检索结果-内蒙古大学图书馆

2022 Chinese Automation Congress, CAC 2022

作者： Zhang, Hanxuan Huo, Ju Sun, Wei Xue, Muyao Zhou, Jianbao Harbin Institute of Technology School of Electrical Engineering and Automation Harbin China Technology Research Institute Shanghai Space Propulsion Shanghai China Harbin Nuoxin University of Technology Measurement and Control Technology Co. Ltd Harbin China

ISBN: (纸本)9781665465335

Aiming at the fact that most simultaneous localization and mapping (SLAM) methods are fragile in dynamic environment, a static feature point extraction algorithm for visual-inertial SLAM is proposed. Firstly, the distance from feature matching to transformation matrix is calculated by cleverly combining inertial measurement unit (IMU) data and visual information. Secondly, a static probability model for distinguishing feature point categories is established based on the binomial logistic regression model. These categorical feature points are used in subsequent algorithms to select more stable data associations. Finally, the algorithm is integrated into the ORBSLAM-3 system, and extensive experiments are performed on the OpenLORIS-Scene public dataset and real world to verify the performance of the integrated system. The results show our algorithm not only maintains the high-precision localization performance of the original system in the static environment, but also improves the localization accuracy of the original system in the dynamic environment. © 2022 IEEE.

关键词： Extraction

来源：评论

学校读者我要写书评

暂无评论

Laser heterodyne interferometry nano-displacement measurement based on an electro-optic modulation double sideband

引用

Optics Letters 2025年第13期50卷 4274-4277页

作者： Shuwei Zhang Xiaoping Li Haifeng Sun Zhongwen Deng Wenjun Chen Lirong Shen Lin Li Hengkang Zhang Li Wang School of Aerospace Science and Technology Xidian University Xi’an 71000 China Space Optoelectronic Measurement and Perception Lab Beijing Institute of Control Engineering Beijing 100190 China

We propose a novel, to our knowledge, dual-frequency laser heterodyne interferometry nano-displacement measurement method utilizing electro-optic modulation (EOM) to generate double-sideband signals. Unlike conventional dual-frequency laser techniques, the proposed EOM based approach produces strictly symmetric double sidebands with suppressed polarization aliasing errors. By integrating optical digital coherent detection with an all-phase FFT (apFFT) fringe counting algorithm, we achieve nanoscale displacement estimation. The experimental results demonstrate that the proposed method has a resolution better than 3 nm with a microdisplacement measurement accuracy of 3 nm, and maintaining an excellent linearity of 0.0015% during high-speed displacement measurements at 0.1 m/s across 100 mm measurement range. These features suggest broad applicability across high-speed and ultra-precision measurement scenarios, indicating strong potential for industrial metrology and nanotechnology applications.

关键词： Frequency modulation Fringes Heterodyne detection Laser interferometry Laser sources Phase estimation

来源：评论

学校读者我要写书评

暂无评论

Path Optimization of Complex and Large-Scale Automated Antenna Assembly Lines

Path Optimization of Complex and Large-Scale Automated Anten...

引用

UNIfied Conference of International Workshop on Defence Applications of Multi-Agent Systems, DAMAS 2023, International Conference on Maintenance engineering, IncoME-V 2023, International conference on the Efficiency and Performance engineering Network, TEPEN 2023

作者： Ma, Zeyu Wang, Hongjun Zhang, Mingliang Jiang, Fan Li, Bin School of Mechanical Electrical Engineering Beijing Information Science and Technology University Beijing100192 China Beijing International Science Cooperation Base of High-End Equipment Intelligent Perception Beijing100192 China Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing100192 China Beijing Institute of Radio Measurement Beijing100854 China School of Information Management Beijing Information Science and Technology University Beijing100192 China

ISBN: (纸本)9783031494208

Considering issues such as low assembly efficiency and the inability of the assembly process index and product characteristics to be fully reflected in the traditional construction mechanical arm assembly process, the concept of a digital twin was introduced. The study involved the modeling and simulation technology of the construction mechanical arm assembly process based on the digital twin, and included some path optimization. Furthermore, according to the virtual model, a genetic algorithm was employed to optimize the path in Matlab. Additionally, the Hamiltonian cycle algorithm was utilized to enhance the efficiency of the robot and decrease the working time. Taking the assembly line of a screw arm as an example, it was demonstrated that the assembly simulation based on digital twinning can monitor the assembly process in real time. It can also optimize its configuration to improve assembly efficiency and implement an effective closed-loop feedback mechanism to enhance production efficiency, improve production quality, and reduce production cost. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Cyber Physical System

来源：评论

学校读者我要写书评

暂无评论

Digital Twin-Based Service System Platform

Digital Twin-Based Service System Platform

引用

TEPEN International Workshop on Fault Diagnostics and Prognostics, TEPEN-IWFDP 2024

作者： Ma, Zeyu Wang, Hongjun Zhang, Mingliang School of Mechanical Electrical Engineering Beijing University of Information Science and Technology Beijing100192 China Beijing International Science Cooperation Base of High-End Equipment Intelligent Perception Beijing100192 China Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing100192 China Beijing Institute of Radio Measurement Beijing100854 China School of Information Management Beijing Information Science and Technology University Beijing100192 China

ISBN: (纸本)9783031702341

This paper discusses the integration and application of digital twin technology within the manufacturing sector, underscoring its pivotal role in advancing the Industry 4.0 revolution. Digital twin technology, which creates dynamic virtual replicas of physical systems, facilitates enhanced simulation, analysis, and optimization of real-world processes. The implementation of this technology, illustrated through examples from NASA and the U.S. Air Force Research Laboratory, demonstrates its significant contributions across the entire product lifecycle, including design, manufacturing, service operation, and maintenance. The paper introduces a comprehensive framework for a digital twin-based production line service system, leveraging the Internet of Things (IoT) technology and flexible simulation to enable real-time user-application interaction, front-end operation responsiveness, and efficient data management. This system enhances operational efficiency, reduces time-to-market, and improves issue prediction and mitigation through virtual-real mapping and debugging. An application case using MongoDB highlights the technology's adaptability and effectiveness in managing complex data structures. The study concludes that digital twin technology is instrumental in driving smart manufacturing, innovation, and maintaining a competitive advantage in the evolving industrial landscape. Key references provide a foundation for understanding the technology's development and application, reinforcing the digital twin's role as a transformative element in manufacturing. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： NASA

来源：评论

学校读者我要写书评

暂无评论

Research and Suggestions for Evaluation Metrics of On-board Video Desensitization 5

Research and Suggestions for Evaluation Metrics of On-board ...

引用

5th International Conference on Information Science, Parallel and Distributed Systems, ISPDS 2024

作者： Huang, Xiaolong Hu, Te Ji, Haojie Chen, Yupeng Lu, Wangdong He, Peng Sun, Guowei Wang, Jingyan State Key Laboratory of Intelligent Vehicle Safety Technology Chongqing China Key Laboratory of Modern Measurement & Control Technology Ministry of Education Beijing Information Science & Technology University Beijing China China Automotive Engineering Research Institute Co. Ltd Chongqing China Zhongtong Bus Holding Co. Ltd Liaocheng China

ISBN: (纸本)9798350352719

Sensitive data leakage has become an urgent problem to be solved as more images based functionalities are being developed in vehicles. However, there is a scarcity of evaluation for on-board videos data desensitization. This research analyzes on-board video desensitization process including the image pre-processing stage, sensitive area localization stage and sensitive area desensitization stage. Considering that, this paper presents several evaluation methods and metrics of sensitive target detection performance, privacy-utility evaluation of video file metadata and image, so as to provide reference for the related research on the desensitization evaluation of on-board video. © 2024 IEEE.

关键词： Information leakage

来源：评论

学校读者我要写书评

暂无评论

MorNet: Asymmetric UNet-like Network with Morphological Opening and Closing for Image Segmentation 17th

MorNet: Asymmetric UNet-like Network with Morphological Open...

引用

17th International Conference on Intelligent Robotics and Applications, ICIRA 2024

作者： Li, Meng Yun, Juntong Jiang, Du Tao, Bo Li, Gongfa Liu, Rong Liu, Ying Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education Wuhan University of Science and Technology Wuhan430081 China Research Center for Biomimetic Robot and Intelligent Measurement and Control Wuhan University of Science and Technology Wuhan430081 China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Wuhan430081 China Precision Manufacturing Research Institute Wuhan University of Science and Technology Wuhan430081 China School of Medicine Wuhan University of Science and Technology No. 1 Huangjia Lake University Town Wuhan430065 China School of Mechanical Engineering Hubei Engineering University Xiaogan432000 China

ISBN: (纸本)9789819607761

Image segmentation plays a crucial role in target recognition as it provides an essential prerequisite for identifying targets. However, UNet cannot acquire comprehensive information about the image, which limits its ability to effectively segment small and discrete objects. A new network structure, called MorNet, is proposed. It applies dilation and erosion operations in morphological opening and closing for connected and discrete region segmentation. MorNet effectively integrates global segmentation images, emphasizing small and discrete area segmentation and enhancing the segmentation of large continuous areas. This method enhances the understanding of the location of organs and diseased sites, enabling accurate segmentation. A side-out (SO) monitoring mechanism is introduced into the decoder to provide monitoring information for the original image and the predicted results. Compared with current UNet-like networks, our proposed method achieved the highest Dice scores (96.4635%, 94.0514%, 94.3444%) and PPV scores (94.2226%, 90.2361%, 91.5582%) for liver tumor, brain tumor, and liver segmentation tasks, respectively. The experimental results show that MorNet successfully combines the segmentation of connected and discrete regions. MorNet locates organs and lesions more accurately than current state-of-the-art medical image segmentation models. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Image segmentation

来源：评论

学校读者我要写书评

暂无评论

Research on detection and measurement method of automotive connector terminal based on improved YOLOv7 4

Research on detection and measurement method of automotive c...

引用

4th IEEE International Conference on Electronic technology, Communication and Information, ICETCI 2024

作者： Bai, Guangze Gu, Jun Xing, Yan Xue, Guiyan Guo, Xu Song, Wanze Luo, Congbo Gu, Yu Wei, Lai Liu, Xue Changchun Vocational and Technical College Automotive Institute Changchun China Intelligent Technology Co. Ltd Changchun Jielin Changchun China Changchun City Construction Engineering School Changchun China Technical College Changchun Automotive Changchun China Co. Ltd Xinhe Measurement and Control Technology Changchun China

ISBN: (纸本)9798350361643

As a vital part of the automotive electrical system, the connector pins support the transmission of electrical signals, data and power to ensure the correct connection and collaboration between the various components of the vehicle, and their quality and reliability are crucial to the performance, safety and reliability of the vehicle. Therefore, it is of great significance to study an automatic detection method for the connection pins of automobile connectors. The traditional connector needle detection mainly relies on manual method, due to the relatively dense distribution of the connector needle and the human eye is easy to fatigue and other factors. This method has the problems of high detection error rate, low accuracy and low efficiency. Therefore, this paper proposes an automatic detection method for connecting pins of automotive connector based on improved Yolov7 target detection. This method adds attention mechanism on the basis of Yolov7 target detection, which can be more suitable for small target detection. Finally, after the improvement, the results of the YOLOV7 target detection model training, mAP@0.5, reached 94.87%, and map@0.5:0.95, reached 75.28%. compared with the results before the improvement, mAP@0.5, 69.7%, map@0.5:0.95, 51.2%. Increases of 25.17% and 24.08%, respectively. It is proved that the improved model is more suitable for the detection of the connection pin of the auto-mobile connector. The detection rate of the final car connector pin is as follows: After the car connector pin is detected, the pin spacing is measured by the method of image processing in this paper, and the measurement accuracy meets the practical requirements. At the same time, the research content of this paper has laid the groundwork for other electrical and signal tests of automobile connector in the future. © 2024 IEEE.

关键词： Image enhancement

来源：评论

学校读者我要写书评

暂无评论

Combined calibration method for large field of view multi-camera system

Combined calibration method for large field of view multi-ca...

引用

2022 Chinese Automation Congress, CAC 2022

作者： Sun, Wei Huo, Ju Li, You Xue, Muyao Zhou, JianBao Harbin Institute of Technology School of Electrical Engineering and Automation Harbin China Shanghai Space Propulsion Technology Research Institute Shanghai China Harbin Nuoxin University of Technology Measurement and Control Technology Co. Ltd. Harbin China

ISBN: (纸本)9781665465335

In the calibration process of multi-camera system with large field of vie23, aiming at the problem of self occlusion in the plane calibration method and the problem of low calibration accuracy of one-dimensional calibration methods, a calibration method of multi-camera system based on the combination of plane target and one-dimensional target is proposed. Firstly, a mathematical model of multi-camera calibration is established with pin-hole model and rigid body transformation theory;the internal parameters and distortion coefficients of each camera are calibrated by two-dimensional plane target;on this basis, analyze the uncertainty of imaging error of circular feature points, cost function of random sample consensus algorithm(RANSAC) is improved. Using the camera imaging model, the essential matrix between cameras is estimated, and the initial value of camera external parameters is decomposed and determined;lastly, multiple nonlinear optimization algorithms are used to refine and obtain the camera matrix, The simulation and actual experimental results show that the multi camera system combination calibration method proposed in this paper can realize the parameter calibration of four camera measurement system, and the measurement space is 2000mm×2000mm×2000mm, the 3D reconstruction error is less than 0.15mm. Compared with the traditional calibration method, it has more accurate calibration accuracy. © 2022 IEEE.

关键词： Calibration

来源：评论

学校读者我要写书评

暂无评论

Temperature Response Analysis of Intelligent OPPC Cable Core Based on Finite Element Simulation 22

Temperature Response Analysis of Intelligent OPPC Cable Core...

引用

22nd International Conference on Optical Communications and Networks, ICOCN 2024

作者： Xie, Wenping Nie, Ming Liang, Yongchun Luo, Xiaoyu Han, Yu Li, Hongwei Tang, Xiaohui Electric Power Research Institute of Guangdong Power Grid Co. Ltd. Guangzhou510080 China School of Measurement and Communication Engineering Heilongjiang Provincial Key Laboratory of Quantum Control Harbin150006 China Harbin University of Science and Technology Harbin150001 China

ISBN: (纸本)9798350367652

The Optical Fiber Composite Overhead Conductor (OPPC) cable is a special type of power optical cable that combines overhead conductor and communication capabilities. It has advantages such as strong wind resistance, good corrosion resistance, high bandwidth transmission, low loss transmission, and high reliability. However, as the OPPC cable operates for a long time power transmission, its long-term working temperature has a significant impact on transmission performance and lifespan. Therefore, monitoring the temperature of the OPPC cable and internal fibers can improve the transmission capacity of the line, ensure good thermal stability, and provide important references for fault warning and maintenance. This study aims to explore the temperature characteristics of the OPPC cable through actual monitoring and analysis, providing guidance and decision-making basis for practical applications. © 2024 IEEE.

关键词： Corrosion resistance

来源：评论

学校读者我要写书评

暂无评论

Research on Neural Network Adaptive Noise Cancellation Technique Based on BP Algorithm 24

Research on Neural Network Adaptive Noise Cancellation Techn...

引用

8th International Conference on High Performance Compilation, Computing and Communications, HP3C 2024

作者： Zhang, Hong Dong, Yanling Pang, Simiao Li, Shengzhu Changchun Institute of Technology National and Local Joint Engineering Research Center for Measurement Control and Safe Operation of Intelligent Distribution Networks China Zhejiang Datang Wusha Mountain Power Generation Co. Ltd China State Grid Jilin Electric Power Company China

ISBN: (纸本)9798400716904

Adaptive filter is a kind of filter with high filtering accuracy that has the ability to adapt to the environment, adapt to the system and environmental changes, and has a wide range of applications in noise cancellation research. In this paper, we mainly utilize BP network for the filtering of adaptive algorithm, and build a BP neural network of 1-4-1 structure with 1 node in the input layer and 1 node in the output layer and 4 nodes in the hidden layer according to the basic principle of adaptive filtering, and explain in detail the method of creating, training and simulating the neural network, and establish the simulation model of adaptive filtering of the BP network based on Simulink. The simulation results verify that the adaptive filter can estimate the required statistical characteristics and automatically adjust its own parameters following the changes in the statistical characteristics. The BP neural network achieves the desired optimal filtering effect by adaptively changing the weight coefficients of the filter for the noisy signals, thus effectively eliminating the interference of the external signals and improving the signal-to-noise ratio of the input signals. © 2024 ACM.

关键词： Wiener filtering

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：