physical optics 中文意思是什麼
physical optics
解釋
物理光學-
Cubic boron nitride ( cbn ) is a synthesized wide - band - gap iii - v compound semiconductor and has lots of excellent physical and chemical properties. it has been attracted a nice bit of attention for years because of its application in mechanics, calorifics, optics and electronics
立方氮化硼（ cbn ）是一種人工合成的寬帶隙-族化合物半導體材料，它有許多優異的物理化學性質，在力學、熱學、光學、電子學等方面有著非常誘人的應用前景，多年來一直吸引著國內外眾多研究者的興趣。 -
The model is based on the theory of physical optics ( po ), geometry theory of diffraction ( gtd ) and uniform theory of diffraction ( utd ), and it can compute and analyze the propagation of em wave in microcellular environments by using improved ray tracing method
該模型基於物理光學（ po ） 、幾何繞射理論（ gtd ） 、一致性繞射理論（ utd ） ，利用改進的射線跟蹤法對微蜂窩中電波傳播特性進行了數值分析計算。 -
This part of the subject is called physical optics.
這部分內容叫做物理光學。 -
Abstract : it is observed that the sommerfeld ' s formula for a progressive spherical wave is not covariant with respectro the rotation of the coordinate system. it contains complex partial waves that are not physical. the standing wave representation of the same formula is shown to be covariant and physical. it is applied to solve the boundary value problem of fiber optics. the radiation modes as well as the guided normal modes are obtained in closed forms. the intensity distribution in various modes is obtained. it is remarked that the mode of critical refraction is missing
文摘:說明了球面行波的索末菲公式在坐標轉動下不協變.證明了球面波的駐波表示是協變的，因而是一個物理的關系式，故適用於圓柱坐標中各類波動方程的定解問題.作為一個例，應用於光纖光學，導出了受導簡正模和輻射模的表達式，以及各模式的強度分佈 -
Iterative physical optics is extended to the analysis of electromagnetic scattering by dielectric coated targets. the theoretical model of the extended ipo is formulated by fresnel reflection coefficient. it is applied to analyze the scattering by geometrically simple, electrically large, dielectric coated cavities
將迭代物理光學（ ipo ）法推廣到非完純導體邊界目標的電磁散射特性分析中，建立了具有阻抗邊界的ipo理論模型，並應用這種推廣的ipo方法分析幾何結構簡單的電大尺寸介質塗敷腔體的電磁散射特性。 -
The combination of fdtd method with physical optics is also used to analyze paraboloidal reflector antenna in millimeter band. using fdtd method, we obtains precise near fields of the feed because the computing areas include all the feed structure. the current on the paraboloidal reflector can be calculated by using physical optics, and then the far field of reflector can be calculated
在毫米波拋物面天線的分析計算中，把fdtd與物理光學法結合起來， fdtd用於具有精細結構的饋源及饋電波導一體計算，得到饋源的幅度和相位方向圖，以此為依據調整饋源結構，使饋源的幅度和相位方向圖為最佳狀態。 -
In this paper, in the course of studying the physical principles of electro - optics effect of bso, the characteristic of bso and ( the planar electric field image ) is analyzed thoroughly on the based of swing modulate theory
本論文在對bso晶體電光效應物理機理的研究中，從晶體的振幅調制理論出發，對bso晶體特性以及bso晶體內形成二維電場圖像進行了深入的分析。 -
At present greco is regarded as one of the most valuable methods of radar cross section ( rcs ) computation in the high - frequency region. depending on these conditions, several researches have been completed in this paper : firstly, calculating rcs of complex conducting targets has been accomplished by greco method. the high - frequency rcs of targets are obtained through physical optics ( po ) and incremental length diffraction coefficients ( ildc ) respectively
本論文做了以下研究工作：首先，實現了運用greco方法計算了高頻區理想導體復雜目標的雷達散射截面（ rcs ） ，分別應用了物理光學法（ po ）和增量長度繞射系數法（ ildc ）計算了目標的面元和棱邊的電磁散射，最後綜合面元與棱邊的散射效應得到目標的總rcs 。 -
On the aspect of the research of the rcs computation methods, this dissertation did many work as : it discussed the application of the stationary phase method for the integral of the physical optics and gave the expressions of the stationary phase method based bezier surface for the perfect conduct and coated target ; focused on the application of the stationary phase method, it discussed some important techniques such as the searching of the stationary phase method and the handling of the singularity ; it also discuss the application of the gauss method for verifying the correction of the stationary phase method, and gave their compares of the efficiency and the precision
在rcs演算法研究方面，本文做了以下研究：討論了在bezier曲面上物理光學積分的駐相法求解，給出了bezier曲面上理想導體和塗敷目標駐相公式；圍繞駐相法的應用，討論了駐相法應用中的一些關鍵的技術問題，包括駐相點的搜索、駐相法的奇異性；為了檢驗駐相法的精度，還討論了gauss積分的應用，給出了兩種方法計算效率和精度的比較。 -
This technique combines the edge - based finite - element method with physical optics ( po ) and physical theory of diffraction ( ptd ). the hybrid technique is applied to compute the scattering fields from the electrically large bodies with cracks and cavities on their surfaces. it is also used to analyze the scattering characteristics of microstrip antennas residing in a cavity mounted on metal objects with finite sizes
本文採用edge - basedfem為基本方法，結合物理光學法（ po ） 、物理繞射理論（ ptd ） 、邊界積分方程（ bi ） 、區域分解技術（ ddm ）和完全匹配層（ pml ）吸收邊界條件等求解方法構成的混合方法，對電磁散射和輻射問題進行了研究，主要包括以下內容：提出了一種edge - basedfem與物理光學方法和物理繞射理論相結合的混合方法? fem po - ptd方法，並將該混合方法應用於帶有腔體或槽縫的電大尺寸導體目標的電磁散射特性分析和位於有限導體目標上的背腔式微帶貼片天線的電磁散射特性分析。 -
C / c + +, circuit analysis, analogous circuit, pulse and digital circuit, signal and system, physical optics, microcomputer principle andconnection technology, modern communication principle, informationtheory and code, guided waves optics, optical fiber technology andapplication
電路分析，模擬電路，脈沖與數字電路，信號與系統，物理光學，微機原理與介面技術，現代通訊原理，信息理論與編碼，導波光學，光纖技術及應用 -
While the new components having the same numbers with these original physical vectors are introduced and the new components are combined with those original physical components to form a new symplectic space, the ray problem of wave propagation in geometrical optics is converted into the problem of lagrange submanifold in the symplectic space
通過引入波向量（慢度向量） ，將物理空間中幾何光學的射線問題轉化為辛空間中的lagrange子流形（超曲面）問題。 -
Incremental length diffraction coefficients ( ildc ) is adopted to calculate the contribution of edge diffraction. in order to improve the accuracy of calculation, multi - scattering is discussed, based on the two former contributions and ray - tracing method. geometrical optics ( go ) and physical optics ( po ) are used to calculate the multi - reflection between facets and facets
對于鏡面反射採用物理光學法計算其散射貢獻，結合基於面元的目標模型的表示，採用離散的積分形式，將面電流積分化簡為線積分，簡化計算復雜度；對于邊緣繞射，運用增量長度繞射系數理論計算目標邊緣繞射場；在多次反射中，則以光線跟蹤方法為基礎，採用幾何光學、物理光學相結合的方法分析考慮多次散射場。 -
As a new technology and new mode in the next generation rear projection tv and hdtv, reflective lcd is the best way to realize bright light output and high contrast ratio image. in the forth chapter, the physical characteristics and electronic - optics behavior are studied, as well as the working principle and properties of lcds. following the continuum theory, the detail formulas for calculating the director alignment of perpendicular alignment and twist nematic lcds are given
高亮度、高解析度、高對比度以及體積小、重量輕、色彩豐富、圖像逼真始終是投影顯示技術的發展方向，在本部分，從亮度、解析度、重量和晶元闡述了投影機的技術發展趨勢，得出結論：反射式液晶投影顯示是實現高解析度高亮度投影顯示的最佳方案，也是新一代背投電視尤其是背投hdtv的最佳方案。 -
On one hand, although the traditional methods to solve the electromagnetic scattering form the target by the so called high frequency methods such as po ( physical optics ), go ( geometry optics ), have the less memory and computational requirement, they also have the fatal defection that the accuracy of these methods are too poor to use in real applications
一方面傳統的高頻電磁分析方法雖然計算較快，內存需求較低。但是其存在的致命缺陷是計算結果精度較低，在許多場合下的計算結果的精度遠遠不能達到應用的要求。另一方面基於積分方程的多層快速多極子方法是一種求解電磁散射問題的快速演算法。 -
Based on the concept of the rcs and the theory of the basic electromagnetic scattering, this dissertation discussed the application of the physical optics ( po ) to the rcs of bodies modeled with nurbs surfaces, and completed an integrate software with the display, transfer, shelter handling and modification of the models
本文圍繞復雜目標雷達截面（ rcs ） rcs的概念及基本電磁散射理論，討論了基於nurbs曲面模型的物理光學法的應用，同時完成了集模型顯示、修改、變換、消隱及rcs計算於一體的綜合軟體開發。 -
A numerical technique employing the method of moments ( mom ) and physical optics ( po ) is presented for studying the scattering from a planar slotted waveguide array antennas
利用矩量法和物理光學法分析了平板波導縫隙陣列天線的散射特性。 -
An idea to establish a cancellation database on the basis of the smooth of rcs of the protected target is also introduced the field scattered by facets and fringes and the multiple scattering effect are calculated by a hybridization of the theory of physical optics, equivalent currents and areal projection - physical optics, which are utilized to compute the rcs of an aeroplane
還提出了根據被保護目標rcs的平滑值確定對消數據庫的思想。應用物理光學法、等效電磁流法和區域投影物理光學方法計算了面元散射場、劈邊緣繞射場以及多次散射場，採用此方法計算了某飛機的rcs ，並對該目標的rcs進行了平滑處理。 -
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。 -
Aiming at efficient analyses of electromagnetic characteristics of electrically large complex cavities, some hybrid techniques are developed based on eb - fem, including ipo / fem, extended ipo, improved ipo / fem, ddm / fem - bie, ddm / fem - po - ptd, fem / ibc, and fem / pml. the following contributions have been made in this dissertation : a novel hybrid approach is proposed in which iterative physical optics ( ipo ) subdomain - splicing technique is combined with eb - fem, the mathematical model of the proposed ipo / fem is established by some approximate methods
本文以eb - fem為基礎，以電大尺寸復雜腔體的電磁特性為分析對象，對eb - fem與迭代物理光學法（ ipo ） 、區域分解法（ ddm ） 、阻抗邊界條件（ ibc ） 、完全匹配層（ pml ）和mur吸收邊界條件的結合演算法以及具有非完純導體邊界的ipo理論模型進行了研究。
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