Windows下利用VISUAL BASIC5.0实现微机与GPS-OEM板的串行通讯

本文介绍了ＧＰＳ－ＯＥＭ板的结构功能及通讯协议,通过ＶＢ５．０中的ＡｃｔｉｖｅＸ探件ＭＳＣＯＭＭＶＢＸ对微机串行通讯的操作,从而实现了Ｗｉｎｄｏｗｓ下的ＧＰＳ－ＯＥＭ板的卫星数据的读取。     

VB6.0实现串行通讯的两种方法

利用ＶＢ6.0的ＡｃｔｉｖｅＸ控件和ＷｉｎｄｏｗｓＡＰＩ函数,方便的实现ＷＩＮＤＯＷＳ环境下串行通讯接口,同时给出源程序供大家参考。1　ＶＢ的企业版串行通信控件ＭＳＣＯｍｍ.ＯＣＸ1.1　使用ＭＳＣＯｍｍ.ＯＣＸ控件从ＶＢ的工具箱(ＴｏｏｌＢｏｘ)中可以看到通信控制,它像一个电话的话筒,把这个控件移到ｆｏｒｍ上,即可用之来通讯;如果ＶＢ的工具箱中没有这个控件,右键单击ＶＢ的工具箱,选择部件,在弹出的对话框中选择ＭｉｃｒｏｓｏｆｔＣｏｍｍｃｏｎｔｒｏｌ6.0则将其加入ＶＢ的工具箱。ＶＢ的企业版串行通信控件ＭＳＣＯｍｍ32.…     

数据库系统与高级语言通讯

本文论述了关系数据库系统中的ＳＱＬ语言与高级语言间的通讯区的一般结构，并以ＯＲＡＣＬＥ和ＩＮＦＯＲＭＩＸ为例，对ＳＱＬＣＡ和ＳＱＬＤＡ进行了详尽的探讨。     

COMDEX China’97中国IT产业及市场国际化的里程碑

ＣＯＭＤＥＸＣｈｉｎａ’９７中国ＩＴ产业及市场国际化的里程碑由中国电子工业部、中国国家科学技术委员会、中国国际贸易促进委员会、ＳＯＦＴＢＡＮＫＣＯＭＤＥＸＩｎｃ．以及美国国际数据集团（ＩＤＧ）联合主办的ＣＯＭＤＥＸ／Ｃｈｉｎａ’９７将于１９９７年２月...     

Windows 95下利用Visual C~(++)实现微机与GPS-OEM板的串行通讯

介绍了ＧＰＳ－ＯＥＭ板的结构功能及通讯协议，利用ＶＣ５．０中的ＡｃｔｉｖｅＸ控件Ｍｉ－ｃｒｏｓｏｆｔＣｏｍｍｕｎｉｃａｔｉｏｎＣｏｎｔｒｏｌ５．０对微机串口进行通讯操作，实现了Ｗｉｎｄｏｗｓ９５下对ＧＰＳ－ＯＥＭ板卫星数据的读取。该通讯方法也可用于类似的工业场合。     

Open VMS AXP1.5版

Ｏｐｅｎ ＶＭＳ ＡＸＰ１．５版新增的能力包括：多种ＶＭＳ群集配置，支持对称多处理，ＤＥＣｄｔｍ服务以及加强型批／打印服务。Ｏｐｅｎ ＶＭＳ ＶＡＸ和Ｏｐｅｎ ＶＭＳ ＡＸＰ系统现在能并存于群集配置中，从而提供优越的投资保障。     

A COUNTER－EXAMPLE TO A FAST ALGORITHM FOR FINDING THE CONVEX HULL OF A SIMPLE POLYGON

ＡＣＯＵＮＴＥＲ－ＥＸＡＭＰＬＥＴＯＡＦＡＳＴＡＬＧＯＲＩＴＨＭＦＯＲＦＩＮＤＩＮＧＴＨＥＣＯＮＶＥＸＨＵＬＬＯＦＡＳＩＭＰＬＥＰＯＬＹＧＯＮＧｏｄｆｒｉｅｄＴｏｕｓｓａｉｎｔＡＣＯＵＮＴＥＲ－ＥＸＡＭＰＬＥＴＯＡＦＡＳＴＡＬＧＯＲＩＴＨＭＦＯＲＦＩ...     

油料发放计量系统的数据采集与处理

介绍了为常州市石油总公司研制 料发放计量系统,叙述了系统的软硬件实现方案,该系统在Ｗｉｎｄｏｗｓ９５、ＷｉｎｄｏｗｓＮＴ平台上,使用ＶＦＰ６开发工具,利用ＭＳＣＯＭＭ３２．ＯＣＸ控件,采用轮询和事件相组合的方式实现上下位机的双串行端口通讯,解决了字符串长度大于１０２４Ｋ的数据传输问题,实现数据采集与管理同步。     

无盘工作站启动文件NET＄DOS.SYS的建立方法

无盘工作站启动文件ＮＥＴ＄ＤＯＳ．ＳＹＳ的建立方法黑龙江肇东市水利职工中专（１５１１００）王智慧周英华无盘工作站没有任何盘，不能象有盘工作站那样引导ＤＯＳ和运行ＩＰＸ．ＣＯＭ、ＮＥＴＸ．ＥＸＥ来启动工作站。无盘工作站的启动除在网卡上装有启动ＲＯＭ外，...     

AlphaAXP层次软件产品

本文介绍了可以在ＯｐｅｎＶＭＳ ＡＸＰ和ＤＥＣ ＯＳＴ／Ｉ １．２版的系统中实现的各种层次软件的应用，Ａｌｐｈａ ＡＸＰ系统上完整的ＣＯＨＥＳＩＯＮ软件开发环境；用于建立数据密集应用的全套数据产品。     

Is communication competence still good for interpersonal media?: Mobile phone and instant messenger

The concept of communication competence has developed in the area of nonmediated interpersonal communication. With the advent of digital media, interpersonal communication has been heavily dependent on interpersonal media. The sharp distinction between theories for nonmediated communication and mediated communication is disappearing. The interconnectedness of face-to-face communication and mediated interpersonal communication is a salient current phenomenon. To explore the relation between two communication types this study investigated the relevance of the concept of communication competence with the interpersonal digital media; mobile phone, SMS, and instant messenger. Three facets were examined in particular: namely, the direct effects of communication competence and the indirect effects through individuals’ cognitive process for interpersonal media and individuals’ characteristics in interpersonal communication. The hypothesized model of mediated interpersonal communication competence was analyzed using structural equation model. The results revealed that communication competence was positively associated with mediated interpersonal communication competence. The indirect effects of communication competence through media efficacy and social presence were empirically supported. Relationship maintenance was found to mediate the effect of communication competence on mediated interpersonal communication competence. The links of two different communication fields and the theoretical implications of the findings were further discussed.     

基于RFID技术的停车场通讯系统的设计

提出红外通讯与无线通讯结合在停车场通讯系统中,为了克服目前停车场通讯系统中,相邻车道之问无线通讯的相互干扰,该通讯系统引进具有方向性特点的红外通讯;设计了功率可控红外发射电路,从而达到停车场通讯系统中车道口的通讯距离可调,采用射频识别技术中的导出密钥的相互鉴别实现数据安全;通过局域网完成各车道口之间以及各车道口与管理中心的信息交换,实现停车场管理的网络化和信息化;实际证明,该通讯系统具有实际的应用价值。     

煤矿绿色无线通信关键技术探讨

从透地通信、感应通信、漏泄通信、小灵通通信、WiFi通信及3G通信等煤矿无线通信技术的现状出发,分析了现有煤矿无线通信技术存在的问题;结合绿色无线通信的概念和特点,详细介绍了煤矿无线通信网络能效分析、煤矿绿色无线通信标准建立、高能效覆盖方法设计、无线网络协作通信技术及高能效实时传输技术等煤矿绿色无线通信的关键技术。     

连续运输系统串行通信网络性能研究

介绍了原有的连续运输系统串行通信网络结构及主站通信流程,指出原有通信网络中存在总线通信效率低、从站的通信故障可能导致整个网络瘫痪的问题,提出了一种改进的连续运输系统串行通信网络。改进的通信网络将原有通信网络分成2个并行的通信网络,通过减少通信访问量、提高波特率、改变通信差错控制方式等方法,有效解决了各种通信矛盾。实际应用表明,改进的通信网络运行可靠、响应及时,提升了连续运输系统的可靠性。     

Group processes in solving two problems: Face-to-face and computer-mediated communication

In this study, an experiment on communication and problem solving in face-to-face communication and computermediated communication was conducted. The latter was performed in two variants; subjects writing under their own name or subjects writing anonymously. The problems were a Social Dilemma problem and a Criminal Puzzle problem. The theoretical starting point was if, and how, the communication form influences social relations, communication equality and communication processes. A qualitative analysis showed that different problems were related to different patterns of the variables studied. The computer-mediated communication solving the Criminal Puzzle problem induced relatively greater idea generation that was not responded to, while the face-toface communication was associated with relatively more answers. In the Social Dilemma, feedback was relatively more common in face-to-face communication than in computermediated communication. To 'give information about the game' was relatively more common in the anonymous computer-mediated communication than face-to-face situation, indicating that computer-mediated communication is associated with speaker generation of information, but less with responses to the interlocutor. There were no outcome differences or communication equality effects related to communication condition. These results point to the importance of the task related activities in the discussions rather than the importance of medium.     

多电飞机BPCU自动测试平台总线通讯技术研究

针对多电飞机BPCU自动测试平台的开发,研究了通讯网络的整体布局与设计方案。首先分析了BPCU通讯网络使用的AFDX总线以及计算机端系统之间通讯使用的以太网技术,其次根据BPCU测试平台的整体架构设计了通讯网络以及通讯方案,采用多线程同步通讯的手段,保证了通讯系统的高效稳定。采用VC++开发环境编写了C语言程序实现了整体的通讯功能,最后通过实验验证了通讯网络的可行性。     

基于数据分发服务的语音通信系统的设计与实现

针对大型试验场所试验过程中通信位置灵活分散、通信节点多的特点,满足人员分组通信互不干扰、通信状态可控、通信内容保密的需求,设计并实现了一种基于数据分发服务(Data Distribution Serv-ice,DDS)的语音通信系统.设计通信控制台对分组通信与动态登陆过程进行管理与控制,在保证语音质量的前提下,实现一对一、一对多、多对一、多对多的语音通信需求,并进行实时通信状态监控与用户管理.通过对通信终端软硬件的设计,实现将采集的语音转化为数字信号,并在本地进行数字信号的订阅与发布,提升网络使用效率,同时保证组间通信互不干扰,并且能够将通信内容通过RSA算法进行加密传输.语音通信系统能够有效降低外界电磁环境对通信质量的干扰,满足不同的使用场景和应用需求.     

Group processes in solving two problems: face-to-face and computer-mediated communication

In this study, an experiment on communication and problem solving in face-to-face communication and computermediated communication was conducted. The latter was performed in two variants; subjects writing under their own name or subjects writing anonymously. The problems were a Social Dilemma problem and a Criminal Puzzle problem. The theoretical starting point was if, and how, the communication form influences social relations, communication equality and communication processes. A qualitative analysis showed that different problems were related to different patterns of the variables studied. The computer-mediated communication solving the Criminal Puzzle problem induced relatively greater idea generation that was not responded to, while the face-toface communication was associated with relatively more answers. In the Social Dilemma, feedback was relatively more common in face-to-face communication than in computermediated communication. To 'give information about the game' was relatively more common in the anonymous computer-mediated communication than face-to-face situation, indicating that computer-mediated communication is associated with speaker generation of information, but less with responses to the interlocutor. There were no outcome differences or communication equality effects related to communication condition. These results point to the importance of the task related activities in the discussions rather than the importance of medium.     

论消防无线通信在灾害事故中的应用

无线通信技术在消防领域的应用极大地调高了我国消防部队的消防力量。文章首先介绍了短波通信、微波通信、卫星通信和移动数据通信四种常见的无线通信技术,根据统计技术的优点和劣势,提出动中卫星通信系统和无线同频同波网两种无线消防通信技术在灾害事故中应用。     

面向商品电子交易的一种安全通信平台

针对分布式网络环境中商品电子交易的安全通信问题,提出了一种面向商品电子交易的安全通信软件的框架结构。讨论了该框架中通信服务器的结构模型、工作机制,以及用户进程与交易引擎之间安全通信通道的构建方法。采用TCP/IP通信技术、Kerberos鉴别技术和IDEA数据加密技术,基于UNIX平台并结合UNIX进程间通信机制,解决了商品电子化交易中存在的通信实时性问题和安全性问题。表明设计实现的安全通信平台满足商品电子化交易的需要。