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5-8 Oct. 2003

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Displaying Results 1 - 25 of 4302785
  • A new absolute stability and stabilization conditions for a class of Lurie uncertain time-delay systems

    Publication Year: 2003, Page(s):1916 - 1921 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (369 KB) | HTML iconHTML

    In this paper, the new absolute stability and stabilization conditions for a class of Lurie uncertain time-delay systems are proposed. Based on Lyapunov functions combined with linear matrix inequality (LMI) technology, the sufficient delay dependent absolute stability and stabilization conditions are derived for a class of Lurie uncertain time-delay systems with time-delay feedback either in stat... View full abstract»

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  • Formal design and analysis of FMS controller

    Publication Year: 2003, Page(s):1910 - 1915 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (669 KB) | HTML iconHTML

    A modeling method for controller in FMS is presented. This method is based upon the timed automata. Model checker tool UPPAAL is used to model, simulate and verify the FMS model. In the previous work about FMS modeling, the behavior of FMS is more emphasized than the performance, or vice versa. Because the time is included into the modeling method in this paper, the scheduling and controlling prob... View full abstract»

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  • Neural network control of electric machines for transportation systems

    Publication Year: 2003, Page(s):1904 - 1909 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (350 KB) | HTML iconHTML

    Ac electric motor drives are widely used in applications of electric vehicle and subway transportation. The dynamic performance of ac motor control strongly depends on model parameter accuracy. As a result traditional control scheme can't achieve good performance under uncertainty parameters. In this paper a compound gradient vector based neural network algorithm is investigated and applied in ind... View full abstract»

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  • A radial basis function neural network with on-chip learning

    Publication Year: 1993, Page(s):3035 - 3038 vol.3
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    A radial basis function neural network is implemented in a 0.8 μm Flash EPROM CMOS technology. The RBF network is used to estimate probability density functions for the purpose of pattern recognition. At 40 MHz this 3.7 M transistor chip performs 20 billion 5 b integer subtract and accumulate operations/s and 160 MFLOPS. View full abstract»

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  • Semi-fragile watermarking for image content authentication

    Publication Year: 2004, Page(s):2342 - 2345 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (186 KB) | HTML iconHTML

    In this paper, we propose a quantization-based semi-fragile watermarking algorithm for content authentication. The watermark can be blindly extracted. The formulation of judge threshold is given from the point of probability theory. The tempered areas of watermarked image can be distinguished by the predefined threshold. Our scheme is robust to incidental manipulations while fragile to malicious d... View full abstract»

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  • Quasi-directly heated cathode for magnetron

    Publication Year: 2004, Page(s):177 - 178
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (453 KB) | HTML iconHTML

    Quasi-directly heated cathode is the new version of the cathode design with vacuum gap for microwave heating magnetrons (Djubua, 1997). A characteristic feature of this design is that the spiral, on which the emission body is fixed as a bushing, performs three functions: firstly - the cathode holder, second - the heater, third - the source of primary electron which provide the magnetron fast start... View full abstract»

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  • Concatenated code-based bit rate adaptation for blocking probability reduction in WDM networks

    Publication Year: 2005, Page(s):575 - 579 Vol. 1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (259 KB) | HTML iconHTML

    We propose to use bit rate, another network resource, adaptively for reducing the blocking probability in WDM networks with non-negligible transmission degradation. Different bit rates are assigned to different connection requests according to the transmission performance. One way to achieve the adaptive bit rate is by using a concatenated code with RS(255,239) code as the inner code and Golay(23,... View full abstract»

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  • Hybrid AI system for geometric pattern recognition

    Publication Year: 2004, Page(s):128 - 131
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1513 KB) | HTML iconHTML

    The research area of hybrid and neural processing has been actively developing. Hybrid neural systems are computational systems which are based mainly on artificial neural networks but also allow a symbolic interpretation or interaction with symbolic classical artificial intelligence. In this paper we describe a hybrid AI system developed for 2D object recognition. The 2D object recognition system... View full abstract»

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  • Stabilization of a class switched linear systems

    Publication Year: 2003, Page(s):1898 - 1903 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB) | HTML iconHTML

    This paper studies periodic stabilization of a class of switched linear systems. The concepts of periodically asymptotical stabilizability (PAS) and periodically exponential stabilizability (PES) are first introduced. First, for the continuous-time case, a necessary and sufficient condition for PAS is established. Then, it is proved that PES is equivalent to PAS, and controllability is equivalent ... View full abstract»

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  • High performance TLM simulation using adjustable time steps

    Publication Year: 2004, Page(s):1029 - 1032 Vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (322 KB) | HTML iconHTML

    This work presents a novel numerical scheme for the acceleration of the 2-D Transmission-Line Matrix method. The idea is the use of controlled leaps in the time step in order to achieve faster processing. The leaps are numerically stable and may result in significant CPU savings. In addition to the adjustable time step, the procedure becomes more efficient by using model reduction with Schur decom... View full abstract»

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  • An analog neural network chip with random weight change learning algorithm

    Publication Year: 1993, Page(s):3031 - 3034 vol.3
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    Although researchers have been engaged in fabrication of neural network hardware, only a few networks implemented with a learning algorithm have been reported. A learning algorithm is required to be implemented on a VLSI chip because off-chip learning with a digital computer consumes too much time to be applied to many practical problems. The main obstacle to implement a learning algorithm is the ... View full abstract»

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  • A new approach to assess risk in water treatment using the belief function framework

    Publication Year: 2003, Page(s):1792 - 1797 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB) | HTML iconHTML

    A methodology is proposed for assessing the risk to produce non-compliant potable water, taking into account the quality of the raw water, as well as characteristics of the treatment unit and different failure modes. Belief functions are used to describe expert knowledge of treatment process efficiency, failure rates, latency times and raw water quality. Evidential reasoning provides mechanisms to... View full abstract»

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  • A scalable and oblivious digital watermarking for images

    Publication Year: 2004, Page(s):2338 - 2341 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB) | HTML iconHTML

    Scalable compression algorithms, such as JPEG, can compress images to different quality or resolution levels so that the target systems with different display capabilities, can display the image. Digital watermarking is widely used for protection of copyright and identification of ownership on digital images. It is desirable to have scalable watermarking systems, where the watermark is detectable ... View full abstract»

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  • A development framework for rapid meta-heuristics hybridization

    Publication Year: 2004, Page(s):362 - 367 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3915 KB) | HTML iconHTML

    While meta-heuristics are effective for solving large-scale combinatorial optimization problems, they result from time-consuming trial-and-error algorithm design tailored to specific problems. For this reason, a software tool for rapid prototyping of algorithms would save considerable resources. This work presents a generic software framework that reduces development time through abstract classes ... View full abstract»

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  • BNSC relationship with ESA, EU and Galileo JU

    Publication Year: 2003, Page(s):11 - 16
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (152 KB)

    First Page of the Article
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  • Research on velvet's multi-pulse emitting

    Publication Year: 2004
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (398 KB)

    Some results were made on velvet's electron emitting characteristics under multi-pulse mode. The vacuum diode voltages are 1MV for two-pulse mode and 500kV for four-pulse mode. Pulse to pulse separation is 400ns. The research indicates that under multi-pulse mode velvet's emitting is not uniform and what leads to beam's degradation is cathode plasma motion. View full abstract»

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  • PMD effect on pulse shapes and power penalty in optical communication systems

    Publication Year: 2005, Page(s):571 - 574 Vol. 1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (183 KB) | HTML iconHTML

    We present an analytical expression relating the output state of polarization and the first-order PMD vector. Also derived is a new general relation to study the effect of first-order PMD on different pulse shapes. Moreover, novel derivations for power penalty and its average value, based on the expression are presented. Measured experiment results support the theoretical analysis. View full abstract»

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  • Power supply wires self-heating analysis

    Publication Year: 2001, Page(s):115 - 118
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (472 KB) | HTML iconHTML

    Self-heating is one of the major problems of high performance ICs due to scaled feature sizes, interconnect congestion and increased current densities. As a consequence, particular attention is necessary to avoid reliability drawbacks. In this paper we report analysis results achieved evaluating self-heating of power supply busses in presence of current injection related to different working condi... View full abstract»

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  • Femtosecond three-pulse photon echo and transient grating studies of the yellow band of GaN

    Publication Year: 2002, Page(s):289 - 292
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (338 KB) | HTML iconHTML

    Using femtosecond three-pulse two-colour photon echo measurements we study the optical nonlinearity induced by pump and probe in the short time scale (< 500 fs) where the free induction decay and photon echo are the main contribution to observed signal and in a long time scale (up to 20 ps) in the trace of the population grating. The variation of the pump and probe wavelength and use of spectrally... View full abstract»

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  • Real-time image segmentation based on learning models

    Publication Year: 2004, Page(s):122 - 127
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1674 KB) | HTML iconHTML

    This paper presents real-time, digital image segmentation techniques using variable threshold functions. The approach is based on new learning models used to generate the variable threshold functions. The learning models are derived from discrete time functions often used in digital control system design. The techniques are successful to detect regions with different or poor light conditions and c... View full abstract»

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  • Pearson system-based blind source separation for estimating non-Gaussian fading channels in CDMA communication

    Publication Year: 2004, Page(s):534 - 537
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (345 KB) | HTML iconHTML

    A Pearson system-based blind source separation method is used for detecting the signal, which is subject to multiple access interference, coming to a mobile user in a CDMA downlink communication. Considering some fading channel measurements showing that the fading channel coefficients may have an impulsive nature, these coefficients are modeled with an α-stable distribution whose shape param... View full abstract»

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  • Si-Ge power amplifier for WCDMA handheld applications

    Publication Year: 2004, Page(s):363 - 366 Vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (346 KB) | HTML iconHTML

    A monolithic radiofrequency power amplifier for WCDMA handheld applications has been fabricated in a 0.35 μm, 40 GHz fT, volume production Si-Ge bipolar technology. The process technology features a doped ground connection for on-chip devices to improve the overall performance. At 3.3 V supply voltage saturated output power of 29 dBm with a PAE of 50 % has been achieved; simultaneous... View full abstract»

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  • Breaker page

    Publication Year: 2003, Page(s):397 - 398
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (11 KB)

    First Page of the Article
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  • Neural networks based an inverse dynamic model adaptive control

    Publication Year: 2003, Page(s):1892 - 1897 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (349 KB) | HTML iconHTML

    Effective control of a complex system can often be obtained using a neural network controller. However, there are some difficulties in practical use of real-time system applications of neural network controllers because of their need for a learning strategy. A neural network inverse dynamic model adaptive control scheme is proposed in this paper, based on a feedback error learning method. In parti... View full abstract»

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  • NASCENT: network layer service for vicinity ad-hoc groups

    Publication Year: 2004, Page(s):439 - 448
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (815 KB) | HTML iconHTML

    Many envisioned applications of ad hoc networks involve only small-scale networks that we term as vicinity ad-hoc groups (VAGs). Distributed coordination services, instead of pairwise communications, are the primary requirements of VAGs. Existing designs for distributed services apply either a layered structure or a vertical integration. While the former contributes to design simplicity, the latte... View full abstract»

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