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Functional analogs (or functional analogues) are entities (models, representations or compounds) that can be replaced, to fulfill the same function. When the entities in question are formally represented by black boxes, the concept of ''analog'' is related to "same behaviour": they take the same output sequence when submitted to the same input sequence. == Systems engineering== Analogical models are used in a method of representing a ‘target system’ by another, more understandable or analysable system. Two systems have analog functions (see illustration) if the black box representation of both can be the same. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「functional analog」の詳細全文を読む スポンサード リンク
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