有限方差 的英文怎麼說

中文拼音 [yǒuxiànfāngchā]
有限方差 英文
finite variance
  • 有 : 有副詞[書面語] （表示整數之外再加零數）: 30 有 5 thirty-five; 10 有 5年 fifteen years
  • 限 : Ⅰ名詞（指定的范圍; 限度） limit; bounds Ⅱ動詞（指定范圍, 不許超過） set a limit; limit; restrict
  • 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
  • 差 : 差Ⅰ名詞1 （不相同; 不相合） difference; dissimilarity 2 （差錯） mistake 3 [數學] （差數） differ...
  • 有限 : limited; restricted; finite; a little; not much
  • 方差 : dispersion
  1. Error estimates of characteristic finite element method for nonlinear advection - diffusion equation

    非線性對流擴散方程特徵有限元法的誤差估計
  2. Second, go deep into investigate the frame and calculate method of real options, apply formulation of gesk, black - scholes carr and margrabe to a instance, and compare the results of different formulations. make use of binominal lattice ^ finite difference and monte carlo to one instance. this paper suggests that the operable procedure and method copeland and antikarov provided with monte carlo simulation and binominal lattice is a best way

    第二，深入分析實物期權應用框架和計算方法，利用gesk公式、 black - scholes公式、 carr公式和margrabe公式對具體的實例進行了計算比較，又採用二項網格法、有限差分方法和蒙特卡羅方法對實例進行了模擬計算。
  3. The scielltific computational theories and methods on bird strike to the windshield of aircraft have been systematically studied and summed up in this thesis, such as fem comptltational principles and procedures to elastic dynamic problems under the conditions of small and non - linear finite deformation, 3d viscous elastic constitutive theory and incremelltal expression under the consideration of the rate effect of non - metallic materials like the aircraft windshield, and the numerical compatational principles and key constitutions for impact - contact dynamic subjects

    2 、系統學習並歸納總結了鳥體撞擊風擋結構問題中的科學計算理論與計算方法。按照鳥撞問題數值計算方法逐步深入的思路，系統總結了小變形結構動力學有限元數值計算方法、有限變形的幾何非線性有限元數值計算方法、粘彈性體非線性形變的本構物理關系；對于實施復雜結構有限元動力學計算的載荷增量方法提出了對newmark差分的改進以及進行材料與幾何非線性數值計算的細致步驟。
  4. Its biquadratic finite element approximation is considered and under the appropriately graded meshes, quasi - optimal order error estimates in the - weighted h ^ 1 - norm, up to a logarithmic factor in the singular perturbation parameter, are proved

    然後，考慮此方程在分層網格剖分上的雙二次有限元逼近，在-加權h ^ 1 -模意義下得到了至多相差一個關于攝動參數對數因子的擬最優階收斂的誤差估計。
  5. The gravity analysis is carried out especially for the synthetic fused silica and calcium fluoride used in 193nm lithographic objective as well as the optical elements with structural sizes of ( 200mm ~ ( 300mm. large numbers of analysis data for surface shape error are obtained by using algor finite element analysis software. then these data are plotted into curves and comparison analysis will be carried out, finally the measures and schemes for reducing gravity deformation are proposed

    因此，本論文重點對大口徑光學系統在高精度光學鏡頭裝校中，因重力變形進行了詳細的分析研究，特別針對193nm光刻物鏡系統所使用的材料sytheticfusedsilica和caleiumfluoride以及用到的結構尺寸200mm ~ 300mm光學零件進行了重力變形分析，使用algor有限元分析軟體獲得了大量的面形誤差分析數據，然後將這些數據繪成曲線進行對比分析，最後提出了減小重力變形的措施與方案，並進行了實驗，驗證了分析結果是正確的，減小重力變形的方法是有效的。
  6. Then the finite element equations are derived with the effective heat capacity method. common time - stepping method and precise time integration ( pti ) method are used to solve the equation

    然後基於等效熱容法推導了伴有相變過程的傳熱控制方程的有限元列式，並且分別研究了用常規的時間差分法和精細積分法求解上述有限元方程。
  7. The integral equations governing the three - dimensional viscous flow inside the turbo - machinery in the rotating coordinate system are presented in this paper, the viscous effects are simulated by the distributed body force described by professor denton j. d. the time - marching method and explicit finite volume difference scheme are employed to solve the flow inside the turbo - machinery

    本文給出了相對旋轉坐標系下葉輪機械內部三維粘性流動的守恆型積分型方程組，利用dentonj . d .教授的粘性體積力法來模擬粘性對葉輪機械內部流動的影響，採用時間推進法和有限體積差分格式對葉輪機械內部的流動進行求解。
  8. Finite differential approach to do schr dinger equation

    用有限差分法解薛定諤方程
  9. A highly efficient numerical algorithm by using multi - grid method ( mgm ) is introduced to solve the three dimensional field distribution in the present paper. formulae of the restriction and prolongation in mgm computation is deduced, and a 3d program of mgm is accomplished, which can solve the field distributions in electron optical systems for various electrostatic lenses. the 3d field distribution in an electrostatic concentric spherical model is tested with mgm algorithm and an algorithm based on finite difference method ( fdm ) respectively. comparing these two results in view of computational efficiency and computational accuracy, it appears that mgm is superior to fdm in solving electrostatic field distribution for the electron optics problem. this paper shows that the 3d field computation using mgm greatly improves the computational efficiency of field distributions in electron optical systems and shortens the computational time

    本文將一種高效率的數值計算方法? ?多重網格法引入三維靜電場分佈的計算，多重網格法利用限制和延拓可迅速求得滿足精度要求的場分佈.研究了求解各種靜電透鏡電子光學系統三維場分佈的多重網格法程序，驗算了靜電同心球模型的三維場分佈.通過與目前在場計算中常用的有限差分法進行比較，可以看出多重網格法的計算效率和計算精度優于有限差分法.本文表明利用多重網格法計算三維場大大提高了場分佈的計算效率，縮短了計算時間，因此為后續計算打下了良好的基礎
  10. In this thesis, a new finite difference time domain ( fdtd ) method is developed to treat a two - dimensional photonic crystal consisting of nearly - free - electron metals. the method is used to calculate the band structures and investigate defect modes and guide modes in such a photonic crystal

    本論文首先發展了一種基於等離子模型的有限差分計算方法，並應用於二維金屬光子晶體，有效地計算了該類光子晶體的能帶結構。
  11. Finite element method ( fem ) is an approximate solution in engineering, there exists some error in the analysis result, so it is important to check the result and to geta right view of the result in the analyzing process, then this can lead the right analysis in the next step

    摘要有限元法是一種工程近似求解的方法，存在誤差，所以在用有限元軟體進行工程分析計算時，很重要的一點是分析過程中必須審視分析的結果，對結果有正確的認識，從而指導工程分析的正確進行。
  12. A method of transforming the fem stress analysis results into photo - elastic isochromatic fringe pattern is discussed. and the fem analysis results of the tooth, which is a key part of mmd1250 mineral sizer, is successfully processed by this method

    探討了把有限元應力分析結果直接處理成光彈性等差條紋圖的方法，並對mmd1250雙齒輥破碎機輥齒的有限元分析結果進行了處理。
  13. In addition, many other problems also exist in hardware neural network, including error problem, learning mode, parallel architecture, and also neural network inner linking problem, hidden layer and the realization of the multiplicator and etc. for instance, error problem : hardware neural network employs the limited precision, and will inevitably bring limited precision error

    另外，硬體實現神經網路還存在誤差問題，學習方式，并行結構等方面的問題，還有神經網路內部的連接問題，隱層及乘法器的實現等等。如誤差問題，硬體實現神經網路使用的是有限精度，不可避免的會產生有限精度誤差，選取合適的精度，才能既適合空間的要求，又避免對網路的實現產生一定的影響。
  14. In this paper, the crank - nicolson type finite difference method is applied to the benjamin - bona - mahony equation. we obtain the existence and uniqueness of the numerical solutions

    在這篇文章中，使用crank - nicolson有限差分方法來離散benjamin - bona - mahony方程，得到其數值解的存在性和唯一性。
  15. And this at any time the square number of a variety is the line combination that is the limited item news number ’ s square

    並且這個隨時間變化的方差是過去有限項噪聲值平方的線性組合。
  16. From this basic thought we can see, because of the square number of now time news voice is the limited item square number to returned to return in the past, it ’ s means that the motion of the news voice have the certain memory, therefore, if in past every moment the square number of the news voice differed to become big, so the square number of the news voice differed to usually also come after it to

    從這個基本思想中可以看出，由於現在時刻噪聲的方差是過去有限項噪聲值平方的回歸，也就是說噪聲的波動具有一定的記憶性，因此，如果在以前時刻噪聲的方差變大，那麼在此刻噪聲的方差往往也跟著變大;如果在以前時刻噪聲的方差變小，那麼在此刻噪聲的方差往往也跟著變小。
  17. By the check - out, inspection and measurement to start construction the industrial art to this test pile with the examination between stake body mass and bearing power, made sure the stroke reasonable operation method drilling under the dissolved cavern geology term ; the pier foundation loading test expressed the lading and rub the lading that resistance drag a glazing for of relation, and to the borehole cast - in - place concrete pile in the karst terrain deliver with break the mechanism, the characteristic of bearing power, proceeding the spot test job of the full of result ; the test data expresses the stake side friction resistance to rises with a bat batch terminal friction resistance very important function, the of tip of pile resistance drag occupies the proportion very few

    通過對本次試樁施工工藝的檢測和樁身質量及承載力的檢驗，確定了沖擊鉆在溶洞地質條件下的合理使用方法；基樁承載實驗表明了荷載與摩擦阻力之間的關系，並對巖溶地區的嵌巖灌注樁的荷載傳遞和破壞機理、承載力特性，進行了富有成果的現場測試工作；試驗數據表明樁側摩阻和支盤端阻起很重要的作用，樁端阻力所佔比例甚少。這與設計樁基時的計算模式相差很大，承載力也較設計增加；使用力學數值分析方法和有限單元法，對鉆孔灌注樁樁端下的巖體強度和結構穩定性方面進行模擬計算和定量研究。
  18. The spectrum evolution of the femtosecond laser pulse in a three - level organic molecular medium ( 4, 4 ' - bis ( dimethylamino ) stilbene ) is studied theoretically by solving the maxwell - bloch equations using an iterative predictor - corrector finite - difference time - domain method

    摘要通過採用預估校正的時域有限差分法求解麥克斯韋布洛赫方程，我們研究了飛秒激光脈沖在三能級有機分子（ 4 ， 4 ' -二甲氨基二苯乙烯分子）介質中傳播時脈沖的頻譜演化情況。
  19. The subregion with pure dielectric layers is analyzed by mol and the fast fourier transform ( fft ) is introduced to reduce the computing time, while the subregion with conductors is analyzed by fdfd to take advantage fully the superiorities of these two methods

    通過在純介質區域使用直線法，導體所在區域使用有限差分法分別進行求解，充分發揮兩種方法各自的優越性。由於在純介質區域中使用了直線法求解，因此該演算法具有計算時間與介質層厚度無關的突出優越性。
  20. We investigate the decision - making problem with a finite set of alternatives, in which the decision information takes the form of a fuzzy preference relation. we develop a simple and practical approach to obtaining the priority vector of a fuzzy preference relation. the prominent characteristic of the developed approach is that the priority vector can generally be obtained by a simple formula, which is derived from a quadratic programming model. we utilize the consistency ratio to check the consistency of fuzzy preference relation. if the fuzzy preference relation is of unacceptable consistency, then we can return it to the decision maker to reconsider structuring a new fuzzy preference relation until the fuzzy preference relation with acceptable consistency is obtained. we finally illustrate the priority approach by two numerical examples. the numerical results show that the developed approach is straightforward, effective, and can easily be performed on a computer

    研究了決策信息以模糊偏好關系給出的有限方案決策問題，提出了一種簡潔且實用的模糊偏好關系排序方法.該方法首先建立一個二次規劃模型，然後基於該模型推導出求解模糊偏好關系排序向量的一個簡潔公式.基於獲得的排序向量，利用一致性比例對模糊偏好關系進行一致性檢驗.對於一致性較差的模糊偏好關系，則需反饋給決策者重新進行判斷，直至得到一個一致性可接受的模糊偏好關系為止.最後，利用2個算例對該方法進行分析和說明，數值結果表明該方法簡潔、有效，且易於在計算機上操作
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