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检索条件"主题词=Algorithm Design And Analysis"

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design and stability analysis of fuzzy model based nonlinear controller for nonlinear systems using genetic algorithm

Design and stability analysis of fuzzy model based nonlinear...

引用

IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： H.K. Lam F.H.F. Leung P.K.S. Tam Centre for Multimedia Signal Processing Department of Electronic and Information Engineering Hong Kong Polytechnic University Kowloon Hong Kong China

This paper presents the stability analysis of fuzzy model based nonlinear control systems, and the design of nonlinear gains and feedback gains of the nonlinear controller using genetic algorithm with arithmetic crossover and nonuniform mutation. A stability condition is derived based on the Lyapunov stability theory with a smaller number of Lyapunov conditions. The solution of the stability conditions are also determined using GA. An application example of stabilizing a cart-pole type inverted pendulum system is given to show the stabilizability of the nonlinear controller.

关键词： Stability analysis Nonlinear control systems Fuzzy control Fuzzy systems algorithm design and analysis Feedback Genetic algorithms Arithmetic Genetic mutations Lyapunov method

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Power Controlled Scheduling with Consecutive Transmission Constraints: Complexity analysis and algorithm design

Power Controlled Scheduling with Consecutive Transmission Co...

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IEEE Annual Joint Conference: INFOCOM, IEEE Computer and Communications Societies

作者： L. Fu S. C. Liew J. Huang Department of Information Engineering Chinese University of Hong Kong New Territories Hong Kong China

ISBN: (纸本)9781424435128

We study the joint power control and minimum-frame-length scheduling problem in wireless networks, under the physical interference model and subject to consecutive transmission constraints. We start by investigating the complexity of the problem and present the first NP-completeness proof in the literature. We propose a polynomial-time approximation algorithm, called guaranteed and greedy scheduling (GGS) algorithm, to tackle this problem. We prove a bounded approximation ratio of the proposed algorithm relative to the optimal scheduling algorithm. Moreover, the proposed algorithm significantly outperforms the state-of-the-art related algorithm. Interestingly, our algorithm together with its bounded approximation ratio is applicable even when the consecutive transmission constraint is relaxed. To the best of our knowledge, the proposed algorithm is the first known polynomial-time algorithm with a proven bounded approximation ratio for the joint power control and scheduling problem under the physical interference model. We further demonstrate the performance and advantages of our algorithm through extensive simulations.

关键词： algorithm design and analysis Scheduling algorithm Optimal scheduling Approximation algorithms Power control Power system modeling Interference constraints Protocols Wireless networks Telecommunication traffic

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A new 2-D image reconstruction algorithm based on FDTD and design sensitivity analysis

A new 2-D image reconstruction algorithm based on FDTD and d...

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Microwave, MTT-S International Symposium

作者： No-Weon Kang Young-Seek Chung Changyul Cheon Hyun-Kyo Jung School of Electrical Engineering College of Medicine Seoul National University Seoul South Korea Department of Electronics University of Seoul Seoul South Korea

ISBN: (纸本)0780372395

In this paper, we propose a numerical algorithm to reconstruct the complex permittivity profile of unknown scatterers by using the FDTD technique and design sensitivity analysis (DSA). By introducing DSA and the adjoint variable method, we can calculate the derivatives of error functions with respect to complex permittivity variables, and reduce the computational cost. The proposed method is validated by application to the reconstruction of unknown 2-D scatterers which are illuminated by TM/sup 2/ with a Gaussian pulsed plane wave.

关键词： Image reconstruction Finite difference methods Time domain analysis algorithm design and analysis Sensitivity analysis Permittivity measurement Light scattering Dielectric measurements Maxwell equations Computational efficiency

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design and analysis of resolution improvement by interframe processing algorithm

Design and analysis of resolution improvement by interframe ...

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Annual Siberian Russian Workshop on Electron Devices and Materials (EDM)

作者： V.G. Nikitin I.S. Gruzman NSTU Novosibirsk Russia

ISBN: (纸本)5778203470

Summary form only given. In television systems during frame-by-frame viewing, poor resolution can be detected, while for a moving picture (as a sequence of still images) the resolution is estimated as good. The reason for this is that the eye does the necessary processing itself. Perhaps, it happens because of the lower special sampling frequency that is needed according to Nyquist's theorem. The sampling frequency can be knowingly taken lower to reduce data storage capacity. Having several frames (still images) shifted one from another and defining these shifts one can superpose the frames and increase the resolution. An algorithm of mutual shifts estimation was derived, which does not depend on the correlation function shape and uses its parity property. It allows locating the maximum with more accuracy than a period of sampling, by processing the discrete correlation function with weight coefficients.

关键词： algorithm design and analysis Image restoration Signal restoration Image resolution Frequency Image sampling Signal sampling Signal resolution Student members TV

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An effective heart rate variability processor design based on time-frequency analysis algorithm using windowed Lomb periodogram

An effective heart rate variability processor design based o...

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IEEE Biomedical Circuits and Systems (BIOCAS)

作者： Shao-Yen Tseng Wai-Chi Fang Department of Electronics Engineering and Institute of Electronics National Chiao Tung University Hsinchu Taiwan

In this paper, a system for time-frequency analysis of heart rate variability (HRV) using a fast windowed Lomb periodogram is proposed. Time-frequency analysis of HRV is achieved through a de-normalized fast Lomb periodogram with a sliding window configuration. The Lomb time-frequency distribution (TFD) is suited for spectral analysis of unevenly spaced data and has been applied to the analysis of HRV. The system has been implemented in hardware as an HRV processor and verified on FPGA. Simulations show that the proposed Lomb TFD is able to achieve better frequency resolution than short-time Fourier transform of the same hardware size. The proposed system is suitable for portable monitoring devices and as a biomedical signal processor on an system-on-chip (SOC) design.

关键词： Heart rate variability Time frequency analysis System-on-a-chip algorithm design and analysis Hardware Spectral analysis

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Maximizing visibility in nonconvex polygons: nonsmooth analysis and gradient algorithm design

Maximizing visibility in nonconvex polygons: nonsmooth analy...

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American Control Conference (ACC)

作者： A. Ganguli J. Cortes F. Bullo Coordinated Science Laboratory University of Illinois USA School of Engineering University of California Santa Cruz USA Mechanical & Environmental Engineering University of California Santa Barbara USA

This paper presents a motion control algorithm for a planar mobile observer such as, e.g., a mobile robot equipped with an omni-directional camera. We propose a nonsmooth gradient algorithm for the problem of maximizing the area of the region visible to the observer in a simple nonconvex polygon. First, we show that the visible area is almost everywhere a locally Lipschitz function of the observer location. Second, we provide a novel version of LaSaIIe invariance principle for discontinuous vector fields and Lyapunov functions with a finite number of discontinuities. Finally, we establish the asymptotic convergence properties of the nonsmooth gradient algorithm and we illustrate numerically its performance.

关键词： algorithm design and analysis Robot kinematics Robot sensing systems Mobile robots design engineering Robot vision systems Cameras Computational geometry Art Motion control

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design & analysis of performance of K-Means algorithm for cognitive fatigue detection in vehicular drivers using Skin Conductance signal

Design & analysis of performance of K-Means algorithm for co...

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International Conference on Computing for Sustainable Global Development (INDIACom)

作者： Manish Kumar Sharma Mahesh M. Bundele Department of Computer Science & Engineering Poornima College of Engineering Jaipur Raj India

The fatigue level of the driver changes due to many factors such as monotonous job of continuous attentive driving, road traffic, un-healthy road conditions, insufficient sleep, stress level, changing work habits and adverse environmental conditions. This paper provides an alternative approach for design of fatigue classifier for vehicular drivers using Skin Conductance (SC) signal to save the loss of lives by reducing the number of occurrences of vehicular accidents specifically those caused by cognitive fatigue of the drivers. We have implemented basic K-means algorithm and proposed two modifications as classifier for detection of two state fatigue data of Skin Conductance signal recorded from vehicular drivers. The classifiers were trained and tested for wavelet and statistical features of SC signal. The features so extracted were treated as individual decision making parameters. From test results it could be found that some of the statistical features and wavelet features could fetch 100 % classification accuracy.

关键词： Feature extraction Skin Fatigue Vehicles Classification algorithms Accuracy algorithm design and analysis

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design and analysis of LMS algorithm in carrier synchronization

Design and analysis of LMS algorithm in carrier synchronizat...

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International Conference on Electrical and Control Engineering (ICECE)

作者： Bangwei Liu Xiaoming Xie College of Information BUCT Beijing China

Carrier synchronization is the core part of modulation and demodulation system, which ensure the system fast, flexible and accurate processing the signal. The paper proposes a practical algorithm, combing LMS algorithm and Costas loop, to solve the problem of carrier synchronization based on software radio. This algorithm has been simulated in MATLAB and the result of the simulation is very good. At present, the carrier recovery algorithm has been applied in the practical project.

关键词： Least squares approximation algorithm design and analysis Voltage-controlled oscillators Software algorithms Synchronization Signal processing algorithms Low pass filters

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analysis and design of Spiral Inductor Based on the Particle Swarm Optimization algorithm

Analysis and Design of Spiral Inductor Based on the Particle...

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2010 International Conference on Microwave and Millimeter Wave Technology(2010国际微波与毫米波技术会议 ICMMT2010)

作者： Yantao Guo Qunsheng Cao College of Information Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

This paper introduces an efficient optimization technique, based on the physical model of a spiral inductor as well as the particle swarm optimization (PSO) algorithm, to radio frequency (RF) spiral inductors. Under fixed technology parameters and the working frequency, the PSO is used to determine the maximum quality factor (Q) of the spiral inductor. It is found that our results are not only in agreement with those of the Q-value lines, with the relative error within 1.25％, but also in agreement with those of the 3D electromagnetic simulation software, with the relative error within 2.80％. The simulation experiments have shown that the new technique can yield sufficient accuracy and efficient computation.

关键词： algorithm design and analysis Spirals Inductors Particle swarm optimization Radio frequency Parameter extraction design optimization Q factor Silicon Capacitance

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design and analysis of various slice reduction algorithm for low power and area efficient FIR filter

Design and analysis of various slice reduction algorithm for...

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International Conference on Current Trends in Engineering and Technology (ICCTET)

作者： A. Umasankar N. Vasudevan Research scholar St. peters university India Dean (Engineering and Technology) SRM University India

DA architecture synthesizes multiplier blocks with low hardware requirement suitable for implementation as part of full parallel finite impulse response (FIR) filters is presented in this paper. Then new add and shift method is introduced for low power, this method is used for SDR. SDR is fast becoming a crucial element of wireless technology the use of SDR technology is predicted to replace many of the traditional methods of implementing transmitters and receivers while offering a wide range of advantages including adaptability, reconfigurability, and multifunctionality encompassing modes of operation, radio frequency bands, air interfaces, and waveforms. Software-defined radio (SDR) refers to wireless communication in which the transmitter modulation and the receiver demodulation are both generated through software. The main advantage of this approach is flexibility, as the software runs on one common hardware platform for any type of receiver configuration. The most computationally intensive part of the wideband receiver of a software defined radio (SDR) is the intermediate frequency (IF) processing block. The proposed reconfigurable synthesizes multiplier blocks offer significant savings in area over the traditional multiplier blocks for high-speed digital signal processor (DSP) systems are implemented on field programmable gate array (FPGA) hardware platforms. Various slice reduction algorithm like RSG, MSG, Add and Shift and DA algorithm are designed to get the low power and area efficient fir filter.

关键词： Adders Finite impulse response filters Field programmable gate arrays Hardware algorithm design and analysis Filtering algorithms

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