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Singularity Detection of Signals Based on their Wavelet Transform

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The Journal of China Universities of Posts and Telecommunications 2000年第3期7卷 12-16页

作者： ZHENG Ji ming (chongqing University of Posts and Telecommunications, chongqing 400065,P.R. China) chongqing University of Posts and Telecommunications Chongqing 400065 P.R. China

This paper introduces a multiresolution decomposition of signals based on their wavelet transform. The different behaviors of the wavelet transform between the signal and the noise are compared. An algorithm of singul... 详细信息

关键词： wavelet transform Lipschitz exponents, singularity detection

Chaos Synchronization on Parameters Adaptive Control for Chen Chaotic System

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The Journal of China Universities of Posts and Telecommunications 2003年第3期10卷 91-94页

作者： ZHOU Ping (Institute of Nonlinear Systems, chongqing University of Posts and Telecommunications, chongqing 400065, P.R. China) Institute of Nonlinear Systems Chongqing University of Posts and Telecommunications Chongqing 400065 P.R. China

Chaos synchronization of Chen chaotic system for parameters unknown isdiscussed in this paper using a scalar output. Using the concept of conditional Lyapunov exponents,the negativity of all Lyapunov exponents shows the synchronization of transmitter systems withreceiver systems even though system parametes are not known to receiver systems.

关键词： chen chaotic system chaos synchronization parameter

The Integrated Control-Mechanism in ATM-Based Networks

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The Journal of China Universities of Posts and Telecommunications 2000年第Z1期 20-25页

作者： GUO Jun-neng, CHEN Ji-nu (Scientific Institute of chongqing University of Posts and Telecommunications, chongqing 400065 P. R. China)

Survivability is one of the important issues in ATM-based networks since even a single network element failure may cause a serious data loss. This paper introduces a new restoration mechanism based on multi-layer ATM survivable network management architecture. This mechanism integrates the general control and restoration control by establishing the Working VPs logical network, Backup VPs logical network and spare logical network in order to optimally utilize the network resources while maintaining the restoration requirements.

关键词： survivability ATM restoration multi-layer working-VPs backup-VPs

A Fractal Hierarchical Structrural Model of Global Netwowk Based on Hyperstar Topology

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Systems Science and Systems Engineering 2000年第2期10卷 194-200页

作者： CHEN Fa\|tang,\ ZHOU Zong\|fang,\ YANG Chun\|de Department of Basic Course, chongqing University of Posts and Telecommunications, chongqing 400065, China

With the development of internationalization,the research of global network theory is becoming more and more important. In this paper, we propose a fractal hierarchical structural model of global network based on hyperstar topology, and its growing and developmental procedure is discussed. Last, we give an example of the structural model. This structural model is an important tool to describe Internet.

关键词： hyperstar Internet structure fractal growth

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一个新分数阶超混沌系统及其混沌同步

物理学报 2008年第9期57卷 5407-5412页

作者：周平程雪峰张年英重庆邮电大学应用物理研究所重庆400065 重庆邮电大学非线性系统研究所重庆400065

给出了一个新的分数阶超混沌系统,利用严格数学理论实现了该分数阶超混沌系统的混沌同步,在同步过程中并未删除响应系统的非线性项,理论分析与仿真计算表明了同步方法的有效性.

关键词：分数阶超混沌系统混沌同步非线性项

A New Reflector Antenna Based on the Fresnel Principle

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The Journal of China Universities of Posts and Telecommunications 2001年第2期8卷 66-68页

作者： DU Hui ping (Department of Radio Engineering, chongqing University of Posts and Telecommunications, chongqing 400065,P.R.China) Department of Radio Engineering Chongqing University of Posts and Telecommunications

A new type of reflector antenne is proposed, which applies the 1 D Fresnel zone phase correction to the classical parabolic cylindrical reflector, providing an alternative to the dual parabolic cylindrical ones discussed by Sanad and Shafai [1] . The focusing characteristics of the new reflector are analyzed by physical optics method, and numerical results are illustrated to evaluate its applicability.

关键词： fresnel zone phase correction reflector antenna physical optics method

Study on An Absolute Non-Collision Hash and Jumping Table IP Classification Algorithms

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Wuhan University Journal of Natural Sciences 2004年第5期9卷 835-838页

作者： SHANG Feng-jun 1,2 ,PAN Ying-jun 1 1. Key Laboratory of Opto-Electronic Technology and System of Ministry of Education/College of Opto-Electronic Engineering,chongqing University, chongqing 400044,China 2. College of Computer Science and Technology, chongqing University of Posts and Telecommunications, chongqing 400065,China chongqing University Key Laboratory of Opto-Electronic Technology and System of Ministry of Education/College of Opto-Electronic Engineering Chongqing China (GRID:grid.190737.b) (ISNI:***) chongqing University of Posts and Telecommunications College of Computer Science and Technology Chongqing China (GRID:grid.411587.e) (ISNI:***) chongqing University Key Laboratory of Opto-Electronic Technology and System of Ministry of Education/College of Opto-Electronic Engineering Chongqing China (GRID:grid.190737.b) (ISNI:***)

In order to classify packet, we propose a novel IP classification based the non-collision hash and jumping table trie-tree (NHJTTT) algorithm, which is based on noncollision hash Trie-tree and Lakshman and Stiliadis proposing a 2-dimensional classification algorithm (LS algorithm). The core of algorithm consists of two parts: structure the non-collision hash function, which is constructed mainly based on destination/source port and protocol type field so that the hash function can avoid space explosion problem; introduce jumping table Trie-tree based LS algorithm in order to reduce time complexity. The test results show that the classification rate of NHJTTT algorithm is up to 1 million packets per second and the maximum memory consumed is 9 MB for 10 000 rules. Key words IP classification - lookup algorithm - trie-tree - non-collision hash - jumping table CLC number TN 393.06 Foundation item: Supported by the chongqing of Posts and Telecommunications Younger Teacher Fundation (A2003-03).Biography: SHANG Feng-jun (1972-), male, Ph.D. candidate, lecture, research direction: the smart instrument and network.

关键词： IP classification lookup algorithm trie-tree non-collision hash jumping table

Quantum-inspired evolutionary tuning of SVM parameters

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Progress in Natural Science:Materials International 2008年第4期18卷 475-480页

作者： Zhiyong Luo a, Ping Wanga, Yinguo Lia, Wenfeng Zhang b, Wei Tangb, Min Xiang a a School of Automation, chongqing University of Posts and Telecommunications, chongqing 400065, China b School of Automation, Northwestern Polytechnical University, Xi’an 710072, China School of Automation Chongqing University of Posts and Telecommunications Chongqing 400065 China School of Automation Northwestern Polytechnical University Xi’an 710072 China

The most commonly used parameters selection method for support vector machines (SVM) is cross-validation, which needs a long- time complicated calculation. In this paper, a novel regularization parameter and a kernel parameter tuning approach of SVM are pre- sented based on quantum-inspired evolutionary algorithm (QEA). QEA with quantum chromosome and quantum mutation has better global search capacity. The parameters of least squares support vector machines (LS-SVM) can be adjusted using quantum-inspired evo- lutionary optimization. Classification and function estimation are studied using LS-SVM with wavelet kernel and Gaussian kernel. The simulation results show that the proposed approach can effectively tune the parameters of LS-SVM, and the improved LS-SVM with wavelet kernel can provide better precision.

关键词： Quantum-inspired evolutionary algorithm (QEA) Parameters tuning Support vector machines (SVM) Least squares support vector machines (LS-SVM)

Tracking Control and Synchronization for Two-Dimension Discrete Chaotic Systems

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The Journal of China Universities of Posts and Telecommunications 2002年第3期9卷 7-10页

作者： CHEN Xi ming, ZHOU Ping (Institute of Electronic Engineering, chongqing University of Posts and Telecommunications, chongqing 400065, P.R.China) Institute of Electronic Engineering Chongqing University of Posts and Telecommunications Chongqing 400065 P. R. China

The popular method of tracking control and synchronization for two-dimensiondiscrete chaotic systems is put forward in this paper, and the chaotic system track arbitrarilyreference signal is realized. This method is a... 详细信息

关键词： discrete chaotic systems tracking control reference signal