secondary diagonal 中文意思是什麼

secondary diagonal 解釋
【數學】次對角線。

  • secondary : adj 1 第二(位)的,第二次的;中級的 (opp primary)。2 副(的);從屬的;附屬的;輔助的;補充的...
  • diagonal : adj. 1. 對角線的。2. 斜的;斜紋的。n. 1. 【數學】對角線,對頂線。2. 斜紋布。adv. -ly 斜,斜對。
  1. The algorithms estimate the doa of the broadband distributed source fron the secondary diagonal elements of the covariance matrices generated from every frequency domain of the received broadband signals, thus avoiding unwrapping of phases

    該類演算法首先將陣列接收的寬帶信號變換到頻率域,然後對于每個頻率形成陣列接收信號協方差陣,最後由該協方差陣的次對角線元素估計寬帶分佈源的到達角,其主要特點是避免了相位展開。
  2. To minimize harmful diffraction effects, the secondary, or diagonal, mirror is generally only large enough to let the central portion of the focal plane receive light from the whole primary mirror

    為減小不利的衍射效應,副鏡,或平面鏡的大小隻是剛夠把主鏡在焦平面的像反射就行了。
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