近似橢圓的 的英文怎麼說

中文拼音 [jìnsìtuǒyuánde]
近似橢圓的 英文
near-elliptical
  • 近 : Ⅰ形容詞1 （空間或時間距離短） near; close 2 （接近） approaching; approximately; close to 3 （親...
  • 橢 : Ⅰ形容詞（卵形） oval-shapedⅡ名詞[書面語] （長圓形的容器） elliptic vessel
  • 的 : 4次方是 The fourth power of 2 is direction
  • 近似 : approximate; similar; approach; approximation; roughness; propinquity
  • 橢圓 : [數學] oval; oval shaped; ellipse; ellipsoid橢圓規 ellipsograph; [圖] elliptic trammel; 橢圓軌道 ...
  1. A new waveguide made of changing a wide wall of a rectangular waveguide to a uniform curved wall is called conformal waveguide. a kind of expression of approximate solution for domain mode of the new waveguide, including symmetric, unsymmetric arc, parabolic arch, hyperbolic arch, elliptic arch, etc., is constructed by using boundary condition of mental waveguide, variational method and boundary element method. by using the equivalence principle, an approximate calculating formula for equivalent resonant conductance of a narrow longitudinal halfwavelength slot cut in the curved wall of the unsymmetric arcrectangular waveguide is derived, and the result is shown. although this solution is approximate, it can solve the problem in designing the slotted antenna of such conformal waveguide

    把矩形波導一個寬面外突成均勻曲面構成的新波導統稱為共形波導.利用金屬波導邊界條件、變分法、邊界元素法構造這種新波導中主模場的一種近似解表達式，包括曲面橫截線為對稱、非對稱圓弧，拋物線弧，雙曲線弧，橢圓弧等.然後根據等效原理，推導非對稱圓弧矩形波導曲面上窄的縱向半波長縫隙的等效諧振電導的近似計算公式，給出計算曲線.這種解雖然是近似的，但卻能解決這類共形波導縫隙天線的工程設計
  2. In the two - body case, the approximate equations of relative motion on elliptic orbits are derived

    在二體假設下，推導了橢圓軌道上相對運動方程的近似形式。
  3. In the models, the time dependent parabolic equations, deduced from the mild slope equations with currents or not, are used as the governing equations. based on the general conditions for open and fixed natural boundaries with an arbitrary reflection coefficient and phase shift, the boundary conditions for the present models are treated. the alternative direction implicit method is used to solve the governing equations and the numerical schemes are unconditional stable

    在建立模型時，將原始的橢圓型緩坡方程的近似型式? ?依賴時間變化的拋物型方程，作為控制方程；從將開邊界條件、不同反射特性的固壁邊界條件相統一的表達式出發，對邊界條件進行處理；用adi法數值求解控制方程，格式無條件穩定；節省了計算機內存和計算量。
  4. For membrane contactor process, the binary gas mixture diffusion through the pore channel should be considered as a transition diffusion of the absorbed momentum a through the stagnant momentum b. and the process would consist three steps : transition diffusion through the pore channel, stephen diffusion in the pore edge, and the pore interaction in the membrane surface

    對于孔形狀為近似橢圓形的聚丙烯微孔膜，在研究擴散問題時，其等效孔徑可採用葉孔擴散問題中的孔形狀校正公式來計算。在膜接觸器中，氣體通過微孔膜的擴散機理為過渡擴散，其擴散過程包括通過孔道主體的過渡擴散、微孔膜出口處孔道邊緣的stephen擴散以及孔之間的相互作用。
  5. We select a common feature in the image - edge of the object as our research content and from this point we spread our work including the contrast enhancing technologies, using mathematical morphology to restrain noises in image, extracting of the geometric primitives, dwt in edge detection and the border thinning and tracing technologies

    我們重點針對圖像物體的最直觀特徵?邊緣進行研究，以此為出發點，研究了包括水下圖像對比度增強，利用同態學進行水下圖像噪聲去除，直線和橢圓基元的提取，利用小波變換進行邊緣提取以及基於多邊形近似原則的邊緣追蹤技術在內的各種演算法。
  6. In chapter three, we consider the finite volume element mstheods for nonlinear hyperbolic problems on the basic of the chapter three, optimal order error estimates in the h1, l2norms and w1, almost optimal error estimates in l are also demonstrated

    在第二章的基礎上也得到了h ~ 1 ， l _ 2和w ~ （ 1 ， ）誤差估計以及l _最優誤差估計和近似解和真解的廣義橢圓投影間的超收斂估計。
  7. In chapter two, we consider the finite volume element methods for nonlinear parabolic problems optimal order error estimates in the h1, l2norms and w1, almost optimal error estimates in l are demonstrated. moreover superconvergence in the error between the approximate solution and the generalized elliptic projection of the exact solution is also shown

    第二章考慮非線性拋物方程的初值問題的體積有限元法，並證明了h ~ 1 ， l _ 2和w ~ （ 1 ， ）誤差估計以及l _最優誤差估計，而且還得到了近似解和真解的廣義橢圓投影間的超收斂估計。
  8. At the same time, as more and more radio sources have been set up, electromagnetic pollution in urban area becomes more serious, which is harmful to people ' s healthy and communication system so it is necessary to simulate the electromagnetic propagation in urban area by computer being an approximate hf method in evaluating em scattering ， the complex ray method （ crm ） is valuable in actual applications ， mainly benefited from its simple physical model ， convenient mathematical formulation and computational efficiency, especially with the scenes of scattering from complex objects based on the condition mentioned above, a hybrid ray model of the urban area electromagnetic wave propagation prediction was established with the foundation of ray tracing theory and complex ray theory

    復射線技術作為一種求解波場問題的高頻近似方法，由於其具有物理模型簡單、數學處理方便、計算效率高等優點，在復雜的目標散射特性分析等應用領域中有著重要的應用價值。基於以上的情況，本文在射線追蹤理論和復射線理論的基礎上，為城區環境建立了混合射線預測模型。本文採用橢圓模型對已有的射線追蹤方法進行加速，並將復射線理論應用到城區環境電波傳播預測中，提出新的預測方法混合射線方法。
  9. Abstract : based on the basic concept of the revolving shell, the equation of the middle surface generatrix of the approximate ellipsoid portion of the ellipsoidal head is derived, the unwrapped area and the unwrapped diameter of the ellipsoidal head are calculated, the result is compared with that of derived from the real ellipsoid and that of calculated from the empirical equation, relative chart and code are given out, which could be used by manufactures for reference

    文摘:根據回轉殼體的基本概念，推導了橢圓封頭的近似橢圓殼部分的中面母線方程，據此推導計算了橢圓封頭的展開面積及展開圓直徑，並根據橢圓殼幾何形狀推導的結果與經驗公式所得結果進行了比較，給出了有關圖表及計算程序，可供製造單位參考使用。
  10. In the dynamic method, starting from the analytical solutions of the cw equations, the flying - around orbit is proved to be an ellipse centered at the reference satellite, and its description parameters are presented, hi the kinetic method, flying - around conditions and equations in kinetic form are obtained by first order approximating, and the description parameters of the relative orbit are given

    動力學方法從cw方程的解析解出發，證明了繞飛軌道是以參考衛星為中心的橢圓，定義了繞飛軌道的描述參數並給出了其表達式。運動學方法通過一階近似，得到了運動學形式的繞飛條件和繞飛方程，給出了繞飛軌道各參數的表達式。
  11. And the newly developed method of lame function method in solving the multi - order approximate equations of nonlinear evolution equations is also discussed. and following equations are solved in this method : nonlinear schr dinger, bbm equation, zakharov equation, kp equation, boussinesq equation and cubic nonlinear schr dinger

    最後介紹在橢圓函數展開法基礎上發展而來的，利用lam函數求解非線性發展方程多級近似解的方法，並且求解了非線性schrdinger方程，非線性bbm方程， zakharov方程， kp方程， boussinesq方程和立方非線性schrdinger方程等方程。
  12. Unknown displacement and electric potential jumps in the integral equations are approximated with a product of fundamental density function and polynomials, in which the fundamental density function reflects singular behavior of electroelastic fields near the crack front and the polynomials can be reduced to a real constant under uniform loading

    超奇異積分方程中的未知位移間斷和電勢間斷近似地表示為基本密度函數與多項式之積，其中基本密度函數反映了橢圓片狀裂紋前沿電彈性場的奇異性，而多項式在均布載荷作用下可用一個常數來表達。
  13. In the first part, this thesis emphasizes to introduce the approximation functions and inducement of three filters. also this thesis introduces the reason of choosing the cauer approximation

    著重介紹了三種濾波器的近似函數以及其推導過程，並介紹了為什麼要選擇橢圓近似。
  14. Error analysis of the approximate ellipse made by four - arcs method

    用四心圓法件近似橢圓的偏差分析
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