检索结果-内蒙古大学图书馆

11th Asian Conference on Computer Vision, ACCV 2012

作者： Fu, Keren Gong, Chen Yang, Jie Zhou, Yue Institute of Image Processing and Pattern Recognition Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Shanghai 200240 China

ISBN: (纸本)9783642373305

In this paper, we take the advantages of color contrast and color distribution to get high quality saliency maps. The overall procedure flow of our unified framework contains superpixel pre-segmentation, color contrast and color distribution computation, combination, final refinement and then object segmentation. During color contrast saliency computation, we combine two color systems and then introduce the using of distribution prior before saliency smoothing. It works to select correct color components. In addition, we propose a novel saliency smoothing procedure that is based on superpixel regions and is realized in color space. This processing step leads to total object being highlighted evenly, contributing to high quality color contrast saliency maps. Finally, a new refinement approach is utilized to eliminate artifacts and recover unconnected parts in the combined saliency maps. In visual comparison, our method produces higher quality saliency maps which stress out the total object meanwhile suppress background clutters. Both qualitative and quantitative experiments show our approach outperforms 8 state-of-the-art methods, achieving the highest precision rate 96% (3% improvement from the current highest), when evaluated via one of the most popular data sets [1]. Excellent content-aware image resizing also can be achieved with our saliency maps. © 2013 Springer-Verlag.

关键词： Superpixels

来源：评论

学校读者我要写书评

暂无评论

Cut-and-Fold: Automatic 3D modeling from a single image

Cut-and-Fold: Automatic 3D modeling from a single image

引用

IEEE International Conference on Multimedia and Expo Workshops (ICMEW)

作者： Guihang Wang Xuejin Chen Si Chen CAS Key Laboratory of Technology in Geo-spatial Information Processing and Application System University of Science and Technology of China Hefei Anhui China University of California San Diego La Jolla California USA

ISBN: (纸本)9781479947164

This paper presents a novel approach to automatically generate a plausible 3D model from a single outdoor image. Outdoor scene can be modeled as a set of planar billboards such as ground, sky and vertical trees or buildings. This Cut-and-Fold system takes the advantages of the statistical classification method for high-level geometric labeling of the image regions and the automatic image segmentation algorithm for detailed boundaries of the geometric regions to generate accurate geometric labeling and realistic rendering of novel views. Taking a single image as input, our method first roughly classifies each sub-region to the geometric categories: vertical, ground or sky. Then image segmentation algorithm is employed to refine the labeling results and generate accurate boundaries for the geometric regions. After cutting the image into several regions with their geometric labels, the system folds the regions into 3D billboards with accurate boundaries. The experimental results demonstrate that our method is capable of creating plausible 3D models automatically for a wide range of outdoor scenes.

关键词： Image segmentation Abstracts Labeling Indium phosphide Three-dimensional displays Solid modeling

来源：评论

学校读者我要写书评

暂无评论

Robust fault tolerant control on distributed networked control systems with quantized states

Robust fault tolerant control on distributed networked contr...

引用

World Congress on Intelligent control and Automation (WCICA)

作者： Yang Ge Jingcheng Wang Yi Zhang Kang Li Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Shanghai China Shanghai Urban-Rural Construction and Transportation Development Research Institute Shanghai China Electrical Engineering and Computer Science Queen's University Belfast Belfast UK

The distributed networked control systems are considered in this paper. Several sub-systems which are connected with each other through a communication network make up the whole system. Each sub-system has its own quantizer so that any information which needs be transmitted to other sub-systems will be quantized due to limited bandwidth. Meanwhile, the actuator faults, including outage, loss of effectiveness and stuck are also considered in our research. A mode-based state feedback controller is given in this paper to stable such NCSs and to meet the robust H-inf performance. A simulation example is proposed to illustrate the effectiveness of our method finally.

关键词： Quantization (signal) Networked control systems State feedback Closed loop systems Communication networks Actuators Fault tolerance

来源：评论

学校读者我要写书评

暂无评论

Protein folding structure optimization based on GAPSO algorithm in the off-lattice model

Protein folding structure optimization based on GAPSO algori...

引用

IEEE International Conference on Bioinformatics and Biomedicine (BIBM)

作者： Xiaoli Lin Xiaolong Zhang Department of City College Wuhan University of Science and Technology Wuhan China Hubei Key Laboratory of Intelligent Information Processing and Real-time Industrial System Wuhan University of Science and Technology Wuhan China

ISBN: (纸本)9781479956708

Predicting the spacial folding structure of a protein, given its sequence of amino acids, is one of the central problems in computational biology field. This paper studies the AB off-lattice model with two species of monomers, called hydrophobic (A) and hydrophilic (B). Based on this simplified model, the low energy configurations are searched by using the GAPSO. A kind of optimization about the mutation mechanism and the Euclidean interference mechanism are presented, where a novel local adjustment strategy is also used to enhance the searching ability of the global minimum within the AB off-lattice model. Starting from random conformations, the GAPSO method can find the low-energy conformation of the Fibonacci sequences and the real protein sequences. Compared with other optimization methods, the proposed novel method could converge to the lower energy folds. It appears that the proposed method can used for solving protein folding problem, which is based on the thermodynamic hypothesis.

关键词： Proteins Amino acids Interference Particle swarm optimization Optimization Sociology Statistics

来源：评论

学校读者我要写书评

暂无评论

Multi-rate model predictive control to reject periodic disturbance with reduced ripple

Multi-rate model predictive control to reject periodic distu...

引用

3rd IFAC Conference on Intelligent control and Automation Science, ICONS 2013

作者： Jin, Mengke Li, Dewei Xi, Yugeng Department of Automation Shanghai Key Laboratory of System Control and Information Processing Shanghai Jiao Tong University 200240 China

ISBN: (纸本)9783902823458

Repetitive model predictive control is an effective method to track a periodic signal as well as reject a periodic disturbance. However, since repetitive controller uses discrete-time model, there always exists ripple when controlling a continuous system with periodic disturbance. This paper proposes a new way for repetitive model predictive control by using multi-rate model. Due to the multi-rate model, the model predictive controller can optimize the system outputs during the period between two sampling times, and then provide a more delicate control action, which can result in the reduced ripple. The simulation demonstrates its effectiveness. Copyright © 2013 IFAC.

关键词： Model predictive control

来源：评论

学校读者我要写书评

暂无评论

Shadow removal based on physical features and morphological methods

Shadow removal based on physical features and morphological ...

引用

International Conference on Communication, Electronics, and Automation Engineering, 2012

作者： Zhang, Chao Liu, Shao Jie Zhao, Yu Ming Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Shanghai 200240 China

ISBN: (纸本)9783642316975

In this paper an algorithm has been presented to remove the shadow from images, which includes two steps. First step is to detect shadow regions using physical features of shadow for an initial result with less shadow. Two properties of shadow, luminance and gray density are taken into account, to get the primary result. The second step is based on morphological methods. Using the similarity of gray density and the gradient value, a refined result can be obtained with the help of real edge of the object and the direction to expand. © 2013 Springer-Verlag.

关键词： Tracking (position)

来源：评论

学校读者我要写书评

暂无评论

control of single-phase CHB grid-connected photovoltaic system under non-uniform irradiation conditions

Control of single-phase CHB grid-connected photovoltaic syst...

引用

3rd IFAC Conference on Intelligent control and Automation Science, ICONS 2013

作者： Ma, Chao Wu, Jing Li, Ning Li, Shaoyuan Department of Automation Key Laboratory of System Control and Information Processing Shanghai Jiao Tong University Shanghai 200240 China

ISBN: (纸本)9783902823458

This paper proposes a novel MPPT method, which will provide a correct tracking direction under the condition of non-abrupt atmospheric changes, especially non-irradiation conditions. We also present a model predictive control method based on a cost function, which help to derive the predictions for each possible switching state. The control scheme obtained is capable of controlling the dc-link current to a desired MPPT reference current, while injecting sinusoidal current to the grid with reduced total harmonic distortion. Finally, the simulation results illustrate the effectiveness of our proposed method. Copyright © 2013 IFAC.

关键词： Model predictive control

来源：评论

学校读者我要写书评

暂无评论

Multi-Objective Load Distribution Optimization for Hot Strip Mills

引用

Journal of Iron and Steel Research International 2013年第2期20卷 27-32,61页

作者： JIA Shu-jin LI Wei-gang LIU Xiang-hua DU Bin Department of Automation and Key Laboratory of System Control and Information Processing Shanghai Jiao Tong University Automation Division of Research Institute Baosteel Group Corporation College of Information Science and Engineering Northeastern University Research Institute of Science and Technology Northeastern University

Load distribution is a key technology in hot strip rolling process, which directly influences strip product quality. A multi-objective load distribution model, which takes into account the rolling force margin balance, roll wear ratio and strip shape control, is presented. To avoid the selection of weight coefficients encountered in single objective optimization, a multi-objective differential evolutionary algorithm, called MaximinDE, is proposed to solve this model. The experimental results based on practical production data indicate that MaximinDE can obtain a good pareto-optimal solution set, which consists of a series of alternative solutions to load distribution. Decision-makers can select a trade-off solution from the pareto-optimal solution set based on their experience or the importance of ob- iectives. In comparison with the empirical load distribution solution, the trade-off solution can achieve a better per- formance, which demonstrates the effectiveness of the multi-objective load distribution optimization. Moreover, the conflicting relationship among different objectives can be also found, which is another advantage of multi-objective load distribution optimization.

关键词： hot strip mill load distribution multi-objective optimization

来源：评论

学校读者我要写书评

暂无评论

Integral sliding mode fault-tolerant control against actuator nonsymmetric deadzone and unmatched disturbances

Integral sliding mode fault-tolerant control against actuato...

引用

第26届中国控制与决策会议

作者： Li-Ying Hao Hui Li Xiang-Gui Guo Jinyan Song Hongshuai Pang College of Information Engineering Dalian Ocean University Information Science and Technology College Dalian Maritime University Tianjin Key Laboratory for Control Theory & Applications in Complicated System School of Electrical EngineeringTianjin University of Technology

This paper focuses on an integral sliding mode control(ISMC) algorithm for the fault-tolerant control of linear continuous multi-input systems with non-smooth nonsymmetric actuator dead-zone failure and unmatched *** dead-zone is first modeled as a combination of a line and a disturbance-like term. And the novelty of the paper lies in that the treatment of the deadzone failure based on the simplified dead-zone model. The bounded disturbancelike term which enters the state equation at the same point as the control input can be rejected completely by ISMC technology, and the linear part of the deadzone will be compensated by state feedback controller based on linear matrix inequality(LMI). It is worth pointing out that once the system is in the sliding mode, the proposed integral sliding mode control law ensures that the dead zone is compensated completely and sustains the better nature of performing unmatched perturbations attenuation than utilizing H∞ control analytical technique alone. Finally, the feasibility of our proposed algorithm is illustrated by using a numerical example.

关键词： Integral sliding mode control,dead-zone failure,unmatched disturbance,H∞ control,linear matrix inequality(LMI)

来源：评论

学校读者我要写书评

暂无评论

Integral sliding mode output control of delta operator systems with insensitivity to sampling time jitter

Integral sliding mode output control of delta operator syste...

引用

第26届中国控制与决策会议

This paper focuses on integral sliding mode output control for linear delta operator systems with insensitivity to sampling time jitter in the case of small sampling times along with unmatched disturbances. A delta-domain integral sliding mode sector can be reached without chattering by employing a novel reaching law to avoid the inherent numerical ill-condition resulting from using the traditional shift-domain model at high sampling rates. Parameter sensitivity function of the transfer function with respect to sampling time jitter is also defined to mitigate the effect of sampling time jitter which may cause significant degradation of the overall system performance. By combining the novel bounded real lemma for delta operator using integral sliding mode adaptive control approach, a method of designing output feedback controller with insensitive to sample time jitter based on linear matrix inequality(LMI) is proposed, where the corresponding reaching law proposed is able to reduce the chattering. Finally, a numerical example is presented to show the effectiveness of the proposed method.

关键词： Sensitivity,sampling time jitter,integral sliding mode control,delta operator,dynamic output feedback controller,linear matrix inequality(LMI)

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：