调幅

本工作系统地研究了豚鼠△f（am）与载波频率、调制波频率、调幅深度、调幅时程、声音强度等的关系。

Δ fam in relation to the carrier and , modulator frequencies , to the depth and duration of amplitude modulation , and to sound intensity are systematically studied .

系统采用自动增益控制电路，并运用DDS技术实现调频、调幅，ASK、PSK等功能。

The system adopts AGC circuit , uses DDS technology to realize such functions as frequency modulation , amplitude modulation , ASK , PSK , etc.

具有报警功能的LED调幅表

The LED AM Modulation Rate Instrument with Alarm Function

并分析了调频、调幅、ASK调制时的频谱曲线。

The spectrum of FM , AM , ASK modulation is analyzed . 3 .

本文介绍了一种针对电台工作设计的LED调幅表。

This article introduced a LED AM modulation rate instrument designed for radio station .

基于DSP的调幅广播信号监测系统

Monitoring System for Amplitude Modulation Broadcasting Signal Based on DSP

Fe－1.83C马氏体调幅分解的TEM研究

A TEM study of spinodal decomposition in FE-1 . 83c martensite

含Si钢下贝氏体转变初期碳原子的调幅分解

Spinodal decomposition of carbon at initial stage of lower bainite transformation in a Si-containing steel

面心立方合金调幅分解与有序化的X射线和透射电镜衍射研究

Investigation of X ray and TEM diffraction of spinodal decomposition and ordering for Cu 4wt % Ti alloy

目前各国学者不但研究了各海区C.对预应力混凝土超静定结构弯矩调幅的分析

The study of C. Study on Moment Redistribution of Statically Indeterminate Structures of PPC

最后提出连系梁弯矩调幅系数（K）的建议值，供工程实践选用。

In conclusion it recommends the amplitude modulation coefficient K of ben - ding beam for use in engineering practice .

符合FCC标准的单片调频调幅电路的研发

Research and Development of a Monolithic AM / FM Circuit up to FCC Standard

同时应用图形热力学对Cu－Ti合金分解过程中调幅分解与有序化共存的现象进行了解释。

The coexisting of spinodal and ordering in Cu Ti alloys has been interpreted according to the graphic thermodynamics .

Walsh平面上调幅Hilbert变换的一致有界性

On the uniform boundedness of modulating Hilbert transforms on Walsh phase plane

研制了以DSP为控制核心的调幅式电感位移传感器精密测量系统，并对其进行实验验证。

Also this paper designs the amplitude-modulation inductive displacement transducer signal measuring system controlled by DSP , and carries out experiments on it .

浅析DRM数字调幅广播技术与应用

Brief Introduction to Technology and Application of DRM Arithmetic Figure Broadcast

逆向弯矩调幅法用于FRP补强框架梁极限抗弯承载力的探讨

Discussion of Reverse Bending Moment Adjust Method in FRP Reinforcing Ultimate Bearing Bending Moment of Frame Beams

数字音频广播，简称DAB（DigitalAudioBroadcasting），是继调幅和调频广播之后的新一代广播体系。

DAB ( Digital Audio Broadcasting ) is a new generation broadcast system after amplitude modulation broadcast and frequency modulation broadcast .

PPC超静定结构弯矩调幅限值及方法的研究

Study of Moment Modification of Partially Prestressed Concrete Hyperstatic Structures

提出了二维Walsh函数正交平衡调幅制。

The two dimensional orthogonal balanced modulation system of Walsh function has been introduced .

商业调幅电台的运作频率范围为535千赫（kHz）到1605千赫。

Commercial AM stations operate in the frequency range of 535 to 1605 kHz .

这种被噪声污染了的信号倍频后，通常调幅噪声的频宽扩大N倍（N为倍频次数）；

After doubling the frequency of noise-polluted signal , the bandwidth of AM noise is often extended by a factor of N ( N-number of doubling fre - quency ) .

AML是一种宽带、高线性、大容量的传送电视节目的调幅、定向辐射的多路微波传输系统。

AML , Amplitude Modulated Link , can broadcast large capacity of TV programs through high linearity broadband .

用x射线衍射发现，工业纯铁氮化后时效将引起ε→α〃→γ′转变，ε相具有调幅结构。

We have discovered by X-ray diffraction that the aging of commerical pure iron will lead to the phase transformation ε→α″→(?) after ion-nitriding . The e phase is of spinodal structure .

随机调幅Rattling振动的二级传动模型

Two-Stage Model on Rattling Vibration with Stochastic Amplitude

介绍了用正弦脉宽调制（SPWM）技术实现调频调幅输出的串联谐振式电源的工作原理。

It introduces the operation principle of serial resonance power supply adopting SPWM technique to realize frequency / amplitude modulation .

在通讯中调幅调频（AM/FM）信号和其他相位调制信号均可以通过对信号的相位做多项式展开，利用有限阶的多项式相位信号（Polynomialphasesignal，PPS）来近似逼近。

In communications , AM / FM signal and other Phase-Modulated signals can be expanded to the high polynomial phase signal ( PPS ) and be approximated by finite order PPS .

介绍了8mm调频调幅噪声测试设备的原理和设计，给出了完整的测试数据和误差分析。

A 8mm waveband FM and AM noise measuring equipment is introduced in this paper .

在EEG诊断正常的病例中，有60%的病员显示α波的调幅，对称性较健康人差，呈弥漫性α波表现。

In the normal EEG , 60 % cases whose alpha waves showed that the modulation symmetry was poorer than the healthy persons , having diffuse alpha waves .

数字调幅广播的DRM与IBOC技术

The technology of DRM and IBOC for digital AM broadcasting