检索结果-南通市图书馆

Assessment and improvement of autocorrelation performance of chaotic sequences using a phase space method

在线全文

学校读者我要写书评

暂无评论

Science china({1. Sciences) 2011年第12期54卷 2667-2679页

作者： CHEN Bin school of Software and Communication Engineering,{1. university of finance and Economy, nanchang 330032, china 1. school of Software and Communication Engineering JiangXi University of Finance and Economy Nanchang 330032 China

Chaotic sequences have been widely used as pseudorandom sequences. However, how to judge whether their autocorrelation performance is good remains a problem because we have no simple method for assessing and improving the autocorrelation performance. Using a phase space method, we have discovered that the autocorrelation performance of a chaotic sequence is determined by whether its phase space trajectory is axis symmetrical, and have deduced theorems to describe and solve these problems. This paper presents a simple yet effective method to assess and improve the autocorrelation performance of chaotic sequences. Several simulations are presented to validate the theorems and method.

关键词： chaos autocorrelation pseudorandom sequences phase space

Group sparse representation for image categorization and semantic video retrieval

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({1. Sciences) 2011年第10期54卷 2051-2063页

作者： LIU YaNan 1.2 ,WU Fei 2 & ZHUANG YueTing 2 1.school of {1.,Zhejiang university of finance & economics,Hangzhou,31.01.,china 2 College of Computer Science and technology,Zhejiang university,Hangzhou,31.01.,china 1. school of {1. Zhejiang University of Finance & Economics Hangzhou 310018 China2. College of Computer Science and Technology Zhejiang University Hangzhou 310012 China

Multimedia content analysis and management are a promising and challenging *** this paper we develop a novel approach to image representation,which we call group sparse representation (GSR),for image classification and video *** basic idea is to represent a test image as a weighted combination of all the training *** particular,we introduce two sets of weight coefficients,one for each training image and the other for each ***,we formulate our concern as a group nonnegative garrote *** resulting representations are sparse,and they are appropriate for discriminant *** on Caltech1.1.and PASCAL VOC2008 image dataset and TRECVID2005 video corpus testify that our proposed approach is efficient and effective.

关键词： compressive sensing group sparse representation bag-of-SIFT-words nonnegative garrote l1.minimization apcluster

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

一种基于查找表的快速导航路径提取算法

系统仿真学报 2008年第21期20卷 5881-5884页

作者：袁非牛江西财经大学信息学院南昌330013

虚拟内窥镜是医学图像可视化与虚拟现实相结合的产物。为了缩短诊断时间,虚拟内窥镜需要提供一种自动导航方式来加快器官的浏览,通过分析已有细化算法提出一种快速的导航路径提取方法。该方法首先利用一种快速模板测试方法来生成26-邻... 详细信息

虚拟内窥镜是医学图像可视化与虚拟现实相结合的产物。为了缩短诊断时间,虚拟内窥镜需要提供一种自动导航方式来加快器官的浏览,通过分析已有细化算法提出一种快速的导航路径提取方法。该方法首先利用一种快速模板测试方法来生成26-邻域编码的查找表,然后根据此查找表快速地查询边界体素的删除标志,从而将复杂耗时的模板测试过程转换成简单快速的查询。提取的骨架经裁剪、平滑后可以用于虚拟摄像机的自动飞行引导。实验结果表明,该算法提取效率高、速度快,基本上能满足虚拟内窥镜系统导航路径提取的要求。

关键词：虚拟内窥镜 3D细化自动导航查找表

Local asymptotic behavior of the survival probability of the equilibrium renewal model with heavy tails

在线全文

学校读者我要写书评

暂无评论

Science china Mathematics 2005年第3期48卷 300-306页

作者： JIANG Tao & CHEN Yiqing school of {1.. Nanjing university of {1. and economics, Nanjing 21.003, china school of economics and Management, Guangdong university of technology, Guangzhou 51.090, china 1. school of {1. Nanjing University of Finance and Economics 210003 Nanjing China 2. school of {1. and Management Guangdong University of Technology 510090 Guangzhou China

Recently, tang established a local asymptotic relation for the ruin probability in the Cramer-Lundberg risk model. In this short note we extend the corresponding result to the equilibrium renewal risk model.

关键词： geometric sums, heavy-tailed distribution, ladder height, the equilibrium renewal model, the ruin probability.

Forecasting Thermal State in Blast Furnace Using Fuzzy Prediction Controller Optimized By Wavelet De-noising

在线全文

学校读者我要写书评

暂无评论

Forecasting Thermal State in Blast Furnace Using Fuzzy Predi...

Medical image segmentation using improved FCM

201. International Conference on Advanced Measurement and Test (AMT 201.)

作者： Shihua Luo 1.a 1.school of {1. Management jiangxi university of finance and economics nanchang 330013 china

A new fuzzy prediction controller is established to prediction for silicon content in blast furnace hot *** forecasting process is only used the historical information of silicon content. This new algorithm consists of five steps:step 1.de-noises silicon content numerical data by wavelet analysis to smooth out noise;step 2 divides the input and output spaces of the de-noising numerical data into fuzzy regions;step 3 generates fuzzy rules from the de-noising data;step 4 assigns a degree to each of the generated rules for the purpose of resolving conflicts among the generated rules;step 5 determines a fuzzy prediction controller from input space to output space based on such *** results show that:84%hit rates of prediction in the range of[Si]± 0.1.is attained using the prediction controller.

关键词： Blast furnace silicon content fuzzy prediction wavelet de-noising.

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Science china({1. Sciences) 2012年第5期55卷 1052-1061页

作者： ZHANG XiaoFeng 1,2,ZHANG CaiMing 1,3,4,tanG WenJing 1,2 & WEI ZhenWen 1 1 school of Computer Science and technology,Shandong university,Jinan 250101,china 2 school of information and Electrical Engineering,Ludong university,Yantai 264025,china 3 school of Computer Science and technology,Shandong university of finance and economics,Jinan 250014,china 4 Shandong Province Key Lab of Digital Media technology,Jinan 250014,china 1. school of Computer Science and {1. Shandong University Jinan 250101 China2. School of Information and Electrical Engineering Ludong University Yantai 264025 China3. School of Computer Science and Technology Shandong University of Finance and Economics Jinan 250014 China4. Shandong Province Key Lab of Digital Media Technology Jinan 250014 China

Image segmentation is one of the most important problems in medical image processing,and the existence of partial volume effect and other phenomena makes the problem much more *** C-means,as an effective tool to deal with PVE,however,is faced with great challenges in *** at this,this paper proposes one improved FCM algorithm based on the histogram of the given image,which will be denoted as HisFCM and divided into two *** first phase will retrieve several intervals on which to compute cluster centroids,and the second one will perform image segmentation based on improved FCM *** with FCM and other improved algorithms,HisFCM is of much higher efficiency with satisfying *** on medical images show that HisFCM can achieve good segmentation results in less than 0.1.second,and can satisfy real-time requirements of medical image processing.

关键词： FCM histogram image segmentation medical image processing

Evaluation model of venture investment based on fuzzy matter-element method of combined weight

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Southeast university(English Edition) 2008年第S1期24卷 27-32页

作者： Meng Lin1.Bao Guangping2 Sun Yutao1.1.Department of economics, Dalian {1. of technology, Dalian 1.6024, china)(2 finance and Taxation school, Northeast finance and Economy {1., Dalian 1.6025, china) Department of economics Dalian University of Technology Dalian 116024 China finance and Taxation {1. Northeast Finance and Economy University Dalian 116025 China

An evaluation model of an international venture investment project on the basis of fuzzy matter-element and combined weight methods is introduced. First, the compound fuzzy matter-element of optimal subordinate degree is constructed on the principle of the bigger-more-optimal or the less-more-optimal depending on the actual evaluation indicators, and combined with standard fuzzy matter-element to form a difference-square fuzzy matter-element. Secondly, a combined weight is calculated by both {1. entropy and the expert grading method. Finally, the compound fuzzy matter-element of Euclidian approach degree by M(·,+)method is constituted and used to classify venture investment projects. Based on the model above, six venture investment projects in a company are evaluated, and the results show that the projects are all good, which is demonstrated by the good income of the projects. Therefore, the coincidence of evaluation results and actual operation status indicates that the model is of great value in practical application.

关键词： combined weights fuzzy matter-element venture investment

A Positive Analysis for BPR of the Third Party Logistics

在线全文

学校读者我要写书评

暂无评论

厦门大学学报（自然科学版） 2002年第S1期41卷 231-232页

作者： LI Yan-feng 1. WU Xiao-song 2 (1. Management school, Huazhong {1. of Science and technology, Wuhan 430074, china 2. information Management school, Yunnan {1. of finance and Trade, Kunming 650221. china)

Facing the opportunities and challenges of china’s en try into WTO, logistics enterprises take BPR as an impor{1.t way to improve the core *** modern logistics is a systematic engineering and its require ments are the s{1.dardization and normalization for enhancing the Chinese enterp rises’ level of logistic *** paper reveal the impor{1.ce of manageme nt technique,information technique and business model in enterprise’s BPR throug h the positive analysis for business process of the third party logistics as a new system after reengineering businees process. Reorganization of marketing target. The characters of business procedure after N ew Sunshine recomposed include: "the last mile " service systems of logistics; s etting up HUB to control many end-points in big and middle cities, setting up s ingle-points in small cities, the small parts acting delivering system which st yle of "assembly and allot" are made of in. Reorganization of business model. The New Sunshine reorganized has three aspects of business model which set up: HUB, end-point and single-point. Reorganization of business *** mainly business process of restructure Ne w Sunshine include : s{1.dard quote declaring prices to all attendants; on line, timely and exactly declaring prices; The net contract of B2C work on line; Tran smit to attendant; Logistice operating; feedback the working information; User t rack goods condition; Settling information; paying and so on, the different busi ness can separate into kinds of right corresponding to the business process, suc h as the picture of distributing parcel, ordering, moving, picking, transporting , delivering, information, inquiring and settling. Set up s{1.dard systems. Aims to execute s{1.dard management is to make distribu te and logistics for norm and s{1.dard, according to the resources share tog ether with the progresses especially and base on reducing the necessary expenses to reduce the living expenses, while low cost

关键词： third party logistics management technique info rmation technique business model

Multiple constraints QoS multicast routing optimization algorithm in MANET based on GA

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2008年第3期18卷 331-336页

作者： Baolin Sun a,c, Shangchao Pi b, Chao Gui a, Yue Zeng d, Bing Yan a, Wenxiang Wang c, Qianqing Qin c a school of Computing, Hubei university of economics, Wuhan 430205, china b College of Science, Zhongyuan university of technology, Zhengzhou 450007, china c State Key Laboratory of information Engineering in Surveying, Mapping & Remote Sensing, Wuhan university, Wuhan 430079, china d Department of Computing, jiangxi Vocational College of finance and economics, jiangxi 332000, china school of Computing Hubei University of Economics Wuhan 430205 China College of Science Zhongyuan University of Technology Zhengzhou 450007 China State Key Laboratory of information Engineering in Surveying Mapping & Remote Sensing Wuhan University Wuhan 430079 China Department of Computing Jiangxi Vocational College of Finance and Economics Jiangxi 332000 China

Usually multiple quality of service (QoS) guarantees are required in most multicast applications. This paper presents a multiple con-straints algorithm for multicast traffic engineering in mobile ad hoc networks (MANET). The proposed algorithm is a new version of multiple constraints QoS multicast routing optimization algorithm in MANET based on genetic algorithm (MQMGA). The proposed MQMGA can optimize the maximum link utilization, the cost of the multicast tree, the selection of the long-life path, the average delay and the maximum end-to-end delay. Experimental result shows that the approach is efficient, has promising performance in multicast traffic engineering and for evaluating the route stability in dynamic mobile networks.

关键词： Ad hoc network Multicast routing QoS Genetic algorithm