检索结果-内蒙古大学图书馆

Whole-proteome based phylogenetic tree construction with inter-amino-acid distances and the conditional geometric distribution profiles

引用

Molecular phylogenetics and evolution 2015年 89卷 37-45页

作者： Xian-Hua Xie Zu-Guo Yu Guo-Sheng Han Wei-Feng Yang Vo Anh Hunan Key Laboratory for Computation and Simulation in Science and Engineering Key Laboratory of Intelligent Computing and Information Processing of Ministry of Education Xiangtan University Hunan 411105 PR China School of Mathematics and Computer Science Gannan Normal University Jiangxi 341000 PR China. Electronic address: xxianhua@***. School of Mathematical Sciences Queensland University of Technology GPO Box 2434 Brisbane QLD 4001 Australia. Electronic address: yuzuguo@***. Hunan Key Laboratory for Computation and Simulation in Science and Engineering Key Laboratory of Intelligent Computing and Information Processing of Ministry of Education Xiangtan University Hunan 411105 PR China. Electronic address: korea10282003@***. Hunan Key Laboratory for Computation and Simulation in Science and Engineering Key Laboratory of Intelligent Computing and Information Processing of Ministry of Education Xiangtan University Hunan 411105 PR China. Electronic address: yangweifeng09@***. School of Mathematical Sciences Queensland University of Technology GPO Box 2434 Brisbane QLD 4001 Australia. Electronic address: v.anh@qut.edu.au.

There has been a growing interest in alignment-free methods for whole genome comparison and phylogenomic studies. In this study, we propose an alignment-free method for phylogenetic tree construction using whole-proteome sequences. Based on the inter-amino-acid distances, we first convert the whole-proteome sequences into inter-amino-acid distance vectors, which are called observed inter-amino-acid distance profiles. Then, we propose to use conditional geometric distribution profiles (the distributions of sequences where the amino acids are placed randomly and independently) as the reference distribution profiles. Last the relative deviation between the observed and reference distribution profiles is used to define a simple metric that reflects the phylogenetic relationships between whole-proteome sequences of different organisms. We name our method inter-amino-acid distances and conditional geometric distribution profiles (IAGDP). We evaluate our method on two data sets: the benchmark dataset including 29 genomes used in previous published papers, and another one including 67 mammal genomes. Our results demonstrate that the new method is useful and efficient.

关键词： Alignment-free whole-proteome comparison Conditional geometric distribution profile Inter-amino-acid distances Phylogenetic tree

来源：评论

学校读者我要写书评

暂无评论

Color PNG Image Authentication Scheme Based on Rehashing and Secret Sharing Method

引用

Journal of Information Hiding and Multimedia signal processing 2015年第3期6卷 523-533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 TechnologyAnhui University Hefei230039 China Department of Information Engineering and Computer Science Feng Chia University 100 Wenhwa Rd Seatwen Taichung40724 Taiwan Department of Mathematics and Physics Fujian University of Technology Fuzhou Fujian350108 China

An authentication scheme that uses rehashing and secret sharing methods to verify the reality of a color image’s content is proposed in this paper. First, the proposed scheme uses Shamir’s secret sharing method to share image features. Second, the proposed scheme innovatively utilizes the rehashing method to overcome easy collisions of the random numbers to enhance the effectiveness against attacks. Third, the proposed method utilizes Portable Network Graphics images to hide authentication messages. Using the rehashing method, the collisions take up little in address space, making the process suitable for processing authentication messages. The experimental results indicated that the proposed scheme had very low false acceptance and rejection ratios and verified that the rehashing method can be used in image authentication applications. © 2009 ISSN 2073-4212.

关键词： Authentication

来源：评论

学校读者我要写书评

暂无评论

An improved performance metric for multiobjective evolutionary algorithms with user preferences

An improved performance metric for multiobjective evolutiona...

引用

Congress on Evolutionary Computation

作者： Guo Yu Jinhua Zheng Xiaodong Li School of Information Engineering Xiangtan University Hunan China School of Information Engineering Key Laboratory of Intelligent Computing Information Processing of Ministry of Education Hunan China School of Computer Science and IT RMIT University Melbourne Australia

ISBN: (纸本)9781479974931

This paper proposes an improved performance metric for multiobjective evolutionary algorithms with user preferences. This metric uses the idea of decomposition to transform the preference information into m+1 points on a constructed preference-based hyperplane, then calculates the Euclidean distances and the angles between the obtained solutions by algorithms and those obtained m+1 points, respectively. By means of these distances and angles, the proposed metric can evaluate effectively both the convergence and diversity of the obtained solution set, with consideration of the preference information. This makes easier and allows meaningful comparisons between different multiobjective evolutionary algorithms using preference information.

关键词： Measurement

来源：评论

学校读者我要写书评

暂无评论

Unscented Kalman consensus filters based on Rauch-Tung-Striebel Smoother

引用

Journal of Computational Information Systems 2014年第10期10卷 4159-4167页

作者： Zou, Juan Pei, Tingrui Zhou, Yan Long, Jiachuan College of Information Engineering Xiangtan University Xiangtan 411105 China Key Laboratory of Intelligent Computing and Information Processing of Ministry of Education Xiangtan University Xiangtan 411105 China

One of the fundamental problems in sensor networks is the target's state estimation. The Unscented Kalman consensus filter (C-UKF) makes use of the consensus protocol and applies it to an optimal filter of nonlinear state-space models. It does this in order to acquire a consensus of n sensor Kalman filters' measurements, but the estimates of C-UKF are dispersed for a relatively long period. In this study, a new Unscented Kalman consensus filter based on Rauch-Tung-Striebel Smoother (C-URTS) is proposed. This new algorithm and Unscented Kalman consensus filter (C-UKF) differ in their reliance on a traditional Unscented Kalman filter. Unscented Kalman consensus filters are used to apply state estimates for the initial smooth value of URTS. The C-URTS uses a neighbor's information to reach a consensus, and then runs a backward smoother with the obtained Kalman consensus filters' value for better accuracy. Simulation results are provided to demonstrate the effectiveness of C-URTS in sensor networks. 1553-9105/Copyright © 2014 Binary Information Press.

关键词： Sensor networks

来源：评论

学校读者我要写书评

暂无评论

Multi-objective Kinetic-molecular Theory Optimization Algorithm With Application to Automatic Demand Response

Multi-objective Kinetic-molecular Theory Optimization Algori...

引用

International Conference on Electric Utility Deregulation and Restructuring and Power Technologies

作者： Lingzhi Yi Shengbing Li Chaodong Fan Yahui Wang Key Laboratory of Intelligent Computing & Information Processing Ministry of Education (Xiangtan University) Xiangtan China

ISBN: (纸本)9781467371070

intelligent household as an extension of smart grid in the user side highly integrates loads management and control. Home energy management system (HEMS) with automatic demand response (ADR) is a key part of intelligent household, which is able to fit their electricity demand without changing the residents' habits too much. Furthermore HEMS schedule their power consumption to save energy, reduce emission, shift peak load and reduce the financial burden. The characteristics of various electrical devices were analyzed in this paper, and a mathematical model of ADR was established. Multi-objective kinetic-molecular theory optimization algorithm was used to optimize the solution of the ADR model. Implementation results showed that the KMTOA was more accurate and reliable than other algorithms for the complexities of model and data size considered in this study. Compared with some similar algorithms, the multi-objective kinetic-molecular theory optimization algorithm shows more advantages.

关键词： home energy management system peak load shifting automatic demand response multi-objective kinetic-molecular theory optimization algorithm

来源：评论

学校读者我要写书评

暂无评论

Hybrid color image steganography method used for copyright protection and content authentication

引用

Journal of Information Hiding and Multimedia signal processing 2015年第4期6卷 686-696页

作者： Lyu, Wan-Li Chang, Chin-Chen Chou, Yeh-Chieh Lin, Chia-Chen 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 Management Providence University Taichung43301 Taiwan

In this paper, we proposed a hybrid image data hiding method used for watermarking applications in order to make sure the hidden dual watermarks survive after the image manipulation and enhancement processes. To achieve this goal, the proposed method is divided into two phases. In the first phase, the YCbCr color space is exploited, and, then, LSB techniques are used to embed the first level watermark bits in the YCbCr channel. In the second phase, the modification direction method is used to embed the second level watermark bits in the RGB channel. The experimental results confirmed that the proposed method resists most geometric attacks more effectively than Lusson et al.'s method. Therefore, the method is suitable for protecting the ownership of images and integrity of the potential tampered images. © 2015 ISSN.

关键词： Steganography

来源：评论

学校读者我要写书评

暂无评论

Congestion control strategy based on probability selection in delay tolerant mobile sensor network

引用

Journal of Information and Computational Science 2014年第14期11卷 5121-5130页

作者： Wang, Bingting Hu, Yanjun Liang, Hui Lin, Qibin Shi, Yonghua Wang, Xianbing School of Electronic and Electrical Engineering Chuzhou University Chuzhou China Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University Hefei China School of Information Science & Technology Southwest Jiaotong University Chengdu China

We analyzed the relationship between packet validity and encounter probability as well as the relationship between packet validity and remaining lifetime. Then we proposed the congestion control strategy based on probability selection, which implements the operations of congestion detection and congestion avoidance. When node buffer is fully occupied and needs to store a new packet, it will look for the packets whose remaining lifetime is lower than the threshold T, and then drop the packet with minimum encounter probability. If there is no packet whose remaining lifetime is lower than T, the packet with the shortest remaining lifetime will be dropped. Simulation results show that this congestion control strategy improves the performances of delivery probability, average delay and overhead ratio compared with four kinds of congestion control strategies. 1548-7741/Copyright © 2014 Binary Information Press

关键词： Probability

来源：评论

学校读者我要写书评

暂无评论

Circular spot detection and segmentation with rotating line local binary analysis

Circular spot detection and segmentation with rotating line ...

引用

作者： Zhang, Dongbo Liu, Xia College of Information Engineering Xiangtan University China Key Laboratory of Intelligent Computing and Information Processing Ministry of Education China

ISBN: (纸本)9781479957514

The circular spots appear as round local peaks/valleys in image space, and they reflect omnidirectional symmetry and Gaussian distribution characteristics. According to these observations, a novel rotating line scan operator is proposed to achieve feature analysis of the spot object. Experimental tests show that the proposed algorithm is robust to spots' appearance variation (size, local contrast and intensity). The method presents promising performance in various real images. © 2014 IEEE.

关键词： Circular spot detection local binary analysis rotating line

来源：评论

学校读者我要写书评

暂无评论

Robust Spatial Filters on Three-Class Motor Imagery EEG Data Using Independent Component Analysis

引用

Journal of Biosciences and Medicines 2014年第2期2卷 43-49页

作者： Bangyan Zhou Xiaopei Wu Lei Zhang Zhao Lv Xiaojing Guo The Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University Hefei China

Independent Component Analysis (ICA) was often used to separate movement related independent components (MRICs) from Electroencephalogram (EEG) data.?However, to obtain robust spatial filters, complex characteristic features, which were manually selected in most cases, have been commonly used. This study proposed a new simple algorithm to extract MRICs automatically, which just utilized the spatial distribution pattern of ICs. The main goal of this study was to show the relationship between spatial filters performance and designing samples. The EEG data which contain?mixed brain states (preparing, motor imagery and rest) were used to design spatial filters. Meanwhile, the single class data was also used to calculate spatial filters to assess whether the MRICs extracted on different class motor imagery spatial filters are similar. Furthermore, the spatial filters constructed on one subject’s EEG data were applied to extract the others’ MRICs. Finally, the different spatial filters were then applied to single-trial EEG to extract MRICs, and Support Vector Machine (SVM) classifiers were used to discriminate left hand、right-hand and foot imagery movements of BCI Competition IV Dataset 2a, which recorded four motor imagery data of nine subjects. The results suggested that any segment of finite motor imagery EEG samples could be used to design ICA spatial filters, and the extracted MRICs are consistent if the position of electrodes are the same, which confirmed the robustness and practicality of ICA used in the motor imagery Brain Computer Interfaces (MI-BCI) systems.

关键词： ICA Spatial Filter Motor Imagery BCI SVM

来源：评论

学校读者我要写书评

暂无评论

Substrate integrated waveguide filter with improved stopband performance using LTCC technology

引用

Progress In Electromagnetics Research C 2014年 54卷 155-162页

作者： Zhang, Ping-Juan Li, Min-Quan College of Mathematics Physics and Information Engineering Anhui Science and Technology University Chuzhou233100 China Key Laboratory of Intelligent Computation and Signal Processing Ministry of Education Anhui University Hefei230039 China

A novel multi-layer third-order substrate integrated waveguide (SIW) bandpass filter with improved lower stopband performance is proposed. TE201-mode in folded-SIW cavity is utilized to implement negative cross coupling, and the TE101-mode is taken as a non-resonating node (NRN) for implementing bypass coupling. A circular aperture etched on the middle metal layer is used to realize coupling between source and the second SIW cavity. Then, three transmission zeros located below the passband can be obtained to improve stopband attenuation. Meanwhile, better spurious suppression performance above passband is achieved. A filter sample is designed and fabricated with multi-layer low-temperature co-fired ceramic (LTCC) technology. The measured S-parameters agree well with the simulated ones, with its predicted good performance. © 2014 Electromagnetics Academy. All rights reserved.

关键词： Substrate integrated waveguides

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：