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This paper discusses a new algebraic model of electrical networks by which a deeper understanding is achieved of the interrelation existing between a system of independent cut sets and the corresponding system of independent “contours”, in the sense of orthogonal network theory (1).The new model allows, by a redefinition of f-cut sets, to give an interpretation in terms of linear graph theory to the inverse connection matrix A.sb, i.e. to the transformation matrix between voltages in the orthogonal and the primitive reference frames, for a general choice of independent contours.Furthermore, a directly algebraic derivation of the voltage transformation is presented, recalling the properties of dual vector spaces and without invoking the principle of invariance of the instantaneous power. 相似文献
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Although industrial and consumer videodisc technology has been available since 1978, information providers are now just beginning to explore the possibilities of using videodisc and optical disk technology as publishing media. Firms involved in the design, development, and delivery of information products and services are looking at these technologies as new business opportunities and distribution channels. The areas in which information providers are using videodisc and optical disk technology are covered briefly. 相似文献
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