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单词 constant
释义
constant
Physics

  • 1. A component of a relationship between variables that does not change its value, e.g. in y=ax+b, b is a constant.

    2. A fixed value that has to be added to an indefinite integral. Known as the constant of integration, it depends on the limits between which the integration has been performed.

    3. See fundamental constants.

Chemical Engineering

  • 1. A quantity that does not vary such as temperature, pressure, or level in a process.

    2. A number used in a mathematical relationship that is multiplied by a variable such as y = ax where a is a constant.

    3. A fundamental constant used in formulae or calculations such as π or g.

    4. A fixed value, c, that is added to an indefinite integral such as:

    ∫xdx=x22+c

Computer

  • 1. A quantity or data item whose value does not change.

    2. A value that is determined by its denotation, i.e. a literal.

Philosophy

  • A term in a logical calculus to which any interpretation assigns a fixed meaning, unlike a variable or schematic letter.
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