检索结果-内蒙古大学图书馆

Broadband low-frequency sound absorption of multifunctional composite metastructure

Science China(Technological Sciences) 2025年第2期68卷 114-124页

作者： Yilong YANG Shanshan LIU Yan LI Tong GAO Yongdong PAN Yong LI Yabin JIN School of Aerospace Engineering and Applied Mechanics Tongji UniversityShanghai 200092China State International Joint Research Center of Aerospace Design and Additive Manufacturing Northwestern Polytechnical UniversityXi’an 710072China Institute of Acoustics School of Physics Science and EngineeringTongji UniversityShanghai 200092China Shanghai Key Laboratory of Intelligent Sensing and Detection Technology School of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Institute of Aircraft Mechanics and Control Shanghai 200092China

In this study,we fabricated multifunctional metastructures from carbon fiber-reinforced plastic composites using additive manufacturing *** metastructures are characterized by their lightweight,load-bearing capacity,and broadband low-frequency sound absorption *** metastructure consists of 36 unit cells,and non-local coupling mechanism was considered for designing the sound absorption *** developed an acoustic impedance theory tailored for the metastructure,facilitating an analysis of thermal and viscous dissipation *** is proven theoretically and experimentally that the proposed composite metastructure can achieve a noise reduction with an average sound absorption coefficient greater than 0.9 across frequencies in the rage of 330-1500 *** also studied the metastructure’s quasi-static and cyclic compression performance,confirming its efficient absorption capabilities after cyclic *** proposed design and additive manufacturing method for composite metastructures provides a novel pathway for creating lightweight,multifunctional structures with diverse applications,such as aerospace engineering.

关键词： composite metastructure broadband sound absorption additive manufacturing

来源：评论

学校读者我要写书评

暂无评论

Performance of a four deep neural network structure in moiré fringe intelligent analysis

引用

Applied Optics 2025年第9期64卷 2208-2216页

作者： Zeng, Xinyu Chen, Yunyun Cheng, Weihao Xie, Wenzhuo Yang, Cuihong State Key Laboratory Cultivation Base of Atmospheric Optoelectronic Detection and Information Fusion Nanjing University of Information Science & Technology Nanjing210044 China Jiangsu Engineering Research Center for Intelligent Optoelectronic Sensing Technology of Atmosphere Nanjing University of Information Science & Technology Nanjing210044 China Jiangsu International Joint Laboratory on Meteorological Photonics and Optoelectronic Detection Nanjing University of Information Science & Technology Nanjing210044 China Nanjing University of Information Science & Technology Nanjing210044 China

Moiré fringe analysis holds significant importance in the assessment of flow fields, while deep learning is advancing rapidly and is frequently employed to handle complex computational challenges. In this paper, the performance of U-net, Unet++, Unet 3+, and ResUnet in moiré fringe analysis is compared and analyzed. The results indicate significant differences among the four neural networks in terms of the training time, prediction speed, prediction accuracy, and generalization capability regarding positional variations. Among the four neural networks, ResUnet exhibits the shortest training times, highest accuracy, and fastest prediction speeds while also exhibiting good generalization capability. Consequently, in practical applications, using ResUnet for moiré fringe analysis is an excellent choice. © 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： Deep neural networks

来源：评论

学校读者我要写书评

暂无评论

Highly Sensitive Lithium Niobate-Based Saw Strain Sensor With on-Chip Temperature Compensation 38

Highly Sensitive Lithium Niobate-Based Saw Strain Sensor Wit...

引用

38th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2025

作者： Cheng, Chunlong Yang, Jingwen Li, Xiaoru Tong, Tong Luo, Huahuang Meng, Zekai Ke, Qingqing Sun Yat-sen University School of Microelectronics Science and Technology Zhuhai519082 China Sun Yat-sen University Zhuhai Key Laboratory of Micro-Nano Sensing Technology and Intelligent Detection Zhuhai519082 China

ISBN: (纸本)9798331508890

We reported a surface acoustic wave (SAW) strain sensor based on 128° Y-cut lithium niobate, which was capable of exciting three modes. Based on these multiple modes, an on-chip temperature compensation scheme was therefore proposed. We conducted tests from 25 °C to 120 °C, and within 0-800 μϵ, the maximum relative error between measured strain and reference strain was only 5.8%. Additionally, after the beat frequency, linearity of strain sensing was enhanced compared to a single mode, and sensitivity was 284.07 Hz/μϵ, being two orders of magnitude higher than that of the SAW strain sensors reported in the literature with on-chip temperature compensation. © 2025 IEEE.

关键词： beat frequency lithium niobate (LN) on-chip temperature compensation Surface acoustic wave (SAW) strain sensor

来源：评论

学校读者我要写书评

暂无评论

In-Situ Saw/Baw Sensors Based on P(VDF-TRFE) for Strain and Temperature Measurement 38

In-Situ Saw/Baw Sensors Based on P(VDF-TRFE) for Strain and ...

引用

38th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2025

作者： Li, Xiaoru Cheng, Chunlong Yang, Jingwen Zhang, Guoxiang Lu, Zihan Yan, Xuefei Luo, Huahuang Meng, Zekai Ke, Qingqing Sun Yat-sen University School of Microelectronics Science and Technology Zhuhai519082 China Sun Yat-sen University Zhuhai Key Laboratory of Micro-Nano Sensing Technology and Intelligent Detection Zhuhai519082 China

ISBN: (纸本)9798331508890

The paper presents an in-situ Surface Acoustic Wave (SAW) / Bulk Acoustic Wave (BAW) sensor based on P(VDF-TrFE), which is directly integrated onto a metal surface. Characterization results confirm that the P(VDF-TrFE) film is well-suited for fabricating SAW/BAW sensors. The sensor excites multiple BAW modes, enabling temperature sensing with a maximum temperature coefficient of frequency (TCF) of 738 ppm/°C in BAW mode 3, which is six times higher than the reported in-situ BAW devices. In SAW mode 1, the TCF reaches 745 ppm/°C, almost eight times greater than the previous in-situ SAW devices. Moreover, the SAW mode 1 exhibits good linearity across a large strain measurement range of 7000 μϵ, with a sensitivity of 146 Hz/μϵ, surpassing the strain range of the reported in-situ SAW devices by nearly fourfold. Overall, the developed in-situ SAW/BAW sensor features outstanding performance in both temperature and strain sensing, which demonstrates the significant potential for multifunctional and multimodal sensing applications in structural health monitoring (SHM). © 2025 IEEE.

关键词： Acoustic waves

来源：评论

学校读者我要写书评

暂无评论

Extraction of phase information for moiré fringes based on adaptive wavelet basis frequency

引用

Applied Optics 2025年第13期64卷 3677-3683页

作者： Cao, Zi-Mu Chen, Yun-Yun Jiang, Jian Cao, Zhao-Lou State Key Laboratory Cultivation Base of Atmospheric Optoelectronic Detection and Information Fusion Nanjing University of Information Science & Technology Nanjing210044 China Jiangsu Engineering Research Center for Intelligent Optoelectronic Sensing Technology of Atmosphere Nanjing University of Information Science & Technology Nanjing210044 China Nanjing University of Information Science & Technology Nanjing210044 China Jiangsu International Joint Laboratory on Meteorological Photonics and Optoelectronic Detection Nanjing University of Information Science & Technology Nanjing210044 China

As a critical step in moiré tomography, the extraction of phase information directly impacts the accuracy and resolution of the results. In this study, an adaptive wavelet basis frequency selection method is proposed for extracting the phase information of moiré fringes. The theories of wavelet basis frequency selection are derived based on the moiré fringe intensity distribution, followed by numerical simulations that demonstrate the feasibility and reliability of our method. Subsequently, validation experiments are performed, in which the phase information obtained by the adaptive method is compared with that obtained by Fourier and ridge detection methods. The results indicate that the introduction of adaptive wavelet basis frequency selection demonstrates advantages in noise resistance, accuracy, and efficiency. Meanwhile, it exhibits greater adaptability and robustness to moiré fringes with different carrier frequencies. In summary, the introduction of adaptive wavelet basis frequency opens great possibilities for the precise analysis of complex optical fringes, which will expand the application potential of moiré tomography. © 2025 Optica Publishing Group.

关键词： Adaptive optics

来源：评论

学校读者我要写书评

暂无评论

Capacitive sensing in High-speed Molecular Communication System: A Non-invasive Interface for the Internet of Bio-Nano Things

引用

IEEE Internet of Things Journal 2025年第11期12卷 16711-16719页

作者： Huang, Xuewei Liu, Jiarui Lin, Lin Wen, Miaowen Gan, Wancheng Huang, Yu Guangzhou University Research Center of Intelligent Communication Engineering School of Electronics and Communication Engineering Guangzhou510006 China Tongji University College of Electronics and Information Engineering Shanghai201804 China School of Electronic and Information Engineering in South China University of Technology Guangdong Provincial Key Laboratory of Short-Range Wireless Detection and Communication Guangzhou510641 China

Molecular communication (MC) is a prominent technique within the Internet of Bio-nano Things (IoBNT), which aims to interconnect artificial and biological devices for pioneering healthcare applications. Despite its rapid advancements in theoretical study, the experimental development of MC is still in the infancy stage, and most existing testbeds require intruding hardware into the channel during the signal detection process, potentially harming the organism. Against this background, the non-invasive interface across the internal and external information exchange of organisms is of great necessity. Specifically, this work adopts a capacitive sensing mechanism to recover information from the sensed chemical signals. Our testbed demonstrates a notably higher transmission rate than previously reported non-invasive MC approaches, underscoring its potential to advance IoBNT research. © 2025 IEEE.

关键词： Testbeds

来源：评论

学校读者我要写书评

暂无评论

Targeted-tuning competitive acidic CO2RR via metalloid antagonism sites

引用

Materials Today 2025年 83卷 54-63页

作者： Sheng, Beibei Cao, Dengfeng Qi, Zhenghang Shou, Hongwei Xia, Yujian Su, Xiaozhi Chen, Shuangming Wu, Chuanqiang Liu, Hengjie Chimtali, Peter Joseph Chu, Yongheng Liu, Chongjing Wu, Xiaojun Song, Li National Synchrotron Radiation Laboratory CAS Center for Excellence in Nanoscience Key Laboratory of Precision and Intelligent Chemistry School of Nuclear Science and Technology University of Science and Technology of China Hefei230029 China SINOPEC Shanghai Research Institute of Petrochemical Technology Co. Ltd. Shanghai201208 China Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps College of Chemistry and Chemical Engineering Tarim University Alar843300 China School of Chemistry and Materials Science CAS Center for Excellence in Nanoscience and Synergetic Innovation of Quantum Information & Quantum Technology Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei230026 China Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA94720 United States Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai201204 China Information Materials and Intelligent Sensing Laboratory of Anhui Province Institutes of Physical Science and Information Technology Anhui University Hefei230601 China

To mitigate the high separation costs associated with conventional neutral/alkaline electrocatalysis for CO2 reduction reactions (CO2RR), acidic CO2RR offers economic advantages and improved efficiency in CO2 utilization. However, it typically involves the cleavage of M−H bonds at a relatively negative potential, leading to the predominant formation of H2 and poor HCOOH selectivity. Herein, we develop a facile solid-phase thermal diffusion approach to controllably synthesize a novel metalloid-metal single atom alloys (m-SAAs) electrocatalyst Te1Bi with unique metalloid antagonistic sites, thus enabling high-efficient acidic CO2-to-HCOOH conversion. Electrochemical test and operando synchrotron radiation multi-techniques (SRMS) characterization reveal that metalloid Te sites bring steric hindrance effect and blocks *H coupling. Furthermore, it actively adsorbs OH− species as a proton source, allowing for effective separation of protons and electrons in space. Thus, leading to enhanced hydrogenation in acidic CO2RR to produce HCOOH. The flow cell test results demonstrate that the carefully designed Te1Bi catalyst exhibits a milder reaction potential, along with higher HCOOH Faraday efficiency (∼94.5 %) and single-pass carbon efficiency (SPCE, ∼40 %) in acidic media. This work significantly expands the family of SAAs and offers a novel perspective to analyze the regulation of competitive reactions through site-specific modifications for industrial acidic CO2RR. © 2024 Elsevier Ltd

关键词： Synchrotron radiation

来源：评论

学校读者我要写书评

暂无评论

Fiber wireless seamless integrated encryption transmission scheme based on ciphertext-key double collaborative DNA reconstruction

引用

Optics Letters 2025年第9期50卷 2876-2879页

作者： Guo, Zhiruo Liu, Bo Ren, Jianxin Zhong, Qing Mao, Yaya Song, Xiumin Chen, Shuaidong Chen, Qingqing Wang, Feng Ullah, Rahat Institute of Optics and Electronics Nanjing University of Information Science & Technology Nanjing210044 China State Key Laboratory Cultivation Base of Atmospheric Optoelectronic Detection and Information Fusion Nanjing University of Information Science & Technology Nanjing210044 China Jiangsu International Joint Laboratory for Meteorological Photonics and Optoelectronic Detection Nanjing University of Information Science & Technology Nanjing210044 China Jiangsu Engineering Research Center for Intelligent Optoelectronic Sensing Technology of Atmosphere Nanjing University of Information Science & Technology Nanjing210044 China Beijing University of Posts and Telecommunications Beijing100876 China Department of Electronic Engineering Tsinghua University Beijing100084 China National Mobile Communications Research Laboratory Southeast University Nanjing210096 China Nanjing University of Posts and Telecommunications Nanjing210003 China

In this paper, a double reconstructive DNA encryption transmission scheme based on ciphertext-key coordination is proposed for a fiber wireless seamless integrated communication system. The scheme uses a 5D memristor ring chaotic system and 1D chaotic system to realize the double collaborative reconstruction encryption transmission of ciphertext-key information through DNA coding mapping rules. The key space of the chaotic system reaches 10221. This paper successfully demonstrated the transmission of 48 Gb/s encrypted 16QAM signals with 25 km standard single-mode fiber (SSMF) and 10 m wireless distance. The bit error rate (BER) of the signal can meet the hard decision forward error correction (HD-FEC) threshold @3.8 × 10−3. When the offsets of DNA masking factors are more than 1, the BER is greater than 0.4. The results show that this scheme can guarantee the security of the optical fiber wireless seamless integrated transmission system. © 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： Single mode fibers

来源：评论

学校读者我要写书评

暂无评论

All-optical synaptic devices utilizing 2D polymer film for logic operations and integrated edge computing

Cell Reports Physical Science

引用

Cell Reports Physical Science 2025年第5期6卷

作者： Li, Jinyong Bi, Jinglong Xiang, Minghan Hu, Yue Gao, Yang Zhang, Bin Xuan, Fuzhen Key Laboratory for Advanced Materials School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai 200237 China Shanghai Key Laboratory of Intelligent Sensing and Detection East China University of Science and Technology Shanghai 200237 China

Bioinspired photonic synapses with tunable plasticity are pivotal for next-generation neuromorphic systems. While inorganic oxides, perovskites, and two-dimensional (2D) materials dominate optical synapse research, 2D polymer-based counterparts remain underexplored. This study presents an all-optical synapse constructed from a large-area 2D polymer film, with all synaptic behaviors functioning in the ultraviolet (UV) and blue light regimes. key synaptic functions, such as paired-pulse facilitation/depression (PPF/PPD) and long-term potentiation/depression, are successfully simulated in this optical synapse. Furthermore, the all-optical synapse effectively performs “AND” and “OR” logic gate operations and is successfully integrated into a novel edge computing system for anomaly detection in indium tin oxide (ITO) glass. This system accurately classifies various types of damage, achieving a recognition accuracy of 98.03% across 32 conductance states during convolution operations. These findings highlight the potential of 2D polymer film-based all-optical synapses for enabling advanced logic operations and integrated edge computing applications. © 2025 The Author(s)

关键词： 2D polymer all-optical edge computing logic operations synaptic devices

来源：评论

学校读者我要写书评

暂无评论

VLF-SAR: A Novel Vision-Language Framework for Few-shot SAR Target Recognition

引用

IEEE Transactions on Circuits and Systems for Video technology 2025年

作者： Xie, Nishang Zhang, Tao Zhang, Lanyu Chen, Jie Wei, Feiming Yu, Wenxian Shanghai Jiao Tong University Shanghai Key Laboratory of Intelligent Sensing and Recognition School of Sensing Science and Engineering Shanghai200240 China Anhui University Information Materials and Intelligent Sensing Laboratory of Anhui Province Hefei230601 China 38th Research Institute of China Electronics Technology Group Corporation Hefei230094 China

Due to the challenges of obtaining data from valuable targets, few-shot learning plays a critical role in synthetic aperture radar (SAR) target recognition. However, the high noise levels and complex backgrounds inherent in SAR data make this technology difficult to implement. To improve the recognition accuracy, in this paper, we propose a novel vision-language framework, VLF-SAR, with two specialized models: VLF-SAR-P for polarimetric SAR (PolSAR) data and VLF-SAR-T for traditional SAR data. Both models start with a frequency embedded module (FEM) to generate key structural features. For VLF-SAR-P, a polarimetric feature selector (PFS) is further introduced to identify the most relevant polarimetric features. Also, a novel adaptive multimodal triple attention mechanism (AMTAM) is designed to facilitate dynamic interactions between different kinds of features. For VLF-SAR-T, after FEM, a multimodal fusion attention mechanism (MFAM) is correspondingly proposed to fuse and adapt information extracted from frozen contrastive language-image pre-training (CLIP) encoders across different modalities. Extensive experiments on the OpenSARShip2.0, FUSAR-Ship, and SAR-AirCraft-1.0 datasets demonstrate the superiority of VLF-SAR over some state-of-the-art methods, offering a promising approach for few-shot SAR target recognition. © 1991-2012 IEEE.

关键词： Polarimeters

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：