应用并行I/O对象实现协议转换

介绍了LonWorks现场总线,LonWorks节点,以及并行I/O对象,并基于此给出了RS-232通信协议与LonWorks通信协议之间的转换     

LonWorks现场总线的分析与应用

本文简要地介绍了LonWorks现场总线技术的概况和优点;深入地论述了LonWorks网络的主要组成元件和网格的构成;并构建了一个基于LonWorks现场总线技术的生活小区楼宇自动化系统。     

LonWorks技术在电梯控制系统中的应用方案

LonWorks作为一个开放式、互可操作性的控制网络平台，是现场总线技术中的佼佼者，已经成为楼宇自动化系统的基本规范。本文提出一种基于LonWorks总线技术的电梯控制系统方案，重点介绍LonWorks在电梯控制系统中应用的关键技术。     

LonWorks现场总线及其应用

首先阐述了LonWorks现场总线的基本内容,分析了其芯片、NeuronC语言、LonTalk协议、节点、收发器和LonBuilder及NodeBuilder开发工具等,接着讨论了LonWorks现场总线在智能小区等方面的应用,最后分析了LonWorks现场总线发展趋势。     

LonWorks现场总线的发展状况

LonWorks网络控制技术是一种新型的现场总线技术.LonWorks总线作为当前最为流行的现场总线之一在楼宇、运输、能源等领域得到广泛应用.本文介绍了LonWorks控制总线的系统构成、工作原理和目前的发展状况.     

基于LonWorks现场总线的温度测量仪设计

针对目前国内大部分温度监控系统集成度较底,规范性较差,没有统一标准等问题,提出了LonWorks现场总线控制系统来实现温度的测量,该系统将系统的分散转化为现场控制.介绍了LonWorks现场总线及其特点,设计了基于LonWorks现场总线的、采用8051单片机和Neuron芯片3150的温度测量节点,并分析了该智能节点的优点,最后指出使用单总线数字温度传感器DS18B20可完美实现LonWorks温度测量.     

LonWorks及其在工业控制中的应用

介绍了现场总线LonWorks的体系结构和LonWorks的神经元芯片。通过一个过程控制中的实例，介绍了如何对其进行现场总线网络控制。     

LonWorks飞行数据采集系统的网络通信

LonWorks现场总线一般用于对传送速度和数据量要求不高的场合。文章提出了尽量增加数据报文长度和采用令牌管理节点的方法,有效地提高了LonWorks的网络吞吐量。在基于LonWorks的飞行数据采集系统中,采用了该方法来采集、处理飞行器在飞行过程中的高速、大批量的数据,取得了良好的效果。     

基于现场总线的干粉配料柔性控制系统

阐述了应用LonWorks现场总线实现干粉预制砂浆与配料控制的原理及方法，采用LonWorks构成的配料控制系统、互操作性好，结构简单可靠，配比调整方便。     

基于LonWorks技术的智能节点的设计

介绍了智能节点在LonWorks现场总线控制系统中的重要性,给出了智能控制节点的设计和开发方法，以及采用该智能节点组建的基于LonWorks技术的BAS系统应用实例．     

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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