differential approximation 中文意思是什麼

differential approximation 解釋
微分逼近
  • differential : adj 1 差別的，區別的；特定的。2 【數學】微分的。3 【物、機】差動的，差速的，差示的。n 1 （鐵路不...
  • approximation : n. 1. 接近；近似。2. 【數學】近似值。3. 概算，略計。
  1. The approximation of the parabolic integro - differential equations is studied with anisotropic biquadratic finite element

    摘要研究具有各向異性特徵的雙二次元對拋物積分微分方程進行了逼近。
  2. Collisonal quantum interference ( cqi ) was observed in the intramolecular rotational energy transfer in the experiment of the static cell, and the integral interference angles were measured. to observe more precise information, the experiment in the molecular beam should be taken, from which the differential interference angle can be obtained precisely. in this paper, the theoretical model of cqi is described in an atom - diatom system in the condition of the molecular beam, based on the first - born approximation of time dependent perturbation theory, taking into accounts the anisotropic lennard - jones interaction potentials. the method of observing and measuring correctly the differential interference angle is presented. the changing tendencies of the differential interference angle with the impact parameter, velocity, and et al. are discussed

    分子內部轉動傳能的靜態池實驗觀察到了碰撞量子干涉效應（ cqi ） ，並且測得積分干涉角，為了獲得更加精確的分子內部轉動傳能的碰撞量子干涉效應信息，實驗就必須要採用分子束實驗進行.本文理論上採用各項異性相互作用勢，應用含時微擾理論的一級波恩近似，假想在分子束實驗的條件下，建立在原子-雙原子分子體系中碰撞量子干涉的理論模型.理論上推導出微分干涉角具體表達式，通過計算定性地討論了微分干涉角隨著碰撞參數、速率等的變化趨勢，同時初步探討了實驗的正確觀測途徑，得出了採用分子束進行實驗觀測的實驗方法，為進一步進行分子束實驗提供了理論基礎，對實驗的進行起到了一定的借鑒作用
  3. Differential equation approximation of fatigue crack growth curve

    疲勞裂紋擴展曲線的微分方程擬合法
  4. In the third part, for a class of parabolic integro - differential equations we obtained ultra - approximation between u and its ritz - volterra projection which leads to a ultraconvergence alternating theorem

    最後，我們對一類拋物型積分-微分方程獲得了真解與ritz - volterra投影之間的強超逼近估計，並在此基礎上得到了一個強超收斂二擇一定理。
  5. Numerical approximation of hopf bifurcation for delay logistic differential equation

    分支參數值的數值逼近
  6. Numerical approximation of interface problems for elliptic differential equations

    橢圓型方程內邊界問題的數值逼近
  7. It is discussed that the numerical approximation of interface problems for elliptic partial differential equations

    討論了橢圓型偏微分方程內邊界問題的數值逼近。
  8. Firstly, in the reproducing kernel space, the spline function is discussed and its equivalent relations are gived ; we prove that the 2 - th differential operator interpolation spline function in the space can be expressed not only by the reproducing kernels but also by polygonal functions. so it is easy to prove its best approximation properties in theory and is convenient for numerical calculation in applications, too

    首先，在再生核空間中討論樣條函數，給出其等價性條件；證明了空間中的一個二階微分運算元插值樣條既可由再生核函數表示又可由折線函數表示，這不僅在理論上便於獲得此種插值樣條函數的最佳逼近性質，而且在應用上也便於數值計算。
  9. For the nonlinear two - point boundary value problem with both time - delay terms and time - advanced terms driven by the optimal control theory, we build a sequence of nonhomogeneous linear two - point boundary value problems according to the successive approximation approach of constant differential equation

    再利用常微分方程的逐次逼近法，將由系統的最優控制問題得到的即含有時滯項又含有超前項的非線性兩點邊值問題化為非齊次線性兩點邊值問題族。
  10. In this paper, we use the coupled fixed point theorem for mixed monotone condensing operators to obtain an existence, uniqueness and iterative approximation theorem of solutions of initial value problems for second order mixed monotone type of impulsive differential equations

    利用混合單調凝聚運算元的耦合不動點定理，給出了二階混合單調型脈沖微分方程的初值問題的解的存在唯一性及迭代逼近定理
  11. This work gives amsotropy surfaces of three collision systems he - hf, he - hcl, he - hbr. comparing theoretical results with experimental ones has carried out the discussion on feasibility of adapted potential model. all differential cross sections ( dcs ), partial wave cross sections ( pcs ) and total scattering cross sections ( tcs ) have been achieved by using close - coupling approximation method to calculate the three systems, and results above have also been discussed and analyzed

    首先，具體介紹了理論計算方法? ?密耦近似方法，接著討論了各種勢能模型的優缺點，利用孫桂華改進的勢能模型? ? ms勢，分別給出了he - hf 、 he - hcl 、 he - hbr三個碰撞體系的各向異性勢能面，並結合計算結果與實驗結果的比較，對所採用的勢能模型的可行性展開了討論；用密耦近似方法對he - hf 、 he - hcl和he - hbr三個碰撞體系進行計算，得出了各種微分散射截面、分波截面和總散射截面，並將計算結果進行討論和分析。
  12. The differential probability and linear probability is defined and the approximation expression to compute the maximum differential and linear probability of while spn ' s from the single round ' s differential and linear probability is presented

    對于目前最常用的差分分析和線性分析方法我們首先給出了差分概率和線性概率的定義，同時也給出了由單輪的差分概率和線性概率計算整個spn網路的最大差分概率和線性概率的近似表達式。
  13. The main research work involves : ( 1 ) based on first order ode ( ordinary differential equation ) approximation theory and hopf bifurcation theory, the nonlinear motion stability of the train is studied emphatically

    本文所做的主要工作有： （ 1 ）基於常微分方程的一次近似理論和hopf分叉理論，重點研究了列車（車輛）系統的非線性運動穩定性。
  14. We presented the theoretical model of collisional quantum interference on rotational energy transfer in atom - diatom system, using the theories of time dependent born approximation and quantum inelastic scattering, and taking into account the long - range interaction potentials. the key factors in the determination of the differential and integral interference angles are obtained. co a1 ( v = 0 ) ~ e3 - ( v = l ) system in collision with he is calculated, the calculated values are consistent with the experimental results, but for the partners being ne and ar, the calculated values are not so good

    首次得到了從理論中計算干涉相位角的方法，得出了干涉相位角和實驗條件中各相關量的關系，並計算了coa ~ 1 （ v = 0 ） e ~ 3 ~ - （ v = 1 ）和he碰撞誘導轉動能量傳遞過程中量子干涉效應的實驗，計算結果和實驗符合的很好，但是對于碰撞伴是ne和ar的實驗，計算結果不是很好，原因是隨著碰撞伴質量和極化率的增大，相互作用勢更強，應該考慮短程相互作用勢的貢獻。
  15. It gives a new expression method for the solution of often coefficient linear siuu1taneous differential equation, with the aid of uneven sublinear system of equations ' s standard base solution matrix nature, gradually approximation, derivative principle, the text give the limited form of this system of equations solution and the developments for the contents of literature

    摘要提出了常系數線性微分方程組解的新的表達方式，藉助齊次方程組的標準基解矩陣的性質、逐步逼迫法、導數法則，給出了這個方程組解的有限形式。
  16. In this thesis, we study ultraconvergence of finite element approximation in one dimensional case ( include two - point boundary value problem, one dimensional parabolic equation and parabolic type integro - differential equation )

    本文研究一維問題（包括兩點邊值問題，一維拋物問題及拋物型積分-微分方程）有限元逼近的強超收斂性。
  17. Unicity differential identity and asymptotic property of quadratic pad 233 ; approximation of the exponential function

    二元二次對角逼近的代數性質
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