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arXiv 2022年

作者： Zheng, Shiqi Shi, Peng Zhang, Huiyan the School of Automation China University of Geosciences Hubei key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan China the School of Electrical and Electronic Engineering The University of Adelaide AdelaideSA5005 Australia the College of Engineering and Science Victoria University MelbourneVIC8001 Australia the National Research Base of Intelligent Manufacturing Service Chongqing Technology and Business University Chongqing400067 China

This study focuses on periodic event-triggered (PET) cooperative output regulation problem for a class of nonlinear multi-agent systems. The key feature of PET mechanism is that event-triggered conditions are required to be monitored only periodically. This approach is beneficial for Zeno behavior exclusion and saving of battery energy of onboard sensors. At first, new PET distributed observers are proposed to estimate the leader information. We show that the estimation error converges to zero exponentially with a known convergence rate under asynchronous PET communication. Second, a novel PET output feedback controller is designed for the underlying strict feedback nonlinear multi-agent systems. Based on a state transformation technique and a local PET state observer, the cooperative semi-global output regulation problem can be solved by the proposed new control design technique. Simulation results of multiple Lorenz systems illustrate that the developed control scheme is effective. © 2022, CC BY.

关键词： Multi agent systems

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优化光学亚像素定位精度极限——揭示小的像素相位效应（英文）

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Engineering 2023年第8期 140-149页

作者： Haiyang Zhan Fei Xing Jingyu Bao Ting Sun Zhenzhen Chen Zheng You Li Yuan Department of Precision Instrument Tsinghua University State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua University Beijing Advanced Innovation Center for Integrated Circuits Tsinghua University Joint International Research Laboratory of Advanced Photonics and Electronics Beijing Information Science and Technology University Beijing Institute of Control Engineering

Subpixel localization techniques for estimating the positions of point-like images captured by pixelated image sensors have been widely used in diverse optical measurement fields. With unavoidable imaging noise, there is a precision limit(PL) when estimating the target positions on image sensors, which depends on the detected photon count, noise, point spread function(PSF) radius, and PSF's intra-pixel *** studies have clearly reported the effects of the first three parameters on the PL but have neglected the intra-pixel position information. Here, we develop a localization PL analysis framework for revealing the effect of the intra-pixel position of small PSFs. To accurately estimate the PL in practical applications, we provide effective PSF(e PSF) modeling approaches and apply the Cramér–Rao lower bound. Based on the characteristics of small PSFs, we first derive simplified equations for finding the best PL and the best intra-pixel region for an arbitrary small PSF; we then verify these equations on real PSFs. Next, we use the typical Gaussian PSF to perform a further analysis and find that the final optimum of the PL is achieved at the pixel boundaries when the Gaussian radius is as small as possible, indicating that the optimum is ultimately limited by light diffraction. Finally, we apply the maximum likelihood method. Its combination with e PSF modeling allows us to successfully reach the PL in experiments, making the above theoretical analysis effective. This work provides a new perspective on combining image sensor position control with PSF engineering to make full use of information theory, thereby paving the way for thoroughly understanding and achieving the final optimum of the PL in optical localization.

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Recent progress on photo-driven heterogeneous persulfate activation process induced by Fe-based materials

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Journal of Environmental Chemical Engineering 2025年第3期13卷

作者： Geng, Zhenxiang Liu, Shiyu Zhou, Xuerong Qin, Lei Xu, Fuhang Huo, Xiuqin Ma, Dengsheng Fan, Xing He, Wuqiang Lai, Cui College of Environmental Science and Engineering Hunan University Hunan Changsha410082 China Key Laboratory of Environmental Biology and Pollution Control Hunan University Ministry of Education Hunan Changsha410082 China College of Materials and Advanced Manufacturing Hunan University of Technology Zhuzhou412007 China

The photo-driven heterogeneous persulfate (PS) activation (PHPA) process, which involves irradiating water with visible light and activating PS using solid catalysts, has been widely investigated for water treatment. Various Fe-based materials are commonly utilized as transition metal catalysts in the process of PHPA. Due to their environmental friendliness and versatility, they are the most commonly used. Hence, this review is dedicated to offering an in-depth examination review of the PHPA process induced by Fe-based materials, including the application of a variety of heterogeneous Fe-based catalysts in the elimination of organic contaminants, with particular attention on mechanism involved under both dark and light condition. Meanwhile, strategies for enhancing the PHPA process, such as photoelectricity coupling, photoexcited dye coupling, co-catalyst coupling, and photothermal coupling, have been systematically summarized and compared. Finally, this review emphasizes the tremendous potential of Fe-based materials induced PHPA process for organic contaminant removal and evaluates the future challenges and opportunities of this process. In conclusion, the photo-driven heterogeneous persulfate activation process induced by Fe-based materials have bright future on water treatment field but still have problems on large scale applications (such as the large-scale preparation methods of heterogeneous catalysts and secondary contamination of sulfate ions) © 2025 Elsevier Ltd.

关键词： Crystal impurities

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Deep Learning-Based Object Pose Estimation: A Comprehensive Survey

arXiv

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arXiv 2024年

作者： Liu, Jian Sun, Wei Yang, Hui Zeng, Zhiwen Liu, Chongpei Zheng, Jin Liu, Xingyu Rahmani, Hossein Sebe, Nicu Mian, Ajmal The National Engineering Research Center for Robot Visual Perception and Control Technology College of Electrical and Information Engineering the State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Changsha410082 China The School of Architecture and Art Central South University Changsha410082 China The Department of Automation Tsinghua University Beijing100084 China The School of Computing and Communications Lancaster University LA1 4YW United Kingdom The Department of Information Engineering and Computer Science University of Trento Trento38123 Italy The Department of Computer Science The University of Western Australia WA6009 Australia

Object pose estimation is a fundamental computer vision problem with broad applications in augmented reality and robotics. Over the past decade, deep learning models, due to their superior accuracy and robustness, have increasingly supplanted conventional algorithms reliant on engineered point pair features. Nevertheless, several challenges persist in contemporary methods, including their dependency on labeled training data, model compactness, robustness under challenging conditions, and their ability to generalize to novel unseen objects. A recent survey discussing the progress made on different aspects of this area, outstanding challenges, and promising future directions, is missing. To fill this gap, we discuss the recent advances in deep learning-based object pose estimation, covering all three formulations of the problem, i.e., instance-level, category-level, and unseen object pose estimation. Our survey also covers multiple input data modalities, degrees-of-freedom of output poses, object properties, and downstream tasks, providing the readers with a holistic understanding of this field. Additionally, it discusses training paradigms of different domains, inference modes, application areas, evaluation metrics, and benchmark datasets, as well as reports the performance of current state-of-the-art methods on these benchmarks, thereby facilitating the readers in selecting the most suitable method for their application. Finally, the survey identifies key challenges, reviews the prevailing trends along with their pros and cons, and identifies promising directions for future research. We also keep tracing the latest works at Awesome-Object-Pose-Estimation. Copyright © 2024, The Authors. All rights reserved.

关键词： Benchmarking

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Nonreciprocal thermal radiation based on Fibonacci quasi-periodic structures

arXiv

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arXiv 2021年

作者： Wu, Jun Wu, Feng Zhao, Tiancheng Zhai, Han Wu, Xiaohu Key Laboratory of Advanced Perception and Intelligent Control of High-end Equipment Ministry of Education College of Electrical Engineering Anhui Polytechnic University Wuhu241000 China School of Optoelectronic Engineering Guangdong Polytechnic Normal University Guangzhou510665 China Beijing Aerospace Institute for Metrology and Measurement Technology Beijing100076 China Shandong Institute of Advanced Technology Jinan250100 China

To violate Kirchhoff's law is very important in the areas of thermal radiation. However, due to the weak nonreciprocity in natural materials, it is necessary to engineer novel structures to break the balance between emission and absorption. In this work, we introduce magneto-optical material into Fibonacci photonic crystals. Assisted by the nonreciprocity of the magneto-optical material and the excitation of Tamm plasmon polaritons, strong nonreciprocal thermal radiation can be realized. The difference between absorption and emission at wavelength of 16 μm can reach 0.9 at the incident angle of 60o. The distributions of the magnetic field are also calculated to verify the underlying physical origin. By engineering the parameters of the structure, it is found that strong nonreciprocal thermal radiation can be achieved at shorter wavelength and smaller incident angle. The results indicate that the Fibonacci magnetophotonic crystals are the promising candidate to engineer the nonreciprocal emission for various requirements. Copyright © 2021, The Authors. All rights reserved.

关键词： Heat radiation

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Natural van der Waals canalization lens for non-destructive nanoelectronic circuit imaging and inspection

arXiv

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arXiv 2025年

作者： Ou, Qingdong Xue, Shuwen Ma, Weiliang Yang, Jiong Si, Guangyuan Liu, Lu Zhong, Gang Liu, Jingying Xie, Zongyuan Xiao, Ying Kalantar-Zadeh, Kourosh Qi, Xiang Li, Peining Dai, Zhigao Chen, Huanyang Bao, Qiaoliang Faculty of Innovation Engineering Macau University of Science and Technology Macao Taipa999078 China Department of Materials Science and Engineering Monash University ClaytonVIC3800 Australia Department of Physics Xiamen University Xiamen361005 China National Engineering Research Center of Electromagnetic Radiation Control Materials Key Laboratory of Multi-spectral Absorbing Materials and Structures Ministry of Education University of Electronic Science and Technology of China Chengdu610054 China School of Optoelectronic Science and Engineering Collaborative Innovation Center of Suzhou Nano Science and Technology Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province Key Lab of Modern Optical Technologies Education Ministry of China Soochow University Suzhou215006 China Melbourne Centre for Nanofabrication Victorian Node of The Australian National Fabrication Facility ClaytonVIC3168 Australia Engineering Research Center of Nano-Geomaterials Ministry of Education Faculty of Materials Science and Chemistry China University of Geosciences Wuhan430074 China School of Chemical and Biomolecular Engineering The University of Sydney SydneyNSW Australia Hunan Key Laboratory for Micro-Nano Energy Materials and Devices School of Physics and Optoelectronic Xiangtan University Hunan411105 China Wuhan National Laboratory for Optoelectronics School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan430074 China Shenzhen Research Institute China University of Geosciences Shenzhen518063 China University of Shanghai for Science and Technology Shanghai200093 China Nanjing kLIGHT Laser Technology Co. Ltd. Jiangsu Nanjing210032 China

Optical inspection has long served as a cornerstone non-destructive method in semiconductor wafer manufacturing, particularly for surface and defect analysis. However, conventional techniques such as bright-field and dark-field scattering optics face significant limitations, including insufficient resolution and the inability to penetrate and detect buried structures. Atomic force microscopy (AFM), while offering higher resolution and precise surface characterization, is constrained by slow speed, limited to surface-level imaging, and incapable of resolving subsurface features. Here, we propose an approach that integrates the strengths of dark-field scattering optics and AFM by leveraging a van der Waals (vdW) canalization lens based on natural biaxial α-MoO3 crystals. This method enables ultrahigh-resolution subwavelength imaging with the ability to visualize both surface and buried structures, achieving a spatial resolution of 15 nm and grating pitch detection down to 100 nm. The underlying mechanism relies on the unique anisotropic properties of α-MoO3, where its atomic-scale unit cells and biaxial symmetry facilitate the diffraction-free propagation of both evanescent and propagating waves via a flat-band canalization regime. Unlike metamaterial-based superlenses and hyperlenses, which suffer from high plasmonic losses, fabrication imperfections, and uniaxial constraints, α-MoO3 provides robust and aberration-free imaging in multiple directions. We successfully applied this approach to achieve high-resolution inspection of buried nanoscale electronic circuits, offering unprecedented capabilities essential for next-generation semiconductor manufacturing. © 2025, CC BY-NC-ND.

关键词： Van der Waals forces

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Continuous Jitter Reconstruction of Dual-comb interferometer for self-referencing error correction

Continuous Jitter Reconstruction of Dual-comb interferometer...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Haoyang Yu Kai Ni Qian Zhou Xinghui Li Xiaohao Wang Guanhao Wu Division of Advanced Manufacturing Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen China State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua University Beijing China

We present a continuous jitter reconstruction method for self-referencing error correction of dual-comb interferometry. By utilizing specific interpolation and unwrap algorithm, continuous time jitter and phase jitter... 详细信息

ISBN: (数字)9781728143330

ISBN: (纸本)9781728152394

关键词： Optical interferometry Interpolation Instruments Jitter Reconstruction algorithms Lasers and electrooptics Error correction

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Dual-Comb Based Two-Dimensional Angle measurement System

Dual-Comb Based Two-Dimensional Angle Measurement System

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Conference on Lasers and Electro-Optics (CLEO)

作者： Siyu Zhou Vunam Le Kai Ni Qian Zhou Guanhao Wu Department of Precision Instrument State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua University Beijing China Division of Advanced Manufacturing Graduate School at Shenzhen Tsinghua University Shenzhen China

We present a dynamic angle measurement method based on dual-comb interferometry that can reach a precision of 0.08 arc-second with 1 kHz response speed. This method can also be applied at long stand-off distances.

ISBN: (数字)9781943580767

ISBN: (纸本)9781728144184

关键词： Satellites Gratings Optical interferometry Distance measurement Diffraction gratings Optical reflection Optical sensors

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Bills of Standard manufacturing Services (BOSS) Construction Based on focused Crawler

Bills of Standard Manufacturing Services (BOSS) Construction...

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2019 IEEE International Conference on Smart manufacturing, Industrial and Logistics Engineering, SMILE 2019

作者： Bai, Jie Fang, Shuiliang Tang, Renzhong Wu, Yifan State Key Laboratory of Fluid Power Transmission and Control College of Mechanical Engineering Zhejiang University Hangzhou China Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province College of Mechanical Engineering Zhejiang University Hangzhou China

ISBN: (纸本)9781538679982

As an advanced manufacturing model, cloud manufacturing(CMfg) has made great progress in recent years. The concept of CMfg has been introduced to many industries. With the growing diversity of products, the complexity of cloud manufacturing service encapsulation is also increasing. To solve the problem of product-oriented service standardized encapsulation, the Bills of Standard manufacturing Service(BOSS) has been proposed. It can systematically solve the problem of deployment, registration and management of cloud manufacturing services in the whole product life cycle. In this paper, based on the service ontology model, we proposed an automatic perfecting service information method of BOSS using the focused crawler technology. Combined with the case study, we verified the feasibility and effectiveness of this method. Finally, the application framework of BOSS in the cloud manufacturing system is further discussed. © 2019 IEEE.

关键词： Ontology

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Temperature Sensing Characteristics of Surface Acoustic Wave Brillouin Scattering in Optical Microfibers

Temperature Sensing Characteristics of Surface Acoustic Wave...

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Progress in Electromagnetic Research Symposium (PIERS)

作者： Yi Liu Yuanqi Gu Pengfei Chen Rongrong Guo Yao Yao Yajun You Wenjun He Xiu-Jian Chou Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province Taiyuan University of Technology 79 West Yingze Street Taiyuan China Institute of Optoelectronic Engineering College of Physics and Optoelectronics Taiyuan University of Technology 79 West Yingze Street Taiyuan China Strong Digital Technology Co. Ltd. (Thinvent) Nanchang China Key Laboratory of Instrumentation Science and Dynamic Measurement Ministry of Education North University of China 3 Xueyuan Street Taiyuan China College of Mechatronics Engineering North University of China Taiyuan China Science and Technology on Electronic Test and Measurement Laboratory School of Instrument and Electronics North University of China Taiyuan China

ISBN: (纸本)9781665409889

Abstract-Temperature sensing characteristics of surface acoustic wave Brillouin scattering in 1-1.3 $\mu\mathrm{m}$ diameter optical microfibers are simulated by using the elastodynamic equation including the electrostrictive stress. A multi-peak Brillouin gain spectrum with rather high scattering efficiency is observed. The highest temperature sensitivity of the surface acoustic mode is 0.568 MHz/°C. Meanwhile, the temperature sensitivity of the surface acoustic mode is less affected by fiber diameter changes, ranging from 0.05 to 0.25 MHz/°C/$\mu\mathrm{m}$. It can be found that using SAW BS for temperature sensing would put less stress on manufacturing constraints for optical microfibers. Moreover, the results provide guidance for the further improving the performance of temperature sensing in the microelectronics field.

关键词： Temperature sensors Optical fibers Optical fiber sensors Temperature distribution Sensitivity Surface acoustic waves Microelectronics

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