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ELLIPSOID: 作品数：108被引量：133H指数：6; 导出分析报告; 相关领域：理学更多>>; 相关作者：陈家奇顾国超高雁刘洪波刘斌更多>>; 相关机构：上海交通大学中国科学院长春光学精密机械与物理研究所大连大学附属中山医院大连理工大学更多>>; 相关期刊：更多>>; 相关基金：国家自然科学基金国家高技术研究发展计划国家重点基础研究发展计划北京市自然科学基金更多>>

ON LEGENDRE AND LYZ ZELLIPSOIDS: 《Acta Mathematica Scientia》2025年第1期180-188,共9页Xinbao LU Ge XIONGG Jiangyan TAO; supported by the NSFC(12271407).; We study the Legendre ellipsoid and the LYZ ellipsoid.First,we give a direct proof of the Cramer-Rao inequality for convex bodies.Second,we prove that origin-centered ellipsoids are the only convex bodies with identic...; 关键词：Legendre ellipsoid LYZ ellipsoid Lowner ellipsoid

Individual tree segmentation in occluded complex forest stands through ellipsoid directional searching and point compensation: 《Forest Ecosystems》2024年第6期832-847,共16页Qingjun Zhang Shangshu Cai Xinlian Liang; supported by the National Natural Science Foundation of China(Nos.32171789,32211530031,12411530088);the National Key Research and Development Program of China(No.2023YFF1303901);the Joint Open Funded Project of State Key Laboratory of Geo-Information Engineering and Key Laboratory of the Ministry of Natural Resources for Surveying and Mapping Science and Geo-spatial Information Technology(2022-02-02);Background Resources Survey in Shennongjia National Park(SNJNP2022001);the Open Project Fund of Hubei Provincial Key Laboratory for Conservation Biology of Shennongjia Snub-nosed Monkeys(SNJGKL2022001).; Terrestrial laser scanning(TLS)accurately captures tree structural information and provides prerequisites for treescale estimations of forest biophysical attributes.Quantifying tree-scale attributes from TLS point clo...; 关键词：Terrestrial laser scanning Individual tree segmentation GRAPH The shortest path Ellipsoid directional searching Point compensation

Laboratory visualization of damage asymmetry formation of rock fracture via acoustic emission and digital imaging correlation: 《Journal of Rock Mechanics and Geotechnical Engineering》2024年第11期4480-4490,共11页Qiquan Xiong Qing Lin Yue Gao Yanhui Han Jesse C.Hampton; Rock fracture mechanics and accurate characterization of rock fracture are crucial for understanding a variety of phenomena interested in geological engineering and geoscience.These phenomena range from very large-sca...; 关键词：Shear fracture Dynamics of fracture Acoustic emission Digital image correlation Uncertainty analysis Error ellipsoid

Relationship between self-propelled velocity and Brownian motion for spherical and ellipsoid particles: 《Chinese Physics B》2024年第11期305-311,共7页Jingwen Wang Ming Xu Deming Nie; Project supported by the National Natural Science Foundation of China(Grant Nos.12372251 and 12132015);the Fundamental Research Funds for the Provincial Universities of Zhejiang(Grant No.2023YW69).; The Brownian motion of spherical and ellipsoidal self-propelled particles was simulated without considering the effect of inertia and using the Langevin equation and the diffusion coefficient of ellipsoidal particles ...; 关键词：Brown motion self-propelled particle orientation movement

Stereoscopic spatial graphical method of Mueller matrix:Global‑Polarization Stokes Ellipsoid: 《Frontiers of Optoelectronics》2024年第3期113-128,共16页Xinxian Zhang Jiawei Song Jiahao Fan Nan Zeng Honghui He Valery V.Tuchin Hui Ma; the Science and Technology Research Program of Shenzhen(Nos.JCYJ20200109142820687 and JCYJ20210324120012035);the Cross-research Innovation Fund of the International Graduate School at Shenzhen,Tsinghua University(No.JC2021002);the Russian Science Foundation(No.23-14-00287).; A Mueller matrix covers all the polarization information of the measured sample,however the combination of its 16 elements is sometimes not intuitive enough to describe and identify the key characteristics of polariza...; 关键词：Full polarization Mueller matrix Tissue characterization Optical measurement

EPASAD:ellipsoid decision boundary based Process-Aware Stealthy Attack Detector被引量：1: 《Cybersecurity》2024年第3期32-48,共17页Vikas Maurya Rachit Agarwal Saurabh Kumar Sandeep Shukla; Due to the importance of Critical Infrastructure(Cl)in a nation's economy,they have been lucrative targets for cyber attackers.These critical infrastructures are usually Cyber-Physical Systems such as power grids,wate...; 关键词：Intrusion detection system Critical infrastructure security Industrial control system Machine learning

Extracting Eye Models from MRI Scans Using U-Net-Based Deep Learning Framework: 《Journal of Computer and Communications》2024年第11期95-107,共13页Waqar Ahmad Tahir Opeyemi Sheu Alamu Dip Sarker Md Tafhimul Haque Sadi Abdullah Al Hasib Tonmoy Kumar Sarker Md Rakibul Islam Dipankar Roy Dip Ashish Sharma Syed Wajeeh Abbas Rizvi; .Abstracting eye models from MRI images is critical in advancing medical imaging, particularly for clinical diagnostics. Current methods often struggle with accuracy and efficiency, highlighting a gap this research ai...; 关键词：Eye Model Extraction U-Net Deep Learning MRI Segmentation Ellipsoid and Non-Linear Models Mean Squared Error(MSE)

Optimal rejection of bounded perturbations in linear leader-following consensus protocol:invariant ellipsoid method: 《Science China(Information Sciences)》2024年第8期20-30,共11页Siyuan WANG Andrey POLYAKOV Min LI Gang ZHENG Driss BOUTAT; supported by National Natural Science Foundation of China (Grant No. 62073081);Project Op Medibot, FEDER Medibot, and China Scholarship Council (Grant No. 202106160022); The objective of the invariant ellipsoid method is to minimize the smallest invariant and attractive set of a linear control system operating under the influence of bounded external disturbances. This study extends th...; 关键词：multi-agent system leader-following consensus invariant ellipsoid disturbance

Probabilistic-Ellipsoid Hybrid Reliability Multi-Material Topology Optimization Method Based on Stress Constraint: 《Computer Modeling in Engineering & Sciences》2024年第7期757-792,共36页Zibin Mao Qinghai Zhao Liang Zhang; supported by the National Natural Science Foundation of China(Grant 52175236).; This paper proposes a multi-material topology optimization method based on the hybrid reliability of the probability-ellipsoid model with stress constraint for the stochastic uncertainty and epistemic uncertainty of m...; 关键词：Stress constraint probabilistic-ellipsoid hybrid topology optimization reliability analysis multi-material design

Adaptive Space Expansion for Fast Motion Planning: 《IEEE/CAA Journal of Automatica Sinica》2024年第6期1499-1514,共16页Shenglei Shi Jiankui Chen; supported in part by the National Natural Science Foun-dation of China(51975236);the National Key Research and Development Program of China(2018YFA0703203);the Innovation Project of Optics Valley Laboratory(OVL2021BG007)。; The sampling process is very inefficient for sam-pling-based motion planning algorithms that excess random sam-ples are generated in the planning space.In this paper,we pro-pose an adaptive space expansion(ASE)approac...; 关键词：Adaptive space expansion(ASE) hyper-ellipsoid ring informed sampling motion planning.

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