first moment of the surface 中文意思是什麼

first moment of the surface 解釋
靜力表面矩
  • first : adj 1 最初的,最早的。2 最上等的,第一流的。3 基本的,概要的。4 高音(調)的。n 1 最初,第一;第...
  • moment : n 1 一轉眼功夫 片刻 瞬息 剎那;時刻。2 時機 機會;場合;危機;當前。3 重要 緊要;【哲學】要素 契...
  • of : OF =Old French 古法語。
  • the : 〈代表用法〉…那樣的東西,…那種東西。1 〈用單數普通名詞代表它的一類時(所謂代表的單數)〉 (a) 〈...
  • surface : n 1 表面;地面;水面;廣場,空地。2 外觀,外表,皮毛。3 【幾】面;切口;【航空】翼面。adj 表面的...
  1. First moment of the surface

    靜力表面矩
  2. The material ways are to model the honeycomb wall as an impredence surface, to express the infinite honeycomb by using periodic green ' s function, and using method of moment to establish the mathematic model, in applying the methods of moments, we choose the roof function as basic function and choose the razor function as test function ; by equating the incident field to sum of the scattering field and impledance field ; we will set up the integral equation for the surface current, solving it by mom equation. then gain it ' s reflected coefficient ' s numerical result. and we propose first the definition of the equivalent electromagnetic parameters and present a method to calculate them from the gained reflection coefficient

    具體方法就是將浸漬吸收劑的蜂窩壁用表面阻抗表示,將無限大的周期結構的電場用周期格林函數來表示,選取有耗蜂窩結構中具有代表性的基本計算單元應用矩量法建立數學模型,在運用矩量法時用屋頂函數作為基函數,刀片函數作為檢驗函數,根據蜂窩壁表面電場必須滿足入射電場等於散射電場和阻抗電場之和的規律,推導表面電場積分方程,求解蜂窩結構的表面電流,利用蜂窩的周期規律得到無限大均勻周期陣列的散射電場。
  3. First, the method of aperture integration - surface integration, which is based on physical optics theory, is used to study the radiating property of the 3 - d radome - enclosed antennas. secondly, the moment method is employed to analyze the electromagnetic radiation from radome - enclosed antennas with axi - symmetric revolving radome

    然後應用矩量法針對具有回轉體結構天線罩的帶罩天線輻射進行分析,分析過程中利用回轉體特點,採用適當的基函數將三維問題轉化成二維問題解決,以降低計算量提高計算效率。
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