检索结果-内蒙古大学图书馆

2012 5th International Conference on Intelligent Computation Technology and Automation, ICICTA 2012

作者： Xie, Shaorong Xu, Yuanyu Chen, Jinbo Jin, Wenjun Luo, Jun School of Mechatronics Engineering and Automation Shanghai University Shanghai 200072 China State Key Laboratory of Robotics Shanghai University Shanghai 200072 China

ISBN: (纸本)9780769546377

DIDSON(Dual-frequency identification sonar),a new generation of acoustic video cameras, is applied to research and detect the underwater environment in this paper. In order to solve the shortcomings of the DIDSON in underwater environment, we propose a real-time forward-scan sonar image mosaicing method and system. Through a series of processing to the DIDSON images, such as image registration , image matching and image fusion, a few DIDSON images with small viewing angle and low resolution have be mosaicing to be a large-scale and high resolution sonar image. This improves DIDSON's target detection and expand observing angle to detect bigger underwater targets. © 2012 IEEE.

关键词： Image fusion

来源：评论

学校读者我要写书评

暂无评论

Theoretical study on the dynamic separation of two microplates with an intervening liquid meniscus

Theoretical study on the dynamic separation of two microplat...

引用

2011 International Conference on Mechanical engineering, Materials and Energy, ICMEME 2011

作者： Wang, Lefeng Rong, Weibin Guo, Bin Shao, Bing School of Materials Science and Engineering Harbin Institute of Technology Harbin China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin China

ISBN: (纸本)9783037853405

The dynamic separation of two parallel microplates with an intervening liquid meniscus is studied theoretically. The dynamic model considering the meniscus force and the viscous force between the plates in the separation process was developed. With typical simulation parameters, the magnitudes of various forces were compared before the separation of two parallel plates occurs. It was found that the meniscus force decreases gradually with the increase of separation distance. However there is a sudden jump of the viscous force before it gradually increases, then it decreases dramatically. The influences of various parameters on the separation time were investigated. It was found that the separation time increases with the mass of the upper plate, surface tension, viscosity and volume of the liquid. The separation time decreases with the initial distance and the contact angles of the liquid. © (2012) Trans Tech Publications, Switzerland.

关键词： Liquids

来源：评论

学校读者我要写书评

暂无评论

Theoretical analysis of meniscus forces between two spherical nanoparticles at various humidities

Theoretical analysis of meniscus forces between two spherica...

引用

2011 International Conference on Mechanical engineering, Materials and Energy, ICMEME 2011

作者： Wang, Lefeng Guo, Bin Rong, Weibin Sun, Lining School of Materials Science and Engineering Harbin Institute of Technology Harbin China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin China

ISBN: (纸本)9783037853405

The meniscus force between nanoobjects with a mediated liquid bridge plays an important role in many applications due to scale effects. As an typical configuration, the meniscus force between two spherical nanoparticles at various humidities is studied theoretically. The numerical method and the usual approximation method of calculating the meniscus force at various humidities are compared firstly. It is found that the big error may occur at some conditions. The effects of relative humidity on the meniscus force between spherical nanoparticles are investigated. Besides, the influences of spherical radius, the distance between nanoparticles, contact angles of the liquid on the meniscus forces between spherical nanoparticles are studied. The simulation results are helpful to understand and control the adhesion force at nanoscales. © (2012) Trans Tech Publications, Switzerland.

关键词： Atmospheric humidity

来源：评论

学校读者我要写书评

暂无评论

EEG feature extraction and pattern recognition during right and left hands motor imagery in brain-computer interface

EEG feature extraction and pattern recognition during right ...

引用

2012 5th International Conference on Biomedical engineering and Informatics, BMEI 2012

作者： Liu, Cheng Wang, Hailing Pu, Hui Zhang, Yi Zou, Ling School of Information Science and Engineering Changzhou University Changzhou Jiangsu 213164 China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin Heilongjiang 150001 China

ISBN: (纸本)9781467311816

At present, it is an important issue to obtain accurate classification of EEG signal in brain-computer interface. We collected the EEG data which are recorded at a sampling rate of 250Hz by EGI-64 scalp electrodes placed according to the international 10/20 system. Firstly, discrete wavelet transform method is used to decompose the average power of the channel C3/C4 and P3/P4 in left and right hands imagine movement during the some experimental period of time. The reconstructed signal of approximation coefficient A6 on the sixth level is selected to build up a feature signal. Secondly, the performances by Fisher Linear Discriminant Analysis and Support Vector Machine methods are compared. The final classifications results show that correct classification rate by Support Vector Machine is higher and gain an ideal classification results, which can establish a basis of real-time BCI application. © 2012 IEEE.

关键词： Feature extraction

来源：评论

学校读者我要写书评

暂无评论

Planar region alignment based visual regulation for mobile robot

Planar region alignment based visual regulation for mobile r...

引用

2012 9th IEEE International Conference on mechatronics and Automation, ICMA 2012

作者： Wang, Z.L. Liu, Y. Cai, B.G. Zhao, J. School of Electronic Information and Engineering Beijing Jiao Tong University Beijing 100044 China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin 150001 China

ISBN: (纸本)9781467312776

It has been proved that, based on planar region alignment, camera ego-motion motion can be robustly estimated with a multistage approach in [24]. Based on this observation, a visual regulation approach based on planar region alignment is proposed. This paper is composed of two parts. In the first part, the image motion model of planar point is reviewed first, which will be used for camera motion estimation. Then a simple least square method for computing homography matrix H is introduced. The basic procedure of multistage motion estimation based on planar region alignment is summarized. In the second part, the kinematic model of monocular camera based mobile robot system is deduced with a constrained camera-robot configuration, the visual regulation control law is derived and the stability of the close loop system is analyzed in the sense of Lyapunov stability theory. The motion estimation experiment results are presented with real images, and simulation results show the convergence of the proposed visual regulation. © 2012 IEEE.

关键词： Motion estimation

来源：评论

学校读者我要写书评

暂无评论

Pressure dependence of Brillouin frequency shift in bare silica optical fibers

引用

Chinese Optics Letters 2012年第10期10卷 20-22页

作者：顾海栋董惠娟张广玉何俊徐宁 Douglas.J.Brown School of Mechatronics Engineering Harbin Institute of Technology State Key Laboratory of Robotics and System Harbin Institute of Technology Department of Electrical and Computer Engineering University of New BrunswickFrederictonNB E3B 5A3Canada

The effect of hydrostatic pressure （up to 28 MPa） on Brillouin frequency shift （BFS） within two types of bare, single-mode fibers is studied via Brillouin optical time domain analysis technique. Experimental results show a negative linear relation between pressure and BFS, with almost the same sensitivity in both types of fibers. The average value of experimental slopes is –0.742 MHz/MPa. This value is found to be well suited to theoretical analysis on the basis of data on bulk silica glass in previous reports. This preliminary evaluation may result in a new method for distributed pressure sensing along silica optical fiber.

关键词： Frequency shift keying Hydrostatic pressure Silica Time domain analysis

来源：评论

学校读者我要写书评

暂无评论

Planar region alignment based ego-motion estimation for mobile robot

Planar region alignment based ego-motion estimation for mobi...

引用

2012 9th IEEE International Conference on mechatronics and Automation, ICMA 2012

作者： Wang, Z.L. Cai, B.G. Yi, F.Z. Liu, Y. Zhao, J. School of Electronic Information and Engineering Beijing Jiao Tong University Beijing 100044 China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin 150001 China

ISBN: (纸本)9781467312776

The ego-motion estimation is a basic task in many operations of a mobile robot. An accurate and robust result of motion estimation can greatly improve the operation. In this paper, we assume the mobile robot with visual observer is moved on flat ground and a constrained camera-robot configuration is used to simplify the camera motion model. Based on the assumption and simplified camera-robot configuration, the 3D camera motion can be separately estimated by planar region alignment between two frames. Firstly, a detected 2D motion between two frames is used to align corresponding planar regions, such an alignment or registration removes the effects of camera rotation, and the resulting residual parallax displacement field between the two region-aligned images is an epipolar field centered at the FOE (Focus-of-Expansion). Then the camera translation can be recovered from the epipolar field. The camera rotation is recovered from the computed 3D translation and the detected 2D motion. The camera motion model is derived and expressed by two parts, the multistage process for ego-motion estimation is introduced. Some experiments with real images demonstrate the robustness of the motion estimation. And the factors which may affect the results are discussed. © 2012 IEEE.

关键词： Motion estimation

来源：评论

学校读者我要写书评

暂无评论

Layout space modeling for automation design of pipeline system

Layout space modeling for automation design of pipeline syst...

引用

2012 9th IEEE International Conference on mechatronics and Automation, ICMA 2012

作者： Feng, Haibo Fu, Yili Li, Liyi School of Electrical Engineering and Automation Harbin Institute of Technology Harbin Heilongjiang Province China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin Heilongjiang Province China

ISBN: (纸本)9781467312776

Automation design is of great significance to promote design quality and reduce design cycle for pipeline system design. But high complexity and strong design interference are two main problems in automation design process of pipeline system. Thus, this study proposes a novel layout space model to reduce high complexity and design interference in automation design of pipeline system. The proposed model uses grid methods to provide candidate layout space. The candidate layout space adopts random sampling to meet requirements of reducing complexity and design interference. Test experiment is provided to show that the proposed model is effective. © 2012 IEEE.

关键词： Automation

来源：评论

学校读者我要写书评

暂无评论

SEMG control of an upper limb rehabilitation robot based on boosting of neural networks

SEMG control of an upper limb rehabilitation robot based on ...

引用

2012 9th IEEE International Conference on mechatronics and Automation, ICMA 2012

作者： Li, Qingling Song, Yu School of Mechanical Electronic and Information Engineering China University of Mining and Technology Beijing China State Key Laboratory of Robotics and System of HIT Harbin Institute of Technology Harbin China School of Electronic and Information Engineering Beijing Jiaotong University Beijing China

ISBN: (纸本)9781467312776

This paper presents a surface electromyography (sEMG) control strategy for robot-assisted upper limb rehabilitation after stroke which can make the rehabilitation robot follow the patient's intention. A new method for feature extraction is proposed aiming at non-stationary feature of sEMG firstly. And then, an ensemble classification method based on BP base classifier is brought forward to discriminate upper limb motions. Experimental results verify that the feature extraction method is superior to traditional ones with respect to recognition rate and convergence speed of classifier, and the ensemble classifier have stronger generalization ability and higher recognition accuracy than single neural network classifier. © 2012 IEEE.

关键词： Feature extraction

来源：评论

学校读者我要写书评

暂无评论

Kinematics analysis and trajectory planning of a multiarm medical robot assisted maxillofacial surgery

Kinematics analysis and trajectory planning of a multiarm me...

引用

6th International Conference on Complex Medical engineering, CME 2012

作者： Chen, Chao Duan, Xing-Guang Wang, Xing-Tao Zhu, Xiang-Yu Li, Meng Intelligent Robotics Institute Key Laboratory of Biomimetic Robots and Systems Ministry of Education State Key Laboratory of Intelligent Control and Decision of Complex System School of Mechatronical Engineering Beijing Institute of Technology #5Zhongguancun South Street Haidian Beijing China China

ISBN: (纸本)9781467316163

As the complex anatomical structure of the maxillofacial region, the surgery in this area is high risk and difficult to implement. Then, a multi-arm medical robot assisted maxillofacial surgery using optical navigation was proposed in this paper, which can improve surgical precision and make the doctors away from the heavy manual work. In this paper, the medical robot system and mechanical structure of the robot were introduced. Forward kinematics and inverse kinematics were analysed. Then trajectory planning using quintic polynomial interpolation for smoothly motion was adopted, and rectilinear motion in Cartesian space was adopted. The kinematics was validated and the workspace of the robot was calculated by simulations. Finally, the robot model was established and an experiment was carried out which proved the robot run smoothly and positioned accurately. © 2012 IEEE.

关键词： Inverse kinematics

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：