EDMI系统拟实制造软件的研究开发

该文在对ＥＤＭＩ系统ＶＭ问题研究的基础上,提出了以高级语言ＣＶＩ为外壳,以作者开发的优化及无缝连接模块为纽带,将动画仿真软件ＳＩＭＡＮ／ＣＩＮＥＭＡ、ＣＡＤ软件ＰＲＯＴＥＬ和作者开发的ＳＭＴ动画仿真模块集成于一体,构成了ＥＤＭＩ系统数据驱动式的ＶＭ软件,目前已基本完成。     

微行星齿轮减速器的计算机辅助建模和仿真的研究

ＭＥＭＳ是当今世界日益兴盛的高技术领域,而微减速器是ＭＥＭＳ中一个重要的组成部分,本文深入研究了微行星齿轮减速器的计算机辅助设计ＣＡＤ及运动学仿真问题,在ＡｕｔｏＣＡＤ和３ＤＳ基础上进行二次开发,综合了ＡｕｔｏＣＡＤ建模精确性和３ＤＳ动画仿真的优点,实现了单个齿轮的设计,图形绘制,实体建模,整个轮系的装配及驱动和仿真。     

针对产品的CAD／CAM一体化技术

本文系统地介绍了一种基于ＣＡＤ工作站，利用Ｉ－ＤＥＡＳ软件实现的针对壳体类零件的ＣＡＤ／ＣＡＭ一体化技术。论述了利用ＰＥＡＲＬ数据库实现的从ＣＡＤ模型到ＣＡＰＰ之间信息的传输，分析了在ＣＡＤ与ＣＡＭ集成中创成式ＣＡＰＰ所起的关键作用，并介绍了利用ＧＮＣ图形辅助数控软件对加工过程的仿真以及机床文件的准备，最后系统能生成正确的数控指令。系统初步实现了ＣＡＤ／ＣＡＭ一体化。     

以三维建模引擎为核心的新型建筑CAD系统研究

为了开发建筑设计全过程集成ＣＡＤ系统,提出了一种以三维建模引擎为核心的新建筑ＣＡＤ系统３ＤＭＥＣＡＤ （３Ｄ Ｍｏｄｅｌｉｎｇ Ｅｎｇｉｎｅ Ｂａｓｅｄ Ａｒｃｈｉｔｅｃｔｒｕａｌ ＣＡＤ Ｓｙｓｔｅｍ）。该系统的三维建模引擎是以基于特征的ＣＳＧ与Ｂ－ｒｅｐ混合模型为基础,作为系统的公用数据模块,实现向计算分析、仿真演示、设计成果提交等外部子系统模块的数据转化,同时利用特征识别技术实现各 同步更新     

上海大众汽车覆盖件模具CAD／CAE／CAM系统

ＣＡＤ／ＣＡＥ／ＣＡＭ技术在现代汽车模具设计和制造中具有重要作用，本文立足于上海大众汽车有限公司对车身覆盖件模具ＣＡＤ／ＣＡＥ／ＣＡＭ系统的需求，论述了上海大众汽车覆盖件模具ＣＡＤ／ＣＡＥ／ＣＡＭ系统的软硬件平和系统的结构体系，本文介绍的ＣＡＤ／ＣＡＥ／ＣＡＭ系统已在上海大众的覆盖件模具设计制造和冲压工艺规划中的开始应用，并取得若干成果。     

一个面向CAD／CAM的演绎数据库管理系统

演绎数据库管理系统ＤＥＤＢＭＳ是工程数据库管理系统ＥＤＢＭＳ／２中的一个子系统。本文着重介绍其产生式语言用户界面、工作流程及功能特点。ＤＥＤＢＭＳ系统的开发，使ＥＤＢＭＳ／２不仅具有工程数据据管理功能，而且具有数据演绎和知识处理能力，从而成为ＣＡＤ／ＣＡＭ系统集成化和智能化的有力支撑工具。     

艾克斯特发布XTEDS2000

２０００年３月２８日,北京艾克斯特工业自动化技术有限公司与电气工业协会在清华学研楼举行电气设备制造业信息化一体化解决方案的研讨会,会上,艾克斯特公司发布了其新近开发的专业电气设计和仿真软件包ＸＴＥＤＳ２０００,ＸＴＥＤＳ２０００出色的功能得到参会者的一致好评,会场反应十分热烈,研讨会取得了圆满成功。 艾克斯特公司是专业从事ＣＡＤ／ＣＡＭ／ＣＡＰＰ／ＰＤＭ／ＥＲＰ系统的软件开发、技术服务和系统集成的中外合资高新技术企业。该公司积极参与了国家“８６３ ＣＩＭＳ”工程及国家重点建设工程,为多家ＣＩＭＳ示…     

虚拟MODEM系统

本介绍了在远程通信中使用ＭＯＤＥＭ的优越性,详细介绍了保安报警网络系统开发的虚拟ＭＯＤＥＭ系统：以８０９８单片机为核心,可以完全取代ＭＯＤＥＭ而自动拔号呼叫用户,将有关命令沿市话网传递给用户,又可接收用户传来的信息,能自动识别用户应答和用户自动报警。     

提供无线通信业务的DECTlink和CDMAlink

提供无线通信业务的ＤＥＣＴｌｉｎｋ和ＣＤＭＡｌｉｎｋ在９５’日内瓦电信博展会上，酉门于公共通信网络部推出了两种新的无线通信系统：ＤＥＣＴｌｉｎｋＴ和ＣＤＭ－ｌｉｎｋ。作为将无线终端与电信网络互联的系统，它们形成多链路产品家族的一部分。ＤＥＣＴｌｉｎｋ...     

单片机与MODEM接口的设计与实现

利用单片机与ＭＯＤＥＭ接口,通过公用电话网可以实现单片机系统的远程通讯。设计了单片机与ＭＯＤＥＭ接口的硬件与软件,通过公用电话网,做了远程通讯实验,结果证明本设计是可行的,可在实际系统中应用。     

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。     

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.     

某制导控制系统交班半实物试验通信软件的开发

本系统采用网络通信和串行通信结合的方法.网络通信部分利用TCP/IP协议建立网络通信功能,开发的程序系统可使导引头终端与远程数据中心、远程控制中心和远程设计中心实现数据交换.串行通信部分利用一般单片机所拥有的RS-232串行接口,使单片机可以同计算机之间进行交互通信,介绍了通过利用微软的ActiveX控件MSComm,在VC 环境下编程的方法.实践证明,该方法简单可靠,可移植性强,可以应用于工业中需要网络通信和串行通信的领域.     

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。     

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.     

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。     

基于北斗卫星的航天器监控系统数据通信技术

传统的通信技术在航天器监控系统上通信信号接收清晰率差,监控系统数据通信效率低,针对上述问题,基于北斗卫星研究了一种新的航天器监控系统数据通信技术,通过数据参数收集、数据指令查找、数据通信收集实现航天器监控系统通信数据收集,采取基于信息语言表述方式,进行航天器运行时间实时数据传输控制,利用矢量计算和精度分析确定航天器监控系统通信数据。对比实验结果表明,基于北斗卫星的航天器监控系统数据通信技术通信信号接收清晰率高,监控系统数据通信效率好。     

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.     

现代通信新技术

本文从卫星通信、移动通信、计算机数据通信、光缆通信、个人通信五个方面,论述了现代通信中的新技术及其发展特点。