检索结果-内蒙古大学图书馆

7th International Conference on Information Technology and Application, ICITA 2011

作者： Šprager, Sebastijan Donlagić, Denis Zazula, Damjan University of Maribor Faculty of Electrical Engineering and Computer Science System Software Laboratory Smetanova ulica 17 SI-2000 Maribor Slovenia University of Maribor Faculty of Electrical Engineering and Computer Science Laboratory for Electro-Optics and Sensor Systems Smetanova ulica 17 SI-2000 Maribor Slovenia

ISBN: (纸本)9780980326741

The paper presents a method for monitoring heartbeats based on time-frequency analysis of optic interferometric signal by using smoothed pseudo Wigner-Ville distribution. Optical interferometer is a sensitive device that detects physical changes of the length of optical fibre. When put in mattress, heartbeats of a subject lying on the fibre causes its perturbation. This allows entirely unobtrusive and continuous monitoring of subject's heart rate by processing interferometric signal. Reference ECG signals were acquired in order to verify recognition rate and accuracy of proposed method. An experiment with 6 subjects was performed. Interferometric and referential signals were acquired simultaneously for about 60 s. The obtained results show high recognition rate (about 97% with persons breathing and 98% with persons holding their breath).

关键词： Optical fibers

来源：评论

学校读者我要写书评

暂无评论

Set-point control for folded posture of 3-link underactuated gymnastic planar robot: Beyond the swing-up control

Set-point control for folded posture of 3-link underactuated...

引用

作者： Xin, Xin Liu, Yannian She, Jinhua Guo, Lei Faculty of Computer Science and System Engineering Okayama Prefectural University Okayama 719-1197 Japan School of Computer Science Tokyo University of Technology Hachioji Tokyo 192-0982 Japan School of Instrument Science and Opto-Electronics Engineering Beihang University Beijing 100191 China

ISBN: (纸本)9783902661937

This paper concerns a set-point control for a folded posture of a 3-link gymnastic planar robot moving in the vertical plane with the first joint being passive and the others being active. To realize the goal posture of the kip motion of a gymnast on the high bar, the control objective is to drive the robot from any arbitrary initial state to any arbitrarily small neighborhood of the up-down-down equilibrium point and then balance the robot about that point, where the first link is in the upright position and the second and third links are in the downward position. This paper uses the energy-based control approach and the notion of virtual composite link to design a controller and provides a global motion analysis of the robot. This paper shows that the control toward such a folded posture is different from the swing-up control problem, for which all three links are fully stretched out in the upright position at the goal posture. A new result of this paper is that in addition to some conditions on the control parameters, a constraint on the mechanical parameters of the robot is needed for achieving the set-point control of the folded posture. The simulation results for two 3-link robots are provided to validate the effectiveness of the proposed control law and the necessity of the constraint. © 2011 IFAC.

关键词： Motion analysis

来源：评论

学校读者我要写书评

暂无评论

TDM: A software framework for elegant and rapid development of autonomous behaviors for humanoid robots

TDM: A software framework for elegant and rapid development ...

引用

2011 11th IEEE-RAS International Conference on Humanoid Robots, HUMANOIDS 2011

作者： Berenz, Vincent Tanaka, Fumihide Suzuki, Kenji Herink, Mark Department of Intelligent Interaction Technologies Graduate School of System and Information Engineering University of Tsukuba Japan Department of Intelligent Interaction Technologies Graduate School of System and Information Engineering University of Tsukuba/JST Japan Faculty of Electrical Engineering Mathematics and Computer Science University of Twente Netherlands

ISBN: (纸本)9781612848679

Through the use of module based software solutions, programming humanoid robots became simple in the sense that detailed knowledge of the underlying software and hardware layers became largely unnecessary. In this paper we argue that the current situation, while being satisfactory for most users, requires improvement for facing situations in which delivery of a complex autonomous behavior is part of the final target. In such case, implementing a dedicated behavior control architecture remains a complex task. In this paper we propose a behavior oriented software framework to be added above the existing modular architecture. This framework is based on centralized integration of sensory data, schematic representation of objects, resource management and intrinsic motivation. It supports code organization, favors code reuse and allows rapid obtention of behaviors that can be easiliy modified or extended. A version of the framework for Aldebaran Nao was developed and tested. © 2011 IEEE.

关键词： Anthropomorphic robots

来源：评论

学校读者我要写书评

暂无评论

Trajectory tracking control of pendulum with variable length by partial energy shaping

Trajectory tracking control of pendulum with variable length...

引用

作者： Xin, Xin Shinji, Tatsuya Yamasaki, Taiga Sun, Changyin Faculty of Computer Science and System Engineering Okayama Prefectural University 111 Kuboki Soja Okayama 719-1197 Japan School of Automation Southeast University Nanjing 210096 China

ISBN: (纸本)9783902661937

This paper concerns a trajectory tracking control problem for a pendulum with variable length, which is an underactuated mechanical system of two degrees-of-freedom with a single input of adjusting the length of the pendulum. We aim to study whether it is possible to design a time-invariant control law to pump appropriate energy into the variable-length pendulum for achieving a desired swing motion (trajectory) with given desired energy and length of the pendulum. First, we show that it is difficult to avoid singular points in the controller designed by using the conventional energy-based control approach in which the total mechanical energy of the system is controlled. Second, we propose a tracking controller free of singular points by shaping only the kinetic energy of rotation and the potential energy of the pendulum and not utilizing the kinetic energy related to the motion along the rod. Third, we analyze globally the motion of the pendulum and clarify the stability issue of some closed-loop equilibrium points;and we also provide some conditions on control parameters for achieving the tracking objective. Finally, we present numerical simulation results to validate the presented theoretical results. © 2011 IFAC.

关键词： Pendulums

来源：评论

学校读者我要写书评

暂无评论

An outlook of state-of-the-art approaches in functional testing of web application

An outlook of state-of-the-art approaches in functional test...

引用

作者： Suhaila, M.Y. Wan Mohd Nasir, W.K. Department of Software Engineering Faculty of Computer Science and Information Technology University Tun Hussein Onn Malaysia 86400 Parit Raja Batu Pahat Johor Malaysia Department of Software Engineering Faculty of Computer Science and Information System University Teknologi Malaysia 81310 Skudai Johor Malaysia

ISBN: (纸本)9789881821034

The numerous recent contribution of web application testing approaches reflect the rising awareness and concern for assuring web application's functionality and performance. The functionality of a web application cannot be compromised, especially if dealing with critical web-based applications such as online banking system, ticketing system and file hosting services. This paper aims to systematically investigate state-of-the-art functional testing approaches for web applications. Focus will be given on testing techniques that address the functional aspect of a web application. In this paper we firstly perform exhaustive literature reviews on state-of-the-art approaches in functional testing of web application. Next, a comparative evaluation framework that consists of several related criteria is developed, and subsequently applied to the selected prominent approaches. Finally, we present a critical discussion on the results of the comparative evaluation. Based on our observations, the evaluation results may indicate the current and future direction in web application functional testing and the viability of these approaches. Through the results, we will be able to determine the direction of functional web application testing and which area within the functional requirement aspect of web applications that has not duly being addressed.

关键词： Software testing

来源：评论

学校读者我要写书评

暂无评论

New Results of Energy-Based Swing-up Control for a Rotational Pendulum

引用

SICE Journal of Control, Measurement, and system Integration 2011年第6期4卷 394-400页

作者： Seiji Tanaka Xin Xin Taiga Yamasaki Graduate School of Systems Engineering Okayama Prefectural University Faculty of Computer Science and System Engineering Okayama Prefectural University

In this paper, we revisit the energy-based swing-up control problem for a rotational pendulum. Different from the existing energy-based control solution, first, we present a necessary and sufficient condition such that the control law has no singularities for all states of the rotational ***, we carry out a global motion analysis of the pendulum, and we remove the previous required constraint on the initial state of the pendulum and the control parameters for preventing the pendulum getting stuck at the downward equilibrium point by revealing that the point is a saddle. Specifically, we show that the Jacobian matrix evaluated at the point has two and two eigenvalues in the open left- and right-half planes, respectively. We prove that the pendulum will eventually be swung up into the basin of attraction of any (locally) stabilizing controller for all initial conditions with the exception of a set of Lebesgue measure zero. Finally, we validate the presented theoretical results via numerical simulation. Our simulation results show that the swing-up control can be achieved quickly under the improved conditions on the control parameters.

关键词： rotational pendulum energy-based control swing-up control underactuated system Lyapunov stability theory

来源：评论

学校读者我要写书评

暂无评论

Human-robot interface with instruction of neck movement using laser pointer

Human-robot interface with instruction of neck movement usin...

引用

2011 IEEE/SICE International Symposium on system Integration, SII 2011

作者： Shibata, Satoru Yamamoto, Tomonori Jindai, Mitsuru Graduate School of Science and Engineering Ehime University 3 Bunkyo-cho Matsuyama city Ehime 790-8577 Japan Faculty of Computer Science and System Engineering Okayama Prefectural University 111 Kuboki Soja Okayama 719-1197 Japan

ISBN: (纸本)9781457715235

A human-robot system in which a mobile robot follows the movement of the laser spot projected on the floor by the laser pointer attached at the human head is considered. Human gives instruction of desired movement to the robot by rotating his or her head. Robot can realize intended movement by following the movement of the laser spot on the floor. Kansei controller is introduced between the instruction movement of the laser spot and following motion of the robot to realize psychologically acceptable motion of the robot. In addition, three modes, stopping mode, following mode, and parameter adjustment mode for the Kansei controller, are considered. The effectiveness of the proposed system was discussed experimentally, and confirmed by the smooth trajectory of the following motion of the mobile robot and good psychological evaluations. © 2011 IEEE.

关键词： Mobile robots

来源：评论

学校读者我要写书评

暂无评论

Performance measurement of thresholding algorithms in printed circuit board inspection system

Performance measurement of thresholding algorithms in printe...

引用

2nd International Conference on Computational Intelligence, Modelling and Simulation 2011, CIMSim 2011

作者： Ibrahim, Ismail Bakar, Syed Abdul Rahman Syed Abu Mokji, Musa Mohd Khalil, Kamal Yusof, Zulkifli Md. Mukred, Jameel Abdulla Ahmed Ibrahim, Zuwairie Mohamad, Mohd Saberi Ahmad, Wan Khairunizam Wan Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Johor Malaysia Faculty of Computer Science and Information System Universiti Teknologi Malaysia 81310 UTM Skudai Johor Malaysia Faculty of Mechatronic Engineering Universiti Malaysia Perlis 02600 Arau Perlis Malaysia

ISBN: (纸本)9780769545622

It is well-known that thresholding algorithm is needed by gray-scale images in segmentation operation. In this paper, real printed circuit boards used are captured using a monochrome charged coupled device camera and produced images consisting of foreground and background objects in gray-scale format. In order to correctly differentiate these two kinds of attributes, several of thresholding algorithms are applied. Then, misclassification error measure has been employed to evaluate the performances of these thresholding algorithms. This method gives information on how many percentages of background pixels wrongly assigned to foreground, and foreground pixels wrongly assigned to background pixels. As the best thresholding algorithm has been chosen, median filtering and the proposed defect classification algorithm can be applied to remove small noise in resultant images and classify the defects occurred on the printed circuit boards, respectively. © 2011 IEEE.

关键词： Printed circuit boards

来源：评论

学校读者我要写书评

暂无评论

Experimental and theoretical research of unsaturated optical stopping effect in Sn-As2S8

引用

Guangdianzi Jiguang/Journal of Optoelectronics Laser 2012年第8期23卷 1494-1499页

作者： Wang, Guan-De Chen, Bao-Xue Hamanaka, Hiromi Iso, Mamoru School of Optical-Electrical and Computer Engineering University of Shanghai for Science and Technology Shanghai 200093 China Shanghai Key Laboratory of Modern Optical System Shanghai 200093 China Engineering Research Center of Optical Instruments and Systems Ministry of Education Shanghai 200093 China Faculty of Engineering Hosei University Tokyo 184-8584 Japan Department of Chemical Engineering Tokyo University of Agriculture and Technology Tokyo 184-8588 Japan

In order to study the internal mechanism of unsaturated optical stopping effect with trace doped tin in As2S8 amorphous thin film waveguide, we use the double-prism coupled technology to investigate the thin film waveguide samples in detail. The chemical bond structures of the thin film materials are analyzed. With the help of the electron energy band gap theory and the hybridize orbital theory, the dynamical model of unsaturated optical stopping is proposed. The numerical analysis results agree with the experimental data very well, and the phenomenon of unsaturated optical stopping effect can be predicted by the deduction of this model. It reveals the nature of the experiments.

关键词： Thin films

来源：评论

学校读者我要写书评

暂无评论

Alternative model for extracting multidimensional data based-on comparative dimension reduction

Alternative model for extracting multidimensional data based...

引用

2nd International Conference on Software engineering and computer systems, ICSECS 2011

作者： Sembiring, Rahmat Widia Mohamad Zain, Jasni Embong, Abdullah Faculty of Computer System and Software Engineering Universiti Malaysia Pahang Lebuhraya Tun Razak 26300 Kuantan Pahang Darul Makmur Malaysia School of Computer Science Universiti Sains Malaysia 11800 Minden Pulau Pinang Malaysia

ISBN: (纸本)9783642221903

In line with the technological developments, the current data tends to be multidimensional and high dimensional, which is more complex than conventional data and need dimension reduction. Dimension reduction is important in cluster analysis and creates a new representation for the data that is smaller in volume and has the same analytical results as the original representation. To obtain an efficient processing time while clustering and mitigate curse of dimensionality, a clustering process needs data reduction. This paper proposes an alternative model for extracting multidimensional data clustering based on comparative dimension reduction. We implemented five dimension reduction techniques such as ISOMAP (Isometric Feature Mapping), KernelPCA, LLE (Local Linear Embedded), Maximum Variance Unfolded (MVU), and Principal Component Analysis (PCA). The results show that dimension reductions significantly shorten processing time and increased performance of cluster. DBSCAN within Kernel PCA and Super Vector within Kernel PCA have highest cluster performance compared with cluster without dimension reduction. © 2011 Springer-Verlag.

关键词： Principal component analysis

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：