共查询到20条相似文献,搜索用时 54 毫秒
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提出了一种针对采用的STM32控制器的基于CAN总线的分布式系统程序在线更新方案,主控节点利用TFTP协议从以太网获得更新程序,再利用CAN通过分块文件传输协议更新各个节点的程序.并简要介绍了STM32的启动流程以及程序加载的方法. 相似文献
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提供了直接面向操作者的动态数据采集分析系统的虚拟仪器硬件构成、设计与实现。虚拟仪器技术是现代计算机技术与传统仪器技术相结合的新兴的边缘科学技术 ,代表了仪器技术发展的方向 ,并越来越显示出其强大的生命力 相似文献
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《IEEE transactions on pattern analysis and machine intelligence》1983,(4):470-486
An event order based model for specifying and analyzing concurrency control algorithms for distributed database systems has been presented. An expanded notion of history that includes the database access events as well as synchronization events is used to study the correctness, degree of concurrency, and other aspects of the algorithms such as deadlocks and reliability. The algorithms are mapped into serializable classes that have been defined based on the order of synchronization events such as lock points, commit point, arrival of a transaction, etc,. 相似文献
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通过设计一种基于ARM的测试系统,对岩体力学性质测试的试验数据进行自动化的测试、采集和分析,来准确预测岩体在各种应力场作用下的变形与稳定性,进而为合理的工程设计提供岩体力学依据. 相似文献
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Increasing global competition forces manufacturers of products fi‘om all technical fields to guarantee a high product quality for a long period of time. At the same time it is necessary to minimize production costs. In order to meet all these requirements, on-line data acquisition and processing ate of increasing importance in distributed automation systems. A software bus operating on industrial Ethemet has an ability to minimize operating costs by offering easy installation, scalability, high degree of reliability and remote monitoring and control. 相似文献
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Skewed Data Partition and Alignment Techniques for Compiling Programs on Distributed Memory Multicomputers 总被引:3,自引:0,他引:3
Minimizing data communication over processors is the key to compile programs for distributed memory multicomputers. In this paper, we propose new data partition and alignment techniques for partitioning and aligning data arrays with a program in a way of minimizing communication over processors. We use skewed alignment instead of the dimension-ordered alignment techniques to align data arrays. By developing the skewed scheme, we can solve more complex programs with minimized data communication than that of the dimension-ordered scheme. Finally, we compare the proposed scheme with the dimension-ordered alignment one by experimental results. The experimental results show that our proposed scheme has more opportunities to align data arrays such that data communications over processors can be minimized. 相似文献
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介绍了分散控制系统中一种显著改善数据传输性能的组网方式。针对当前DCS应用出现的网络通信问题与不足,说明了在DCS应用中增加第三条专用网络的技术与思路,使DCS中工业以太网的功能得到更进一步的增强,从而更好地满足大中型规模的DCS工程项目的需求。 相似文献
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John D. McGregor Il-Hyung Cho Brian A. Malloy E. Lowry Curry Chanika Hobatr 《Empirical Software Engineering》1999,4(3):217-240
The Common Object Request Broker Architecture (CORBA) supports the creation of distributed systems that cross processor, language and paradigm boundaries. These systems can be large and complex entities that consume considerable resources in their creation and execution. Measurements of characteristics of software systems is an important area of study in general and of particular interest for distributed systems. In this paper, we present a specific technique for instrumenting components in a distributed system. The technique constructs a wrapper around the component being measured. The wrapper monitors interactions with the ORB (Object Request Broker) and other components. Each wrapper mimics the interface of the component that it is wrapping so that the remaining objects in the system do not need modification. Two approaches to wrapping the component are presented and contrasted. The result is an efficient and modular technique that can quickly be applied to a component. 相似文献
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