检索结果-内蒙古大学图书馆

2011 2nd IEEE International Conference on Signal and Image Processing Applications, ICSIPA 2011

作者： Sprager, Sebastijan Zazula, Damjan University of Maribor Faculty of Electrical Engineering and Computer Science System Software Laboratory Smetanova ulica 17 SI-2000 Maribor Slovenia

ISBN: (纸本)9781457702419

This paper presents an investigation on how different walking surfaces affect gait identification based on accelerometer data. Accelerometer data of 5 subjects walking on 4 different solid surfaces was acquired on 3 different days by a cell phone placed on the subject's hip. Data analysis detects gait cycles by a method based on wavelet transform. For all gait cycles, features were calculated by using higher-order statistics. Similarity estimation for discerning the different subjects and surfaces was introduced by using principal component analysis (PCA). It proved that the different solid surfaces do not influence the efficiency of the identification of subjects based on their gait. © 2011 IEEE.

关键词： Accelerometers

来源：评论

学校读者我要写书评

暂无评论

Integration of cultural dimensions into software localisation testing of assistive technology for deaf children

Integration of cultural dimensions into software localisatio...

引用

2011 5th Malaysian Conference in Software engineering, MySEC 2011

作者： Ping, Tan Ping Chan, Chiu Po Sharbini, Hamizan Julaihi, Azlina Ahmadi Department of Computing and Software Engineering Faculty of Computer Science and Information Technology Universiti Malaysia Sarawak Malaysia Department of Information Systems Faculty of Computer Science and Information Technology Universiti Malaysia Sarawak Malaysia Department of Computer System and Comm. Technologies Faculty of Computer Science and Information Technology Universiti Malaysia Sarawak Malaysia

ISBN: (纸本)9781457715310

Lack of hearing ability hinders deaf children from mastering grammar in language studies. Unfortunately, such software targeting Malay language is limited. This paper attempts to generate new approach in handling such software. These include detection of defects when switching into local languages, date format and accommodating the local laws. The acceptance of international software for local use goes beyond just these aspects. For this purpose, software that supports the multi-languages is evaluated. The main research question of this paper: The lack of cultural dimensions in localisation testing of assistive technology decreases the effectiveness of localisation testing of the localised software. On the account of cultural dimensions, Hofstede's Cultural Dimensions will be experimented to study which cultural dimensions are most suited for such software. From our empirical results, the failure rate of the testing is higher compared to incorporating culture dimensions. © 2011 IEEE.

关键词： Audition

来源：评论

学校读者我要写书评

暂无评论

Crop planning and water management: A survey

Crop planning and water management: A survey

引用

41st International Conference on computers and Industrial engineering 2011

作者： Goma, Walid Harraz, Nermine ElTawil, Amr Department of Computer Science and Engineering Egypt-Japan University of Science and Technology Alexandria Egypt Department of Industrial Engineering and System Management Egypt-Japan University of Science and Technology Alexandria Egypt Faculty of Engineering Alexandria University Egypt

ISBN: (纸本)9781627486835

Agricultural systems pose many challenges and problems that can be formulated as optimization problems. Among these major challenges are crop selection and irrigation planning. That is, to decide on the proper set of crops to be cultivated and a proper irrigation scheme. Such decisions are made to achieve a certain objectives that typically include the maximization of net profit and/or the minimization of water waste. The problem is complicated by the existence of conflicting multiple objectives. In addition, water management represents one of the most critical problems that face the national interests in the current and near future, especially in the middle east, where, according to UNESCO, the main interstate conflicts over water occur/will occur in that region. Given that agricultural irrigation water accounts for 80% consumption of the world's water resources, better agricultural systems management can play a critical role in the peaceful resolution of such crisis. This article presents an initial investigation of the recent work published in this field involving the mathematical formulation and the computational methods used to solve the resulting models.

关键词： Water management

来源：评论

学校读者我要写书评

暂无评论

A comparative study of the temperature dependence of lasing wavelength of conventional edge emitting stripe laser and vertical cavity surface emitting laser

A comparative study of the temperature dependence of lasing ...

引用

作者： Khan, Niazul Islam Choudhury, Samiul Hayder Roni, Arif Ahmed Faculty of Engineering and Computer Science Ulm University Ulm Germany Department of Electronic System Aalborg University Aalborg Denmark

ISBN: (纸本)9789898425690

Semiconductor lasers are the integral parts of optical communication systems. The temperature dependence of the lasing wavelength of a laser is an important issue because it is used in different environment with varying thermal conditions. In this paper, a comparative study of the temperature dependence of lasing wavelength of two types of laser diode has been presented. The comparison was made between an InGaAsP/InP stripe geometry edge-emitting laser and vertical cavity surface emitting laser (VCSEL) with GaAs in the active region. For both cases, the temperature dependence was observed for different heat sink temperatures ranging from 20°C to 50°C at an interval of 5°C for an operating current of 0.763A and 1.88mA respectively. The lasing wavelength shifts for stripe laser and VCSEL have been found to be 0.3nm/K and 0.06nm/K respectively. VCSEL exhibits significantly greater thermal stability than stripe laser. The result has also been elucidated with a comprehensive theoretical excerpt.

关键词： Surface emitting lasers

来源：评论

学校读者我要写书评

暂无评论

Swing-up and stabilizing control for two-link underactuated robot with flexible elbow joint

Swing-up and stabilizing control for two-link underactuated ...

引用

作者： Xin, Xin Faculty of Computer Science and System Engineering Okayama Prefectural University 111 Kuboki Soja Okayama 719-1197 Japan

ISBN: (纸本)9789881725592

This paper concerns the swing-up and stabilizing control problem for a two-link underactuated robot moving in the vertical plane with a single actuator at the base joint and a spring between the two links (flexible elbow joint). First, we present two new properties of such a flexible robot in the presence of gravity about the linear controllability at the UEP (upright equilibrium point, where two links are in the upright position) and the limitation of the PD control on the angle of the base joint. Second, for the robot which can not be locally stabilized about the UEP by the PD control, we study how to extend the energy-based control approach, which aims to control the total mechanical energy and the angle and angular velocity of the base joint of the robot, to design a swing-up controller. We provide a necessary and sufficient condition for avoiding the singular points in the controller. Third, we analyze the motion of the robot under the presented controller by studying the convergence of the total mechanical energy and clarifying the structure and stability of the closed-loop equilibrium points. When the robot is swung-up close to the UEP, a locally stabilizing controller is switched to balance the robot about the UEP. We validate the presented theoretical results via numerical investigation. This paper not only unifies some previous results for the Pendubot (a two-link underactuated robot with a passive elbow joint), but also suggests that the underactuated robots with flexible joints have richer nonlinear behaviors than those with only passive joints. © 2011 Chinese Assoc of Automati.

关键词： Controllers

来源：评论

学校读者我要写书评

暂无评论

Data transmission via erasure type channels protected by linear codes

引用

Journal of Physics: Conference Series 2012年第1期364卷

作者： H D Wacker P Pendli J Börcsök To whom any correspondence should be addressed University Kassel Faculty of Electrical Engineering/Computer Science Department of Computer Architecture and System Programming Wilhelmshöher Allee 71 34121 Kassel

The paper is concerned with data transmission via channels composed of a memoryless binary symmetric channel and the erasure channel of Peter Elias. Channels of this type play an important role in modelling different types of networks especially wireless networks, and have been investigated using, amongst others, the theory of Markov chains. Channel Capacities and network flows have been determined. The authors focus their interest on some aspects of coding theory. They assume the data transmission to be protected by a linear code, a CRC for example, and determine the probability of undetected error of the code. They then consider redundant transmission via two or more channels with bit inversion, and calculate the probability of undetected error. They prove some inequalities that are useful instruments to estimate the rate of transmission errors and to determine safety integrity levels according to the standards. Finally the authors apply their results to Bluetooth channels suffering from different types of noise.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A comparative study for Arabic text classification algorithms based on stop words elimination 11

A comparative study for Arabic text classification algorithm...

引用

Proceedings of the 2011 International Conference on Intelligent Semantic Web-Services and Applications

作者： Al-Shargabi, Bassam Al-Romimah, Waseem Olayah, Fekry Software Engineering Department Faculty of Information Technology Al-Isra University Amman Jordan Computer Information System Department Faculty of Information Technology University of Science and Technology Sana'a Yemen Management Information System Department Faculty of Administrative Science Al-Isra University Amman Jordan

ISBN: (纸本)9781450304740

This paper compares three techniques for Arabic text classification;these techniques are Support Vector Machine (SVM) with Sequential Minimal Optimization (SMO), Naïve Bayesian (NB), and J48. The main objective of this paper is to measure the accuracy for each classifier and to determine which classifier is more accurate for Arabic text classification based on stop words elimination. The accuracy for classifier is measured by Percentage split method (holdout), and K-fold cross validation methods,. The results show that the SMO classifier achieves the highest accuracy and the lowest error rate, and shows that the time needed to build the SMO model is the smallest time. © 2010 ACM.

关键词： Support vector machines

来源：评论

学校读者我要写书评

暂无评论

Development of a handshake request motion model considering gaze presentation

Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japa...

引用

Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C 2011年第776期77卷 1429-1440页

作者： Jindai, Mitsuru Watanabe, Tomio Shibata, Satoru Yamamoto, Tomonori Faculty of Computer Science and System Engineering Okayama Prefectural University Japan

A handshake is an embodied interaction to display closeness using physical contact. In the case of a handshake between a human and a robot, robots can now smoothly communicate and coexist with humans without eliciting feelings of aversion in humans. To enable such a handshake, we proposed a model that simulates a handshake approach motion by analyzing the human-human handshake motion. With this model, a robot generates a handshake motion when a handshake is requested by a human. However, embodied interaction between a human and a robot can be promoted if, instead, a robot requests a handshake from a human. Therefore, in this paper, we propose a handshake request motion model with which a robot requests humans for a handshake. In this model, a robot stretches its hand out to a human to request a handshake. Furthermore, a gaze presentation is generated based on the analysis of the handshake between humans. A handshake robot system with the proposed model is developed, and the effectiveness of the model is experimentally demonstrated. © 2011 The Japan Society of Mechanical Engineers.

关键词： Human robot interaction

来源：评论

学校读者我要写书评

暂无评论

Heart beat monitoring using optical interferometric signal and pseudo wigner-ville distribution

Heart beat monitoring using optical interferometric signal a...

引用

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

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：