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A modulator neural network architecture for inverse kinematics model learning

Neurocomputing 2001年 38-40卷 797-805页

作者： Oyama, Eimei Agah, Arvin MacDorman, Karl F. Maeda, Taro Tachi, Susumu Intelligent System Institute National Institute of Advanced Industrial Science and Technology 1-2 Namiki Ibaraki 305-8564 Japan Department of Electrical Engineering and Computer Science. University of Kansas United States Artificial Intelligence Laboratory and Filonet Corporation Wakayama University Canada School of Engineering University of Tokyo Japan

In order to reach an object, we need to solve the inverse kinematics problem, i.e., the coordinate transformation from the visual coordinates to the joint angle vector of the arm. The learning of the inverse kinematics model for calculating every joint angle that would result in a specific hand position is important. However, the inverse kinematics function of the human arm is a multi-valued and discontinuous function. It is difficult for a well-known continuous neural network to approximate such a function. In order to overcome the discontinuity of the inverse kinematics function, a novel modular neural network architecture is proposed in this paper. © 2001 Published by Elsevier science B.V.

关键词： Neural networks

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Vision expert system 3D-IMPRESS for automated construction of three dimensional image processing procedures 7

Vision expert system 3D-IMPRESS for automated construction o...

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7th International Conference on Virtual systems and Multimedia, VSMM 2001

作者： Zhou, Xiang-Rong Shimizu, A. Hasegawa, J. Toriwaki, J. Hara, T. Fujita, H. Virtual System Laboratory Gifu University Gifu-shi501-1193 Japan Graduate School of Bio-Applications and Systems Engineering Tokyo University of Agriculture and Technology Tokyo184-8588 Japan School of Computer and Cognitive Sciences Chukyo University Toyota-shi470-0393 Japan Department of Information Engineering Nagoya University Nagoya-shi464-8603 Japan Department of Information Science Gifu University Gifu-shi501-1193 Japan

ISBN: (纸本)0769514022

In this paper a three dimensional (3D) image processing expert system called 3D-IMPRESS is presented. This system can automatically construct a 3D image processing procedure by using pairs of an original input image and a desired output figure called sample figure given by a user This paper describes the outline of 3D-IMPRESS and presents a method of procedure consolidation for generating a procedure commonly applicable to some other 3D gray images. Finally, we show segmentation results of 3D chest CT images by using the procedures generated by 3D-IMPRESS and discuss the performance of the system. © 2001 IEEE.

关键词： Expert systems

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Vision expert system 3D-IMPRESS for automated construction of three dimensional image processing procedures

Vision expert system 3D-IMPRESS for automated construction o...

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International Conference on Virtual systems and MultiMedia

作者： Xiang-Rong Zhou A. Shimizu J. Hasegawa J. Toriwaki T. Hara H. Fujita Virtual System Laboratory Gifu University Gifu Japan Graduate School of Bio-Applications and Systems Engineering Tokyo University of Agriculture and Technology Tokyo Japan School of Computer and Cognitive Sciences Chukyo University Toyota Japan Department of Information Engineering University of Nagoya Nagoya Japan Department of Information Science Gifu University Gifu Japan

ISBN: (纸本)0769514022

关键词： Machine vision Expert systems Image processing Computed tomography Agricultural engineering Image segmentation Laboratories systems engineering and theory Agriculture Biomedical engineering

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Micromachined photoconductive electric field mapping probe for the measurement of picosecond pulse propagation

Micromachined photoconductive electric field mapping probe f...

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IEEE Photonics Conference (IPC)

作者： Jongjoo Lee Heeseok Lee Joungho Kim Terahertz Media & System Laboratory Department of Electrical Engineering & Computer Science KAIST Daejeon South Korea

The mapping of the electromagnetic fields above a microwave circuit can be of great importance in detecting desirable and undesirable interactions of the circuit with its surroundings and failure diagnosis of microelectronic integrated circuits. As a time-domain pulse measurement technique, photoconductive sampling can measure picosecond electric fields when the switch is positioned in free-space as well as picosecond potential pulses. In this paper, we develop a photoconductive electric-field probe with less than a picosecond temporal resolution and /spl mu/m spatial resolution for picosecond pulse propagation properties measurement. The probe was fabricated using a semiconductor micromachining process based on low-temperature-grown GaAs (LT-GaAs) lift-off thin film technique (ELO).

关键词： Photoconductivity Probes Pulse measurements Electric variables measurement Switches Spatial resolution Electromagnetic fields Microelectronics Microwave integrated circuits Time domain analysis

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C4ISR architectures: I. Developing a process for C4ISR architecture design

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systems engineering 2000年第4期3卷 225-247页

作者： Levis, Alexander H. Wagenhals, Lee W. System Architectures Laboratory C3I Center MSN 4D2 George Mason University Fairfax VA 22030 United States Department of Electrical Computer and Systems Engineering C3I Center System Architectures Laboratory United States Institute of Electrical and Electronic Engineers (IEEE) Advancement of Science (AAAS) United States Center of Excellence Command Control Communications and Intelligence George Mason University Fairfax VA United States System Architectures Laboratory United States

The C4ISR Architecture Framework document issued by the Department of Defense specifies three views of an information architecture and defines a set of products that describe each view. These architecture views are to serve as the basis for C4ISR system development and acquisition. The Framework does not provide a process for architecture design. In this paper, information architectures are described in the context of Structured Analysis, and then the architecture views of the Framework and the related products are interpreted in that context. A methodology for architecture design is developed that is then implemented using Structured Analysis and object orientation in two companion papers. © 2000 John Wiley & Sons, Inc.

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Interactive animation of 4D medical imaging

Interactive animation of 4D medical imaging

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IEEE EMBS International Conference on Information Technology Applications in Biomedicine (ITAB)

作者： Tong-Yee Lee Chao-Hung Lin Viual System Laboratory Department of Computer Science and Information Engineering National Cheng Kung University Tainan Taiwan

To animate four-dimensional medical imaging, it is often required to interpolate missing data between consecutive 3D imaging volume or objects. A multidimensional interpolation scheme can be used for this purpose. However, it is in general very computationally intensive. The authors present an interactive approach to animate 3D geometric changes of medical imaging in 4D. We perform interpolation in 2D and treat 3D points stored on images as display primitives to fast visualize 3D change in shapes. This approach avoids interpolation in 3D and therefore it is much faster than traditional multidimensional interpolation methods.

关键词： Animation Biomedical imaging Interpolation Data visualization Rendering (computer graphics) Multidimensional systems Three dimensional displays Image reconstruction Chaos Laboratories

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Concurrency control in a multiprocessor real-time database system

Concurrency control in a multiprocessor real-time database s...

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Euromicro Conference on Real-Time systems

作者： Tei-Wei Kuo Hsin-Chia Hsih Real-Time and Embedded System Laboratory Department of Computer Science and Information Engineering National Chung Cheng University Chiayi Taiwan

ISBN: (纸本)0769507344

Although many high-performance computer systems are now multiprocessor-based, little work has been done in real-time concurrency control of transaction executions in a multiprocessor environment. A real-time concurrency control protocol designed for uniprocessor or distributed environments may not fit the needs of multiprocessor-based real-time database systems because of a lower degree of concurrency of the transaction executions and a larger number of priority inversions. This paper proposes the concept of a priority cap to bound the maximum number of priority inversions in multiprocessor-based real-time database systems to meet transaction deadlines and to explore the abundant computing resources of parallel computer systems. A series of experiments is conducted to evaluate the capability of the proposed methodology in scheduling real-time transactions in a parallel fashion.

关键词： Concurrency control Real time systems Database systems Concurrent computing Protocols Transaction databases Processor scheduling Distributed databases system performance Embedded system

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Stroke-length control of a MEMS device

Stroke-length control of a MEMS device

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： L. Wang J.M. Dawson J. Chen P. Famouri A. Hornak Electromechanical System Laboratory Microelectronic Systems Research Center Department of Computer Science and Electrical Engineering West Virginia University Morgantown WV USA

ISBN: (纸本)0780366069

Microelectromechanical systems (MEMS) have a variety of potential civil and military applications. As MEMS become widely implemented, the application of closed-loop control methods to MEMS will lead to higher degrees of certainty and reliability of microelectromechanical operation in physically demanding environments. This paper presents an overview of research and development progress in the area of MEMS control at West Virginia University. The implementation and simulation of a closed-loop stroke-length control of a lateral comb actuator is presented. The closed-loop scheme implemented is based on a common proportional, integral, derivative (PID) linear feedback control. The position signal of the lateral comb actuator device was obtained using a through-wafer free-space optical probe. The paper also includes further progress in both linear and nonlinear feedback position control schemes.

关键词： Microelectromechanical devices Micromechanical devices Actuators Optical feedback Microelectromechanical systems Research and development Three-term control Feedback control Nonlinear optical devices Nonlinear optics

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Micromachined picosecond optical near-field probe for pulse-coupling measurement of interconnection lines

Micromachined picosecond optical near-field probe for pulse-...

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IEEE Topical Meeting on Electrical Performance of Electronic Packaging (EPEPS)

作者： Jongjoo Lee Heeseok Lee Seungyong Baek Yuchul Jung Joungho Kim Department of Electrical Engineering & Computer Science KAlST Terahertz Media and System Laboratory Daejeon South Korea Korea Advanced Institute of Science and Technology Daejeon Daejeon KR

We have successfully developed a novel picosecond optical near-field probe for the high-frequency field mapping of interconnection lines. The transverse tangential electric field distribution of the microstrip coupled... 详细信息

关键词： Pulse measurements Optical interconnections Probes Optical pulses Integrated circuit interconnections High speed optical techniques Optical films Spatial resolution Optical switches Optical pulse generation

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An integrated approach to real-time system design and on-line performance visualization with steering

An integrated approach to real-time system design and on-lin...

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Real-Time systems Symposium (RTSS)

作者： A.M. Bakic M.W. Mutka Software and System Engineering Research Laboratory Motorola Inc. Schaumburg IL USA Department of Computer Science and Engineering Michigan State University East Lansing MI USA

Emerging parallel or distributed heterogeneous real-time computer systems with many disparate constraints and requirements would benefit from a unifying and comprehensive systems engineering support in the design, testing and deployment phases, which interfaces with a human at a very high level and efficiently handles the system complexity. We present an approach to integration of: a compiler and constraint logic programming-based approach to design and engineering of complex real-time systems; and an online performance analysis and visualization technology with steering. An example distributed real-time system is used to help describe the integrated approach. Details are presented about how the involved technologies are used to help system developers and users achieve better system performance through on-line repair and reconfiguration.

关键词： Real time systems Design engineering computer interfaces Concurrent computing Distributed computing systems engineering and theory system testing Humans Program processors Logic design

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