symmetric axis 中文意思是什麼
symmetric axis
解釋
對稱軸-
The symmetric values about the imaginary axis of zero - poles which the unstable process lies in the open and closed right - half plane are defined as their mirror - injection
非穩定過程在開右半平面的零極點關于虛軸的對稱值稱為該零極點的鏡像映射。 -
Based on the above theory and methods, the main works of this thesis are lasted as follows : starting from the propagation law of partial coherent light and beam coherence - polarization ( bcp ) matrix approach, the properties of pgsm beams through both an axis - symmetric paraxial optical abcd system and an axis - unsymmetric one are studied. the analytical propagation equations of pgsm beams are derived, which enable us to study the propagation - induced polarization changes and irradiance distributions of pgsm beams through an axis - symmetric paraxial optical abcd system and an axis - unsymmetric one
在此基礎上，本文進行的主要工作有：基於空間-時間域中互強度的傳輸理論和bcp矩陣處理方法，首次研究了pgsm光束通過對稱和非對稱abcd光學系統和光闌的傳輸變換特性，推導出了pgsm光束傳輸表達式，可以對pgsm光束偏振和光強的傳輸變化進行分析。 -
An equal angle section, being a singly - symmetric section, will buckle in a torsional - flexural pattern about any axis except for flexural buckling about the unsymmetric axis
等邊角鋼截面為單軸對稱截面，除繞非對稱軸失穩為彎曲失穩外，繞其他任意軸均為彎扭失穩。 -
( 2 ) the increase of rainfall is closely associated with the increase of the disturbance wind which often can be found before the increase of rainfall, so the increase of the nonlinear subcritical symmetric instability can make the rainfall increase. ( 3 ) heavy precipitation often occurs between the south of axis of upper jet at 200hpa and the north of axis of low jet at 850hpa
（ 3 ）降水區和暴雨中心主要位於200hpa高空急流軸南側和85ohpa低空急流軸北側之間;非線性亞臨界對稱不穩定與高空急流關系密切，它可能觸發高空急流核的形成;它與低空急流關系也很密切，它的出現可能引起低空急流的出現。 -
The details of the construction and characteristics of the new finite - difference scheme are presented in this thesis, by using both the integration theorem and the taylor expansion theory. it is proved that the new approach has the second - order accuracy on the grids with axis - symmetric voronoi cells and at least has the first - order accuracy in general. according to this character of the scheme and the computational requirements of the finite - difference approach, a striping procedure is involved to decompose the velocity model into variable spatial size grids with a nearly constant tune step preserved
本文從積分定理和taylor展開兩個角度，詳細分析了基於voronoicell的非規則網格有限差分演算法的構造過程及性質，並且在理論上證明了本文的差分方法的精度與網格形狀的關系：當voronoicell為關于節點的軸對稱圖形時，本文差分方法具有二階精度；在一般的網格上，則至少具有一階精度。 -
Reducing technique for two dimensional em scattering problem with single axis symmetric structure
用於平面單軸對稱結構電磁波散射的減元技術 -
Abstract : based on the c. carathe " odory theorem, several conclusions related to near - axis image formation in an axial symmetric optical system have been verified by means of the projection transformation
文摘:以卡拉西奧多里定理為基礎，用投影變換驗證了在均勻的各向同性介質中具有軸對稱性的光學系統近軸成象的結論。
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