concentric method 中文意思是什麼

concentric method 解釋
集中法
  • concentric : adj. 同心的，同軸的 （with）; 集中的，會聚的。 be concentric with 與…同心。adv. -ally ,-ity n.
  • 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】...
  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. This paper investigates the pressure sensitivity of an interferometric fiber - optic hydrophone element with a concentric mandrel including an enhanced sensitivity layer based on the theory of elastic mechanics and finite element method ( fem ) and then investigates its harmonic frequency and vertical directional property using fem, and verifies all the results derived from theoretic analysis at last

    本文分別基於彈性力學的理論和有限元的方法對含彈性增敏層的同軸干涉型光纖水聽器基元的聲壓靈敏度進行研究，並基於有限元的方法對其諧振頻率和垂直指向性進行分析，最後用實驗對各項分析結果進行了驗證。
  3. According to non - newtonian fluid mechanics theory and mathematical method, conbined with plunger moving property, the hypothesize fluid is imcompressive, hydraulic radius of flow of liquid in crevice is very little, and it is laminar flow, the flow is treated fixed continuous flow at every instant position of plunger, equation of motion and boundary condition were set up in condition of concentric and eccentric of pump barrel and plunger

    運用非牛頓流體力學理論和數理方法，結合抽油泵柱塞運動特點，假設液體為不可壓縮的，液體在縫隙中流動的水力半徑很小，呈層流流動，柱塞在每一位置的瞬間，流動做定常流處理，建立了泵筒與柱塞同心和偏心兩種情況下運動方程和邊界條件，引入無量綱坐標、無量綱速度和柱塞與泵筒偏心配合時的縫隙高度，並給出縫隙流流速、流量的解析解。
  4. Abstract : the paper analyzed the properties of concentric curve, theprinciple and method of setting out stakes of middle - line & sidings on one random station and closed with main points

    文摘:分析了同心曲線的性質，提出了可在任意點設站測設同心曲線的原理及放樣同心曲線的中線、側線各樁並閉合於各自主點的方法
  5. To study the resonant characteristics of eccentric circular and concentric circular - elliptical ring microstrip antennas, the method, which is connected with the concentric ring microstrip antenna and based on the perturbation, is employed to calculate resonant wave numbers. comparisons of calculations with reference for the fundamental mode are also presented, agreement is very good for small eccentricity

    為研究偏心圓環及同心圓-橢圓環微帶天線的諧振特性，運用了一種以對同心圓環微擾為基礎的計算方法，計算的諧振波數值與參考文獻作了比較，在小偏心率的情況下，一致性很好。
  6. Non - destructive testing ; eddy current testing of pipes and tubes ; reference method for the determination and calibration of the properties of an eddy current testing system using concentric test coils

    無損檢驗.管道和管子的渦流檢驗.用同心試驗線圈的渦
  7. The current trends of this field is to acquire the current density of dipole distribution rather than a few dipoles. based upon that, a new model was proposed - dipole layer localization method ( dllm ) : spherical dipole layer was used as source model, on which dipoles were distributed by equilateral triangles ; three concentric inhomogeneous sphere was used as head model, which contains scalp, skull and cortex with different conductance. the dipole distribution and scalp potential tomography were obtained with singular value decomposition ( svd )

    鑒于該領域的研究趨勢已從求取少數偶極子過渡到偶極子分佈密度的獲得，本文提出了新的模型? ?偶極面定位方法（ dipolelayerlocalizationmethod ， dllm ） ：以等邊三角形均勻分佈的偶極子構成的偶極面（球面）作為源模型；包括頭皮、顱骨和皮層的三層同心介質球作為頭顱模型，運用奇異值分解來求解逆問題，從而獲得偶極子分佈和頭皮電位分佈，實現三維成像。
  8. Non - destructive testing ; eddy current testing of pipes and tubes ; general remarks on testing using concentric test coils and the single - frequency method

    無損檢驗.管道和管子的渦流檢驗.用單頻率法和同心試
  9. Methods of dust character test - part 11 : determination of field resistivity - concentric rings method by means of filtration

    粉塵物性試驗方法第11部分:工況粉塵比電阻的測定過濾式同心圓環法
  10. In this article, the main works as follows : 1 ) talk over some basic ideas about ibr, such as, plenoptic modeling lumigraph concentric mosaics 2 ) put forward a new method about 3d animation combining reality with virtuality a. spacing matching b. lighting and shadow matching c

    1 ）全光模型； 2 ）光圖函數； 3 ） 「同心圓拼圖」方法；二、利用「虛實結合」的方法構建建築場景，探討了一種簡便易行的建築動畫方法，並且作了有益的實踐嘗試。
  11. In order to study the stability of non - newtonian fluid and its flow pattern discrimination method, the integral stability theory and local stability theory are applied to the concentric annulus flowing of plastic fluid and power - law fluid, then a relevant stability parameter expression of discriminating flow pattern is derived and set up in the paper

    摘要針對非牛頓流體的穩定性問題及其流態判別的研究，將整體穩定性理論及局部穩定性理論應用於塑性流體和冪律流體在同心環空的流動中，建立和推導出相對應的判別流動狀態的穩定性參數表達式。
  12. Using non - concentric auxiliary sphere method to determine the intersection line of tow curved surfaces

    異心輔助球面法求兩曲面交線
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