检索结果-内蒙古大学图书馆

Blind source separation and wavelet packet based novel harmonic retrieval algorithm 6th

6th International Conference on Swarm Intelligence, ICSI 2015 held in conjunction with the 2nd BRICS Congress on Computational Intelligence, CCI 2015

作者： Wang, Fasong Wang, Zhongyong Li, Rui Zhang, Linrang School of Information Engineering Zhengzhou University Zhengzhou450001 China School of Sciences Henan University of Technology Zhengzhou China National Key Laboratory for Radar Signal Processing Xidian University Xi’an China

ISBN: (纸本)9783319204710

In this paper, a novel one dimensional harmonic retrieval (HR) algorithm is proposed, which can be applied in additive colored Gaussian or non- Gaussian noise when the frequencies of the harmonic signals are closely spaced in frequency domain. Resorting to the blind source separation (BSS) based harmonic retrieval model, the main algorithm is developed mainly using the wavelet packet (WP) decomposition approach, where the criterion is formed as the cumulant based approximation of the mutual information (MI) for the selection of optimal sub-band of WP decomposition with the least-dependent components between the same nodes. Simulation results show that the proposed algorithm can retrieve the harmonic source signals and yield good performance. © Springer International Publishing Switzerland 2015.

关键词： Blind source separation

来源：评论

学校读者我要写书评

暂无评论

Target Detection technology in Passive radar based on Broadcasting Satellite signals

Target Detection technology in Passive Radar based on Broadc...

引用

International Conference on Computer science and Mechanical Automation

作者： Qintian YU Huafeng PENG Science and Technology on Blind Signal Processing Laboratory

ISBN: (纸本)9781467391672

Aiming at the technology of target detection based on broadcasting satellite passive radar. This paper presents the characteristic of broadcasting satellite signals and its ambiguity function. Calculates the maximum detection distance by analyzing the power loss and the gain of signal processing. Demonstrates the necessity of depressing the direct satellite signals. The conclusion of this paper is: The broadcasting satellite signal is suitable for passive radar target detection. The detection distance can achieve 100km with 36MHz signal bandwidth, 60dB gain of antenna, Is integrated time. Appropriate methods is necessary to depress the direct wave received from the side lobe of echo antenna. The possibility of this target detection method is proved by the experiment results in this paper.

关键词： Passive radar Satellite signals Detection distance Target Antenna pattern

来源：评论

学校读者我要写书评

暂无评论

Coherent motion of chaotic attractors

引用

Physical Review E 2017年第4期96卷 042210-042210页

作者： Patrick Louodop Suman Saha Robert Tchitnga Paulsamy Muruganandam Syamal K. Dana Hilda A. Cerdeira São Paulo State University (UNESP) Instituto de Física Teórica Rua Dr. Bento Teobaldo Ferraz 271 Bloco II Barra Funda 01140-070 São Paulo Brazil Laboratory of Electronics and Signal Processing Faculty of Science Department of Physics University of Dschang P.O. Box 67 Dschang Cameroon Dumkal Institute of Engineering and Technology Murshidabad 742406 India Department of Instrumentation and Electronics Engineering Jadavpur University Kolkata 700090 India Institute of Surface Chemistry and Catalysis University of Ulm Albert-Einstein-Allee 47 89081 Ulm Germany Department of Physics Bharathidasan University Tiruchirapalli 620024 Tamil Nadu India Department of Mathematics Jadavpur University Kolkata 700032 India Centre for Complex System Research Kolkata Kolkata 700094 India

We report a simple model of two drive-response-type coupled chaotic oscillators, where the response system copies the nonlinearity of the driver system. It leads to a coherent motion of the trajectories of the coupled systems that establishes a constant separating distance in time between the driver and the response attractors, and their distance depends upon the initial state. The coupled system responds to external obstacles, modeled by short-duration pulses acting either on the driver or the response system, by a coherent shifting of the distance, and it is able to readjust their distance as and when necessary via mutual exchange of feedback information. We confirm these behaviors with examples of a jerk system, the paradigmatic Rössler system, a tunnel diode system and a Josephson junction–based jerk system, analytically, to an extent, and mostly numerically.

关键词： Coupled oscillators Synchronization

来源：评论

学校读者我要写书评

暂无评论

Author Correction: Brain clocks capture diversity and disparities in aging and dementia across geographically diverse populations

引用

Nature medicine 2024年第12期30卷 3779页

作者： Sebastian Moguilner Sandra Baez Hernan Hernandez Joaquín Migeot Agustina Legaz Raul Gonzalez-Gomez Francesca R Farina Pavel Prado Jhosmary Cuadros Enzo Tagliazucchi Florencia Altschuler Marcelo Adrián Maito María E Godoy Josephine Cruzat Pedro A Valdes-Sosa Francisco Lopera John Fredy Ochoa-Gómez Alfredis Gonzalez Hernandez Jasmin Bonilla-Santos Rodrigo A Gonzalez-Montealegre Renato Anghinah Luís E d'Almeida Manfrinati Sol Fittipaldi Vicente Medel Daniela Olivares Görsev G Yener Javier Escudero Claudio Babiloni Robert Whelan Bahar Güntekin Harun Yırıkoğulları Hernando Santamaria-Garcia Alberto Fernández Lucas David Huepe Gaetano Di Caterina Marcio Soto-Añari Agustina Birba Agustin Sainz-Ballesteros Carlos Coronel-Oliveros Amanuel Yigezu Eduar Herrera Daniel Abasolo Kerry Kilborn Nicolás Rubido Ruaridh A Clark Ruben Herzog Deniz Yerlikaya Kun Hu Mario A Parra Pablo Reyes Adolfo M García Diana L Matallana José Alberto Avila-Funes Andrea Slachevsky María I Behrens Nilton Custodio Juan F Cardona Pablo Barttfeld Ignacio L Brusco Martín A Bruno Ana L Sosa Ortiz Stefanie D Pina-Escudero Leonel T Takada Elisa Resende Katherine L Possin Maira Okada de Oliveira Alejandro Lopez-Valdes Brian Lawlor Ian H Robertson Kenneth S Kosik Claudia Duran-Aniotz Victor Valcour Jennifer S Yokoyama Bruce Miller Agustin Ibanez Latin American Brain Health Institute Universidad Adolfo Ibañez Santiago de Chile Chile. Cognitive Neuroscience Center Universidad de San Andrés Buenos Aires Argentina. Department of Neurology Massachusetts General Hospital and Harvard Medical School Boston MA USA. Universidad de los Andes Bogota Colombia. Global Brain Health Institute (GBHI) University of California San Francisco CA USA. Global Brain Health Institute (GBHI) Trinity College Dublin Dublin Ireland. The University of California Santa Barbara (UCSB) Santa Barbara CA USA. Escuela de Fonoaudiología Universidad San Sebastián Santiago de Chile Chile. Grupo de Bioingeniería Decanato de Investigación Universidad Nacional Experimental del Táchira San Cristóbal Venezuela. Advanced Center for Electrical and Electronic Engineering Universidad Técnica Federico Santa María Valparaíso Chile. University of Buenos Aires Buenos Aires Argentina. The Clinical Hospital of Chengdu Brain Sciences Institute University of Electronic Sciences and Technology of China Chengdu China. Technology of China Chengdu China. Cuban Neuroscience Center La Habana Cuba. Grupo de Neurociencias de Antioquia (GNA) University of Antioquia Medellín Colombia. Department of Psychology Master Program of Clinical Neuropsychology Universidad Surcolombiana Neiva Neiva Colombia. Department of Psychology Universidad Cooperativa de Colombia Arauca Colombia. Neurocognition and Psychophysiology Laboratory Universidad Surcolombiana Neiva Colombia. Reference Center of Behavioural Disturbances and Dementia School of Medicine University of Sao Paulo Sao Paulo Brazil. Traumatic Brain Injury Cognitive Rehabilitation Out-Patient Center University of Sao Paulo Sao Paulo Brazil. Center for Social and Cognitive Neuroscience School of Psychology Universidad Adolfo Ibáñez Santiago Chile. Neuropsychology and Clinical Neuroscience Laboratory (LANNEC) Physiopathology Program-Institute of Biomedical Sciences (ICBM) Neuroscience and East Neuroscience Dep

来源：评论

学校读者我要写书评

暂无评论

Poly-phase coded waveform design with expanded mainlobe width

Poly-phase coded waveform design with expanded mainlobe widt...

引用

IEEE radar Conference

作者： Zang, Huikai Zhou, Shenghua Li, Qiang Liu, Hongwei Wang, Hongxian Cao, Yunhe National Laboratory of Radar Signal Processing Xidian University China Collabroative Innovation Center of Information Sensing and Understanding Xidian University Xian Shannxi China China Academy of Launch Vehicle Technology Beijing China

ISBN: (纸本)9781467396554

Poly-phase coded waveform design with low sidelobe level is an important issue. The sidelobe level of a poly-phase coded waveform achieved by a waveform design algorithm often depends on the degrees of freedom available for optimization. In this paper, we introduce a concept to exploit more degrees of freedom for a given pulse time duration, by allowing for more codes inside whereas keeping a low range resolution. Based on this concept, a waveform design criterion, which is a minimax optimization problem, is proposed. The optimization problem is solved by the least-pth algorithm which uses the L-BFGS as its sub-algorithm. Numerical results show that the additional degrees of freedom can decrease the peak sidelobe level of polyphase coded waveform from -32.6dB for 64 codes to -37.0dB for 256 codes with the same range resolution and pulse width. © 2015 IEEE.

关键词： Optimization

来源：评论

学校读者我要写书评

暂无评论

Phoneme Recognition Based on Deep Belief Network

Phoneme Recognition Based on Deep Belief Network

引用

International Conference on Information System and Artificial Intelligence (ISAI)

作者： Yue Xie Cai-Rong Zou Rui-Yu Liang Hua-Wei Tao Laboratory of Underwater Acoustic Signal Processing Southeast University Nanjing China College of Electrical Engineering Guangzhou University Guangzhou China College of Communication Engineering Nanjing Institute of Technology Nanjing China School of Information Science and Engineering Southeast University Nanjing China

ISBN: (纸本)9781509015863

To improve the accuracy of phoneme recognition in continuous speech recognition, a new method based on the deep belief network which can extract the posterior probability of phonemeis proposed. Firstly, a deep belief network is pre-trained layer by layer with Restricted Boltzmann Machine, then by adding an output layer called "softmax" to the network, a deep neural network detecting the posterior probability of phoneme can be created. Subsequently, Backward Propagation algorithm is applied to fine-tune the weights discriminatively and make them better at predicting the probability distribution over the states of hidden Markov models. Finally the sequence of the predicted probability distribution is fed into a standard Viterbi decoder. The experiments show that the proposed method has a better performance on the TIMIT dataset than traditional ways.

关键词： Speech recognition Hidden Markov models Training Speech Data models Speech processing Acoustics

来源：评论

学校读者我要写书评

暂无评论

Proportional integral sliding mode observer for uncertain Takagi Sugeno systems with unknown inputs 7

Proportional integral sliding mode observer for uncertain Ta...

引用

7th International Conference on Modelling, Identification and Control, ICMIC 2015

作者： Elleuch, Ilyes Khedher, Atef Othmen, Kamel Ben Research Laboratory in Automatic Signal Processing and Imaging NationalSchool of Engineers Monastir Tunisia Research Laboratory: LARA Automatic ENIT Higher Institute of Applied Science and Technology Gafsa Tunisia

ISBN: (纸本)9780956715753

This paper deals with the problem of state and faults estimation for nonlinear uncertain systems described by Takagi Sugeno structures (named multiple models). In this work, only actuator are considered, they are considered as unknown inputs. The state and faults estimation is made using a structure of sliding mode observer where an integral term is added. This structure of observer is named proportional integral sliding mode observer. The integral term permits the fault estimation. The observer convergence conditions are formulated in LMI form allowing to compute the observer gains. The proposed proportional integral sliding mode observer is applied in the case of a numerical example showing the efficiency of the fault and state estimation. © 2015 University of Al Qayrawan, Tunisia.

关键词： State estimation

来源：评论

学校读者我要写书评

暂无评论

Image authentication and self-recovery scheme based on the rehashing model

引用

Journal of Information Hiding and Multimedia signal processing 2016年第3期7卷 460-474页

作者： Lyu, Wan-Li Chang, Chin-Chen Wang, Feng Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education School of Computer Science and Technology Anhui University Hefei230039 China Department of Information Engineering and Computer Science Feng Chia University 100 Wenhwa Rd. Seatwen Taichung40724 Taiwan Department of Computer Science and Information Engineering Asia University Taichung41354 Taiwan Department of Mathematics and Physics Fujian University of Technology FuzhouFujian350108 China

An effective image tamper localization and self-recovery scheme that uses the rehashing model is proposed in this paper. The aim of the proposed scheme was to reduce the failure rate in detecting image tamper areas and achieve high rates of successful detection. To achieve this aim, the proposed scheme uses a set of hash functions which are called the rehashing model, gained an optimal decreasing collision method to detect tamper areas With an improved and accurate tamper detection rate, the tampered image can be recovered more accurately. The quality of the proposed scheme was tested with gray and color images. The experimental results indicated that the proposed scheme has good performance in locating tamper locations and allows image recovery with an acceptable visual quality up to 50% of the image content tampered. © 2016.

关键词： Hash functions

来源：评论

学校读者我要写书评

暂无评论

Speech Recognition and Synthesis Algorithm for Digital Hearing Aids under Background Noise

Speech Recognition and Synthesis Algorithm for Digital Heari...

引用

International Conference on Information System and Artificial Intelligence (ISAI)

作者： Ming-Yang Zhang Cai-Rong Zou Rui-Yu Liang Li Zhao Laboratory of Under water Acoustic Signal Processing Southeast University Nanjing China College of Electrical Engineering Guangzhou University Guangzhou China College of Communication Engineering Nanjing Institute of Technology Nanjing China School of Information Science and Engineering Southeast University Nanjing China

ISBN: (纸本)9781509015863

The difficulty of speech comprehension under background noise greatly influenced the use of hearing aids. To address this problem, this paper proposes a new hearing aids algorithm based on speech recognition and synthesis. This method is based on the pure speech to build a parameters database. Under the real noisy scene, implement speech recognition for the input speech, and then extract the corresponding parameters according to the results of the recognition and synthesize the pure speech. To improve the noise robustness of speech recognition system, we use a newly proposed kernel power flow orientation coefficients (KPOCs) as the characteristic parameters for training and testing. Because the speech synthesis is based on the parameters of pure speech, the output speech almost does not contain noise, and the difficulty of speech comprehension has great improvement.

关键词： Speech Speech recognition Hidden Markov models Feature extraction Speech processing Kernel Hearing aids

来源：评论

学校读者我要写书评

暂无评论

Feasibility of FRI-based square-wave reconstruction with quantization error and integrator noise 40

Feasibility of FRI-based square-wave reconstruction with qua...

引用

40th IEEE International Conference on Acoustics, Speech, and signal processing, ICASSP 2015

作者： He, Bryan Wein, Alexander Srinivasan, Lakshminarayan Department of Computer Science California Institute of Technology United States Department of Mathematics Massachusetts Institute of Technology United States Neural Signal Processing Laboratory Stanford University United States

ISBN: (纸本)9781467369978

Conventional Nyquist sampling and reconstruction of square waves at a finite rate will always result in aliasing because square waves are not band limited. Based on methods for signals with finite rate of innovation (FRI), generalized Analog Thresholding (gAT-n) is able to sample square waves at a much lower rate under ideal conditions. The target application is efficient, real-time, implantable neurotechnology that extracts spiking neural signals from the brain. This paper studies the effect of integrator noise and quantization error on the accuracy of reconstructed square waves. We explore realistic values for integrator noise and input signal amplitude, using specifications from the Texas Instruments IVC102 integrator chip as a first-pass example because of its readily-available data sheet. ADC resolution is varied from 1 to 16 bits. This analysis indicates that gAT-1 is robust against these hardware non-idealities where gAT-2 degrades less gracefully, which makes gAT-1 a prime target for hardware implementation in a custom integrated circuit. © 2015 IEEE.

关键词： analog thresholding compressed sensing electrode arrays finite rate of innovation massive-scale neural recording neurotechnology optical methods square wave sub-Nyquist

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：