two-grid 中文意思是什麼
two-grid
解釋
雙柵的-
Residual a posteriori error estimate two - grid methods for the steady navier - stokes equation with stream function form
方程流函數形式兩重網格演算法的殘量型后驗誤差估計 -
Perfect pre - processing and post - processing function is one of the main factors to evaluate the vitality and market value of the finite element analysis system surveying today development of finite element analysis technology, most of which concentrate on establishing fine user interface, also has some limitation on application, and especially, the research on the visualization of arbitrary cut - plane is always in ascendants to realize the visual processing on cut - plane needs reprocessing the results of finite element analysis which have get, so the algorithm is two parts : seeking the physical value of cut - plane and drawing 2d contours, the former, based on the theory of stress on " arbitrary inclined plane " in physical mechanics, use the method of linear interpolation method to get the coordination and physical value of intersection between cut - plane and element arris ; the latter, based on the tables on elements, nodes, stress and strain, summarize a rapid algorithm of generating 2d contours based on the grid. this thesis synthesizes there two parts and get a visual processing program under fortran
縱觀有限元分析技術的發展，目前大多集中在建立良好的用戶界面上的研究仍存在許多應用上的局限性，其中對任意剖面上可視化的研究仍處于方興未艾的階段。要實現任意剖面上可視化處理，必須先將得到的有限元計算結果進行再處理，因此在演算法上分為兩部分：求任意剖面上物理量值的演算法及二維等值線演算法。前一部分以彈性力學中「任意斜截面的應力」為理論基礎，利用線性插值方法得到截面與單元棱邊的交點坐標及交點物理量值；在此基礎上；根據已得到的單元及節點序號表、應力應變物理量表，總結出一種基於有限元剖分網格的快速生成二維等值線的演算法。 -
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 -
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。 -
This article in the unidimensional interpolation foundation, according to the different data ( grid data and scattered in disorder data ), divides the two - dimensional interpolation into the grid node interpolation and the scattered in disorder data interpolation, realizes the imagery processing and the data visualization with the matlab software
摘要本文在一維插值的基礎上，根據不同的數據（網格數據和散亂數據） ，將二維插值劃分為網格節點插值和散亂數據插值，用matlab軟體實現圖像處理和數據可視化。 -
The two leader behaviors used in the managerial grid are concern for people and concern for production
在管理過程中，這兩種領導行為得到了任何產品。 -
The support vector classifier is adopted to identify fault in the two types, and the grid search method based on cross - validation is chosen to determine model parameters
該模型將變壓器故障分為放電性和過熱性兩大類，通過統計分析尋求特徵量區分類間的故障類型，採用支持向量機識別類內的故障類型，利用基於交叉驗證的網格搜索法來確定支持向量機的參數。 -
The error is related to the two rank partial derivative of the flux function to each factor and the mean variance distribution of each factor on each grid point. the statistical - dynamical parameterization scheme involves the both conditions, therefore, it is more practical for the east china moist region than the mosaic method
另而自乞計一動刀寧腸則院含考慮了要紊的二階偏導數及其在網格元上的分佈的均方差，因而該方案比馬賽克法考慮更為周全（至少在東部涅潤區如此） 。 -
In this paper, river water quality prediction is integrated with water pollution control measures. two parameters, water environmental capacity and pollution index are selected for pollution control measures. the objective is achieved after the development of simulation model using one - dimensional advection dispersion equation. the model algorithm and computer program is an improvement over the existing water quality models, since the model solution involves four point implicit upwind schemes for water quality prediction and pollution control measures at each grid point. model simulation results the assessment of water environmental capacity that yield the acceptable and realistic pollutants concentration in order to maintain water quality objectives. the pollution and overall pollution index of the river is suggested for integrating number of contaminants variables into one index. study provides the mathematical and scientific procedure for water quality management. the new approach is helpful for the water pollution control and to study the impacts of waste effluents on the river system for strategic planning purposes
本文將水質預測及水污染控制措施有機地結合，選取水環境容量和污染指數作為水污染控制的參數.這樣，一維對流-擴散水質方程的求解除就是實現本研究目的的關鍵.本研究採用的模型在現有的水質模型基礎上有所改進，因為其採用四點隱格式對水質進行預測，推求可接納污染物的環境容量值及為保證水質而限定的污染物濃度值，從而制定相應的水污染控制措施.為整體考慮各種污染物的情況，建議採用河流的污染指數進而推求綜合污染指數.總之，本研究為水質保護提供了科學的計算方法，該法對水污染控制及污水對河道水質的影響是實用有效的 -
Sharing the data between these two will simply be a case of parsing and understanding the semantic data - the structure and format - of the two grid systems see figure 5
在這兩個網格系統之間共享數據只是處理並理解兩個網格系統的語義數據：結構和格式（參見圖5 ） 。 -
In 2002, the reform of " seperating power plan and grid, selling with competitive cost " was put into execution formally, at the end of the 2002, five power company, two grid company and four company were founded
2002年， 「廠網分開，競價上網」的改革正式推動，同年底，新組建的五家發電公司、兩家電網公司和四家輔業公司掛牌成立。 -
A two - grid method for the unsteady navier - stokes equations with a penalty form
方程加罰形式的兩重網格演算法 -
Two - grid method for characteristics finite - element solution of 2d nonlinear convection - dominated diffusion problem
二維非線性對流擴散方程特徵有限元的兩重網路演算法 -
A two - grid scheme of nonlinear convection - dominated diffusion problem
非線性對流占優擴散方程的兩重網路演算法 -
Local and parallel finite element algorithms based on two - grid discretization for steady navier - stokes equations
方程的局部和并行有限元演算法 -
A two - grid scheme of characteristic finite - element solution for 2d nonlinear convection - dominated diffusion problem
非線性對流擴散方程特徵有限元的兩重網格演算法 -
Two - grid algorithm for characteristics finite - element solution of 1d nonlinear convection - dominated diffusion equation
一維非線性對流擴散方程特徵有限元的兩重網格演算法 -
In this paper, based on a two - grid approach a multilevel linearization approach and a new cascadic multigrid method is proposed for the second order nonlinear elliptic boundary value problems
本文基於兩網格離散技巧，對二階非線性橢圓邊值問題提出了多重網格線性化演算法和一類新型的瀑布型多重網格法。 -
In chapter 4, for 2d nonlinear convection - dominated diffusion equation, a two - grid scheme of characteristic finite - element solution is constructed. numerical examples are presented and computed with matlab software. the numerical results show that these algorithms are effective and feasible
最後用matlab對給出的數值例子進行編程計算，數值試驗結果表明該演算法是有效可行的，並且能夠極大提高計算的效率。 -
In this paper, two - grid method is constructed. combined with the characteristics method, finite element method and mixed finite element method, for solving nonlinear convection - dominated equations. which can reduce the numerical oscillations of the convection - dominated equations and improve the computational efficiency
本文將特徵線方法、有限元方法和混合有限元方法相結合，構造了求解非線性特對流占優擴散方程的兩重網格演算法。
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