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The Traffic Data Compression and Decompression for Intelligent Traffic Systems Based on Two-Dimensional Wavelet Transformation

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The Traffic Data Compression and Decompression for Intellige...

第七届国际信号处理会议

作者： Yang xiao Yu-ming Xie Lingyun Lu and Shuang Gao Institute of information {2. beijing jiaotong university beijing 100044 p. r. China E-mail: yxiao@***

The algorithms of traffic data compression and decompression based on 2.D wavelet transformation technology have been developed. The composition of urban intelligent traffic dada and the principle

关键词： intelligent traffic systems data compression two-dimensional wavelet transformation

Topology Optimization of Two-Dimensional phononic Crystals Using FDTD and Genetic Algorithm

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Topology Optimization of Two-Dimensional Phononic Crystals U...

2.11年全国压电和声波理论及器件应用研讨会

作者： xiao-Xing SU~(1,*) Tian-Xue Ma~2.Hao-Wen Dong~2.Yue-Sheng Wang~2.1 School of Electronic and information Engineering,{2. jiaotong university,{2. 100044 2.Institute of Engineering Mechanics,{2. jiaotong university.{2. 100044

＜正＞The band gap prop.r.ies of a phononic crystal（pNC） are generally strongly dependent on its topologic structure （including the lattice form,filling fraction and scatterer shape）.In practical use,a pNC is often expected to have as wide a band gap as *** inverse topology optimization has been proved to be an effective way of the photonic or phononic band gap maximization(see ***,***,Topology Optimization:Theory,

关键词： phononic Crystal Topology Optimization Finite Difference Time Domain Genetic Algorithm

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不确定二维多项式族的稳定性检验集合

系统科学与数学 2004年第2期24卷 278-288页

作者：肖扬吴江梁满贵北京交通大学信息科学研究所北京100044

不确定二维多项式族,包括多胞形二维多项式族,区间二维多项式族,钻石形二维多项式族,其鲁棒稳定性可由其棱边多项式的稳定性确定.如果二维多项式族的不确定参数较多,被检验棱边多项式的数目可能出现所谓组合爆炸问题.为解决这一问题,提... 详细信息

不确定二维多项式族,包括多胞形二维多项式族,区间二维多项式族,钻石形二维多项式族,其鲁棒稳定性可由其棱边多项式的稳定性确定.如果二维多项式族的不确定参数较多,被检验棱边多项式的数目可能出现所谓组合爆炸问题.为解决这一问题,提出一检验集合,该集合根据棱边二维多项式的凸方向来构造,仅对属于该检验集合棱边二维多项式进行稳定性检验,从而大大地减少被检验的棱边二维多项式数目.给出一例来说明这种新方法的可行性.

关键词：不确定二维多项式族鲁棒稳定性棱边多项式检验定理组合爆炸

A New Kind of Filtered Method and rendering of Medical Ultrasound Data

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A New Kind of Filtered Method and Rendering of Medical Ultra...

第七届国际信号处理会议

作者： Jing Fang Yang xiao Shao-hai Hu Institute of information {2., beijing jiaotong university, beijing 100044, p. r. China E-mail: shanshifangjing@*** yxiao@***

Limited research has been done on applications of rendering techniques in medical ultrasound imaging because of the difficulties in sep.r.ting the reflected waves and the dissipated waves. We prop

关键词： Imaging rendering boundary detection maximum value projection average value projection distance to maximum value center of gravity gradient magnitude projection enhancement of the distant field

Effects of poisson’s ratio on the Band gaps of Three-Dimensional Solid/Solid phononic Crystals

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Effects of Poisson’s Ratio on the Band gaps of Three-Dimens...

2.11年全国压电和声波理论及器件应用研讨会

作者： Tian-Xue Ma~1 xiao-Xing Su~2.Yan-Feng Wang~1 Yue-Sheng Wang~(1,*) 1 Institute of Engineering Mechanics,beijing {2. university,beijing 100044 2.School of Electronic and information Engineering,beijing {2. university,beijing 100044

＜正＞phononic crystals are a kind of acoustic composite materials which have p.r.odic structures and exhibit elastic wave band *** to their unique prop.r.ies the phononic crystals have potential applications in acoustic devices and noise control,*** effects of both positive and negative poisson’s ratios on the typical Bragg band gaps in

关键词： phononic crystal Band gap poisson’s ratio Finite Difference Time Domain

CALCULATION OF THrEE-DIMENSIONAL pHONONIC BAND STrUCTUrES USING THE COMBINED METHOD OF FDTD AND FILTEr DIAGONALIZATION

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CALCULATION OF THREE-DIMENSIONAL PHONONIC BAND STRUCTURES US...

2.10全国压电和声波理论及器件技术研讨会

作者： xiao-xing SU~1,Tian-xue MA~2.Yue-sheng WANG~2.1 School of Electronic and information Engineering,{2. jiaotong university, Xizhimenwai,Shangyuancun 3,Haidian District,{2. 100044,China 2.Institute of Engineering Mechanics,{2. jiaotong university, Xizhimenwai,Shangyuancun 3,Haidian District,{2. 100044,China

The combined method of finite difference time domain(FDTD) and filter diagonalization is proposed to calculate the band structures of three-dimensional(3D) phononic crystals(pNCs).Numerical simulations for a 3D solid pNC system show that,with this combined method,relatively accurate calculation results of the band structures can be obtained when relatively few FDTD iterations are run.

关键词： phononic crystal finite difference time domain filter diagonalization

Enhanced fluorescence sensing of tetracycline with Ti_(2.C quantum dots

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Nano research 2024年第4期17卷 3180-3188页

作者： Dejia Hu ShangZuo Jiang Tianhao Xia Danyang xiao Yan Li Yanbing Hou Jin Zhong Zhang Ying-Chih pu School of Materials science and Engineering University of Science and Technology BeijingBeijing 100083China Key Lab Luminescence&Optical information Ministry EducationBeijing JiaoTong UniversityBeijing 100044China Dep.r.ment of Chemistry and Biochemistry University of CaliforniaSanta CruzCalifornia 95064USA Dep.r.ment of Materials science "National University of Tainan"Tainan 700301TaiwanChina

Ti_(2.C quantum dots(QDs)with rich surface functional groups have been synthesized using a hydrothermal method,and used to detect tetracycline(Tc)based on enhanced *** interaction between the surface functional groups of Ti_(2.C QDs and Tc enhanced the fluorescence of Tc at 514 nm,which is used to detect Tc quickly and *** optimal conditions,the fluorescence intensity was linear to the concentration of Tc in the range of 50.0–30.0μM,with a detection limit of 2..6 ***,the Tc-Ti_(2.C QDs detection system was evaluated for detection of Tc in milk and artificial *** study demonstrates a new and simple strategy for Tc detection,which is imp.r.ant for food safety and human health.

关键词： Ti_(2.C MXene quantum dots tetracycline fluorescence enhancement detection

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基于单层小波变换的压缩感知图像处理

通信学报 2010年第S1期31卷 52-55页

作者：岑翼刚陈晓方岑丽辉陈世明北京交通大学信息科学研究所北京100044 中南大学信息科学与工程学院湖南长沙410083 华东交通大学电气与电子工程学院江西南昌330013

根据图像小波变换系数层的特点,提出了基于单层小波变换的压缩感知算法,保留图像低频系数,只对高频系数进行测量。重构时,利用正交匹配追踪算法(OMp)对高频系数进行恢复,再进行小波反变换重构图像。仿真结果表明,与原有压缩感知算法相比... 详细信息

根据图像小波变换系数层的特点,提出了基于单层小波变换的压缩感知算法,保留图像低频系数,只对高频系数进行测量。重构时,利用正交匹配追踪算法(OMp)对高频系数进行恢复,再进行小波反变换重构图像。仿真结果表明,与原有压缩感知算法相比,重构图像质量得到极大提升,在相同的测量点数下,pSNr平均提高2.4dB。

关键词：压缩感知图像处理单层小波变换图像编码

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用于大工业过程建模的新型小波神经网络结构

系统工程与电子技术 2004年第7期26卷 941-944页

作者：李换琴李晓华万百五西安交通大学理学院陕西西安710049 北京工业大学信号与信息处理研究室北京100022 西安交通大学系统工程研究所陕西西安710049

提出一种新的小波神经网络结构 ,旨在解决输入变量比较多、变量分先后次序起作用的一类问题。该网络结构类似于多层前向神经网络 ,不同的是将一部分输入节点移至隐层 ,输入变量不是由同一层输入 ,而是根据变量起作用的前后次序分别在网... 详细信息

提出一种新的小波神经网络结构 ,旨在解决输入变量比较多、变量分先后次序起作用的一类问题。该网络结构类似于多层前向神经网络 ,不同的是将一部分输入节点移至隐层 ,输入变量不是由同一层输入 ,而是根据变量起作用的前后次序分别在网络的不同层输入 ,从而使网络的规模减小 ;同时 ,隐层神经元的激励函数是一维小波函数 ,避免了多元小波函数带来的维数灾难问题。因此 ,该神经网络是处理高维问题的有效工具 ,尤其适用于包含多道加工工序的大工业过程的建模。将该神经网络用于热连轧产品质量建模 ,并经过了实测数据拟合与检验。试验结果表明 ,提出的小波神经网络结构是可行的 ,而且有很好的应用前景。

关键词：小波神经网络高维输入多输入层加工工序大工业过程质量模型热连轧机