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利用独立分量分析的运动模糊图像检索

计算机工程与应用 2010年第10期46卷 147-149页

作者：相林崔荣一延边大学计算机科学与技术学院智能信息处理研究室吉林延吉133002 淮阴工学院计算科学系江苏淮安223001

研究了独立分量分析(ICA)算法在运动模糊图像检索中的应用。首先,对图片库中的图像进行ICA处理,构造由相互独立的基向量构成的子空间,将图片库中的图像及运动模糊图像分别向该空间投影,获得各自的特征。其次,利用特征向量间的余弦距离... 详细信息

研究了独立分量分析(ICA)算法在运动模糊图像检索中的应用。首先,对图片库中的图像进行ICA处理,构造由相互独立的基向量构成的子空间,将图片库中的图像及运动模糊图像分别向该空间投影,获得各自的特征。其次,利用特征向量间的余弦距离作为相似度度量标准,根据最近邻准则进行特征匹配与图像检索。最后,对人为加入高斯噪声、进行45°和90°旋转的运动模糊以及缺损图像进行了匹配检索实验。实验结果表明,利用ICA算法提取出的特征可以准确地检索出运动模糊图像的原图像,并且对噪声污染、旋转变换和图像缺损具有良好的鲁棒性。

关键词：独立分量分析运动模糊图像图像检索特征提取

Adaptive ILC for a Discrete-time Nonlinear System with both Parametric and Non-parametric Uncertainties

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Adaptive ILC for a Discrete-time Nonlinear System with both ...

2009中国控制与决策会议

作者： Ronghu Chi~1,Zhongsheng Hou~2 1.institute of Autonomous Navigation & intelligent Control,School of Automation & Electrical Engineering, Qingdao university of Science & Technology,Qingdao 266042,china 2.Advanced Control Systems lab,School of Electronics and information Engineering, Beijing Jiaotong university,Beijing 100044,PRC

＜正＞In this paper,a discrete adaptive ILC is presented for a time-varying nonlinear system with both parametric and nonparametric uncertainties.A novel estimation of parametric and nonparametric uncertainties is constructed just using the past input and output data,and the uncertainties are completely compensated such that the output tracking error is only affected by external *** a main contribution of this paper,all the discussions are based on the random initial condition and the iteration-varying target *** the nonlinear function is generalized Lipschitz continuous and the external disturbance is iteration-varying within a bound,the robust property of the proposed adaptive ILC is *** when the nonlinear function is standard Lipschitz continuous and the system is free of external disturbance（or the external disturbance is strictly repeatable）,the proposed scheme guarantees an almost perfect tracking over the finite time interval.

关键词： Adaptive control Iterative learning control Parametric uncertainty Nonparametric uncertainty Random initial conditions Iteration-varying target trajectories

Delay-dependent Robust H∞ Control for Switched Systems with Parameter Uncertainties and Time Delay

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Delay-dependent Robust H∞ Control for Switched Systems with...

第五届全球智能控制与自动化大会会议

作者： Jia Shi(?) Tiejun Wu institute of intelligent Systems and Decision Making Zhejiang university Hangzhou,310027,china Shuxin Du National Key lab for Industrial Control Technology Zhejiang university Hangzhou,310027,china

A delay-dependent sufficient condition for theexistence of a robust Hswitched controller with state delayfeedback for linear switched systems with parameteruncertainties and time delay was derived and formulated innonlinear matrix inequalities solvable by an iterative *** with the conventional memoryless state-feedbackcontroller,the proposed controller can achieve better robustcontrol performance since the delayed state is utilized asadditional feedback information and the parameters of theproposed controllers are changed synchronously with thedynamical characteristic of the *** design method wasalso extended to the case where only delayed state is available forthe *** example of balancing an inverted pendulumon a cart demonstrates the effectiveness and applicability of theproposed design methods.

关键词： Switched Systems Robust H∞ Control Matrix Inequality Time Delay

Structure, spin reorientation and Mssbauer effect studies of Tb0.3Dy0.7(Fe1-xAlx)1.95 alloys

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Science china(Physics,Mechanics & Astronomy) 2006年第2期Mechanics & Astronomy) .卷 149-157页

作者： ZHENG Xiaoping1,2,4, ZHANG Peifeng1,3, FAN Duowang1, LI Fashen3 & HAO Yuan41. Key laboratory of Opto-Electronic Technology and intelligent Control, Ministry of Education, Lanzhou Jiaotong university, Lanzhou 730070, china 2. institute of Electronic information Science and Technology,Lanzhou Teachers College, Lanzhou 730070, china 3. Key laboratory for Magnetism and Magnetic Materials, Ministry of Education, Lanzhou university, Lan-zhou 730000, china 4. State Key lab. of Advanced Non-Ferrous Materials, Gansu Province, Lanzhou university of Technology, Lanzhou 730050, china

The effect of Al substitution for Fe on crystal structure, magnetostriction and spontaneous magnetostriction, anisotropy and spin reorientation of a series of polycrys-talline Tb0.3Dy0.7(Fe1?xAlx)1.95 alloys (x = 0, 0.05, 0.1, 0.15, 0.20, 0.25, 0.30, 0.35) at room temperature and 77 K was investigated systematically. It was found that the primary phase of Tb0.3Dy0.7(Fe1?xAlx)1.95 is the MgCu2-type cubic Laves phase structure when x 0.15 at room temperture, but at 77 K the alloys still remain magnetic phase even for x = 0.2. At room temperature and 77 K, the hyperfine field de-creases and the isomer shifts increase with Al concentration increasing.

关键词： magnetostriction cubic Laves phase spin reorientation M?ssbauer.

Current Loop High Performance Compensation Control Strategy Analysis of Active Power Filter

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Current Loop High Performance Compensation Control Strategy ...

2010 The 3rd International Conference on Power Electronics and intelligent Transportation System (PEITS 2010)

作者： Qianqian Yuan institute of information and Control Engineering Weifang university Weifang,Shandong Province,china

By particular theoretical analyzing on detection error of the traditional current loop proportion-integral(PI) controller,this paper points out the limitations of detection harmonic current at load side and proposes a current feedforward compensation *** can track harmonic instructions with zero static error and good compensation ***,it overcomes the deficiencies of traditional load side detection harmonic current PI controller,with the traditional controller's *** if the load harmonic current is higher than the capacity of active power filter,it can basically maintain zero static error output and has certain theoretical significance and engineering *** analysis and simulation prove the new control strategy's correctness and effectiveness.

关键词： power supply side current feedforward controller.Detection error.Harmonic detection.Current compensation

高速气流冲击法制备BN包覆TiB_2复合粉末

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武汉理工大学学报 2004年第8期26卷 1-3,34页

作者：周婷婷冯彩梅深圳信息职业技术学院计算机应用系深圳518029 武汉理工大学材料复合新技术国家重点实验室武汉430070

采用高速气流冲击式粉体表面改性装置 Hybridization制备了 BN包覆 Ti B2 复合粉末 ,对包覆工艺参数进行了分析并得出了较适宜的包覆条件。用 JSM- 5 6 10 L V型扫描电子显微镜和 H- 6 0 0 STEM/ EDS型透射电子显微镜对包覆体的显微结... 详细信息

采用高速气流冲击式粉体表面改性装置 Hybridization制备了 BN包覆 Ti B2 复合粉末 ,对包覆工艺参数进行了分析并得出了较适宜的包覆条件。用 JSM- 5 6 10 L V型扫描电子显微镜和 H- 6 0 0 STEM/ EDS型透射电子显微镜对包覆体的显微结构进行研究。结果表明 ,包覆时间、转速、Ti B2 与 BN的粒径比、原料预处理等均对包覆效果有显著影响 ;经球形化处理的 Ti B2 粉末与 BN预混合后再进行包覆处理 ,可以得到表面光滑、包覆致密、球形化效果显著的复合粉末。

关键词：高速气流冲击法包覆 TiB2/BN复合粉末

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多分类器融合的人脸识别与身份认证

系统仿真学报 2004年第8期16卷 1849-1853页

作者：董火明高隽汪荣贵合肥工业大学计算机与信息学院图像信息处理研究室合肥230009 中国科学院合肥智能机械研究所合肥230031

人脸识别是生物特征识别技术中一个活跃的研究领域,取得了很多实践成果,但是单一分类器一般不能取得满意的识别率与身份认证效果。本文采用贝叶斯决策理论分析了常见的积、和、中值以及投票多分类器融合方法,并根据实际的选举情形,对投... 详细信息

人脸识别是生物特征识别技术中一个活跃的研究领域,取得了很多实践成果,但是单一分类器一般不能取得满意的识别率与身份认证效果。本文采用贝叶斯决策理论分析了常见的积、和、中值以及投票多分类器融合方法,并根据实际的选举情形,对投票法进行了2种改进。然后对协同人脸识别、特征脸法以及复合方法等人脸识别分类器进行决策层的融合,对ORL库中人脸识别仿真实验表明文中的多分类器融合的人脸识别方法具有较好的分类性能,对污损、低分辨率人脸图像具有可靠的识别率、鲁棒性强,而且应用于人脸身份认证中取得了较好的认证效果。

关键词：人脸识别多分类器融合身份认证协同识别特征脸法

一个基于多方秘密共享的代理加密转换信息传送方案

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通信学报 2003年第4期24卷 133-138页

作者：赵福祥赵红云王育民杨世平西安电子科技大学ISN国家重点实验室西安通信学院陕西西安710106 深圳市中兴通讯股份有限公司技术中心研究部广东深圳518004 西安通信学院

在公开的网络中采用匿名连接,使攻击者既窃听不到机密也实施不了流量分析。但现有方案中,使用重复加密和签名同一消息包的方法传送信息必然使系统效率降低;其次,使用常规公钥密码方法仍可使攻击者通过验证密钥等分析原发节点位置。而采... 详细信息

在公开的网络中采用匿名连接,使攻击者既窃听不到机密也实施不了流量分析。但现有方案中,使用重复加密和签名同一消息包的方法传送信息必然使系统效率降低;其次,使用常规公钥密码方法仍可使攻击者通过验证密钥等分析原发节点位置。而采用代理加密转换方法时,其中间节点不用解密就可把密文消息转换成后续节点可接受的密文消息,从而取得更高的隐蔽程度。因此,本文应用多方门限代理加密转换技术,提出了信息传送的新方案并分析了其安全性。

关键词：网络安全信息隐藏匿名路由代理加密转换门限加密转换秘密共享

The Research on Policy-management-based Dynamic Spectrum Access Technology for Cognitive Network

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The Research on Policy-management-based Dynamic Spectrum Acc...

2009 ISECS International Colloquium on Computing, Communication, Control, and Management

作者： Lu Chuntao,Zhang Huyin,Wu Di School of Computer Wuhan university Wuhan,china An Hui institute for information Industry china Center for information Industry Development Beijing,china

Nowadays,it is a very popular topic to improve the performance of cognitive *** aim to provide a solution for cognitive network,through the policy-based performance management system which we are *** this paper,we proposes the policy-based dynamic spectrum access management system framework at first,and the distributed policy repository to provide *** also, there would be a part to present our design about some new strategies for the policy repository,that with the technology features of cognitive network for dynamic spectrum access,a cognitive network can detect the use of local channel and real-time status to respond automatically to avoid interrupts.

关键词： Policy Cognitive network Dynamic spectrum access