矿山个人双向信息传输系统设计与实现

 针对煤矿工人下井后难以了解所处环境安全性的问题,提出了一种基于矿山个人双向信息终端的解决方案。介绍了基于Wi-Fi的矿山个人双向信息传输系统结构与功能,以低功耗GS1011智能芯片为核心,设计并实现智能矿灯嵌入式个人信息终端,分析了双向信息终端的工作原理,设计并实现了智能终端的实时定位算法,利用智能终端技术与三维井巷建模技术构建了煤矿三维虚拟现实系统。系统主要功能为主动感知周围安全环境、与地面及其他矿工信息交流、对矿工进行实时定位跟踪管理。本系统应用于徐州夹河煤矿物联网示范工程,取得良好效果。     

基于NB-IoT技术的物联网网关多协议转换研究

为了提高物联网网关多协议转换的稳定性,提出基于NB-IoT技术的物联网网关多协议转换技术.在构建物联网路由节点定位模型的基础上,采用高效可靠的机会网络路由分布设计方法,设计物联网网关多协议传输的邻阶均衡控制模型.然后进行网关多协议调节,通过节点自适应定位构建分簇节点部署模型规则.基于此,采用NB-IoT技术实现对物联网...     

邻居发现辅助与物联网整合应用

随着网络技术的发展,接入网络的设备已不再局限于由人操控的计算机,在物联网技术极大的丰富物理信息世界的同时,拓扑的动态性也带来了与传统网络不同的移动性问题。如何对节点进行高效的定位和数据传输成为需要解决的问题。笔者结合IPv6本身对移动性的支持和邻居发现机制,提出了一种使用邻居发现机制的移动节点辅助连接方法,并拟定了在6LowPAN中的实现方案,使6LowPAN与传感器、射频识别和控制终端等结合,实现局域物联网内以IPv6方式连接,满足小范围移动切换需求,通过IPv6接入Dragon-Lab联邦网络,实现全IPv6的物联网应用模型。     

国产“麒麟”操作系统成功应用于卫星定位智能终端和桌面终端

正9月25日,湖南省科技厅组织专家对湖南湘邮科技股份有限公司承担的省承接国家科技重大专项成果转化专项"基于国产‘麒麟’操作系统的卫星定位智能终端和桌面终端产业化"项目进行了综合验收,项目实施取得了较好的经济和社会效益。项目运用"国产‘麒麟’嵌入式操作系统、桌面操作系统以及国产北斗卫星导航技术",实现了基于国产"麒麟"操作系统的卫星定位智能终端和桌面终端的产业化,解决了终端产品应用国     

基于蓝牙技术的可穿戴式智能环境参数采集系统

提出了一种基于蓝牙技术的无线可穿戴式环境参数获取系统,其采用智能手持终端(例如手机),实现了将个人用户周边环境信息的实时采集,融合了可穿戴式传感器、物联网技术以及智能终端等技术。系统集成了多种传感器,可检测温湿度、光照、气压、PM2.5等。另外,该系统很容易通过增加传感器种类和数目实现扩展,还可以与其他系统通过广域网进行无线组网,实现一个大型环境参数监测无线传感器网络,将会在环境监测、天气、自然灾害预警方面得到广泛发展。     

基于物联网的敬老院环境监测系统的设计

提出了一种基于物联网的敬老院环境监控系统。该系统由众多的终端节点、路由节点以及汇聚节点组成无线传感器网络。终端节点作为监测节点采集并处理环境数据,并通过无线传感器网络将数据传至网关节点,网关节点将数据传至互联网以及监控中心,这样就能实现对敬老院的环境进行监测。     

浅谈物联网的组网技术与应用

物联网是指通过射频识别（RFID）、红外感应器、全球定位系统、激光扫描器等信息传感设备,按约定的协议,把任何物品与互联网连接起来,进行信息交换和通讯,以实现智能化识别、定位、跟踪、监控和管理的一种网络,即＂物物相连的互联网＂。物联网的关键技术是RFID电子标签技术,移动支付作为物联网的一个分支也称为手机支付,就是允许用户使用其移动终端（通常是手机）对所消费的商品或服务进行账务支付的一种服务方式。     

基于物联网的智能家居监控系统设计与实现

随着物联网、移动通信、互联网+等技术的快速发展及应用,时尚、便捷与智能的家居生活体验已不再是幻想,文章主要论述移动智能家居远程监控系统的设计与实现.系统终端节点采用CC2530与Zigbee技术进行数据采集与控制,网关上采用WIFI模块进行网络通信,智能终端监控以Android系统为平台.实现了远程移动的温度、湿度的数据采集、可燃气体检测与报警、人体感应,模拟了窗帘、门等设备的控制功能与状态检测,系统测试稳定.该系统具有很强的扩展性、移植性,可以拓展应用到宾馆、超市、工厂等场所,具有较高的应用价值.     

移动GIS定位关键技术研究

随着移动智能终端的发展,GIS呈现出由桌面化向移动终端发展的趋势,移动定位具有了广阔的市场。但是目前的定位技术对于室内等非开阔地带的定位具有极大的局限性。探讨了智能手机终端的定位原理和各自的特点。分析了室内定位面临的问题。     

传感网络终端时钟同步的目标定位模型分析

由于传统目标定位模型分析会增加目标定位时延,为了缩小目标定位时延,提出了传感网络终端时钟同步的目标定位模型分析。通过传感网络终端的仿真计算,分析了时钟同步的目标状态,在选取合适的模拟方法基础上,确定了目标节点位置与定位系数之间的关系,设计了传感网络终端时钟同步的模拟过程,完成传感网络终端的时钟同步模拟;在模拟后的传感网络终端时钟同步中设置目标采集指令,由路由器将目标采集指令转发,为了确保传感网络终端节点进入待采集状态的准时性,计算了目标的采集时间,采集时间确定后,协调器还要将等待接收反馈目标的时间上传到传感网络终端,完成传感网络终端时钟同步的目标采集;最后通过时钟同步目标定位模型的构建,实现了传感网络终端时钟同步的目标定位。仿真实验结果显示,提出的目标定位模型分析可以缩短目标定位时延。     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

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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