检索结果-内蒙古大学图书馆

The Journal of Machine Learning Research 2016年第1期17卷

作者： Kevin Murphy Bernhard Schölkopf Mauro Maggioni Stanislav Minsker Nate Strawn Google MPI for Intelligent Systems Departments of Mathematics Electrical and Computer Engineering and Computer Science Duke University Durham NC Department of Mathematics University of Southern California Los Angeles CA Department of Mathematics and Statistics Georgetown University Washington D.C.

High-dimensional datasets are well-approximated by low-dimensional structures. Over the past decade, this empirical observation motivated the investigation of detection, measurement, and modeling techniques to exploit these low-dimensional intrinsic structures, yielding numerous implications for high-dimensional statistics, machine learning, and signal processing. Manifold learning (where the low-dimensional structure is a manifold) and dictionary learning (where the low-dimensional structure is the set of sparse linear combinations of vectors from a finite dictionary) are two prominent theoretical and computational frameworks in this area. Despite their ostensible distinction, the recently-introduced Geometric Multi-Resolution Analysis (GMRA) provides a robust, computationally efficient, multiscale procedure for simultaneously learning manifolds and *** this work, we prove non-asymptotic probabilistic bounds on the approximation error of GMRA for a rich class of data-generating statistical models that includes "noisy" manifolds, thereby establishing the theoretical robustness of the procedure and confirming empirical observations. In particular, if a dataset aggregates near a low-dimensional manifold, our results show that the approximation error of the GMRA is completely independent of the ambient dimension. Our work therefore establishes GMRA as a provably fast algorithm for dictionary learning with approximation and sparsity guarantees. We include several numerical experiments confirming these theoretical results, and our theoretical framework provides new tools for assessing the behavior of manifold learning and dictionary learning procedures on a large class of interesting models.

关键词： dictionary learning manifold learning multi-resolution analysis robustness sparsity

来源：评论

学校读者我要写书评

暂无评论

Classifier fusion interactive software toolbox for EMG signal decomposition

Classifier fusion interactive software toolbox for EMG signa...

引用

Canadian Conference on electrical and computer engineering (CCECE)

作者： Sarbast Rasheed Daniel W. Stashuk Mohamed S. Kamel Department of Engineering The American University of Iraq Sulaimani Iraq Department of Systems Design Engineering University of Waterloo Waterloo Ontario Canada M. S. Kamel is with the Department of Electrical and Computer Engineering University of Waterloo Waterloo Ontario Canada

ISBN: (纸本)9781479958306

A classifier fusion interactive software package has been constructed for implementing the classification task in the electromyographic (EMG) signal decomposition process using the MATLAB high-level programming language and its interactive environment. The package employs classifier fusion schemes of multiple classifier combination for the purpose of fusing the decisions of a set of heterogeneous base classifiers to make a final decision that achieves improved classification performance. The base classifiers used are ensembles of error-independent certainty, fuzzy k-NN, and template matched filter classifiers. The interactive package consists of several graphical user interfaces (GUIs) to extract individual motor unit potential (MUP) waveforms from raw EMG signals; extract relevant features; classify MUPs into motor unit potential trains (MUPTs) using certainty-based, assertion-based, and similarity-based classifiers; and combine classifier decisions. The proposed software package is useful for enhancing the EMG signal analysis quality and providing a systematic approach to the EMG signal decomposition process. It worked as a very helpful environment for testing and evaluating algorithms developed for EMG signal decomposition research.

关键词： Electromyography Signal resolution Feature extraction computers Software packages Accuracy Pattern recognition

来源：评论

学校读者我要写书评

暂无评论

Computational advancement in communication circuits and systems: Proceedings of ICCACCS 2014 1

Computational advancement in communication circuits and syst...

引用

1st International Conference on Computational Advancement in Communication Circuits and systems, ICCACCS 2014

作者： Maharatna, Koushik Dalapati, Goutam Kumar Banerjee, P.K. Mallick, Amiya Kumar Mukherjee, Moumita School of Electronics and Computer Science University of Southampton Southampton United Kingdom Department of Design and Growth Institute of Materials Research and Engineering Singapore Singapore Electronics and Telecommunication Engineering Jadavpur University Kolkata West Bengal India Electronics and Electrical Communication Indian Institute of Technology Kharagpur Kharagpur West Bengal India Centre for Millimeter Wave Semiconductor Devices and Systems Defence Research and Development Organisation Kolkata West Bengal India

来源：评论

学校读者我要写书评

暂无评论

Erratum to: Amino acid PET and MR perfusion imaging in brain tumours

引用

Clinical and Translational Imaging 2017年第4期5卷 401-401页

作者： Filss, Christian P. Cicone, Francesco Shah, Nadim Jon Galldiks, Norbert Langen, Karl-Josef Institute of Neuroscience and Medicine (INM-3 INM-4) Forschungszentrum Jülich Jülich Germany Departments of Nuclear Medicine and Neurology RWTH Aachen University Clinic Aachen Germany Unit of Nuclear Medicine Department of Surgical and Medical Sciences and Translational Medicine Sapienza University of Rome Rome Italy Nuclear Medicine and Molecular Medicine Department University Hospital of Lausanne Lausanne Switzerland JARA-Jülich Aachen Research Alliance Jülich Germany Monash Institute of Medical Engineering Department of Electrical and Computer Systems Engineering and Monash Biomedical Imaging School of Psychological Sciences Monash University Melbourne Australia Department of Neurology University of Cologne Cologne Germany Center of Integrated Oncology (CIO) University of Cologne and Bonn Cologne Germany

来源：评论

学校读者我要写书评

暂无评论

The Mixed H2/H∞ Controller design Based on an Exterior-point Approach

The Mixed H2/H∞ Controller Design Based on an Exterior-poin...

引用

The Society of Instrument and Control Engineers Annual Conference 2015

作者： Yuki Imanishi Yasushi Kami Eitaku Nobuyama Department of Applied Mathematics and Physics Graduate School of Informatics Kyoto University Department of Electrical and Computer Engineering National Institute of TechnologyAkashi College Department of Systems Design and Informatics Kyushu Institute of Technology

This paper is concerned with the mixed H/H control *** general,multi-objective control problems are difficult to be solved *** is because they are not convex programming *** this paper,we propose an exterior-point approach for obtaining a feasible solution of the mixed H/H control,which produces a controller sequence starting from an infeasible region to a feasible *** feature of our algorithm is to be able to use any stabilizing controllers as an initial point.A numerical example is given to show the efficiency of our algorithm.

关键词： Exterior-point approach Gradient of H2 norm Mixed H2/H_∞ control Infeasible controller sequence

来源：评论

学校读者我要写书评

暂无评论

A flat plate with unsteady motion: Effect of angle of attack on vortex shedding 52

A flat plate with unsteady motion: Effect of angle of attack...

引用

52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014

作者： Xia, Xi Mohseni, Kamran University of Florida Departments of Mechanical and Aerospace Engineering Electrical and Computer Engineering Institution for Networked Autonomous Systems Gainesville FL 32603 United States

ISBN: (数字)9781624102561

ISBN: (纸本)9781624102561

Several previous experimental and theoretical studies have shown that leading edge vor- tex (LEV) on an airfoil or wing is crucial to lift enhancement. In our recent study, unsteady 2D potential flow theory was employed to model the flowf ield of a pitching at plate wing. A multi-vortices model was developed to model both the leading edge and trailing edge vortices (TEVs), which offered improved accuracy compared with using only single vortex at each separation location. In this paper, to improve the performance of the potential flow model, more attention is focused on the vortex shedding conditions for a at plate with rotational motion and variable angle of attack (AoA). A modified Kutta condition is proposed to address the difficulty of traditional Kutta condition in the case with rotational body motion. This modified Kutta condition is used to determine the circulation of the new added vortices at both the leading edge and trailing edge for large AoA cases;however, a relaxation of this Kutta condition is necessary at the leading edge for small AoA cases, and even at the trailing edge for cases with strong reverse flow. The circulation of the new added vortex in the cases with relaxed Kutta condition will be estimated through a 2D shear layer model. Moreover, to determine the condition of switching between the modfied Kutta condition and the relaxed vortex shedding condition, velocities are calculated and compared at both sides of the vortex shedding edges. In this way, the transition be- tween the different vortex shedding conditions is essentially determined by the physically flow field around the edges, rather than depending on arbitrary AoA or other relevant parameters. In addition, to further increase the accuracy of the flow model, a secondary vortex generation model is developed to account for the experimentally observed secondary vortices induced by the primary LEV on the surface of the at plate. The results of this simulation are then compared with availa

关键词： Angle of attack

来源：评论

学校读者我要写书评

暂无评论

Causes of blindness and vision impairment in 2020 and trends over 30 years, and prevalence of avoidable blindness in relation to VISION 2020: the Right to Sight: an analysis for the Global Burden of Disease Study (vol 2, pg 144, 2021)

引用

LANCET GLOBAL HEALTH 2021年第4期9卷 E408-E408页

作者： Steinmetz, Jaimie D. Vision and Eye Research Institute Anglia Ruskin University Cambridge United Kingdom Biomedical Informatics Seoul National University Hospital Seoul South Korea Institute for Health Metrics and Evaluation University of Washington Seattle WA United States Department of Health Metrics Sciences School of Medicine University of Washington Seattle WA United States Institute of Health Services Research Yonsei University Seoul South Korea Department of Ophthalmology University of Washington Seattle WA United States Department of Mathematics Imperial College London London United Kingdom WHO Collaborating Centre for Public Health Education and Training Imperial College London London United Kingdom Department of Primary Care and Public Health Imperial College London London United Kingdom School of Population and Global Health University of Melbourne Carlton VIC Australia School of Optometry and Vision Science UNSW Sydney NSW Australia Brien Holden Vision Institute Sydney Australia Department of Ophthalmology University of Adelaide Adelaide SA Australia Department of Parasitology and Mycology Jahrom University of Medical Sciences Jahrom Iran Department of Clinical Sciences University of Sharjah Sharjah United Arab Emirates Ophthalmic Research Center Shahid Beheshti University of Medical Sciences Tehran Iran Department of Ophthalmology Shahid Beheshti University of Medical Sciences Tehran Iran Research Institute for Endocrine Sciences Shahid Beheshti University of Medical Sciences Tehran Iran Ophthalmic Epidemiology Research Center Shahid Beheshti University of Medical Sciences Tehran Iran Health Services Management Department Qazvin University of Medical Sciences Qazvin Iran Department of Systems Populations and Leadership University of Michigan Ann Arbor MI United States Department of Medicine Sofia Ismail Memorial Medical Centre Bogura Bangladesh The Fred Hollows Foundation Sydney NSW Australia Berhan Public Health & Eye Care Consultancy Addis A

Hospital El Salvador: a novel paradigm of intensive care in response to COVID-19 in central America. Lancet Glob Health 2021;9: e241?42?In this Comment, the conflict of interest statement should have included the following: ?By virtue of their roles within a public hospital or the Ministry of Health, MB, LC, WH, and XS are government employees. The findings and conclusions in the Comment are only those of the authors.? This correction has been made as of Feb 26, 2021.

关键词：

来源：评论

学校读者我要写书评

暂无评论

HIE-FDTD Method for Simulating Tunable Terahertz Graphene Absorber

HIE-FDTD Method for Simulating Tunable Terahertz Graphene Ab...

引用

IEEE International Symposium on Antennas and Propagation

作者： Meng-Lin Zhai Hong-Li Peng Wen-Yan Yin Zhizhang (David) Chen Key Lab of Ministry of Education of China for Research of Design and EMC of High Speed Electronic Systems Shanghai Jiao Tong University Shanghai 200240 CHINA Department of Electrical and Computer Engineering Dalhousie University Halifax Nova Scotia Canada

ISBN: (纸本)9781479978168

In this paper, the hybrid implicit-explicit finite-difference time-domain (HIE-FDTD) method is proposed for efficient simulation of graphene-based absorbers at THz;there the graphene model is incorporated into the numerical methods with auxiliary differential equation (ADE) technique for solving the Maxwell's equations. Numerical simulations show that the absorption peaks of the absorbers can be tuned effectively by varying the chemical potential or layer number of the fewlayered graphene sheets.

关键词： absorbers terahertz layer number graphene simulating Numerical methods Maxwell's equations absorption ADE DAE protocol FINITE DIFFERENCE TIME DOMAIN

来源：评论

学校读者我要写书评

暂无评论

Notice of Removal: The mixed H2/H∞ controller design based on an exterior-point approach

Notice of Removal: The mixed H2/H∞ controller design based ...

引用

SICE Annual Conference

作者： Yuki Imanishi Yasushi Kami Eitaku Nobuyama Department of Applied Mathematics and Physics Graduate School of Informatics Kyoto University Kyoto Japan Department of Electrical and Computer Engineering National Institute of Technology Hyogo Japan Department of Systems Design and Informatics Kyushu Institute of Technology Fukuoka Japan

This paper is concerned with the mixed H 2 /H ∞ control problem. In general, multi-objective control problems are difficult to be solved theoretically. This is because they are not convex programming problems. In this paper, we propose an exterior-point approach for obtaining a feasible solution of the mixed H 2 /H ∞ control, which produces a controller sequence starting from an infeasible region to a feasible one. One feature of our algorithm is to be able to use any stabilizing controllers as an initial point. A numerical example is given to show the efficiency of our algorithm.

关键词：

来源：评论

学校读者我要写书评

暂无评论

An Exterior-point Approach to the Mixed H_2/H_∞ Control Problem

An Exterior-point Approach to the Mixed H_2/H_∞ Control Pro...

引用

IEEE Annual Conference on Decision and Control

ISBN: (纸本)9781479978878

The purpose of this paper is to propose an exterior-point approach to the mixed H_2/H_∞ control problems using a partial derivative of the H_2 cost function. The main contribution of this paper is to give an iterative method for obtaining a feasible solution of the problem, which produces a sequence of controller variables from the infeasible region to the feasible one. This approach has the property such that any stabilizing controller can be used as an initial point. The efficiency of our approach is shown by a numerical example which cannot be solved with the common Lyapunov variable method.

关键词： Cost function Yttrium Closed loop systems Iterative methods State feedback Informatics

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：