has spurred significant research interest in its potential for advanced device applications. However, the challenge of growing uniform, high-quality crystals has hindered its widespread adoption, limiting its realization in high-performance devices. To accelerate the development and utilization of BAs, we systematically review recent theoretical and experimental advancements, focusing on key aspects such as carrier mobility, carrier relaxation, and the impact of defects on thermal conductivity and carrier mobility. Additionally, we explore emerging applications, persistent challenges, and future research directions. By addressing these critical issues, we aim to inspire further research and facilitate the development of next-generation electronic and optoelectronic devices based on BAs. © 2025 Elsevier Inc.

关键词： Carrier mobility

来源：评论

学校读者我要写书评

暂无评论

Recreating human ability with wearable robotics technology

Nature Reviews Electrical Engineering

引用

Nature Reviews Electrical engineering 2025年 1-2页

作者： Kyeongsu Shi Kyoungchul Kong Advanced Research Institute Angel Robotics Daejeon Republic of Korea Department of Mechanical Engineering Korea Advanced Institute of Science and Technology Daejeon Republic of Korea

来源：评论

学校读者我要写书评

暂无评论

Evaluating Trunk Control Ability in Patients with Spinal Cord Injury via a Robotic Brace

引用

IEEE Transactions on Biomedical engineering 2025年 PP卷 PP页

作者： Guo, Xingzhao Zhou, Zhihao Shi, Jiehong Wang, Rongli Wang, Ninghua Wang, Qining Zhengzhou University School of Mechanical and Power Engineering Zhengzhou450001 China Beijing Engineering Research Center of Intelligent Rehabilitation Engineering Beijing100871 China Peking University Institute for Artificial Intelligence Beijing100871 China Peking University First Hospital Beijing100034 China Peking University School of Advanced Manufacturing and Robotics Faculty of Engineering Beijing100871 China University of Health and Rehabilitation Sciences Qingdao China

Evaluating trunk control ability is significant in guiding patients towards proper functional training. Existing assessment techniques are subjective with low resolution, lack multi-dimensional assessment capability, or fail to provide active protection for patients during evaluation. This study proposes a robotic brace, RoboBDsys-II, to assess trunk control ability in multiple dimensions. It is capable of implementing external interventions and providing active protection during evaluation, and collecting kinematic, kinetic, and center of pressure data simultaneously. This reduces the evaluation time and allows for simultaneous evaluation. We recruited 10 patients with spinal cord injury, and assessed their trunk muscle strength, range of motion and resistance ability. The relative and absolute reliability were analyzed by ICC and %SEM, and the validity was examined by the correlation metrics. Results indicate heterogeneity of trunk control abilities for patients with spinal cord injury in different directions, guiding therapists to focus on the areas where the patient's abilities are weak. 10/12 metrics in ROM and resistance assessment exhibit good reliability with high ICC (> 0.75) and low %SEM ( © 1964-2012 IEEE.

关键词： Electrotherapeutics

来源：评论

学校读者我要写书评

暂无评论

Unsupervised Training Framework for 3D Point Cloud Object Detection Model 25

Unsupervised Training Framework for 3D Point Cloud Object De...

引用

Proceedings of the 40th ACM/SIGAPP Symposium on Applied Computing

作者： Min-Jyun Wu Hsiang-Jui Lin Shih-Hao Hung Chi-Sheng Shih Dept. of Computer Science and Information Engineering National Taiwan University Taipei Taiwan High Performance and Scientific Computing (HPSC) Center National Taiwan University Taipei Taiwan Graduate Institute of Networking and Multimedia National Taiwan University Taipei Taiwan Center of Artificial Intelligence and Advanced Robotics National Taiwan University Taipei Taiwan

ISBN: (纸本)9798400706295

Point cloud data frames are critical, if not indispensable, for precise robot navigation and localization, but training the object detection models for them remains challenging. Many models require labeled 3D objects to train the model. However, the sparse and occluded 3D point cloud data make it difficult, if not impossible, to automate the labeling process. This work proposes a training framework to generate 3D labels on point clouds to tackle the aforementioned challenges. The proposed method takes advantage of the consecutive presence of the same object on different frames to automate the labeling process. The experimental results show that the unsupervised framework trains a robust model for 3D object detection. On the roadside data, the model archives 90.27% AP for scooters and 91.33% AP for cars. On nuScenes dataset, the framework demonstrates the detection precision doubles on IoU 0.25 and IoU 0.5 when the recalls remain similar, compared to the model trained by the MODEST framework.

关键词： computer systems organization

来源：评论

学校读者我要写书评

暂无评论

Decoupling of nanoindentation residual stress field in single-crystalline 4H-SiC via micro-Raman spectroscopy

引用

Optics Letters 2025年第11期50卷 3513-3516页

作者： Yang, Zhoudong Tian, Jing Wang, Xinyue Chen, Junwei Zuo, Yuanhui Zhang, Rongjun Tang, Hongyu Fan, Xuejun Zhang, Guoqi Fan, Jiajie Shanghai Engineering Technology Research Center for SiC Power Device School of Intelligent Robotics and Advanced Manufacturing Fudan University Shanghai200433 China Research Institute of Fudan University in Ningbo Ningbo315336 China School of Information Science and Technology Fudan University Shanghai200433 China Department of Mechanical Engineering Lamar University PO Box 10028 BeaumontTX77710 United States EEMCS Faculty Delft University of Technology Delft2628 Netherlands

This Letter presents a combined analytical and experimental method to effectively decouple the radial and tangential residual stress fields induced by Berkovich nanoindentation in single-crystalline 4H-SiC using micro-Raman spectroscopy. By integrating the Raman stress characterization model with Yoffe’s expanding cavity model, precise extraction of individual residual stress components around the indentation region is realized. Through the vertical backscattering micro-Raman mapping of the E2 phonon mode, we systematically investigate the residual stress distribution near the indentation. The results highlight significant anisotropy in nanoindentation-induced stress fields, strongly dependent on the crystal orientation of 4H-SiC, predominantly featuring radial tensile stress gradients. This comprehensive theoretical–experimental approach offers a robust optical framework for residual stress characterization in 4H-SiC and provides foundational insights for extending Raman spectroscopy-based stress characterization to other crystalline materials and related device structures. © 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

关键词： Raman spectroscopy

来源：评论

学校读者我要写书评

暂无评论

DYNAMICS OF NONRIGID ARTICULATED ROBOT LINKAGES

引用

IEEE TRANSACTIONS ON AUTOMATIC CONTROL 1985年第5期30卷 499-502页

作者： JUDD, RP FALKENBURG, DR Center of Robotics and Advanced Automation School of Engineering Oakland University Rochester MI USA

This paper presents the kinematic and dynamic analysis of an n -link manipulator with flexible members. The deformation of a link from its rigid body position is modeled by a homogeneous transformation. The dynamic equations are obtained using Euler-Lagrange formulation. These equations are compared to those describing a rigid link mechanism.

关键词： Robots Couplings Performance analysis Automatic control Manipulator dynamics Linear systems Control systems robotics and automation Kinematics Transient response

来源：评论

学校读者我要写书评

暂无评论

Topological dependence of mechanical responses of solidification microstructures in aluminum brazed joints

引用

中国有色金属学会会刊：英文版 2003年第6期13卷 1296-1300页

作者：高峰钱乙余 D.P.Sekulic 马鑫 F.Yoshida State Key Laboratory of Advanced Production Technology Center for Robotics and Manufacturing Systems Department of Mechanical System Engineering

The main objective is to provide an evidence of spatial dependence of mechanical responses of a heterogeneous aluminum brazed joint re-solidified clad, and to confirm a sufficient sensitivity of a nano-indentation—load curve method for identifying the dependence. Topological features of a network of solidification microstructures(α phase and eutectic), formed during quench in a brazing process of aluminum alloy, influence significantly dynamic mechanical responses of resulting heterogeneous material. Nano/micro indentation depth vs load characteristics of differing phases suggest a spatially sensitive mechanical response of a re-solidified fillet in the joint zone. Hence, a spatial distribution, pattern formations and other morphological characteristics of microstructures have a direct impact on an ultimate joint integrity. Topology-induced variations of indentation—load curves was presented. A hypothesis involving microstructures’ spatial distribution vs mechanical response was formulated.

关键词：铝铜焊显微结构凝固拓扑相关机械响应焊接铝合金

来源：评论

学校读者我要写书评

暂无评论

DYNAMIC MODELING AND CONTROL BY UTILIZING AN IMAGINARY ROBOT MODEL

引用

IEEE JOURNAL OF robotics AND AUTOMATION 1988年第5期4卷 532-540页

作者： GU, YL LOH, NK School of Engineering and Computer Science Center for Robotics and Advanced Automation Oakland University Rochester MI USA

A dynamic model that represents an exact linearization scheme with a simplified nonlinear feedback is presented. To realize this model for robotic systems, the output functions should be chosen so that a special decomposition of the total inertial matrix is satisfied. The concept of an imaginary robot is utilized to achieve the formulation and to solve the realization problem. Two illustrative examples are given in the paper, one for the Stanford arm and the other for a PUMA type of robot. An optimal robotic physical design and a control system design based on the new model are also discussed.

关键词： dynamic models nonlinear feedback control systems design Robot

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：