pnm 中文意思是什麼
pnm
解釋
脈沖密度調制-
As analyzing the electromagnetic scattering characteristics of two - dimensional electrically large conducting objects, the object is divided into some small regions by using spatial decomposition technique ( sdt ), but still consider the coupling effect among all the regions, the surface current and rcs of the object can be computed with progressive iterative numerical method ( pnm ). then the wide - band electromagnetic scattering characteristics of two - dimensional electrically large conducting objects are analyzed with the asymptotic waveform evaluation ( awe ) technique
文中應用空間分解技術（ sdt ）將二維電大導體目標在空間中分解為若干子區域，考慮子區域間的耦合，採用累進迭代方法（ pnm ）快速計算表面電流和雷達散射截面，然後與漸近波形估計技術（ awe ）結合分析了二維電大導體目標的寬帶電磁散射特性。 -
Pnm pulse number modulation
脈沖數調制 -
Then an efficient and more accurate nonlinear finite element procedure based on the plastic node method ( pnm ) by combining elastic large displacement analysis theories with a plastic hinge model is presented to analyze the ultimate strength, directly accounting for the geometrical and material non - linearity and the influence of initial deformation and residual stress
然後採用塑性節點法，考慮結構的幾何非線性和材料的非線性雙重以及各缺陷因素影響，分析了不對稱船體結構的極限強度。通過與實驗值的比較，說明簡化方法與塑性節點法都能較準確預報極限強度。
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