green theorem 中文意思是什麼
green theorem
解釋
格林公式-
In the second part, firstly, the mathematical model for predicting hydrodynamic characteristics of varivec propeller under steady or unsteady condition are present, based on the general propeller lifting - surface theory, potential flow theory and green theorem. then, theoretical calculation methods for predicting hydrodynamic characteristics of varivec propeller designed above paragraphs are present, based on the finite basic solution method, the unsteady vortex lattice method and hess - smith method
在理論計算部分，本文首先基於常規螺旋槳升力面理論、勢流理論和格林定理建立了定常和非定常狀態下全方向推進器水動力性能計算的數學模型，然後利用有限基本解法、非定常渦格法和赫斯?史密斯方法對全方向推進器定常和非定常狀態下的數學模型進行了數值離散，接下來針對前面所設計的全方位推進器進行了數值預報。 -
In this article, several existing main compensation methods for the term of dynamic stiffening are reviewed ; describing method of material coordinate is introduced on the basis of the principle theorem of mechanics of continuum ; and the dynamic equation of flexible body is derived from nonlinear green strain tensor and kichhoff stress tensor, which are based on initial configuration
本文評述了現有的幾種主要的動力剛化項補償方法，根據連續介質力學的基本原理，引入物質坐標的描述方法，採用基於初始位形的非線性green應變張量和kichhoff應力張量推導柔性體的動力學方程。 -
Green " s theorem is employed to find the quantity relationship among the constraints of heating rate, dynamic pressure and lift in reentry flight. the paper deduced the approximate solution of the optimal aeroassisted coplanar trajectories under the three typical constraints. the performance index to be minimized are either heat input, the total dynamic pressure, time during the atmospheric flight, the time integral of the square of the path inclination ; or maximize the time of flight during the atmospheric portion of the trajetory. an important conclusion is firstly obtained : under the three constraints above, the optimal aeroassisted coplanar transfers with the first forth kinds payoffs have the same optimal control laws
採用格林函數法，給出了同一平面氣動力輔助變軌飛行的3種過程約束（氣動加熱率、動壓、升力約束）條件之間關系的近似定量描述形成的飛行包絡線.由此求解了航天器同時受3種約束條件時，各種性能指標下的同一平面氣動力輔助變軌軌跡的近似解及相應的最優控制規律.文中對近似解與控制規律的內部結構作了細致的分析，得到了一些有益的結論 -
Chaper 4, we put forward the concept of the near - field speckles and study their properties by the numerical solution of the integral equation based on the green ' s theorem. we study the near - field speckles produced the by random self - affine fractal surfaces of dielectric medium. the speckle intensities evolve considerably in the near - field region and the local fluctuations in them disappear in the distance of a wavelength
在第四章中，我們提出了近場散斑的概念，並依據介質界面電磁波的格林積分摘要方程對自仿射分形隨機表面產生的散斑光場進行了數值計算模擬研究，發現近場散斑分形特徵與自仿射分形隨機表面的特性有關，且這種分形特徵在非近場區域消失。
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