gaussian plane 中文意思是什麼
gaussian plane
解釋
復數平面-
In the section 3, we calculated the threshold and efficiency of double resonance oscillator ( dro ) in plane wave of clbo ; we also got the efficiency curves of clbo in gaussian beam
第三章分析和數值模擬計算了平面波雙諧振情況下clbo晶體的振蕩閾值和轉換效率曲線，同時給出了高斯光束的轉換效率曲線並與bbo晶體進行了比較。 -
And then, in this part, following the idea of topping [ 51, 52 ], we will show an isoperimetric inequality ( 6. 3. 1 ) on surfaces of non - positive gaussian curvature by means of the curve shortening flow on surfaces, this inequality can be considered as a generalization of the banchoff - pohl inequality in the euclidean plane
然後，仿照topping [ 51 ]和[ 52 ]利用平均曲率流證明等周不等式的想法，我們利用曲面上的曲線縮短流在gauss曲率非正的曲面上證明了一個等周不等式（ 6 -
The conformal microstrip antenna with some unique character has been applied in many fields, especialy on speedy objects. in this paper, an efficient fdtd algorithm is introduced to analyse the microstrip antenna. firstly, the fdtd formula in descartes coordinate system and in cylindrical coordinate system are obtained from the time _ dependent maxwell equations using the yee algorithm in a calculating region where the dielectric parameters are independent of time and space. the choice of the space discretization units and the time discretization interval are discussed which are decided by the accuracy and stability respectively. the shape and setup of the excitation source are discussed too. the excitation source is chosen to be gaussian pulse in shape. secondly, the mur ' s first - order and second - order boundary condition are deduced in cylindrical coordinate system. the methods of transforming radiation fields from near zone to far zone in the frequency domain and in the time domain are presented when fdtd is applied to analyse the characteristics of far zone. finally, three kinds of microstrip antennas are analysed. they are a slot antenna that lies on a plane ground of a microstrip, a slot antenna that lies on a cylindrical ground of a microstrip and a microstrip line _ fed aperture coupled stacked rectangular patch antenna in cylindrical coordinate system
本文從麥克斯韋旋度方程出發，建立了笛卡兒坐標下無源空間中均勻無耗媒質的fdtd基本方程和圓柱坐標下無源空間中均勻無耗媒質的fdtd基本方程，詳細討論了fdtd法計算中時間步長和空間步長的選取原則以及激勵源的類型和設置；推導了mur一階和二階邊界條件在圓柱坐標下的差分格式；給出了在用fdtd法計算天線的遠場輻射特性時必需採用的頻域和時域近場遠場變換技術；最後用fdtd法計算了平面微帶縫隙天線、柱面共形微帶縫隙天線和柱面共形微帶層疊天線的輸入阻抗和遠區輻射場，並分析了天線的一些參數的變化對天線輸入阻抗的影響，得出了一些有用的結論。 -
The focusing properties of gaussian beams through a compound optical system are discussed. based on the matrix optical method, formulae of the beam width at the focal plane and imaging distance of focused gaussian beams through the system are derived
討論高斯光束經復合光學系統的聚焦特性，利用矩陣光學方法，推導出了高斯光束經復合光學系統聚焦后束腰寬度和像距的計算公式。 -
2 - d superresolution direction finding methods at subarray level suited for plane phased arrays are studied. for overcoming the limitations of true array manifold ( tam ) that the expense and cost of the array calibration are high and the calibration realization is complex, five kinds of simplified array manifolds are proposed, namely direct simplified array manifold ( dsam ), simplified array manifold based on ideal subarray patterns ( sam _ isp ), simplified array manifold based on approximate ideal subarray patterns ( sam _ aisp ), simplified array manifold based on gaussian subarray patterns ( sam _ gsp ), simplified array manifold based on approximate gaussian subarray patterns ( sam _ agsp ) respectively. the performances of applying these array manifolds to music, wsf and ml methods at subarray level are analyzed
本文研究了平面相控陣二維子陣級超分辨測向，針對真實陣列流形（ tam ）校正成本和代價高以及實現復雜的缺陷，提出了五種簡化的陣列流形分別為直接簡化的陣列流形（ dsam ） 、基於理想子陣方向圖的簡化陣列流形（ sam _ isp ） 、基於近似理想子陣方向圖的簡化陣列流形（ sam _ aisp ） 、基於高斯子陣方向圖的簡化陣列流形（ sam _ gsp ）和基於近似高斯子陣方向圖的簡化陣列流形（ sam _ agsp ） 。 -
The results of the axial and transversal intensity distributions of gaussian beams and 0 - order bessel - gaussian beams show that the results by the optimized laguerre - gaussian truncated series are in good agreement with those by the fresnel diffraction integral method if the integration plane is not close to the aperture
對高斯光束和零階貝塞爾高斯光束的軸向和橫向光強分佈的計算結果表明：當積分面不是很靠近光闌時，用參數最佳化選取的拉蓋爾高斯截斷級數法與用直接數值積分所得結果符合很好。
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