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signal, Information and Data processing (ICSIDP), IEEE International Conference on

作者： Feng Tian Yuekun Wang Zhibin Wang Zhiqiang Liao Zhiyong Suo Zhenfang Li Wei Yan Jiwei Hu National Key Laboratory of Radar Signal Processing Xidian University Xi'an China Nanjing Research Institute of Electronics Technology Nanjing China Beijing Institute of Spacecraft System Engineering Beijing China Sichuan Aerospace Electronic Equipment Research Institute Sichuan China China Academy of Space Technology Xi'an Brance Xi'an Chinas

ISBN: (数字)9781728123455

ISBN: (纸本)9781728123462

Compared to other wave bands, interferometric synthetic aperture radar (InSAR) system employed millimeter wave equipment is capable of providing finer spatial resolution and higher measurement accuracy with smaller volume and lighter weight. However, the shorter wave length, which is more sensitive to the range error, also brings some problems in SAR/InSAR data processing. In this paper, a complete processing chain is investigated to generate high-precision digital elevation model (DEM) starting from the millimeter wave radar raw data. Experimental results obtained by the proposed approach are presented and discussed with the real measured airborne millimeter wave SAR data.

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An Online Updating Multi-Threshold Method for Mobility Relationship Mining 9

An Online Updating Multi-Threshold Method for Mobility Relat...

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2017 9th IEEE International Conference on Communication Software and Networks (ICCSN 2017)

作者： Zeng Chen Keren Wang Zhengguo Xu Jiaqi Yao National Key Laboratory of Science and Technology on Blind Signal Processing

ISBN: (纸本)9781509038237;9781509038220

With the popularity of the mobile phones and location-based social networks, rich location data has become widely available nowadays, enabling study on friendship detection based on human mobility. However, in some circumstances, limited by data collection techniques, only discrete location（such as location IDs） can be fetched which leads to methods of detecting friendship based on distance metric is unrealistic. This paper aims to detect friendship among users based on their mobility data where locations are represented by location IDs. By considering each user’s preference for location and each location’s popularity, the difference between friends and strangers gets larger than using merely frequency of meeting events. However, we discover that measure values obtained may vary greatly among different users and propose to maintain a threshold for each user. In addition, an online updating algorithm is presented to update thresholds when a new user’s mobility data is available. Experiments conducted on MIT Reality Mining project dataset show that the proposed updating method is practical and the proposed multi-threshold model outperforms the state-of-theart methods proposed by Wang et al.

关键词： friendship detection multi-threshold mobility spatiotemporal online update

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Modeling of graphene based strong coulping nanodevice

Modeling of graphene based strong coulping nanodevice

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International Applied Computational Electromagnetics Society Symposium (ACES)

作者： Xingang Ren Yong Wang Hao Ren Zhixiang Huang Xianliang Wu Guangdong Provincial Key Laboratory of Nano-Micro Materials Research Peking University Shenzhen Graduate School Shenzhen China Ministry of Education Institute of Physical Science and Information Technology Key Laboratory of Intelligent Computing & Signal Processing Anhui University Hefei China

ISBN: (数字)9780996007894

ISBN: (纸本)9781728146331

The monolayer graphene has received intensive attention due to its unique characteristics, such as atomic thickness, tunable Fermi level by doping. Here, we will present comprehensive studies from theoretical modeling to application of graphene based nanodevice. Our work indicates that graphene can be considered as bulk material with an effective thickness. In addition, we propose graphene as nanospacer forming a strong coupling sandwiched nanodevice, which realizes strong coupling between localized surface plasmon of metal nanoparticle and surface plasmon of planar metal film. Our work is of critical importance for graphene modeling and applications.

关键词： Graphene Plasmons Conductivity Metals Couplings Permittivity Sensors

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Using integer and fractional measure for processing and recognitions of small and distorted images in optical location and medicine

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The Journal of Engineering 2019年第21期2019卷 7419-7423页

作者： Alexander A. Potapov Vitaly A. German Andrey A. Pakhomov Vladimir I. Grachev Wei Zhang Tianhua Feng V.A. Kotelnikov Institute of Radioengineering and Electronics Russian Academy of Sciences Moscow Russia JNU-IREE Joint Laboratory of Fractal Method & Signal Processing Department of Electronic Engineering College of Information Science and Technology JiNan University Guangzhou People's Republic of China

The present work develops the mathematical base of ill-posed inverse problems in optics, as well as a method of processing and reconstructing scenes from incomplete information of their Fourier spectra. This problem is a part of the general problem of the eliminating the influence atmospheric and optical distortion when finding and registering an object at large distances under bad atmospheric conditions. The designed programmed methods are also used to process medical images.

关键词： inverse problems medical image processing image reconstruction optical distortion biomedical optical imaging medical images fractional measure distorted images optical location medicine ill-posed inverse problems Fourier spectra optical distortion bad atmospheric conditions scenes reconstruction integer measure

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Correction of “A Frequency-Domain Imaging Algorithm for Translational Variant Bistatic Forward-Looking SAR”

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IEEE Transactions on Geoscience and Remote Sensing 2020年第8期58卷 5820-5820页

作者： Haiwen Mei Yachao Li Mengdao Xing Yinghui Quan Chunfeng Wu National Laboratory of Radar Signal Processing Xidian University Xi’an China Collaborative Innovation Center of Information Sensing and Understanding Xidian University Xi’an China Chengdu Aerospace Science and Industry Microelectronics System Research Institute Chengdu China

In [1] , the result of Fig. 13(b) was incorrectly provided. Now, we provide the corrected result, as shown in Fig. 1 .

关键词： Imaging signal processing radar

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Weighted Multidimensional Scaling Localization of a Known Altitude Object Using TOA Measurements

Weighted Multidimensional Scaling Localization of a Known Al...

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2018 International Conference on Computer, Electronic Information and Communications(CEIC 2018)

作者： Bing DENG Yu-cheng WENG Zheng-bo SUN National Key Laboratory of Science and Technology on Blind Signal Processing China Southern Airlines

This paper considers the problem of geolocating a target on the Earth surface whose altitude is known using the target signal time of arrival(TOA) measurements. The geolocation Cramer-Rao lower bound(CRLB) is derived and the performance improvement due to the availability of target altitude information is quantified. An weighted multidimensional scaling geolocation solution is developed. Its sensitivity to the target altitude error is also studied. Simulations verify the theoretical developments and illustrate the good performance of the proposed geolocation method.

关键词： Time of arrival Multidimensional scaling Target altitude

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Gas Composition Recognition Based on Analyzing Acoustic Relaxation Absorption Spectra:Wavelet Decomposition and Support Vector Machine Classifier

Gas Composition Recognition Based on Analyzing Acoustic Rela...

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2018 2nd International Conference on Electrical Engineering and Automation（ICEEA2018）

作者： Yaqiong Jia Bin Yu Mingdi Du Xiaoli Wang Department of Electronics and Information Engineering Key Laboratory of Signal &Information Processing Hunan Institute of Technology Department of Computer and Information Science Key Laboratory of Signal & Information Processing Hunan Institute of Technology

Gas acoustic spectrum represents properties of acoustic propagation, which can distinguish gas compositions. However in few existing methods of gas-composition-unknown recognition, the approaches of programmatically processing the acoustic spectrum curves have not yet been presented. We propose a method for gas-composition-unknown recognition by analyzing gas acoustic relaxation absorption spectrum(GARAS) based on wavelet multi-resolution analysis(MRA) and multi-class support vector machine(SVM). Features of GARAS are extracted by wavelet MRA, and then selected to obtain a few feature coefficients which are utilized to train and test multi-class SVM. Simulation results show that the proposed method completely classifies four examples of gas mixtures, and that it recognizes the mixtures with the same and similar concentration or temperature. This method realizes the numerically extracting and programmatically processing the information of GARAS, and implements gas-composition-unknown sensing based on acoustic spectrums.

关键词： gas compositions recognition gas acoustic relaxation absorption spectrum wavelet multi-resolution analysis multi-class support vector machine

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Application of fractional calculus for impact oscillator modeling

Application of fractional calculus for impact oscillator mod...

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2019 International Conference on Intelligent Computing, Automation and Systems, ICICAS 2019

作者： Rekhviashvili, Sergo Pskhu, Arsen Potapov, A. Feng, Tianhua Narozhnov, Viktor Department of Theoretical and Mathematical Physics Institute of Applied Mathematics and Automation KBSC RAS Nalchik Russia JNU-IREE RAS Joint Laboratory of Information Techniques and Fractal Signal Processing Jinan University Guangzhou China Department of Fractional Calculus Institute of Applied Mathematics and Automation KBSC RAS Nalchik Russia Institute of Radioengineering and Electronics RAS Moscow Russia Department of Electronic Engineering College of Information Science and Technology Jinan University Guangzhou China Laboratory of Measurement Automation Institute of Applied Mathematics and Automation KBSC RAS Nalchik Russia

ISBN: (纸本)9781728161068

A new theoretical model for describing an impact oscillator that is based on the use of a fractional derivative is constructed. The acoustic signals that occur when the probe strikes the surface of metals are experimentally investigated. It is shown that acoustic signals can be used to diagnose elastic properties of materials. © 2019 IEEE.

关键词： Energy dissipation

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Harmony-Search and Otsu based System for Coronavirus Disease (COVID-19) Detection using Lung CT Scan Images

arXiv

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arXiv 2020年

作者： Rajinikanth, V. Dey, Nilanjan Raj, Alex Noel Joseph Hassanien, Aboul Ella Santosh, K.C. Raja, N. Sri Madhava Department of Electronics and Instrumentation Engineering St. Joseph’s College of Engineering Chennai600119 India Department of Information Technology Techno India College of Technology KolkataWest Bengal700156 India Key Laboratory of Digital Signal and Image Processing of Guangdong Province Department of Electronic Engineering College of Engineering Shantou University Shantou Guangdong China Faculty of Computers and Artificial Intelligence Cairo University Egypt Department of Computer Science University of South Dakota 414 E Clark St VermillionSD57069 United States

Pneumonia is one of the foremost lung diseases and untreated pneumonia will lead to serious threats for all age groups. The proposed work aims to extract and evaluate the Coronavirus disease (COVID-19) caused pneumonia infection in lung using CT scans. We propose an image-assisted system to extract COVID-19 infected sections from lung CT scans (coronal view). It includes following steps: (i) Threshold filter to extract the lung region by eliminating possible artifacts;(ii) Image enhancement using Harmony-Search-Optimization and Otsu thresholding;(iii) Image segmentation to extract infected region(s);and (iv) Region-of-interest (ROI) extraction (features) from binary image to compute level of severity. The features that are extracted from ROI are then employed to identify the pixel ratio between the lung and infection sections to identify infection level of severity. The primary objective of the tool is to assist the pulmonologist not only to detect but also to help plan treatment process. As a consequence, for mass screening processing, it will help prevent diagnostic burden. Copyright © 2020, The Authors. All rights reserved.

关键词： Coronavirus

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Precoded OFDM over underwater acoustic channels 13

Precoded OFDM over underwater acoustic channels

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13th ACM International Conference on Underwater Networks and Systems, WUWNet 2018

作者： Tao, Jun An, Liang Yao, Shuai Zhou, Lin Han, Xiao Qin, Zhen Key Laboratory of Underwater Acoustic Signal Processing of the Ministry of Education School of Information Science and Engineering Southeast University Nanjing210096 China State Key Laboratory of Acoustics Institute of Acoustics Chinese Academy of Sciences Beijing100190 China Acoustic Science and Technology Laboratory Harbin Engineering University Harbin150001 China

ISBN: (纸本)9781450361934

The high peak-to-average power ratio (PAPR) and lack of frequency diversity are two well-known issues with orthogonal frequency-division multiplexing (OFDM) modulations, especially over underwater acoustic (UWA) channels. The precoding (spreading) technique is a viable way to simultaneously address the aforementioned issues, and it has long been researched in the wireless communication field. In the past decade, it has also gained increasing attention in multicarrier UWA communications. However, a comprehensive study on precoded OFDMs over UWA channels is still lacking. In this work, a unified system model accommodating linear precoding schemes is introduced for precoded OFDMs. Based on the model, a linear minimum mean square error (LMMSE) detector is developed for performance evaluation. Several typical precoding schemes are then evaluated and compared, in terms of PAPR and uncoded bit error rate (UBER), over the UWA channels measured in an at-sea experiment. This analysis showed the discrete Fourier transform (DFT) and the inverse DFT (IDFT) precoding schemes achieve the lowest PAPR. In terms of UBER, the DFT, IDFT, and discrete cosine transform (DCT) precodings achieved comparable performance that is significantly better than that of the standard OFDM over highly frequency-selective experimental channels. © 2018 Association for Computing Machinery.

关键词： Peak to average power ratio

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