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IEEE International Conference on Image Processing

作者： Zhuang Sun Li Chen Zhida Feng Xiaoming Liu School of Computer Science and Technology Wuhan University of Science and Technology Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System Wuhan University of Science and Technology

ISBN: (数字)9798350349399

ISBN: (纸本)9798350349405

In the segmentation of curve structures, the discontinuity may lead to an incomplete topological representation of the structure. The current methods for reconnecting curve structures lack physical explanations and are limited in their effectiveness in image processing. In order to address these constraints, a new algorithm for reconnecting curve structures in segmentation is proposed by combining fluid mechanics principles, especially Bernoulli’s principle and random walks. This algorithm calculates the similarity of fracture curves to find the fracture *** the energy calculation method during the reconnection process and calculated the probability of energy transfer. It adopts a biased random walk guided by the energy transfer probability in the graph until the walker reaches the target. This innovative approach provides a more comprehensive physical explanation and improves the effectiveness of image processing.

关键词： Image segmentation Fluids Accuracy Energy exchange Probability

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Machine Learning-Assisted Optimization of Direction-Finding Antenna Arrays 14th

Machine Learning-Assisted Optimization of Direction-Finding ...

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14th International Symposium on Intelligence Computation and Applications, ISICA 2023

作者： Zhang, Qing Gong, Miao Li, Gouqiong Ma, Xinyu Chen, Yiheng Zhao, Fei Zeng, Sanyou School of Computer Science Huanggang Normal University Huanggang438000 China Germany School of Mechanical Engineering and Electronic Information China University of Geosciences Wuhan430074 China Science and Technology on Blind Signal Processing Laboratory Chengdu610041 China

ISBN: (纸本)9789819743957

Antenna design is usually a complex optimization problem. It usually includes two stages. The first stage is to formulate it as an optimization problem. And then the second stage is to design an algorithm to solve the optimization problem. This paper aims to design unequally spaced antenna arrays for direction-finding, which requires cooperation among direction-finding users, antenna designers and optimizers. The paper combines the direction finding array with the optimization design and analyzes how to construct a reasonable optimization problem from the practical optimization design problem construction stage which has been neglected. A multi-objective problem is constructed by taking the direction-finding performance as the optimization objective. The mutual coupling effect causes the design of array antennas to require electromagnetic simulation to ensure the reliability of the results, which is a very time-consuming and expensive problem. Gaussian regression model is introduced into the multi-objective optimization algorithm to construct inexpensive surrogate optimization problems that reduce the number of accurate simulation evaluations. The experimental results show that the designed array meets all the requirements with good robustness while the number of simulations required is less than that of previous methods. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Antenna arrays

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Spatiotemporal deformation analysis of glaciers and surrounding landscapes in the Shishapangma region using InSAR techniques

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Journal of Mountain science 2025年第1期22卷 210-229页

作者： LIANG Wenli LIU Rui JI Qin KOU Pinglang Chongqing Key Laboratory of GIS Application School of Geography and TourismChongqing Normal UniversityChongqing 401331China National Earth System Science Data Center Beijing 100000China Chongqing Engineering Research Center of Spatial Big Data Intelligent Technology Chongqing University of Posts and TelecommunicationsChongqing 400065China Key Laboratory of Tourism Multisource Data Perception and Decision Ministry of Culture and Tourism(TMDPDMCT)Chongqing University of Posts and TelecommunicationsChongqing 400065China

Glacier dynamics in the Himalayan midlatitudes,particularly in regions like the Shishapangma,are not yet fully understood,especially the localized topographic and climatic impacts on glacier *** study analyzes the spatiotemporal characteristics of glacier surface deformation in the Shishapangma region using the Small Baseline Subset(SBAS)Interferometric Synthetic Aperture Radar(In SAR)*** analysis reveals an average deformation rate of-4.02±17.65 mm/yr across the entire study area,with glacier regions exhibiting significantly higher rates of uplift(16.87±13.20 mm/yr)and subsidence(20.11±14.55 mm/yr)compared to non-glacier *** identifies significant surface lowering on the mountain flanks and localized uplift in certain catchments,emphasizing the higher deformation rates in glacial areas compared to non-glacial *** found a strong positive correlation between temperature and cumulative deformation(correlation coefficient of 0.63),particularly in glacier areas(0.82).The research highlights the role of temperature as the primary driver of glacier wastage,particularly at lower elevations,with strong correlations found between temperature and cumulative *** also indicates the complex interactions between topographic features,notably,slope gradient,which shows a positive correlation with subsidence rates,especially for slopes below 35°.South-,southwest-,and west-facing slopes exhibit significant uplift,while north-,northeast-,and east-facing slopes predominantly ***,we identified transition zones between debris-covered glaciers and clean ice as areas of most intense deformation,with average rates exceeding 30 mm/yr,highlighting these as potential high-risk zones for *** study comprehensively analyzes the deformation characteristics in both glacier and non-glacier areas in the Shishapangma region,revealing the complex interplay of topographic,climatic,and hydrological factors influencing glacier dynamic

关键词： Glacier melting SBAS-InSAR Topographic factors Temperature change Middle Himalayas

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Design and Investigation of Frequency Selective Surface Loaded Thermoplastic Polyurethane Polymer-Based 5G Absorber

Design and Investigation of Frequency Selective Surface Load...

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2023 IEEE International Conference on Electrical, Electronics, Communication and Computers, ELEXCOM 2023

作者： Agrawal, Anjali Kumar, Anil Panwar, Ravi Indian Institute of Information Technology Design & Manufacturing Department of Electronics and Communication Engineering Jabalpur India School of Materials Science and Technology Indian Institute of Technology Bhu High-Frequency Materials and Structures Laboratory Varanasi India

ISBN: (纸本)9798350305111

In the past few years, numerous efforts have been undertaken towards the development of microwave absorbers that are simple, broadband, angularly stable, lightweight, conformal, and unaffected by polarization effects. This work comprises a single-layer decagonal ring-shaped frequency selective surface (FSS) loaded thermoplastic polyurethane polymer-based absorber for the mm-wave band. The designed absorber with a dielectric substrate having a thickness of only 1.7 mm achieves a -10 dB reflection coefficient (RC) bandwidth of 5.5 GHz (23-28.5 GHz) for the normal angle of incidence. Furthermore, the proposed absorber shows a minimum RC of -28 dB at 26 GHz centre or resonant frequency. Moreover, the surface current distributions at a resonant frequency of the proposed microwave absorber are also investigated. The presented absorber is lightweight, flexible, polarization insensitive, angularly stable, and suitable for 5G applications. © 2023 IEEE.

关键词： Frequency selective surfaces

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Deciphering theαrelaxation and the anelastic-to-plastic transition in the deep glassy state

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science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 131-138页

作者： Qi Hao Guanghui Xing Eloi Pineda Claudio Fusco Laurent Chazeau Jean-Marc Pelletier Yunjiang Wang Yong Yang Jichao Qiao School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an710072China Department of Physics Institute of Energy TechnologiesUniversitat Politècnica de CatalunyaBarcelona08019Spain Univ Lyon INSA LyonUniversitéClaude Bernard Lyon 1CNRSMATEISUMR5510Villeurbanne69621France State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing100190China School of Engineering Science University of Chinese Academy of SciencesBeijing100049China Department of Mechanical Engineering College of EngineeringCity University of Hong KongHong Kong999077China Department of Materials Science and Engineering College of EngineeringCity University of Hong KongHong Kong999077China State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Northwestern Polytechnical UniversityXi’an710072China Key Laboratory of Aircraft Structural Integrity Ministry of Industry and Information TechnologyXi’an710072China

In contrast to their conventional crystalline counterparts,amorphous solids exhibit diverse dynamic relaxation mechanisms under external *** challenge to understanding their behavior lies in unifying microscopic dynamics,relaxation,and macroscopic *** study establishes a potential link by quantifying the characteristic time of the anelastic-to-plastic transition through dynamic mechanical relaxation and stress relaxation tests across a wide temperature range in both the supercooled liquid and the glassy *** is found that the stress relaxation time in the glassy solids follows an Arrhenius relationship,aligning with the mainαrelaxation time,and unveils a finding:αrelaxation continues to govern deformation even below the glass transition,challenging previous assumptions of the role of secondaryβrelaxation.A hierarchically constrained atomic dynamics model rationalizes the temperature dependence ofαrelaxation and the transition fromβtoαrelaxation,also providing evidence that the stretched exponent in the Kohlrausch-Williams-Watts equation can serve as an order *** work highlights the role ofαrelaxation in the glassy state and contributes to elucidating the potential correlation between relaxation and deformation in amorphous materials.

关键词： dynamic relaxation nonelastic deformation metallic glasses aging

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NumbOD: A Spatial-Frequency Fusion Attack Against Object Detectors

arXiv

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arXiv 2024年

作者： Zhou, Ziqi Li, Bowen Song, Yufei Yu, Zhifei Hu, Shengshan Wan, Wei Zhang, Leo Yu Yao, Dezhong Jin, Hai National Engineering Research Center for Big Data Technology and System China Services Computing Technology and System Lab China Cluster and Grid Computing Lab Hubei Engineering Research Center on Big Data Security China Hubei Key Laboratory of Distributed System Security China School of Computer Science and Technology Huazhong University of Science and Technology China School of Cyber Science and Engineering Huazhong University of Science and Technology China School of Information and Communication Technology Griffith University Australia

With the advancement of deep learning, object detectors (ODs) with various architectures have achieved significant success in complex scenarios like autonomous driving. Previous adversarial attacks against ODs have been focused on designing customized attacks targeting their specific structures (e.g., NMS and RPN), yielding some results but simultaneously constraining their scalability. Moreover, most efforts against ODs stem from image-level attacks originally designed for classification tasks, resulting in redundant computations and disturbances in object-irrelevant areas (e.g., background). Consequently, how to design a model-agnostic efficient attack to comprehensively evaluate the vulnerabilities of ODs remains challenging and unresolved. In this paper, we propose NumbOD, a brand-new spatial-frequency fusion attack against various ODs, aimed at disrupting object detection within images. We directly leverage the features output by the OD without relying on its internal structures to craft adversarial examples. Specifically, we first design a dual-track attack target selection strategy to select high-quality bounding boxes from OD outputs for targeting. Subsequently, we employ directional perturbations to shift and compress predicted boxes and change classification results to deceive ODs. Additionally, we focus on manipulating the high-frequency components of images to confuse ODs' attention on critical objects, thereby enhancing the attack efficiency. Our extensive experiments on nine ODs and two datasets show that NumbOD achieves powerful attack performance and high stealthiness. Copyright © 2024, The Authors. All rights reserved.

关键词： Object detection

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Daily behavior recognition of cattle based on dynamic region image features in open environment 3

Daily behavior recognition of cattle based on dynamic region...

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3rd International Conference on information science, Parallel and Distributed systems, ISPDS 2022

作者： Fu, Rao Fang, Jiandong Zhao, Yudong School of Information Engineering Inner Mongolia University of Technology Hohhot China Key Laboratory of Perception Technology and Intelligent System of Inner Mongolia Autonomous Region Hohhot China

ISBN: (数字)9781665487474

ISBN: (纸本)9781665487474

In order to recognize the daily behaviors of cattle in an open environment, the daily behaviors of cattle were classified based on the image features in the dynamic region. Firstly, the target detection model was used to locate the cattle feature parts in the dynamic region of the image, and the image features in the dynamic region were extracted according to the label information of the feature parts, then, the deep neural network was used to classify the image features. Finally, the results show that in the open environment, the accuracy of the model in predicting the feeding, lying and standing behaviors of cattle was 84%. © 2022 IEEE.

关键词： Deep neural networks

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Plant Digital Twins Based on Model Phenotyping and Functional-Structural Plant Modeling 4

Plant Digital Twins Based on Model Phenotyping and Functiona...

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4th IEEE International Conference on Digital Twins and Parallel Intelligence, DTPI 2024

作者： Liu, Zhiqing Wang, Xiujuan Hua, Jing Wang, Haoyu Huo, Qirun Kang, Mengzhen Capital Normal University Information Engineering College Beijing China Institute of Automation Chinese Academy of Sciences State Key Laboratory of Multimodal Artificial Intelligence Systems Beijing China Macau University of Science and Technology Faculty of Innovation Engineering China

ISBN: (纸本)9798350349252

In this digital age, digital twin technology has been widely applied in various fields. However, its use in agriculture is still in the early stages. Existing literature on plant digital twins indicates that they have a limited capacity to interact with real plants or to predict the complete plant growth process. This paper aims to propose a new approach to plant digital twin by combining them with actual plant phenotyping technology. By obtaining plant phenotypic data and integrating them with the plant model, we aim at predicting the entire plant growth process, thereby achieving a dynamic plant digital twin. © 2024 IEEE.

关键词： Plant diseases

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X-FMAS Beamforming Method for 3D Imaging Using Row-Column Addressed Array

X-FMAS Beamforming Method for 3D Imaging Using Row-Column Ad...

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2023 IEEE International Ultrasonics Symposium, IUS 2023

作者： Sun, Qiandong Fu, Yapeng Xu, Kailiang Fudan University Center for Biomedical Engineering School of Information Science and Technology Shanghai China Fudan University State Key Laboratory of Integrated Chips and Systems Shanghai China

ISBN: (纸本)9798350346459

Row column addressed (RCA) array have been considered as an efficient solution for ultrafast 3D ultrasound imaging in large field of view with significant reduction of channels. Due to lacking of focusing process, the coherent compounding of orthogonal plane wave (OPW) was developed for RCA array to obtain isotropic point spread function (PSF) by transmission with the rows and orthogonal reception with the columns or vice versa. In this work, we proposed X-FMAS beamforming technique, a method based on the spatial coherence of the complementary image frames and orthogonal reception apertures of RCA probe, to obtain lower side-lobe level of PSF and then higher contrast-to-noise ratio (CNR) of ultrasound images. The simulated results of PSF show that the X-FMAS technique provides a 35dB reduction of side-lobe level compared with OPW, and it was found in phantom experiments that 10dB and 4dB gain of CNR of power Doppler images compared with OPW and XDoppler can be obtained using the X-FMAS method. © 2023 IEEE.

关键词： Beamforming

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Bilateral Dense Feature Circulation for Small Object Detection 43

Bilateral Dense Feature Circulation for Small Object Detecti...

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43rd Chinese Control Conference, CCC 2024

作者： Duan, Junzhu Li, Fangyu Han, Honggui Beijing University of Technology Faculty of Information Technology Beijing100124 China Beijing University of Technology Beijing Key Laboratory of Computational Intelligence and Intelligent System Beijing100124 China Beijing University of Technology Engineering Research Center of Digital Community Ministry of Education Beijing100124 China Beijing Artificial Intelligence Institute Beijing University of Technology Beijing100124 China

ISBN: (纸本)9789887581581

Object detection is the task of classifying and locating objects. Deep learning-based object detection is the current mainstream, however, detecting small scale targets is still challenging. To achieve accurate detection of small objects, we propose a bilateral dense feature circulation method (BCM). First, to make the network strategically extract features that contain useful location information, we design a bilateral feature circulation module in a dense nested way to detect small objects. Second, in order to fully utilize and fuse each scale feature, we sequentially perform the channel and spatial attention to each layer in the feature fusion stage. Third, through repetitive and progressive feature extraction and fusion under the instruction of the attention module, we attain sufficient information to detect small objects. We conducted experiments on PASCAL VOC and Tsinghua-Tencent 100k. The experiment results show that the proposed model improves the mAP of small objects on PASCAL VOC by 1.8% and Tsinghua-Tencent 100k by 2.7% compared with SOTA methods. © 2024 Technical Committee on Control Theory, Chinese Association of Automation.

关键词： Feature extraction

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