Science China Information Sciences最新文献_第10页

A high precision two-axis GMR angular sensor manufactured by post-annealing 通过后退火制造的高精度双轴 GMR 角度传感器

IF 8.8 2区计算机科学

Science China Information Sciences Pub Date : 2024-05-23 DOI: 10.1007/s11432-024-4020-y

Zitong Zhou, Zhiqiang Cao, Shaohua Yan, Xiaolong Wang, Libo Xie, Shiyang Lu, Dapeng Zhu, Qunwen Leng, Weisheng Zhao

{"title":"A high precision two-axis GMR angular sensor manufactured by post-annealing","authors":"Zitong Zhou, Zhiqiang Cao, Shaohua Yan, Xiaolong Wang, Libo Xie, Shiyang Lu, Dapeng Zhu, Qunwen Leng, Weisheng Zhao","doi":"10.1007/s11432-024-4020-y","DOIUrl":"https://doi.org/10.1007/s11432-024-4020-y","url":null,"abstract":"This work demonstrates a high-precision in-plane two-axis GMR angle sensor is prepared by post-annealing. The pinning direction of the GMR strips is modulated by annealing two times to achieve orthogonal sensitive directions of the two sensors. The sensitivity of a full-bridge sensor is 6.59 mV/V/mT, with the sensing direction along the Y-axis and the sensitivity of a half-bridge GMR sensor is 1.68 mV/V/mT with the sensing direction along the X-axis. A simulation of the two-axis sensor output with the field has been performed, which proves the correctness of the P2 direction measured by the angle test. The detectivity of the full-bridge sensor is 22 nT/(Hz)0.5 at 10 Hz and it is 88 nT/(Hz)0.5 at 10 Hz for half-bridge sensor. The orthogonality error of the two-axis sensor for the geomagnetic angle detection is lower than 0.04. The sensor in this study demonstrates higher detectivity than some commercial GMR sensors, such as YAS532 produced by Yamaha and HSCDTD008A produced by ALPS. This work proposes an efficient and simple method for producing two-axis GMR angle sensors, which can be a promising solution for mass production.","PeriodicalId":21618,"journal":{"name":"Science China Information Sciences","volume":null,"pages":null},"PeriodicalIF":8.8,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141165580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two-layer Lagrange-based relay network topology and trajectory design for solar system explorations 基于拉格朗日的两层中继网络拓扑结构和太阳系探测的轨迹设计

IF 8.8 2区计算机科学

Science China Information Sciences Pub Date : 2024-05-23 DOI: 10.1007/s11432-023-3936-7

Jun Cao, Jian Jiao, Hao Liu, Rongxing Lu, Qinyu Zhang

引用次数: 0

Next generation multiple access for IMT towards 2030 and beyond 面向 2030 年及以后的 IMT 下一代多址接入

IF 8.8 2区计算机科学

Science China Information Sciences Pub Date : 2024-05-22 DOI: 10.1007/s11432-024-4014-x

Zhiguo Ding, Robert Schober, Pingzhi Fan, H. Vincent Poor

引用次数: 0

Progress on the program of Si-compatible two-dimensional semiconductor materials and devices 硅兼容二维半导体材料和器件计划的进展情况

IF 8.8 2区计算机科学

Science China Information Sciences Pub Date : 2024-05-21 DOI: 10.1007/s11432-024-3986-8

Mingsheng Xu, Yuwei Wang, Jiwei Liu, Deren Yang

{"title":"Progress on the program of Si-compatible two-dimensional semiconductor materials and devices","authors":"Mingsheng Xu, Yuwei Wang, Jiwei Liu, Deren Yang","doi":"10.1007/s11432-024-3986-8","DOIUrl":"https://doi.org/10.1007/s11432-024-3986-8","url":null,"abstract":"Two-dimensional (2D) materials are at the forefront of innovation, heralding a new era for next-generation electronics and optoelectronics. These materials are distinguished by their unique structural characteristics: they have no hanging bonds on their surface, exhibit weakened electrostatic shielding in the Z-direction, and boast atomic thickness in their monolayers. These features have led to groundbreaking discoveries in electrical, optical, and magnetic properties, paving the way for advancements in low-power electronics, valleytronics, infrared detectors, and memory devices. Despite these promising developments, Si-based technologies continue to dominate the landscape of next-generation electronics and optoelectronics, as well as heterogeneous integration. In response to this ongoing evolution, the National Natural Science Foundation of China (NSFC) initiated a major program in 2021 dubbed “Si-compatible two-dimensional semiconductor materials and devices”. This study reviews the progress made under the NSFC Program, spotlighting its main achievements and outlining key future research directions. Additionally, it sheds light on the challenges that researchers in the 2D domain face, particularly in developing Si-compatible 2D technologies.","PeriodicalId":21618,"journal":{"name":"Science China Information Sciences","volume":null,"pages":null},"PeriodicalIF":8.8,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141256237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vector field path following for a micro flapping-wing robot 微型拍翼机器人的矢量场路径跟踪

IF 8.8 2区计算机科学

Science China Information Sciences Pub Date : 2024-05-20 DOI: 10.1007/s11432-023-4027-x

Haifeng Huang, Yingte Liu, Tao Niu, Chang Wang, Yao Zou, Wei He

引用次数: 0

Strategies for mitigating detrimental effects in cyber-physical multiplex networks 减轻网络物理多路复用网络有害影响的策略

IF 8.8 2区计算机科学

Science China Information Sciences Pub Date : 2024-05-17 DOI: 10.1007/s11432-023-4026-0

Yudong Gong, Shenghai Yang, Sanyang Liu, Pei Wang, Yiguang Bai

引用次数: 0

Wideband chaos generation using a VCSEL with intensity modulation optical injection for random number generation 使用带有强度调制光注入的 VCSEL 生成宽带混沌，用于随机数生成

IF 8.8 2区计算机科学

Science China Information Sciences Pub Date : 2024-05-17 DOI: 10.1007/s11432-023-4002-6

Yu Huang, Shuangquan Gu, Yuhang Feng, Yigong Yang, Shuiying Xiang, Pei Zhou, Nianqiang Li

引用次数: 0

Logit prototype learning with active multimodal representation for robust open-set recognition 利用主动多模态表示的对数原型学习，实现稳健的开放集识别

IF 8.8 2区计算机科学

Science China Information Sciences Pub Date : 2024-05-17 DOI: 10.1007/s11432-023-3924-x

Yimin Fu, Zhunga Liu, Zicheng Wang

{"title":"Logit prototype learning with active multimodal representation for robust open-set recognition","authors":"Yimin Fu, Zhunga Liu, Zicheng Wang","doi":"10.1007/s11432-023-3924-x","DOIUrl":"https://doi.org/10.1007/s11432-023-3924-x","url":null,"abstract":"Robust open-set recognition (OSR) performance has become a prerequisite for pattern recognition systems in real-world applications. However, the existing OSR methods are primarily implemented on the basis of single-modal perception, and their performance is limited when single-modal data fail to provide sufficient descriptions of the objects. Although multimodal data can provide more comprehensive information than single-modal data, the learning of decision boundaries can be affected by the feature representation gap between different modalities. To effectively integrate multimodal data for robust OSR performance, we propose logit prototype learning (LPL) with active multimodal representation. In LPL, the input multimodal data are transformed into the logit space, enabling a direct exploration of intermodal correlations without the impact of scale inconsistency. Then, the fusion weights of each modality are determined using an entropybased uncertainty estimation method. This approach realizes adaptive adjustment of the fusion strategy to provide comprehensive descriptions in the presence of external disturbances. Moreover, the single-modal and multimodal representations are jointly optimized interactively to learn discriminative decision boundaries. Finally, a stepwise recognition rule is employed to reduce the misclassification risk and facilitate the distinction between known and unknown classes. Extensive experiments on three multimodal datasets have been done to demonstrate the effectiveness of the proposed method.","PeriodicalId":21618,"journal":{"name":"Science China Information Sciences","volume":null,"pages":null},"PeriodicalIF":8.8,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141256012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pyramid-resolution person restoration for cross-resolution person re-identification 用于交叉分辨率人物再识别的金字塔分辨率人物还原

IF 8.8 2区计算机科学

Science China Information Sciences Pub Date : 2024-05-16 DOI: 10.1007/s11432-023-4023-y

Chunlei Peng, Bo Wang, Decheng Liu, Nannan Wang, Xinbo Gao

引用次数: 0

Finite-time composite learning control for nonlinear teleoperation systems under networked time-varying delays 网络时变延迟下非线性远程操纵系统的有限时间复合学习控制

IF 8.8 2区计算机科学

Science China Information Sciences Pub Date : 2024-05-16 DOI: 10.1007/s11432-023-3931-0

Yana Yang, Huixin Jiang, Changchun Hua, Junpeng Li

{"title":"Finite-time composite learning control for nonlinear teleoperation systems under networked time-varying delays","authors":"Yana Yang, Huixin Jiang, Changchun Hua, Junpeng Li","doi":"10.1007/s11432-023-3931-0","DOIUrl":"https://doi.org/10.1007/s11432-023-3931-0","url":null,"abstract":"The robust finite-time synchronization control problem is investigated for master-slave networked nonlinear telerobotics systems (NNTSs) in this article. Although there have been some research achievements on finite-time control for the NNTSs, these studies are based on the strong assumptions of communication time delays or can only achieve finite-time bounded convergence even when the external forces are zero. Accordingly and in view of the importance of these issues, a novel robust composite learning adaptive control scheme rendering the finite-time master-slave synchronization is proposed in this paper. In particular, the influence of time delays on finite-time convergence of the system is analyzed by employing the multi-dimension finite-time small-gain framework. Meanwhile, in order to achieve accurate and fast estimation of uncertain parameters of the system, both the online historical and the instantaneous data of the estimation data are explored to derive the new parameter adaptive law under a more realizable interval-excitation (IE) condition. Therefore, the convergence of the position/force synchronization errors and the adaptive parameter estimation errors is obtained in finite time, and enhanced robustness of the closed-loop system will also be ensured. Finally, the superior performance of the proposed control algorithms is validated by numerical simulations and hardware experiments.","PeriodicalId":21618,"journal":{"name":"Science China Information Sciences","volume":null,"pages":null},"PeriodicalIF":8.8,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141062379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0