检索结果-南通市图书馆

A new policy to solve routing conflicts in shuffle-exchange networks

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) 2011年第7期54卷 1512-1523页

作者： GE FangBin 1,ZHAO Min 1,ZHANG Tao 1 & WANG JianXin 2 1 College of Command Automation PLA university of science and technology,nanjing 210007,china 2 Institute of china Electronic System Engineering,Beijing 100039,china College of Command Automation PLA university of science and technology Nanjing China Institute of china Electronic System Engineering Beijing China

Batch routing is an important approach for solving routing conflicts in SE (shuffle-exchange) ***,the complexity of batching and the uncertainty of batch size makes this approach *** on sequence division and routing coding concepts,we propose a method for detecting routing conflicts in an SE network,known as dividing detection that is more efficient than the method for window *** addition,a new conjecture relating to routing policies in SE networks is *** is proved using a constructive approach when n networks is *** this scheme,all the input signals can be transfered without conflicts and within two batches,while the efficiency of the batch routing is noticeably improved.

关键词： shuffle-exchange network sequence division routing coding transition sequence educed sequence

Learning interactions among multi-channel sequences with dynamical influence models

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) 2010年第7期53卷 1336-1344页

作者： ZHANG WeiDong, CHEN Feng & XU WenLi Department of Automation, National Laboratory for information science and technology, Tsinghua university, Beijing 100084, china Department of Automation National Laboratory for Information Science and Technology Tsinghua University Beijing China

Many real applications involve simultaneous recording and analysis of multi-channel information sources. Learning and modeling the interactions among channels is the kernel step to analyze and recognize system characteristics. This paper presents a model that learns the dynamical influence among multi-channel sequences. The model, dynamical influence model, permits functional roles of individual channels to change and models the changing influence strength between channels. By querying the values of influence factors, we can recognize the functional role of each channel qualitatively and learn about to what extent the chains influence each other quantitatively at any time. The experimental results on synthetic data and application of multi-person interaction recognition show that our model is reliable and effective.

关键词： multi-channel processing dynamical interaction influence model activity recognition

Review and Discussion on the Plum Rain Research in china

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Meteorological and Environmental Research 2011年第3期2卷 25-29,32页

作者： HUANG Zhen,XU Hai-ming,HU Jing-gao Provincial and Ministry of Education Key Laboratory for the Meteorological Disaster,nanjing university of information science & technology,nanjing 210044,china

[Objective] The research aimed to review the research progresses and the research achievements of plum rain in china.[Method] By using the precipitation,the sunshine data in the related observatories during 1961-2009 and the daily height field data of NCEP/DOE2 in 1996,which were provided by the National Meteorological information center,the prior researches about the plum rain in china were reviewed from the division of plum rain,the range of plum rain area and the space distribution.[Result] The formulation of an objective,unified plum rain division standard needed the further research and discussion,which provided the basis for the determination of plum rain range in *** the division of plum rain period,when the sunshine duration parameter was considered,the division of plum rain period could be more *** climatic mean result showed that the plum rain phenomenon still existed in the southwest part of Hubei Province where was in the west of Yichang,and the plum rain range could extend westward a *** the northwest part of the traditional plum rain area,the plum rain phenomenon wasn’t significant,and it didn’t belong to the plum rain range in *** rain and the plum rain in central Hunan,central Jiangxi and central south of Zhejiang should be differentiated by the objective and unified plum rain standard.[Conclusion] Chinese scholars still had some controversies about the typing of plum rain in *** selections of suitable analytical method and region had the important effects on the plum rain typing.

关键词： Plum rain division Plum rain range Plum rain typing china

DEFICIENT information MODELING OF MECHANICAL PRODUCTS FOR CONCEPTUAL SHAPE DESIGN

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2002年第1期15卷 1-5,26页

作者： Liu Jihong Shu Huilin CAD center，Huazhong university of science and technology，Wuhan 430074，china CAD center Huazhong University of Science and Technology Wuhan 430074

In allusion to the deficient feature of product information in conceptualdesign, a framework of deficient information modeling for conceptual shape design is put forward,which includes qualitative shape modeling (a qualitative solid model), uncertain shape modeling (anuncertain relation model) and imprecise shape modeling (an imprecise region model). In theframework, the qualitative solid model is the core, which represents qualitatively (using symbols)the conceptual shapes of mechanical products. The uncertain relation model regarding domainrelations as objects and the imprecise region model regarding domains as objects are used to dealwith the uncertain and imprecise issues respectively, which arise from qualitative shape modeling orexist in product information itself.

关键词： Conceptual shape design Qualitative solid model Spatial cognition

维普期刊数据库

RBF neural network and active circles based algorithm for contours extraction

在线全文

学校读者我要写书评

暂无评论

Progress in Natural science:Materials International 2007年第6期17卷 681-686页

作者： Zhou Zhiheng, Zeng Delu and Xie Shengli(College of Electronic & information Engineering, South china university of technology, Guangzhou 510640, china) College of Electronic and information Engineering South China University of Technology Guangzhou 510640 China

For the contours extraction from the images, active contour model and self-organizing map based approach are popular nowadays. But they are still confronted with the problems that the optimization of energy function will trap in local minimums and the contour evolutions greatly depend on the initial contour selection. Addressing to these problems, a contours extraction algorithm based on RBF neural network is proposed here. A series of circles with adaptive radius and center is firstly used to search image feature points that are scattered enough. After the feature points are clustered, a group of radial basis functions are constructed. Using the pixels’ intensities and gradients as the input vector, the final object contour can be obtained by the predicting ability of the neural network. The RBF neural network based algorithm is tested on three kinds of images, such as changing topology, complicated background, and blurring or noisy boundary. Simulation results show that the proposed algorithm performs contours extraction greatly.

关键词： contours extraction RBF neural network dynamic clustering.

A routing algorithm based on clusters and balanced use of energy for wireless sensor networks

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

控制理论与应用（英文版） 2010年第1期8卷 81-85页

作者： Liang ZHANG,Xiangdong WANG,Shujiang LI(School of information science and Engineering,Shenyang university of technology,Shenyang Liaoning 110178,china) School of information science and Engineering Shenyang University of Technology Shenyang Liaoning China

In a sensor network, data collected by different sensors are often correlated because they are observations of related phenomena. Efficient sensor data fusion is one of the most important issues in building real sensor networks. To balance energy cost, how to select a cluster head is a key problem that must be addressed. In this paper, we use a compression-centric data collection algorithm for use in wireless sensor networks. Also, we propose a balanced cluster head selection algorithm in each cluster. Simulation results are used to investigate the performance of the algorithm. Compared to the exhaustive search solutions, the proposed algorithm shows a significant improvement in power consumption.

关键词： Sensor networks Cluster Sink node Power consumption

维普期刊数据库

Construction of a multidimensional plane network-on-chip architecture based on the hypercube structure

在线全文

学校读者我要写书评

暂无评论

Progress in Natural science:Materials International 2009年第5期19卷 635-641页

作者： Chang Wu, Yubai Li, Qicong Peng, Song Chai, Zhongming Yang DSP Lab, School of Communication and information Engineering, university of Electronic science and technology of china, Chengdu 610054, china DSP Lab School of Communication and Information Engineering University of Electronic Science and Technology of China Chengdu 610054 China

In current network-on-chip (NOC) studies and in practical applications, the mesh structure is the most widely used and deeply researched structure. However, the hypercube structure is more symmetrical and regular than the mesh or torus structures. This paper compares the network characteristics of these three direct topologies and proposes a method to compress the hypercube into a plane structure. This structure, which has the multidimensional property based on the hypercube, is called the multidimensional plane (MDP) NOC. The compression process is divided into two steps: the transformation of router denotations and the connection of channels. Then, SystemC is used to implement the MDP NOC and it is compared with the mesh and torus NOCs in terms of four aspects of performance, including average latency time, normalization throughput, energy consumption and area cost.

关键词： NOC Hypercube Dimension SystemC Simulation

Stability of linear discrete switched systems with delays based on average dwell time method

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) 2010年第6期53卷 1216-1223页

作者： WANG Yong 1 , WANG Wei 1 & LIU GuoPing 2,3 1 Research center of information and Control, Dalian university of technology, Dalian 116024, china 2 Faculty of Advanced technology, university of Glamorgan, Pontypridd, CF37 1DL, UK 3 CTGT center in Harbin Institute of technology, Harbin 150001, china Research center of information and Control Dalian University of Technology Dalian China Faculty of Advanced technology University of Glamorgan Pontypridd UK CTGT center in Harbin Institute of technology Harbin China

This paper deals with the problem of exponential stability for a class of linear discrete switched systems with constant *** switched systems consist of stable and unstable *** on the average dwell time method, some switching signals will be found to guarantee exponential stability of these *** explicit state decay estimation is also given in the form of the solutions of linear matrix inequalities(LMIs).An example relating to networked control systems(NCSs) illustrates the effectiveness of the proposed method.

关键词： switched systems average dwell time time delay LMI

Secure network coding in the presence of eavesdroppers

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) 2010年第3期53卷 648-658页

作者： LUO MingXing1,2,3, YANG YiXian1,2,3, WANG LiCheng1,2,3 & NIU XinXin1,2,3 1information Security center, State Key Laboratory of networking and Switching technology, Beijing university of Posts and Telecommunications, Beijing 100876, china 2Key Laboratory of network and information Attack and Defence technology of MOE, Beijing university of Posts and Telecommunications, Beijing 100876, china 3National Engineering Laboratory for Disaster Backup and Recovery, Beijing university of Posts and Telecommunications, Beijing 100876, china information Security center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China Key Laboratory of network and information Attack and Defence technology of MOE Beijing University of Posts and Telecommunications Beijing China National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications Beijing China

Our concern, in the paper, is to construct information-theoretic secure network coding in the presence of eavesdroppers. Based on the generalized attack model and all-or-nothing transformation, the security of network coding in the generalized combination network can be characterized by the network capacity and the min-cut bound of wiretapping set from the source. Furthermore, it can be extended to any directed acyclic networks with single source. Compared with the traditional results, we construct information-theoretic secure network coding without additional encryptions and giving up any capacity.

关键词： all-or-nothing transformation secure network coding eavesdropping