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Agent Design Patterns Framework for MaSE/POAD Methodology

Agent Design Patterns Framework for MaSE/POAD Methodology

引用

ACS/IEEE International Conference on computer systems and Applications

作者： R. Mohamad S. Deris H.H. Ammar Software Engineering Department Faculty of Computer Science and Information System Universiti Teknologi Malaysia Johor Malaysia Computer Science and Electrical Engineering Department West Virginia University Morgantown WV USA

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The Control Method of A Virtual Contact Feeling system

The Control Method of A Virtual Contact Feeling System

引用

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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Image Restoration for Security Cameras with Dirty Lens under Oblique Illumination

Image Restoration for Security Cameras with Dirty Lens under...

引用

IEEE International Workshop on Imaging systems and Techniques (IST)

作者： Y. Fujii N. Ohta T. Ito S. Saitoh T. Matsuura T. Yamamoto Department of Electronic Engineering Faculty of Engineering Gunma University Gunma Japan Department of Computer Science Faculty of Engineering Gunma University Japan Department of Electronic Engineering 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

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Speech enhancement based on auto gain control

Speech enhancement based on auto gain control

引用

作者： Nagata, Yoshifumi Fujioka, Toyota Abe, Masato IEEE Department of Computer and Information Science Iwate University Morioka 020-8551 Japan Research and Development Center Toshiba Corporation Iwate University Morioka Japan Acoustical Society of Japan Information Processing Society of Japan Department of Computer and Information Science Faculty of Engineering Iwate University Acoustical Society of America Institute of Noise Control Engineering of Japan Institute of Electronics Information and Communication Engineers Association for Computing Machinery Japan Society of Mechanical Engineers

We propose a new method of speech enhancement based on auto gain control (AGC) using two channel inputs to deal with transient noises. Auto gain control is considered to be relatively ineffective for reducing noises that are superimposed on speech. Nevertheless, it offers advantages for addressing problems posed by musical noise and spectral distortion. This method combines two operations for obtaining accurate gain. One is spectral subtraction for two-channel input (2chSS);the other is self-offset of the noise with pre-whitening. This study also addresses a coherence based post-filter to reduce uncorrelated noise components among channels. The proposed method is evaluated in experiments across three noise conditions in which (i) impulsive noises, (ii) stationary car noise, and (iii) speech noise are present, respectively. Objective measures and spectrograms demonstrate marked improvements over other two-microphone based methods, but subjective preference tests reveal that the proposed method is less preferred than the equivalent of a nonprocessed signal in the case of stationary car noise (ii). The performance of the proposed method and the conventional 2chSS were even in the case of speech noise (iii). These results of subjective tests reflect some disadvantages of the AGC processing. Those drawbacks involve degradation of noise consistency in stationary noise conditions and residual noises in desired speech segments. Nevertheless, subjective tests in the case of noise (i) demonstrate that the proposed method is the most preferred among the methods compared here. The effectiveness of the proposed method is confirmed particularly for this noise condition. © 2006 IEEE.

关键词： Speech processing

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Evolutionary Programming With Only Using Exponential Mutation

Evolutionary Programming With Only Using Exponential Mutatio...

引用

Congress on Evolutionary Computation

作者： H. Narihisa K. Kohmoto T. Taniguchi M. Ohta K. Katayama Department of Information & Computer Engineering Faculty of Engineering Okayama University of Science Okayama Japan School of Biology-Oriented Science and Technology Department of Intellgence System Kinki University Kinokawa Wakayama Japan

The individual of population in standard self-adaptive evolutionary programming (EP) is composed as a pair of objective variable and strategy parameter. Therefore, EP must evolve both objective variable and strategy parameter. In standard evolutionary programming (CEP), these evolutions are implemented by mutation based on only Gaussian random number. On the other hand, fast evolutionary programming (FEP) uses Cauchy random number as evolution of objective variable and exponential evolutionary programming (EEP) uses exponential random number as evolution of objective variable. However, all of these EP (CEP, FEP and EEP) commonly uses Gaussian random number as evolution of strategy parameter. In this paper, we propose new EEP algorithm (NEP) which uses double exponential random number for both evolution of objective variable and strategy parameter. The experimental results show that this new algorithm (NEP) outperforms the existing CEP and FEP.

关键词： Genetic programming Genetic mutations Evolution (biology) Probability distribution Distributed computing Exponential distribution Evolutionary computation Artificial intelligence Genetic algorithms Functional programming

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Phased Learning with Hierarchical Reinforcement Learning in Nonholonomic Motion Control

Phased Learning with Hierarchical Reinforcement Learning in ...

引用

SICE Annual Conference

作者： Takaknuni Goto Noriyasu Homma Makoto Yoshizawa Kenichi Abe Department of Electrical and Communication Engineering University of Tohoku Sendai Japan Faculty of Medicine University of Tohoku Sendai Japan Department of Computer Science College of Engineering Nihon University Koriyama Japan

In this paper, a hierarchical reinforcement learning algorithm for controlling nonholonomic systems is proposed. When applying reinforcement learning to the nonholonomic systems, acquiring adequate policies is difficult because of an increase of learning steps and a convergence of local optimal policies. The proposed algorithm is inspired by such human learning behavior. Human can learn to control such systems sufficiently even if they initially have little knowledge about the system's dynamics and the way to control. This human capability is suggested to be caused by their exploration strategies for acquiring the adequate policies. The key element of the proposed algorithm is a shaping function defined on a novel position-direction space. The shaping function is autonomously constructed once the goal is reached and constrains the exploration area to optimize the policy. The efficiency of the proposed shaping function was demonstrated by using a nonholonomic control problem of positioning the 2-link planer underactuated manipulator

关键词： Learning Motion control Humans Control systems Convergence Delay computer science Educational institutions Medical control systems communication system control

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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

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Effects of digital filtering technique in reducing the effects of clipping of an enhanced orthogonal frequency division multiplexing system

Effects of digital filtering technique in reducing the effec...

引用

International Symposium on Wireless Pervasive Computing (ISWPC)

作者： W.H. Wan Hassan S. Khatun Center for Foundation Education and Extension Education Multimedia University Malacca Malaysia Department of Computer and Communication System Faculty of Engineering Universiti Putra Malaysia Selangor Darul Ehsan Malaysia

Despite of the many advantages of OFDM, it has two main drawbacks which are high peak to average power ratio (PAPR) and synchronization problem. High PAPR causes saturation in power amplifiers, leading to intermodulation products among the sub carriers and disturbing out of band energy. Therefore, it is desirable to reduce the PAPR by means of PAPR reduction schemes. However, it caused the degradation of BER and enhanced the growth of out of band radiation which has led to the degradation of OFDM overall performance. In this paper, OFDM system with an enhanced clipping technique has been proposed, the effects of clipping have been analyzed and the system is evaluated by integrating with its significant features including convolutional forward error control coding, oversampled inverse fast Fourier transform (IFFT) and digital filtering technique in order to minimize the effects of clipping. It is shown that the bit error rate (BER) of the clipped OFDM signal is improved, the PAPR is further reduced and the effect of out of band radiation is minimized. Besides, other effects of the filtering technique are also analyzed in order to optimize the overall performance of our proposed system.

关键词： Digital filters Filtering OFDM Peak to average power ratio Bit error rate Degradation Frequency synchronization High power amplifiers Convolutional codes Convolution

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Advanced Functions of the Scanning Laser Range Sensor for Environment Recognition in Mobile Robots

Advanced Functions of the Scanning Laser Range Sensor for En...

引用

International Conference on Multisensor Fusion and Integration for Intelligent systems (MFI)

作者： Hirohiko Kawata Satofumi Kamimura Akihisa Ohya Jun'ich Iijima Shin'ich Yuta The Department of Computer Science University of Tsukuba Tsukuba Japan Department of Intelligent Interaction Technologies Graduate School of System and Information Engineering University of Tsukuba Tsukuba Japan The Mechanical Engineering Research Laboratory Hitachi Ltd. Hitachinaka Japan Department of Computer Science Graduate School of System and Information EngineeringGraduate School of System and Information Engineering University of Tsukuba Tsukuba Japan The Faculty of Information Science Meisei University Hino Japan

We have developed scanning laser range sensor called "SOKUIKI" sensor which is ultra-small scanning laser range sensor adopted for various types of mobile robots as we have already published. As a sensor for environment recognition, we thought the sensor must have not only outputting distance data but also another helpful function for mobile robots. So it was considered that what kind of advanced functions should be provided to SOKUIKI sensor. As a result two most important purposes were acquired. 1. Variation on its distance data and method to get the data. 2. The function for prevention of optical interference between sensors. These rolls were installed to the sensor, and confirmed their effect. This paper describes its result and proposes sensor communication interface protocol (SCIP) which is developed as new command system just for SOKUIKI sensor

关键词： Mobile robots Intelligent sensors Sensor systems Sensor fusion systems engineering and theory Optical sensors Robot sensing systems Frequency Laser fusion Sensor phenomena and characterization

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Analyzing and Extending MUMCUT for Fault-based Testing of General Boolean Expressions

Analyzing and Extending MUMCUT for Fault-based Testing of Ge...

引用

International Conference on computer and Information Technology (CIT)

作者： Chang-ai Sun Yunwei Dong R. Lai K.y. Sim T.y. Chen Faculty of Information and Communication Technologies Swinburne University of Technology VIC Australia Department of Computer Science and Computer Engineering La Trobe University VIC Australia School of Engineering Swinburne University of Technology Kuching Sarawak Malaysia

Boolean expressions are widely used to model decisions or conditions of a specification or source program. The MUMCUT, which is designed to detect seven common faults where Boolean expressions under test are assumed to be in Irredundant Disjunctive Normal Form (IDNF), is an efficient fault-based test case selection strategy in terms of the fault-detection capacity and the size of selected test suite. Following up our previous work that reported the fault-detection capacity of the MUMCUT when it is applied to general form Boolean expressions, in this paper we present the characteristic of the types of single faults committed in general Boolean expressions that a MUMCUT test suite fails to detect, analyze the certainty why a MUMCUT test suite fails to detect these types of undetected faults, and provide some extensions to enhance the detection capacity of the MUMCUT for these types of undetected faults.

关键词： Fault detection Genetic mutations Software testing communications technology computer science Failure analysis Costs Programming profession Information technology Terminology

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