best approximation 中文意思是什麼

best approximation 解釋
最佳逼近
  • best : adj 〈good 和 well 的最高級〉 （opp worst） 1 最好的。2 最合適的。3 最多的，大部分的。4 〈口語〉...
  • approximation : n. 1. 接近；近似。2. 【數學】近似值。3. 概算，略計。
  1. When asked this, it ' s best to answer with a salary range or approximation and not an exact figure

    回答這個問題時，最好說出一個大致范圍，而不是一個確切的數字。
  2. 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。
  3. The author ' s work gives new way, which is beneficial to real time interaction and can efficiently reduce computing time as well as data storage amount. these algorithms can find good use in numerical machining, robotics, form - position tolerance and computer graphics. ( 3 ) degree reduction for nurbs curves and surfaces by applying the theory of the best uniform approximation of chebyshev polynomials and the explicit matrix representation of nurbs curves, this thesis centers on the research of the explicit nearly best approximation of multi - degree reduction of nurbs curves

    以上關于等距曲線的幾何逼近與代數逼近的演算法改革了當前國際圖形界只能對基曲線沿法矢方向平移定距離的點作近似逼近的固定模式，創造了利於交互操作，能有效地減少計算量及數據存儲量的新方法，可在數控加工、浙江大學碩士學位論文機器人、形位公差學、計算機圖形學中獲得很好的應用（ 3 ） nurbs曲線曲面降階應用nurbs曲線的顯式矩陣表示及chebyshev多項式逼近理論，以實現nurbs曲線顯式一次性降多階的近似最佳逼近為目標進行了研究
  4. Strong unicity of best simultaneous approximation

    最佳同時逼近的強唯一性
  5. The obtained results in the paper are as follows : ( 1 ) the expansion of fourier series of orthogonal trigonometric polynomial for conditional mathematical expectation and function of random variable ; ( 2 ) the best approximation of trigonometric polynomial about another random variable for function of a random variable ; ( 3 ) the best approximation order of trigonometric polynomial for function of random variable

    摘要獲得了如下結果： （ 1 ）條件數學期望及隨機變量函數的三角多項式級數表達； （ 2 ）一個隨機變量關于另一個隨機變量的三角多項式的最佳逼近； （ 3 ）隨機變量函數被隨機變量三角多項式最佳逼近的階。
  6. Using calculation result from prophase sample, sampling size needed in next step can been determined and it can be expected that ultimate sample size would be a best approximation for that desired and meet the precision demanded at less cost than traditional methods

    利用前期抽取樣本的計算結果，可以規定進一步需抽取的樣本量，最終樣本量是對真正期望樣本量的一個最佳近似，它比傳統方法更能保證以最少的費用滿足預先設定的精度要求。
  7. In the theoretical simulation on the behavior of single helium atom in aluminum, the varieties of energy data including the formation, migration, binding, and dissociation energies for single helium atom at the interstitial, vacancy, grain boundary, and dislocation sites in aluminum lattice were calculated, based on the density functional theories, general gradient approximation and pseudopotential plane wave method. results showed that the most fittable sites for containing helium atoms inside the cell are vacancies. but in the view of the whole lattice, grain boundaries are the best

    計算結果表明，晶內he原子擇優佔位區是空位，而在整個晶體范圍，最有利於容納he原子的區域是晶界，位錯容納he原子的能力次於晶界和空位；在fcc -鋁的間隙位中， he原子優先充填四面體間隙位；晶內間隙he原子是可動的，通過間隙he原子的運動，可在晶內聚集，或被空位、晶界、位錯等缺陷束縛。
  8. Best polynomial approximation

    最佳多項式逼近
  9. By analysing the compute result of the quadratic approximation formula, we educe the conclusion that 3 is the best rank code for the quadratic approximation formula

    通過對最小二乘擬合公式實際計算結果的分析，得出了「擬合公式階數取3為最佳」的結論。
  10. Basic finance theory says that investors can get the best balance of risk and reward by owning pieces of as many of the world ' s asset classes as they can, from stocks to gold, alpacas to saffron. for years, the s and p 500 - stock index of the biggest u. s. companies was the best approximation of that ideal available to investors and they flocked to it. but in the past decade, the world ' s financial markets have changed in unexpected ways

    對于這些大公司的藍籌股一直勢態低迷的情況，文章從歷史分析入手，通過90年代後期藍籌股的異常牛市來解釋當期一蹶不振的原因：一方面是隨著20世紀末市場化全球化的進程，經濟發展的大爆發，藍籌股指數達到一個過高的頂點，之後很難再超過另一方面是經濟過熱之後的適當緊縮，以及911等事件對美國經濟的打擊，藍籌相對于小企業股票的應變性差的問題。
  11. The expression of best approximation operator on linear manifold in arbitary banach space

    空間中線性流形上的最佳逼近運算元的表達式
  12. Further more, we improve the nearest neighbor approximation method by calculat e mixtures ordered by likelihood of being the best scoring mixture. the likelihood is calculating from previously processed data. this improved method can reduce recognition time by 15. 56 % compared with standard viterbi beam search algorithm

    本文對最近鄰快速估算方法進行改進，在搜索過程中根據已處理過的數據統計出各個高斯混合分量產生最高對數概率的概率，並依此預測隨后的計算中最有可能產生最高對數概率的高斯混合分量，優先計算更有可能產生最高對數概率的高斯混合分量，使標準viterbibeam搜索演算法的搜索速度提高了15 . 56 。
  13. Best fit approximation

    最優近似
  14. The best approximation constant for the bivariate

    型運算元的最佳逼近常數
  15. On the best uniform approximation of a class of triangle summation operators of combination type

    關於一類組合型三角求和運算元的最佳一致逼近
  16. The existence of best approximation for perturbed distance function

    攝動距離函數最佳逼近元的存在性
  17. Coincidence points theorem in best approximation

    重疊點定理在最佳逼近中的應用
  18. Strong - chip and characterization of the best approximation with generalized restrictions

    性質和廣義限制域逼近的特徵
  19. Based on principle of neural network which has the best approximation and learning functions, a multiobjective quasi - neural optimization method is established. the relevent theorems and their proofs are given

    根據具有最佳逼近和學習功能的神經網路原理，建立了多目標擬神經優化方法，給出了有關定理及其證明
  20. Control systems in modern automatic engineering are nonlinear, time - changed and indefinite. lt is difficult to model by traditional method, even sometime impossible. under these circumstances we should apply model identification to gain the approximate model of object for effective control, there are many models to be chosen, fuzzy model is one of them, it is put forward with the development of fuzzy control. fuzzy model has characteristics of general approximation and strong nonlinear, it is fit for describing complex, nonlinear systems. to avoid rules expansion when the number of input values are very big. in this paper we apply hierarchical fuzzy model to resolve this problem, we also illustrate it has general approximation to any nonlinear systems. genetic algorithm is a algorithm to help find the best parameters of process. lt has abilities of global optimizing and implicit parallel, it can be generally used for all applications. in our paper we use fuzzy model as predictive model and apply ga to identify fuzzy model ( including hierarchical fuzzy model ), we made experiments to nonlinear predictive systems and got very good results. the paper contains chapters as below : chapter 1 preface

    現代控制工程中的系統多表現為非線性、時變和不確定性，採用傳統的建模方法比較困難，或者根本無法實現，在這種情況下，要實現有效的控制，必須採用模型辨識的方法來獲取對象的近似模型，並加以控制，目前用於系統辨識的模型種類很多，模糊模型是其中的一種，它隨著模糊控制的發展而被人提出，模糊模型具有萬能逼近和強非線性的特點，比較適合於描述復雜非線性系統，為了解決模糊模型在輸入變量較多時規則數膨脹的問題，文中引入遞階型模糊模型，並引證這種結構的通用逼近特性。遺傳演算法是模擬自然界生物進化「優勝劣汰」原理的一種參數尋優演算法，它具有隱含并行性和全局最優化的能力，並且對尋優對象的要求比較低，在工程應用和科學研究中，得到了廣泛的應用，本文將遺傳演算法引入模糊模型的辨識，取得了很好的效果。
分享友人
分享到 Line

分享到臉書