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A Delay Tolerant Broadcast Protocol for VANETs

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A Delay Tolerant Broadcast Protocol for VANETs

International Conference on Broadcast technology and Multimedia Communication(BTMC 2010)

作者： Lianke Zhou Xiufeng Wang Gang Cui Hongwei Liu School of computer science and technology Harbin Istitute of technology Harbin china 150001 Yuchang Mo college of mathematics physics and information Engineering Zhejiang Normal university Jinhua Zhejiang china 321004

In this paper,a delay tolerant broadcast protocol is proposed for Vehicular Ad hoc NETworks（VANETs）.In VANETs,it is important for many applications to disseminate information to vehicles on the road environment via multi-hop broadcast *** existing schemes work on the assumption that the networks are ***,the environment of road traffic makes VANETs intermittently *** broadcast the messages efficiently,the storecarry-forward methodology of Delay Tolerant Network（DTN） is adopted to disseminate the broadcast messages in this work.A combined weighted algorithm is proposed to select suitable nodes for relaying by taking traffic rules and road traffic characteristics into *** the contacts occur,the transiting moments are set appropriately to cover more nodes in each *** results show that this broadcast protocol achieves high broadcast coverage ratio in sparse *** efficient broadcasting service is provided in the intermittently connected VANETs.

关键词： Vehicular Ad hoc NETworks(VANETs) Delay Tolerant Network(DTN) broadcast communication

Construction for M-arrays and application in structured light

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Journal of Shanghai university(English Edition) 2011年第1期15卷 63-68页

作者：贾小军张之江喻擎苍 Key Laboratory of Specialty Fiber Optics and Optical Access Networks School of Communication and Information Engineering Shanghai University college of mathematics Physics and Information Engineering Jiaxing University School of Informatics and Electronics Zhejiang Sci-Tech University

M-arrays are random arrays in which an appropriate sub-window appears only once in the whole array. Coded structured light based on M-arrays is one=shot technique to rapidly acquire 3D information of unknown surfaces by projecting suitable patterns onto a measuring surface. This paper presents a method to construct large size M-arrays based on the piece growing algorithm in which an array is constructed by many pieces through splicing each other. Reconstructing 3D shapes by utilizing the designed pattern based on constructed M-arrays for two objects are given.

关键词： M-arrays structured light piece growing 3D reconstruction

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圈量子引力中面积算符的本征值

武汉理工大学学报 2010年第8期32卷 133-135,142页

作者：包佳祺吉紫娟肖飞华中科技大学文华学院光信息科学与技术系武汉430074 湖北第二师范学院理论物理研究所武汉430205

首先利用黎曼几何的面积公式,构造了圈量子引力中的量子化面积算符。再把面积算符中的抓作用在自旋网态的腿上,并采用重耦理论的图形公式进行推算,得到了圈量子引力中一种曲面面积的本征值谱。以此本征值谱为基础,并以此种做法为依据,... 详细信息

首先利用黎曼几何的面积公式,构造了圈量子引力中的量子化面积算符。再把面积算符中的抓作用在自旋网态的腿上,并采用重耦理论的图形公式进行推算,得到了圈量子引力中一种曲面面积的本征值谱。以此本征值谱为基础,并以此种做法为依据,推广到对自旋网态的任意作用形式,进而得到了一种更一般的完备的面积本征值谱,从而使空间中曲面的面积实现了量子化。

关键词：面积算符面积本征值完备面积谱

Stability of weighted spectral distribution in a pseudo tree-like network model

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Chinese physics B 2016年第5期25卷 479-486页

作者：焦波聂原平黄赪东杜静郭荣华黄飞石建迈 Luoyang Electronic Equipment Test Center Luoyang 471003China college of Computer National University of Defense TechnologyChangsha 410073China college of information Systems and Management National University of Defense TechnologyChangsha 410073China

The comparison of networks with different orders strongly depends on the stability analysis of graph features in evolving systems. In this paper, we rigorously investigate the stability of the weighted spectral distribution（i.e., a spectral graph feature） as the network order increases. First, we use deterministic scale-free networks generated by a pseudo treelike model to derive the precise formula of the spectral feature, and then analyze the stability of the spectral feature based on the precise formula. Except for the scale-free feature, the pseudo tree-like model exhibits the hierarchical and small-world structures of complex networks. The stability analysis is useful for the classification of networks with different orders and the similarity analysis of networks that may belong to the same evolving system.

关键词： weighted spectral distribution pseudo tree-like model deterministic network scale-free and small-world network

Application of Rough Sets in Fuzzy Petri Nets

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Application of Rough Sets in Fuzzy Petri Nets

The Second Conference on Fuzzy information & Engineering

作者： MINGHU HA college of mathematics and Computer sciences, Hebei university, Baoding 071002, china YINGXIN WANG college of mathematics and Computer sciences, Hebei university, Baoding 071002, china DAZENG TIAN college of physics science and technology, Hebei university, Baoding 071002, china

By using attributes core and indiscernibility relation in rough sets, attributes reduction algorithm is given,expert knowledge system is simplified, the minimal set of effective rules is acquired, and a fuzzy Petri net is built. The Petri net can effectively decrease the complexity of the net structure. The algorithm proposed can be used to fuzzy reasoning by using a fuzzy Petri net,and an example illustrates the efficiency of combining rough sets and fuzzy Petri net.

关键词： rough sets reduction of attribute fuzzy Petri nets fuzzy reasoning

Minimum-norm Source Estimation of Magnetoencephalography Utilizing Tikhonov Regularization Technique

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Minimum-norm Source Estimation of Magnetoencephalography Uti...

CCAST“北京第二次医学影像物理和工程”国际研讨会

作者： Hu Jie Hu JingFirst Affiliated Hospital Zhejiang university college of Medicine Hangzhou china 310006 college of information Engineering Zhejiang university of technology Hangzhou china

＜正＞ In neuromagnetic source reconstruction, according to the dipole source model and distributed source model, there have two main classes of reconstruction techniques—parametric current dipole localization and nonparametric source reconstruction. MEG inverse problem base on distributed source model becomes an ill-posed undetermined linear problem. In this paper, In order to yield a unique and stable solution, we propose the minimum-norm estimation with Tikhonov regularization technique in order to yield an robust and plausible neural current distribution. We propose a modified regularization method, comparing its performance with the conventional method, computer simulation analysis show how the solution is improved.

关键词： MEG distributed source minimum-norm estimation Tikhonov regularization

information investigation for B92 protocol in quantum cryptography

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Information investigation for B92 protocol in quantum crypto...

Photonics Asia 2004:information Processing and Data Storage

作者： ZOU Ming *a b ZHANG Guo-ping a a.college of physics science and technology Central china Normal university Hubei Wuhan 430079 china b.Department of physics Hubei Institute of Nationalities Hubei Enshi 445000 china

In this paper, we simulate the quantum channel with a binary symmetric channel and a binary erasure channel, a series channel and a Markovian chain channel in classical information theory, then calcul

关键词： Quantum information theory quantum cryptography mutual information B92 protocol

A New Outlier Detection Algorithm Based on Manifold Learning

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A New Outlier Detection Algorithm Based on Manifold Learning

2010 Chinese Control and Decision Conference

作者： Zhigang Tang~(1,2),Jun Yang~1,Bingru Yang~1 1.School of information Engineering,university of science and technology Beijing,Beijing 100083,china 2.School of math and physics,Nanhua university,Hengyang 420003,china

＜正＞Detecting outliers in a large set of data objects is a major data mining task aiming at finding different mechanisms responsible for different groups of objects in a data *** existing approaches,however,are based on an assessment of distances（sometimes indirectly by assuming certain distributions） in the full-dimensional Euclidean data *** high-dimensional data,these approaches are bound to deteriorate due to the notorious"curse of dimensionality". In this paper,we propose a novel approach named MLOD（Manifold Learning -Based Outlier Detection）,This way,the effects of the"curse of dimensionality"are alleviated compared to purely distance-based approaches.A main advantage of our new approach is that our method does not rely on any parameter selection influencing the quality of the achieved *** studies conducted on both real and synthetic data sets show that significant improvements in detection rate and false alarm rate are achieved using the proposed framework.

关键词： Manifold Learning LIE algorithm Outlier detection

POSITIVE SOLUTIONS TO SINGULAR m-POINT BOUNDARY VALUE PROBLEMS OF A COUPLED SYSTEM OF DIFFERENTIAL EQUATIONS

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Annals of Differential Equations 2008年第2期24卷 163-170页

作者： Li Hongyu1,Sun Jingxian2,Cui Yujun1(1. college of information science and Engineering,Shandong university of science and technology,Qingdao 266510,Shandong 2. Dept. of math.,Xuzhou Normal university,Xuzhou 221116,Jiangsu)

Applying topological method,this paper investigates the existence of positive solu-tions to singular m-point boundary value problems of a coupled system of differential equations.

关键词： system of differential equations positive solution topological method