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为解决嵌入式PLC和手持编程器的通信问题,分析了嵌入式PLC和手持编程器的通信工作过程,提出了采用LPC2478以及其自带的CAN控制器进行通信节点硬件设计.针对系统通信特点,设计了CAN扩展协议,并重点介绍了CAN扩展协议的格式含义及采用uC/OS-Ⅱ实时操作系统和CAN扩展协议进行系统软件应用程序的设计及编写方法.通过实验结果表明,该设计可以实现手持编程器和嵌入式PLC远程下载、读取、监控等通信功能. 相似文献
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随着轨道交通综合监控技术的发展,各级监控中心之间数据传输规模不断扩大,现有的通信协议已经成为其性能瓶颈。为了解决这个问题,本文提出了一种MODBUS协议扩展方案,在标准MODBUS协议框架下,扩展应答帧长,定义变化数据基本单元并加入变化传输机制。通过实施本方案,通信应用的网络消耗与CPU负载降低了2个数量级,而可靠性和实时性基本不受影响。 相似文献
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全自主足球机器人通信子系统的设计与实现 总被引:4,自引:0,他引:4
全自主足球机器人系统涉及到在未知的动态环境中多机器人的协同工作,如何实现各足球机器人之间的高效实时通信是一个关键的问题。通信需要解决对话管理、对话协议和通信平台三个问题。其中,对话管理为机器人之间的信息交换提供各种连接方式;对话协议是机器人之间对协作信息内容和格式的约定;通信平台则是实现信息交互的物理硬件。该文采用基于CSMA/CA的无线局域网,建立了全自主足球机器人通信子系统的通信平台;建立了基于C/S模式的对话管理;并为多机器人系统的协作问题求解提出了一套可行的对话协议。实验证明该设计可行。 相似文献
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本文分析了传统SYSLOG协议在安全传输上存在的不足,基于BEEP协议(块扩展协议),将SYSLOG应用作为BEEP的配置文件引入其通信框架之上,利用BEEPCore的通信规程和安全配置协商机制实现了对SYSLOG安全传输的增强。 相似文献
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This article describes the rationale for the multiphase creative problem solving process, and reports the findings from an empirical investigation conducted to facilitate the problem solving of managers. The ideational skills of the managers were assessed before and after training in a complete process of creative problem solving, along with their ideational attitudes, creative problem solving style (i.e., generator, conceptualizer, optimizer, or implementor), and evaluative skill (i.e., ability to recognize original ideas). The most important findings indicated that the training had a significant impact on the evaluative accuracy of the managers. They were significantly more accurate in their judgments about original ideas after training, both in their identification of original ideas and their recognition of unoriginal ideas. After training, the managers also gave more solutions and more original solutions to problems. Finally, several variables (e.g., the “preference for active divergence” attitude, and the conceptualizer process style) seemed to moderate the impact of training. Training was therefore effective, with specific effects that can be predicted from pre-training individual differences in attitudes and process style. 相似文献
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为提高高等院校的管理水平和决策水平,充分利用校园网资 源,开发了高等院校行政财政分析与决策系统。解决了诸如数据的动态查询、自动生成报表 、网络环境下数据共享等技术问题,具有网上数据共享、图形界面友好和安全的保密措施等 特点。 相似文献
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为发现我国国家标准与国外发达国家标准法规的差距,从根本上提高我国国家标准的总体质量,提升我国产品的质量安全水平,以关键指标(因子)为核心,研究国内外标准法规比对的工作流程,利用面向对象的方法设计,实现了国内外标准法规比对分析系统。该系统适用于所有产品国内外标准法规的比对工作。 相似文献
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Harshavardhana P. Jonckheere E. Silverman L. 《Automatic Control, IEEE Transactions on》1984,29(8):744-746
A new method of stochastic model reduction has recently been introduced by Desai et al. [1], [2]. The stability of the reduced order model has not previously, been considered. In this paper, we show that the stability of the reduced order model follows directly from the results of Pernebo and Silverman [3]. It is also shown that the reduced order model is minimal, in the controllability/observability sense. The relevance of this notion of minimality to stochastic minimality is made clear. 相似文献
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