检索结果-内蒙古大学图书馆

International Conference on Information Science and Technology (ICIST)

作者： Hua-Bin Wang Liang Tao Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University Hefei Anhui China

Based on adaptive filtering and retinex method, this paper presents a novel algorithm for Enhancement of hand vein images. First of all, the principle of the near-infrared hand vein image acquisition is introduced. Secondly, the retinex method is used to normalize hand vein images, and the adaptive smoothing method is selected to estimate the illumination. Thirdly, Gray cosine transform is used to enhance the discrimination of the skin and the vein in hand vein images. Finally, a determination criterion of hand vein is established to remove the false vein blocks from the segmented hand vein images. We developed a hand vein recognition system in Microsoft VC6.0 and the experimental results demonstrate the high efficiency of the proposed algorithm in runtime and correct recognition rate.

关键词： Veins Image segmentation Smoothing methods Lighting Skin Histograms Adaptive filters

来源：评论

学校读者我要写书评

暂无评论

A full-rate wireless cooperative relay transmission scheme with low detection complexity

引用

Journal of Computational Information Systems 2012年第13期8卷 5279-5285页

作者： Zhang, Hongwei Liu, Yanru Zhang, Ye Li, Xiaohui Key Lab. of Intelligent Computing and Signal Processing of Ministry of Education Anhui University Hefei 230039 China

To achieve low detection complexity and full-rate wireless cooperative transmissions, pre-coding and cyclic delay diversity (CDD) techniques are fully considered and properly combined for a two-path successive relay network with multiple relay nodes in this paper. Firstly, the symbols to be transmitted at source node are encoded with linear complex field coding methods, and then these coded symbols are divided into two data streams. Both streams are transmitted to two groups of relay nodes respectively during two consecutive time slots. After having been amplified and forwarded by relay nodes using CDD ways, all transmit signals are received by the destination node finally. At receiver, only two symbols are needed to be jointly detected in each transmission process, the complexity is low. Simulation results show that the proposed scheme can achieve full-rate cooperative relay transmissions and obtain high diversity gains of the distributed wireless systems. © 2011 by Binary Information Press.

关键词： Orthogonal frequency division multiplexing

来源：评论

学校读者我要写书评

暂无评论

Analysis of electromagnetic characteristics of antenna arrays based on the characteristic basis function method

Analysis of electromagnetic characteristics of antenna array...

引用

International Symposium on Antennas Propagation and EM Theory

作者： Meng Wu Yufa Sun Guohua Wang Key Lab. of Intelligent Computing & Signal Processing Ministry of Education Anhui University

ISBN: (纸本)9781467317993

The characteristic basis function method (CBFM) is used to analyze the electromagnetic characteristics of antenna arrays in this paper. The original antenna arrays are divided into a number of subdomains and high-level basis functions are constructed for each subdomain through their couplings, the resulting matrix can be largely reduced. The characteristic basis function method not only has high accuracy and computing time is greatly reduced. The numerical results are given to illustrate that the method is accurate and efficient.

关键词： Characteristic basis function method Method of Moments Antenna arrays

来源：评论

学校读者我要写书评

暂无评论

Fast calculation of bistatic RCS for conducting objects using the adaptive cross approximation algorithm

Fast calculation of bistatic RCS for conducting objects usin...

引用

International Symposium on Antennas Propagation and EM Theory

作者： Lei Chen Yufa Sun Shuaishuai Yang Key Lab. of Intelligent Computing & Signal Processing Ministry of Education Anhui University

ISBN: (纸本)9781467317993

Adaptive cross approximation (ACA) algorithm as a kind of common matrix compression method is often used to analyze the electromagnetic radiation and scattering problems. In the region of far field, the impedance matrix is compressed by ACA method, and the extracted impedance matrix is accelerated filling by equivalent dipole-moment method (EDM). In the area of near field, the method of moments or the equivalent dipole-moment method is applied for filling the impedance matrix. The iterative near field preconditioning technique is used to solve matrix equation, so that fast calculation of radar cross section (RCS) can be achieved. Numerical results show that the computational efficiency is improved significantly via applying the presented method in this paper without sacrificing much accuracy.

关键词： Adaptive cross approximation algorithm Equivalent dipole-moment method Near field preconditioning Radar cross section

来源：评论

学校读者我要写书评

暂无评论

引用

2012 9th International Conference on Fuzzy Systems and Knowledge Discovery, FSKD 2012

作者： Zhou, Jianlong Xiao, Chun Key Laboratory of Intelligent Computing and Information Processing Xiangtan University Ministry of Education Hunan China Janelia Farm Research Campus Howard Hughes Medical Institute VA United States

ISBN: (纸本)9781467300223

A contour tree is a topological abstraction of a scalar field. Contour tree simplification (CTS) removes branches corresponding to noise, while making the size of the tree small enough for maintaining essential structure of data. This paper proposes a similarity-driven multi-level partial CTS (PCTS) approach. The PCTS preserves branches corresponding to structures of interest or specific objects specified by users, while removing other branches of the contour tree. A clustering method (e.g. k-means clustering) is used to cluster branch nodes into groups based on their similarities (i.e., similar locations) in the attribute space. As a result, the contour tree is simplified with multi-levels based on different clustering groups. Furthermore, various interfaces and rendering windows are provided and synchronized, which makes the simplification process more meaningful and efficient compared with traditional simplification methods using slide-bar based approaches. The proposed approach can be generalized to process branches with more than three measures. © 2012 IEEE.

关键词： Trees (mathematics)

来源：评论

学校读者我要写书评

暂无评论

Compressed sensing based on best wavelet packet basis for image processing

引用

Journal of Computers (Finland) 2013年第8期8卷 1947-1950页

作者： Li, Zhe Tao Xie, Jing Xiong Yu, Zu Guo Tu, Deng Biao Choi, Young June The College of Information Engineering Xiangtan University Hunan 411105 China School of Computer National University of Defense Technology Hunan 410073 China Key Laboratory of Intelligent Computing and Information Processing of Ministry of Education Xiangtan University Hunan 411105 China School of Mathematics and Computational Science Xiangtan University Hunan 411105 China National Computer Network Emergency Response Technical Team/Coordination Center of China Beijing 100029 China Department of Information and Computer Engineering Ajou University Suwon 443749 Korea Republic of

In this paper, an algorithm named best wavelet packet tree decomposition (BWPTD) is proposed for image compression. In order to obtain better sparse representation of image, best wavelet packet basis is introduced to decompose image signal in the algorithm. Experimental results show that BWPTD is better than single layer wavelet decompression (SLWD) and original compressed sensing (OCS) in peak signal to noise ratio (PSNR) by 2db and 8db, respectively. In addition, the reconstruction time of BWPTD is only half as that of SLWD and OCS. © 2013 ACADEMY PUBLISHER.

关键词： Compressed sensing

来源：评论

学校读者我要写书评

暂无评论

The Design of Bottom Layer Sensor Interfaces Based on Android OS

The Design of Bottom Layer Sensor Interfaces Based on Androi...

引用

2012 4th International Conference on signal processing Systems(ICSPS 2012)

作者： Jie Song Key Laboratory of Intelligent Computering and signal Processing Anhui University Ministry of Education

This paper focuses on the research about sensor module driver at bottom layer of popular Android OS. The main structure of Android is decomposed and illuminated, and the sensor system structure is decomposed in detail. The design of driver and Hardware Abstract Layer (HAL) is presented, and the steps, procedure, data structure of development about Sensor interfaces are also presented.

关键词： android, driver, sensor, migration

来源：评论

学校读者我要写书评

暂无评论

Granularity analysis of fuzzy soft set

Granularity analysis of fuzzy soft set

引用

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

作者： Yao, Dengbao Wang, Cuicui Mao, Junjun Zhang, Yanping School of Mathematical Sciences Anhui University Hefei 230039 China Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University Hefei 230039 China Department of Computer Science University of Houston Houston TX 77204-3010 United States

ISBN: (纸本)9783642318993

Fuzzy soft set (FSs) is a novel mathematical tool, in order to describe and measure uncertain information of FSs perfectly, granularity analysis based on covering about FSs is originally discussed in this paper. Firstly, the α-dominance relation between any two objects is built by constructing the possibility degree or the weighted possibility degree after standardization, thus α-dominance class and α-covering approximation space could be generated on this relation. Secondly, granular capacity is proposed to measure the granular information of variable precision through introducing concepts of the description set and the indistinguishability set, Finally, an illustrative example is analysed to reflect dynamic changes of uncertain information under different granular structure. © 2012 Springer-Verlag.

关键词： Set theory

来源：评论

学校读者我要写书评

暂无评论

A Design of Temperature and Humidity Remote Monitoring System Based on Wireless Sensor Network Technology

A Design of Temperature and Humidity Remote Monitoring Syste...

引用

International Conference on Control Engineering and Communication Technology (ICCECT)

作者： Zhiyuan Gao Yingju Jia Hongwei Zhang Xiaohui Li Key Lab of Intelligent Computing and Signal Processing of Ministry of Education Anhui University Hefei China

ISBN: (纸本)9781467344999

In recent years, WSN (Wireless Sensor Network) technology has been developed rapidly, and been widely used in the fields of industry, agriculture, medicine and so on. To solve the low communication rate and short-distance data transmission in the current temperature and humidity monitoring system, this paper designs a temperature and humidity remote monitoring system based on WSN technology. In this system, microprocessor Atmega128L is adopted as the control core of network node, and wireless transceiver module nRF905 is used to realize wireless data transmission. The data of temperature and humidity is sampled by using digital temperature sensor DS18B20 and humidity sensor SHT75 in the system. The proposed network protocol in this paper not only can realize long-rang wireless data transmission, but also can realize self-organizing and manual networking. The results of practical test show that this system has the stable and reliable performance and the advantage of scalability.

关键词： Temperature sensors Wireless sensor networks Humidity Routing Wireless communication Temperature measurement Monitoring

来源：评论

学校读者我要写书评

暂无评论

Secure Cooperative Spectrum Sensing based on the Distance between Bodies of Evidence

引用

International Journal of Communications, Network and System Sciences 2012年第1期5卷 66-71页

作者： Yi Wang Yanjun Hu Xiwen Tang Yingguan Wang Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University Key Laboratory of Wireless Sensor Network & Communication Shanghai Institute of Microsystem and Information Technolgy Chinese Academy of Sciences

In cognitive radio (CR) networks, unlicensed secondary users need to conduct spectrum sensing to gain access to a licensed spectrum band. And cooperation among CR users will solve the problems caused by multipath fading and shadowing. In this paper, we propose a multi-threshold method at local nodes to cope with noises of great uncertainty. Functions of distance between bodies of evidence are used at fusion centre to make synthetic judgment. To guarantee security which is an essential component for basic network functions, we will take selfish nodes into account which try to occupy channels exclusively. The proposed technique has shown better performance than conventional algorithms without increase the system overhead.

关键词： Cognitive Radio Spectrum Sensing Multiple Thresholds Energy Detection Evidence Theory

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：