積分有限差分 的英文怎麼說

中文拼音 [jīfēnyǒuxiànchāfēn]
積分有限差分 英文
integral finite difference
  • 積 : Ⅰ動詞（積累） amass; store up; accumulate Ⅱ形容詞（長時間積累下來的） long standing; long pending...
  • 分 : 分Ⅰ名詞1. （成分） component 2. （職責和權利的限度） what is within one's duty or rights Ⅱ同 「份」Ⅲ動詞[書面語] （料想） judge
  • 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
  • 差 : 差Ⅰ名詞1 （不相同; 不相合） difference; dissimilarity 2 （差錯） mistake 3 [數學] （差數） differ...
  • 積分 : 1. [數學] integral; integrate; integration 2. [體育] （積累的分數） accumulate points
  • 有限 : limited; restricted; finite; a little; not much
  1. 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。
  2. 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。
  3. In the paper, river and the downstream area of dike are regarded as a whole system, and hydraulic model of coupling 1 - d river and gradual dike - break is established, therein the preissmann implicit difference scheme is applied to main river, and the fvm ( finite volume method ) is applied to the breach and polder

    本文將河道與堤壩下游區域視為一個整體，對于單一河道採用preissmann四點隱式差分格式計算，對于潰口及圩區採用有限體積法，建立了一維河道與堤壩漸潰耦聯的水力模型，也是一維、二維耦合的水流模型。
  4. In this paper, the main research works are as follows : 1 ) survey and analysis previous work in auv navigation and summarize : as the cumulate error, the dead - reckoning and inertial navigation systems ca n ' t be used without other modified system ; the acoustic navigation system is used only in small range, and is very expensive. 2 ) two important approaches in geophysical navigation techniques are summarized, one is terrain contour based navigation, this approach is investigated keystone today ; the other is image based navigation, due to no perfect image sensors and image seabed map, this approach has seldom been practised. 3 ) two important terrain contour based navigation algorithms has been applied to auv, one is match algorithm - based terrain contour match ( tercom ) ; the other is kalman filter - based sandia inertia terrain - aided navigation ( sitan )

    主要研究內容包括：一、總結分析了當前水下導航的常用方法和不足之處，指出基於航位推算的導航方法，存在著最大的問題就是導航誤差的積累問題，如果沒有修正系統，這種方法很難滿足使用要求；其次指出基於聲學的導航方法，造價昂貴，導航范圍有限，難以滿足自主水下航行器大范圍導航的需求；二、總結了當前水下地形輔助導航的主要技術路線，一是基於地形高程的匹配方法，這是當前研究的重點；二是基於地形圖像的匹配方法，由於缺乏良好的圖像傳感器，和可用的海底圖像地圖，目前這種方法還有待研究發展；三、將兩種地形高程匹配的常用方法應用到自主水下航行器上：以相關演算法為前提的地形輪廓匹配（ tercom ）方法和以卡爾曼濾波為基礎的桑迪亞慣性地形輔助導航（ sitan ）方法，前者演算法簡單可靠，但是導航精度不高，後者雖然精度比較高，但存在著演算法較為復雜、有可能發散和出現奇異值等問題。
  5. Compared with octree data structure, the omni - tree data structure could reduce the meshes " total numbers and get better mesh quality. this paper uses cell - centered finite volume spatial discretization and four - stage runge - kutta time - stepping scheme with some convergence acceleration techniques such as local time stepping and enthalpy damping

    在流場計算中，本文採用格心格式的有限體積法用二階中心差分對歐拉方程作空間離散，用四步龍格庫塔方法作顯式時間推進。
  6. In this paper, the upwind scheme and the central scheme are presented for solving 3 - d n - s equations using the cell - center finite volume spatial discretization and four - stage runge - kutta time stepping scheme, with standard convergence acceleration techniques such as local time stepping and implicit residual smoothing

    在n - s方程的數值計算上，採用了中心差分格式和迎風格式，用格心格式的有限體積法進行了空間離散，用四步龍格?庫塔法作顯式時間推進，並採用了當地時間步長和隱式殘差光順等加速收斂措施。
  7. In this paper this problem is calculated by using finite volume method that prouduce though finite difference method and finite element method, and obtained the velocity and pressure distribution, through the compare between numerical result and model experiment result, there is very good inosculation

    本文利用有限差分法和有限元法所派生出的有限體積法對其進行數值計算，求解出計算區域的速度及壓力分佈，數值計算結果與模型試驗結果吻合較好。
  8. In the process, we import the displacement method " s concept of replacement ahead, that is to say, we replace the unknown vectors with new unknown vectors to prevent the delivering and accumulation of errors. at the same time, we completed the skew bridge calculation procedure, and compared the calculation results with the results by the finite element software ansys, it proved the correctness and practicality of this procedure

    在矩陣傳遞的過程中引入位移法中的前進代入的概念，即將未知向量不斷的以新的未知向量替換，以防止誤差的傳遞和積累。本文完成了斜交格子梁橋的內力計算程序，並將計算結果與採用有限元分析軟體ansys分析計算的結果進行了比較，驗證了程序的正確性和實用性。
  9. Measurement of marine sediment and modeling acoustic wave with a finite - difference method

    海底沉積物聲波現場測試和有限差分數值模擬研究
  10. A simplified set of equations for analysis of the filling. finite difference methods are used for the pressure calculation. advancement of flow f ront uses a control volume approachand dynamic simulation of the moldfilling process is achieved. other is wetting out process which is the most critical stage in rtm. this stage is a typical porous media flow problem

    從粘性流體力學的質量和動量方程出發，建立了描述充模流動過程的數學模型，利用有限差分法求解壓力方程，並利用控制體積法跟蹤流體前沿；第二部分是充模流動的主體部分，屬于典型的多孔介質的流動問題。
  11. On the basis of the theory about water potential in soils, a partial differential equation of water movement in unsaturated soils is derived, which chose volumetric water content as the control variable. the numerical solution of the equation using finite difference method is discussed in this paper, and the modality to calculate water movement in slope considering rain infiltration

    基於非飽和土的土水勢理論，本文推導了以體積含水率為因變量的二維非飽和土的水分運動方程，並給出了用有限差分法來求解此偏微分方程的方法，得到了考慮降雨入滲影響的土坡水分運動的計算程式。
  12. The transient mathematical equations are addressed for the coupled heat and moisture transfer by taking account of moisture accumulation procedure. an analytical method by means of the transfer function is proposed to predict the transient distributions of temperature and moisture content at different interfaces in walls. a numerical analysis approach based on an efficient finite - difference method is developed to deal with the procedure of coupled heat and moisture transfer in a multilayer wall with nonlinear boundary conditions considered

    建立了考慮濕積累過程的瞬態熱濕耦合模型，在方程中引入了濕積累項；發展了一種傳遞函數解析方法進行墻體內不同剖面處溫度和含濕量的動態預測；首次提出了一種基於有效有限差分法預測非線性邊界條件下多層多孔結構內的傳熱傳濕過程的數值分析方法，求解過程中考慮了瞬態邊界條件，從而避免了通常處理中由於邊界條件設定為常數而給計算帶來的誤差，對于多層結構每一層物性參數的非連續性，則採用了有效的有限差分逼近處理。
  13. According to different water phenomena, we use two different method to produce waves source : the first method is by specifying the boundary conditions and initialization conditions, this method simulate the dam breaking, reflection and diffraction of water waves ; the second method is by specifying disturbance model, this method simulate water droplets, waterfall, waves of ship ; in the first part of this thesis, we discuss the prevalent methods of the simulation of water scenes, in the second part of this thesis, we describe the numerical methods of solving the shallow water equations using the finite difference method and the finite volume method respectively, in the third part of this thesis, we simulate some realistically liquid phenomena such as rain droplets, the waves of ship, dam breaking etc

    產生水波首先要有波源，設置不同的波源便可以得到不同的水流情形，我們用兩種方法來產生波源：一種是通過設置邊界條件和初始條件產生，這種方法用於模擬潰壩波的反射、折射等現象；另一種是通過擾動控制產生，這種方法用於模擬雨滴、瀑布、船波等自然現象。本論文的第一部分我們討論了目前水動畫模擬常用的幾種方法；在第二部分討論了我們所使用的兩類數值方法：有限差分方法和有限體積方法；在第三部分我們模擬了雨滴、船波、潰壩波等一些水流現象。
  14. Topics include : mathematical formulations ; finite difference and finite volume discretizations ; finite element discretizations ; boundary element discretizations ; direct and iterative solution methods

    課程主題有：數學列式、有限差分與有限體積離散、有限元素離散、邊界元素離散、直接與疊代解法。
  15. Fdtd method ; subcell technique ; round contour integration method ; conducting thin - wire

    時域有限差分法亞網格技術圓形積分迴路法細導線
  16. ( 3 ) on parallel computing of the third generation ocean general circulation model from lasg / iap i ) we present an optimization model by multi - overlapping - boundary for parallel explicit integration with finite difference discretization, and point out that the gap between speed of network and cpu makes it a practical technique. we compare the parallel characteristics of spectral element and finite difference from the point of view of communications, communication - to - computation ratio and scalability

    （ 3 ）關于中科院大氣物理研究所第三代海洋環流模式的高效并行計算? ）基於對有限差分離散的分析，提出了一個面向顯式時間積分并行計算的多重疊國防科學技術大學研究生院學位論文邊界優化模型，指出了網路速度與處理器速度間的落差使得採用冗餘計算取代部分通信成為一種具有相對優勢的實用技術。
  17. The round contour integration method is proposed to accurately simulate the currents on conducting thin - wire by using the subsell technique in the finite difference time domain fdtd method

    提出了在時域有限差分fdtd方法中應用亞網格技術精確模擬細導線上電流的改進方法圓形積分迴路法。
  18. In this paper, the finite difference method is used to solve the diffusion equation and the spherical particle is discretized with iso - spacing grids and iso - volumetric grids respectively

    採用有限差分法數值求解擴散方程，分別利用等距網格和等體積網格劃分計算區域。
  19. Researchers suggested many numerical methods convenient for the engineering, such as the rayleigh - ritz method, galerkin method, finite difference method, finite integral method, finite element method, etc

    研究人員先後提出了便於工程應用的瑞利-里茲法、伽遼金法、有限差分法、有限積分法、有限單元法等數值計算方法。
  20. The finite difference method and matlab / simulink are used to simulate the pressure transients accompanying the growing and collapsing of gas bubbles and cavitation in low pressure hydraulic pipelines. a method using selector block in matlab simulink to solve the equations in spatial dimension is developed. the pressure transients under different conditions such as different initial flow rate, different viscosity and different initial gas bubble volume are simulated

    採用有限差分及matlab / simulink模擬方法，提出了採用simulink中selector模塊求解空間域上積分的方法，對低壓液壓管路有氣泡和氣穴產生的瞬態壓力脈動過程進行了時間域和空間域上的求解，對不同起始流量、不同液壓油粘度和不同初始氣泡量等條件下的瞬態壓力脈動過程進行了模擬研究。
分享友人
分享到 Line

分享到臉書