數學近似法 的英文怎麼說

中文拼音 [shǔxuéjìnsìfǎ]
數學近似法 英文
mathematic approximation
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 學 : Ⅰ動詞1 （學習） study; learn 2 （模仿） imitate; mimic Ⅱ名詞1 （學問） learning; knowledge 2 （學...
  • 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...
  • 法 : Ⅰ名詞1 （由國家制定或認可的行為規則的總稱） law 2 （方法; 方式） way; method; mode; means 3 （標...
  • 數學 : mathematics
  • 近似 : approximate; similar; approach; approximation; roughness; propinquity
  1. The striking fact about heron's work is his commingling of rigorous mathematics and the approximate procedures and formulas of the egyptians.

    Heron的工作突出之點是他把嚴密的數學同埃及人的近似方法和公式融合在一起。
  2. Abstract : the more detailed mathematial derivation and analysis of watson transformation in diffraction theory of ground wave is made by two different method. in derivation necessary and approximate conditions requred to make the transformation are specially discussed

    文摘:採用兩種不同的方法對地波繞射理論中的瓦特松變換問題做了較詳細地數學推導，並著重討論了做瓦特松變換的要求的必要條件與近似條件。
  3. First, single led is analysed and disposed approximately to build the mathmatical model, light energy of one point on screen is calculated by algebraic addition, then the distribution of light energy on the whole area of screen is deduced

    首先對單個發光二極體進行分析，對其做近似處理，建立數學模型，用代數疊加的方法來推導光幕面內某一點的光能量。
  4. The main results achieved in this thesis can be summarized as follows : 1. by means of the fourier series expansion, an approximate analytical propagation equation of flattened gaussian beams ( fgbs ) passing through an apertured paraxial abcd optical system is derived, and illustrated with numerical examples, when the transmissivity of the aperture is t ( x ) = cos ( x )

    用傅立葉級數展開法研究了平頂高斯光束通過有光闌限制的近軸abcd光學系統的傳輸特性，導出了光闌透射率為t （ x ） = cos （ x ）時的近似解析傳輸公式，硬邊光闌的情況可作為= 0的特例得到。
  5. Hence, in the resent years, the last two models, which can both be ranked in discontinuum models, have been developed and have been increasingly powerful. the advantage of these models is that volume - averaging approximations are avoided at the scale of the fracture network. in cases where an equivalent continuum cannot be defined, discontinuum network simulation is a viable alternative

    后兩種方法屬于非連續介質模型，近年來得到了快速的發展，其作為力求從細節和底層上再現巖體的非均質性的數學手段，似乎更能刻畫裂隙巖體滲流的基本規律，因而具有廣泛的發展空間。
  6. This article describes the development process of surrogate models and introduces some experiment design methods and approximation approaches that can be used for a mdo surrogate model, they are full factorial experiment design, orthogonal experiment design, uniform experiment design, central - composite experiment design, and polynomial response surface method, kriging method, radial basis function method and artificial neural network

    為此本文中分別介紹了正交試驗，均勻試驗以及中心復合試驗等幾種試驗設計方法，以及多項式響應面， kriging ，和徑向基函數等幾種數學近似方法。並且通過構造描述機翼展向升力分佈的代理模型，對上述幾種方法作了對比分析。
  7. Based on many references, a evaluating function is proposed with performance index of hall call waiting time ( hwt ), people number in a car, energy consuming. the statistic approximation algorithm for hwt is introduced, based on the analysis of elevator traffic state, the calculation of traveling distance and stop number is explained in detail in the thesis. according to the characteristics of the elevator, a group of elevator teaching signals are constructed, by which the weight coefficients are trained according to the widrow - hoff rule

    本文在借鑒了大量的文獻基礎上，提出以平均等候時間、轎廂人數、能源消耗為性能指標的評價函數；詳細介紹了乘客待梯時間hwt的統計近似演算法；基於對電梯交通狀況的分析，對停層次數和運行距離這兩個重要參數的計算進行了詳盡的介紹；依據電梯運行特性參數，構造一組電梯運行教師信號，並採用神經網路的widrow - hoff學習規則訓練權系數。
  8. For the purpose of discovering the near - globally optimal solution, this paper proposed a hybrid approach of ant colony algorithm and sequential quadratic programming ( sqp )

    摘要為了獲得整體近似最優解，提出採用蟻群演算法，搜索發電機可運行狀態的最優組合，並對蟻群演算法的數學模型進行分析，以參數的形式給出具有普遍意義的收斂性定理。
  9. Transformed the six - bar guide - bar mechanism realizing linear displacement in automatic instruments into a basic rotating guide - bar mechanism, established the mathematical model of velocity approaching constant by the classical approximate synthesis theory and the modern error theory, discussedthe influences of the existent region of main mechanismic parameters on kinematic and dynamic properties, analysed the theoretical transmission ratio error, advances systematic, complete steps and methods for dimensional synthesis of this mechanism with computer aided design

    將自動化儀表中實現線性輸出的六桿導桿機構轉化為基礎轉動導桿機構，應用經典的機構近似綜合理論與現代的誤差理論，建立了速度逼近常數的數學模型，討論了主要機構參數存在區域及對運動、動力性能的影響，分析了傳動比理論誤差，提出了系統完整的計算機輔助尺度綜合的步驟與方法。
  10. A general synthesis model of mixed - point straight - line linkage in the general condition was established, and some key parameters in the equations were solved

    摘要採用解析法建立了一般情況下混合點近似直線機構綜合的通用數學模型，並給出了方程中關鍵參數的求解方法。
  11. Monte carlo is a method that approximately solves mathematic or physical problems by statistical sampling theory. when comes to bayesian classification, it firstly gets the conditional probability distribution of the unlabelled classes based on the known prior probability. then, it uses some kind of sampler to get the stochastic data that satisfy the distribution as noted just before one by one

    蒙特卡羅是一種採用統計抽樣理論近似求解數學或物理問題的方法，它在用於解決貝葉斯分類時，首先根據已知的先驗概率獲得各個類標號未知類的條件概率分佈，然後利用某種抽樣器，分別得到滿足這些條件分佈的隨機數據，最後統計這些隨機數據，就可以得到各個類標號未知類的后驗概率分佈。
  12. The discrete element method ( dem ) is a powerful tool in analyzing granular assembly. the granular discrete element method can be applied to the partials, whose shape can be approximately described as a sphere

    離散元法（ dem ）是分析散體力學行為的數值方法，顆粒離散元法適用於單個幾何形狀可用圓球近似而不產生顯著差異的情況。
  13. Imev and the data in which the energy respectively is 166mev 139mev, 104mev, 90mev. on the basis of two wave functions and two optical potentials above mentioned, we have investigated a serie s of knockout reactions : through the comparing of two wave functions and two optical potentials, we find that two a cluster relative vave functions which contribute to the energy sharing results of the reaction sections are very well, especially for the ; that the received spectroscopic factors used vfm ( r ) are better than that used ; that the former not only suits to the elastic scatterings but also to the knockout reactions ; that the a cluster of knockout reactions are its local behaviors of surface. and we further testify that the distorted influences are not neglected if the incidence energies are not very high, but can be used the plane wave impulse approximate method and neglect the effects of the distorted influences if the incident energies are high enough

    在利用上述的兩種束縛態波函數和兩種光學勢的基礎上，我們研究了一系列的敲出反應：通過對比兩種束縛態波函數和光學勢，我們得到的結論是：兩種束縛態波函數和光學勢對反應截面的能量分配譜的貢獻都比較好，但尤以波函數_ （ li ） （ r ）為佳；光學勢v _ （ clu ） + （ r ）得到的光譜因子比用woods - saxon勢v _ （ ws ） （ r ）的結果要好，它不僅能適用於彈性散射，且對敲出反應也能得出比較好的結果；集團的敲出反應是集團表面局域性的表現：在中低能的入射條件下，扭曲效應不能忽略，但入射能量較高時，扭曲效應影響較小，可以用平面波沖量近似的方法。
  14. The 4th order mathematic model of the load simulator is established and its linear form is obtained by linearizing at operating conditions. also the coefficients of the linear model are calculated and discussed, based on measured characteristics of the proportional valve

    然後採用了機理建模的方法建立了系統的四階數學模型，應用工作點近似線性化的方法，對系統進行線性化處理。
  15. ( 5 ) discuss some mathematical models of the pollutant transport problems in some local river flow fields. by integral transform method, the paper establishes the usual finite difference approximation scheme to solve the numerical solutions and gives examples for the computation of the approximating solutions, moreover, discusses one - dimensional characteristic finite difference method for a convection - diffusion equation under usual conditions

    （ 5 ）針對水域中污染物輸移問題的數學模型，通過積分變換法，得到了簡化模型在理想化條件下的近似精確解，同時給出數值算例，並且對非理想化條件下模型的特徵差分方法進行了討論。
  16. In order to predict hydrodynamic characteristics a computational system is developed including determination of the pressure distribution on a wing section by use of the conformal mapping method and panel method respectively and of the flow in boundary layer according to the thin shear layer approximation ( tsl ) for navier - stokes equation approach. the wing sections of naca4412 and naca0012 are applied to test the computational system. the numerical inspection shows that the panel method with better precision and the momentum and the displacement thickness of boundary layer can be used to complete this calculation

    本文分別用守屋的保角變換法和基於源匯渦分佈的面元法，建立了計算槳葉表面壓力分佈的數學模型；應用納維-斯托克方程的薄層近似理論模式和有限差分數值方法，建立了計算機翼表面邊界層內部流動的數學模型；應用槳葉表面邊界層內部粘性流動和外部勢流流動在邊界上的匹配演算法，建立了槳葉表面二相流流動的計算方法和相應的計算機程序。
  17. Two test methods are employed : one is loading the samples before thawing, and the other is loading the samples after completely thawed. the coefficient of thaw settlement as a function of granule, as a function of water, and also as a function of dry density are protracted ; besides, the consolidation coefficient of thawed samples as a function of granule, as a function of water, and as a function of dry density are protracted. we can discover from the test results that the thaw - settlement coefficient and the consolidation coefficient of thawed samples are mainly relevant to the granule, dry density and the water content they have little to do with the geology and geography factor of the frozen soils

    為了研究季節凍土區工業民用建築的基礎淺埋穩定性問題，特開展了有關季節凍土的融化壓縮特性的研究，先後在內蒙古農業大學三個比較典型的建築地點取了將近三百個試樣，在室內進行試驗，採取兩種試驗方法即先融化后壓縮試驗法和同時融化壓縮試驗法，通過對這三個不同地點的兩種不同的試驗方法的試驗結果進行對比分行，分別繪制了融沉系數與凍土的含水（冰）量、干容重以及顆粒級配的關系曲線;融化壓縮系數與凍土的含水（冰）量、干容重以及顆粒級配的關系曲線，由試驗結果發現凍土的融沉系數和融化壓縮系數都與凍土的含水量呈正向相關關系，可近似的用線性方程來表示;兩種實驗方法的總沉降量與凍土的含水量呈正向相關關系，與凍土的干容重呈反向相關關系，也可以近似的用線性方程來表示。
  18. We look at the problem of learning from examples as the problem of multivariate function approximation from sparse chosen data, and then consider the case in which the data are drawn, instead of chosen, according to a probability measure

    並檢視稀疏精選值中多變量函數近似法等這些從實例學習法所發現的問題，然後根據機率衡量，審思隨機獲得資料而非選定資料的案例。
  19. Further, analyse the characteristic of the seismic wavefield of fractural reservoir and the influence caused by fracture density, property of the filled material and the strike of fracture. fifthly, in term of research of zhangshulun et al., concisely discuss the arithmetic of the plane wave forward modeling and migration with phase shift method, in prestack common offset gathers and check the arithmetic by numerical simulation

    第四，用基於彈性?聲學近似的反射系數計算公式和本文提出的付氏變換子波生成法得到縫洞模型的反射系數模型和子波模型並用vrselrf波場延拓運算元對其進行地震波場數值模擬；進一步分析了縫洞儲層的地震波場特徵及縫洞密度、充填物性質和裂縫走向對其波場特徵的影響。
  20. In most situations, the contradictory requirements of quantum mechanics and general relativity are not a problem, because either the quantum effects or the gravitational effects are so small that they can be neglected or dealt with by approximations

    在多數的情況下，量子力學與廣義相對論的矛盾並不會成為問題，因為通常量子效應與重力效應之一會小到可以忽略，或可以用近似法處理。
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