检索结果-内蒙古大学图书馆

IEEE International Symposium on Biomedical Imaging

作者： Yo Seob Han Kyong Hwan Jin Kyungsang Kim Jong Chul Ye Dept. Bio & Brain Engineering Korea Advanced Institute of Science & Technology (KAIST) Center for Advanced Medical Imaging Sciences Massachusetts General Hospital and Harvard Medical School Bio-Imaging and Signal Processing Lab. (BISPL) Dept. Bio & Brain Engineering Korea Advanced Institute of Science & Technology (KAIST)

ISBN: (纸本)9781479923519

In a kVp switching-based sparse view spectral CT, each spectral image cannot be reconstructed separably by an analytic reconstruction method, because the projection views for each spectral band is too sparse. However, the underlying structure is common between the spectral bands, so there exists inter-spectral redundancies that can be exploited by the recently proposed annihilating filter-based low rank Hankel matrix approach (ALOHA). More specifically, the sparse view projection data are first rebinned in the Fourier space, from which Hankel structured matrix with missing elements are constructed for each spectral band. Thanks to the inter-spectral correlations as well as transform domain sparsity of underlying images, the concatenated Hankel structured matrix is low-ranked, and the missing Fourier data for each spectral band can be simultaneously estimated using a low rank matrix completion. To reduce the computational complexity furthermore, we exploit the Hermitian symmetry of Fourier data. Numerical experiments confirm that the proposed method outperforms the existing ones.

关键词： Computed tomography Image reconstruction Transforms TV Redundancy Switches Sparse matrices

来源：评论

学校读者我要写书评

暂无评论

A simulator for swarm AUVs acoustic communication networking 11

A simulator for swarm AUVs acoustic communication networking

引用

11th ACM International Conference on Underwater Networks and Systems, WUWNet 2016

作者： Li, Guannan Liu, Jun Wang, Xue Xu, Hongli Cui, Jun-Hong Shenyang Institute of Automation CAS University of Chinese Academy of Sciences No. 114 Nanta Street Shenhe District Shenyang China College of Computer Science and Technology Jilin University State Key Laboratory of Robotics Key Laboratory of System Control and Information Processing Ministry of Education of China Changchun China Shenyang Institute of Automation CAS Northeast University No. 114 Nanta Street Shenhe District Shenyang China Shenyang Institute of Automation CAS No. 114 Nanta Street Shenhe District Shenyang China College of Computer Science and Technology Jilin University Changchun China Underwater Sensor Network Lab. University of Connecticut StorrsCT06269 United States

ISBN: (纸本)9781450346375

This paper presents a simulator for swarm operations designed to verify algorithms for a swarm of autonomous underwater robots (AUVs), specifically for constructing an underwater communication network with AUVs carrying acoustic communication devices. This simulator consists of three nodes: a virtual vehicle node (VV), a virtual environment node (VE), and a visual showing node (VS). The modular design treats AUV models as a combination of virtual equipment. An expert acoustic communication simulator is embedded in this simulator, to simulate scenarios with dynamic acoustic communication nodes. The several simulations we have performed demonstrate that this simulator is easy to use and can be further improved.

关键词： Simulators

来源：评论

学校读者我要写书评

暂无评论

A novel method for the construction of evolutionary tree based on expectation maximization algorithm

引用

Journal of Computational and Theoretical Nanoscience 2016年第6期13卷 3799-3803页

作者： Chen, Zhihua Zhao, Yang Wang, Zhuo Kou, Zheng Li, Hanggao Key Lab. of Image Processing and Intelligent Control Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan Hubei430074 China Institute of Biomedical and Pharmaceutical Sciences College of Biological Engineering and Food Science Hubei University of Technology Wuhan Hubei430068 China College of Computer Science South-Central University for Nationalities Wuhan Hubei430074 China

The difference of protein sequence or protein structure can be used for the construction of molecular evolutionary tree or phytogenetic tree with certain hierarchy and topology. The divergent points in the tree suggest that new genes appeared or common ancestors varied. The lengths of the branch in the tree show the evolution distances between proteins when divergences happened. The analysis of protein evolution can propose some methods for molecular evolution of various species and can confirm the accurate status in the evolution history. Moreover, the molecular evolution tree of proteins is a strong evidence for species classification. In the paper, the trees are constructed by the regular express of protein sequences and the expectation maximization (EM) algorithm. The proposed method in the paper can be used conveniently and can give reliable results, which benefit the biology computing and sequence analysis. Copyright © 2016 American Scientific Publishers. All rights reserved.

关键词： Proteins

来源：评论

学校读者我要写书评

暂无评论

InSAR phase noise filter in frequency domain

InSAR phase noise filter in frequency domain

引用

IET International Radar Conference 2015

作者： Suo, Zhiyong Li, Ming Zhang, Qingjun Zhang, Jinqiang Fang, Chao National Lab. of Radar Signal Processing Xidian Univ Xi'an710071 China Beijing Aerospace Automatic Control Institute Beijing100854 China China Academy of Space Technology Beijing100094 China

ISBN: (纸本)9781849199940

In this paper, we propose an improved InSAR phase filter in frequency domain based on the Goldstein filter. Firstly, we use different window size determined by the coherence to suppress phase noise. Secondly, we use fringe frequencies compensation to eliminate the effect of the terrain topography. Thirdly, we excute the phase filtering procedure pixel by pixel with a new filtering parameter. Another obvious difference is that we use the Fourier transformation of a small window to deal with the power spectrum of InSAR phase patches. The effectiveness of the improved InSAR phase noise filtering method is investigated by both simulated and real data sets.

关键词： Phase noise

来源：评论

学校读者我要写书评

暂无评论

Degree of freedom evaluation in the radiation field for metamaterial aperture imaging radar

引用

Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University 2016年第6期43卷 39-44页

作者： Wu, Zhenhua Liu, Hongwei Zhang, Lei Kou, Na National Key Lab. of Radar Signal Processing Xidian Univ. Xi'an710071 China Collaborative Innovation Center of Information Sensing and Understanding Xidian Univ. Xi'an710071 China Science and Technology on Antennas and Microwave Lab. Xidian Univ. Xi'an710071 China

There has no complete evaluation system to measure the radiation field of metamaterial imaging radar currently. This paper presents a method of using the first and second cross-correlation statistics of the measurement matrix to assess the degree of freedom of the radiation field, and the reconstruction performance of metamaterial imaging radar is analyzed based on the method. The inaccuracy caused by using only the mean value of measurement matrix cross-correlation is analyzed first. Then the cross-correlation coefficient variance indicator is introduced to develop a new evaluation system. Finally, combined with the compressed sensing theory, the corresponding relationship between imaging reconstruction precision and the two indicators is established through the phase diagram. Simulation results show that our method effectively evaluates the degree of freedom of the radiation field and guides the design of metamaterial imaging radar. © 2016, The Editorial Board of Journal of Xidian University. All right reserved.

关键词： Radar imaging

来源：评论

学校读者我要写书评

暂无评论

Sensing matrix optimization for compressed sensing with consideration of sparse representation error and rank constraint

Sensing matrix optimization for compressed sensing with cons...

引用

IEEE International Conference on Cyber technology in Automation, Control, and Intelligent Systems

作者： Xiao Li Jiahui Ye Gang Li Xiongxiong He Huang Bai Zhejiang Key Lab. for Signal Processing College of Information Engineering Zhejiang University of Technology China

This paper deals with designing sensing matrix for a compressive sensing (CS) system with sparse representation error and rank constraint taken into account. Unlike the traditional design methods, the newly proposed measure takes the sparse representation error into account and hence is expected to lead to a more robust CS system. An alternative minimization based algorithm is derived for solving the optimal sensing matrix design without rank constraint. The rank constraint is then considered with a penalty term added in the proposed measure. A closed-form solution is derived for finding the optimal sensing matrix. Experiments are carried out and simulations show that the sensing matrix obtained by the proposed approach improves the signal recovery accuracy of the CS system greatly and outperforms those by existing algorithms when the sparse representation error is very high.

关键词： Sensors Sparse matrices Coherence Dictionaries Optimized production technology Minimization Algorithm design and analysis

来源：评论

学校读者我要写书评

暂无评论

Heart Rate Monitoring During Physical Exercise Using Wrist-Type Photoplethysmographic (PPG) signals

Heart Rate Monitoring During Physical Exercise Using Wrist-T...

引用

Annual International Conference of the IEEE Engineering in Medicine and Biology Society

作者： Amirhosein Khas Ahmadi Parsa Moradi Mahan Malihi Sajjad Karimi Mohammad B. Shamsollahi Shamsollahi Biomedical Signal and Image Processing Lab. (BiSIPL) Department of Electrical Engineering Sharif University of Technology Tehran Iran Biomedical Signal and Image Processing Lab. (BiSIPL) Department of Electrical Engineering Sharif University of Technology Tehran Iran

ISBN: (纸本)9781424492695

Heart rate monitoring using wrist-type using photoplethysmographic (PPG) signals during subjects' intensive exercises is a challenging problem, since signals are strongly affected by motion artifacts caused by unexpected movements. This paper presents a method that uses both time and frequency characteristics of signals;using sparse signal reconstruction for high-resolution spectrum estimation. Experimental results on type data sets recorded from 12 subjects during fast running at peak speed of 15 km/hour. The results have a performance with the average absolute error being 1.80 beat per minute.

关键词： Photoplethysmographic (PPG) Sparse signal Reconstruction Regression Heart rate

来源：评论

学校读者我要写书评

暂无评论

Improving 2D Block Method in Electrical Impedance Tomography

Improving 2D Block Method in Electrical Impedance Tomography

引用

Iranian Conference on Biomedical Engineering

作者： Saeed Zaravi Rassoul Amirfattahi Bijan Vosoughi Vahdat Ali Hassanipour Digital Signal Processing Research Lab. Department of Electrical and Computer Engineering Isfahan University of Technology Electrical Engineering Department Sharif University of Technology Department of Electrical and Computer Engineering Isfahan University of Technology

ISBN: (纸本)9781467393522

Block method (BM) is a simple and fast method to solve inverse and forward problems in Electrical Impedance Tomography (EIT). In BM, at first tissue is modeled by some blocks and it is assumed that each block has a specific conductivity. Then a medical image is constructed by calculation of its conductivity. Recently, a non-iterative linear inverse solution is presented for block method which we name 2D BM. In this paper, an efficient algorithm with new formulation is proposed to improve the 2D BM, and then several examples have been investigated to examine the proposed method Results show that suggested algorithm achieves better outcomes in all situations, although its run time is increased respect to 2D BM.

关键词： Electrical Impedance Tomography (EIT) 2D block method Forward Problem Inverse Problem

来源：评论

学校读者我要写书评

暂无评论

Moving Target Detection in the Robot System Based on Omni-Vision and Laser Rangefinder

Moving Target Detection in the Robot System Based on Omni-Vi...

引用

International Congress on Image and signal processing

作者： Yan-Rong Hou Intelligent Information Processing Lab. Department of Computer Science and Technology Yanbian University

ISBN: (纸本)9781467390996

The moving target detection is now a hot issue in the field of mobile robot. Firstly, the moving object data was received by using Omni-Vision and Laser Rangefinder sensors. Secondly, the data obtained from a single sensor was analyzed, and the moving target was discovered. Finally, the multi-sensor moving object data was effectively integrated by making use of information fusion method, So the moving target position was located quickly and accurately in three space. Experiments were done in the AS-R mobile robot, Experimental results show that the method can accurately detect real-time moving object.

关键词： Mobile robot Omni-Vision Laser Rangefinder Moving target Robot System Mobile robots laser range finders Object detection moving target detection Moving

来源：评论

学校读者我要写书评

暂无评论

Massive Uncoordinated Multiway Relay Networks with Simultaneous Detections

Massive Uncoordinated Multiway Relay Networks with Simultane...

引用

International Conference on Communication Workshop

作者： Mohammad Nur Hasan Khoirul Anwar Information Theory and Signal processing Lab. Japan Advanced Institute of Science and Technology (JAIST) Nomi Ishikawa JAPAN

In this paper, we consider multiway relay networks with massive number of users. In this situation a fixed transmission scheduling is difficult to apply. We propose uncoordinated communications using the concept of coded slotted ALOHA (CSA), where simultaneous transmitted signals are detected using iterative demapping (IDM) algorithm to improve the success rate probability. We allow each user to transmit the information via any random time slots (during the contention period) to the network. We show the bound of the proposed system and confirm an achievable point using practical coding. We also evaluate the bit-error-rate (BER) performance of the proposed technique via computer simulations. The results indicate that even though with the offered traffic of 1.11 packets/slot, reliable communications is achievable. It is also validated that the proposed system works very well even in relatively low signal-to-noise ratio (SNR) environments. Moreover, the packet-loss-rate (PLR) evaluation shows that the proposed technique outperforms the conventional CSA without simultaneous detection algorithm.

关键词： ALOHA CSA BER

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：