英语学习词典
  

frequencies

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frequency [ 'fri:kwənsi] n.屡次;次数;频率

frequency [ 'fri:kwənsi] n.频繁,屡次;频率

frequency ['fri:kwənsi] 频率

AF Audio Frequency 音频

AFA Audio Frequency Amplifier 音频放大器

AFC Automatic Frequency Coder 音频编码器

Automatic Frequency Control 自动频率控制

Automatic Frequency Track 自动频率跟踪

Automatic Frequency Trim 自动额率微调

Frequency Changer 变频器

FDCT Frequency Divider 分频器

Frequency-Division Multiplexing 频分复用

FN Frequency Generator 频率发生器

FOA Frequency Hopping 跳频

Hi-Fi High Frequency 高频

IOD Intermediate Frequency 中频

LRC Low Frequency 低频

LS Low Frequency Response 低频响应

LSD Low Frequency Oscillator 低频振荡器

MON Medium Frequency 中频

PL Pulse Frequency Modulation 脉冲频率调制

RF Radio Frequency 射频

UHF Ultra-High Frequency 特高频

ULF Ultra-Low Frequency 超低频

VF Video Frequency 视频

VHF Very High Frequency 甚高频

FDM Frequency Division Multiplexing 频分复用

FM Frequency Modulation 频率调制(调频)

FSK Frequency Shift Keying 移频键控(调制),频移键控(法)

Frequency Meter 冰箱温度计

频率 frequency rate

advertising frequency 广告频率

departure frequency 发车频率

service frequency 行车频率

minor repair frequency 小修频率

汽车悬挂系统固有频率与阻尼比的测定试验
measurement of natural frequency and damping raito of suspension

频率响应时间试验
frequency response test

发动机转速
engine speed (rotational frequency)

视在频率
apparent frequency

发射波频率
emitted frequency

取样频率
sampling frequencies

频率级通道
channel frequency classes

射频干扰
radio frequency interference(RFI)

射频噪声
radio frequency noise

频率响应
frequency response

频率级规格
frequency step sizes

甚高频
very high frequency (VHF)

超高频
ultra-high frequency (UHF)

中频抑制比
intermediate frequency rejection ratio

射频滤波器
radio frequency (RF)filter

频率分析仪
frequency analyzer

声频
acoustical frequency

频谱分析仪
frequency spectrum analyzer

The drop hollows the stone, not by force, but by the frequency of its fall.
滴水穿石不是由于使用强力所致,而是由于滴水频繁所成。

Echo frequency 回波频率

Frequency constant 频率常数

Fundamental frequency 基频

Inspection frequency/ test frequency 检测频率

Nominal frequency 标称频率

Pulse repetition frequency 脉冲重复频率

Radio frequency (r- f) display 射频显示

Radio- frequency mass spectrometer 射频质谱仪

Radio frequency(r-f) display 射频显示

Spacial frequency 空间频率

Test frequency 试验频率

stockout frequency 缺货频率

倍频器 [bèi pín qì] /frequency multiplier/

变频 [biàn pín] /frequency conversion/

次数 [cì shù] /frequency/number of times/

率 [lǜ] /rate/frequency/

频 [pín] /frequency/frequently/repetitious/

频带 [pín dài] /frequency range/bandwidth/

频道 [pín dào] /frequency/(television) channel/

频宽 [pín kuān] /frequency range/bandwidth/

频率 [pín lǜ] /frequency/

射频 [shè pín] /radio frequency/RF/

{adj: broadband, wideband} responding to or operating at a wide band of frequencies
"a broadband antenna"

{adj: high, high-pitched} used of sounds and voices; high in pitch or frequency
<-> low

{adj: infrasonic} having frequencies below those of audible sound

{adj: low, low-pitched} used of sounds and voices; low in pitch or frequency
<-> high

{adj: multiphase, polyphase} of an electrical system that uses or generates two or more alternating voltages of the same frequency but differing in phase angle

{adj: resonant} inducing resonance
"resonant frequency"

{adj: silent} having a frequency below or above the range of human audibility
"a silent dog whistle"

{adj: supersonic, ultrasonic} having frequencies above those of audible sound

{adv: inversely, reciprocally} in an inverse or contrary manner
"inversely related"
"wavelength and frequency are, of course, related reciprocally"- F.A.Geldard

{n: Braxton-Hicks contraction, false labor} painless contractions of the muscles of the uterus that continue throughout pregnancy with increasing frequency

{n: D-layer, D region} the lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves

{n: Doppler effect, Doppler shift} change in the apparent frequency of a wave as observer and source move toward or away from each other

{n: Nyquist frequency} (telecommunication) twice the maximum frequency occurring in the transmitted signal

{n: Planck's constant, h} the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second

{n: Planck's law} (physics) the basis of quantum theory; the energy of electromagnetic waves is contained in indivisible quanta that have to be radiated or absorbed as a whole; the magnitude is proportional to frequency where the constant of proportionality is give by Planck's constant

{n: Tesla coil} a step-up transformer with an air core; used to produce high voltages at high frequencies

{n: acorn tube} a small vacuum tube; used at high frequencies

{n: alpha rhythm, alpha wave} the normal brainwave in the electroencephalogram of a person who is awake but relaxed; occurs with a frequency of 8-12 hertz

{n: ammonia clock} an atomic clock based on vibrational frequency of the nitrogen atom in the ammonia molecule

{n: attendance} the frequency with which a person is present
"a student's attendance is an important factor in her grade"

{n: audio, audio frequency} an audible acoustic wave frequency

{n: band} a range of frequencies between two limits

{n: barrage jamming} electronic jamming over a wide range of frequencies simultaneously

{n: beat} a single pulsation of an oscillation produced by adding two waves of different frequencies; has a frequency equal to the difference between the two oscillations

{n: beta rhythm, beta wave} the normal brainwave in the encephalogram of a person who is awake and alert; occurs with a frequency between 12 and 30 hertz

{n: bypass condenser, bypass capacitor} a capacitor that provides low impedance over certain (high) frequencies

{n: coaxial cable, coax, coax cable} a transmission line for high-frequency signals

{n: cosmotron} a large proton synchrotron; uses frequency modulation of an electric field to accelerate protons

{n: count per minute, counts/minute} frequency per minute

{n: crystal oscillator, quartz oscillator} an oscillator that produces electrical oscillations at a frequency determined by the physical characteristics of a piezoelectric quartz crystal

{n: degree of freedom} (statistics) an unrestricted variable in a frequency distribution

{n: delta rhythm, delta wave} the normal brainwave in the encephalogram of a person in deep dreamless sleep; occurs with high voltage and low frequency (1 to 4 hertz)

{n: diathermy} a method of physical therapy that involves generating local heat in body tissues by high-frequency electromagnetic currents

{n: dielectric heating} heating of an insulator by a high-frequency electric field

{n: dish, dish aerial, dish antenna, saucer} directional antenna consisting of a parabolic reflector for microwave or radio frequency radiation

{n: distribution, statistical distribution} (statistics) an arrangement of values of a variable showing their observed or theoretical frequency of occurrence

{n: doubler} an electronic device that doubles the voltage or the frequency of an input signal

{n: electromagnetic spectrum} the entire frequency range of electromagnetic waves

{n: electronic converter} (telecommunication) converter for converting a signal from one frequency to another

{n: elves} an acronym for emissions of light and very low frequency perturbations due to electromagnetic pulse sources; extremely bright extremely short (less than a msec) electrical flashes forming a huge ring (up to 400 km diameter) in the ionosphere

{n: equalizer, equaliser} electronic equipment that reduces frequency distortion

{n: equidistribution} a flat distribution having equal frequencies of occurrence

{n: ethernet} a type of networking technology for local area networks; coaxial cable carries radio frequency signals between computers at a rate of 10 megabits per second

{n: extremely high frequency, EHF} 30 to 300 gigahertz

{n: extremely low frequency, ELF} below 3 kilohertz

{n: filter} an electrical device that alters the frequency spectrum of signals passing through it

{n: frequency band, waveband} a band of adjacent radio frequencies (e.g., assigned for transmitting radio or television signals)

{n: frequency distribution} a distribution of observed frequencies of occurrence of the values of a variable

{n: frequency modulation, FM} modulation of the frequency of the (radio) carrier wave

{n: frequency response} (electronics) a response depicting the output-to-input ratio of a transducer as a function of frequency

{n: frequency, absolute frequency} the number of observations in a given statistical category

{n: frequency, frequence, oftenness} the number of occurrences within a given time period
"the frequency of modulation was 40 cycles per second"
"the frequency of his seizures increased as he grew older"

{n: frequency, relative frequency} the ratio of the number of observations in a statistical category to the total number of observations

{n: frequency-response curve, frequency-response characteristic} (electronics) a graph of frequency response with signal amplitude or gain plotted against frequency

{n: fundamental, fundamental frequency, first harmonic} the lowest tone of a harmonic series

{n: harmonic} any of a series of musical tones whose frequencies are integral multiples of the frequency of a fundamental

{n: hertz, Hz, cycle per second, cycles/second, cps, cycle} the unit of frequency; one hertz has a periodic interval of one second

{n: heterodyne receiver, superheterodyne receiver, superhet} a radio receiver that combines a locally generated frequency with the carrier frequency to produce a supersonic signal that is demodulated and amplified

{n: high frequency, HF} 3 to 30 megahertz

{n: high pitch, high frequency} a pitch that is perceived as above other pitches
<-> low pitch

{n: high-pass filter} a filter that passes frequencies above a certain value and attenuates frequencies below that value

{n: histogram} a bar chart representing a frequency distribution; heights of the bars represent observed frequencies

{n: incidence, relative incidence} the relative frequency of occurrence of something

{n: infrared, infrared frequency} the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
"they could sense radiation in the infrared"

{n: line} a single frequency (or very narrow band) of radiation in a spectrum

{n: long wave} a radio wave with a wavelength longer than a kilometer (a frequency below 300 kilohertz)

{n: low frequency, LF} 30 to 300 kilohertz

{n: low pitch, low frequency} a pitch that is perceived as below other pitches
<-> high pitch

{n: low-pass filter} a filter that passes frequencies below a certain value and attenuates frequencies above that value

{n: magnetic resonance} resonance of electrons or atoms or molecules or nuclei to radiation frequencies as a result of space quantization in a magnetic field

{n: medium frequency, MF} 300 to 3000 kilohertz

{n: medium wave} a radio wave with a wavelength between 100 and 1000 meters (a frequency between 300 kilohertz and 3000 kilohertz)

{n: modulation} (electronics) the transmission of a signal by using it to vary a carrier wave; changing the carrier's amplitude or frequency or phase

{n: neon lamp, neon induction lamp, neon tube} a lamp consisting of a small gas-discharge tube containing neon at low pressure; luminescence is produced by the action of currents at high frequencies that are wrapped a few turns around the tube

{n: overtone, partial, partial tone} a harmonic with a frequency that is a multiple of the fundamental frequency

{n: pitch pipe} a small pipe sounding a tone of standard frequency; used to establish the starting pitch for unaccompanied singing

{n: pitch} the property of sound that varies with variation in the frequency of vibration

{n: quartz crystal} a thin plate or small rod of quartz cut along certain lines and ground so that it can produce an electric signal at a constant frequency; used in crystal oscillators

{n: radio frequency} an electromagnetic wave frequency between audio and infrared

{n: radio spectrum, radio-frequency spectrum} the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television

{n: radio telescope, radio reflector} astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extraterrestrial sources

{n: rate} a magnitude or frequency relative to a time unit
"they traveled at a rate of 55 miles per hour"
"the rate of change was faster than expected"

{n: resonance} a vibration of large amplitude produced by a relatively small vibration near the same frequency of vibration as the natural frequency of the resonating system

{n: sampling frequency} (telecommunication) the frequency of sampling a continuously varying signal

{n: sampling rate} (telecommunication) the frequency of sampling per unit time

{n: scanner, electronic scanner} a radio receiver that moves automatically across some selected range of frequencies looking for some signal or condition
"they used scanners to monitor police radio channels"

{n: short wave} a radio wave with a wavelength less than 100 meters (a frequency greater than 3 megahertz)

{n: skin effect} the tendency of high-frequency alternating current to distribute near the surface of a conductor

{n: skip distance} the shortest distance that permits radio signals (of a given frequency) to travel from the transmitter to the receiver by reflection from the ionosphere

{n: sonogram, echogram} an image of a structure that is produced by ultrasonography (reflections of high-frequency sound waves); used to observe fetal growth or to study bodily organs

{n: sonography, ultrasonography, echography, ultrasound} using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs

{n: sound spectrum, acoustic spectrum} the distribution of energy as a function of frequency for a particular sound source

{n: spectrum line} an isolated component of a spectrum formed by radiation at a uniform frequency

{n: spot jamming, selective jamming} electronic jamming of a specific channel or frequency

{n: superhigh frequency, SHF} 3 to 30 gigahertz

{n: synchrocyclotron} cyclotron that achieves relativistic velocities by modulating the frequency of the accelerating electric field

{n: synchronous motor} electric motor in which the speed of rotation is proportional to the frequency of the A.C. power

{n: synchrotron} cyclotron in which the electric field is maintained at a constant frequency

{n: system clock} an electronic device in a computer that issues a steady high-frequency signal that synchronizes all the internal components

{n: television antenna, tv-antenna} an omnidirectional antenna tuned to the broadcast frequencies assigned to television

{n: theta rhythm, theta wave} the normal brainwave in the encephalogram of a person who is awake but relaxed and drowsy; occurs with low frequency and low amplitude

{n: tone, pure tone} a steady sound without overtones
"they tested his hearing with pure tones of different frequencies"

{n: tune} the adjustment of a radio receiver or other circuit to a required frequency

{n: tuning} (music) calibrating something (an instrument or electronic circuit) to a standard frequency

{n: tweeter} a loudspeaker that reproduces higher audio frequency sounds
"the sound system had both tweeters and woofers"

{n: ultrahigh frequency, UHF} 300 to 3000 megahertz

{n: ultrasound} very high frequency sound; used in ultrasonography

{n: very high frequency, VHF} 30 to 300 megahertz

{n: very low frequency, VLF} 3 to 30 kilohertz

{n: weight, weighting} (statistics) a coefficient assigned to elements of a frequency distribution in order to represent their relative importance

{n: white noise} a `sh' noise produced by a stimulus containing all audible frequencies of vibration

{n: wind rose} weather map showing the frequency and strength of winds from different directions

{n: wireless local area network, WLAN, wireless fidelity, WiFi} a local area network that uses high frequency radio signals to transmit and receive data over distances of a few hundred feet; uses ethernet protocol

{n: woofer} a loudspeaker that reproduces lower audio frequency sounds

{n: writing} (usually plural) the collected work of an author
"the idea occurs with increasing frequency in Hemingway's writings"

{v: barrage jam} jam an entire frequency sprectrum
"During the Cold War, the Soviets routinely barrage jammed to interfere with transmissions from the West"

{v: blanket jam} jam a broad-spectrum of frequencies to effect all communications in the area except for directional antenna communications

{v: heterodyne} combine (a radio frequency wave) with a locally generated wave of a different frequency so as to produce a new frequency equal to the sum or the difference between the two

{v: hunt} oscillate about a desired speed, position, or state to an undesirable extent
"The oscillator hunts about the correct frequency"

{v: modulate} vary the frequency, amplitude, phase, or other characteristic of (electromagnetic waves)

{v: point jam} jam a narrow band of frequencies
"We can counter point-jamming effectively"

{v: quaver, waver} give off unsteady sounds, alternating in amplitude or frequency

{v: spot jam} jam a single frequency
"This operator is spot-jammed"

Even so, with a frequency of mitrochrondrial disease of one in 20,000, the procedural risk greatly outweighs the benefit.
即便如此,由于线粒体病的出现率是二万分之一,程序上的风险要远远大于从中所得的益处。

The need to be tethered is disappearing for two reasons: better battery technologies( and less power-hungry devices) and improved use of radio frequencies( or RFs).
有两方面的原因使得有线连接将消失:更好的电池技术(以及对电源需求更小的装置)和对无线电频率使用的改进。

On July 23, Arecibo directed a powerful high-frequency radio beam toward SOHO's last location, 1.6 million km away. 7月 23日,阿雷西沃向 160万公里外太阳观测卫星最后的位置发射了强力的高频射电波束。

Echolocating bats emit sounds in patterns—characteristic of each species—that contain both frequency-modulated (FM) and constant-frequency (CF) signals.
具有回声定位机能的蝙蝠以特定的模式发出声音——为每一种蝙蝠所独有——这些声音包含调频(FM,frequency-modulated)信号和恒频(CF,constant-frequency)信号。

The FM signals report information about target characteristics that modify the timing and the fine frequency structure, or spectrum, of echoes—for example, the target's size, shape, texture, surface structure, and direction in space.
调频信号所报告的是有关目标物特征的信息,这些特征修改回声的时间控制(timing)以及回声的精细频率结构,或射频频谱——例如,目标物的大小,形状,质地,表层结构,以及空间方向。

Responding to changes in the CF echo's frequency, bats of some species correct in flight for the direction and velocity of their moving prey.
通过对调频回声频率中的变化作出反应,某些种类的蝙蝠在飞行过程中可作出纠正,以追综其运动中的捕食物的方向及速度。

Note: The radio frequency range is 87.5~108MHz.
注:收音频率为:87.5~108MHz。

At a news briefing, State Department Spokesman Richard Boucher said details of the structure and frequency of the U.S.-Chinese talks are still to be worked out, though they will be chaired on the U.S. side by Deputy Secretary of State Robert Zoellick.
美国国务院发言人鲍彻在一次新闻简报会上说,美中会谈的具体结构和次数仍在磋商中。美国方面将由美国助理国务卿佐利克主持。

高震按摩仪high frequency massage

震荡 frequency

high-frequency discharge lamp 高频放电管

HS85184000
Audio-frequency electric amplifiers
音频扩大器

HS87059051
Aeroplane charging vehicles (frequency 400Hz)
航空电源车(频率为400赫兹)

HS90304010
Frequency meters, digital, measuring range<12.4GHz
测试频率在12.4千兆赫兹以下的数字式频率计

spsc-26121623
Radio frequency RF cable
无线电缆

spsc-32101500
Circuit assemblies and radio frequency RF components
印刷电路集成和无线电射频零件

spsc-32101521
Radio frequency RF filters
无线电电波射频过滤

spsc-32111510
Radio frequency RF diodes
射频二极管

spsc-32111607
Bipolar darlington or radio frequency RF transistors
双极复合晶体管和射频晶体管

spsc-39121007
Frequency converters
变频器

spsc-39121433
Radio frequency RF connectors
射频连接器

spsc-39121532
Radio frequency RF switches
射频开关

spsc-41113647
Frequency calibrator or simulator
频率校准器和模拟器

spsc-41115303
Frequency analyzers
频率分析器

spsc-41115304
Frequency counters or timer or dividers
频率计数器和分时器

spsc-41115305
Electrical frequency meters
电子频率计

spsc-42272207
High frequency ventilators
高频呼吸机

spsc-43211710
Radio frequency identification devices
射频识别设备

spsc-43221721
Radio frequency data communication equipment
射频数据通信设备

spsc-52161522
Radio frequency scanners
无线电频率扫描

spsc-52161523
Radio frequency transmitters or receivers
射频传输和接收器

F45.3
Somatoform autonomic dysfunction
Symptoms are presented by the patient as if they were due to a physical disorder of a
system or organ that is largely or completely under autonomic innervation and control,
i.e. the cardiovascular, gastrointestinal, respiratory and urogenital systems. The
symptoms are usually of two types, neither of which indicates a physical disorder of the
organ or system concerned. First, there are complaints based upon objective signs of
autonomic arousal, such as palpitations, sweating, flushing, tremor, and expression of
fear and distress about the possibility of a physical disorder. Second, there are
subjective complaints of a nonspecific or changing nature such as fleeting aches and
pains, sensations of burning, heaviness, tightness, and feelings of being bloated or
distended, which are referred by the patient to a specific organ or Cardiac neurosis
Da Costa's syndrome
Gastric neurosis
Neurocirculatory asthenia
Psychogenic forms of:
. aerophagy
. cough
. diarrhoea
. dyspepsia
. dysuria
. flatulence
. hiccough
. hyperventilation
. increased frequency of micturition
. irritable bowel syndrome
. pylorospasm
Excludes: psychological and behavioural factors associated with disorders or diseases
classified elsewhere (F54)
自主神经功能拟身体障碍症 :
这类病人的症状表现与大多或完全由自律神经控制
的系统或器官产生的身体疾患很像 , 例如心脏血管
、胃肠、呼吸系统及泌尿生殖系统。这些症状分成
两型 , 均无具身体器质障碍 : 第一、自主神经高亢
表现之客观身体徵象 , 如心悸、盗汗、脸红、及颤
抖等 , 这些症状被患者认定有身体疾病 , 有感到害
怕与困扰。第二、属於比较非特异性、非特定性的
症状 , 如短暂的疼痛感、发烧感、沈重感、紧绷及
膨胀扩大感 ; 而病人大多会指出某一系统或器官引
起的疾病。
心脏精神官能症
Da Costa 氏徵候群
胃精神官能症
神经循环虚弱
心因性 :
. 吞气症
. 咳嗽
. 下痢
. 消化不良
. 解尿困难
. 肠气
. 打嗝
. 过度换气症
. 频尿
. 肠道快速蠕动症
. 幽门痉挛
不包含 : 与他处已归类疾患相关的心理及行为因素
(F54) 。

F98
Other behavioural and emotional disorders with onset usually occurring
in childhood and adolescence
A heterogeneous group of disorders that share the characteristic of an onset in childhood
but otherwise differ in many respects. Some of the conditions represent well-defined
syndromes but others are no more than symptom complexes that need inclusion because of
their frequency and association with psychosocial problems, and because they cannot be
incorporated into other syndromes.
Excludes: breath-holding spells (R06.8)
gender identity disorder of childhood (F64.2)
Kleine-Levin syndrome (G47.8)
obsessive-compulsive disorder (F42.-)
sleep disorders due to emotional causes (F51.-)
发生於儿童期或少年期之其他行为与情绪障碍症
不包含 : 闭气发作 (R06.8)
儿童期性别认同障碍症 (F64.2)
克莱 - 雷温徵候群 ( 多睡及多食症 ) (G47.8)
强迫症 (F42.-)
睡眠障碍症 (F51.-)

H91.9
Hearing loss, unspecified
Deafness:
. NOS
. high frequency
. low frequency
听障 , 未明示者
耳聋 :
. 其他未明示之耳聋
. 高频耳聋
. 低频耳聋

R35
Polyuria
Frequency of micturition
Nocturia
Excludes: psychogenic polyuria (F45.3)
多尿
频尿
夜尿
不包含 : 心因性多尿 (F45.3)

稳频激光 Frequency Stabilized Lasers

基频传输特性检测器 Baseband Frequency Characteristics Evaluation Equipment

cumulative frequency 累积频率;累积频数

frequency distribution 频数分布;频率分布

frequency 频率

frequency control of motor speed 变频调速

frequency converters 变频器

frequency of vibration 振动频率

angular frequency 角频率

apparent frequency 表观频率,视频率

audible frequency range 听频范围

audio frequency 声频

beat frequency 拍频

driver frequency 驱动频率

frequency 频率

frequency modulation 调频,频率调制

frequency response 频率响应

fundamental frequency 基频

low frequency a.c. generator 低频交流发电机

mains frequency 市电频率

natural frequency 固有频率,自然频率

radio frequency 射频,无线电广播频率

resonant frequency 共振频率

strobe frequency 闪频

threshold frequency 临阈频率

ultra high frequency 超高频

very high frequency 甚高频

amino acid frequency 氨基酸(使用)频率

dinucleotide frequency 二核苷酸频率

频率响应 frequency response

响应频率 response frequency

acoustical frequency electric 声频大地电场仪

anti-coupling bi-frequency induced polarization instrument 抗耦双频激电仪

antiresonance frequency 反共振频率

audio-frequency spectrometer 声频频谱仪

basic NMR frequency 基本核磁共振频率

beat frequency oscillator 拍频振荡器

cut-off frequency 截止频率

crossover frequency 交越频率

damped frequency 阻尼频率

damped natural frequency 阻尼固有频率

digital frequency meter 数字频率表

directional frequency response of microphone 传声器指向性频率响应

dominant frequency 优势频率;主频率

eigen frequency 特征频率

electrical resonance frequency of the miving element 运动部件电谐振频率

energizing frequency 激励频率

field-frequency lock 场频锁

rixed-based natural frequency 固定基础固有频率

free-field frequency response of microphone 传声器自由声场频率响应

frequency 频率

frequency-amplitude characteristic 幅频特性

frequency analysis 频率分析

frequency analyzer 频率分析仪

frequency band 频带

frequency distrbution 频率分布

frequency division multiplexing 频分多路传输

frequency domain 频域

frequency domain analysis 频域分析

frequency domain method 频域法

frequency domain model reduction method 频域模型降价法

frequency index 频率指数

frequency measurement by comparison with time scale 时标比较法测频

frequency measurement by digital meter 用数字频率计测频

frequency measurement by Lissajou's figure 用李沙育图形测频

frequency measurement by stroboscope 闪光测频

frequency measurement by vibrationg reed indicator 用舌簧频率计测频

frequency meter 频率表

frequency modulation(FM) 频率周制,调频

frequency of the natural hydraulic mode 液压固有频率

frequency output 频率输出

frequency-phase characteristic 相频特性

frequency response 频率响应

frequency response characteristics 频率响应特性(图)

frequency reponse locus 频率响应轨迹图

frequency response of microphone 传声器频率响应

frequency response range 频率响应范围

frequency resonse tracer 频率响应显示仪

frequency shift keying(FSK) 频移键控

frequency shift magnetometer 频移磁强计

frequency sounding instrument 频率测深仪

frequency spectra induced polarization instrument 频谱激电仪

frequency stabilization 频率稳定


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