酒后驾驶与超速行驶智能监测系统设计

针对驾驶员酒后驾车和车辆超速行驶两大道路交通事故频发的重要因素,开发了一套集多传感器数据采集、GPRS远程无线数传、GPS定位、上位机无线数据接收的酒后驾驶与超速行驶智能监测系统.该系统通过酒精、指纹传感器采集到驾驶员的酒精含量和指纹数据;通过GPS获得行驶车辆的速度与位置,经GPRS模块通过无线网络与上位机进行通信.上位机接收到数据后,将其在数据库中进行动态存取,可以同时实现酒后驾驶与超速行驶两种情况的实时监测.     

基于ZigBee的无线温湿度采集系统设计

基于ZigBee技术设计了一套无线温湿度采集系统.将该系统部署到环境中,节点自发组网通信,终端采集节点可将环境的温湿度数据发送给协调器汇聚,再通过串口发送给上位机实时显示;协调器搭配联网模块可以连接云平台,客户端小程序订阅相关主题后也可以接收到协调器上报的数据,并查看到数据的变化趋势.该系统不仅能应用于家庭环境监测,还可以应用于工农业生产中.     

基于ZigBee的无线温湿度采集系统设计

基于ZigBee技术设计了一套无线温湿度采集系统.将该系统部署到环境中，节点自发组网通信，终端采集节点可将环境的温湿度数据发送给协调器汇聚，再通过串口发送给上位机实时显示；协调器搭配联网模块可以连接云平台，客户端小程序订阅相关主题后也可以接收到协调器上报的数据，并查看到数据的变化趋势.该系统不仅能应用于家庭环境监测，还可以应用于工农业生产中.     

无线传感网络温室环境监测病害诊断系统的构建

采用低功耗单片机ATmega8、无线通信模块SZ05以及环境因子检测传感器构建了一个无线传感网络数据采集系统.基于ZigBee无线传输协议设计温室无线传感网络,实现了对温室温度、湿度、光照度、二氧化碳浓度及反映作物病害状况的声发射信号的采集,并将数据传送至上位机监控中心进行实时监测.基于LabVIEW8.6设计上位机监测界面,对采集到的数据进行存储、显示和分析.对番茄病害种类和防治方法进行分类,建立了数据库,根据声发射信号及环境因子的变化情况,即可诊断作物的病症,并给出相关的防治方法.     

多点无线温湿度实时监控系统的设计与实现

多点无线温湿度实时监控系统分为上位机和下位机两部分。下位机主要负责各监测点的温湿度数据的采集和处理以及本地显示．同时接收上位机的控制指令并根据指令的要求通过无线与上位机进行远程温湿度数据的交互。上位机实现数据的显示和管理。     

基于nRF905的油罐温度无线传输系统的设计

在石油化工控制、环境监测、现场监控等特定环境条件下,需要把采集到的温度信息通过无线方式上传到上位机。为此,设计了基于n RF905的温度数据无线传输系统。该系统采用数字温度传感器DS18B20采集指定地点的温度,并将采集到的温度信息传输到发送端单片机中,再传送至以n RF905为核心的无线数传模块,经无线传输模块处理后发送至接收端,接收端单片机通过串口将采集到的温度数据上传给上位机,上位机通过Labview对采集到的数据进行实时监测及报警。     

基于GPRS的危险货物仓储环境实时监测系统

研究一种危险货物仓储状态实时监测系统,实现相关环境参数采集、发送和分析,对各种危险隐患实现预警并报告监控中心. 根据危险货物的特性,运用传感技术实时采集参数,并通过现场LIN总线网络将环境参数数据汇集到具有GPRS无线传输功能的现场主模块. 现场主模块利用GPRS网络将数据无线传输到监测中心的上位机,上位机应用程序对环境参数数据进行处理、显示、存储. 监测中心值班人员通过上位机应用程序可以动态掌握危险货物的仓储环境状态,从而有效预防事故的发生.      

基于ESP32的无线数据采集系统设计

设计了一套以ESP32主控芯片为核心的无线数据采集系统.FreeRTOS操作系统平台下设计了系统程序,系统通过ESP32的SPI接口收集数据并进行缓存,同时连接指定Wifi网络,建立服务器,并通过socket建立与上位机(电脑)的通讯,将所收集数据传输给上位机.实验结果表明,所设计的基于ESP32的无线数据采集系统,能够与上位机系统保持稳定的网络通信,并实现将采集数据发送至上位机进行显示及存储.     

温度数据采集系统的设计与实现

本文基于AT89S52单片机设计了一温度数据采集系统,通过该系统实现了对温度数据的采集,实时的温度显示监测等功能.在硬件上采用单片机AT89S52作为主处理芯片,采用智能温度传感器DS18B20作为检测元件,通过温度传感器DS1SB20对温度数据进行采集,温度传感器DS18B20将被采集到的温度转化成带符号的数字信号并传送给单片机,同时将信号进行编码传送给上位机,上位机接收到数据,并对数据进行监测.     

基于蓝牙传输的脉搏信号检测系统的设计与实现

设计基于无线蓝牙传输的脉搏信号检测系统,系统包括PVDF脉搏传感器、信号调理电路、数据采集电路、蓝牙无线传输模块和上位机数据接收显示模块.实验结果表明,该系统能够对人体的脉搏信号进行实时采集,将数据通过蓝牙无线发送到由J2ME语言编程的手机中,接收到的脉搏信号可在手机上显示波形,并可进一步对信号进行处理,进而实现远程监护.     

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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