preferred frequency 中文意思是什麼
preferred frequency
解釋
優選頻率-
To the principle of single - station high - frequency ground wave detection radar, simple pulse wave was chosen, but this wave has many limitations, so continuous signal wave was preferred
從雷達信號波形選擇來看，對于單站高頻地波超視距雷達體制，最初採用簡單脈沖波形。但這種波形存在著許多缺點，最終採用連續波信號體制。 -
Preferred frequencies, frequency levels, and band numbers for acoustical measurements
聲學測量的優先選擇頻率頻率級和頻帶數 -
The crystalline structure of film is as microcrystalline cubic phase p - sic and shows ( 111 ) preferred direction, the adsorption peak corresponds to the stretch frequency peak of si - c bond of p - sic
傅立葉變換紅外光譜（ ftir ）分析發現主吸收峰對應于- sic的si - c鍵的伸縮振動吸收。
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