检索结果-内蒙古大学图书馆

IEEE International Conference on Multimedia and Expo (ICME)

作者： Mujdat Boyar Özgür Alan Samet Akpinar Orkunt Sabuncu Nihan K. Çiçekli Ferda N. Alpaslan Orta Dogu Teknik Universitesi Ankara Ankara TR Intelligent Systems Lab. Dept. of Computer Engineering METU Ankara Turkey

We propose a method to detect events and event boundaries in soccer videos by using web-casting texts and audio-visual features. The events and their inaccurate time information given in web-casting texts need to be aligned with the visual content of the video. We overcome this issue by utilizing textual, visual and audio features. Existing methods assume that the time at which the event occurs is given precisely (in seconds). However, most web-casting texts presented by popular organizations such as *** (the official site of Union of European Football Associations) provide the time information in minutes rather than seconds. We propose a robust method which is able to handle uncertainties in the time points of the events. As a result of our experiments, we claim that our method detects event boundaries satisfactorily for uncertain web-casting texts, and that the use of audio-visual features improves the performance of event boundary detection.

关键词： Videos Feature extraction Color Cameras Pixel Data mining Histograms

来源：评论

学校读者我要写书评

暂无评论

Simulation of lightning strike in 2-D and 3-D with fractal theory and its application

引用

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical engineering 2010年第22期30卷 127-134页

作者： Xu, Wei Chen, Shui-Ming He, Jin-Liang State Key Lab. of Control and Simulation of Power Systems and Generation Equipments Dept. of Electrical Engineering Tsinghua University Haidian District Beijing 100084 China

Lighting causes great damage to power systems due to the stochastic nature of lightning discharges and the vulnerability of lightning leaders to various environments in the process of inception and propagation. In this work, the growth of diffusion limited aggregation (DLA) was adopted for reproducing branches and tortuosity of lightning channels in both 2-D and 3-D simulations. By comparing the fractal dimensions of natural lightning discharges and simulation results on various discharge settings, we discovered that a fractal coefficient η = 2 can deliver a credible model of lightning strikes. We further proved the consistency between simulation results and observations conducted in Japan during 2005 and 2006 winter seasons on lightning strikes to a windmill and its lightning-protection tower. But the credibility of the result needs to be verified by further experimental data, when the model extended from 2-D to 3-D. Moreover, striking probability and the shielding effect in the actual condition were analyzed with the proposed simulation model. © 2010 Chin. Soc. for Elec. Eng.

关键词： Fractal dimension

来源：评论

学校读者我要写书评

暂无评论

A new roadmap constitution method based on dividing grid and level-set

A new roadmap constitution method based on dividing grid and...

引用

International Symposium on Intelligence Information Processing and Trusted Computing

作者： Li, Shidong Ding, Mingyue Cai, Chao Institute for Information Engineering of Hubei University for Nationalities Enshi Hubei China Institute for Pattern Recognition and Artificial Intelligence National Lab. for Multi-spectral Information Processing Technologies HUST Wuhan China College of Life Science and Technology Image Processing and Intelligent Control Key Laboratory of Education Ministry of China HUST Wuhan China

ISBN: (纸本)9780769541969

Roadmap methods were widely used in route planning fields, both for robots and unmanned aircrafts. Traditional roadmap is constituted by connecting the vertexes of convex obstacle, which is related to the locations of start and goal of route, so the roadmap can not be reused when anyone of start and goal changed. Absence of reusability reduces the efficiency of route planning by using roadmap. A new roadmap constitution method was proposed in this paper, which is build on dividing the 2D configuration space into multi-scale grids and setting nodes of roadmap on grid boundary using Level-Set method, same method was used to construct the map cells of roadmap between any two nodes lays on same grid . The roadmap constituted with new method can be reused when the start or goal was changed;it is efficient for replanning problem. © 2010 IEEE.

关键词： Reusability

来源：评论

学校读者我要写书评

暂无评论

Reduction of voltage harmonics in three-phase inverters using discrete observers

Reduction of voltage harmonics in three-phase inverters usin...

引用

International Conference on Power Electronic Drives and Energy systems for Industrial Growth

作者： L Padmavathi. P.A. Janakiraman Control Systems Lab. Electrical Engineering Indian Institute of Technology Madras Chennai 600036 India Professor of Electrical Engineering Indian Institute of Technology Madras Chennai India

This paper proposes a simple harmonic feedback strategy for reduction of output voltage harmonics and the removal of any voltage unbalance due to unbalanced linear and non-linear loads in three-phase inverters. The fundamental components of the voltage and current are controlled in dq frame. Two-phase observers have been used for estimating the fundamental αβ components of the inverter voltage and the load current, which in turn helps to segregate the harmonics from the signal. The observer based control strategy, reduction of harmonic distortion and load voltage balancing by the simple harmonic feedback approach has been verified by simulation and experiments.

关键词： Inverters Pulse width modulation Firing Switches Harmonic analysis Power harmonic filters

来源：评论

学校读者我要写书评

暂无评论

Calculation method of the battery SOC based on evolvable hardware

Calculation method of the battery SOC based on evolvable har...

引用

2010 IEEE International Conference on Software engineering and Service Sciences, ICSESS 2010

作者： Piao, Changhao Ding, Xing Wang, Jin Tang, Binbin Ministry of Education Key Lab. of Network Control Tech. and Intelligent Instruments Chongqing University of Posts and Telecommunications Chongqing 400065 China Chongqing ChangAn New Energy Automobile Co. Ltd. Chongqing 401120 China Research Center of Energy Electronics College of Automation Engineering Chongqing University of Posts and Telecommunications Chongqing 400065 China

ISBN: (纸本)9781424460526

Battery state-of-charge (SOC) is estimated for electric or hybrid electric vehicles by using Evolvable Hardware (EHW). SOC is a key factor in the management of battery and its estimation is an important and challenging task. We combine EHW and evolutionary algorithm to design a system, which is 16-row and 4-layer with three inputs (voltage, magnification, charge-discharge mode) and one output (estimated SOC). The evolutionary algorithm is used to train the chromosome structure after setting by EHW. The results show that it can obtain battery SOC around the experimental curve after importing a parameter randomly. © 2010 IEEE.

关键词： Hybrid vehicles

来源：评论

学校读者我要写书评

暂无评论

SOC estimation of lead-acid batteries based on UKF

SOC estimation of lead-acid batteries based on UKF

引用

International Conference on Electrical and control engineering, ICECE 2010

作者： Piao, Changhao Sun, Zhihua Liang, Zhanghou Cho, Chongdu Ministry of Education Key Lab. of Network Control Tech. and Intelligent Instruments Chongqing University of Posts and Communications Chongqing China Chongqing Changan New Energy Automobile Co. Ltd. Chongqing China Research Center of Energy Electronics Chongqing University of Posts and Communications China Department of Mechanical Engineering INHA University of Korea Korea Republic of

ISBN: (纸本)9780769540313

A novel self-adaptive state of charge (SOC) estimation model of lead-acid batteries based on Unscented Kalman Filter (UKF) algorithm is presented in here. The model state and measurement equations are constituted by the Ah counting method and load voltage method. In order to ensure the estimation accuracy, we establish a new function model for the Variable Rated Capacity of lead-acid batteries, and so the Ah counting method has been improved. On this basis, the SOC Algorithm is compared in three experimental conditions (including constant-current, constant-voltage and pulse-charge/discharge). The results show that this algorithm can effectively estimate SOC. © 2010 IEEE.

关键词： Lead acid batteries

来源：评论

学校读者我要写书评

暂无评论

Learning compliance control of robot manipulators in contact with the unknown environment

Learning compliance control of robot manipulators in contact...

引用

2010 IEEE International Conference on Automation Science and engineering, CASE 2010

作者： Li, Yanan Yang, Chenguang Ge, Shuzhi Sam Social Robotics Lab. NUS Graduate School for Integrative Sciences and Engineering National University of Singapore Singapore 119613 Singapore Department of Bioengineering Imperial College London London SW7 2AZ United Kingdom Department of Electrical and Computer Engineering Interactive Digital Media Institute National University of Singapore Singapore 117576 Singapore Institute of Intelligent Systems University of Electronic Science and Technology of China Chengdu 610054 China

ISBN: (纸本)9781424454471

In this paper, a control mechanism is presented to improve the compliance performance of the robot manipulator when it is in contact with the unknown environment. This mechanism guarantees that the dynamics of the whole system follows a target impedance model so that the desired compliance performance is obtained. In particular, under the assumption that the dynamics is periodic, a learning law is developed to estimate the unknown dynamics parameters. Besides, the proposed systematic learning control does not require the accurate force measurement. Its performance and robustness are discussed in details by the rigorous analysis. At last, the validity of the proposed method is verified by simulation. © 2010 IEEE.

关键词： Modular robots

来源：评论

学校读者我要写书评

暂无评论

A class of data-driven based controller design and its parameters tuning method

A class of data-driven based controller design and its param...

引用

Chinese control Conference (CCC)

作者： Weihong Wang Zhongsheng Hou Haibo Huo Shangtai Jin School of Mechanical Engineering and Automation Beihang University Beijing 100191 China Advanced Control Systems Lab. School of Electronics and Information Engineering Beijing Jiaotong University 100044 China Department of Electrical Engineering Shanghai Ocean University 201306 China

Data-based control technique becomes a research hot point because of the controller design need the system I/O data only. A class of data-based controller design and its parameters tuning method (IFT-MFAC) was proposed for a class of discrete-time nonlinear system in this paper. Three controller structures are deduced according to non-parameters time-varying dynamic linearization theorem, then the controller parameters are tuning by IFT technique. The rationality of the 3 structures of the controller is assured by the theorem, whereas, the controller structure is designed blindly by IFT. Obviously, the new method settles down this problem more properly. Finally, the three data-based methods IFT-MFAC, MFAC and IFT were compared through 3 examples. And the simulation results show the validity of the IFT-MFAC.

关键词： Tuning Electronic mail Adaptive control Educational institutions Adaptation model Nonlinear dynamical systems Electrical engineering

来源：评论

学校读者我要写书评

暂无评论

A class of data-driven based controller design and its parameters tuning method

A class of data-driven based controller design and its param...

引用

作者： Wang, Weihong Hou, Zhongsheng Huo, Haibo Jin, Shangtai School of Mechanical Engineering and Automation Beihang University Beijing 100191 China Advanced Control Systems Lab. School of Electronics and Information Engineering Beijing Jiaotong University Beijing 100044 China Department of Electrical Engineering Shanghai Ocean University Shanghai 201306 China

ISBN: (纸本)9787894631046

Data-based control technique becomes a research hot point because of the controller design need the system I/O data only. A class of data-based controller design and its parameters tuning method (IFT-MFAC) was proposed for a class of discrete-time nonlinear system in this paper. Three controller structures are deduced according to non-parameters time-varying dynamic linearization theorem, then the controller parameters are tuning by IFT technique. The rationality of the 3 structures of the controller is assured by the theorem, whereas, the controller structure is designed blindly by IFT. Obviously, the new method settles down this problem more properly. Finally, the three data-based methods IFT-MFAC, MFAC and IFT were compared through 3examples. And the simulation results show the validity of the IFT-MFAC.

关键词： controllers

来源：评论

学校读者我要写书评

暂无评论

Embeded smart sensor: System calibration and modeling

Embeded smart sensor: System calibration and modeling

引用

作者： Yang, Kehu Yu, Wensheng School of Mechanical Electronic and Information Engineering China University of Mining and Technology Beijing 100083 China School of Software Engineering East China Normal University Shanghai 200062 China Lab. of Complex Systems and Intelligent Science Institute of Automation CAS Beijing 100190 China

ISBN: (纸本)9787894631046

This paper studied the calibration method for a type of embedded smart sensors which are integrated with inertial, magnetic and vision sensors. A set of calibration and modeling methods which are suitable for the low cost applications have been proposed. For the deterministic items and nondeterministic items, we used the method of modulus matching of the input vectors and the method of time series analysis to calibrate and modeling them respectively;for the relative rotation between the accelerometers' frame and the camera frame, we proposed a calibrating method which is based on the gravity vector and plumb line. The experimental and simulation results demonstrated the practicability and effectiveness of these methods.

关键词： Calibration

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：