V2EX  ›  英汉词典

Nonpositive

定义 Definition

nonpositive(形容词):非正的;指小于或等于零(≤ 0)的数或量。常用于数学、统计学、优化等语境。(在少数语境中也可泛指“并不积极的/不正面的”,但最常见用法是数学意义。)

发音 Pronunciation

/ˌnɑːnˈpɑːzətɪv/

例句 Examples

The temperature stayed nonpositive all night.
气温整晚都保持在非正值(≤0)。

Assume the error term is nonpositive for every observation, which implies the model consistently overestimates the true value.
假设对每个观测值误差项都为非正,这意味着模型一直在高估真实值。

词源 Etymology

由前缀 **non-**(“不、非”)+ positive(“正的/正数的”)构成,字面意思是“非正的”。在数学中,“positive”通常指 > 0,因此“nonpositive”标准地表示 ≤ 0

相关词 Related Words

文学与经典作品 Literary Works

  • Convex Optimization(Stephen Boyd & Lieven Vandenberghe)
  • Linear Algebra and Its Applications(David C. Lay)
  • Introduction to Probability(Dimitri P. Bertsekas & John N. Tsitsiklis)
  • Real and Complex Analysis(Walter Rudin)
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