measurability是什么意思,measurability的意思翻译、用法、同义词、例句
常用词典
n. 可测量性
例句
Admittedly, the measurability isn't perfect.
需要承认的是,这种可衡量性并不完美。
Look for measurability in the products you buy.
在您购买的产品中寻找可测性。
The measurability of effects on reducing the frequency noise was indicated.
指出了低频降噪效果的可测性。
This measurability applies, quite intentionally, to all of these achievements.
这种可衡量性意图适用所有这些成就。
The measurability of effects on reducing the low-frequency noise was indicated.
指出了低频降噪效果的可测性。
网络扩展资料
“Measurability”(可测性)是一个数学术语,主要出现在测度论和概率论中,用于描述集合或函数是否满足特定条件,使其能够被赋予“测度”(一种广义的体积或概率概念)。以下是详细解释:
1. 基本定义
- 数学背景:可测性与“测度”密切相关。测度是对集合大小的抽象度量(如长度、面积、概率等)。例如,在实数轴上,区间长度是测度;在概率中,事件发生的可能性也是一种测度。
- 核心意义:一个集合或函数如果满足特定条件(如属于某个σ-代数),则被称为“可测的”。只有可测的集合/函数才能被赋予测度,进而进行积分、概率计算等操作。
2. 可测集合与σ-代数
- σ-代数:一个集合族,满足对可数并、补集运算封闭。例如,Borel σ-代数由实数轴上的开集生成。
- 可测集合:若集合属于某个σ-代数,则它是可测的。例如,区间 ([a, b]) 在Borel σ-代数下可测,但某些复杂集合可能不可测。
3. 可测函数
- 定义:函数 (f: X to Y) 是可测的,如果对Y中每个可测集合的原像(preimage)在X中也是可测的。
- 应用:在积分理论中,勒贝格积分要求函数可测,才能定义积分值。例如,Dirichlet函数(有理数指示函数)在勒贝格积分下可测且积分为0,但黎曼积分不可积。
4. 概率论中的可测性
- 随机变量:本质是可测函数。若随机变量 (X: Omega to mathbb{R}) 可测,则事件如 ({X leq c}) 可赋予概率(即属于σ-代数)。
- 重要性:可测性保证了期望、方差等概率操作的定义有效性。
5. 实际应用领域
- 物理学:可测性用于定义能量、熵等物理量的测度。
- 经济学:在风险模型中,可测函数描述不确定的经济变量。
- 机器学习:概率模型依赖可测性来定义概率分布和损失函数。
可测性是一个基础但关键的概念,它确保数学对象(集合、函数)能够被合理“测量”,从而支持积分、概率、优化等理论的构建。如果涉及具体数学问题,可进一步讨论σ-代数构造或可测函数的性质。
网络扩展资料二
Measurability (可度量性) is a noun that refers to the quality or state of being measurable or capable of being measured.
Pronunciation
Measurability is pronounced as /ˌmeʒərəˈbɪləti/ in English.
Parts of Speech
Measurability is a noun.
Definition
Measurability refers to the capability of being measured. It is the quality or state of being measurable, quantifiable, or observable.
Example Sentences
- The measurability of employee performance is essential for the success of any organization. (员工绩效的可度量性对于任何组织的成功至关重要。)
- The success of a marketing campaign is dependent on the measurability of its outcomes. (市场营销活动的成功取决于其结果的可度量性。)
- The measurability of the company's financial performance is key to attracting investors. (公司财务绩效的可度量性对于吸引投资者至关重要。)
Usage
Measurability is a term that is often used in business, marketing, and scientific contexts to describe the ability to measure or quantify something. It is commonly used in discussions related to the evaluation of performance, outcomes, and results.
Synonyms
- Quantifiability
- Observability
- Calibratability
- Testability
Antonyms
- Immeasurability
- Unquantifiability
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