检索结果-南通市图书馆

Tracking Moving Vehicles Using Particle Filtering and Level Set

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Tracking Moving Vehicles Using Particle Filtering and Level ...

2011 Chinese Control and Decision Conference（CCDC）

作者： Yang Xu is with college of information Science and engineering,Northeastern {3.,Shenyang,china.She is also with School of Software,{3. of Science and technology LiaoNing,AnShan,china.Chengdong Wu is with college of information Science and engineering,Northeastern {3.,Shenyang,china.Xuedong Zhang is with School of {13. and information engineering,{3. of Science and technology LiaoNing,AnShan,china..Ying Zhao is with School of {13. and information engineering,{3. of Science and technology LiaoNing,AnShan,china.

The paper presents a new framework for tracking moving vehicles in image ***,the Gaussian particle filtering algorithm was used to track the objects,and the external rectangle contour could be ***,based on the centroid of the external contour,the level set function without re-initialization is introduced to GAC model,curve evolution was performed to get the precise contour of the objects,and the extract results were fed back to the tracking frame;lastly the likelihood function was improved by updating the reference template *** experiment results show that the proposed method got the better tracking results in tracking moving vehicles for actual traffic environment.

关键词： Gaussian Particle filtering Level set Moving object tracking

Image Denoising Algorithm Based on PSO Optimizing Structuring Element

在线全文

cnki会议

学校读者我要写书评

暂无评论

Image Denoising Algorithm Based on PSO Optimizing Structurin...

第24届中国控制与决策会议

作者： Zhu youlian, Huang cheng college of electronic information {3., Jiangsu Teachers university of technology, Changzhou, china, 213.01

A new image denoising algorithm is proposed to deal with information loss in the conventional morphological image denoising process. The algorithm uses median operation to improve morphological operations’ performance, which called median closing operation. It gives a mathematical model of the structuring element unit （SEU） composed of a zero square matrix. The particle swarm optimization （PSO） algorithm is employed for choosing the size of structuring element. The value of peak signal to noise ratio （PSNR） is taken as a fitness function, and the transformed value of the particle’s position is taken as the size of the structuring element. Experimental results show that the denoising performance of the proposed algorithm has obvious superiority than conventional morphological algorithm. It can overcome the inherent deficiency of conventional morphological operations, adaptively obtain the size of the structuring element, and effectively remove impulse noise from images, especially for the image whose signal to noise ratio value is relatively low. So it has a good prospect in image processing.

关键词： Image Denoising, Morphological Filter, Particle Swarm Optimization (PSO), Structuring Element (SE) Peak Signal-to-noise Ratio (PSNR)

Influence of modulation ratio on structure and properties of nanoscale ZrB_2/ZrAlN multilayered coatings

在线全文

cnki会议

学校读者我要写书评

暂无评论

Science china(Technological Sciences) 2010年第3期53卷 772-775页

作者： LI DeJun 1,KANG YuanBin 1,DONG Lei 1,DENG XiangYun 1,LIU Hao 2 &SUN XueLiang 2 1college of Physics and electronic information Science,Tianjin Normal {3.,Tianjin 3.03.7,china 2 Department of Mechanical&Materials engineering,{3. of Western Ontario,London ON,Canada 1. college of Physics and electronic information Science Tianjin Normal University Tianjin 300387 China2. Department of Mechanical & Materials Engineering University of Western Ontario London ON Canada

ZrB2/ZrAlN multilayered coatings with various modulation ratios(t ZrB2:t ZrAlN)and constant modulation periods were prepared by magnetron sputtering system at room ***,XRD,surface profiler and nano-indenter were employed to investigate the influences of tZ rB 2:tZrAlNon the microstructure and mechanical properties of the *** interfaces and nanoscale multilayered modulation were confirmed by *** multilayer with modulation period of 40 nm and ratio of 3.1 displayed the highest hardness(3..4 GPa)and critical fracture load(76.477 mN)with lower *** polycrystalline structure and multilayered modulate structure were directly responsible for the enhanced mechanical properties.

关键词： ZrB2/ZrAlN multilayered coating magnetron sputtering modulation ratio nanoscale

维普期刊数据库

The multi-scale forecast of submerged arc furnace Energy consumption Base on support vector machine

在线全文

学校读者我要写书评

暂无评论

The multi-scale forecast of submerged arc furnace Energy con...

2010 International Conference on Computer,Mechatronics, Control and electronic engineering (CMCE 2010)

作者： Zhang Niaona college of Electrical and electronic engineering Changchun {3. of technology Changchun china Wang Zijian college of Electrical and electronic engineering Changchun {3. of technology Changchun china Zhang Dejiang college of Electrical and electronic engineering Changchun {3. of technology Changchun china

Due to ferroalloy submerged arc furnace smelting is an extremely complicated chemistry and physics reaction process,the exact forecast of energy consumption related to the stable and efficient operation of submerged arc furnace,introducing a multi-scale energy consumption prediction model based on least squares support vector machine (LS-SVM),first of all,by conducting the wavelet decomposition to the energy consumption sequence;we can get the approximation coefficient and wavelet coefficient according to the specific scale and related ***,we conduct the multi-scale combined forecast by using the coefficient of predictive ***,through the wavelet reconstruction,we can calculate the corresponding predictive value of submerged arc furnace energy *** conduct the simulation test combined with the demand data of submerged arc furnace energy consumption in Sinosteel Jilin Ferroalloys Co.,*** results indicate that the method introduced in this paper has a considerable forecast accuracy and practical value.

关键词： multi-scale forecast LS-SVM submerged arc furnace.

在线全文

cnki会议

学校读者我要写书评

暂无评论

非等间距GM(1,1)模型建模研究

系统工程理论与实践 2005年第9期25卷 89-93页

作者：戴文战李俊峰浙江理工大学自动化系浙江理工大学自动化系浙江杭州3.003. 浙江工商大学信息与电子工程学院浙江杭州3.003. 东华大学机械工程学院上海200051

基于灰色模型的指数特性和积分定义,提出了一种重构非等间距序列的GM(1,1)模型背景值的方法,用该方法重构的背景值更加精确,可以提高GM(1,1)模型的拟合精度和预测精度,进一步拓广GM(1,1)模型的应用范围.

关键词：非等时距模型灰色模型背景值

Dual-turbo receiver architecture for turbo coded MIMO-OFDM systems

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science china(information Sciences) 2012年第2期55卷 384-395页

作者： WANG WenJin1,GAO XiQi1,WU XiaoFu2,YOU XiaoHu1,ZHAO ChunMing1 & WONG Kai-Kit3.1National Communication Research Laboratory,Southeast university,Nanjing 210096,china 2Nanjing Institute of Communications engineering,Nanjing 210007,china 3.epartment of Electrical and electronic engineering,university college London London WC1E 7JE,UK 1. National Communication Research Laboratory Southeast University Nanjing 210096 China2. Nanjing Institute of Communications Engineering Nanjing 210007 China3. Department of Electrical and Electronic Engineering University College London London WC1E 7JE UK

This paper presents a novel architecture of iterative receivers with two layers of iterations for turbo coded multiple-input and multiple-output orthogonal frequency-division multiplexing(MIMO-OFDM)systems,where soft messages are passed not only between the MIMO detector and the turbo decoder,but also between the two component decoders within the turbo *** first derive the factor graph representation of a turbo coded system as a basic building block for developing the iterative ***,a new soft message passing schedule over the factor graph is proposed,resulting in the proposed dual-turbo receiver architecture(DTRA).In DTRA,the MIMO detector and the turbo decoder work concurrently,and the soft messages for both layers of iterations are updated instantaneously,instead of the block-based exchange of soft messages in the conventional iterative *** so doing,the processing latency can be greatly reduced while low computational complexity can be achieved.

关键词： MIMO-OFDM iterative detection and decoding turbo codes

Transmission Delay Based Control over Networks with Wireless Links

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Wuhan university Journal of Natural Sciences 2002年第4期7卷 431-436页

作者： Zhou Zhi zhao, Han Zheng zhi college of electronic and information {3., Shanghai Jiaotong university, Shanghai 20003.,china Shanghai Jiaotong university (china)

To achieve the mobility of computers during communication, the TCP connections between fixed host and mobile host may often traverse wired and wireless networks, and the recovery of losses due to wireless transmission error is much different from congestion control. The paper analyzes the side effect of RTT estimation while making the TCP source to handle congestion and wireless error losses properly. Then present a strategy using information feedback by the last hop acknowledgement and monitoring the queuing level of the wired bottleneck link by calculating the changes in transmission delay along the path. With the identification of the early stage of congestion, it can respond to wired congestion quickly while keeping wireless link more reliable, and make TCP react to the different packets losses more appropriately.

关键词： Key words round trip times retransmission timeout value last hop acknowledgement delay explicit loss nodification

维普期刊数据库

Improved Pruning Algorithm Using Quadratic Renyi Entropy for LS-SVM Modeling

在线全文

学校读者我要写书评

暂无评论

Improved Pruning Algorithm Using Quadratic Renyi Entropy for...

第24届中国控制与决策会议

作者： WANG Peng, YAN Ai-Jun college of electronic information & Control {3., Beijing university of technology, Beijing 100124, china

For the loss of sparseness in least squares support vector machine （LS-SVM） model, a new pruning algorithm using Renyi entropy for LS-SVM modeling is presented. The kernel principal component is adopted for data pre-processing, then the training subsets are divided randomly. To solve the problem that the conventional pruning algorithm cannot take full account the location of the Lagrange multiplier, the concept of quadratic Renyi entropy is introduced as the basis of training and pruning in LS-SVM modeling. The results of simulation verify the validity of the algorithms, thus the sparseness and generalization ability of the model can be improved. The presented algorithm can be applied to multiple-output modeling.

关键词： LS-SVM Sparseness Pruning Quadratic Renyi Entropy

在线全文

cnki会议

学校读者我要写书评

暂无评论

一种混沌图像加密方法的研究

通信学报 2003年第8期24卷 31-36页

作者：吴敏丘水生华南理工大学电信学院广东广州510640

使用高复杂度的超混沌信号,以增强载波信号的随机性以及不可预测性。本文将无线保密通信技术应用于基于INTERNET的混沌保密通信之中,并在此基础上提出了一种超混沌掩盖一混沌加密方法,其中采用了非线性“扰频”技术。仿真结果显示:密文... 详细信息

使用高复杂度的超混沌信号,以增强载波信号的随机性以及不可预测性。本文将无线保密通信技术应用于基于INTERNET的混沌保密通信之中,并在此基础上提出了一种超混沌掩盖一混沌加密方法,其中采用了非线性“扰频”技术。仿真结果显示:密文加密效果好,恢复图像与原图像差别很小。

关键词：混沌超混沌加密系统

维普期刊数据库