检索结果-内蒙古大学图书馆

作者： Mohammadzadeh, M. Shahabadi, M. Soltanian-Zadeh, H. Tavakoli, A. Rafiei, B. Javidnia, D. Oghabian, M.A. Department of Physics Amir-Kabir University of Technology Tehran Iran School of Electrical and Computer Engineering University of Tehran Tehran Iran Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran Image Analysis Laboratory Department of Radiology Henry Ford Health System Detroit MI United States Department of Electrical Engineering Amir-Kabir University of Technology Tehran Iran Medical Imaging Center Imam Khomeyni Hospital Tehran Iran Research Center for Science and Technology in Medicine Tehran University of Medical Sciences Tehran Iran

In this paper, design principles and application of a thin and flexible intravascular top hat monopole probe with increased signal-to-noise ratio (SNR) and improved longitudinal and radial coverage are described and compared with the conventional monopole probe. The top hat probe is constructed by removing a segment of the shield of a coaxial cable. A flexible thin copper foil in contact with the inner conductor of the cable is added to the end section of the cable. The copper foil acts as an antenna top hat load increasing the uniformity of the current distribution on the probe and establishes a uniform region of SNR distribution around the probe. Improvement of the SNR distribution of the top hat probe relative to the conventional monopole probe is evaluated using quantitative indices. Experimental results show that for the top hat probe, the ratio of the maximum image SNR to its relative standard deviation (SR) is 2.73 times higher than that of a conventional probe. © 2006 IOP Publishing Ltd.

关键词： Medical imaging

来源：评论

学校读者我要写书评

暂无评论

Bayesian Interpretation of Adaptive Fuzzy Neural Network Model

Bayesian Interpretation of Adaptive Fuzzy Neural Network Mod...

引用

IEEE International Conference on Fuzzy systems (FUZZ-IEEE)

作者： Sang Wan Lee Dae-Jin Kim Yong Soo Kim Zeungnam Bien Electrical Engineering and Computer Science Department Korean Advanced Institute of Science and Technology Daejeon South Korea Human-friendly Welfare Robot System Engineering Research Center Korean Advanced Institute of Science and Technology Daejeon South Korea Division of Computer Engineering Daejeon University Daejeon South Korea

This paper conveys Bayesian interpretation of improved integrated adaptive fuzzy clustering(IAFC), which is one of the adaptive fuzzy neural network models and suggests upper bound of vigilance parameter, which gives us a guideline to endow IAFC with flexibility within the framework of minimum risk classifier. Besides, we proposed the off-line and on-line learning strategy of IAFC. The proposed techniques are applied to construct facial expression recognition system dealing with neutral, happy, sad, and angry. We empirically show that proposed methods are able to outperform the conventional IAFC.

关键词： Bayesian methods Adaptive systems Fuzzy neural networks Clustering algorithms Intelligent robots Decision theory Guidelines Face recognition Partitioning algorithms Service robots

来源：评论

学校读者我要写书评

暂无评论

A Unified Ontology-Based Process Model for Software Maintenance and Comprehension 06

A Unified Ontology-Based Process Model for Software Maintena...

引用

Workshop and Symposia at MoDELS 2006

作者： Juergen Rilling Yonggang Zhang Wen Jun Meng René Witte Volker Haarslev Philippe Charland Department of Computer Science and Software Engineering Concordia University Montreal Canada System of Systems Section Defence R&D Canada Valcartier Canada

ISBN: (纸本)9783540694885

In this paper, we present a formal process model to support the comprehension and maintenance of software systems. The model provides a formal ontological representation that supports the use of reasoning services across different knowledge resources. In the presented approach, we employ our Description Logic knowledge base to support the maintenance process management, as well as detailed analyses among resources, e.g., the traceability between various software artifacts. The resulting unified process model provides users with active guidance in selecting and utilizing these resources that are context-sensitive to a particular comprehension task. We illustrate both, the technical foundation based on our existing SOUND environment, as well as the general objectives and goals of our process model.

关键词： Software maintenance process modeling ontological reasoning software comprehension traceability text mining

来源：评论

学校读者我要写书评

暂无评论

Reduction of RLC Tree Delay Using Bidirectional Buffer Repeater Insertion

Reduction of RLC Tree Delay Using Bidirectional Buffer Repea...

引用

International Conference on Innovative Computing, Information and Control (ICICIC)

作者： Trong-Yen Lee Yang-Hsin Fan Chia-Chun Tsai Department of Electronic Engineering and Institute of Computer and Communication National Taipei University of Technology Taipei Taiwan Information System Section of Library National Taitung University Taitung Taiwan Department of Computer Science and Information Engineering Nanhua University Chiayi Taiwan

In this paper, we propose a bidirectional buffer repeater insertion to reduce the RLC tree delay in multi-source multi-sink systems which involve four significant factors in our works. First, inductance effect is taken into account due to the reason that chip sizes with the exponential reduction and high work frequency. Second, bidirectional buffer repeater could improve interconnect delay more than unidirectional buffer insertion. Third, the location of insertion buffer is also considered in our work. Fourth, more than one buffer could be inserted in critical path while buffers have already existed. Finally, we develop a graphical user interface for designers to estimate the delay with bidirectional buffer repeater insertion target multi-source multi-sink systems. Experiment results shown that the reduced delay rate is 50.73% and 64.47% in 0.18 and 0.35 micron fabrication process, respectively

关键词： Repeaters Delay estimation Delay effects Inductance Propagation delay Fabrication Very large scale integration Integrated circuit interconnections Frequency Control systems

来源：评论

学校读者我要写书评

暂无评论

Bridging the Real World with the RFID Phone - Focus on Development of Innovative Man Machine Interface and Abundant Wireless Internet Service-

Bridging the Real World with the RFID Phone - Focus on Devel...

引用

International Conference on computer and Information Technology (CIT)

作者： Young-jun Seo Deuk Kyoung Oum Peom Park Department of Material Science & Engineering Seoul National University of Technology Seoul South Korea Department of Computer Science University of Wisconsin Madison Madison WI USA Department of Industrial & Information System Engineering & Humintec Ajou University Suwon South Korea

The role of mobile phones in contemporary life is a means to access to the wireless internet service not to mention a device for general communication. Even if additional functions and services are provided for use, the complexity of the phone increases and the usability and learn-ability of the phone would decrease. This paper proposes an innovative man machine interface by implementing the RFID technology into mobile phones. Unlike current MMI, the RFID phone minimizes the key inputs to connect to the wireless internet service that users want to connect to. By using the RFID phone, the wireless internet service usage will be increased with various services provided.

关键词： Radiofrequency identification Man machine systems Web and internet services Mobile handsets Usability Wireless networks Materials science and technology Mobile communication Multiaccess communication Communication standards

来源：评论

学校读者我要写书评

暂无评论

A control-design-based solution to robotic ecology: Autonomy of achieving cooperative behavior from a high-level astronaut command

A control-design-based solution to robotic ecology: Autonomy...

引用

作者： Wang, Jing Qu, Zhihua Ihlefeld, Curtis M. Hull, Richard A. Department of Electrical and Computer Engineering University of Central Florida Orlando FL 32816 United States Kennedy Space Center FL 32899 United States Lockheed Martin Missiles and Fire Control 5600 Sand Lake Rd. MP-450 Orlando FL 32819 United States School of Electrical and Computer Science University of Central Florida IEEE AIAA University of Central Florida Department of Electrical and Computer Engineering National Aeronautics and Space Administration Kennedy Space CenterKennedy Space Center Applied Physics Lab. Advanced Concepts Business Unit Science Applications International Corporation SAIC IEEE Control System Society

In this paper, we propose a cooperative control strategy for a group of robotic vehicles to achieve the specified task issued from a high-level astronaut command. The problem is mathematically formulated as designing the cooperative control for a general class of multiple-input-multiple-output (MIMO) dynamical systems in canonical form with arbitrary but finite relative degrees such that the outputs of the overall system converge to the explicitly given steady state. The proposed cooperative control for individual vehicle only need to use the sensed and communicated outputs information from its local neighboring vehicles. No fixed leader and time-invariant communication networks are assumed among vehicles. Particularly, a set of less-restrictive conditions on the connectivity of the sensor/communication networks are established, under which it is rigorously proven by using the newly found nice properties of the convergence of sequences of row stochastic matrices that the cooperative objective of the overall system can be achieved. Simulation results for a group of vehicles achieving a target and surrounding a specified object in formation are provided to support the proposed approach in this paper.

关键词： Robotics

来源：评论

学校读者我要写书评

暂无评论

Design and evaluation of a PLL-based position controller for sensorless vector control of permanent-magnet synchronous machines

Design and evaluation of a PLL-based position controller for...

引用

IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics

作者： Burgos, Rolando P. Kshirsagar, Parag Lidozzi, Alessandro Jang, Jihoon Wang, Fred Boroyevich, Dushan Rodriguez, Pedro Sul, Seung-Ki Virginia Tech Blacksburg VA 24061 United States ROMA TRE University Department of Mechanical and Industrial Engineering Via della Vasca Navale 79 00146 Rome Italy HEV System Engineering Team Hyundai Motor Company Hwaseong-Si Gyeonggi-Do 772-1 Korea Republic of Department of Electrical Engineering Technical University of Catalonia EUETIT Colom 1 08222 - Barcelona Spain School of Electrical Engineering and Computer Science Seoul National University Seoul 151-744 Korea Republic of

ISBN: (纸本)1424401364

This paper presents a rotor position controller for sensorless vector control of permanent magnet synchronous machines (PMSM) based on a synchronous d-q frame phase-locked loop (PLL). Extending the capabilities of PLL's for grid-connected converters-using feedback linearization to ensure a constant dynamic response regardless of the operating region and rotor speed, the proposed controller takes advantage of the sinusoidal and balanced PMSM back-EMF voltages synchronizing the estimated and actual d-q frames. The resultant controller structure is readily linearized providing an accurate design tool based on frequency response specifications. A complete design procedure is provided, together with simulation and experimental results with a 3.5 kW PMSM drive, all of which verify the excellent results attained by the proposed PLL-based position controller. © 2006 IEEE.

关键词： Controllers

来源：评论

学校读者我要写书评

暂无评论

Importance of Developing Image Restoration Techniques for Security Cameras under Severe Conditions

Importance of Developing Image Restoration Techniques for Se...

引用

SICE Annual Conference

作者： Yusaku Fujii Tadashi Ito Naoya Ohta Saburou Saitoh Tsutomu Matsuura Takao Yamamoto Department of Electronic Engineering Faculty of Engineering Gunma University Japan Department of Computer Science Faculty of Engineering Gunma University Japan Department of Mathematics Faculty of Engineering Gunma University Japan Department of Mechanical System Engineering Faculty of Engineering Gunma University Japan Department of Physics Faculty of Engineering Gunma University Japan

A concept, which was proposed and has been pursued by the authors for restoring the images of a suspected person taken by a security camera, is reviewed. In the concept, the peculiar facts concerning the security camera system that all the things in the image except the suspected person itself are usually preserved and that can be used for investigations are to be used as fully as possible. The authors have launched a project in which techniques based on the concept are developed for the police. In the project, some methods of restoring an image of a person's figure taken by a camera with dirty lens have been developed. The importance of pursuing the proposed concept is discussed from the viewpoints of not only the novelty in image processing technology but also the viewpoints of the efficiency in criminal investigation and social security

关键词： Image restoration Cameras Information security computer security Lenses Image processing Lighting Pixel computer science Mathematics

来源：评论

学校读者我要写书评

暂无评论

A Context-Driven Software Comprehension Process Model

A Context-Driven Software Comprehension Process Model

引用

International IEEE Workshop on Software Evolvability

作者： Wen Jun Meng Juergen Rilling Yonggang Zhang Rene Witte Sudhir Mudur Philippe Charland Department of Computer Science and Software Engineering Concordia University Montreal Canada System of Systems Section Defence Research and Development Canada Val-Belair QUE Canada

ISBN: (纸本)9780769526980;0769526980

Comprehension is an essential part of software evolution. Only software that is well understood can evolve in a controlled manner. In this paper, we present a formal process model to support the comprehension of software systems by using ontology and description logic. This formal representation supports the use of reasoning services across different knowledge resources and therefore, enables us to provide users with guidance during the comprehension process that is context sensitive to their particular comprehension task. As part of the process model, we also adopt a new interactive story metaphor, to represent the interactions between users and the comprehension process

关键词： Context modeling Ontologies Logic Software maintenance Information resources computer science Software engineering Research and development Software systems Context-aware services

来源：评论

学校读者我要写书评

暂无评论

Fundamental performance of superconducting fault current limiter with two air core coils

引用

IEEJ Transactions on Power and Energy 2006年第2期126卷 134-140页

作者： Shimizu, Hirotaka Yokomizu, Yasunobu Matsumura, Ioshiro Department of Electrical System Engineering Polytechnic University 4-1-1 Hashimotodai Sagamihara 229-1196 Department of Electrical Engineering and Computer Science Nagoya University Furo-cho Chikusa-ku Nagoya 464-8603 Polytechnic University Nagoya University

In this paper, we theoretically compared the fundamental characteristics of fault current limiter (FCL) with high Tc superconductor (HTS) and two coaxial air core coils based on steady state analysis. Two types of FCL are possible. One of them is parallel type and the other one is transformer type. The parallel type can be divided into two types according to the combination of the winding direction of coils. That is there are two cases that the coils are wound so that the magnetic fluxes induced by coils reduce and increase each other. In this paper, we called them parallel type 1 and 2, respectively. There is no significant difference in the HTS volume required to satisfy both of the specified limiting impedance ZFCL and initial current Iini in limiting operation among those three FCL's although the HTS in each type of FCL has different length and cross-sectional area. In the cases of those FCL's, we can improve the current limiting performance by arranging the HTS in the coils and applying the magnetic flux to the HTS in the limiting operation. The magnitudes of the magnetic flux density are almost the same. From the viewpoint of the FCL impedance in normal operation, parallel type 1 has the most desirable structure. On the other hand, transformer type is the best to eliminate the magnetic flux applied to the HTS in the normal operation.

关键词： Electric coils

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：