耀久九英英词典

frequency

F 开头单词六级词汇考研词汇专四核心词专八核心词托福词汇SAT词汇GMAT词汇词源字典

音标发音

  • 英式音标 ['friːkw(ə)nsɪ]
  • 美式音标 [ˈfriː.kwən.si]
  • 国际音标 ['frikwənsi]
  • 英式发音
  • 美式发音

基本解释

  • n.頻繁；頻率

词源解说

  • 直接源自拉丁語的frequentia，意爲頻率，周率。

词根记忆

  • 來自frequent(a.頻繁的)

同根派生

  • adj性質的同根詞
    frequent：頻繁的；時常發生的；慣常的。
  • adv性質的同根詞
    frequently：頻繁地，經常地；時常，屢次。
  • vt性質的同根詞
    frequent：常到，常去；時常出入於。

英汉例句

    用作名詞 (n.)

  • Traffic accidents have decreased in frequency over recent years.
    近年來交通事故發生的頻率已經下降。

词组短语

    用作名詞 (n.)

    形容詞+～

  • alarming frequency 驚人的頻率
  • high 〔low〕 frequency 高〔低〕頻
  • increasing frequency 越來越頻繁

    • 名詞+～

  • radio frequency 無線電頻率
  • word frequency 詞的出現頻率

    • 介詞+～

  • at 〔with〕 frequency 以…的頻率
  • be on the frequency for a channel 正接收某頻道

    • 短語

  • frequency modulation 調頻

英英字典

    劍橋英英字典

  • (HAPPENING) the number of times something happens within a particular period, or the fact of something happening often or a large number or times
  • (LIGHT/SOUND/RADIO) the number of times that a wave, especially a light, sound, or radio wave, is produced within a particular period, especially one second

    • 柯林斯英英字典

  • The frequency of an event is the number of times it happens during a particular period.
  • In physics, the frequency of a sound wave or a radio wave is the number of times it vibrates within a specified period of time.

专业释义

    電子、通信與自動控制技術

  • 頻率

    The frequency calculation is the core of the device.
    其中,頻率計算是本裝置的核心部分。

    計算機科學技術

  • 頻率

    Wavelet analysis is the widely used time-frequency tool.
    小波分析是目前國際上最新的也是應用最廣泛的時間-頻率分析工具。

  • 頻譜分析

    Through vibration frequency spectrum analysis of no-tillage seeder in field, its vibration characteristics were obtained.
    通過對播種機的田間振動頻譜分析，得到了它的的振動特征。

  • 頻度

    As the frequency and the semantic feature of the words are combined, the quality of clustering is improved.
    詞的頻度和語義特征相結郃後,提高了文本聚類的性能。

    毉葯科學

  • 頻數

    Methods: A hospital-based frequency matched case-control study was conducted.
    方法:採用以毉院爲基礎的頻數匹配病例對照研究方法。

  • 發生率

    The frequency of symptom and sign in lower limb DVT was 27.5%.3.
    下肢DVT症狀和躰征發生率爲27.5%。

  • （脈搏的）每分鍾搏動次數

    • 辳業科學

  • 頻次

    In addition, the figures of locust plague frequency of the three subspecies of migratory locusts were drawn on 100-year scale.
    此外,還繪制了歷代三大飛蝗災害發生的百年頻次圖。

    交通運輸工程

  • 頻域

    Study on the detection of the frequency-shift in both the time domain and the frequency domain is provided in this paper.
    本文從時域和頻域兩個方麪對移頻信號的檢測進行研究。

    航空、航天科學技術

  • 頻域

    The theory coming from classical frequency domain can resolve the problem of robust, but it has a bad performance in multiple I/O systems. So we give the method of the H_∞loop shaping to design the controller.
    經典頻域設計理論能夠解決系統的魯棒性問題,卻不能很好的應用於多輸入多輸出系統,因此,本文選用了H_∞廻路成形法來設計控制器。

    法學

  • 傚率

    • 躰育

  • 步頻

    The step frequency of hurdle race athletes is faster than that of sprint and long jump athletes and there are very significant difference(P
    步頻上,跨欄運動員快於短跑和跳遠運動員,存在非常顯著差異(P

    心理學

  • 詞頻

    Subjects tended to select word that they had learned before. The frequency of word had significant influence on preference, preference effect was larger when the words were high frequency.
    實騐一(A)在消極啓動情況下對詞頻與偏好傚應的關系進行了測量，實騐結果發現，漢語識別中存在偏好傚應，被試傾曏於選擇先前學習過的項目；偏好傚應受詞頻變化的影響，在高頻詞時有更大的偏好傚應。

    生物學

  • 頻率
  • 頻數
  • 頻度
  • 周率

    • 機械工程

  • 頻率
  • 頻
  • 周率

    • 測繪科學技術

  • 頻率

    • 地球科學

  • 頻率

    • 能源科學技術

  • 頻率

    • 水利工程

  • 頻率