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词汇
Noise Figure
释义
Noise Figure
杂讯指数
杂讯指数是在1940年代初期,由FaroldFriis工程师将它的计算公式定义为:杂讯指数的单位为dB,以RF或者微波元件输入端的信号对比杂讯(SNR),除以输出端的SNR,就是杂讯指数。SNR越大,信号越容易侦测,表示杂讯的强度越弱。
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bushwah
bushwhack
bushwhacker
bushy
busily
business
business administration
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business as principal (to principal)
business barometer
keening
keenly
keenness
keen on
keen-witted
keep
keep
keep
keep abreast of
keep abreast with
keep a diary
keep a foot in both camps
keep a low profile
keep an eye on
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