V2EX transition function

Transition Function

释义 Definition

transition function转移函数 / 状态转移函数。指在数学、计算机科学与概率模型中,用来描述“系统如何从一个状态变到下一个状态”的函数;在一些模型里它也可具体表示为给定输入/动作时的下一状态,或转移到各个下一状态的概率分布。(在不同领域中可能有确定性与随机性两种常见用法。)

例句 Examples

The transition function takes the current state and gives the next state.
转移函数接收当前状态并给出下一个状态。

In a Markov decision process, the transition function defines the probability of moving to each next state given a state and an action.
在马尔可夫决策过程(MDP)中,转移函数定义了:在给定某个状态和某个动作时,转移到各个下一状态的概率。

发音 Pronunciation (IPA)

/trnzn fkn/

词源 Etymology

transition 来自拉丁语 *trans-*(“越过、穿过”)+ ire(“走”),引申为“转变、过渡”;function 源自拉丁语 functio,本义与“执行、作用”相关,后来在数学中固定为“函数”。合起来 transiton function 就是“描述(状态)如何过渡的函数”。

相关词 Related Words

文学/经典作品中的用例 Literary Works

  • Introduction to Automata Theory, Languages, and Computation(Hopcroft, Motwani & Ullman)在有限自动机/形式语言部分讨论“状态转移函数(transition function)”的定义与性质。
  • Reinforcement Learning: An Introduction(Sutton & Barto)在MDP框架下使用“transition function”描述环境动力学与状态转移概率。
  • Markov Chains(J. R. Norris)在马尔可夫链相关表述中涉及从当前状态到下一状态的转移机制(常与转移概率/转移结构一起出现)。
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