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2025 IEEE/SICE International Symposium on system Integration, SII 2025

作者： Ishiguro, Tatsuya Okuda, Hiroyuki Tominaga, Kenta Suzuki, Tatsuya Nagoya University Graduate School Department of Mechanical System Engineering Furo-cho Chikusa-ku Aichi Nagoya Japan Mitsubishi Electric Corporation Advanced Technology RD Center

ISBN: (纸本)9798331531614

In a merging environment where automatic and manual operations are mixed, it is important for both parties to communicate with each other. While much research has been conducted at high speeds, such as on expressways, little progress has been made at low speeds, such as on ordinary roads. In this presentation, we will experimentally observe the driving characteristics of drivers in right-angle merging at low speeds, and construct a right-angle merging model that takes negotiation into account. © 2025 IEEE.

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Chirp-free hundred-picosecond pulse fiber laser based on carbon nanotubes mode-locker

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Optics Express 2025年第7期33卷 14850-14857页

作者： Li, Weixi Jiang, Kailin Dai, Lilong Huang, Qianqian Zou, Meng Luo, Siyu Chen, Siyu Song, Yingxiong Liu, Yunqi Yan, Zhijun Mou, Chengbo Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai Institute for Advanced Communication and Data Science Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication Shanghai University Shanghai200444 China School of Optical and Electronic Information National Engineering Laboratory for Next Generation Internet Access System Huazhong University of Science and Technology Wuhan430074 China

We demonstrate a narrow bandwidth passively erbium-doped mode-locked fiber laser based on single-wall carbon nanotubes (SWCNTs). The center wavelength is 1546.61 nm. The strong filtering effect and low saturable absorber (SA) modulation depth provide advantages for a long pulse duration of 323 ps. An overall spectral bandwidth of 1.3 GHz (0.01 nm) is measured by the optical heterodyne method, representing the narrowest spectral width based on SWCNT under a single filter structure. The obtained spectral width is very close to the transform-limited bandwidth of 8 pm, indicating that the pulse is chirp-free. Meanwhile, the generation of beat signals reveals the strong coherence between pulses. The repetition frequency of the laser is 7.8 MHz, and the number of longitudinal mode locks is only 166, which is the minimum number of longitudinal mode-locking in passively mode-locked laser based on material SA. At the same time, numerical simulations further support our experimental results and reveal the pulse evolution, providing evidence that SA and filter are the key factors in the generation of chirp-free long pulse. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Saturable absorbers

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Research on flow characteristics of bearing chamber sealing system based on oil-gas two-phase flow

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Hangkong Dongli Xuebao/Journal of Aerospace Power 2025年第4期40卷

作者： Ren, Guozhe Li, Yanpeng Zhao, Huan Xu, Wenfeng Sun, Dan Yan, Yang Liaoning Key Lab of Advanced Test Technology for Aerospace Propulsion System School of Aero-engine Shenyang Aerospace University Shenyang110136 China

In order to study the oil-gas two-phase flow characteristics and oil sealing and leakage characteristics of aero-engine bearing chamber sealing system， an unsteady solution model of sealing chamber- carbon sealing structure-bearing chamber sealing system and sealing chamber-carbon sealing structure-anti-screw structure-bearing chamber sealing system based on Euler-Euler two-phase flow method was established. The experimental device of oil-gas two-phase flow in bearing chamber was designed and built. The accuracy of the solution method was verified by the experiment of oil sealing characteristics. On this basis， the oil-gas two-phase leakage flow characteristics of conventional bearing chamber sealing system and the bearing chamber sealing system with anti-screw structure under different working conditions were studied. The results showed that for the conventional bearing chamber sealing system， the higher rotational spee indicated， the greater oil leakage. The greater pressure difference also indicated the smaller oil leakage. The anti-screw structure can effectively reduce the oil leakage of the bearing chamber sealing system. When the speed was 15 000 r/min and the pressure difference was 5 kPa， the oil leakage with the anti-screw structure was reduced by more than 95% compared with the bearing chamber sealing system without the anti-screw structure. The clearance of the anti-screw structure had no obvious effect on the sealing and leakage characteristics of the oil. © 2025 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

关键词： Airships

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Performance assessment of octagonal layout based integrated photonic reservoir computing for optical channel equalization

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Optics Express 2025年第7期33卷 15814-15826页

作者： Zuo, Xiaoyan Pei, Li Bai, Bing Bai, Bowen Hu, Zhouyi Wang, Jianshuai Qu, Qi Dong, Fei Institute of Lightwave Technology Beijing Jiaotong University Ministry of Education Key Laboratory of All-Optical Networks and Modern Communication Networks Beijing100044 China Technology Co. Ltd. China State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Peking University Beijing100871 China Beijing Aerospace Institute for Metrology and Measurement Technology Beijing100076 China

Compared to electronic equalizers, the equalizers based on integrated photonic reservoir computing exhibit the advantages of large bandwidth, short latency, and low power consumption. The existing rectangular reservoir layout employs internal nodes as input and output nodes, leading to inadequate signal exchange and extra noise due to waveguide crossing. We proposed an optical channel equalizer based on an octagonal reservoir layout and verified its equalization ability. The system-level simulation of the proposed layout is conducted to investigate the impact of layout shape, node quantity, input and output port number, and weight algorithm on channel equalization performance in a 25Gbaud 4-level pulse amplitude modulation optical communication system. Results indicate that, within a transmission distance of 5-30 km, the bit error rate (BER) of the equalized signal in the proposed octagonal layout is lower than that of a rectangular layout with the same number of nodes. Specifically, at 5 km, the octagonal layout’s BER is 5 and 10 orders of magnitude lower than the rectangular layout and the feedforward equalizer, respectively. Meanwhile, the best readout algorithm, K-nearest neighbor regression, achieves an equalized BER of 7.012 × 10−14 © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Pulse amplitude modulation

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Port-controllable routing of orbital angular momentum modes using a rotatable diffractive neural network

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Science China(Physics,Mechanics & Astronomy) 2025年第6期Mechanics & Astronomy) .卷 158-167页

作者： Junmin Liu Jiafu Chen Qingji Zeng Zemin Liang Xinping Wu Xin Zhao Jiangnan Xiao Huapeng Ye Ze Dong Dianyuan Fan Shuqing Chen Institute of Microscale Optoelectronics Shenzhen University College of New Materials and New Energies Shenzhen Technology University Terahertz Technology Innovation Research Institute Shanghai Key Laboratory of Modern Optical System Terahertz Science Cooperative Innovation Center School of Optical-Electrical Computer Engineering University of Shanghai for Science and Technology Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays South China Academy of Advanced Optoelectronics South China Normal University School of Information and Electronics Beijing Institute of Technology

Orbital angular momentum(OAM) modes provide an additional orthogonal physical dimension, offering transformative potential for enhancing optical communication capacity. Despite significant progress in mode multiplexing, the development of robust communication networks faces persistent challenges, particularly in effectively routing and controlling these multiplexed channels among network nodes. To tackle these dilemmas, we propose a rotatable diffractive neural network(R-DNN) strategy and demonstrate its capability for port-controllable OAM mode routing. By leveraging the correlation between the orthogonal evolution of OAM modes in free space and phase modulations during propagation, the R-DNN precisely shapes the spatial evolution of mode fields through multiple rotatable phase layers, enabling efficient routing to specific output ports. This approach exploits the interaction of secondary wavelets with the relative states of the rotatable layers, allowing on-demand control of mode evolution paths and enhancing routing flexibility. As a proof of concept, we developed a tri-functional router that successfully directs three OAM modes to individually controllable output ports. This router achieves an average intermode crosstalk of less than-16.4 dB across three functional states, one-dimensional, two-dimensional, and cross-connected switching, while supporting the routing of 5.85 Tbit/s quadrature phase-shift keying signals. These results highlight the R-DNN's effectiveness in achieving precise and controllable OAM mode manipulation, paving the way for advanced applications in mode-multiplexed communication networks and beyond.

关键词： orbital angular momentum mode mode routing diffractive neural network

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Single‑Neuron Reconstruction of the Macaque Primary Motor Cortex Reveals the Diversity of Neuronal Morphology

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Neuroscience Bulletin 2025年第3期41卷 525-530页

作者： Siyu Li Yan Shen Yefei Chen Zexuan Hong Lewei Zhang Lufeng Ding Chao‑Yu Yang Xiaoyang Qi Quqing Shen Yanyang Xiao Pak‑Ming Lau Zhonghua Lu Fang Xu Guo‑Qiang Bi CAS Key Laboratory of Brain Function and Disease Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230026China Interdisciplinary Center for Brain Information Shenzhen-Hong Kong Institute of Brain ScienceShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Shenzhen Technological Research Center for Primate Translational Medicine Shenzhen Key Laboratory for Molecular Biology of Neural DevelopmentShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China The Key Laboratory of Biomedical Imaging Science and System Chinese Academy of SciencesShenzhen 518055China CAS Key Laboratory of Brain Connectome and Manipulation the Brain Cognition and Brain Disease InstituteShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Faculty of Life and Health Sciences Shenzhen University of Advanced TechnologyShenzhen 518107China

Dear Editor,The primary motor cortex,also known as MOp in rodents,F1,or M1 in primates[1],plays a crucial role in autonomous motor *** is interconnected with other motor control structures such as the basal ganglia,thalamus,and *** these connections,the corticostriatal system plays a significant role in functions including action selection,motor control,sequence learning,and habit formation[2].

关键词： habit formation autonomous motor controlit morphology action selectionmotor corticostriatal system neuron basal gangliathalamusand primary motor cortexalso

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A High-Power Wave Energy Harvester with Mag-Boost Mechanism 5th

A High-Power Wave Energy Harvester with Mag-Boost Mechanism

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5th International Conference on Vibration and Energy Harvesting Applications, VEH 2024

作者： Tang, Tianyi Li, Yunfei Sun, Lining Liu, Huicong State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin China School of Mechanical and Electrical Engineering Jiangsu Provincial Key Laboratory of Advanced Robotics Soochow University Suzhou China

ISBN: (纸本)9789819611904

Ocean wave energy is a widely anticipated new type of renewable energy. However, due to the ultra-low-frequency and random motion characteristics of ocean waves, effectively harnessing it presents a significant challenge. This paper proposes a Mag-Boost mechanism based on the phenomenon that the magnetic torque undergoes a sudden change when the magnetic poles of two magnets are orthogonal. This innovative mechanism, requiring just a trigger below 1 Hz, can stimulate a power-magnet to generate high-frequency oscillation without direct contact. Utilizing this mechanism, a high-power wave energy harvester (WEH) with ultra-low-frequency response capabilities has been developed. Tested on a six-degree-of-freedom platform, the WEH demonstrated a high-output power of 1.44W and a power density of 1.2 kW/m3 at a frequency of 1 Hz and an inclination angle of 30°. The peak open-circuit voltage of the WEH reached 5 V, ensuring a completely independent and stable power supply for wireless temperature and humidity sensors. Furthermore, the Mag-Boost mechanism also shows considerable potential for harvesting other forms of low-frequency environmental energy, including wind, vibration, and human kinetic energy. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Water waves

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RF-Sauron: Enabling Contact-Free Interaction on Eyeglass Using Conformal RFID Tag

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IEEE Internet of Things Journal 2025年第10期12卷 14320-14332页

作者： Yang, Baizhou Chen, Ling Peng, Xiaopeng Chen, Jiashen Tang, Yani Wang, Wei Fang, Dingyi Feng, Chao Northwest University Shaanxi Key Laboratory of Passive Internet of Things and Neural Computing School of Information Science and Technology Xi’an710127 China Northwest University Xi’an Key Laboratory of Advanced Computing and Software Security School of Information Science and Technology Xi’an710127 China College of Science Rochester Institute of Technology RochesterNY14623 United States Northwest University Xi’an Key Laboratory of Advanced Computing and System Security School of Information Science and Technology Xi’an710127 China Northwest University Shaanxi International Joint Research Centre for the Battery-Free Internet of Things School of Information Science and Technology Xi’an710127 China

Smart eyeglasses are emerging as a new medium for human-computer interaction. Existing solutions typically rely on cameras or touchpads, raising privacy invasion concerns or requiring users to physically interact with the glass frames. Here, we present RF-Sauron, a novel mid-air gesture interaction system for eyeglasses, based on radio frequency identification (RFID). The design of our RF-Sauron system involves embedding a conformal RFID tag into the eyeglass frame, where the received signals change with user gestures. We optimize the radiation gain of the tag to avoid view blockage while preserving a long working range. To discriminate different gestures, we propose an adaptively weighted multichannel fusion network to extract their respective distinctive features. To allow efficient adaptation of the pretrained network to new users, we also introduce a novel diagonal dot-product attention in our contrastive learning framework to uncover the feature similarities of different users. The proposed RF-Sauron system was evaluated through extensive experiments, demonstrating an average recognition accuracy of 98.86% across 20 users and a cross-user accuracy of 98.75%. © 2014 IEEE.

关键词： Contrastive Learning

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Unveiling the confined dispersion mechanism of nanomaterials by stereocomplex cross-linked networks in polylactic acid

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Journal of Materials Science and technology 2025年 235卷 293-301页

作者： Su, Xiaolong Pan, Qingchun Zhai, Yaling Jia, Chao Wang, Jinqi Xu, Zhe Li, Jiaxin Zhao, Jian Xiang, Hengxue Wei, Xiaoding Zhu, Meifang State Key Laboratory of Advanced Fiber Materials College of Material Science and Engineering Donghua University Shanghai201620 China State Key Laboratory for Turbulence and Complex System Department of Mechanics and Engineering Science College of Engineering Beijing Innovation Center for Engineering Science and Advanced Technology Peking University Beijing100871 China College of Material Science and Engineering Xinjiang University Urumqi830046 China

Nanomaterials are extensively utilized in a multitude of sectors, but their propensity to aggregate can considerably diminish the efficacy of functional materials. A pivotal challenge in this domain is achieving a homogenous distribution of nanomaterials, which is essential for enhancing their performance while also reducing production costs. In this work, we achieve uniform and stable dispersion of various nanomaterials through the confinement effect generated by the stereocomplex cross-linked network formed by the combination of poly (L-lactic) acid and poly (D-lactic) acid. The unique confinement effect of polylactic acid (PLA) isomers is universal and significantly enhances the dispersion of nanomaterials in both PLA solutions and films. To demonstrate the efficacy of our approach, we disperse aggregation-induced emission (AIE) molecules within PLA, which leads to the production of PLA films exhibiting improved fluorescence property. This work provides an effective solution for the preparation of nanocomposite materials that are both high-performing and cost-efficient. © 2025

关键词： Nanoclay

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Geometry-Based Stochastic MIMO Channel Model for Near-Field and Far-Field Scenarios of Integrated Sensing and Communications

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IEEE Transactions on Vehicular technology 2025年第5期74卷 6928-6940页

作者： Jin, Yunwei He, Ruisi Ai, Bo Yuan, Yuan Niu, Yong Zhang, Haoxiang Beijing Jiaotong University State Key Laboratory of Advanced Rail Autonomous Operation School of Electronics and Information Engineering Frontiers Science Center for Smart High-speed Railway System Beijing100044 China Ministry of Industry and Information Technology China Academy of Industrial Internet Beijing100804 China

Integrated sensing and communication (ISAC) has become a promising technology in current sixth-generation (6G) wireless communications due to its ability to support both communication and sensing. Existing works regarding ISAC channels mainly focus on far-field propagation conditions based on plane wave assumption. However, with the deployment of ultra-massive multiple-input multiple-output (MIMO), the far-field assumption may no longer hold, as the communication and sensing propagation distances distances may be comparable to the array aperture size. To address this issue, we propose a three-dimensional MIMO channel model that simultaneously considers near-field and far-field propagation conditions in ISAC environments. Additionally, we distinguish the communication and sensing propagation environments by employing different effective scatterer distributions. In the model, the sensing channel is divided into target sensing and environmental sensing components, whereas the communication channel is divided into line-of-sight and non-line-of-sight components. The weighted sum of each component in communication and sensing channels results in accurate channel representations. Based on the proposed model, we derive and thoroughly investigate space-time-frequency correlation function, normalized absolute error function, and channel capacity. A key observation is that the channel correlation strongly depends on scatterer distribution. In certain conditions, the sensing channel can effectively capture the behavior of the communication channel. Error function results indicate that the proposed channel model achieves fairly high accuracy in ultra-massive MIMO scenarios. These findings provide essential support for the development of ISAC systems in future 6G wireless communications. © 1967-2012 IEEE.

关键词： Stochastic systems

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