检索结果-内蒙古大学图书馆

Design of Linear Phase Nonuniform Filter Banks with Interpolated Prototype Filters

Procedia Engineering 2012年 29卷 435-440页

作者： Ming Wang Jian Wan Yan Zhao Science and Technology On Blind Signal Processing Laboratory No.118 Yihuanluxiyiduan Road Wuhou District Chengdu610041 China

Most of nonuniform filter banks designed by existing methods are not linear phase. In order to solving the problem, a novel method for designing linear-phase nonuniform filter banks is proposed in this paper. By analyzing the filter banks structure with block decimation transformed to rational decimation, we get an interpolated filter banks structure which removes the mirror frequency brought from interpolation. The filter banks are obtained by cosine modulation in this paper, and the prototype filters are interpolated and filtered before modulation. To make sure the significant aliasing distortions are cancelled completely, all prototype filters are designed with consistent transition band performance, using the optimization algorithm. Simulation results demonstrate that the linear-phase nonuniform filter banks designed by the proposed method have small amplitude distortions and aliasing distortions.

关键词： Linear-Phase Nonuniform Filter Banks aliasing distortion cosine modulation interpolated

来源：评论

学校读者我要写书评

暂无评论

Numerical simulation and identification of fractional systems using Digital Adjustable Fractional order integrator

Numerical simulation and identification of fractional system...

引用

European Control Conference (ECC)

作者： A. Djouambi A. Charef A. Voda The Department of Science and Technology University Larbi Ben M'Hidi of Oum El-Bouaghi Oum El-Bouaghi Algeria Signal Processing Laboratory University Mentouri of Constantine Route de Ain El Bey Algeria University Joseph Fourier Grenoble 1/CNRS UMR Martin d'Hères France

ISBN: (纸本)9781479901890

A new method for numerical simulation and parameter identification of fractional order models is presented in this paper. A Digital Adjustable Fractional Integrator is proposed to improve the numerical simulation of fractional order systems. The main feature of this tool consists in: the important reduction of simulation run time, operate as a one-step forward predictor and, consequently, it can be used for real-time numerical simulation and identification of different fractional order systems using the same structure. The consistence, convergence and stability of the proposed method are proved. Finally, some numerical results are presented to demonstrate the effectiveness of the proposed approximation.

关键词： Mathematical model Numerical simulation Numerical models Equations Function approximation Computational modeling

来源：评论

学校读者我要写书评

暂无评论

Multiple pathways network description of motor neurons in locusts: An information sensitivity analysis

Multiple pathways network description of motor neurons in lo...

引用

Biosignals and Biorobotics Conference (BRC), ISSNIP

作者： Wagner Endo Carlos D. Maciel David M. Simpson Philip L. Newland Department of Electrical Engineering Federal University of Technology-Paraná Cornelio Procopio Parana Brazil Signal Processing Laboratory Department of Electrical Engineering University of São Paulo Sao Carlos Sao Paulo Brazil Institute of Sound and Vibration Research University of Southampton Southampton UK School of Biological Science University of Southampton Southampton UK

Information sensitivity analysis is proposed for neural signals from spiking motor neurons that operate on the process moving legs of locusts. Our work presents an investigation from mechanical excitation to electrical output signals from spiking motor neurons driven by random Gaussian excitatory movements to a proprioceptor at the knee joint. From informationtheorectic sensitivity analysis is proposed an estimation of the associations among inputs and output signals. The estimation is quantified via a decomposition of their conditional mutual information and the pairwise interaction of information. A complex network is designed for modeling the motor neuronal system. The network is based on statistical dependences of information sensitivity. We applied the sensitivity analysis in neuro motor of locust called FETi (Fast Extensor Tibia) neuron. The results and some conclusions are presented.

关键词： Mutual information Neurons Sensitivity analysis Complex networks Analytical models Estimation

来源：评论

学校读者我要写书评

暂无评论

A novel anonymous secret sharing scheme based on BP Artificial Neural Network

A novel anonymous secret sharing scheme based on BP Artifici...

引用

2012 8th International Conference on Natural Computation, ICNC 2012

作者： Zhong, Hong Wei, Xiaodong Shi, Runhua Key Laboratory of Intelligent Computing and Signal Processing Anhui University Ministry of Education China School of Computer Science and Technology Anhui University China

ISBN: (纸本)9781457721311

In an anonymous secret sharing scheme, the secret can be reconstructed without knowledge of which participant hold which share. That is, in such scheme the secret can be recovered from the shares without the identities of shareholders. However, the previous anonymous schemes are not very efficient and the existing bounds make optimization work difficult. In this paper, we present a novel anonymous secret sharing scheme by using BP Artificial Neural Network. The scheme can ensure that the shareholders' identities are completely anonymous when the secret is recovered. Unlike previous schemes, our scheme is an ideal (t, n) threshold scheme which parameter t doesn't have lower bounds and need less storage space. Furthermore, the shares can be chosen by shareholders and the communication between dealer and participants doesn't need secure channel. In addition, the participants can verify the correctness of their shares and the secret S. © 2012 IEEE.

关键词： Neural networks

来源：评论

学校读者我要写书评

暂无评论

Pilot anaerobic plant's description, modeling and output feedback control

Pilot anaerobic plant's description, modeling and output fee...

引用

Chinese Control Conference (CCC)

作者： Haoping Wang Yang Tian Boyko Kalchev Ivan Simeonov Nicolai Christov Sino-French Joint Laboratory of Automation and Signal Processing School of Automation Nanjing University of Science and Technology Nanjing Jiangsu CN Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Bulgaria Bulgaria LAGIS-CNRS UMR 8219 Villeneuve d'Ascq France LAGIS-CNRS UMR 8219 Villeneuve d'Ascq Villeneuve d'Ascq France

This paper deals with the description, mathematical modeling and recursive output feedback control of a pilot anaerobic plant. Based on experimental results obtained during the start-up and operating of a pilot bioreactor, a five-order continuous-time anaerobic digestion model is obtained. The output trajectory tracking and disturbance compensation for the bioprocess model are realized using a new composed recursive controller comprising a recursive model free stabilization term and a recursive time delay compensation term. The performances of the new bioprocess controller are compared by numerical simulation with the performances of an existing nonlinear proportional-integral controller.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A novel distributed machine learning method for classification: Parallel covering algorithm

A novel distributed machine learning method for classificati...

引用

7th International Conference on Rough Sets and Knowledge technology, RSKT 2012

作者： Zhang, Yanping Wang, Yuehua Zhao, Shu Anhui University Computer Science and Technology Institute Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education Hefei Anhui Province 230039 China

ISBN: (纸本)9783642318993

In this paper, we propose a novel distributed machine learning method: Parallel Covering Algorithm, which is inspired by the module feature of CA (Covering Algorithm). Classic method of CA is presented, and we analyze its independent part. Then we develop the Parallel CA by utilizing its modularity as well as data-set decomposition. Detailed implementation of the parallel computing process is described. In the experiment, three data sets are used to evaluate the Parallel CA, and the comparison with classic CA is also shown in the paper. Speedup and efficiency are two criterions to evaluate the performance of the algorithm. Both the analysis and the comparison indicate that the Parallel CA is more effective than CA. We also empirically compare the results obtained by Parallel SVM on a large data set, and it shows that our proposed algorithm is effective. © 2012 Springer-Verlag.

关键词： Learning algorithms

来源：评论

学校读者我要写书评

暂无评论

Airborne GMTI experiment based on multi-channel synthetic aperture radar using space time adaptive processing

Airborne GMTI experiment based on multi-channel synthetic ap...

引用

作者： Yang, Zhiwei Liao, Guisheng He, Shun Zeng, Cao National Laboratory of Radar Signal Processing Xidian University 710071 China Communication and Information Engineering College Xian University of Science and Technology 710054 China

The non-ideal conditions of real-world detection environments, such as beam-pattern mismatch, non-ideal sensor geometry, receiver channel imbalance and clutter heterogeneity, can preclude the performance described in much of the theoretical STAP literature. For the purpose of overcoming those problems, a new target detection and location approach with low complexity is proposed. This presented algorithm is performed in three stages, i.e. array manifold adaptive calibration, clutter rejection in Winner filter sense and target parameters estimation using modified single-snapshot multiple direction of arrival estimation method. The array manifold calibration procedure uses a power-based criterion to reject a weak clutter patch and/or target for covariance matrix estimation, meanwhile, a phase-based criterion is adopted to alleviate the strong target signal contamination problem. Once the array has been calibrated, adaptive clutter and/or jamming cancellation can be achieved in the Wiener filter sense. This step does not require angle-Doppler bin searching. The last stage is carried out at the determinate range-Doppler test cell to locate moving target by azimuth searching for that one fitting best to the moving target signal, thus the location performance would not be sacrificed in order to suppress clutter and/or interference and the high resolution radial velocity estimation can be achieved. Therefore, the proposed algorithm is computationally inexpensive and is better suited to work in real-world detection environments. A preliminary result against an airborne experimental data demonstrates the effectiveness of the proposed method. © 2011 Elsevier Masson SAS. All rights reserved.

关键词： Space time adaptive processing

来源：评论

学校读者我要写书评

暂无评论

Obtaining Higher-Order Derivatives of Low-Frequency signals Using Multirate signal processing

Obtaining Higher-Order Derivatives of Low-Frequency Signals ...

引用

IEEE International Instrumentation and Measurement technology Conference

作者： Li Tan Jean Jiang Liangmo Wang Signal Processing and Instrumentation Laboratory College of Engineering and Technology Purdue University North Central Westville Indiana 46391 School of Mechanical Engineering Nanjing University of Science and Technology Nanjing P. R. China

ISBN: (纸本)9781467346214

In this paper, a multi-rate signal processing technique is proposed for obtaining higher-order derivatives of digital signals with an improved signal-to-quantization noise ratio (SQNR). The technique consists of a classical oversampling analog-to-digital conversion (ADC) unit with a dithering process and multi-stage down sampling processing followed by a high performance digital differentiator cascaded using a decimator with a factor of two. In the cascaded multi-stage processing, each stage contains a simple half-band low-pass filter followed with decimation by two. The proposed technique uses an extremely small FIR filter size, hence requires much less memory and computational complexity in comparison with single-stage processing. Computer simulations and experimental data processing demonstrate the effectiveness of the proposed method.

关键词： Oversampling FIR digital differentiator higher-order derivative multi-rate signal processing

来源：评论

学校读者我要写书评

暂无评论

A medical image fusion method based on visual models 1

引用

9th International Symposium on Neural Networks, ISNN 2012

作者： Qu, Jingyi Jia, Yunfei Du, Ying Tianjin Key Laboratory for Advanced Signal Processing Civil Aviation University Tianjin 300300 China School of Science East China University of Science and Technology Shanghai 200237 China

ISBN: (数字)9783642313622

ISBN: (纸本)9783642313615

A new method of medical image fusion is proposed in this paper, which is based on human visual models and IHS color space. Retina-inspired difference of Gaussian model is adopted to enhance the spatial information of anatomical images. Also, 2D Log-Gabor model of primary visual cortex is used to enhance the spectrum information of functional images. The statistical analyses tools such as average gradient and entropy are demonstrated that the proposed algorithm does considerably increase spatial information content and reduce the color distortion compared to the counterpart fusion methods. In the proposed fused images the color information is least distorted, the spatial details are as clear as the original anatomical images, and the integration of color and spatial features was normal. © 2012 Springer-Verlag.

关键词： Image fusion

来源：评论

学校读者我要写书评

暂无评论

A membrane evolutionary algorithm for DNA sequence design in DNA computing

引用

Chinese science Bulletin 2012年第6期57卷 698-706页

作者： XIAO JianHua ZHANG XingYi XU Jin The Research Center of Logistics Nankai UniversityTianjin 300071China Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education School of Computer Science and TechnologyAnhui UniversityHefei 230039China School of Electronics Engineering and Computer Science Peking UniversityBeijing 100871China

DNA sequence design has a crucial role in successful DNA computation,which has been proved to be an NP-hard(non-deterministic polynomial-time hard) *** this paper,a membrane evolutionary algorithm is proposed for the DNA sequence design *** results of computer experiments are reported,in which the new algorithm is validated and out-performs certain known evolutionary algorithms for the DNA sequence design problem.

关键词： DNA计算进化算法序列设计 DNA序列膜设计问题多项式时间计算机实验

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：