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World Congress on Intelligent Control and Automation (WCICA)

作者： Yuanming Ding I. Nilkhamhang A. Sano Liaoning Key Laboratory of Intelligent Information Processing Dalian University Liaoning China Department of System Design Engineering Faculty of Science and Technology Keio University Yokohama Japan

An adaptive predistortion linearization is proposed to compensate for the nonlinear distortions induced by high power amplifiers (HPAs) in orthogonal frequency division multiplexing (OFDM) systems. By expressing the uncertain nonlinear input-output dynamics of HPA by a new simplified Volterra series model (VSM), a predistorter (i.e., compensator) is constructed based on identification of inverse system of the HPA. Once predistorter's parameters are obtained by RLS algorithm, when OFDM signals pass through the cascade system of the predistorter and the HPA, overall linearization from predistorter input to HPA output can be achieved even if HPA is uncertain. The effectiveness of the proposed predistortion method is validated by numerical simulation for 64-ary quadrature amplitude modulation OFDM (64QAM-OFDM) transmission systems

关键词： OFDM Predistortion Adaptive systems Nonlinear distortion High power amplifiers Nonlinear dynamical systems Power system modeling Resonance light scattering Numerical simulation Quadrature amplitude modulation

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On dynamic generation of business protocol in autonomous Web services

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systems and Computers in Japan 2006年第2期37卷 37-45页

作者： Oya, Makoto Kinoshita, Masahiro Kakazu, Yukinori Graduate School of Information Science and Technology Hokkaido University Sapporo 060-0814 Japan Department of Information Design Faculty of Engineering Hokkaido Institute of Technology Sapporo 006-8585 Japan Department of Information Science Shonan Institute of Technology Fujisawa 251-8511 Japan Open System Engineering Laboratory Division of Synergetic Information Science Graduate School of Information Science and Technology Information Processing Society of Japan IEICE Japan Society of Precision Engineering ACM Department of Information Design Hokkaido Institute of Technology Japan Society of Mechanical Engineers Complex System Engineering Laboratory Division of Synergetic Information Science Graduate School of Information Science and Technology Robotics Society of Japan

One of the issues of autonomous Web services is that precise business protocols across systems are not always predefined. A likely solution to this problem is to dynamically generate business protocols by matching external interface definitions and relating information exposed by each system. The current Web services have a feature called a portType that describes an external interface of a system. This paper proposes to add a new concept called "behavior pattern" to the portType, then provides an algorithm to dynamically generate business protocols. The algorithm compares the portTypes of the concerned system and the opposite system, verifies the possibility of their interaction, and automatically reduces the behavior patterns within executable range. The paper also evaluates this algorithm by applying it to some use cases and shows that the method provides useful early results for realization of autonomous Web services. © 2006 Wiley Periodicals, Inc.

关键词： World Wide Web

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A Hybrid MQAM-LFSK OFDM Transceiver with Low PAPR

A Hybrid MQAM-LFSK OFDM Transceiver with Low PAPR

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International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Asma Latif Nasir D. Gohar Faculty of Electronic Engineering GIK Institute of Engineering Science and Technology Pakistan Department of Information & System Engineering NUST Institute of Information and Technology Rawalpindi Pakistan

OFDM supports high data rate and generally requires no equalization at the receiver, making it simple and efficient. Besides its several benefits, it suffers from large peak-to-average-power ratio (PAPR) of the transmit signal, due to which its straightforward implementation becomes quite costly. There are several techniques to attack this problem. But, most of them are suited for specific applications or works with small number of subcarriers. Also, some need side information to be transmitted along with the signal to recover the signal properly. In this paper, a hybrid modulator is proposed that reduces PAPR while keeping the OFDM transceiver design simple, as it does not require any side information or a little side information to be sent and is efficient for arbitrary number of subcarriers. The results of the implementations are compared with conventional OFDM system as well as with other techniques like PTS

关键词： Transceivers Peak to average power ratio Partial transmit sequences OFDM modulation Quadrature amplitude modulation Data engineering Costs Intersymbol interference Bit rate systems engineering and theory

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Prediction of human behavior patterns based on spiking neurons for a partner robot

Prediction of human behavior patterns based on spiking neuro...

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RO-MAN 2006 - The 15th IEEE International Symposium on Robot and Human Interactive Communication

作者： Kubota, Naoyuki Nishida, Kenichiro IEEE Department of System Design Tokyo Metropolitan University 1-1 Minami-Osawa Hachioji Tokyo 192-0397 Japan SORST Japan Science and Technology Agency Department of Mechanical Engineering Tokyo Metropolitan University 1-1 Minami-Osawa Hachioji Tokyo 192-0397 Japan

ISBN: (纸本)1424405653

This paper discusses prediction of human behavior patterns for natural communication between a partner robot and a human. The prediction is very important to extract the perceptual information for the natural communication with a human in the future. Therefore we propose a prediction-based perceptual system based on spiking neurons. The proposed method is composed of four layers: the input layer, clustering layer, prediction layer, and perceptual module selection layer. In the clustering layer, an unsupervised learning method is used to perform the clustering of human behavior patterns. We use unsupervised learning because the human behavior patterns to be paid attention change by the other and the situation in communication. Furthermore, we show experimental results of the communication between a partner robot and a human based on our proposed method. © 2006 IEEE.

关键词： Forecasting

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Internet-based hybrid demand control system for Japanese power grid

Internet-based hybrid demand control system for Japanese pow...

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WFCS 2006: 2006 IEEE International Workshop on Factory Communication systems

作者： Roesener, C. Ishida, S. Ichimura, J. Nishi, H. Department of System Design Faculty of Science and Technology Keio University 3-14-1 Hiyoshi Kohokuku Yokohama 223-8522 Japan IT Service Section Product Development Department Tokyo Gas Co. Ltd. 3-13-1 Minamisenju Arakawa-ku Tokyo 116-0003 Japan

ISBN: (纸本)1424403790

Worldwide the demand on a higher level of automatic control of power systems rises to comply with system objectives of reliability, efficiency, cost minimization as well as emission requirements. With the transition of the power systems towards a more volatile on-site generation based on renewable resources, a higher degree of flexibility in energy consumption for reduced system congestion is evident. This paper presents a real-time information system for active control of the demand side in Japanese power grids. The proposed system allows local data processing of environmental and consumption data to schedule and curtail loads of shops, small and medium size enterprises. The concept comprises specialized control hardware for end-use supervision, local and internet based server architecture and control methods for global energy management. © 2006 IEEE.

关键词： Internet

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Semi-Autonomous Adaptive Cruise Control in Mixed Traffic

Semi-Autonomous Adaptive Cruise Control in Mixed Traffic

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SICE Annual Conference

作者： Shinya Kitazono Hiromitsu Ohmori Graduate School of Science and Technology Keio University Kanagawa Japan Department of System Design Engineering Keio University Kanagawa Japan

Platoon of vehicles is a last purpose of the AHS (automated highway systems) which is a part of ITS (intelligent highway systems). Platoon that forgives mixture of automated vehicles and manually driven vehicles attracts much attention recently. In this paper, a platoon control law based on adaptive neural network (ANN) to lower level and semi-autonomous adaptive cruise control (SAACC) to upper level is proposed. Moreover, variable time-gap (VTG) policy is adopted as a spacing policy to satisfy traffic flow stability. We confirmed that the closed loop system is stable, and confirmed the effectiveness in the numerical simulation

关键词： Programmable control Adaptive control Automatic control Automated highways Communication system traffic control Vehicle driving Road vehicles Intelligent systems Intelligent vehicles Adaptive systems

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The Control Method of A Virtual Contact Feeling system

The Control Method of A Virtual Contact Feeling System

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SICE Annual Conference

作者： Takashi Yoshimura Ryuichi Oguro Department of System Innovation and Informatics Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan

In this paper, we propose a new system that conveys the virtual contact feeling to people. Virtually, we make the real contact feeling that they touch the tip of their finger to the object. As the friction exits between the tip of their finger and the object, we make the friction, and will be able to consummate the virtual contact feeling. Nowadays, only the visual information of the object is conveyed to the user on the screen on Web. By this technique, not only the visual information of the object but also the real contact feeling will be able to be conveyed to the user in the near future. And, we think that even use as a training system for the medical treatment and use as the braille system which even visual disability people can use the Internet. The real contact feeling of the object needs comparatively high frequency. Then, first of all, we focus the real contact feeling that is made from low frequency. At present, we study to make the real contact feeling without friction

关键词： Control systems Friction Fingers Corrugated surfaces Springs Force control Rough surfaces Surface roughness Frequency Shafts

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Synchronized Control for Circadian Rhythm Based on the Central Clock Model of Drosophila

Synchronized Control for Circadian Rhythm Based on the Centr...

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SICE Annual Conference

作者： Yuta Katakura Hiromitsu Ohmori Graduate School of Science and Technology Keio University Kanagawa Japan Department of System Design Engineering Keio University Kanagawa Japan

Circadian rhythm governed by an oscillating set of genes called the central clock has become an important concern in biology, and it is said that to restore an altered rhythm is a goal of cancer therapy beyond the destruction of tumor cells. In this paper, we study the central clock model of drosophila, which is a nonlinear oscillator model. We propose a close-loop control based on flatness-based adaptive control, an open-loop control, to achieve circadian rhythm restoration

关键词： Synchronization Centralized control Circadian rhythm Clocks Biological system modeling Open loop systems Cells (biology) Cancer Medical treatment Tumors

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Rotating IR Sensor system for 2.5D Sensing

Rotating IR Sensor System for 2.5D Sensing

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2006 IEEE/RSJ International Conference on Intelligent Robots and systems

作者： Sooyong Lee Wan-kyun Chung Department of Mechanical and System Design Engineering Hongik University Seoul South Korea Department of Mechanical Engineering Pohang University of Science and Technology Pohang South Korea

This paper describes a new sensor system for improving the accuracy of the range information using multiple IR range sensors. Environment and obstacle sensing is the key issue for mobile robot localization and navigation. Laser scanners cover 180deg and are accurate but too expensive. Radial range sensors such as laser scanners, IR scanners and ultrasonic range sensor rings have blind spots so that a small obstacle not close enough to the sensor may be easily missed. It is necessary to develop a low cost sensor system which covers 360deg with small blind spots. A sensor system with 12 IR range sensors is designed and implemented. The problem of the 2D sensor systems is, they measure the nearby obstacles on a plane where the sensors are located. In order to scan the environment vertically, a 2.5D sensor system is designed and the experimental result shows the effectiveness of the proposed sensor system

关键词： Sensor systems Infrared sensors Mobile robots Sensor arrays Mechanical sensors Sensor phenomena and characterization Ring lasers Costs Sonar navigation Ultrasonic variables measurement

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Obstacle Detection and Feature Extraction using 2.5D Range Sensor system

Obstacle Detection and Feature Extraction using 2.5D Range S...

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SICE Annual Conference

作者： Hyunwoong Park Sooyong Lee Wan-kyun Chung Department of Mechanical and System Design Engineering Hongik University Seoul South Korea Department of Mechanical Engineering Pohang University of Science and Technology Pohang South Korea

This paper describes a new sensor system for improving the accuracy of the range information using multiple IR range sensors. In most of the mobile robot application, the robot enters an unknown environment and relying solely on range sensor information, it builds up an environment map that can be used for collision free navigation and localization. Mobile robot builds the environment map for localization and navigation from the range sensor information. Therefore, the accuracy of the map depends on the accuracy of the range sensor information, so do the localization and navigation. A sensor system with multiple rotating range sensors is proposed in this paper. There are 12 IR range sensors around the mobile robot. Each sensor rotates and the scanning area of a sensor overlaps with those of the nearby sensors. The advantage of the proposed idea is that the blind spot becomes much smaller than using only one sensor. In order to scan the environment vertically, a 2.5D sensor system is developed. It is more effective than the 3D vision system in some sense that it provides the stereoscopic range information without any computational image processing. The scanned data can be used for the enhanced map building and map matching

关键词： Feature extraction Sensor systems Mobile robots Navigation Infrared sensors Sensor phenomena and characterization Robot sensing systems Machine vision Computer vision Image processing

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