線積分 的英文怎麼說

中文拼音 [xiànjīfēn]
線積分 英文
curvilinear integral
  • 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
  • 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
  • 積分 : 1. [數學] integral; integrate; integration 2. [體育] （積累的分數） accumulate points
  1. The explicit formula for the line - integrated emissivity with taking into account the plasma boundary effect is presented

    本文給出了這種情況下的線積分輻射率明晰表達式。
  2. Based on sale method ( simplified ale, in which the mesh may move with arbitrarily prescribed velocity with respected to the fluid, and lagrange interfaces are maintained between cells containing different material. ), the line loop integral difference scheme is derived which can be used to calculate two - dimensional elastic - plastic flow

    並在sale （ simplifiedale ，一種簡化的ale方法，網格可以任意運動，但物質界面處的網格仍然以物質速度運動，物質界面始終為lagrange網格線以保證網格中只有單物質出現）方法框架下，推導並給出了適用於彈塑性流計算的ale線積分差分格式。
  3. The equations of motion governing the axisymmetric elastic deformation of finite orthotropic cylindrical shells, involving the effect of transverse shear and rotational inertia, are derived. by applying the reverberation method, the displacement and the resultant forces of the shell in the phase space are expressed. then the transient waves in the finite orthotropic cylindrical shell subjected to the axisymmetric impact are obtained by using inverse laplace transforms. furthermore, the transient solutions are decomposed to the generalized ray integrals and computed numerically

    分析了計及剪切變形和轉動慣性的有限長正交異性圓柱殼中彈性瞬態波的傳播問題，採用回傳矩陣法，在相空間中給出了位移和內力的表達式。再利用laplace逆變換，得到正交異性圓柱殼受軸對稱沖擊作用時彈性瞬態波解，然後將其分解為若干廣義射線積分之和，並用數值方法求解之。
  4. If the field changes slowly, we can replace the time integral by a line integral over the unperturbed orbit.

    如果場緩慢改變，我們能夠用未擾動軌道的線積分來代替時間積分。
  5. By the help of geometric significance of plane or space curve and space surface, and by use of the symmetry of curve and surface to coordinate axis and coordinate surface, how to use the symmetry to calculate the surface integral and curve integral is discussed for the odd ( even ) functions that are defined on the curve or surface with symmetry

    摘要藉助于（平面）空間曲線及空間曲面的直觀幾何意義，利用曲線、曲面關于坐標軸及坐標面的對稱性，探討了對于定義在具有對稱性的曲線、曲面上的奇（偶）函數，如何利用對稱性計算曲線積分及曲面積分。
  6. 4. with visco - elastic boundary of soil considered, the eigenvalue equation in frequency domain of soil dynamic equilibrium equation falls into a complex transcendental equation. in course of seeking its solution, based on argument principle and contour integral, with the aid of matlab, two numerical algorithm combined with the corresponding procedures for solving transcendental equations in a complex plane is developed by the author

    4 、由於考慮了土體的粘彈性支承邊界條件，使得其動力平衡方程在頻域內的固有值方程為一復數超越方程，為了求解該方程，筆者基於幅角原理和閉合曲線積分，結合matlab ，提出了復平面上超越方程的兩種數值解法，並編制了相應的程序。
  7. Line integral convolution ( lic ) is one of texture - based methods for vector field visualization. even in the vector direction changing sharply fields, the method can show the direction of the vector field well, and display details of the vector field better. in addition, it can fully disclose the relativity among every spot of the vector field

    線積分卷積（ lineintegralconvolution ， lic ）方法是一種基於紋理生成技術的矢量場可視化映射方法，線積分卷積法能連續反映場中各點切矢，即使在矢量方向變化很大的區域，也能揭示出矢量的方向，可以較好地表達出矢量場的細節。
  8. We also derived the relationship between the radial local density distribution and the observed line integral density distribution by fourier integral transform. on this basis, the density inversion calculation is realized through fft method and is independent of abel inversion

    另外，本文還著重推導了線積分密度分佈和徑向體密度分佈之間的傅立葉積分變換關系，並利用快速傅立葉變換實現了完全拋開abel反演公式的密度反演計算。
  9. From three respects in calculus teaching, this paper has mainly discussed magical effect of physics meaning of questions, which is curve integration curved surface integration and sum of series formula

    摘要微積分的教學離不開問題的物理意義，文章從曲線積分、曲面積分以及級數求和公式的推導等三個方面來說明問題的物理意義在微積分教學中的妙用。
  10. A curve integral method of flood calculations in average flow within the prescribed time

    洪水演算中時段平均流量計算的曲線積分法
  11. Incremental length diffraction coefficients ( ildc ) is adopted to calculate the contribution of edge diffraction. in order to improve the accuracy of calculation, multi - scattering is discussed, based on the two former contributions and ray - tracing method. geometrical optics ( go ) and physical optics ( po ) are used to calculate the multi - reflection between facets and facets

    對于鏡面反射採用物理光學法計算其散射貢獻，結合基於面元的目標模型的表示，採用離散的積分形式，將面電流積分化簡為線積分，簡化計算復雜度；對于邊緣繞射，運用增量長度繞射系數理論計算目標邊緣繞射場；在多次反射中，則以光線跟蹤方法為基礎，採用幾何光學、物理光學相結合的方法分析考慮多次散射場。
  12. The object of single photon emission computed tomography ( spect ) is to reconstruct an unknown radioactivity distribution inside the body from projection data consisting of the number of photon collected on a collimated gamma camera. these projections are not simple line integrals but have point - spreads due to the imperfect collimator of the detector and attenuation due to the compton scattering. so

    這種投影數據與透射ct中的數據不同，由於存在著光子的點擴散（由準直器引起）和衰減（由散射引起） ，已經不能用簡單的線積分來描述這個問題，因此相對于透射ct而言，這個領域將面臨很多困難。
  13. Using the method of conversing double integrals into linear integrals, we obtain two theorems and their corollaries for double integrals of linear - fractional homogeneous functions with two variables, and construct some typical examples that are difficult to be calculated by ordinary methods to illustrate their applications

    摘要通過把二重積分轉化成曲線積分，得到二元分式線性齊次復合函數積分的兩個定理及其若干推論，並構造一些比較典型的用一般方法難以計算的例子說明結論的應用。
  14. Experimentally, the plasma produced by cable plasma gun ( c - gun ) and dense plasma focus ( dpf ) was measured by the laser differential interferometer system. the clear interference patterns were acquired at different time. the contour maps of line integral density and curves of radial local density at different height above nozzle were presented

    實驗上，對等離子體斷路開關中的電纜等離子體槍（ c - gun ）和等離子體焦點裝置（ dpf ）產生的等離子體進行了測量，獲得了對應不同時刻的清晰的干涉圖像，給出了線積分密度等值線圖和距噴口不同高度處的徑向密度分佈。
  15. Firstly the phase is extracted from interferogram by filtering and displacing frequency spectrum. then the wavefront and the line integral density are recovered by using fft or polynomial fitting method. lastly the radial local density distribution is calculated from the fitting curve of line integral density by the abel inversion

    首先對干涉圖進行頻譜濾波，用頻譜移頻法從干涉圖中提取相位，然後用快速傅立葉變換或多項式擬合實現波面重建，計算線積分密度，再利用abel積分變換從線積分密度的擬合曲線中反演徑向體密度分佈。
  16. Abstract : in tokamak plasma radiation diagnostics, if the width of a detected plasma chord is comparable with the plasma minor radius, the plasma boundary may influence the line - integrated emissivity considerably and make it a weighted integral of the width - averaged emissivity

    文摘:在托卡馬克輻射診斷中，當探測束線的極向寬度與等離子體小半徑可以比較時，等離子體邊界會顯著影響線積分輻射率，使其成為寬度平均輻射率的帶權重的線積分。
  17. The thesis " main studies and achievements are as follows : 1. under the assumption of double - layer computational mode, the governing equations for the horizontal 2 - d stratified density current is derived by integrating the 3 - d fundamental equations along the flow depth. 2

    在異重流雙層計算模式下，從三維水沙基本方程出發，利用數學工具沿垂線積分，推導得出了平面二維異重流上、下兩層水體的水沙運動基本方程。
  18. A line integral of the second type changes sign when the direction of the integration path is reversed

    當積分路徑改變方向時，第二類曲線積分改變符號。
  19. Similar formulae hold for a line integral of the second type taken over a space curve

    對于空間曲線上的第二類曲線積分也有類似的公式。
  20. Numerical integration of ordinary integrals and line integrals

    一般的積分以及線積分的數值積分。
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