“time constant”的概念、定义、翻译、参考文献-科学参考

单词	time constant
释义	time constant [`tīm ´kän·stǝnt] ^PHYSICS 1. The time required for a physical quantity to rise from zero to 1-1/e (that is, 63.2%) of its final steady value when it varies with time t as 1 - e^-kt. 2. The time required for a physical quantity to fall to 1/e (that is, 36.8%) of its initial value when it varies with time t as e^-kt. 3. Generally, the time required for an instrument to indicate a given percentage of the final reading resulting from an input signal. Also known as lag coefficient.
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