Stationary state

Japanese: 定常状態 - ていじょうじょうたい(英語表記)stationary state
Stationary state
In dynamic phenomena such as fluid flow, heat conduction, and electric current, when the quantities that determine their state do not change over time, that state is called a steady state. A term opposed to a transient state. In quantum mechanics, it refers to a state in which the energy of a system is constant. Steady states correspond to the energy levels of atoms, molecules, atomic nuclei, etc. In electrical circuits, it refers to the time when an input signal is applied and sufficient time has passed for the transient response to disappear.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
流体の流れ,熱の伝導,電流などの動的な現象で,それらの状態を決定する諸量が時間的に不変なとき,その状態を定常状態という。過渡状態に対する用語。量子力学では,系のエネルギーが一定の状態をいう。原子,分子,原子核などエネルギー準位には定常状態が対応している。電気回路では入力信号が加えられて過渡応答が消えるほど十分に時間が経過したときのことをいう。

出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報

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