检索结果-内蒙古大学图书馆

2023 IEEE International Conference on Robotics and Biomimetics, ROBIO 2023

作者： Huang, Haocheng Zhang, Zhengyan Min, Zhe Meng, Max Q.-H. Song, Shuang Wang, Jiaole Harbin Institute of Technology School of Mechanical Engineering and Automation Shenzhen518055 China Shandong University School of Control Science and Engineering Jinan250061 China Southern University of Science and Technology in Shenzhen Department of Electronic and Electrical Engineering China The Chinese University of Hong Kong Department of Electronic Engineering Hong Kong Shenzhen Research Institute of the Chinese University of Hong Kong Shenzhen China

ISBN: (纸本)9798350325706

Non-rigid point set registration is an essential technique in fields such as robotics, computer vision, image-guided surgery, and augmented reality. However, effectively addressing non-rigid deformations and handling noise interference remains a significant challenge in this context. This paper introduces a novel hybrid mixture model (HMM), combining a Gaussian mixture model (GMM) to describe positional features and a Fisher mixture model (FMM) to represent orientation features. This hybrid mixture model offers a solution to the non-rigid point set registration (PSR) problem. The proposed approach iteratively optimizes model parameters through the maximum expectation (EM) algorithm. It comprehensively explores registration performance, accounting for non-rigid deformations amidst isotropic and anisotropic positional noise. The proposed approach further incorporates reliable normal vectors for evaluating orientation features. Extensive experiments on non-rigid PSR demonstrates the improvements our algorithm offers in terms of both robustness and accuracy. © 2023 IEEE.

关键词： Nonrigid point set registration partial hybrid mixture model surgical navigation

来源：评论

学校读者我要写书评

暂无评论

Adaptive Frequency Estimator Based on the Observable Canonical Form

Adaptive Frequency Estimator Based on the Observable Canonic...

引用

IEEE International Conference on Industrial technology (ICIT)

作者： Kuan Li Dejia Tang Yang He Yuansheng Zhao Hao Luoy Shanghai Aerospace Control Technology Institute Shanghai China Department of Control Science and Engineering Harbin Institute of Technology Harbin China

ISBN: (纸本)9781728119496

This paper proposes an adaptive frequency estimator based on the observable canonical form. The signal model is first constructed in the form of the state space representation and transformed into the observable canonical form. The state observer of the signal model is then designed based on the observable canonical form. In addition, the structure of the observer is analyzed in detail with respect to the number of the frequency components. The design of the frequency-related parameters in the observer is also given in a theorem, based on which the adaptive frequency estimator is proposed with three main parts including an adaptive observer, an auxiliary filter and a frequency estimator. The proposed adaptive frequency estimator is finally validated on the simulated voltage signals with different harmonics for power quality monitoring.

关键词： Adaptation models Power quality Estimation Voltage Observers Harmonic analysis Frequency estimation

来源：评论

学校读者我要写书评

暂无评论

Image Fusion Algorithm Based on Laplacian Pyramid and Principal Component Analysis Transforms 5

Image Fusion Algorithm Based on Laplacian Pyramid and Princi...

引用

5th International Conference on Computer Network, Electronic and Automation, ICCNEA 2022

作者： Li, Dangjuan Dong, Xiaoyu Wang, Kexuan Zhou, Mi Chen, Hang Su, Junhong Xi'an Technological University School of Optoelectronics Engineering Xi'an China Shaanxi Institute of Applied Physical Chemistry Science and Technology on Applied Physical Chemistry Laboratory Xi'an China Harbin Institute of Technology Department of Automation Measurement and Control Harbin China

ISBN: (数字)9781665491099

ISBN: (纸本)9781665491099

Herein, a novel image fusion algorithm based on Laplacian pyramid transform and principal component analysis (PCA) is proposed. In this algorithm, a multi-resolution transform called Laplacian pyramid transform is used to decompose the original image into sub-images. In the transform domain, the coefficients of the various sub-images are combined using a novel fusion rule that utilizes the PCA technique. Finally, the new coefficients are used in the reconstruction of the fused image. Numerical simulations are performed to test the validity and capability of the proposed fusion algorithm. The average gradient values of PCA fusion, Laplacian pyramid fusion, and the proposed fusion method, are tested, respectively. The average gradient values of the proposed method are larger than the other two methods, especially for the spectral bands over 600nm. The three methods performed a bit inferior between the 500nm and 600nm bands compared to the other spectral bands. The Laplacian pyramid transform fusion algorithm seems relatively stable, but it is obvious that the proposed fusion algorithm has a superior performance in the visible range. Moreover, the principal component of the original image was utilized, thus, preserving the spectral information of the hyperspectral image. © 2022 IEEE.

关键词： Principal component analysis

来源：评论

学校读者我要写书评

暂无评论

Strain engineering of Pt-based electrocatalysts for oxygen reaction reduction

引用

Frontiers in Energy 2024年第2期18卷 241-262页

作者： Zeyu WANG Yanru LIU Shun CHEN Yun ZHENG Xiaogang FU Yan ZHANG Wanglei WANG State Key Laboratory of Solidification Processing Atomic Control and Catalysis Engineering LaboratorySchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration National Clinical Research Center for Oral DiseasesShaanxi Key Laboratory of StomatologyDepartment of Dental MaterialsSchool of StomatologyThe Fourth Military Medical UniversityXi’an 710032China Institute of New Energy Materials and Engineering School of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China Key Laboratory of Marine Chemistry Theory and Technology(Ministry of Education) College of Chemistry and Chemical EngineeringOcean University of ChinaQingdao 266100China

Proton exchange membrane fuel cells(PEMFCs)are playing irreplaceable roles in the construction of the future sustainable energy ***,the insufficient performance of platinum(Pt)-based electrocatalysts for oxygen reduction reaction(ORR)hinders the overall efficiency of *** the surface strain of catalysts is considered an effective way to tune their electronic structures and therefore optimize catalytic *** this paper,insights into strain engineering for improving Pt-based catalysts toward ORR are elaborated in ***,recent advances in understanding the strain effects on ORR catalysts are comprehensively ***,strain engineering methodologies for adjusting Ptbased catalysts are comprehensively ***,further information on the various challenges and potential prospects for strain modulation of Pt-based catalysts is provided.

关键词： strain engineering Pt-based catalysts oxygen reduction reaction(ORR) catalytic performance proton exchange membrane fuel cells(PEMFCs)

来源：评论

学校读者我要写书评

暂无评论

Orbital maneuver strategy design based on piecewise linear optimization for spacecraft soft landing on irregular asteroids

引用

Chinese Journal of Aeronautics 2020年第10期33卷 2694-2706页

作者： Zhiwei HAO Yi ZHAO Ying CHEN Qiuhua ZHANG Department of Astronautical Science and Mechanics Harbin Institute of TechnologyHarbin 150001China Beijing Institute of Control Engineering Beijing 100190China

Recently,asteroid exploration becomes an important branch of human’s deep space *** this paper,a piecewise linear optimal orbital maneuver strategy is designed for a spacecraft soft landing on irregular-shaped ***,the space around an irregular asteroid is converted into several grid units,and the gravitational field of the asteroid is linearly fitted in each ***,the soft-landing orbital maneuver strategy design problem is formulated as a piecewise linear optimal problem,and further transferred into a family of two-point boundary value problems,which can be solved using collocation ***,a corresponding algorithm is developed to obtain the piecewise linear optimal maneuver strategy,which is proved to be able to achieve the soft-landing mission *** results show that the error of the model linearization is small enough,while the calculation efficiency is remarkably improved,and the robustness of maneuver strategy is also improved.

关键词： Irregular gravitational field Optimal control Orbital locations Piecewise linear techniques Soft landing

来源：评论

学校读者我要写书评

暂无评论

Displacement-Based Formation control with Measurement Noises

Displacement-Based Formation Control with Measurement Noises

引用

IEEE Conference on Decision and control

作者： Weiqiang Chen Liangming Chen Jie Mei Hongwei Zhang School of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen Shenzhen China Shenzhen Key Laboratory of Control Theory and Intelligent Systems Center for Control Science and Technology Southern University of Science and Technology Shenzhen China

Multi-agent formations have many practical applications. Measurement noises are inevitable in multi-agent formations, in which, however, the existing results mainly focus on special types of noises, and the analytical discussion on the effect of general noises is challenging and remains open. This motivates us to study the effect of stochastic measurement noises on displacement-based multi-agent formations, which are described by a general form of stochastic processes with finite second-order moments. First, for the case of unbiased measurement noises, a sufficient and necessary condition is derived for the existence of solutions in the stochastic dynamics of multi-agent formations. Then, several statistical features and convergence of formation errors are analyzed. In particular, for the case of unbiased measurement noises described by zero-mean wide-sense stationary processes, an upper bound on the mean square convergence of formation errors is obtained. Finally, we demonstrate the effectiveness of our theoretical results through a simulation example.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Perturbation towards easy samples improves targeted adversarial transferability 23

Perturbation towards easy samples improves targeted adversar...

引用

Proceedings of the 37th International Conference on Neural Information Processing Systems

作者： Junqi Gao Biqing Qi Yao Li Zhichang Guo Dong Li Yuming Xing Dazhi Zhang School of Mathematics Harbin Institute of Technology Department of Control Science and Engineering Harbin Institute of Technology and C 3 I Department of Electronic Engineering Tsinghua University and Frontis.AI

The transferability of adversarial perturbations provides an effective shortcut for black-box attacks. Targeted perturbations have greater practicality but are more difficult to transfer between models. In this paper, we experimentally and theoretically demonstrated that neural networks trained on the same dataset have more consistent performance in High-Sample-Density-Regions (HSDR) of each class instead of low sample density regions. Therefore, in the target setting, adding perturbations towards HSDR of the target class is more effective in improving transferability. However, density estimation is challenging in high-dimensional scenarios. Further theoretical and experimental verification demonstrates that easy samples with low loss are more likely to be located in HSDR. Perturbations towards such easy samples in the target class can avoid density estimation for HSDR location. Based on the above facts, we verified that adding perturbations to easy samples in the target class improves targeted adversarial transferability of existing attack methods. A generative targeted attack strategy named Easy Sample Matching Attack (ESMA) is proposed, which has a higher success rate for targeted attacks and outperforms the SOTA generative method. Moreover, ESMA requires only 5% of the storage space and much less computation time comparing to the current SOTA, as ESMA attacks all classes with only one model instead of seperate models for each class. Our code is available at https://***/gjq100/ESMA

关键词：

来源：评论

学校读者我要写书评

暂无评论

Perturbation Towards Easy Samples Improves Targeted Adversarial Transferability

arXiv

引用

arXiv 2024年

作者： Gao, Junqi Qi, Biqing Li, Yao Guo, Zhichang Li, Dong Xing, Yuming Zhang, Dazhi School of Mathematics Harbin Institute of Technology China Department of Control Science and Engineering Harbin Institute of Technology China C3I Department of Electronic Engineering Tsinghua University China Frontis.AI China

关键词：

来源：评论

学校读者我要写书评

暂无评论

Design and Realization of Unmanned Vehicle Autonomous Navigation System Based on Binocular Camera

Design and Realization of Unmanned Vehicle Autonomous Naviga...

引用

Computer Science, Electronic Information engineering and Intelligent control technology (CEI), IEEE International Conference on

作者： Tianxing Guo Lianlei Lin Huanyu Liu Junbao Li Department of Automatic Test and Control School of Electronics and Information Engineering Harbin Institute of Technology Harbin China Information Countermeasure Technique Institute School of Computer Science and Technology Harbin Institute of Technology Harbin China

ISBN: (数字)9798350372052

ISBN: (纸本)9798350372069

Aiming at the navigation problem of unmanned vehicles in extreme environments such as communication interference and limited GPS signals, this study proposes an autonomous navigation method based on binocular cameras. The method enables the unmanned vehicle to complete the task of localization and map building using only binocular images, without the need for other sensors or signal sources. Meanwhile, this study also proposes a local path planning obstacle avoidance method based on depth map, which, when combined with global localization information, can take into account both local obstacle avoidance and global path navigation, and can cope with random environmental changes. The system uses a single sensor for autonomous obstacle avoidance and navigation, which reduces the computational requirements and ensures the low cost of the navigation system. In order to verify the reliability and effectiveness of the system under signal-constrained conditions, the system is evaluated in a simulation environment and a real field scenario, respectively. The experimental results show that the system is able to achieve reliable localization and path planning under signal-constrained conditions.

关键词： Location awareness Navigation Reliability theory Path planning Sensor systems Sensors Collision avoidance

来源：评论

学校读者我要写书评

暂无评论

A Semi-Supervised Method Using Cycle Consistency and Multi-Perspective Dilated for Sar-to-Optical Translation

SSRN

引用

SSRN 2024年

作者： Wang, Jinyu Yang, Haitao Liu, Zhengjun Chen, Hang Department of Space Equipment The Academy of Equipment Beijing101416 China Department of Automation Measurement and Control Harbin Institute of Technology Harbin150001 China Space Engineering University China

Synthetic Aperture Radar (SAR) is a powerful imaging sensor capable of operating in any weather and at any time, despite its image interpretation poses challenges. Translating SAR images to optical (S2O) can serve as a beneficial supplement for target detection, image alignment, and image fusion. The existing S2O translation employs solely unsupervised or supervised techniques. However, the supervised method requires a substantial quantity of aligned data support, while the unsupervised method fails to guarantee the quality of image generation. This research presents a novel semi-supervised S2O generating approach that can obtain domain-level and pixel-level mapping relationships. A dual-branch cycle consistency loss has been developed to independently constrain supervised and unsupervised modules. To improve global and sparsity feature extraction, the generator combines sliding dilated convolution with multi-respective parallel branching. Using just 1100 pairs of training sets, extensive experiments have demonstrated that the suggested strategy outperforms baseline methods in both subjective and objective standards. Where FID is optimized by 23.41%, 49.25%, 48.57%, 16.73%, and 42.32% on the five land classes. © 2024, The Authors. All rights reserved.

关键词： Radar imaging

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：