单词盒子

frequency

F 开头单词

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.频繁；频率

词源解说

  • 直接源自拉丁语的frequentia，意为频率，周率。

词根记忆

  • 来自frequent(a.频繁的)

同根派生

  • adj性质的同根词
    frequent：频繁的；时常发生的；惯常的。
  • adv性质的同根词
    frequently：频繁地，经常地；时常，屡次。
  • vt性质的同根词
    frequent：常到，常去；时常出入于。

英汉例句

    用作名词 (n.)

  • Traffic accidents have decreased in frequency over recent years.
    近年来交通事故发生的频率已经下降。

词组短语

    用作名词 (n.)

    形容词+～

  • alarming frequency 惊人的频率
  • high 〔low〕 frequency 高〔低〕频
  • increasing frequency 越来越频繁

    • 名词+～

  • radio frequency 无线电频率
  • word frequency 词的出现频率

    • 介词+～

  • at 〔with〕 frequency 以…的频率
  • be on the frequency for a channel 正接收某频道

    • 短语

  • frequency modulation 调频

英英字典

    剑桥英英字典

  • (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

    电子、通信与自动控制技术

  • 频率

    The frequency calculation is the core of the device.
    其中,频率计算是本装置的核心部分。

    计算机科学技术

  • 频率

    Wavelet analysis is the widely used time-frequency tool.
    小波分析是目前国际上最新的也是应用最广泛的时间-频率分析工具。

  • 频谱分析

    Through vibration frequency spectrum analysis of no-tillage seeder in field, its vibration characteristics were obtained.
    通过对播种机的田间振动频谱分析，得到了它的的振动特征。

  • 频度

    As the frequency and the semantic feature of the words are combined, the quality of clustering is improved.
    词的频度和语义特征相结合后,提高了文本聚类的性能。

    医药科学

  • 频数

    Methods: A hospital-based frequency matched case-control study was conducted.
    方法:采用以医院为基础的频数匹配病例对照研究方法。

  • 发生率

    The frequency of symptom and sign in lower limb DVT was 27.5%.3.
    下肢DVT症状和体征发生率为27.5%。

  • （脉搏的）每分钟搏动次数

    • 农业科学

  • 频次

    In addition, the figures of locust plague frequency of the three subspecies of migratory locusts were drawn on 100-year scale.
    此外,还绘制了历代三大飞蝗灾害发生的百年频次图。

    交通运输工程

  • 频域

    Study on the detection of the frequency-shift in both the time domain and the frequency domain is provided in this paper.
    本文从时域和频域两个方面对移频信号的检测进行研究。

    航空、航天科学技术

  • 频域

    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.
    经典频域设计理论能够解决系统的鲁棒性问题,却不能很好的应用于多输入多输出系统,因此,本文选用了H_∞回路成形法来设计控制器。

    法学

  • 效率

    • 体育

  • 步频

    The step frequency of hurdle race athletes is faster than that of sprint and long jump athletes and there are very significant difference(P
    步频上,跨栏运动员快于短跑和跳远运动员,存在非常显著差异(P

    心理学

  • 词频

    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.
    实验一(A)在消极启动情况下对词频与偏好效应的关系进行了测量，实验结果发现，汉语识别中存在偏好效应，被试倾向于选择先前学习过的项目；偏好效应受词频变化的影响，在高频词时有更大的偏好效应。

    生物学

  • 频率
  • 频数
  • 频度
  • 周率

    • 机械工程

  • 频率
  • 频
  • 周率

    • 测绘科学技术

  • 频率

    • 地球科学

  • 频率

    • 能源科学技术

  • 频率

    • 水利工程

  • 频率