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Level of measurement. Level of measurement or scale of measure is a classification that describes the nature of information within the values assigned to variables. [1] Psychologist Stanley Smith Stevens developed the best-known classification with four levels, or scales, of measurement: nominal, ordinal, interval, and ratio.
Three-phase transformer with four-wire output for 208Y/120 volt service: one wire for neutral, others for A, B and C phases. Three-phase electric power (abbreviated 3ϕ [1]) is a common type of alternating current (AC) used in electricity generation, transmission, and distribution. [2] It is a type of polyphase system employing three wires (or ...
31 de dic. de 2022 · 类型的相等理论的差异相当巨大，两个极端的例子是结构类型系统（Structural type system），任两个以相同结构所描述的值的类型都是等价的，且在标明类型系统（Nominative type system）上，没有两个独特的语法构成的类型表达式表示同一类型，（即类型若要相等，就必须具有相同的“名字”）。
nominative type system (plural nominative type systems) ( programming) A major type system where compatibility and equivalence of data types are determined by explicit declarations or the names of the types.
A type species is the nominal species that is the name-bearing type of a nominal genus or subgenus. A type genus is the nominal genus that is the name-bearing type of a nominal family-group taxon. The type series are all those specimens included by the author in a taxon's formal description, unless the author explicitly or implicitly excludes them as part of the series.
名义子类型 （ 英语 ： nominal type system ） ，在其中只有类型声明的名字相同才算是相同类型，子类型关系必须被显式声明。 C , C++ , C# , Java , Objective-C 等语言均属于这类。
Unique. See also. Strong and weak typing. In programming languages, a type system is a set of rules that assigns a property called type to the various constructs of a computer program, such as variables, expressions, functions or modules. [1]
