WSN与GPRS结合的远程图像等数据采集系统设计

为了能够对远程现场图像等数据的实时获取,论文设计一种远程数据的采集系统.远程的数据采集节点是利用无线CC2530芯片控制摄像头和其它设备进行图像等数据的采集,采集的数据通过WSN(Wireless Sensor Network)发送至数据汇聚节点,再通过GPRS(General Packet Radio Service)传送到数据监控中心.数据监控中心完成数据的保存和信息的显示,同时还可以反向控制远程的数据采集节点.实验结果表明该系统能够很好地实现远程现场图像及其它数据的采集和传输,并有效地对远程的数据采集节点进行控制.     

基于ARM的图像监控系统的开发

设计了一种基于ARM和嵌入式Linux操作系统的图像监控系统。以S3C44B0X为核心,通过USB摄像头进行图像的采集,利用JPEG算法将摄像头采集的数据进行压缩编码,采用GPRS无线传输模块将压缩后的信息传输给远程的PC机,通过可视化软件Labview编写能恢复采集到的图像信息,将图像进行实时的显示和控制的上位机软件。本系统对于数据的采集不局限于固定的地点,并且利用无线传输成功的实现了远程的监控,具有很好的实用价值。     

一种基于多摄像头的大场景远程实时监控系统

为了满足对大场景进行监控的需求,设计了一种基于多摄像头的远程实时监控系统.系统主要由视频采集、网络传输、远程图像拼接与显示3个部分组成.视频采集部分以FPGA为处理器,通过控制TW2867视频解码芯片实现4路视频同时采集;网络传输部分通过控制千兆以太网收发芯片RTL8211EG,并采用UDP协议实现了视频数据到上位机的高速传输;上位机接收多摄像头数据后,使用OpenCV及GPU完成了图像的快速拼接和显示.采用千兆交换机构建了8个摄像头的大场景远程实时监控系统,测试结果表明:系统视频传输速率可达912 M B;初始化完成后,全景图像拼接时间只需0.38 s;视频刷新速度可以达到15帧/s.所设计的系统可以扩展连接更多的摄像头,满足了更大场景拼接的需求.     

基于Arduino和树莓派的智能搬运系统的设计与实现

系统以树莓派3B+开发板、Arduino开源电子平台作为硬件基础,设计通信协议,利用无线通信技术,将温湿度传感器采集的信息上传至云平台进行数据交互.用户可远程登录树莓派,从摄像头获取实时的视频图像数据.系统可自动收集锅炉蒸汽信息,实现智能搬运系统的集成和控制、远程监控等功能.设计的智能搬运系统具有稳定性高、搭建方便、易于推广的特点.     

基于ARM-Linux远程视频监控系统的设计

以COALL2440开发板为硬件平台, Linux操作系统为软件平台, 并用USB视频摄像头和无线网卡, 通过对系统内核的配置, 底层设备驱动程序的编写和上层应用程序的设计, 构建嵌入式视频采集与无线传输系统. 通过将采集到的视频图像进行远程无线数据传输的方法, 解决了视频图像只能在PC机上进行监控的局限, 使视频图像能
直观地显示在智能移动终端上, 从而提高监控系统的拓展性、 安全性与适用性.     

基于Intel Edison的嵌入式实时图像采集传输与录制系统设计

基于Yocto Linux的Intel Edison嵌入式开发工具,设计并开发了一套实时图像采集传输及录制系统.通过USB摄像头对图像进行采集,并将图像数据通过视频服务器MJPG-Streamer传输到外部移动设备上,同时通过Intel Edison开发工具调用OpenCV图像库对图像数据进行处理及保存.测试结果表明,系统具有良好的实时性、高分辨率、低成本及易于拓展升级等优点.     

基于ARM-Linux远程视频监控系统的设计

以COALL2440开发板为硬件平台,Linux操作系统为软件平台,并用USB视频摄像头和无线网卡,通过对系统内核的配置,底层设备驱动程序的编写和上层应用程序的设计,构建嵌入式视频采集与无线传输系统.通过将采集到的视频图像进行远程无线数据传输的方法,解决了视频图像只能在PC机上进行监控的局限,使视频图像能直观地显示在智能移动终端上,从而提高监控系统的拓展性、安全性与适用性.     

一种基于MATLAB的网络化控制系统设计方案

针对基于互联网的远程控制系统研究,给出一种采用MATLAB的网络化远程控制实验系统设计方案.系统结构包括本地可连接互联网的摄像头,基于MATLAB的远程控制器,本地控制终端和机器人等四部分.远程控制器基于MATLAB的Simulink和S-Function功能设计,能够从远程摄像头获取图像,完成控制方法运算,通过网络向控制终端发送控制命令.依据本文提出的设计方案,最终开发完成了基于MATLAB的远程控制器软件系统,该系统能够满足网络化远程控制系统研究的基本需求.     

远程多点无线数据传输在水厂中的应用

本论文阐述的远程多点无线数据传输系统是以PC机为中心控制,PLC数据采集模块DTU作为下位机通过无线数传模块进行通信.无线通信系统主要有建网快速、移动方便、省去布线烦恼等优点,借助互联网把分散远距离需要实时监测的数据,通过无线通讯技术传送到水厂调度中心的计算机界面,具有实时、高效、可靠、操作方便等特点.     

基于无线传感器网络的农田环境监测系统设计

实时、准确获取农田环境信息是实现农业精准化作业、智能化管理的基础,也是农业信息化建设中的一个重要环节.设计了一种基于无线传感器网络的农田环境信息监测系统,通过分布于田间的传感器节点采集作物生长环境参数,采用CC2530构建Zig Bee数据传输网络,利用嵌入式网关完成Zig Bee网络、Wi Fi网络和GPRS网络的信息交互,实现了农田环境信息的远程监测.测试结果表明,该系统组网方式灵活、数据监测准确、覆盖范围广,通信距离可达350 m左右,为农田环境远程监测提供了一种有效可行的解决方案.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has