检索结果-南通市图书馆

A Rapid Adaptation Approach for Dynamic Air‑Writing Recognition Using Wearable Wristbands with Self‑Supervised Contrastive Learning

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 417-431页

作者： Yunjian Guo Kunpeng Li Wei Yue Nam‑Young Kim Yang Li Guozhen Shen Jong‑Chul Lee Department of electronic Convergence Engineering Kwangwoon UniversitySeoul 01897South Korea Radio Frequency Integrated Circuit(RFIC)Bio Centre Kwangwoon UniversitySeoul 01897South Korea Department of electronic Engineering Kwangwoon UniversitySeoul 01897South Korea School of Microelectronics Shandong UniversityJinan 250101People’s Republic of China State key laboratory of Integrated Chips and systems Fudan UniversityShanghai 200433People’s Republic of China School of Integrated Circuits and electronics Beijing Institute of TechnologyBeijing 100081People’s Republic of China

Wearable wristband systems leverage deep learning to revolutionize hand gesture recognition in daily *** existing approaches that often focus on static gestures and require extensive labeled data,the proposed wearable wristband with selfsupervised contrastive learning excels at dynamic motion tracking and adapts rapidly across multiple *** features a four-channel sensing array composed of an ionic hydrogel with hierarchical microcone structures and ultrathin flexible electrodes,resulting in high-sensitivity capacitance *** wireless transmission from a Wi-Fi module,the proposed algorithm learns latent features from the unlabeled signals of random wrist ***,only few-shot labeled data are sufficient for fine-tuning the model,enabling rapid adaptation to various *** system achieves a high accuracy of 94.9%in different scenarios,including the prediction of eight-direction commands,and air-writing of all numbers and *** proposed method facilitates smooth transitions between multiple tasks without the need for modifying the structure or undergoing extensive task-specific *** utility has been further extended to enhance human–machine interaction over digital platforms,such as game controls,calculators,and three-language login systems,offering users a natural and intuitive way of communication.

关键词： Wearable wristband Self-supervised contrastive learning Dynamic gesture Air-writing Human-machine interaction

Effects of laser beam divergence angle on airborne LIDAR positioning errors

在线全文

学校读者我要写书评

暂无评论

Journal of beijing Institute of technology 2012年第2期21卷 278-284页

作者：姜利芳蓝天顾美霞倪国强 key laboratory of Photo-electronic Imaging technology and system Beijing Institute of Technology

The influence of laser beam divergence angle on the positioning accuracy of scanning airborne light detection and ranging （LIDAR） is analyzed and simulated. Based on the data process and positioning principle of airborne LIDAR, the errors from pulse broadening induced by laser beam di vergence angle are modeled and qualitatively analyzed for different terrain surfaces. Simulated results of positioning errors and suggestions to reduce them are given for the flat surface, the downhill of slope surface, and the uphill surface.

关键词： Kairborne light detection and ranging (LIDAR) positioning error laser beam divergenceangle slope angle scan angle

Design of 3D-printed Cable Driven Humanoid Hand Based on Bidirectional Elastomeric Passive Transmission

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2021年第4期34卷 225-235页

作者： Teru Chen Xingwei Zhao Guocai Ma Bo Tao Zhouping Yin State key laboratory of Digital Manufacturing Equipment and technology Huazhong University of Science and TechnologyWuhan 430074China State key laboratory of Intelligent Manufacturing system technology Beijing Institute of Electronic System EngineeringBeijing 100854China

Motion control of the human hand is the most complex part of the human *** has always been a challenge for a good balance between the cost,weight,responding speed,grasping force,finger extension,and dexterity of prosthetic *** solve these issues,a 3D-printed cable driven humanoid hand based on bidirectional elastomeric passive transmission(BEPT)is designed in this paper.A semi-static model of BEPT is investigated based on energy conservation law to analyze the mechanical properties of BEPT and a dynamical simulation of finger grasping is *** a good imitation of human hand and an excellent grasping performance,specific BEPT is selected according to human finger grasping *** advantage of BEPT based humanoid hand is that a good balance between the price and performance of the humanoid hand is *** proved that the designed prosthetic hand’s single fingertip force can reach 33 N and the fastest fingertip grasping speed realized 0.6 s/180°.It also has a good force compliance effect with only 430g’s *** can not only grab fragile objects like raw eggs and paper cup,but also achieve strong grasping force to damage metal *** humanoid hand has considerable application prospects in artificial prosthesis,human-computer interaction,and robot operation.

关键词： Humanoid hand Bidirectional elastomeric passive transmission Artificial prosthesis

Improved Anchored Neighborhood Regression Enhancement for Face Recognition

在线全文

学校读者我要写书评

暂无评论

Journal of Shanghai Jiaotong university(Science) 2018年第5期23卷 600-606页

作者： WANG Yunfei DING Hui SHANG Yuanyuan SHAO Zhuhong FU Xiaoyan beijing Advanced Innovation Center for Imaging technology Department of Physics College of Information Engineering beijing key laboratory of electronic system reliability technology Capital Normal UniversityBeijing 100048China

Although progress in face recognition is encouraging, the accuracy rate of face recognition remains to be increased. Since the face image quality has a positive influence on face recognition accuracy, the image enhancement methods are popular in face recognition. Most current image enhancement methods aim at improving visual appearance, but cannot improve recognition accuracy remarkably. In this paper, a feature evaluation operator is designed to overcome this problem. The operator selects patches with the best quality, and then face image is reconstructed with the selected patches. The proposed algorithm is tested on two different face recognition applications. Accuracy is raised after enhancement, and the result proves that the proposed algorithm is effective.

关键词： enhancement anchored neighborhood regression (ANR) recognition accuracy feature evaluationoperator

Multi-bit upset aware hybrid error-correction for cache in embedded processors

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2015年第11期36卷 48-52页

作者：董佳琪邱柯妮张伟功王晶王珍珍丁丽华 College of Information Engineering Capital Normal University beijing Center for Mathematics and Information Interdisciplinary Sciences beijing key laboratory of electronic system reliability and Prognostics

For the processor working in the radiation environment in space, it tends to suffer from the single event effect on circuits and system failures, due to cosmic rays and high energy particle radiation. Therefore, the reliability of the processor has become an increasingly serious issue. The BCH-based error correction code can correct multibit errors, but it introduces large latency overhead. This paper proposes a hybrid error correction approach that combines BCH and EDAC to correct both multi-bit and single-bit errors for caches with low cost. The proposed technique can correct up to four-bit error, and correct single-bit error in one cycle. Evaluation results show that, the proposed hybrid error-correction scheme can improve the performance of cache accesses up to 20% compared to the pure BCH scheme.

关键词： BCH single event upset cache multi-bit error correction embedded processor

Robustness evaluation method for unmanned aerial vehicle swarms based on complex network theory

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2020年第1期33卷 352-364页

作者： Xiaohong WANG Yuan ZHANG Lizhi WANG Dawei LU Guoqi ZENG School of reliability and systems Engineering Beihang UniversityBeijing 100083China Unmanned system Institute Beihang UniversityBeijing 100083China key laboratory of Advanced technology of Intelligent Unmanned Flight system of Ministry of Industry and Information technology Beijing 100083China

Unmanned Aerial Vehicle(UAV)swarms have been foreseen to play an important role in military applications in the future,wherein they will be frequently subjected to different disturbances and destructions such as attacks and equipment ***,a sophisticated robustness evaluation mechanism is of considerable importance for the reliable functioning of the UAV ***,their complex characteristics and irregular dynamic evolution make them extremely challenging and uncertain to evaluate the robustness of such a *** this paper,a complex network theory-based robustness evaluation method for a UAV swarming system is *** method takes into account the dynamic evolution of UAV swarms,including dynamic reconfiguration and information *** paper analyzes and models the aforementioned dynamic evolution and establishes a comprehensive robustness metric and two evaluation *** robustness evaluation method and algorithms considering dynamic reconfiguration and information correlation are ***,the validity of the proposed method is verified by conducting a case study *** results can further provide some guidance and reference for the robust design,mission planning and decision-making of UAV swarms.

关键词： Complex networks Dynamic reconfiguration Information correlation Robustness evaluation Unmanned Aerial Vehicles(UAV)

Diffusion mechanism simulation of cloud manufacturing complex network based on cooperative game theory

在线全文

学校读者我要写书评

暂无评论

Journal of systems Engineering and electronics 2018年第2期29卷 321-335页

作者： GENG Chao QU Shiyou XIAO Yingying WANG Mei SHI Guoqiang LIN Tingyu XUE Junjie JIA Zhengxuan Economics and Management School Harbin Institute of Technology at Weihai beijing Complex Product Advanced Manufacturing Engineering Research Center Beijing Simulation Center State key laboratory of Intelligent Manufacturing system technology Beijing Institute of Electronic System Engineering Science and technology on Space system Simulation laboratory Beijing Simulation Center

Cloud manufacturing is a specific implementation form of the "Internet + manufacturing" strategy. Why and how to develop cloud manufacturing platform(CMP), however, remains the key concern of both platform operators and users. A microscopic model is proposed to investigate advantages and diffusion forces of CMP through exploration of its diffusion process and mechanism. Specifically, a three-stage basic evolution process of CMP is innovatively proposed. Then, based on this basic process, a more complex CMP evolution model has been established in virtue of complex network theory, with five diffusion forces identified. Thereafter, simulations on CMP diffusion have been conducted. The results indicate that, CMP possesses better resource utilization,user satisfaction, and enterprise utility. Results of simulation on impacts of different diffusion forces show that both the time required for CMP to reach an equilibrium state and the final network size are affected simultaneously by the five diffusion forces. All these analyses indicate that CMP could create an open online cooperation environment and turns out to be an effective implementation of the "Internet + manufacturing" strategy.

关键词： complex network cloud manufacturing innovation diffusion network effect Gale-Shapley algorithm cooperative game theory

system reliability evaluation method considering physical dependency with FMT and BDD analytical algorithm

在线全文

学校读者我要写书评

暂无评论

Journal of systems Engineering and electronics 2022年第1期33卷 222-232页

作者： CHEN Ying WANG Yanfang YANG Song KANG Rui School of reliability and system Engineering Beihang UniversityBeijing 100191China Science and technology on reliability and Environmental Engineering laboratory Beihang UniversityBeijing 100191China China Academy of Launch Vehicle technology Bejing 100076China

Recently, the physics-of-failure(PoF) method has been more and more popular in engineering to understand the failure mechanisms(FMs) of ***, due to the lack of system modeling methods and problem-solving algorithms,the information of FMs cannot be used to evaluate system *** paper presents a system reliability evaluation method with failure mechanism tree(FMT) considering physical dependency(PDEP) such as competition, trigger, acceleration, inhibition, damage accumulation, and parameter *** the binary decision diagram(BDD) analytical algorithm is developed to establish a system reliability *** operation rules of ite operators for generating BDD are *** flow chart of system reliability evaluation method based on FMT and BDD is *** proposed method is applied in the case of an electronic controller drive *** show that the method is effective to evaluate system reliability from the perspective of FM.

关键词： system reliability modeling failure physical dependency failure mechanism tree(FMT) binary decision diagram(BDD)

Novel image restoration model coupling gradient fidelity term based on adaptive total variation

在线全文

学校读者我要写书评

暂无评论

Journal of beijing Institute of technology 2011年第2期20卷 261-266页

作者：石明珠许廷发梁炯冯亮张坤周立伟 School of Optoelectronics beijing Institute of technology key laboratory of Photo electronic Imaging technology and system Ministry of Education of China beijing Institute of technology

A novel image restoration model coupling with a gradient fidelity term based on adaptive total variation is proposed in this paper. In order to choose proper parameters, the selection criteria were analyzed theoretically, and a simple scheme to demonstrate its validity was adopted experimentally. To make fair comparisons of performances of three models, the same numerical algorithm was used to solve partial differential equations. Both the international standard test image on Lena and HR image of CBERS-02B of Dalian city were used to verify the performance of the model. Experimental results illustrate that the new model not only preserved the edge and important details but also alleviated the staircase effect effectively.

关键词： image restoration total variation(TV) gradient fidelity term staircase effect