基于多线程的异步串行通信及遥控解码的实现

在实际工程的开发中常常面临需要与外围数据源设备通信的问题，因此结合开发实践，通过一个基于Widnows98的具体应用程序实例，介绍了基于多线程的PC机与单片机之间的异步串行能信的实现方法及通用红外遥控器的解码方法，该系统是采用VisualC 语言及汇编语言实现的。     

一种基于数据库面向主题的IPC方法

分布式系统面临的一个关键问题是解决好进程间通信(IPC)协作.针对网络备份系统开发的实际需求,分析传统方式IPC方法的不足,提出基于数据库面向主题的进程间通信方法,解决备份系统中进程间通信协作问题.该方法中数据库负责消息的存储、管理和应用程序之间的通信;主题是应用程序之间通信所操作的实体,关于主题的信息存储在数据库中;多个应用程序连接到数据库,通过关联相同主题实现通信和资源共享.     

机井计算机监测控制系统的理论与实践——华北半干旱偏旱井灌区及旱作区节水农业综合技术

为了最大限度地合理利用地下资源,提高农业水利工程的管理水平,研究并开发了机井计算机监测控制系统,该系统基于Windows操作系统,组态软件与商用数据库,利用现代通信技术,实现了泵系统重要参数的实时监测,远程通信,实时显示,以及对泵系统的远程控制和优化调节等重要功能,实现了更好地监控供水系统安全运行,达到灌区机井自动化监控的目的。     

投递确认自动反馈系统的软硬件设计

基于无线通信技术和Internet网络通信技术，作者有机地将物品投递业务处理流程与网络通讯技术相结合，开发了投递确认自动反馈系统。详细介绍了其工作原理与物理实现过程，深入探讨了其实现方法和关键技术，详细描述了无线数据通讯的软硬件的实现方法。     

基于以太网的数据采集及监控系统的数据通信研究

介绍了基于以太网的数据采集及监控系统的网络构成，提出了使用传输控制协议(TCP)的点对点通信方式与传统的WEB方式相结合的混合型通信方案，讨论了该通信方案实现的关键技术，并简要介绍了通信软件的开发，实验证明该方案数据传输可靠、实时性好，可行性高。     

用VC实现基于LIN总线协议的串口通信

分析了LIN总线协议的特点、报文帧结构及校验方法，以Visual C^＋＋ 6．0为开发平台,利用Windows API函数通过PC机的RS232口实现了基于LIN总线协议的串口通信．给出了实现的部分流程图及代码，在通信过程中选择简便的奇偶校验及和校验进行差错校验，保证了数据的无差错传输．     

基于VB环境下开发远程无线监控系统

以地下水位数据采集与传输系统进行数据传输为例，介绍了基于VB6．0开发环境的串行通信系统设计，特别是对手机短消息通信方法的设计与实现进行了阐述。本程序设计方法具备一定的通用性，可广泛应用于其他计算机监控系统的设计。     

Authorware与外部数据库的通信

Authorware是由MacroMedia公司研制的，面向对象且基于图标和流程线的一种多媒体开发平台，具有丰富的函数和加大的程序控制功能，长期以来Authorware与外部数据库接口问题一直是个遗憾，就此本文分析了Authorware与数据库通信的标准，提出了与数据库通信的实现方法。     

NIOS系统与计算机串口通信的实现

介绍了串口通信标准,提出了基于NIOS Ⅱ嵌入式软核处理器的串口通信设计方案,重点研究NIOS系统的串口与计算机串口通信的实现,阐述了在NIOS Ⅱ集成开发环境下串口通信的软件实现及上位机上软件的实现．     

基于STM32处理器的两种USB通信方法的实现

本文通过解析USB通信协议及其CDC（Communications Device Class）USB标准设备类，在意法半导体推出的基于ARM公司的Cortex—M架构设计的STM32处理器上设计了一套基于CDC标准设备类的USB通信协议，然后在PC主机上利用微软提供的usbser．sys驱动程序，自己编写了一个stmcdc．inf文件，实现了STM32处理器和PC主机的基于CDC标准设备类的通信。随后又在STM32处理器上设计了一个基于自己通信特点的半双工bulk通信，在PC主机上开发了一个Windows驱动程序dwusb．sys，并编写了一个dwusbinf文件，最终实现了基于自己通信特点的USB通信协议的实现。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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