RFID技术在实验室管理系统中的应用研究

基于RFID技术的开放实验室管理系统是射频无线感应技术和计算机数据库技术相结合的典型应用,可以实现实验室门禁控制、设备电源控制和实验管理的自动化．本文设计了基于RFID技术的实验室管理系统,通过在每个实验室配置读卡器和检测系统,实现实验室的无人值守,全天候开放式管理．     

气田安全信息实时无线监控系统的开发及应用

"气田安全信息实时无线监控系统"利用中国石化股份公司安全隐患整改项目开发而成,建立了集天然气泄漏检测报警、井口气源安全截断、现场数据采集及无线传输、远程信息监控为一体的安全信息实时无线监控系统.该系统利用集成技术,将传统的安全检测及控制系统进行基于无线移动GSM/GPRS网络的USSD技术的二次开发,实现了数据的现场采集及远程无线传输功能,并利用宽带网络技术实现了对安全监控信息的实时管理.     

基于GSM的室内无线传感器网络簇头节点

为了实现温室环境信息低功耗、低时延高效无线检测与控制,构建了三层次室内无线传感器网络系统,研制了在网络系统中较关键的具有远程和短距离无线通信功能的网络簇头节点.采用短距离无线通信CC2430模块和全球移动通信系统(GSM)GPRS模块设计网络簇头节点,并利用GSM网络内嵌的TCP/IP协议,设计基于Zigbee技术的无线收发功能程序和GSM网络传输控制功能程序.网络系统试运行表明,网络管理计算机可以随时获取被监测的温室温度等环境信息,与一般无线传感器网络相比,信息传输能耗低、时延小响应快,实现了无线传感器节点和远程管理计算机之间的信息高效无线传输.     

物联网智能安防系统设计

本文基于2.4G无线技术、GSM和传感器技术设计了物联网智能安防系统。该系统实现了安防系统与互联网的一体化集成,建立无线网络来实现个传感器信息的无线传输和整合,通过GSM和互联网两个渠道实现安防信息的传达。通过实验验证了设计的可行性,在家庭安防领域中推广,具有较好的应用前景。     

基于ZigBee技术的电能消耗监控系统设计

基于ZigBee无线传感器网络技术提出了实验室电能消耗监控系统的设计方案。重点阐述了两种电能检测芯片（ATT702IB和ATT7022C）同CC2431片上系统的硬件接口电路。井针对实验室的分布情况给出了网络拓扑方式和信息传输方式。     

监测PCB电镀电流的无线传感器网络

利用计算机、传感器技术和无线通信,设计了用于PCB电镀电流检测的无线传感器网络监测系统.该监控系统以NRF9E5单片机为无线传感器节点核心,运用霍尔电流传感器和检测电路的设计,实现了无线传感器节点与计算机的无线通信.     

融合GPRS技术的ZigBee无线网络水质监测系统的设计

利用基于ZigBee技术的无线传感器网络和SOC片上系统,设计了基于无线传感器网络的远程水质监控系统．系统融合ZigBee技术和GPRS无线通信技术,结合GPS定位技术,并利用GPRS与Internet的对接技术,实现了地下水质检测数据的远程传输和监测的目的．     

化学化工实验室无线安全监测系统故障诊断方法研究

针对化学化工实验室的安全问题设计了一种无线安全监测系统,通过无线通信模块传输现场检测数据和经压缩后的图片,实现了实验室安全远程无线监测与监视的功能. 由于监测系统中的无线通信模块能耗较高,长期运行容易发生故障,其故障检测方式也较为复杂. 为了在线检测无线通信模块的故障和识别其类型,以确保无线安全监测系统的可靠性,研究了无线通信模块的电流特性,建立了基于模糊神经网络的故障诊断模型,可实现对无线通信模块在不同状态下的故障进行诊断. 实验结果表明,与BP神经网相比,采用模糊神经网络的无线通信模块故障诊断方法训练耗时短、收敛快、训练误差和验证误差小、诊断正确率高,能够在线检测无线通信模块的多种类型故障,明显提高了无线安全监测系统的可靠性,具有较好的实际应用价值.      

气田现场数据采集及无线传输远程监控系统研究

实现安全生产管理的信息化，建设一个功能强大、技术先进、高可靠性、高容错性、性价比高的无线信息平台是实现天然气生产安全管理信息化最重要的基础．该系统利用集成技术，将传统的安全检测及控制系统进行基于无线移动GSM，GPRS网络的USSD技术的二次开发，实现了数据的现场采集及远程无线传输功能，并利用宽带网络技术实现了对安全监控信息的实时管理。     

基于GSM技术的温度报警系统的设计与实现

利用ARMCortex-M3的32位低功耗的STM32处理器以及先进的GSM技术,设计了无线远程温度报警系统,采用DSl8820温度传感器和SIM900A无线传输模块实现了温度采集和信息传输的功能。     

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.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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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