Junction elements in network models. Classify by number of ports and examine the possible structures that result. Using only one-port elements, no more than two elements can be assembled. Combining two two-ports yields another two-port. At most two one-port elements could be connected. Thus three-port junction elements are necessary. They are also sufficientinsofar as junctions with more than three ports may be constructed from assemblages of three-ports. An assembly of two three-port elements yields a four-port element. Using two- and three-port junctions, an arbitrary number of one-port (or n-port) elements may be assembled into a system. Three-port junction elements A junction structure or junction element is treated as a system with certain special properties which are derived from energetic considerations. Mod. Sim. Dyn. Sys. page 1 Neville Hogan
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