用自由口模式实现S7—2OO系列PLC与IPC的通讯

介绍了如何用自由口模式实现西门子公司的S7—200系列PLC与上位机的通讯，给出了一种简单的用户自定义协议，着重介绍了上，下位机之间具体通讯过程的实现，并给出了部分程序和流程图。该方案具有硬件简单、使用灵活的特点，对中小型控制系统实现通讯有一定的参考价值。     

Visual Basic在系统机和前端机群间串行通讯中的应用

利用VB中的通讯控作MSCOMM实现系统机和前端单片机群之间的串行通讯,探讨了上位机和下位机数据传输格式的统一问题,并以一化工厂液位测控系统上、下位机之间串行通讯为例给出了相关程序。     

计算机之间的远程串口数据通讯

本文对如何通过电话线实现计算机之间的远程串口数据通讯作了较为详细的论述 ,并给出了用 VisualBasic 6 .0的 MSCom m通讯控件实现计算机间远程通讯的方法和一个简单程序实例     

三菱FX2n系列PLC与上位机的几种通讯方式研究

本文阐述三菱FX2n系列PLC与上位机进行通讯的几种常用方式,并以一供热中心锅炉房的控制系统为实例,用F940触摸屏实现了系统通讯。运行结果表明,此方法简单、可靠、效率高。     

经济型数控车床与PC机通讯的二次开发

本文以CK0630经济型数控车床与PC机通讯的二次开发为实例,介绍了一种借助仿真机开发经济型数控机床与PC机之间进行数据通讯的方法。使用户能够根据自己的数控机床的特点,方便地开发出数控机床与PC机的通讯功能,从而提高了数控加工编程的质量和效率,是一种在现有的数控机床上开发其与PC机通讯的经济、实用、行之有效的方法。     

单片机在地热综合利用中的应用

本文以单片机实现对地热温室分布式控制为例,说明地热综合利用中应用单片机的方法。该系统包括一个主机和多个从机,主—从机间采用串行通讯。主机负责地热点的检测和管理,从机完成现场的数据采集和控制。文中介绍的方法也适用于粮仓、冷库和一般温室。     

基于支持向量机的文本分类研究

本文介绍了基于支持向量机（SVMs）的文本分类基本原理、方法，并给出实现的例子。     

基于VB和CAN总线的分布式监控系统设计

详细介绍了基于VB和CAN总线的分布式监控系统的逻辑结构,给出了上位机与主控单片机之间通信的方法,并制定出相应的通信协议,实现了在CAN总线中利用广播技术控制各节点同步数据采集,并对各节点数据采集的同步精度进行了简要地分析。该系统具有结构简单、易于扩展等诸多优点。经现场实际运行,该系统运行可靠,可广泛地应用于各种需要同步数据采集的分布式监控系统当中。     

浅谈PKS系统在神华包头煤制烯烃项目热电站的应用

简单介绍了神华包头煤制烯烃项目热电站应用的霍尼韦尔公司的DCS作为生产过程集散控制系统的系统结构,DCS系统的配置原则和方式以及各系统间的集成。另外还简单介绍了PKS系统与第三方设备通讯的应用等。     

睡眠呼吸分析系统的串行通信

对利用C++Builder实现睡眠呼吸分析系统的串行通信方法进行了较为详细的阐述和分析,重点介绍了C++Builder中通信控件MSComm的功能特点、常用属性设置,并给出了睡眠呼吸分析系统中PC机与单片机血氧饱和度模块间串行通信的实现方法。     

Communicating firm competencies: Marketing as different levels of translation

Recently, the notion of competence-based marketing and communication has been discussed as a way to avoid competing on price and to increase imitation barriers. This paper contributes to the discussion with the development of a model of firm capabilities and an understanding of when to use competence-based communication. It is argued that all market communication is competence-based but the content of communication and the marketing capability changes along the different waves of market orientation. Therewith, marketing is seen as translating firm competencies into customer language.     

异构网络环境中点对点通信架构研究

基于协议分层和IP思想,设计了一种在异构网络环境下点对点通信的架构。首先描述了异构网络环境的通信特点,提出了软件的设计思路和软件架构,并结合实例对通信过程进行了分析。经测试,可以在简单的异构网络环境下实现点到点通信,更复杂的网络环境也可以在此架构上进行设计开发。     

The politics of public safety communication interoperability regulation

This article examines an understudied area of telecommunication policy, namely the regulation of public safety radio communication to bring about communication interoperability. Commonality and funding are the two intertwined policy challenges need to be overcome to achieve this interoperability. Addressing these challenges separately, US federal policy has struggled to establish communication interoperability. By contrast, the integrated approach of the Europeans has resulted in a relatively successful outcome. It is argued that this integrated approach may even permit the transplantation of a more general telecommunication policy thread—competition—to the public safety radio communication field. However, whether interoperability is established may also be linked to intra-agency fears of a potential re-direction of hierarchical communication flows brought about by new (and configurable) communication infrastructure. If this is the case, policy-makers regulating for interoperability will need to take into account inter- and intra-agency organizational dynamics as well.     

Strategic intelligence activity: The management of the sales force as a source of strategic information

Environmental information is very important to strategic management. Human sources are among the most commonly used sources of information and among them, boundary people, such as salesman, hold a privileged position. One dimension which measures the quality of a strategic response is its speed of implementation. Recognizing this, to ensure a good (fast) strategic response, fast communication of information is imperative. This article focuses on factors which influence the speed of communication of environmental information. It is based on an exploratory research which has been carried out on a sample of salesmen of an industrial company. Management policies regarding the use of the sales force as an efficient source of strategic information are proposed in conclusion.     

Stochastic market sharing, partial communication and collusion

This paper analyzes the role of communication between firms in an infinitely repeated Bertrand game in which firms receive private signals of a common value i.i.d. demand shock. It is shown that firms can use stochastic, inter-temporal market sharing as a substitute for communication in low demand states. Partial communication in high demand states is sufficient to achieve the most collusive, full communication outcome and strictly dominates partial communication in low demand states. Communication in high demand states allows firms to coordinate their pricing, choose the most efficient uninformed price and avoid price wars. I demonstrate that under some conditions consumers are better off with communication among colluding firms.     

国际交流合作课程新形式探讨——服装产品开发项目教学实录

中美两所院校的"服装产品开发课程",以六组不同种类的服装产品设计课题通过用远程网络视频教学与互访教学相结合的形式进行,通过网络沟通、调研与设计制作以及最后的中美互访,打破了传统的服装教学界限,这种"低成本高互动"的交流方式,拓宽了国际课程交流渠道,发展了学生的学习空间,增强了服装教学的实践应用能力,为设计教学院校的国际课程交流提供了一种参考模式。     

Evolving communication patterns in response to an acquisition event

This study uses network data of worker behavior to analyze changes in worker communication patterns during the first three years post‐acquisition. The findings suggest that new communication routines develop slowly and are not entirely enduring even when a transformative event, such as an acquisition, occurs. Communication across firms initially increases as workers change their routines. However, over time this communication peaks and then falls as workers develop common ground. Communication across firms was greater when workers' tasks were interdependent. Overall, this study demonstrates that communication routines persist even after an organizationally transforming event. It illustrates the importance of both the formal and informal organization as well as the promise of using social network methods and communication log data to study social phenomena of strategic interest. Copyright © 2011 John Wiley & Sons, Ltd.     

大型LED显示系统的设计与研制

绍了一种由单片机组成的大型ＬＥＤ显示系统的功能特点、硬件结构和软件框图。该系统由主单片机ＣＰＵ完成与ＰＣ机的通讯,同时完成数据存储、动画处理、循环显示等,由辅单片机ＣＰＵ完成显示画面的刷新。该系统能脱机和连续长期运行,具有结构简单、显示刷新速度快、成本低等特点。     

A DOMSAT for Australia: Communications planning under strain

The events leading up to the announcements of a domestic communication satellite for Australia are outlined. The implications of the satellite decision are discussed in relation to planning for the communications infrastructure as a whole. It is suggested that the communication satellite debate has revealed weaknesses in the existing policy planning process and that these will be exacerbated by the satellite decision unless appropriate strategies are developed.