近似方程 的英文怎麼說

中文拼音 [jìnsìfāngchéng]
近似方程 英文
approximate equation
  • 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...
  • 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
  • 程 : 名詞1 （規章; 法式） rule; regulation 2 （進度; 程序） order; procedure 3 （路途; 一段路） journe...
  • 近似 : approximate; similar; approach; approximation; roughness; propinquity
  1. Optimized association rules are permitted to contain uninstantiated attributes. the optimization procedure is to determine the instantiations such that some measures of the roles are maximized. this paper tries to maximize interest to find more interesting rules. on the other hand, the approach permits the optimized association rule to contain uninstantiated numeric attributes in both the antecedence and the consequence. a naive algorithm of finding such optimized rules can be got by a straightforward extension of the algorithm for only one numeric attribute. unfortunately, that results in a poor performance. a heuristic algorithm that finds the approximate optimal rules is proposed to improve the performance. the experiments with the synthetic data sets show the advantages of interest over confidence on finding interesting rules with two attributes. the experiments with real data set show the approximate linear scalability and good accuracy of the algorithm

    優化關聯規則允許在規則中包含未初始化的屬性.優化過程就是確定對這些屬性進行初始化，使得某些度量最大化.最大化興趣度因子用來發現更加有趣的規則;另一方面，允許優化規則在前提和結果中各包含一個未初始化的數值屬性.對那些處理一個數值屬性的演算法進行直接的擴展，可以得到一個發現這種優化規則的簡單演算法.然而這種方法的性能很差，因此，為了改善性能，提出一種啟發式方法，它發現的是近似最優的規則.在人造數據集上的實驗結果表明，當優化規則包含兩個數值屬性時，優化興趣度因子得到的規則比優化可信度得到的規則更有趣.在真實數據集上的實驗結果表明，該演算法具有近似線性的可擴展性和較好的精度
  2. The jellium model in a certain approximation leads to the equation.

    凝膠模型在某種近似下導致下列方程。
  3. The likes of netfish iona, documentum, sun, bea, commerce one, fujitsu, kildara, and bowstreet got together with their ebxml prototypes written in perl, python, c, or java and demonstrated their ability to send messages transparently to each other s software, including demonstrations of intermediary systems

    包括與實體有關的建模和統一建模過程（ unified modeling process ）在內的用於應用程序開發的所有公共方法所期望的是實現，而不是退回到構成近似於實現的問題空間的基本概念。
  4. The importance of the steady state approximation is that it greatly simplifies the solution of the rate equations in complex consecutive reaction pathways.

    穩態近似法的重要性是，它大大簡化了在復雜的連串反應途徑中速度方程的求解。
  5. In the thesis, the fundamental formula of ffd method derives from the square root that is approximated by a continued fraction expansion in the one - way wave equation. optimizations of the parameters of the finite - difference operator improve the validity of the method

    本論文用連分式近似單程波波動方程中的平方根導出ffd演算法的基本公式，並對ffd演算法中的有限差分運算元進行了系數優化，進一步提高了計算的有效性。
  6. Especially, the second part of the computing the backscattered field is given. 5

    在利用kirchhoff遠場近似方程計算後向散射系數時，給出了計算該公式第二部分的方法。
  7. In the last part of the paper, we derive the euclidean equation of motion of the magnetic vector in a theoretical magnetic film consisting of biaxial - anisotropic molecular ferromagnets, which is reduced to the 2 + 1 dimensional sine - gordon field equation in the strong anisotropy limit. we obtain various domain structures which are the static solutions of the sine - gordon field equation

    最後考慮由雙軸各向異性分子磁體形成的理想無界膜，在強各向異性極限下，採用半經典近似方法，將磁化矢量的時空運動方程約化為2 + 1維sine - gordon場方程，從而得到各類疇結構。
  8. And beginning with a perturbed nls equation, using a multi - scales perturbation expansion, we get the zero order and the first order equations, discuss the eigenstates of the operator in the equations, induct relevant " derivative states ", form the completeness of the bounded eigenstates of the associated operator in li space, and expand the corresponding parameters in the closure, get a series evolution equations of the coefficients in the expanded formulas, find the first order approximate solution by researching the evolution equations. this paper also gives the basis of this method - the completeness we have formed and the singular perturbation technique

    ） dinser方程的求解問題，討論了自伴運算元的本徵函數的正交性和完備性，介紹了尋求微分方程的近似解常用的攝動方法，並從帶有某種擾動項的nls方程出發，利用多重尺度的攝動方法得到了方程的零級近似方程和一級近似方程，通過對近似方程中運算元的特徵態的討論，引入適當的「導出態」 ，建立了運算元在l _ 2空間的特徵態的完備性。
  9. Since using forth - order approximations, they save computer storage and are convenient to implement

    由於採用四階近似方程，在保證計算精度的前提下，該方法具有節省計算工作量和易於實現的特點。
  10. The main achievement of the paper is that the nnlse is simplified to a linear equation. it is found that we can controll a weak beam ' s phase to experience a very large phase shift within a rather short propagation distance by modulating the input power of a stronger soliton beam

    本論文的主要貢獻是：把光束的傳輸方程nnlse簡化成一線性形式的近似方程，發現可以通過調節強孤子光束的功率來控制另一弱光的相位並能使之在極短的傳輸距離內產生大的相移。
  11. The relaxation oscillation in solid - state laser with relaxation oscillation pumping is studied theoretically by the rate equation. the undulation of the laser photon density contains relaxation oscillation frequency itself and that of pumping. when those two frequencies are close, the oscillation will be resonated

    我們用速率方程小信號近似方法對泵浦帶有弛豫振蕩的固體激光器的弛豫振蕩的特性進行了系統的理論研究，發現實際光子數的起伏同時具有自身固有的弛豫振蕩頻率和泵浦光的弛豫振蕩頻率兩種分量。
  12. ( 2 ) the symplectic integrator method is applied to the high frequency asymptotic evolution of the wave equation based on maslov symplectic geometrical theory

    （ 2 ）將辛演算法運用到基於masiov ?辛幾何理論的求解波動方程的高頻近似方法中。
  13. That is, we string theorists have some approximate equations for strings, but we do not know the exact equations

    換句話說，弦論學家只得到了一些弦的近似方程式，而仍不知道精確的方程式。
  14. Numerical results show that the designs in the examples of turbine engine frame foundation is very good

    作者結合汽輪機框架式基礎實例把該近似方法應用於結構的動力優化過程，取得了滿意結果。
  15. 2. the approximate method of simplifying two - dimension wave equations in slowly varying nonhomogeneous medium is constructed

    （二）構造了利用小波變換簡化二維非均勻緩變介質中波動方程的近似方法。
  16. Based on the nonlinear paraxial equation and b - t theory, a differential equation, which describes the small - scale self - focusing in gain ( loss ) media has been derived. the change rule of the maximal gain frequency, cutoff frequency and integral exponential gain have been analyzed approximately

    我們首先從非線性近軸波方程出發，基於b - t理論的思想，在考慮了介質的增益（損耗）特性的情況下，推導得出了小尺度自聚焦所滿足的微分方程，並通過近似方法分析了最大增長頻率、截止空間頻率及積分指數增益等的變化規律。
  17. With the solutions of characteristic equations, we advanced an approximative algorithm for solving precise characteristic equations

    進一步運用? 1時的特徵方程的解，提出了一種求解嚴格特徵方程之特徵值的近似方法。
  18. The equilibrium condition for the cylindrical configuration in fluid membrane is re - examined in this paper, using the direct and the indirect variational method and taking account of possible influences of its topology

    本文還研究了柱狀膜的靜力學方程。由於開口的柱狀膜的不穩定性，對柱狀膜的研究只能採取近似方法。
  19. The quasi - wavelet numerical solutions of approximate equations for long waves in shallow water

    淺水長波近似方程組的擬小波解
  20. ( 3 ) we successfully derived some exact solitary wave solutions of the nonlinear approximate equations with long waves in shallow water by using the hyperbola function method

    （ 3 ）用雙曲函數法，成功得到了非線性淺水長波近似方程組的精確孤立波解。
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