computational accuracy 中文意思是什麼

computational accuracy 解釋
計算精度
  • computational : adj. 計算的。
  • accuracy : n. 正確，準確（度）；精確。 firing accuracy 命中率。 with accuracy 正確地。
  1. 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
  2. In order to verify the accuracy, credence and effectiveness of the unstructured overset grid algorithm, steady and unsteady flow field of naca0012 airfoil are simulated. the unsteady flow field is caused by the oscillation of the airfoil. the two computational results are both compatible well with the experimental data

    為了驗證非結構重疊網格方法的正確性、可靠性和有效性，本文對基於非結構重疊網格的naca0012翼型的定常流場以及簡諧振蕩的非定常流場進行了數值模擬，均取得了與實驗數據符合良好的結果。
  3. In this paper, high - order accurate weighted essentially non - oscillatory ( weno ) schemes are investigated and their applications in hyperbolic conservation laws are discussed. based on this, a new weno difference scheme which based on dispersion - relation - preserving relation is developed, and representative test cases with this scheme for computational aeroacoustics ( caa ) problems has been implemented and compared in order to test capability of wave capturing ; in addition, weno schemes generally do not converge at high order in the presence of contact discontinuity of euler equations, so a conservative front tracking technique coupling weno schemes and level set method to simulate the translating density profile is presented here, and numerical simulation with this technique for representative test case has been implemented and results show the desired accuracy

    本文研究了高階精度加權基本無振蕩（ weno ）格式及其在雙曲守恆律方程中的應用，在此基礎上作了兩個方面的工作：一是針對高頻聲波問題構造出一種基於保色散關系（ drp ）的weno有限差分格式，並對計算氣動聲學（ caa ）問題的代表性算例進行了大量數值實驗，比較了該格式捕捉波數的能力；另外，針對高階weno格式在處理euler方程的接觸間斷時精度有所降低的問題，研究了利用界面追蹤技術levelset方法和高階激波捕捉weno格式相結合的一種守恆追蹤方法，並且給出有代表性的密度滑移面問題的算例，得到一致高階精度的數值模擬結果。
  4. Advanced theoretical - computational techniques combined with the power of computers provide an understanding of nanosized materials at the atomic scale with an unprecedented level of detail and accuracy, enabling nanosized material design and property prediction to realize

    摘要先進的理論和計算技術結合計算機的威力，提供了在原子層次上了解納米材料及其演化過程細節的可能性，具有無先例的準確性，使納米材料設計和性能預測成為可能。
  5. Computational accuracy of equivalent magnetic charge method is high, but its calculation is complicated

    等效磁荷法計算精度高，但計算過程相對復雜。
  6. ( 4 ) to raise the computational accuracy and efficiency, we have designed a self - adaptive space grid that can guarantee mass conservation and energy conservation, and have also developed the techniques for the time stepsize automatically varying

    （ 4 ）設計了保持質量和能量守恆的自適應空間網格，發展了自動改變時間步長的技術，使之能夠更好地保證計算精度，提高計算效率。
  7. The main goal of this paper is to make a thorough research for the nine - point difference scheme, make clear its advantages and disadvantages, and improve it in view to its main disadvantages to raise the computational accuracy, speed and efficiency

    本文致力於對九點差分格式作較為徹底的研究，弄清其優、缺點，並針對其主要缺點作出改進，以進一步提高整個計算的精度、速度和效率。
  8. Equivalent circuit method is usually used before. this method has apparent defect, that is, the ignorance of higher order mode effect, which can greatly affect the computational accuracy. in cases that require high accuracy, this method is unusable

    以前一般採用等效電路法分析和設計脊波導元器件；這種方法的缺點比較明顯，那就是對高次模的影響不加考慮，使得計算精度大受影響，在較高要求的場合甚至完全不可用。
  9. Aiming at higher computational accuracy, the unstructured hybrid mesh and the distributed parallel computation are used in 3d complex flow field simulation, the combination of these two techniques often causes difficulties in data structure and sub - domain definition because of the non - unification of mesh elements

    在三維復雜外形的流場計算中，為了得到較高的計算效率及保證數值模擬的準確性，經常要採用混合網格及并行計算技術。
  10. Results show that the aspects are obviously improved in the requires of functional qualities, computational accuracy, convengence and computational speed of algorithms. by this, the new technique of variational data assimilation maybe has wilder application in practice

    所得結論表明，與傳統的四維變分同化方法相比，本文提出的方法在函數性態要求、計算精度、演算法收斂性和計算速度方面有了明顯改善，使得變分同化技術有可能更廣泛地應用於實際業務。
  11. As an example, the implementation of the laplace equation with the gridless method has been presented at first and the resulting large scale matrix equations are solved by gmres algorithm. the numerical simulations of the flows over a cylinder are tested successfully with clouds of different scales, which shows the " cloud " effects on the computational accuracy

    本文先以代表定常不可壓位勢繞流的laplace方程為例，研究了laplace方程的無網格離散形式，並運用gmres高效演算法對其快速求解，數值模擬了典型的圓柱繞流；並通過不同點雲尺度的數值模擬，顯示出點雲尺度對計算精度的影響。
  12. The hydrauli c model of gradual dike - break simulates numerically the 2 - d flow of gradual dike - break waves. it shows the variation of flow field on breach, and the complicated flow characteristic of the propagation, diffraction, reflection and deformation of the dike - break waves. the hydraulic model can realistically simulate the burst process of dike, and computational accuracy is satisfied with the engineering demands

    本文建立逐漸潰堤的水力模型首次對二維逐漸潰堤波的流動問題進行了數值研究，揭示了逐漸潰堤過程中潰口處流場的變化情況，以及潰堤波的傳播、繞射、反射及變形的復雜運動特徵，能較好地模擬實際工程中的潰堤失事，模擬比較逼近於真實潰決過程，計算精度可滿足工程要求。
  13. Creep analysis methods of high - rise buildings and large span buildings can only refer to creep coefficient method in bridge engineering or the method of degree of creep in hydraulic construction engineering under the present experiment conditions. in this paper, the incremental expressions of concrete creep and shrinkage strain when the initial computational age is not the same as the loading age are derived and corrected from the concept of concrete creep coefficient and the mean value theorem of integral and the principle of superposition. the differences of efficiency and accuracy of creep analysis between the finite element method with creep coefficient and the initial stress method with degree of creep are presented. this paper suggests that engineers should use the initial stress method with degree of creep to estimate the influences of creep on high - rise buildings and large span buildings on the basis of conceptual design

    基於現有的試驗資料，高層及大跨度民用建築的徐變分析只能參照橋梁結構中的徐變系數方法或水工結構中的徐變度方法進行.從徐變系數的定義出發，利用積分中值定理和疊加原理，推導並修正了加載齡期與起算齡期不同時徐變收縮應變增量的表達式，對比了應用徐變系數分析徐變的有限元法和應用徐變度分析徐變的初應變法在效率和精度上的差別，並建議應從概念設計的角度出發，採用徐變度的初應變法來估算徐變對高層及大跨度民用建築的影響
  14. Abstract : creep analysis methods of high - rise buildings and large span buildings can only refer to creep coefficient method in bridge engineering or the method of degree of creep in hydraulic construction engineering under the present experiment conditions. in this paper, the incremental expressions of concrete creep and shrinkage strain when the initial computational age is not the same as the loading age are derived and corrected from the concept of concrete creep coefficient and the mean value theorem of integral and the principle of superposition. the differences of efficiency and accuracy of creep analysis between the finite element method with creep coefficient and the initial stress method with degree of creep are presented. this paper suggests that engineers should use the initial stress method with degree of creep to estimate the influences of creep on high - rise buildings and large span buildings on the basis of conceptual design

    文摘:基於現有的試驗資料，高層及大跨度民用建築的徐變分析只能參照橋梁結構中的徐變系數方法或水工結構中的徐變度方法進行.從徐變系數的定義出發，利用積分中值定理和疊加原理，推導並修正了加載齡期與起算齡期不同時徐變收縮應變增量的表達式，對比了應用徐變系數分析徐變的有限元法和應用徐變度分析徐變的初應變法在效率和精度上的差別，並建議應從概念設計的角度出發，採用徐變度的初應變法來估算徐變對高層及大跨度民用建築的影響
  15. This paper presents monomodality registration of rigid body, elastic rigistration of non - rigid body and interpolation used in image registration. by comparison of several interpolations, because of the best tradeoff between accuracy and the computational cost, cubic spline interpolation is selected as interpolation of this paper ' s registration

    首先通過對配準中所採用的幾種插值演算法進行了比較，選出了有較高插值質量和有較高計算效率的三次樣條插值演算法作為本文中配準方法所採用的插值。
  16. After the comparing the simulation results with the theoretic results under the three followed condition : a point light source on the parabola reflector focus, a point light on the ellipsoid reflector focus and a point light source before the parabola reflector focus, a conclusion is gotten that the two results are generally accordant, the accuracy of the simulation software reach the engineering requirements and the computational simulation software of photometric characteristics of headlamp of motor vehicles can guide the design of the headlamp reflectors

    比較了點光源位於拋物面反射器和橢球面反射器焦點的情況和點光源偏離拋物面焦點的情況下照度的理論計算結果和採用本文的照度模擬計算結果，其模擬計算結果和理論計算結果基本相符，能滿足工程上的要求，說明模擬計算軟體對前照燈的反射鏡的設計具有很好的指導意義。
  17. Besides, traditional hydraulic method is commonly adopted to water surface computation in which section - averaged hydraulic parameters are used. the accuracy is quite low. it is backward comparing with modern computational fluid mechanics

    此外，目前航道整治設計中水面線的計算一般都採用傳統水力學的斷面平均水力要素計算方法，精度較粗，大大滯後於當今計算流體力學研究水平。
  18. A new approach for initial localization of the mobile robots, namely complete line segments ( cls ) based localization was proposed. the definitions of cls as well as its properties and decision rules were given. the experimental results show that this method has much higher computational efficiency and better localization accuracy

    作者先針對目前機器人定位研究中的難點? ?初始定位，結合激光測距雷達的數據特點，提出了基於完整線段（ completelinesegments ， cls ）的初始定位方法，包括cls的定義、性質和判定方法，並在機器人試驗平臺上進行了實驗。
  19. First, the mean field method is studied in wdm systems with different dispersion maps. by employing this method the computational complexity is greatly reduced without significant sacrifice of the accuracy of the results

    首先討論了在不同色散管理方案下平均場方法的應用，該方法在不降低模擬精度的情況下大大縮減了所需運算量。
  20. The details of the construction and characteristics of the new finite - difference scheme are presented in this thesis, by using both the integration theorem and the taylor expansion theory. it is proved that the new approach has the second - order accuracy on the grids with axis - symmetric voronoi cells and at least has the first - order accuracy in general. according to this character of the scheme and the computational requirements of the finite - difference approach, a striping procedure is involved to decompose the velocity model into variable spatial size grids with a nearly constant tune step preserved

    本文從積分定理和taylor展開兩個角度，詳細分析了基於voronoicell的非規則網格有限差分演算法的構造過程及性質，並且在理論上證明了本文的差分方法的精度與網格形狀的關系：當voronoicell為關于節點的軸對稱圖形時，本文差分方法具有二階精度；在一般的網格上，則至少具有一階精度。
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