measurability是什麼意思,measurability的意思翻譯、用法、同義詞、例句
常用詞典
n. 可測量性
例句
Admittedly, the measurability isn't perfect.
需要承認的是,這種可衡量性并不完美。
Look for measurability in the products you buy.
在您購買的産品中尋找可測性。
The measurability of effects on reducing the frequency noise was indicated.
指出了低頻降噪效果的可測性。
This measurability applies, quite intentionally, to all of these achievements.
這種可衡量性意圖適用所有這些成就。
The measurability of effects on reducing the low-frequency noise was indicated.
指出了低頻降噪效果的可測性。
網絡擴展資料
“Measurability”(可測性)是一個數學術語,主要出現在測度論和概率論中,用于描述集合或函數是否滿足特定條件,使其能夠被賦予“測度”(一種廣義的體積或概率概念)。以下是詳細解釋:
1. 基本定義
- 數學背景:可測性與“測度”密切相關。測度是對集合大小的抽象度量(如長度、面積、概率等)。例如,在實數軸上,區間長度是測度;在概率中,事件發生的可能性也是一種測度。
- 核心意義:一個集合或函數如果滿足特定條件(如屬于某個σ-代數),則被稱為“可測的”。隻有可測的集合/函數才能被賦予測度,進而進行積分、概率計算等操作。
2. 可測集合與σ-代數
- σ-代數:一個集合族,滿足對可數并、補集運算封閉。例如,Borel σ-代數由實數軸上的開集生成。
- 可測集合:若集合屬于某個σ-代數,則它是可測的。例如,區間 ([a, b]) 在Borel σ-代數下可測,但某些複雜集合可能不可測。
3. 可測函數
- 定義:函數 (f: X to Y) 是可測的,如果對Y中每個可測集合的原像(preimage)在X中也是可測的。
- 應用:在積分理論中,勒貝格積分要求函數可測,才能定義積分值。例如,Dirichlet函數(有理數指示函數)在勒貝格積分下可測且積分為0,但黎曼積分不可積。
4. 概率論中的可測性
- 隨機變量:本質是可測函數。若隨機變量 (X: Omega to mathbb{R}) 可測,則事件如 ({X leq c}) 可賦予概率(即屬于σ-代數)。
- 重要性:可測性保證了期望、方差等概率操作的定義有效性。
5. 實際應用領域
- 物理學:可測性用于定義能量、熵等物理量的測度。
- 經濟學:在風險模型中,可測函數描述不确定的經濟變量。
- 機器學習:概率模型依賴可測性來定義概率分布和損失函數。
可測性是一個基礎但關鍵的概念,它确保數學對象(集合、函數)能夠被合理“測量”,從而支持積分、概率、優化等理論的構建。如果涉及具體數學問題,可進一步讨論σ-代數構造或可測函數的性質。
網絡擴展資料二
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. (員工績效的可度量性對于任何組織的成功至關重要。)
- The success of a marketing campaign is dependent on the measurability of its outcomes. (市場營銷活動的成功取決于其結果的可度量性。)
- The measurability of the company's financial performance is key to attracting investors. (公司財務績效的可度量性對于吸引投資者至關重要。)
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
别人正在浏覽的英文單詞...
【别人正在浏覽】