通用传感器接口电路（UTI）

一种通用传感器接口集成电路芯片-UTI。它具有集成度高、uP兼容、适用性强和自动校准等特点。UTI可为阻性、容性、电阻桥等物理量传感器和微处理器之间提供方便、可靠的接口功能。UTI采用三信号测量技术,可通过计算消除系统偏移及增益漂移造成的测量误差。     

基于嵌入式ARM9的农田数据采集仪的研究

数据采集仪采用S3C2440芯片为核心处理单元,外围扩展LCD接口、电源及复位电路接口和存储等接口,通过摄像头、空气温湿度传感器、光照度传感器和二氧化碳传感器实时采集农田中数据信息,并发布到嵌入式WEB服务器,用户可以在远程端通过浏览器浏览农田中实时动态数据,为管理者对农田作业提供依据.     

多总线接口无线传感器网络节点

为了实现异构无线传感器网络节点之间的互联通信,从总线设计的角度,提出一种多总线接口无线传感器网络节点的设计方案,以通用高速的USB和ethernet总线作为接口,在传感器节点上灵活挂载多种射频模块等设备,并配置相应的软件协议栈,实现软硬件即插即用的可异构化节点.以USB 2.0总线为例.将蓝牙通信模块挂载到传感器节点的母板模块.将传感器节点异构为具有蓝牙通信接口的无线传感器网络节点.设计结果表明:多总线接口无线传感器网络节点的通信速率不受总线速率制约,扩展性强于普通节点,便于实现支持异构的传感器节点和功能强大的传感器节点.     

自准水平激光仪定位系统的研究

介绍了激光仪的定位系统,并就工作原理、电解液传感器以及接口电路进行了剖析. 由理论分析和实验结果表明:激光仪利用电解液传感器和该接口电路进行自调水平,在半径R为300m的工作范围内,其精度优于±10mm.     

采用80C196KC智能控制工业缝纫机

本文介绍采用80C196KC微控器对工业缝纫机控制的设计实现.采用光电传感器、霍尔传感器等部件实现通道数据输入与输出功能采用Intel8279专用键盘/显示器接口芯片、LED数码管、接触式按键控制器实现人机接口.     

传感器接口电子技术的前景

在当今社会工业化向信息化转变的过程中,传感器及其测量系统提供信息的作用日趋明显。在不确定条件下,将各类传感器的原始信息转化为测量系统、控制系统、分析系统、监视系统等系统的可用信息是传感器接口的主要功能。传感器接口电子技术决定了使用该传感器的各类系统的功能,在国防、经济、农业、工业、社会服务等领域都发挥着巨大作用,有着集成化、微型化、多维化、智能化、网络化的前景。     

差动位移传感器的光电自动检定

介绍了一种由双纵模热稳频激光干涉仪、微机、被检传感器及数据采集A/D卡、微机接口数据采集卡、机械及电动机构、步进电机驱动卡等组成的差动式位移传感器自动检定系统的组成及原理.实验及实际应用证明了该检定系统具有良好的性能.     

无线传感器网络中间件技术

目前,面向应用的无线传感器网络普遍缺乏统一开放的软件体系架构和高效的开发接口,因而阻碍了其进一步发展和应用.针对无线传感器网络特点,全面介绍无线传感器网络中间件软件的概念、设计需求与关键技术,并在此基础上分析其体系结构.同时,提出无线多媒体传感器网络中间件的概念,并构建一种基于Agent的无线多媒体传感器网络中间件体系.     

基于WEB服务连接传感器网络和Internet

随着无线传感器网络的迅速发展和广泛应用,通过Internet连接传感器网络与其应用将面临新的挑战,同样面向服务结构的软件开发也面临新的问题.定义一套核心服务和一些辅助服务来集成传感器网络,使具有应用的传感器网络的接口作为WEB服务被封装,并通过服务注册和发布,利用HTTP被应用查询、定位和调用.     

基于PCI总线的光栅传感器位移测量系统设计与实现

针对通用的光栅传感器位移测量系统存在性能不稳定、抗干扰性不强等问题,介绍了一种基于PCI总线的光栅传感器位移测量系统的设计方法,系统采用CPLD对光栅传感器的信号进行处理,采用CH365完成PCI总线的接口电路设计.通过测试,系统的分辨率为0.1 um,精度为±1 um,性能指标达到了预定目标,该系统已经成功运用到某型号的坐标测量机中.     

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

正~~