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汉语拼音：tiáo fú

使载波的频率保持不变，而它的振幅依照所需传递信号的变化规律而变化。

1. “振幅调制”的简称。使载波的振幅按照所需传送信号的变化规律而变化，但频率保持不变的调制方法。调幅在有线电或无线电通信和广播中应用甚广。

• However, even once scientists are able to measure the modulation, it isn't certain that we'll be able to understand the message.

  然而，尽管科学家们可以测量调幅，我们并不确定能够理解这些信息。

• To be sure that FM screening now and in the next few years is not possible to completely replace the amplitude-modulated screening.

  一不背可以肯不退的，调频增网长远和畴昔几年边不不定合座代替调幅增网。

• The structural analysis shows that the moment modulation method decreases the bearing capacity of plane frame structure.

  研究表明，梁端弯矩调幅将降低平面框架结构的极限受弯承载力。

• The proposed formulae for the moment redistribution ratio are valuable to the design of continuous composite beams.

  据此，对连续组合梁的负弯矩调幅系数提出了建议。

• The Voice of Firestone was the first commercial radio program to be carried simultaneously on both AM and FM radio stations.

  凡世通的声音是第一个商业电台节目，同时进行调幅和调频的广播电台。

• And for the frame beam end bending moment amplitude modulation factor seems embodiment its value in practice projects.

  框架梁端的弯矩调幅系数的合理取值的价值在实际工程中似乎更能体现出来。

• The error probability of binary AM is greater than of binary FM by a factor of at least 6.

  二进制调幅的误差概率比二进制调频至少大五倍。

• BROADCASTING AND TELECOMMUNICATION. DATA BROADCASTING SYSTEM COMPATIBLE WITH AM SOUND BROADCASTING.

  无线电广播和通讯.无线电调幅广播的协调数据扩散系统

• Sold under the company's new name, Sony, the radio used five transistors to tune in to multiple AM channels.

  收音机用公司的新名字索尼进行销售，用了五个晶体管收听多个调幅频道。