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Wireless Monitoring System of Vehicle Overspeed on Freeway Based on GPRS

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Wireless Monitoring System of Vehicle Overspeed on Freeway B...

第二十七届中国控制会议

作者： Ma Zengqiang 1,3,Gao Guosheng 2,Song Wanmin 3,Yan Yan 3 1.School of Mechanical and Electronic Control Engineering,beijing Jiaotong university,beijing 100044,P.R.china 2.Office of Scientific Research,Shijiazhuang Railway Institute,Shijiazhuang 050043,P.R.china 3.School of Electrical and Electronic Engineering,Shijiazhuang Railway Institute,Shijiazhuang 050043,P.R.china

Vehicle overspeed is an important reason for the traffic accident on the freeway and it is helpful and necessary to monitor the peccancy behavior of over *** this paper,design method of the overspeed wireless monitoring system based on GPRS（General Packet Radio System） is discussed,and the configuration of its hardware and software is *** whole system consists of the subsystems of the vehicle overspeed monitoring stations that are distributed on the free-way and the remote control *** the over speed action is detected,two images will be captured,analyzed and *** the information of the overspeed vehicle’speed,peccancy time,peccancy place serial number,compressed image and etc,will be written to the wireless modem of Motorola G20 through the serial interface and sent to the remote monitoring center through the GPRS network and the GGSN *** remote control center is responsible for data displaying and *** the technologies of sensor,number plate recognition and GPRS,the whole monitoring system stands up the trend of vehicle overspeed surveillance on *** design and application of the new type of vehi-cle overspeed monitoring system will undoubtedly improve the automatic and intelligent management on freeway.

关键词： GPRS Technology Vehicle overspeed Motoring System Freeway

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BP神经网络在铁路运量预测模型中的应用

铁路计算机应用 2004年第12期13卷 9-12页

作者：赫英广王启东孙远运湖南大学软件学院长沙410082 铁道部信息中心北京100844

将神经网络中的BP算法应用到货运运量预测方面,对铁路货运运量进行了预测,并对该模型在预测时产生的误差进行了分析。目的在于提高铁路货运运量预测能力,实现铁路货运的合理运输。

关键词：运量预测 BP算法误差分析定量预测运输网络模型

Improved Glauber model for the reactions induced by Halo Nuclei and Stable Nuclei

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Improved Glauber model for the reactions induced by Halo Nuc...

CCAST“放射性束物理”研讨会

作者： Wenjun Guo, Huanqing Jiang, Jianye Liu Wei zuo, Zhongzhou Ren, Xiguo Lee, Zenghua Li1. center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator,Lanzhou 730000, P.R.china2. Institute of Modem Physics, The Chinese Academy of Sciences, Lanzhou 730000, P.R.china 3.Institute of High Energy Physics, The Chinese Academy of Sciences, beijing 100039, P.R.china4.Physics department of Nanjing university, Nanjing 210008, P.R.china

＜正＞We develop the method for the calculation of the total reaction cross sections induced by thehalo nuclei and stable nuclei. This approach is based on the Glauber theory, which is valid for thereactions at high energies. It is extended for reactions at low energy and at the intermediate energy bycorrecting with the quantum correction and Coulomb correction under the assumption of the effectivenuclear density distribution. The calculated results for the total reaction cross section induced by stablenuclei agrees well with the experimental data within 10 percent accuracy. The comparison between thenumerical results and the experimental data for the neutron halo nucleiand the proton halo nucleiindicates a satisfactory agreement after considering the halo structure of these nuclei, which implies thequite different mean fields for the reactions induced by halo nuclei and stable nuclei. The halo nucleondistributions and the root mean square radii of these nuclei can be extracted from above ***, it is clear to see that the medium correction of the nucleon-nucleon collision has little effecton the total reaction cross sections induced by the halo nuclei due to the very weak binding and the veryextended density distribution, which is quite different from the reactions induced by the stable nucleiwith the salient medium correction.

关键词： total reaction cross section improved Glauber theory halo nuclei

Research on Quaternion Spline Interpolation Algorithm for 5-axis Machining

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Research on Quaternion Spline Interpolation Algorithm for 5-...

2009 ISECS International Colloquium on Computing, Communication, Control, and Management

作者： Peinan Li1,2,3 1 College of Computing&Communication Engineering, Graduate university of the Chinese Academy of Sciences,beijing,100049,china. 3 MSI Research Institute,Wolfson School of Mechanical and Manufacturing Engineering,Loughborough university,Loughborough,LE11 3TU,UK.Ruifeng Guo1,2 2 Shenyang Institute of Computing Technology,Chinese Academy of Sciences,National Engineering Research center For High-end CNC,Shenyang 110171,china.

Applications for 5-axis have increased tremendously in recent *** curved surfaces using CNC software represents a challenging *** conventional interpolation algorithms for 5-axis CNC machining are focused on studying a curved surface is approximated by a linear grid of closely spaced points,which are traversed in a linear or circular interpolation mode to machine the desired shape. However,it can not only cause machining path error,but also cause a lot of wear and tear on the *** overcome these problems,a research on interpolation algorithm for 5-axis tool paths generated using quaternion-quintic spherical Bézier spline for tool positioning and orientation was presented In this *** proposed algorithm was verified by Matlab *** analysis of results was also provided in this *** proposed algorithm is suitable for 5-axis high- speed and high-precision machining.

关键词： spline interpolation quaternion 5-axis machining

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心率变异性分析方法的现状与展望

生物医学工程与临床 2004年第1期8卷 53-57,60页

作者：柴继红吴水才白燕萍常晓年北京工业大学生物医学工程中心北京100022

心率变异 (HRV)蕴涵着心血管神经及体液调节的大量信息 ,心率变异性分析是近年来心电信号处理领域的研究热点 ,它对于相关疾病的无创检测具有重要的临床意义。本文系统阐述了HRV经典分析方法及其最新研究进展。

关键词：心率变异自主神经系统心电图体液调节

Research on Server Load Prediction Based on Wavelet Packet Theory

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Research on Server Load Prediction Based on Wavelet Packet T...

2007 1st International Symposium on information Technologies and Applications in Education(ISITAE2007)

作者： Zijiang Yang 1 1 Shandong Computer Science center,Jinan,Shandong,P.R.china,250014

A server load forecast model is presented based on wavelet packet analysis in this ***,the server load time series are decomposed and reconstructed by wavelet packet analysis based on the model in order to get many server signal branches with the same length of history series;then the BP neural network prediction models are constructed respectively for these branches,and finally their predicted results were combined into final load *** analysis and Experiments show that the frequency of each signal branch after the original signal is decomposed by wavelet packet is relatively simple and the correlation becomes stronger,so they become easier to be *** proposed method is superior to traditional predicting approach.

关键词： Server load,wavelet packet decomposition,wavelet packet reconstruction,load prediction

String [Mn3] Units with Formate or Azide towards New Single-Chain Magnets

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String [Mn3] Units with Formate or Azide towards New Single-...

The 9th china-Japan Joint Symposium on Conduction and Photoconduction in Organic Solids and Related Phenomena

作者： Hong-Bin Xu Bin-Wu Wang Feng Pan Zhe-Ming Wang Song Gao~* beijing National Laboratory for Molecular Sciences,State Key Laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering,Peking university,beijing 100871,P.R.china

Recently single-molecule magnet（SMM） and single-chain magnet（SCM） have been received great attention for their unique magnetic properties,such as slow relaxation and large hysteresis,providing the opportunity of potential application in information storage and quantum computation at molecular *** principle,SMM could be linked as building block by covalent bonds to control the dimension of the structure and magnitude of the inter-SMM magnetic interaction *** to now,a few SCMs have been created from trinuclear or tetranuclear SMM building blocks,and they have improved blocking temperature（T）and barrier than those of *** this work,a trinuclear compound [MnO（tBu-sao）Cl（CHOH）]·HO was used as a building unit,which displays a slow relaxation behavior below *** the Cl ion with formate or azide ion leads to the string of these [Mn]units along the easy axis of the magnetization,corresponding to the chain *** linked [Mn]units through formate or azide show SCM behavior with T and bigger barrier than [Mn]unit itself because of the enhancement of the uniaxial anisotropy.

关键词：

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一种融合网络语音业务系统的实现方法的研究

计算机技术与发展 2009年第11期19卷 238-241,245页

作者：肖巍周文安马飞宋俊德北京邮电大学PCN & CAD中心北京100876

目前,基于信息与通信技术以及现代管理理念的现代服务行业迅速发展。现代服务业中用户通信需求的差异性以及通信接入方式的多样性,决定了支撑现代服务业发展的通信网络呈现为包含固定、移动多种接入方式在内的异构形态。用户对通信业务... 详细信息

目前,基于信息与通信技术以及现代管理理念的现代服务行业迅速发展。现代服务业中用户通信需求的差异性以及通信接入方式的多样性,决定了支撑现代服务业发展的通信网络呈现为包含固定、移动多种接入方式在内的异构形态。用户对通信业务的连续性以及服务体验的一致性要求,对复杂的异构通信网络中的切换机制提出了挑战。文中研究并提出了一种适用于异构网络的,以用户为中心的语音业务系统的实现方法。该系统可根据终端及网络信息选择合理的终端进行最好的网络接入,并以智能切换保持语音业务的连续性和一致性。

关键词：现代服务业异构网络智能切换

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分布式InSAR系统技术综述

上海航天 2011年第4期28卷 38-46,66页

作者：李威李春升时信华郝晓龙上海卫星工程研究所上海200240 北京航空航天大学电子信息工程学院北京100191 北京跟踪与通信技术研究所北京100094

概述分布式卫星干涉合成孔径雷达(InSAR)系统的定义、组成、工作体制、应用领域及特点。综述了4个典型的分布式卫星InSAR系统发展现状,分析了总体技术、编队控制、三同步和基线测量四项系统关键技术。讨论了分布式卫星InSAR系统的高分... 详细信息

概述分布式卫星干涉合成孔径雷达(InSAR)系统的定义、组成、工作体制、应用领域及特点。综述了4个典型的分布式卫星InSAR系统发展现状,分析了总体技术、编队控制、三同步和基线测量四项系统关键技术。讨论了分布式卫星InSAR系统的高分辨率与宽观测带、实时与准实时和多功能发展方向。针对可实现高分辨率与宽观测带的多通道技术,分析了相位中心个数与重频的关系,并以一发三收模式为例,设计分辨率1 m、观测带宽度30 km波位参数,并分析总结其技术难点。针对有望实现实时与准实时监视的中、高轨InSAR系统,分析了处理器带宽、合成孔径时间、天线尺寸、峰值功率和基线等参数与轨道高度的相互关系。以轨道高度30 000 km为例,设计分辨率5 m、覆盖范围600 km波位参数,分析并总结了系统的关键技术。

关键词：分布式卫星InSAR系统多通道高轨SAR