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#REDIRECT [[Analogical models]]
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{{Article for deletion/dated|page=Structural analog (electronic)|timestamp=20230618061125|year=2023|month=June|day=18|substed=yes}}
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[[File:Mobility analogy resonator vertical.svg|thumb|A [[mechanical network]] diagram of a simple [[RLC circuit#Parallel RLC circuit|resonator]] (top) and one [[electrical network]] with an equivalent structure and behaviour (bottom), then, an ''analog'' for it.]]
Despite the field diversity, all ''structural analog'' analysis use some level of abstraction to transform [[Conceptual model|models]] in [[Graph (discrete mathematics)|mathematical graphs]], and detected structural analogies by [[algorithms]]. Example: for molecular structure comparison and classification operations, the compared compounds are modeled as a [[Graph (discrete mathematics)|mathematical graph]].<ref>C Ashby et al. (2013), "New enumeration algorithm for protein structure comparison and classification", BMC Genomics [https://dx.doi.org/10.1186/1471-2164-14-S2-S1 DOI:10.1186/1471-2164-14-S2-S1]</ref>
[[Analogical models]] are used in a method of representing a ‘[[Open system (systems theory)|target system]]’ by another, more understandable or analysable system.
Two systems have analog structures (see illustration) if they are [[graph isomorphism|isomorphic graphs]] and have equivalent (mapped) [[Lumped element model|lumped elements]]. In [[electronics]], methods based on fault models of structural analogs gain some acceptance in industry.<ref>"[http://uran.donetsk.ua/~masters/2010/fknt/masyakin/library/article3_or.htm Analog Automatic Test-Pattern Generation]", M. L. Bushnell, V. D. Agraval</ref>
