摘要:

The term ‘local network’ first began to appear in print as long as ten years ago. In the second half of the 1970s there was a great deal of interest in techniques for implementing this type of network, namely to link together computers over a restricted area at low cost and at high data rates. It is now becoming apparent that two local network architectures in particular will become internationally the most prominent: these are the Ethernet and the token ring, both backed by US and European standards bodies and by competing and large industrial interests. A token bus is also being adopted for standardisation but seems likely to be in a somewhat secondary role. In the UK the Cambridge Ring, a slotted ring architecture, has made its own impact, but its future appears limited in a wider context. Nevertheless a large research and development effort is associated with the Cambridge Ring and has resulted in a set of UK local networking standards. The purpose of the paper is to give an introduction to each of these local area network structures, particularly by means of their associated standards. A comprehensive list of references is provided as a basis for further reading into the subject

ISSN:1744-683X    

DOI:10.1049/sm.1983.0036

出版商:IEE    

年代:1983

数据来源: IET

摘要:

The concept of the digital differential analyser can be applied directly to programs for the Intel 2920 for the solution of differential equations. The technique is particularly useful where this solution is an analogue function which needs to be generated. One example quoted is that of sinusoidal generation. Error analysis and program correctness proofs are not considered in the paper

ISSN:1744-683X    

DOI:10.1049/sm.1983.0039

出版商:IEE    

年代:1983

数据来源: IET

摘要:

The development of a multi-microprocessor system suitable for the automatic control of a railway locomotive is described. The technique of time redundancy is used to reduce the amount of hardware to a minimum and to provide transient fault detection and error correction. The software controlling input/output is separated from the main application programs and is integral with the error checking system software. In this way, the probability of incorrect outputs is considerably reduced when working in an environment likely to cause transient faults. Finally, a duplex Cyclone arrangement is proposed to meet requirements for single-hard-fault tolerance

ISSN:1744-683X    

DOI:10.1049/sm.1983.0041

出版商:IEE    

年代:1983

数据来源: IET

ISSN:1744-683X    

DOI:10.1049/sm.1983.0042

出版商:IEE    

年代:1983

数据来源: IET

ISSN:1744-683X    

DOI:10.1049/sm.1983.0043

出版商:IEE    

年代:1983

数据来源: IET