boundary-element method (bem) 中文意思是什麼

boundary-element method (bem) 解釋
臨界元素法
  • boundary : n 邊界，疆界，限界 （between）;（球場）邊線；界標；界限，范圍，分野。 aboundary dispute 邊界糾紛...
  • element : n 1 要素；成分；（構成）部分；分子。2 【化學】元素；【數學】元，素；【機械工程】單元；單體；【無...
  • method : n 1 方法，方式；順序。2 （思想、言談上的）條理，規律，秩序。3 【生物學】分類法。4 〈M 〉【戲劇】...
  • bem : 拜姆
  1. A convergence acceleration technique, boundary element method ( bem ), spectrum of two - dimension solutions ( s2ds ) method are used separately in solving dyadic green function of the three domain. next, waveguide narrow - wall slots array ' s is introduced in this paper

    對外部空間，與縫隙腔體區域一樣認為場量與z無關，對所有場量做z方向的fourier變換，得到譜域上的一系列去耦合的二維方程。
  2. ( 3 ) uniformed contours stacked together and constructed real boundary element method ( bem ) calculation models for e / meg research respectively by minimum distance method and 3d - delaunary based triangulation growth method. finally developed visualization algorithm based on surface rendering for the purpose of integration of structure and function information

    在構建剖分模型上，用基於最短對角線（在兩層輪廓中心偏離較大的情況下，對輪廓進行了對中變換）和基於3ddelaunay的方法構建了計算模型；基於表面繪制的思想，實現了頭和腦的可視化。
  3. In this dissertation, the numerical computation for the acoustic radiation problem ( arp ) is studied deeply and systematically in the theory, method and the application technique, based on analyzing the situation of the home and abroad on the numerical computation for the acoustic radiation problem. the calculation formulas of the boundary element method ( bem ) for the exterior acoustic radiation problem in the full - space and half - space are deduced, based on the wave propagation theorem ; the arising of the non - unique solutions, which is associated with the application of the boundary integral equation ( bie ) in acoustic radiation problem, is analyzed and proofed ; the improved combined helmholtz integral equation formulation ( ichief ) is presented to overcome the non - uniqueness problem more effectively and reliably ; the determination of the singular integral coefficients on various occasions is analyzed ; the properties and treatments of the singular integrals with different orders axe studied ; the computation program of the cubic spline ichief is developed and its ability to overcome the non - uniqueness problem and feasibility to discrete the surface coarsely with the sufficient calculation precision are examined through examples

    第二章在聲波動理論基礎上，詳細地推導出對應于無限域和半無限域的外部振動聲輻射問題的邊界積分方程計算公式；根據fredholm積分理論，對利用邊界積分方程計算振動聲輻射問題過程中解的非唯一性的產生進行了分析和證明；改進了chief法以提高其克服解的非唯一性的有效性和可靠性；對不同條件下奇性系數的計算、強奇性積分的收斂性及其在變量替換時與普通積分的差異性、不同階奇性積分的計算、數值求積分等進行了研究；開發了三次樣條改進chief法計算軟體，並通過算例考核了該方法在特徵波數處克服解的非唯一性的有效性和在保證計算精度的前提下實現剖分粗化以提高計算效率的可行性。
  4. In part i, based on the systematic review of the study history and prospect of nwt, the detailed process of a 2 - d nwt model developed independently is reported. the two key discretization methods, boundary element method ( bem ) and mixed eular - langurange ( mel ) method, are introduced in detail, and an integrated flow chart of the detailed time - domain simulation steps of nwt is presented

    第一部分在回顧數值波浪水槽發展歷程、現狀及其應用前景的基礎上，重點報告本人獨立開發二維非線性數值波浪水槽模式的研究工作，其中包括構建數值波浪水槽的運行原理和具體步驟等全過程。
  5. A nonlinear numerical model for wave transformation is established in time domain based on integral equation transformed from two dimensional laplace equation. then the model is applied to compute the linear wave and nonlinear wave deformation in offshore flow field. a new 0 - 1 combined bem ( boundary element method ) is adopted in this thesis to avoid computational errors accumulated with time steps

    本文以波動勢函數的laplace方程的green積分轉換得到的邊界積分方程為基本控制方程，建立了一種新的時域內波浪變形計算的數值模型，籍此對非線性波浪在結構物周圍的波浪形態進行了數值模擬，並通過數值造波水槽內的波浪試驗對數值模擬結果進行檢驗。
  6. Based on some discussions on the mathematic model set up for the cathodic protection potential field, a two - dimensional boundary element method ( bem ) is developed, and by using which, a study on the shielding effect resulted from some typical inner structures such as the reinforcing elements and the partition walls with man holes on distribution of potential and current density in the cathodic protection is performed. the investigated parameters which affect the shielding effect in the calculating model include : the height and thickness of the reinforcing elements, the distance between the anode and the reinforcing elements, and the diameter of man hole on the partition walls, and so on

    本文在討論了陰極保護電位場問題的數學模型的基礎上，以二維邊界元法對陰極保護問題中的電位及電流密度分佈進行了模擬計算，重點對船舶壓載艙中的典型結構如加強筋、人孔等在陰極保護中所產生的屏蔽效應進行了分析和研究，通過對不同高度、厚度的擋板及不同孔徑的帶孔板所產生的屏蔽效應進行模擬計算，首次得到了一些對實際工程設計具有重要參考意義的見解。
  7. As an effective numerical analysis method of scientific and engineering problems developed following finite element method ( fem ), boundary element method ( bem ) has some attractive advantages, such as easier simulating complex boundary shape, high accuracy and dimension reduction

    邊界元法是在有限元法之後發展起來的一種精確高效的工程與科學問題的數值分析方法，具有便於模擬復雜邊界形狀、求解精度高、降維等優點。
  8. The boundary element method ( bem ) is applied to compute crack open displacement ( cod ). because of unit area being resolved or linear integrated, the efficiency and precision of boundary element analysis are improved greatly

    採用裂紋張開位移全場擬合法（ gcdfp ）求出裂紋面前緣的應力強度因子（ sif ） ，所得到的sif達到與所用的裂紋張開位移（ cod ）資料同樣的精度。
  9. To solve the three - dimensional homogeneous field region, the boundary element method ( bem ) was described in chapter 2

    第二章論述了如何應用邊界元數值計算方法求解三維均勻場域，並用visualc + +語言編制了相應的計算程序。
  10. This article uses foundation layered elastic modle which is analogy to the real project, deduces and solves the plate by boundary element method ( bem ) and summing in layers method

    本文選用與實際工程場地特性較為接近的分層彈性地基模型，採用邊界元法推導並求解中厚板。
  11. Under the networked pc cluster parallel computing environment, the parallel boundary element method ( bem ) used to analyze elasto - static, elasto - dynamic and elasto - plastic structure is studied in this dissertation and applied to analysis of hydraulic structure

    本文主要在網路微機機群并行計算環境下，對彈性靜力、彈性動力和彈塑性結構的并行邊界元分析方法進行了研究，並在水工結構分析中進行了實際應用。
  12. Although the boundary element method ( bem ) is recognized as the most efficient one to solve this kind of problems, the inherent conflicts between the simplicity of the method and the complexity of the practice block the large - scale application of the bem

    對于這類逆熱傳導問題，現在公認有效的解決方法是利用邊界元方法（ bem ） 。許多前人在這方面的作了大量的研究工作，取得了不少的研究成果，但是也存在著不少的局限性。
  13. 2. using a new method, virtual boundary element method ( vbem ) to electromagnetic calculating. this method, same as boundary element method ( bem ), need not analysis all the field area, and need not specially deal with no closed in boundaries. future more, vbem has advantage in calculating speed, and can avoid singularity integrating being predestined in bem

    2 .使用了一種新方法，虛邊界元方法用於強流電子槍電子軌跡的模擬，這種方法與邊界元法一樣不須要對所有場域進行計算，對于不封閉場域不須要做特殊處理，從而避免了有限元法和有限差分法的方法缺陷，它具有計算速度快的優勢，且不存在邊界元法所不可避免的奇異積分。
  14. Abstract : the slope dynamic stability with elasto - dynamics vibration and wave theory and boundary element method ( bem ) is analyzed and calculated. it raises a criterion for slope dynamic stability. it gives an exmple for calculating the stability of soil slope under the action of earthquake waves emitted from underground and draws the dangerous range in which the slip line lies

    文摘:主要分析邊坡動態穩定性問題，採用地震波作動載荷，用邊界元法對邊坡進行分析，並在計算機上實現.對動態穩定性判據從理論上進行了探討，給出了動力危險線的位置
  15. There are three main approaches to predict the noise level : similitude structure method including the frequency - response method and proportion method, modal method including finite element method ( fem ) and boundary element method ( bem ), and statistical energy analysis ( sea ). the advantage of similitude structure method is to give the predicting data fast, but it has some error because of dealing with rough similitude parameter and mass load

    目前對噪聲預示主要有三個方法：一是相似結構外推法，包括頻率響應法和比例法等；二是傳統的模態方法，包括有限單元方法（ finiteelementmethod ， fem ） 、邊界單元方法（ boundaryelementmethod ， bem ）等；三是統計能量分析方法（ statisticalenergyanalysis ， sea ） 。
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