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检索条件"机构=Science and Technology on Radar Signal Processing Laboratory"

共 1812 条记录，以下是1611-1620 订阅

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Verification algorithm of a sequential circuit's equivalence based on state transfer graph

Verification algorithm of a sequential circuit's equivalence...

引用

2nd International Symposium on Information Technologies and Applications in Education, ISITAE 2008

作者： Li, Wei Yang, Desheng Lu, Ying Zhang, Yichao Institute of Computer Science and Technology Anhui University Hefei China Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University Hefei China

ISBN: (纸本)9780863419133

An equivalence verification algorithm of sequential circuits [1] based on state transfer graph (STG) is presented in this paper, which obtains some certain useful information through verifying the corresponding state transfer graphs' isomorphism, namely that two corresponding sequential circuits' equivalence . And the verifying includes two steps: firstly, find out all state pairs of the vertexes, which are being verified;secondly verify the equivalence of state pairs, if all the state pairs can be matched as equal state pairs, thus we can come to a conclusion that the corresponding circuits have the same sequential behavior. The algorithm mainly verifies ISCAS85 circuits and some simple state transfer graphs, and the final experiment data shows that the algorithm introduced in the paper will obtain better results compared to BDD(Binary Decision Diagram) and SET(Symbolic Trajectory Evaluation) methods. © 2008 IET.

关键词： Timing circuits

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Optimized calorimeter signal compaction for an independent component based ATLAS electron/jet second-level trigger 12

Optimized calorimeter signal compaction for an independent c...

引用

12th Advanced Computing and Analysis Techniques in Physics Research, ACAT 2008

作者： Simas Filho, Eduardo F. Seixas, José M. Calôba, Luiz P. Signal Processing Laboratory COPPE/Poli Federal University of Rio de Janeiro Brazil Federal Institute of Education Science and Technology Simões Filho Bahia Brazil

The ATLAS online trigger system has three filtering levels and relies very much on calorimeter information, which is segmented into seven detection layers. Due to differences both in depth and cell granularity of these layers, trigger algorithms may benefit from performing feature extraction at the layer level. This work addresses electron/jet separation at the second level (LVL2) filtering restricted to calorimeter data. Segmented Independent Component Analysis (SICA) is applied over the calorimeter layers in order to extract relevant features for particle identification. The number of independent components to be extracted from a Region of Interest (RoI) is estimated through different signal compaction strategies, such as Principal Component Analysis, Nonlinear Principal Component Analysis and Principal Components for Discrimination. These compaction techniques are evaluated with respect to dimensionality reduction (and processing speed) and classification efficiency. The hypothesis testing is performed by a Multi-Layer Perceptron classifier fed from the segmented independent components. It is shown that the proposed discriminators outperform the baseline design for ATLAS second-level trigger system, achieving a detection efficiency of 99% for a rejection factor smaller than 2%. © 2008 Sissa Medialab Srl. All rights reserved.

关键词： Compaction

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Performance analysis of a weighted max CFAR processor

Performance analysis of a weighted max CFAR processor

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2008 International radar Symposium, IRS

作者： Mansouri, H. Hamadouche, M. Youcef Ettoumi, F. Magaz, B. Image Processing and Radar Laboratory University of Science and Technology Houari Boumediene Algiers Algeria Electronic Department Ecole Nationale Polytechnique Algiers Algeria Research and Development Center Algiers Algeria

ISBN: (纸本)8372076219

关键词： Gaussian noise (electronic)

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Modeling of First-Order Scatter from Ocean Currents Based on Distributed Source

Modeling of First-Order Scatter from Ocean Currents Based on...

引用

Congress on Image and signal processing, CISP

作者： Zhijuan An Tieping Wu Hongtao Su Zheng Bao School of Science Xidian University Xi'an China Key Laboratory of Radar Signal Processing Xidian University Xi'an China

In this paper the distributed source model of first-order scatter from ocean currents is put forward, which can describe the distributed characteristics of ocean currents effectively and be used to evaluate the spatial spectrum estimation techniques under different conditions. Then the numerical simulation of the first-order scatter is carried out using this model. The performance of the MUSIC and the generalized MUSIC algorithms is investigated with the simulated data and the influence of the amplitude-phase error of the channel is evaluated simultaneously. The results show that the distributed source model presented in this paper provides an effective way to model the first-order scatter from ocean currents.

关键词： Oceans radar scattering Sea surface Surface treatment Sensor arrays Rough surfaces Surface roughness Hafnium Multiple signal classification Surface waves

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Research and development of signal acquisition unit model

Research and development of signal acquisition unit model

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2nd International Symposium on Information Technologies and Applications in Education, ISITAE 2008

作者： Tao, Baozhuang Zhang, Yichao Lu, Ying Li, Wei Department of Computer Huainan Union University China Institute of Computer Science and Technology Anhui University China Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education Anhui University China

ISBN: (纸本)9780863419133

With core device 8051 Micro-controller and expanding IO-port through Intel 8255A to gather multi-channel signal ,and the final results of data processing are sent out through serial ports. The paper, based on the characteristic of bit operation of 51-serie single-chip and by means of analysis method of mathematical statistics, develops a low-cost, simplestructure, reliable- function and highly efficientalgorithm signal acquisition unit model ,which supplies parallel or serial communication interface and Can be further developed. © 2008 IET.

关键词： Statistics

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Research on the Color Reproduction Based on the BP Neural Network Algorithm

Research on the Color Reproduction Based on the BP Neural Ne...

引用

International Conference on Advanced Computer Theory and Engineering, ICACTE

作者： Xiao-zhao Xu Xin-feng Zhang Yi-heng Cai Lan-sun Shen Chang-jiang Liu Signal & Information Processing Laboratory Beijing University of Science and Technology Beijing China

This paper proposes an algorithm of BP neural network, which reproduces a color image under D65 light conditions by using a pair of images (one with no D65 light source, and the other with D65 light source). The result of reproduction image which used a fluorescent lamp as an unknown light source is presented. This algorithm successfully removes the effect of the unknown light source color and achieves color constancy at a practical computational cost. The experiment results show that the validity of the proposed algorithm.

关键词： Neural networks Light sources Reflectivity Temperature sensors Color Image sensors Pixel Digital cameras Sensor phenomena and characterization Computer networks

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Terrasar-X: Complex image inversion for feature extraction

Terrasar-X: Complex image inversion for feature extraction

引用

2008 IEEE International Geoscience and Remote Sensing Symposium - Proceedings

作者： Soccorsi, Matteo Datcu, Mihai Gleich, Dušan German Aerospacec Center Remote Sensing Technology Institute Oberpfaffenhofen 82234 Weßling Germany Laboratory for Signal Processing and Remote Control Faculty of Electrical Engineeringand Computer Science University of Maribor Slovenia

ISBN: (纸本)9781424428083

In this paper we present two algorithms for information extraction from Single Look Complex (SLC) Synthetic Aperture radar (SAR) images. The first algorithm is based on Tikhonov regularization with Total Variation (TV) and a Point-Based Feature (PBF) term. Based on the equivalence of Tikhonov and the Bayesian estimate, the second algorithm is a Maximum A Posteriori (MAP) estimation with a complex-valued Gauss-Markov Random Field (GMRF) in addition to the TV prior. The first algorithm produces a despeckled image preserving fine details and texture. The second algorithm gives a denoised image and in addition the estimated feature parameter vector θ. © 2008 IEEE.

关键词： Synthetic aperture radar

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Wideband Circularly Polarized Square Slot Antenna with Parasitic Patch

Wideband Circularly Polarized Square Slot Antenna with Paras...

引用

International Symposium on Antennas, Propagation and EM Theory (ISAPE)

作者： C-Z. Zhou G. Fu Q. Chen National Key Laboratory of Antennas and Microwave Technology Xidian University Xi'an Shaanxi China National Key Laboratory of Radar Signal Processing Xidian University Xi'an Shaanxi China

A wideband circularly polarized square slot microstrip antenna with parasitic patch is presented. In this study, the antenna is excited by L-shaped microstrip feed line. The wide axial-radio (AR) and impedance bandwidth are achieved by adjusting the parasitic patch and relative parameters. The proposed antenna has been optimized and fabricated, and the measured results demonstrate a 3-dB AR and 10 dB return loss with bandwidth around 44.9% and 44.4% respectively.

关键词： Broadband antennas Polarization Slot antennas Microstrip antennas Bandwidth radar antennas Microwave technology Antenna feeds Laboratories Microwave antennas

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A Comprehensive Comparison of Routing Metrics for Wireless Mesh Networks

A Comprehensive Comparison of Routing Metrics for Wireless M...

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IEEE International Conference on Networking, Sensing and Control

作者： Hui Liu Wei Huang Xu Zhou X. H. Wang School of Communication and Information Engineering University of Electronic Science and Technology China National Laboratory of Radar Signal Processing Xidian University Xi'an China Institute of Advanced Telecommunications Swansea University Swansea UK

It is well-known that finding paths with minimum hop count leads to poor performance in wireless mesh networks (WMN) because the assumption of the same transmission failure probability in all links may not be true. A routing metric can assist traditional routing protocol in selecting better paths by explicitly taking the interference, delay etc. into account. This paper presents a thorough review and a comparison of 10 kinds of routing metrics designed for diverse QoS requirements in WMN. Meanwhile, this paper classifies these routing metrics into three basic types, ETX-based metrics, mETX, and some other metrics less attractive to WMN routing layer, for better understanding and future applications. To the best of our knowledge, no paper except this one has such a comprehensive review of routing metrics utilized in WMN.

关键词： Wireless mesh networks Routing protocols Interference Costs Disaster management Electronic mail Delay Intelligent networks technology management Telecommunication traffic

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Performance analysis of a weighted max CFAR processor

Performance analysis of a weighted max CFAR processor

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International radar Symposium (IRS)

作者： H. Mansouri M. Hamadouche F. Youcef Ettoumi B. Magaz Image Processing and Radar Laboratory University of Science and Technology Algiers Algeria Electronic Department Ecole Nationale Polytechnique (ENP) Algiers Algeria

ISBN: (纸本)9788372077578

In this paper, we study the performances of a novel CFAR in homogeneous environment. This processor consists to take maximum power of cells in the reference windows and multiply it by a coefficient alpha (alpha < 1) to obtain the background level estimate. We assume that the target is embedded in a white Gaussian noise and fluctuate according to a Swirling I model. Closed form expressions of the probabilities of detection and false alarm are determined and the performance of the proposed detector is investigated.

关键词： Detectors Clutter radar Noise Probability radar detection Gaussian noise

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